Slider Fastener Control Claw Rigidity and Compactness
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Solution Overview
Problem
Conventional sliders with automatic stop functions face challenges in achieving desired rigidity of the control claw due to thickness limitations from press processing, and have increased up-down direction dimensions due to separate components and overlapping structures.
Innovation Solution
A slider design with a separate control claw and cover, where the cover includes a plate spring portion extending along the front surface of the attachment column, allowing for reduced up-down direction dimension and independent rigidity of the control claw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control claw is made as a portion of the cover to reduce component number, then the structure is simplified, but the rigidity of the control claw becomes dependent on cover thickness which is limited by press processing requirements
Solution Approach 1:
The invention separates the control claw from the cover, making them independent components. This allows the control claw to be designed with optimal thickness and rigidity independent of the cover's press processing requirements, while still maintaining a compact overall structure through precise fitting between components.
2Ease of manufacture
If the cover thickness is reduced to facilitate press processing, then the ease of manufacture is improved, but the rigidity of the control claw decreases
Solution Approach 1:
By separating the control claw from the cover, the invention allows each component to be optimized independently. The cover can be made thin for easy press processing, while the control claw can have sufficient thickness for required rigidity.
Solution Approach 2:
The invention applies different quality requirements to different components: the cover is designed for ease of manufacture with thinner gauge suitable for press processing, while the control claw is designed with local quality emphasis on rigidity and strength at the claw engagement point.
3Reliability
If separate components (control claw, plate spring, cover) are used to ensure functionality, then the reliability is improved, but the up-down direction dimension increases due to overlapping structures
Solution Approach 1:
The invention arranges the control claw, plate spring, and cover in a nested configuration where components are positioned one above another in the up-down direction but occupy overlapping horizontal spaces. This nesting reduces the overall up-down dimension while maintaining the functionality of separate components for reliable automatic stop operation.
Solution Approach 2:
The invention transitions from a vertical stacking arrangement to a more compact three-dimensional arrangement where components are positioned in overlapping horizontal planes. This dimensional reorganization reduces the up-down direction dimension while preserving the separate component structure needed for reliability.
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
The design minimizes the number of components and up-down direction dimension, providing higher rigidity and reduced thickness dependency, while maintaining the automatic stop function.
Implementation Method 1
including a plate spring portion extending from a front end of the upper plate portion along a front surface of the front attachment column, wherein the upper plate portion comes in contact with the control claw and pushes the control claw downward due to a restoring force of the plate spring portion
Data Source
Figure 1
Figure 2~3
Figure 4(A)~4(B)
AI summary
A slider comprising, each as separate components: a body (1) having formed therein an element path (1a) that penetrates in the front-rear direction and a hook hole (11a) that connects to overhead, said body having a front attachment column (15) and rear attachment column (16) protruding from the upper surface of an upper blade (11) covering the upper side of the body; a handle (2) rotatable in the front-rear direction and having a shaft (21) being the center of rotation thereof arranged above the upper blade; a control hook (3) placed upon the shaft between the front attachment column and the rear attachment column, controlling the body so as to be movable and immovable, and controlling the movement of the body by changing the entry length of a hook (32) that enters the element path from the hook hole, changing same in accordance with the vertical position of the shaft; and a cover (4) that has an upper plate section and a side panel section that cover the control hook from above and the side, is attached to the front attachment column and rear attachment column so as to be swingable in the vertical direction, and has the upper plate section thereof pressing the control hook downwards as a result of the restorative force of a plate spring (42) extending along a front surface of the front attachment column from a front end of the upper plate section.