Slider Automatic Stopper Leaf Spring Holding Mechanism
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Solution Overview
Problem
Existing sliders with automatic stoppers face challenges in accurately assembling and securely holding a leaf spring, leading to potential interference and loss of elasticity during assembly, especially when the accuracy of caulking is low, resulting in restricted movement or deformation of the leaf spring.
Innovation Solution
The design incorporates a cover with projections and supporting pieces that hold the leaf spring at positions separated from its ends, allowing for loose movement and effective utilization of grooves and spaces within the cover, ensuring the leaf spring can swing vertically and maintain elasticity, while the body and pawl rod are positioned to facilitate smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the leaf spring is suspended between the first holding parts on the mounting poles and the cover is put on to cover the mounting poles, then the leaf spring can be held in place, but the opposite ends of the leaf spring are clamped between the second holding parts and the upper wall of the cover, restricting movement and requiring high caulking accuracy
Solution Approach 1:
The invention extracts the clamping function from the cover's upper wall and relocates it to dedicated holding parts on the mounting poles. The second holding parts are positioned at the front and back ends of the inner face of the cover, separate from the upper wall, allowing the leaf spring to be held without being clamped between the cover wall and holding parts. This separation enables the leaf spring to swing freely in the vertical direction while maintaining stable holding.
Solution Approach 2:
The holding mechanism is segmented into multiple independent components: first holding parts on the mounting poles, second holding parts on the cover, and supporting pieces on the side walls. This segmentation allows each component to perform its specific function without interfering with others, enabling the leaf spring to be held stably while maintaining movement freedom.
2Manufacturing precision
If the opposite ends of the leaf spring are clamped between the second holding parts and the upper wall of the cover, then the leaf spring can be secured, but high caulking accuracy is required and interference may occur when accuracy is low
Solution Approach 1:
The invention removes the interference-prone clamping arrangement where the upper wall of the cover contacted the second holding parts. By repositioning the second holding parts to the front and back ends of the inner face, away from the upper wall, the design eliminates the source of interference. This allows assembly with lower caulking accuracy while maintaining secure holding of the leaf spring.
Solution Approach 2:
The supporting pieces on the side walls of the cover act as intermediaries between the second holding parts and the leaf spring. These supporting pieces, which can be folded, provide additional support and positioning, reducing the precision requirements for caulking the second holding parts to the mounting poles while ensuring stable holding of the leaf spring.
3Reliability
If the leaf spring is held firmly to prevent movement, then holding stability is improved, but the leaf spring may be plastically deformed to lose elasticity
Solution Approach 1:
The invention introduces dynamic elements to the holding mechanism: the supporting pieces on the side walls can be folded, and the second holding parts are positioned to allow vertical swinging movement. This dynamic design enables the leaf spring to move freely within certain limits while maintaining stable holding, preventing plastic deformation and preserving elasticity through controlled movement rather than rigid constraint.
Solution Approach 2:
The holding mechanism applies different constraints to different parts of the leaf spring: the first holding parts on the mounting poles provide stable holding at the suspension points, while the second holding parts on the cover provide localized support at the front and back ends without restricting vertical movement. This localized quality of constraint maintains elasticity while ensuring holding stability.
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 allows for stable assembly and operation of the slider, ensuring the leaf spring can swing freely and maintain its elasticity, enhancing the slider's performance and preventing deformation, even during elastic deformation, thus improving the slider's operational smoothness and reliability.
Implementation Method 1
the leaf spring can swing freely and maintain its elasticity, enhancing the slider's performance and preventing deformation, even during elastic deformation
Data Source
AI summary
A slider for a slide fastener with an automatic stopper, includes: a body; a pull; a pawl rod; a leaf spring; and a cover including front, back, side and upper walls. The side walls are provided at respective centers thereof with openings through which a pivotal shaft of the pull can be passed. A pair of mounting parts are provided in the front and in the back on an upper wing plate of the body. Holding mechanisms for holding the leaf spring are provided in the front and in the back on an inner face of the cover at respective positions inwardly separated from the front wall and the back wall. The leaf spring defines spaces between the holding mechanisms and the upper wall. The holding mechanisms hold the leaf spring at positions inwardly separated from opposite ends thereof. The cover is fixed to the front and back mounting parts.