Snap Button Fastener Die for Correcting Inward-Bent Legs
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Solution Overview
Problem
Snap buttons used in baby clothes and similar applications often fail to attach properly due to radially inward bent legs of the button fastener, leading to potential skin irritation and improper attachment.
Innovation Solution
A button fastener-side die equipped with a holding part, a correcting member, and a pushing member, where the correcting member is pushed through the button fastener's opening by the pushing member, utilizing a spring mechanism to correct radially inward bent legs back to their normal position, ensuring proper attachment to the fabric.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the button fastener legs are allowed to bend radially inward during handling or storage, then the device structure remains simple, but the attachment reliability deteriorates because the bent legs cannot properly engage with the snap member
Solution Approach 1:
The die performs preliminary correction of the button fastener legs before the actual snap button attachment process. The correcting member, when pushed through the base opening, straightens any radially inwardly bent legs in advance, ensuring they are in the proper position for reliable engagement with the snap member.
Solution Approach 2:
The correcting member acts as an intermediary tool between the pushing member and the button fastener legs. It translates the pushing force into a correcting action that straightens the bent legs without requiring direct manipulation of each individual leg.
2Manufacturing precision
If a correcting mechanism is added to the button fastener-side die, then the manufacturing precision of leg positioning is improved, but the device complexity increases due to additional components
Solution Approach 1:
The die is segmented into distinct functional components: the holding part for securing the button fastener, the correcting member for straightening legs, and the pushing member for actuating the correction. This modular segmentation allows each component to perform its specific function efficiently while maintaining overall device manageability.
Solution Approach 2:
The correcting mechanism is self-actuating through the pushing member. When the pushing member is actuated, it automatically pushes the correcting member through the base opening, which in turn automatically corrects any bent legs. The system uses the applied force to both drive and execute the correction function without requiring separate control mechanisms.
3Manufacturing precision
If the correcting member is designed to fully extend through the opening, then the legs can be effectively corrected to normal position, but the device complexity increases due to the need for precise positioning mechanisms
Solution Approach 1:
The correcting member automatically positions itself during the pushing action. As the pushing member forces the correcting member through the base opening, the correcting member naturally extends to the point where it contacts the bent legs and applies the necessary correction force. The geometry of the components themselves provides the positioning function without additional mechanisms.
Solution Approach 2:
The correcting member transitions from a retracted state to an extended state during operation. It is pushed through the opening dynamically, allowing it to adapt to the position of the bent legs and apply correction force where needed, rather than being fixed in a predetermined position.
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 solution effectively corrects radially inward bent legs of the button fastener, ensuring secure attachment to the fabric and preventing the legs from returning to their abnormal position, thus enhancing the reliability and safety of snap button attachment.
Implementation Method 1
a first spring disposed between the correcting member and the pushing member, wherein when at least one of the legs of the button fastener is in an abnormal position bent radially inward from a normal position, the correcting member corrects the leg(s) in the abnormal position to be in the normal position as the correcting member is passing through the opening of the button fastener
Data Source
AI summary
Provided is a button fastener-side die. The button fastener comprises an annular base defining an opening and a plurality of legs. The button fastener-side die includes a holding part for holding the button fastener and a correcting member for passing through the opening of the button fastener held by the holding part, a pushing member for pushing the correcting member to move in a passing direction toward passing through the opening of the button fastener, and a first spring disposed between the correcting member and the pushing member. When at least one of the legs of the button fastener is in an abnormal position, the correcting member corrects the abnormal leg(s) to be in the normal position as the correcting member is passing through the opening.