Rotation-Limiting Fastener for Foldable Child Carrier Seats
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Solution Overview
Problem
Double-seat strollers with seats arranged up and down face issues of protruding fastening members that can injure children, increase packaging volume, and hinder narrow spaces due to excessive width.
Innovation Solution
A fastening apparatus with a base, rotation member, locking member, elastic element, and releasing member that allows adjustable locking states to prevent protrusion and facilitate folding, ensuring safety and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fastening member is made rigid and non-folding to ensure structural strength, then the strength is improved, but the packaging volume increases and transportation costs increase
Solution Approach 1:
The fastening member is designed to be dynamically adjustable between extended and retracted positions. The rotation member can rotate between a first position (extending the fastening member) and a second position (retracting it), allowing the structure to adapt between strength-required and compactness-required states
Solution Approach 2:
The length parameter of the fastening member is made variable through the rotation mechanism. By changing the rotational angle of the rotation member, the effective length of the fastening member changes, enabling it to provide maximum strength when extended and minimize packaging volume when retracted
2Stability of the object's composition
If the fastening member protrudes outward to maintain structural integrity, then the structural integrity is improved, but it may cause injury to the child and affects appearance
Solution Approach 1:
The fastening member's position is dynamically controlled through the rotation mechanism. When not in use, it can be rotated to a retracted position that eliminates protrusion and injury risk, while maintaining structural integrity when needed through the extended position
Solution Approach 2:
The rotation limiting mechanism预先 prevents the fastening member from protruding into the child's space by limiting the rotation range. The rotation limiter member physically blocks excessive rotation, ensuring the fastening member never reaches a position that could harm the child
3Adaptability or versatility
If the fastening member is made adjustable with rotation function, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The fastening apparatus is segmented into distinct functional components: the rotation member for position adjustment, the rotation limiter member for range control, and the fastening member for structural support. This segmentation allows each component to perform its specific function with simple geometry, reducing overall complexity while maintaining adjustability
Solution Approach 2:
The rotation limiter member acts as an intermediary between the rotation member and the base. It provides the rotation limiting function through a simple geometric constraint (the limiting surface) rather than requiring a complex locking mechanism, thus adding adaptability with minimal complexity increase
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 apparatus prevents injuries and reduces stroller width, enhancing safety and aesthetics while minimizing packaging volume and transportation costs.
Implementation Method 1
an elastic element operably connected to the locking member and configured to maintain the locking member in the locked state
Data Source
AI summary
A fastening apparatus includes: a base having a first sliding groove; a rotation member pivotally connected to the base and having at least two locking states, the rotation member has a second sliding groove; a locking member having a locked state and an unlocked state, in the locked state, the rotation member is located in both the first sliding groove and the second sliding groove; in the unlocked state, the locking member is withdrawn from the first sliding groove or the second sliding groove to allow the rotation member to rotate relative to the base; an elastic element configured to maintain the locking member in the locked state; and a releasing member configured to drive the locking member to move against an elastic force of the elastic element, such that the locking member is switched from the locked state to the unlocked state.