Child Seat Footrest Locking Structure to Prevent Impact Skipping
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Solution Overview
Problem
Child safety seat foot pedals can accidentally detach from their fixing devices during collisions, leading to a 'skipping' phenomenon where the foot pedal is released from its extended or retracted position, posing safety risks.
Innovation Solution
An anti-skipping device comprising fixed bases with slide rails, a locking member with arms and a crossbar that prevents lateral displacement of side walls, and an elastic member to maintain the locking member in a locked position, ensuring the foot pedal remains securely locked in its position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixing device is used to secure the foot pedal in extended or retracted position, then the foot pedal can be fixed in position, but upon impact the foot pedal may detach from the fixing device causing skipping
Solution Approach 1:
The fixing device is divided into multiple independent locking members (first locking member and second locking member) that separately engage with the extension member at different locations. This segmentation ensures that if one locking mechanism is subjected to impact, the other continues to provide restraint, preventing complete detachment and skipping of the foot pedal.
Solution Approach 2:
Multiple locking members are combined to work together with the extension member, creating a redundant locking system. The first locking member and second locking member both engage with the extension member simultaneously, providing multiple restraint points that collectively prevent impact-induced detachment and maintain foot pedal position stability.
2Adaptability or versatility
If the foot pedal is made extendable to allow position adjustment, then usability is improved, but the risk of accidental detachment during impact increases
Solution Approach 1:
The fixing device incorporates a dynamic locking mechanism where the locking members can engage and disengage controllably. The extension member can be moved between extended and retracted positions by controlling the locking members, providing adaptability for position adjustment while maintaining reliability when locked in position through multiple engagement points.
Solution Approach 2:
The system changes the engagement state of the locking members as a parameter - when locked, the locking members engage with the extension member to provide stable positioning; when adjusted, the locking members disengage to allow movement. This parameter change enables both adaptability for position adjustment and reliability for position stability.
Data Source
AI summary
An anti-skipping device including: a pair of fixed bases, symmetrically disposed on both sides, having slide rails extending along a longitudinal direction, and having two side walls facing each other along a transverse direction perpendicular to the longitudinal direction; an extension member, movably inserted on the fixed bases, and being slidable along the slide rail to move between an extended position and a retracted position in respect to the fixed bases; a locking member for coupling the fixed bases and the extension member, so as to lock a position of the extension member in respect to the fixed bases; and a crossbar, disposed on the two side walls to prevent the two side walls from being laterally displaced from each other.