Child Seat Footrest Locking Structure to Prevent 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 with fixed bases, a slidable extension member, a locking mechanism, and a crossbar that prevents lateral displacement of side walls, ensuring the foot pedal remains securely locked in its position by using insertion slots, plug passing slots, and an elastic member to maintain the locking mechanism in a locked state.
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 can independently engage with corresponding locking structures. This segmentation ensures that if one locking member fails under impact, the other can still maintain the foot pedal position, preventing complete detachment and skipping.
Solution Approach 2:
The locking members are pre-positioned and spring-loaded to automatically engage with the locking structures when the foot pedal reaches its extended or retracted position. This preliminary action ensures that the locking mechanism is already in place before impact occurs, preventing detachment rather than reacting after failure.
2Adaptability or versatility
If the foot pedal is made extendable to provide adjustable positioning, then usability is improved, but the complexity of the fixing device increases
Solution Approach 1:
The foot pedal is designed with multiple locking positions (extended, retracted, and intermediate positions) that are mechanically equivalent in terms of locking mechanism engagement. Each position utilizes the same spring-loaded locking members and corresponding locking structures, creating equipotential locking points that simplify the overall design while providing versatility.
Solution Approach 2:
The spring-loaded locking members automatically engage with the locking structures when the foot pedal is moved to any position, without requiring manual intervention or complex control systems. The system self-locks at each position, reducing the complexity of the fixing device while maintaining adaptability.
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 anti-skipping device effectively prevents the foot pedal from detaching during impacts, maintaining its position and enhancing safety by securely locking the extension member to the fixed bases, thus preventing accidents and ensuring the foot pedal's stability and usability.
Implementation Method 1
an elastic member to apply an elastic force to the locking member
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.