Infant Car Seat Shoulder Strap Retainer With Spring-Biased Latch
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Solution Overview
Problem
Existing car seat designs lack effective mechanisms to securely retain shoulder straps, particularly in infant car seats, which can lead to improper usage and increased risk during accidents.
Innovation Solution
A shell-based apparatus with a securing mechanism that encloses the shoulder strap on multiple sides, utilizing a pivotable mechanism with a biasing element to prevent accidental release, ensuring the strap is securely held until a sufficient force is applied to overcome the biasing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple open shell structure is used to retain the shoulder strap, then the device complexity is reduced and ease of manufacture is improved, but the reliability of strap retention is insufficient and accidental release may occur
Solution Approach 1:
The securing mechanism employs a dynamic latch that can transition between locked and unlocked states. The latch is biased by a spring to automatically engage with the shell, providing reliable retention. When sufficient force is applied to overcome the biasing force, the latch releases, allowing strap removal. This dynamic behavior resolves the contradiction by providing high reliability through automatic engagement while maintaining relatively simple structure.
Solution Approach 2:
The biasing element (spring) applies a preliminary counteracting force to prevent accidental release of the shoulder strap. The spring continuously exerts force on the latch to keep it engaged with the shell, creating a pre-existing resistance against unintended strap removal. This preliminary anti-action ensures reliable retention while using a simple mechanical components.
2Reliability
If a securing mechanism with biasing element is added to prevent accidental release, then the reliability of strap retention is improved, but the ease of operation is reduced as sufficient force must be applied to remove the strap
Solution Approach 1:
The latch incorporates a flexible tab portion that can be manually deflected to disengage the locking mechanism. This flexible element allows the user to easily overcome the spring bias by simply pushing or pulling the tab, providing intuitive and easy operation. The flexibility of this component resolves the contradiction by maintaining reliable retention through spring bias while enabling simple manual release.
3Reliability
If the securing mechanism extends fully between first side and second side to nest in second housing, then the reliability of preventing strap movement is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The securing mechanism is designed to nest within the shell structure. When the latch is in the engaged position, it extends between the first and second sides to prevent strap movement. The housing provides a nested cavity that receives and constrains the latch mechanism, allowing reliable strap retention while keeping the overall device compact and relatively simple to manufacture through nested component arrangement.
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 effectively retains the shoulder strap on the car seat, preventing accidental release and ensuring the strap is only removed when a sufficient force is applied, enhancing safety during accidents.
Implementation Method 1
a spring biases the securing mechanism in the first position
Implementation Method 2
the securing mechanism comprises a body portion and a hinge, the hinge being coupled to the first housing. In some examples, the securing mechanism is configured to pivot between the first position and the second position around a longitudinal axis of the hinge.
Data Source
AI summary
According to at least one aspect of the present disclosure an apparatus for retaining a shoulder strap in an infant car seat is disclosed. The apparatus comprises a shell configured to retain a shoulder strap on at least three sides including a first side, a second side, and a third side, the first and second sides being opposite each other; a securing mechanism rotatably coupled to the first side and configured to extend between the first side and the second side in a first position; and a first housing coupled to the first side and configured to accommodate at least a portion of the securing mechanism in a second position.