Car Seat Strap Bypass Mechanism for Installation
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Solution Overview
Problem
Conventional car seat installations where the seat belt strap runs over the upper part of the car seat can obstruct the installation, removal, or readjustment of a child, compromising safety and ergonomics, especially when the seat is rear-facing.
Innovation Solution
The car seat incorporates bypass means that temporarily separate the seat belt strap from the shell during installation or removal, allowing the strap to follow a curved path and automatically return to a secure position for safety, facilitated by rotatable diversion means and timing mechanisms to ensure correct locking of the child's harness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seat belt strap runs over the upper part of the car seat to hold it secured, then the safety and stability of the car seat is improved, but the ease of installing and removing the child deteriorates due to strap obstruction
Solution Approach 1:
The patent divides the strap path into two distinct phases: a first path during installation/removal that bypasses the upper part of the shell, and a second path during normal use that runs over the upper part for secure retention. This segmentation allows the system to optimize for different operational states independently.
Solution Approach 2:
The patent employs dynamic repositioning of the strap through adjustable guide means (such as movable stirrups or rotatable elements) that allow the strap to transition between different paths. This dynamic adjustment enables the strap to move from obstructing the child access area during installation to securing the shell properly during use.
2Ease of operation
If the strap path is modified to facilitate child installation, then the ease of operation is improved, but the safety and stability of the car seat may deteriorate
Solution Approach 1:
The guide means are designed to be movable or adjustable, allowing the strap path to dynamically change between an installation-friendly path (bypassing the upper shell) and a secure retention path (running over the upper shell). This ensures both ease of operation and safety are achieved at different times in the operational cycle.
Solution Approach 2:
The system prepares the strap in a preliminary configuration during installation that facilitates easy child access, then transitions to the final secure configuration once the child is properly positioned. This preliminary action allows optimal installation ergonomics without compromising final safety.
3Ease of operation
If the strap automatically returns to the secure position after bypass, then the ease of operation is improved through automatic safety engagement, but the device complexity increases due to timing and control mechanisms
Solution Approach 1:
The patent employs self-actuating mechanisms such as spring-loaded guide means, gravity-assisted rotation, or elastic elements that automatically return the strap to its secure position after bypass. The system uses the energy stored during the bypass action (or external forces like gravity/springs) to automatically restore the safe configuration without requiring additional power sources or complex control systems.
Solution Approach 2:
The patent introduces intermediary elements such as spring mechanisms, gravity wells, or friction-based detents that mediate between the bypass position and the secure position. These intermediaries provide the automatic return function while keeping the overall system relatively simple by using passive mechanical means rather than active control systems.
Data Source
Figure 1~2
Figure 3A~3C
Figure 4A~4D
AI summary
The seat (102) has a bypassing unit (105) for bypassing a strap (101) of a safety belt, and guiding and receiving unit for guiding and receiving the strap. The bypassing unit is movable between bypassing position and releasing position. The strap is maintained in a drifted position facilitating placement of a child in the bypassing position. The strap is not maintained in the releasing position by the bypassing unit. The drifted position and the releasing position are separated by an angle.