Loop Latch Release Mechanism Without Cross Rod Packaging Limits
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Solution Overview
Problem
Existing seat assembly loop latch mechanisms with motors and cross rods cause foot room and packaging issues.
Innovation Solution
A loop latch release mechanism that operates without a cross rod, utilizing a plunger and rotating cam to unlock and relock the loop latch, allowing for seat adjustment without the need for a motor-driven cross rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor and cross rod are used to unlock and relock the loop latch mechanisms, then the seat assembly can be adjusted fore-aft, but foot room and packaging issues occur
Solution Approach 1:
The patent removes the cross rod component from the loop latch release mechanism. Instead of using a cross rod that spans between opposing loop latch mechanisms, the invention uses individual release mechanisms at each loop latch location that operate independently or in coordination without requiring the cross rod linkage, thereby eliminating the packaging and foot room issues
Solution Approach 2:
The patent divides the loop latch release function into separate, localized release mechanisms at each loop latch location. Rather than a single motor driving a cross rod that actuates both latches simultaneously, each latch has its own release mechanism that can be actuated independently, reducing the overall space requirements
2Ease of operation
If a motor and cross rod are used to unlock and relock the loop latch mechanisms, then the seat assembly can be adjusted fore-aft, but packaging issues occur
Solution Approach 1:
The patent removes the cross rod component from the loop latch release mechanism. Instead of using a cross rod that spans between opposing loop latch mechanisms, the invention uses individual release mechanisms at each loop latch location that operate independently or in coordination without requiring the cross rod linkage, thereby eliminating the packaging and foot room issues
Solution Approach 2:
The patent repositions the loop latch release mechanisms to utilize vertical space within the seat assembly structure rather than requiring horizontal space for a cross rod. The release mechanisms are integrated into the vertical stacking arrangement of the seat pan, backrest, and headrest, effectively using the vertical dimension to accommodate the adjustment mechanism
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 solution provides a compact and efficient seat adjustment system that eliminates foot room and packaging constraints while maintaining effective seat positioning and stability.
Implementation Method 1
a rotating cam configured to selectively actuate the plunger
Data Source
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AI summary
A loop latch release for an automotive seat assembly having a loop latch includes a mounting bracket, a shaft rotatably coupled to the mounting bracket, a rotating cam pivotably coupled to the shaft and including a ratchet gear having notches and a cam having a cam side portion and an actuating portion, a plunger operatively coupled to the cam and transposable between a raised position engaged with the cam side portion and a lowered position engaged with the actuating portion, a lever arm pivotably coupled to the shaft, an arm pawl pivotably coupled to the lever arm and configured to meshingly engage with an adjacent notch on the ratchet gear, and a bracket pawl pivotably coupled to the mounting bracket and configured to meshingly engage with an adjacent notch on the ratchet gear.