Multi-Latch Release Mechanism With Differential Cable Lengths
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Solution Overview
Problem
Existing vehicle latch systems face challenges in synchronizing the release travel of multiple latches due to accumulated tolerances, making it difficult to release all latches with a single handle and single pull.
Innovation Solution
A mechanism involving a first member slidably received within a housing, a second member rotatably secured for movement about an axis, and cables secured to both members, where the second cable is shorter than the first cable, allowing rotational movement to balance force distribution across latches, enabling simultaneous release with a single pull.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple latches are connected to a single release mechanism with equal length cables, then the structure is simple, but the latches cannot be synchronized due to accumulated tolerances and varying release travel
Solution Approach 1:
The patent applies local quality by making the second cable shorter than the first cable. This differential cable length configuration compensates for accumulated tolerances and varying release travel distances of different latches, enabling synchronized release without requiring complex adjustment mechanisms throughout the entire system.
Solution Approach 2:
The patent changes the parameter of cable length to resolve the synchronization problem. By specifying that the second cable is shorter than the first cable, the system compensates for differences in latch release travel and accumulated tolerances, achieving synchronized latch release while maintaining structural simplicity.
2Manufacturing precision
If cables of different lengths are used to compensate for tolerance accumulation, then latch synchronization is achieved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by making the second cable shorter than the first cable. This differential cable length configuration compensates for accumulated tolerances and varying release travel distances of different latches, enabling synchronized release without requiring complex adjustment mechanisms throughout the entire system.
Solution Approach 2:
The patent changes the parameter of cable length to resolve the synchronization problem. By specifying that the second cable is shorter than the first cable, the system compensates for differences in latch release travel and accumulated tolerances, achieving synchronized latch release while maintaining structural simplicity.
3Manufacturing precision
If a rotatable member is added to balance force distribution, then latch release is synchronized, but the device complexity increases
Solution Approach 1:
The patent merges the cable support function with a rotatable member that is already part of the release mechanism. The rotatable member serves dual purposes: it guides the cables and automatically balances force distribution through its rotational movement, eliminating the need for separate force-balancing components.
Solution Approach 2:
The patent introduces dynamics by allowing the second member to rotate about an axis. This rotational movement enables the mechanism to dynamically adapt to varying latch release travel and force requirements, automatically balancing the force distribution as the latches are released.
Data Source
AI summary
A mechanism for use with multiple latches that are to be released by a single handle and by a single pull. A method for actuating multiple latches with a single handle and by a single pull. A release mechanism for use with multiple latches that are to be released by a single handle and by a single pull, including: a first member slidably received within a housing; a second member rotatably secured to the first member for movement about an axis within the housing and with respect to the first member; a first cable secured to the first member and slidably received within the housing; a second cable secured to the second member and slidably received within the housing; and a third cable secured to the second member and slidably received within the housing, wherein the second cable is shorter than the first cable.