Headrest Guide Latch Locking Structure Against Unintended Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing guide devices for headrest retaining rods are prone to unintentional movement from the latching position to the release position due to unfavorable force constellations, such as strong acceleration forces, compromising the safety function of the retaining rod.
Innovation Solution
A guide device with a latch system that includes a latch structure and a locking mechanism, where the latch is movable between latching and release positions, and a locking structure that prevents unintended movement by engaging with the retaining rod's latch surface, ensuring the latch remains engaged even under accident forces. The locking structure is designed to absorb forces and prevent movement out of the latching position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple latch device is used, then the device complexity is reduced, but the reliability of preventing unintentional release is worsened
Solution Approach 1:
The latch device is divided into functionally independent components: a latch element for engagement with the retaining rod and a separate locking element that prevents unintentional release. This segmentation allows each element to perform its specific function reliably without increasing overall system complexity.
Solution Approach 2:
The locking element is designed to preemptively counteract forces that could cause unintentional release. By positioning the locking element to engage with the retaining rod before accidental forces can act on the latch, the system prevents harmful movements before they occur.
2Reliability
If a locking structure is added to prevent unintentional release, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The locking element and latch element are integrated into a single unified structure that operates as one cohesive unit. This merging reduces the number of separate components and simplifies the overall device while maintaining the dual functionality of latching and locking.
Solution Approach 2:
The locking element is designed to automatically engage and disengage based on the operational state of the latch mechanism. The system self-regulates the locking state without requiring external control, reducing the need for additional control components and simplifying the device architecture.
Data Source
AI summary
A guide device for a retaining rod of a headrest, having a guide structure forming a channel for guiding and supporting the retaining rod, having a latch device including a latch movable between a latching position and a release position. The latch cooperates with a latch structure of the retaining rod to prevent movement of the retaining rod relative to the guide structure in at least one direction. In the latching position the latch device is engaged with the latch structure of the retaining rod and in the release position the latch is disengaged from the latch structure. The latch device has a locking device movable between a locking position and a disengagement position and has a locking structure which, in the locking position, is in the movement path of the latch to prevent movement from the latching position into the release position and, in a disengagement position, enable movement of the latch into a release position.