Automotive Head Restraint Locking Assembly for Easy Height Adjustment
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Solution Overview
Problem
Existing head restraint systems for automotive vehicle seats lack a reliable and user-friendly mechanism for adjusting the height of the headrest, which can compromise comfort and safety by not allowing for optimal positioning relative to the seat back.
Innovation Solution
A head restraint system featuring a post with a support member and a headrest assembly that includes a locking mechanism, an actuator, and a spring clip system, allowing the headrest to be adjusted in height by rotating a column member using a button actuator, enabling easy movement and secure locking in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking mechanism is added to the headrest system to enable height adjustment, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical locking systems with a simpler actuator-based mechanism. The actuator engages with notches on the column member to provide locking at different heights, eliminating the need for traditional multi-component mechanical locks while maintaining ease of adjustment and secure positioning.
Solution Approach 2:
The patent uses parameter changes in the form of notches at different positions on the column member to enable discrete height adjustments. By varying the notch positions along the vertical axis, the system provides multiple locking heights without requiring complex adjustment mechanisms, thus improving ease of operation while controlling complexity.
2Adaptability or versatility
If the headrest assembly is made movable relative to the post to allow height adjustment, then the adaptability is improved, but the reliability of the locking mechanism may worsen
Solution Approach 1:
The patent incorporates a spring-loaded column member that preliminarily stores mechanical energy. When the actuator engages a notch, the spring is compressed and locked in place, creating a pre-loaded secure connection. This preliminary spring engagement ensures reliable locking before any load is applied to the headrest assembly.
Solution Approach 2:
The patent transforms the static headrest system into a dynamic one where the column member can move vertically along the post while maintaining secure engagement. The notched shaft design allows controlled movement to different positions, and the actuator provides dynamic locking capability, enabling the system to adapt to different heights while maintaining reliability through the spring-loaded engagement 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
Enables easy adjustment and secure locking of the headrest height, enhancing user comfort and safety by allowing optimal positioning relative to the seat back, while maintaining structural integrity and ease of use.
Implementation Method 1
The spring clip is biased against the notched shaft
Implementation Method 2
an actuator configured to rotate the notched shaft relative to the retention member
Data Source
AI summary
A head restraint system for an automotive vehicle seat includes a post having first and second end portions, a support member fixedly attached to the second end portion of the post, and a head rest assembly. The support member includes a locking feature. The head rest assembly includes a housing supported by the support member, a locking member, and an actuator configured to move the locking member from a locked position with the locking feature to an unlocked position from the locking feature to permit the headrest assembly to move relative to the post and support member.