Single-Lever Multi-Axis Headrest Locking for Tool-Free Adjustment
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Solution Overview
Problem
Existing headrest systems require tools for adjustment and locking, making them time-consuming and compromising between adjustability and security, with tool-less solutions often lacking the necessary strength of lock or securement.
Innovation Solution
A tool-less, multi-axis adjustable headrest system utilizing a single lever or point of adjustment with a locking mechanism that generates clamping force to secure the headrest in four dimensions (yaw, roll, pitch, and extension) without external tools, employing movable wedges or cams for clamping and unclamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tool-less adjustment mechanism is used, then ease of operation is improved, but locking strength deteriorates
Solution Approach 1:
The system employs dynamic locking mechanisms including movable wedges and cams that can transition between locked and unlocked states. The wedge moves along an inclined plane to progressively clamp the extension tube, while the cam rotates to engage or disengage locking surfaces, providing both ease of operation and strong locking capability through controlled mechanical motion
Solution Approach 2:
The locking mechanism is divided into separate functional components: a lever for actuation, a wedge for clamping force generation, and a cam for engagement control. This segmentation allows each component to perform its specific function efficiently while working together to achieve both easy operation and strong locking
2Adaptability or versatility
If multi-axis adjustability is provided, then adaptability is improved, but device complexity increases
Solution Approach 1:
A single lever actuates multiple locking mechanisms simultaneously, providing universal control for all adjustment axes. The same lever can adjust the extension tube position, headrest angle, and other parameters, reducing the number of controls needed while maintaining comprehensive adjustability across multiple dimensions
Solution Approach 2:
Multiple adjustment functions are combined into a unified system where the lever, wedge, and cam work together to control various axes of the headrest. This merging of functions reduces the number of separate mechanisms needed while maintaining full multi-axis adjustability
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, secure, and tool-free adjustment of the headrest in multiple axes, optimizing user comfort, function, and safety with enhanced ease and control for caregivers, maintaining durability and security.
Implementation Method 1
the locking mechanism comprises at least one movable wedge for clamping and unclamping a portion of the headrest mounting assembly and headrest extension tube against the housing
Implementation Method 2
the locking mechanism comprises at least one movable cam component for clamping and unclamping a portion of the headrest mounting assembly and headrest extension tube against the housing
Data Source
AI summary
A multi-axis headrest system for simultaneously locking or adjusting all axis of an adjustable headrest with a single lever or a single point of adjustment is provided. No external tools are required but may be used if desired. The single lever or point of adjustment allows the headrest to be correctly positioned optimizing the comfort, function and safety of the user. The single lever or point of adjustment provides the caregiver, or attending individual, the ability to adjust the positioning of the headrest with greater ease, more control and confidence. The single lever or point of adjustment causes a locking mechanism or means to generate a clamping force that locks the headrest in place. The same lever or point of adjustment also causes the locking mechanism or means to release the clamping force to allow adjustment of the headrest. The ease of adjustability is achieved without compromising security and durability.