Headrest Adjusting Device with Independent Angle and Height Control
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Solution Overview
Problem
Current headrest adjusters for sofas cannot independently adjust the angle and height of the headrest, failing to meet user demands for separate adjustments.
Innovation Solution
A headrest adjusting device featuring a hinge with a first and second rod, a drive device, and a lift mechanism, allowing for independent adjustment of the angle and height by rotating and locking the rods and sliding the hinge, respectively, using a locking member and elastic member for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge or linkage mechanism is used to adjust the headrest, then the angle can be adjusted, but the height cannot be adjusted independently
Solution Approach 1:
The headrest adjusting device is segmented into two independent adjustment mechanisms: a hinge mechanism for angle adjustment and a linkage mechanism for height adjustment. This segmentation allows each mechanism to perform its specific function independently, resolving the contradiction between adjustment capability and mechanism complexity by dividing the overall adjustment system into functional modules.
Solution Approach 2:
The adjusting device achieves multi-functionality by integrating both angle adjustment (via hinge) and height adjustment (via linkage mechanism) into a single system. The linkage mechanism serves dual purposes: it adjusts the height of the headrest and simultaneously coordinates with the hinge to maintain proper positioning, thereby providing versatile adjustment capability without requiring entirely separate systems.
2Ease of operation
If only angle adjustment is provided, then the structure remains simple, but user comfort needs for height adjustment are not met
Solution Approach 1:
The linkage mechanism acts as an intermediary between the hinge mechanism and the headrest. It translates and coordinates the movement required for both angle and height adjustment, mediating the interaction between these two adjustment functions. This intermediary mechanism enables height adjustment while maintaining coordination with the angle adjustment system, thereby improving user comfort without creating conflicting adjustment actions.
Data Source
AI summary
A headrest adjusting device includes a hinge, a fixed base and a drive device. The drive device is fixed on the fixed base and has an output end that is capable of sliding upwards or downwards, the hinge comprises a first rod and a second rod which are pivotally connected together, the second rod can be rotated or locked relatively to the first rod, and the first rod is driven by the output end of the drive device to move upwards or downwards. By the headrest adjusting device, the angle and the height of the headrest can be adjusted independently, thereby meeting demands of the users. Additionally, the hinge and the drive device can be adjusted at the same time, to simultaneously adjust the angle and the height of the headrest.