Headrest Bottom Recess Structure to Avoid Guide Head Contact
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Headrests with bottom plates that are adjustable in the front-rear direction can collide with headrest guides, causing damage and abnormal noise due to contact.
Innovation Solution
A headrest design with recesses on its bottom surface that are separate from the headrest guides, allowing for adjustable front-rear movement without interference, and a bottom cover that accommodates the guides to prevent contact and enhance structural rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bottom plate is provided on the headrest to enable front-rear adjustment, then the headrest position adjustability is improved, but the bottom plate contacts the headrest guide heads causing damage and abnormal noise
Solution Approach 1:
The headrest guide heads are nested within the recesses formed in the bottom plate. This nesting arrangement allows the guide heads to be accommodated inside the headrest structure during normal operation, preventing direct contact between the bottom plate and guide heads while enabling front-rear adjustment functionality.
Solution Approach 2:
The solution introduces a vertical dimension by forming recesses downward from the bottom plate surface. This dimensional change creates clearance space between the bottom plate and the guide heads, allowing the headrest to move in the front-rear direction without the bottom plate contacting the guide heads.
2Ease of operation
If the headrest is made adjustable in the front-rear direction, then the seating comfort is improved, but the bottom plate and headrest guide heads collide causing damage
Solution Approach 1:
The guide heads are nested within the recesses of the bottom plate, creating a protective enclosure that prevents collision damage during front-rear adjustment operations while maintaining seating comfort.
Solution Approach 2:
The recesses are formed in advance in the bottom plate to accommodate the guide heads, providing a pre-prepared protective structure that prevents collision damage before it can occur during headrest adjustment operations.
3Reliability
If a bottom cover with recesses is added to prevent contact, then damage and noise are suppressed, but the device complexity increases
Solution Approach 1:
The bottom cover is merged with the bottom plate to form an integrated structure. The recesses are formed directly in the bottom plate itself rather than as separate components, combining the protective function with the existing structural element and minimizing additional complexity.
Solution Approach 2:
The bottom plate serves multiple functions: it provides the structural base for the headrest, enables front-rear adjustment, and contains the recesses to protect the guide heads. This multi-functionality reduces the need for additional separate protective components.
Data Source
AI summary
A headrest is to be mounted to the top of a seat back with a headrest pillar and a headrest guide height-adjustably supporting the headrest pillar and being attached to the seat back such that the head of the headrest guide is exposed from the top of the seat back. The headrest includes a recess on a bottom of the headrest, the recess facing the head of the headrest guide. The surface of the recess is set to be separate from the head of the headrest guide.