Ergonomic chair
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Solution Overview
Problem
Conventional ergonomic chairs often fail to provide a comfortable, ergonomically optimal, and active sitting position, leading to muscle tension and reduced cognitive engagement, especially during prolonged use such as computer work or gaming, where an active position is crucial for improved reaction times and focus.
Innovation Solution
The ergonomic chair features a seat that urges the user's hip forward, a lower leg support, a chest support for forward leaning, and a hip support, with specific geometric arrangements to incline the femur bone at 40-75° and position the lumbar vertebrae perpendicular to the sagittal plane, encouraging an active sitting posture while minimizing pressure on sensitive areas through softer cushioning or recesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ergonomic chairs use hard cushioning for structural support, then the chair maintains proper posture support, but it increases pressure on sensitive areas causing discomfort during prolonged use
Solution Approach 1:
The seat cushion employs differentiated local quality by using softer material specifically at the forward end where private parts contact, while maintaining firmer material in other areas for structural support. This resolves the contradiction by providing both comfort in sensitive areas and adequate support elsewhere.
Solution Approach 2:
The seat cushion is segmented into zones with different cushioning characteristics - a softer forward end zone and a firmer rear zone. This segmentation allows each zone to perform its specific function: the soft zone reduces pressure on sensitive areas while the firm zone maintains overall posture support.
2Ease of manufacture
If the seat uses uniform cushioning throughout, then manufacturing is simple, but it causes discomfort and pressure points on sensitive areas
Solution Approach 1:
Rather than uniform cushioning, the invention applies local quality variation with softer material at the forward end of the seat. This resolves the contradiction by accepting slightly increased manufacturing complexity in exchange for eliminating harmful pressure points on sensitive areas.
3Productivity
If the chair encourages an active forward-leaning position, then cognitive engagement and reaction times improve, but it increases muscle tension and reduces comfort for prolonged use
Solution Approach 1:
The chair provides beforehand cushioning at the forward end of the seat where the user's private parts contact during forward-leaning positioning. This anticipatory cushioning allows users to maintain the cognitively beneficial active position without experiencing discomfort or excessive muscle tension, thus resolving the contradiction between productivity and comfort.
4Object-affected harmful factors
If the chair uses a laidback passive sitting position, then comfort is increased, but cognitive engagement and reaction times decrease
Solution Approach 1:
The invention changes the physical parameters of the seat by softening the forward end material, which enables users to transition from a laidback passive position to an active forward-leaning position. This parameter change in the seat's mechanical properties allows simultaneous achievement of comfort and improved cognitive engagement.
Data Source
AI summary
An ergonomic chair comprising a seat, a lower leg support, a chest support and a hip support. The seat is configured to support the posterior thigh and/or buttocks of a seated user, the seat being configured to urge the hip of the seated user in a forward direction. The lower leg support is configured to support the anterior side of the lower legs of the seated user. The chest support is configured to support the chest of the seated user in a forward leaning position of the seated user. The hip support is configured to support the anterior hip of a seated user as the seat urges the seated user's hip forwardly towards the hip support.