Physiological seat device
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Solution Overview
Problem
The conventional sitting position leads to postural-respiratory degeneration, causing morphological and functional issues such as abdominal wall relaxation, vertebral column compression, decreased ventilatory efficiency, and obstructive ventilatory sleep disorders, which negatively impact quality of life and productivity.
Innovation Solution
A seat device with a pivoting mechanism that allows the seat to rotate and a lumbar part to press against the user's back, maintaining an optimal vertebral column alignment, combined with an adjustable saddle to correct pelvic orientation, thereby promoting physiological posture and reducing stress on the axial skeleton.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional chair is used, then the sitting position is comfortable and stable, but it causes pelvic retroversion, thoracic kyphosis, and postural-respiratory degeneration
Solution Approach 1:
The seat is made dynamically adjustable through a pivot mechanism that allows it to rotate between a first position (aligned with backrest) and a second position (angled forward). This dynamic adjustment enables the seat to adapt to different sitting postures, promoting optimal pelvic alignment and preventing retroversion while maintaining comfort through movement rather than static support.
Solution Approach 2:
The lumbar support is positioned and configured to preemptively counteract the natural tendency toward thoracic kyphosis and pelvic retroversion. By providing preliminary corrective force through the angled seat position and lumbar support geometry, the device prevents postural degradation before it occurs, rather than attempting to correct it after the fact.
2Stability of the object's composition
If the seat is made fixed and stable, then it provides consistent support, but it cannot correct pelvic orientation or vertebral alignment
Solution Approach 1:
The pivot mechanism transforms the seat from a static, fixed structure into a dynamic system that can assume multiple stable positions. The seat maintains stability in each position while the ability to transition between positions provides the adaptability needed for posture correction. The mechanism allows the seat to be stable during use while correcting pelvic and vertebral alignment through its adjustable geometry.
3Object-affected harmful factors
If the seat pivots forward to correct posture, then it improves vertebral alignment, but it may increase stress on the user's back
Solution Approach 1:
The lumbar support acts as a counterbalancing element that offsets the forward pivot angle. By positioning the lumbar support to provide backward-directed force, it counterweights the potential excessive stress from the forward-angled seat, distributing loads more evenly across the axial skeleton while maintaining the posture-correcting geometry.
Solution Approach 2:
The seat applies different functional qualities to different regions: the forward pivot angle provides posture correction at the pelvic and thoracic levels, while the lumbar support provides localized counterbalancing force at the lower back. This localized differentiation allows simultaneous achievement of alignment correction and stress reduction.
Data Source
AI summary
This disclosure relates to a seat device (1) comprising an underframe (2) and a seat (3) connected to the underframe (2) in such a way as to pivot about a pivot seat axis (A1), there being provided means for elastically biasing the seat (3) in anti-clockwise rotation. The seat device (1) further comprises a lumbar part (42); rotationally secured to the seat (3), and a saddle (5) for supporting the top of the thighs of the user, the saddle (5) being connected to the front region of the seat (3).