Pelvic Support Seating for Upright Posture Without Spinal Immobilization
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Solution Overview
Problem
Current seating solutions fail to maintain proper pelvic and spinal alignment without requiring muscle tension, leading to back pain, postural distortion, and compressed spinal nerves, as they either immobilize the spine or provide unstable support, and are not adaptable to various seating surfaces.
Innovation Solution
An ergonomic seating device with a base plate and pelvic support that maintains a vertical pelvis position without immobilizing the spine, using a mechanism that contacts the posterior superior iliac spines and iliac crests, allowing a 93° to 97° angle between the pelvis and femoral bones, and is adjustable and foldable for portability and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lumbar support systems are used to support the spine, then spinal support is improved, but the spine becomes immobilized and muscle tensions increase
Solution Approach 1:
The invention extracts the support function from the spine itself and relocates it to the pelvis. By supporting the pelvis in a neutral position through the pelvic support element, the spine is freed from immobilization while maintaining proper alignment. This resolves the contradiction by removing spinal support constraints while preserving spinal mobility.
Solution Approach 2:
The pelvic support element performs preliminary action by establishing proper pelvic alignment before the spine needs support. By pre-positioning the pelvis in a neutral, upright orientation, the spine naturally aligns itself without requiring external support, thus maintaining mobility while ensuring proper posture.
2Stability of the object's composition
If standing support devices with excessive forward slope are used, then pelvic verticality is improved, but stability deteriorates and muscle tension increases
Solution Approach 1:
The invention changes the critical parameter from seat slope angle to pelvic support angle. Instead of using excessive forward slope (as in standing devices), the pelvic support element provides vertical support at an optimal angle, maintaining pelvic verticality while ensuring seating stability and comfort.
Solution Approach 2:
Rather than using excessive forward slope to achieve pelvic verticality, the invention applies partial action through a vertically oriented pelvic support element. This provides just enough support to maintain pelvic verticality without the destabilizing effects of excessive slope.
3Adaptability or versatility
If the seating device is made portable and foldable, then adaptability to various surfaces is improved, but structural complexity increases
Solution Approach 1:
The seating device is segmented into distinct components: a base plate and a separate pelvic support element connected by a hinge. This segmentation enables the foldable functionality while keeping each component simple in structure, resolving the contradiction between portability and complexity.
Solution Approach 2:
The hinge connection introduces dynamic capability to the structure, allowing the device to transition between folded and unfolded states. This dynamic element provides adaptability to various seating surfaces without requiring complex mechanical systems.
Data Source
Figure 1~2a
Figure 2b
Figure 3a~3b
AI summary
Seating device (1) comprising a base plate (2) for a user to sit on and a pelvic support (3) for supporting in a vertical position the pelvis of a user sitting on said base plate (2) without supporting or immobilising said user's vertebrae, wherein said pelvic support (3) is configured for contacting said pelvis (9) at the posterior superior iliac spines (PSIS) (91) and/ or at the iliac crests (92), without any contact to said user's vertebrae wherein said seating device is configured for maintaining an angle of 93° to 97° between the vertically supported pelvis (9) and the femoral bones of said user. In embodiments, the seating device includes a mechanism to encourage the user's upper body mobility, for example a convex base.