Split Seat Coupling for Natural 3D Pelvic Movement
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Solution Overview
Problem
Conventional seats restrict the natural three-dimensional movement of the pelvis, leading to premature wear and degeneration of intervertebral discs and back pain, as they block translational and rotational degrees of freedom when transitioning from walking to sitting.
Innovation Solution
A seat device with two independently movable seat halves and a coupling device that allows for translational movement in all spatial directions and rotation about all axes, incorporating elastic and/or damping elements to mimic the natural pelvic movement, along with adjustable mechanisms for varying distances and inclinations to accommodate individual anatomies and needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional seats are used, then the seat structure is simple and stable, but the natural three-dimensional movement of the pelvis is restricted
Solution Approach 1:
The seat is divided into two independent seat halves (5a, 5b) that can move separately, allowing the pelvis to move three-dimensionally while maintaining structural support. Each seat half is connected to the intermediate piece via coupling devices that enable independent movement in all spatial directions and rotations about all spatial axes.
Solution Approach 2:
The coupling device incorporates elastic and/or damping elements (12) that allow dynamic movement of the seat halves, enabling the seat to adapt to natural pelvic movements during walking and sitting transitions while providing support when needed.
2Reliability
If conventional seats block translational and rotational degrees of freedom, then the seat structure is simple, but premature wear and degeneration of intervertebral discs occurs
Solution Approach 1:
The coupling device allows dynamic movement of the seat halves, enabling the pelvis to maintain natural movement patterns during sitting and walking transitions. This prevents the blockage of translational and rotational degrees of freedom that would otherwise cause premature wear and degeneration of intervertebral discs.
Solution Approach 2:
The elastic and damping elements in the coupling device allow the seat to change its mechanical parameters dynamically, providing support when needed while allowing natural movement when appropriate, thereby protecting intervertebral disc health.
3Adaptability or versatility
If the seat halves are connected rigidly, then the seat structure is stable, but natural pelvic movement is restricted
Solution Approach 1:
The coupling device connects the seat halves in a dynamically stable manner, allowing natural pelvic movements while maintaining structural integrity. The elastic and damping elements provide stability during movement while preventing excessive or harmful motions.
Solution Approach 2:
The connection between seat halves changes its mechanical parameters dynamically, providing stability when needed while allowing movement when appropriate, thus resolving the contradiction between stability and movement freedom.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The seat device enables unrestricted three-dimensional pelvic movement, replacing negative loads with dynamic movements that correspond to walking, promoting comfort, mobility, and well-being by maintaining natural spinal curvature and reducing pressure on intervertebral discs.
Implementation Method 1
The at least one elastic and/or one damping element (12)
Implementation Method 2
The at least one elastic and/or one damping element (12)
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
The invention relates to a seat device (1), consisting of a foot part (2), an intermediate piece (3) that is connected to the foot part, and a seat (4) that is connected to the intermediate piece (3) and is formed by two individual seat halves (5a, 5b), wherein the seat halves can be moved independently of each other, a coupling device (5) is arranged between the seat (4) and the intermediate piece (3), and the seat halves (5a, 5b) can be moved horizontally in a translatory manner by means of the coupling device.