Ball Joint Back Support with Rotatable Hip Brackets
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Solution Overview
Problem
Existing standing frames lack precise control over a person's position, particularly in adjusting the pelvis for correct alignment and stabilization in both sagittal and coronal planes, and providing adequate support during transitions between horizontal and vertical positions.
Innovation Solution
A back support system with a ball joint mechanism and rotatable hip supports, allowing for adjustable tilt and rotation to correct pelvis alignment, combined with U-shaped brackets and washers for secure attachment, enabling precise positioning and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed back support structure is used, then the device complexity is reduced, but the ability to precisely control and correct pelvis positioning is compromised
Solution Approach 1:
The back support structure incorporates dynamic elements including a ball joint mechanism that allows rotational movement and adjustable hip supports that can be positioned at different angles. This enables the structure to adapt to various pelvis positions and provide precise control while maintaining reasonable structural complexity through controlled mobility rather than complete rigidity
Solution Approach 2:
The back support is divided into separate functional segments: a holder for attachment, a supporting plate, a carrying plate with ball joint, and individual hip supports on brackets. This segmentation allows each component to perform its specific function independently, enabling precise pelvis positioning through coordinated adjustment of multiple segments without requiring the entire structure to be overly complex
2Stability of the object's composition
If adjustable hip supports are added to correct pelvis alignment, then the stabilization capability is improved, but the device complexity increases
Solution Approach 1:
The hip supports are mounted on brackets with elongated arms that can rotate relative to an axis perpendicular to the supporting plate. This dynamic capability allows the hip supports to be adjusted to different angles to correct pelvis alignment and provide stabilization during transitions, while the rotation mechanism remains relatively simple compared to more complex adjustment systems
Solution Approach 2:
The hip supports serve multiple functions: they prevent sideways displacement of the pelvis, provide support and stabilization during vertical positioning in abduction, and can be adjusted to correct improper pelvis positioning. This multi-functionality achieves comprehensive pelvis stabilization without requiring multiple separate devices, thereby limiting the increase in overall device complexity
3Adaptability or versatility
If a ball joint mechanism is used for adjusting back support tilt, then the adaptability for correcting pelvis positioning is improved, but the device complexity increases
Solution Approach 1:
The ball joint acts as an intermediary mechanism between the carrying plate and the holder, facilitating adjustment of the back support in all planes. This single ball joint component enables the carrying plate to be tilted at any desired angle and allows correction of pelvis positioning in both the sagittal and coronal planes, providing high adaptability through one well-designed intermediary rather than multiple complex adjustment mechanisms
Solution Approach 2:
The ball joint mechanism utilizes spherical geometry to enable movement and adjustment in multiple planes simultaneously. This spherical articulation allows the back support to be tilted at any angle and rotated as needed for correcting pelvis positioning, providing comprehensive adaptability through the inherent properties of spherical motion rather than requiring separate adjustment mechanisms for each plane
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A back support for a standing frame, the back support (30) comprising: a holder (31) for attaching the back support (30) to the standing frame, the holder (31) having a ball stud (32) at its one end; a supporting plate (35); a carrying plate (34) attached at a first side of the supporting plate (35) and having a socket (33) housing a ball of the ball stud (32); a cushion (36) attached at a second side of the supporting plate (35); and hip supports (40, 50) mounted asides the supporting plate (35), each hip support (40, 50) being mounted on a bracket (41, 51), each bracket (41, 51) having an elongated arm (41A, 51A) parallel to the supporting plate (35) and rotatable relative to an axis (X1, X2) perpendicular to the supporting plate (35), wherein each hip support (40, 50) has a main plane (40A, 50A) arranged perpendicularly to its elongated arm (41A, 51A).