Passive Limb Motion Supports With Screwless Rotation Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing muscular relaxation and stimulation devices have fixed support configurations that are uncomfortable and ineffective for different anatomical positions, suffer from poor rotation and fixation systems that deteriorate over time, and lack versatility in motion range and accessibility for users, particularly those in wheelchairs.
Innovation Solution
The device features exchangeable padded supports, a robust rotation mechanism without screws, adjustable height, and structural enhancements for wheelchair accessibility, along with extendable and removable components to accommodate various positions and motions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed configuration supports are used, then the device structure is simple, but the comfort and effectiveness for different anatomical positions deteriorates
Solution Approach 1:
The support structure is segmented into a reusable framework and interchangeable padded supports. The padded supports can be removed and replaced with different configurations to match various anatomical positions, allowing the system to adapt without requiring a completely different device structure for each position type.
Solution Approach 2:
The device incorporates adjustable components including a rotatable box that can be positioned at different angles and a height-adjustable tilting frame. These dynamic adjustment mechanisms allow the same physical structure to accommodate multiple anatomical positions and user needs effectively.
2Reliability
If screw-based rotation and fixation systems are used, then the pitch adjustment is precise, but the system reliability deteriorates over time due to vibration
Solution Approach 1:
The problematic screw-based fixation system is extracted and replaced with a different mechanism. The patent uses a rotation mechanism with a disc and radial slots that engages with a pin or protrusion, eliminating the need for screws and providing a more vibration-resistant fixation method that maintains reliability over time.
3Adaptability or versatility
If exchangeable padded supports are included, then the adaptability to different positions is improved, but the device complexity increases
Solution Approach 1:
The padded supports are designed as universal interchangeable components that can be used with the same framework structure. Multiple pad configurations can be attached to the standardized support framework, allowing one base structure to serve multiple functions and positions while maintaining manageable complexity through standardization.
4Ease of operation
If the box is fixed to the tilting frame, then the structural stability is improved, but the ease of adjustment for different positions deteriorates
Solution Approach 1:
The connection between the box and tilting frame is designed to be dynamically adjustable. The box can be rotated to different angles and locked into position using the rotation mechanism, while the entire assembly can be adjusted in height and tilt angle. This allows the structure to be stable when locked but easily reconfigured when needed.
Data Source
AI summary
Extremities passive motion device for muscular recovery, relax or stimulation with a framework (2) with two supports (3) for the extremities of the user, and driving means (20), that move them in a to and fro horizontal motion in opposite directions on the axis (24) of a box (4) to which they are joined, which is joined in a rotating manner by its ends to side arms (5a) of a tilting frame (5), where the supports (3) are parts with withdrawable and exchangeable pads (8, 8′, 8″, 8″′); a rotation mechanism (9) is provided, of the box, that can be driven by a handle (10) the box (4) is withdrawable and a structure of rails (16) is provided that can be docked to the framework (2) for wheelchairs.