Hemiplegic Forearm Recovery Device with Rotating Inner Frame
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Solution Overview
Problem
Existing hemiplegic forearm function recovery training devices face inefficiencies due to the varying shapes and conditions of patients' forearms, particularly with muscular atrophy, making mounting and training challenging, leading to decreased training efficiency.
Innovation Solution
A hemiplegic forearm function recovery training device with a forearm mounting part that includes a gripping mechanism, adjustable components, and a control system for rotational stimulation and resistance, allowing for easy mounting and effective muscle stimulation, featuring a rotary inner frame portion and a mounting body with ratchet mechanisms for secure fixation and adjustable grip positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual mounting of forearm on training device is performed, then secure fixation of forearm is achieved, but mounting time increases and training efficiency decreases
Solution Approach 1:
The device is divided into separate components: a mounting body for securing the forearm, an inner frame portion that rotates around the forearm, and an outer frame portion. This segmentation allows the forearm to be mounted once on the mounting body, while the inner frame portion can be independently adjusted and rotated, reducing repeated manual intervention and mounting time.
Solution Approach 2:
The mounting body is designed with universal adaptability to accommodate forearms of different shapes and sizes through adjustable pad portions and ratchet mechanisms. The inner frame portion serves multiple functions: it guides the forearm during rotation, provides structural support, and enables controlled movement for training. This multi-functionality reduces the need for multiple specialized components, streamlining the mounting process.
2Stability of the object's composition
If straight stretching of wrist is attempted for muscular atrophy patients, then proper positioning may be achieved, but mounting difficulty increases due to varying forearm conditions
Solution Approach 1:
The device incorporates dynamic adjustability through the inner frame portion that can rotate around the forearm and the pad portions that can be adjusted via ratchet mechanisms. This allows the mounting structure to adapt to different forearm shapes, sizes, and muscle conditions without requiring forceful straight stretching, making the mounting process easier while maintaining proper positioning.
Solution Approach 2:
The device allows changes in geometric parameters such as the rotation angle of the inner frame portion and the position of the pad portions through ratchet mechanisms. These parameter adjustments enable the device to accommodate various forearm conditions and shapes, reducing mounting difficulty while ensuring accurate wrist positioning for training effectiveness.
3Adaptability or versatility
If repeated manual training is performed by therapists, then personalized training can be provided, but physical burden on therapists increases
Solution Approach 1:
The device enables self-service training where the patient's forearm is mounted on the device and the training program is executed automatically through the control unit. The motor-driven rotation of the inner frame portion performs the repetitive training movements without requiring continuous manual intervention from the therapist, significantly reducing physical burden while maintaining personalized training protocols through programmable parameters.
Solution Approach 2:
The manual mechanical training action performed by the therapist is replaced by an automated motor system that rotates the inner frame portion around the forearm. The control unit programs the rotation parameters (speed, angle, duration) to provide personalized training, substituting the therapist's physical effort with an automated mechanical system that can consistently deliver customized training programs.
4Reliability
If various training devices are designed to accommodate different forearm conditions, then training effectiveness is improved, but device complexity increases
Solution Approach 1:
The device achieves universality through the mounting body with adjustable pad portions and ratchet mechanisms that can accommodate various forearm shapes and sizes. The inner frame portion serves multiple functions: structural support, rotation guidance, and training execution. This multi-functional design provides effective training for different forearm conditions without requiring multiple specialized devices, thereby controlling complexity.
Solution Approach 2:
The device uses dynamic components such as the rotatable inner frame portion and adjustable pad portions with ratchet mechanisms to adapt to different forearm conditions. Rather than designing separate static structures for each condition, the dynamic elements allow a single device structure to effectively accommodate variations in forearm shape, size, and muscle tone, maintaining training effectiveness while avoiding excessive complexity.
Data Source
AI summary
A hemiplegic forearm function recovery training device includes a forearm mounting part (2) on which a forearm (S) is to be mounted. The forearm mounting part (2) includes a mounting body (20), an inner frame portion (2B), an outer frame portion (2A), and a control part. The mounting body (20) has a forearm fixing portion (22) on which the forearm (S) is mounted and a gripping mechanism (23) capable of being gripped by a hand of the forearm (S). The inner frame portion (2B) is fitted to the mounting body (20) and is rotatable around the forearm (S). The outer frame portion (2A) guides the inner frame portion (2B) in a rotation direction thereof. The control part performs a series of controls that repeatedly causes normal rotation, stop, reverse rotation, and stop of the inner frame portion (2B) while acquiring rotation angle information of the inner frame portion (2B). In the normal rotation the control part controls angular velocity or acceleration of the inner frame portion (2B) to stimulate a training target muscle of the forearm (S) and in the reverse rotation the control part provides resistance to the inner frame portion (2B) to sustain stimulation to the training target muscle to maintain muscle tone.