Single-Arm Wheelchair Attachment With Adjustable Actuator Arms
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Solution Overview
Problem
Standard wheelchairs require both hands to maneuver, making it difficult for individuals with hemiplegia to operate them independently and for those who cannot afford or access electronic wheelchairs.
Innovation Solution
A universal wheel attachment that allows secure mounting to most wheelchair models using a U-Bolt or J Hook system, enabling single-arm operation through pivotally connected and removably coupled actuator arms with a connecting cross bar or spring-loaded handle sleeve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard wheelchair design is used, then manufacturing simplicity and cost-effectiveness are maintained, but accessibility and ease of operation for single-arm users deteriorates
Solution Approach 1:
The attachment device is divided into separate modular components including actuator arms, cross bars, mounting brackets, and connection mechanisms that can be independently assembled and configured. This segmentation allows the complex functionality to be achieved through simple, discrete parts that maintain ease of assembly and operation.
Solution Approach 2:
The attachment system incorporates movable and adjustable components such as extendable actuator arms, rotatable connection joints, and adaptable mounting mechanisms. These dynamic elements allow the device to adjust to different user needs and wheelchair configurations while maintaining operational simplicity through intuitive mechanical adjustments.
2Ease of operation
If electronic wheelchairs are used, then ease of operation for single-arm users is improved, but accessibility due to cost and insurance limitations deteriorates
Solution Approach 1:
The attachment device is designed as a self-contained mechanical system that users can install and operate themselves without requiring electronic systems, specialized training, or complex assembly procedures. The purely mechanical nature of the device allows users to manually adjust and operate it independently, eliminating dependency on expensive electronic controls.
Solution Approach 2:
The attachment system uses simple, inexpensive mechanical components that can be manufactured at low cost using basic materials and production methods. The design prioritizes cost-effectiveness over durability, accepting that the attachment may need replacement rather than investing in long-lasting electronic systems that are prohibitively expensive for many users.
3Adaptability or versatility
If fixed-length actuator arms are used, then device simplicity is maintained, but adaptability to users of different sizes deteriorates
Solution Approach 1:
The actuator arms incorporate extendable mechanisms that allow users to adjust the length according to their arm size and reach requirements. This dynamic adjustment capability enables the same device to accommodate users of different heights and arm lengths while maintaining relatively simple construction through basic telescoping or sliding joint mechanisms.
Solution Approach 2:
The device allows users to modify physical parameters such as actuator arm length and connection point positions to match their individual body dimensions. These parameter adjustments are achieved through simple mechanical means like adjustable joints, sliding connections, or interchangeable components rather than complex electronic controls, thereby increasing adaptability without proportionally increasing device complexity.
Data Source
AI summary
A wheelchair attachment for locomotion designed to allow a user with one arm to operate the wheelchair. The wheelchair attachment comprises of a wheel adapter and two single arms which may be connected to each other with a spring-loaded cylindrical handle sleeve. The length of the arms may be adjusted to suit the needs of the user.