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Project 9: Adaptive Walker, Smaller

Abstract

This project involves designing a lightweight, adjustable, custom walker, similar to a gait trainer, for a 2-year old girl with Cerebral Palsy.  The walker must be easy for her to move around and include a harness so that she will not be able to fall while using the walker.  The walker also needs to include an entertainment tray that allows her to eat and play while using the walker.

 

Charlie Ledford, Alex Harrison, Mason Reid, Joel Roberson

Problem Statement

The problem our team will be solving for this project will be designing and building a small walker to help a 2-year old girl with Cerebral Palsy walk around.  She has tried other walkers before, but the main problems that she runs into when using these walkers is 1. She is unable to move the walker around, and 2. She uses her arms to hold herself up on the walker so that she is not using her legs to move around.  Because of these problems, our team is tasked to design a small walker that is lightweight and easy for her to move around in, and has better arm support so that she does not feel inclined to try and hold herself up as much when moving around.  Also, the walker needs to be able to allow her to easily hold herself upright without requiring her to grip onto things because she has a hard time gripping onto things.

Design Specifications

Because of her condition, there are many specific design specifications and safety considerations that must be applied to this project to insure a safe and easily usable experience.

Design Specifications:

  1. Lightweight and easy to move around in
  2. Does not allow her to fall backward out of the walker, or any other direction
  3. Needs to be moveable on hardwood floors
  4. Must be able to support her weight and height of 21 Lbs and 32.09 in.
  5. Adjustable design that allows her continued use of the walker as she gets older
  6. Entertainment tray that allows her to play with toys or eat while using the walker

 

Background Research

Cerebral Palsy is a congenital disorder due to abnormal brain development before birth.  The main symptoms of this disorder include exaggerated reflexes, floppy or rigid limbs, and involuntary motions.  Because of these symptoms, young children with Cerebral Palsy often have a hard time walking without a walker, and traditional walkers usually do not provide enough support or features for them to take advantage of.  Here are a couple of walker designs meant specifically for children with Cerebral Palsy that our team has taken some inspiration from.  The main features from these walkers that we want to implement in our walker are the harness system that helps to secure the child to the walker, and the adjustable height that can be seen in the second picture with the hand screw.

 

Concept Design 1

This design is a multi-functional device designed to be a walker and standing device. The child is not strong enough to walk or support her full weight, and this is designed to help incrementally load her full weight onto her legs. The seat of the chair can be angled to allow her to rest some of her weight on the chair while allowing her legs to support her as well. the frame would be made out of aluminum allowing for it to be very lightweight and mobile. The tray, seat of the chair, and armrests would all be able to be removed and replaced with ease allowing for plenty of room for the child to grow and the walker to adapt.

 

Concept Design 2

 

This concept is based on the design of a traditional walker but implements some specific design elements to support and grow with her properly. This includes adjustable legs and locking wheels to change as she grows and allow it to be stationary if needed. It also includes a removable tray, seat, arm braces, and back brace. These provide her with an area to use if needed, a seat to rest or to support her, the arm braces ensure that she does not have to grip the walker, due to weaker grip strength and the back brace keeps her from falling and allows partial support if needed while walking. This will also be made of aluminum and other lightweight materials to ensure she can move the implement.

 

Concept Design 3

This design primarily takes structural integrity and safety into mind.  The two circular rings used to connect the four legs provide ample structural support for the walker and the child in the seat, and they also prevent the child from possibly falling over.  The legs are also spread out in order to minimize the risk of the walker falling over while the child moves the walker around.

 

Selected Concept Design

Based on our decision matrix, our selected concept design to move forward with is Concept 2.

 

Decision Matrix

Semester

2024 Spring