Conclusion
To summarize, our design meets the key needs of Elsa and her family, as well as other children
with arthrogryposis who will use the system.
Our design includes the following parts:
● Door Assembly: A 53 inch long 15.5 inch wide structure composed of stainless steel and
engineering wood, designed to hang over Elsa’s bedroom door.
● Claw: Two 5 x 4 x 2.5 inch polystyrene claws connected to the door assembly with a
wooden frame, made to hold Elsa’s school uniform open at the start of the process as well
as release it down her back when activated.
● Pulley System: Two cardboard 5.5 inch diameter pulleys connected to the door assembly
with a wooden frame, made to easily release the shirt with a quick and easy tug of the
rope.
The design focuses on simplicity and ease of use. The design’s straightforward method can be
completed in approximately one minute. Based on the user observation and client interview, Elsa
has little trouble shimmying her shirt down once her head and arms are in the correct position.
Therefore, we designed our mechanism so that the entire process would occur while in this
position. The Shirt Horn’s unique setup on the claws allows for Elsa to easily fit her arms and
head into place to start the process. The pulley system enables the entire process to be completed
with one pull of a string. Finally, the door assembly ensures stability as well as a simple setup
for Mary. We also designed an undressing device. Details of the design are included, however
the prototype was never built.
The Shirt Horn is designed to assist Elsa in gaining more independence with her daily life by
putting on her shirt by herself.
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