Our design consists of three parts: an upper arm, a forearm, and a bow holder.
The first part is the upper arm attachment. It is made of 70% plastic and 30% elastic material. The design of that part includes extra spacing for the inner padding to provide stability and comfort. This part is used to distribute the force from the forearm to the upper arm
The second part is the forearm attachment. It also takes into account extra spacing for the inner padding. To account for the lump that our client has on her forearm, there is an opening to avoid discomfort and pressure on this area.
In both parts, the forearm and the upper arm, there is an attachment mechanism that will hold them together. Three notches were added to both sides of each part, where they will be connected using a hard rubber material. This will provide comfort in terms of moving the forearm left and right as well as distributing force onto the upper arm.
The third part is made of three components. The first component is the rod attachment, and it is connected to the second component, the U-shaped structure, using a push and lock mechanism. This will allow for different uses of the prosthetic, by making the tips interchangeable depending on the desired activity.
The second component is the U-shaped structure that rotates 360⁰ in the counter clockwise direction with respect to the rod. It has a permanent locking mechanism that will lock it into 36 different angles. When the permanent lock is not being used, the rotation of the U-shaped component will be locked in the counter-clockwise direction, but it can rotate freely in the clockwise direction. This will be accomplished using a gear locking mechanism.
The third component is the part that is attached directly to the bow. It will hold the bow and provide rotation up to an angle of 90⁰ – 250⁰, which is dependent on how the bow is attached. The rotations provided by the U-shaped part and the bow holder will give our user more control of the bow, which will allow her to play properly.
