For our key functional prototype, we intended to create the legs of the chair, but we found it hard to fold the legs and find the desired height. So instead, we created the pocket of our chair cape. For this prototype, we sewed the navy blue canvas fabric together to make a separate pocket that would zip up. We plan to sew the pocket on to the chair cape later on our final prototype.
After making the pocket for our key functional prototype, we continued to make a complete next prototype. We decided that the most important issue to address with this prototype was to create a functional leg design at the desired height of 19-20 inches. Since we needed a material that was sturdy enough to stand on its own, we decided to build this prototype out of foam. We cut the legs, back frame and armrests out of foam then stuck pencils into the foam to make hinges. To attach the armrests to the back frame, we used cardboard as hinges. Then, we used the same black animal print for the fabric of the chair and back as well as the chair cape, and attached the chair cape with velcro. Since our airplane release straps have not come yet, we used the same backpack straps as our first prototype for this one. Lastly, we realized that the chair must be higher, so we added removable chair extensions with mini square foam pieces attached by bamboo skewers.
The class feedback for our functional legs was very useful. We were reminded to consider the cross body strap which would enhance usability by making it easier to take the backpack off. Once our airplane release straps come in, we can experiment with the cross body strap to see if it would work. A tradeoff to consider would be the adjustability of the telescopic legs to achieve the desired height or if the telescopic legs would make the backpack too bulky. In addition, the telescopic legs would add another element of complexity to using the chair. Another concern would be how to attach the armrests since our current armrests lie to the side of the chair backpack and could be awkward for the user. In addition, pushing down on the armrests would put pressure on our current hinges, so we need to figure out a sturdy way to attach the armrests.
Our plan for our second prototype due on November 16th is to get our three chairs ordered, then attempt to integrate the parts and possibly telescope the legs with Larry’s help. We are also waiting for our airplane release straps, so we can figure out the strap design.
But we are very excited for our three different chair designs to come in, so we can play around with them!
First, kuddos to you guys for making such progress on a difficult project. It is coming together really well and looks good so far, both aesthetically and progressively. I like the cross body idea. It seems more comfortable than the backpack straps. I wonder if it will change the balancing of the chair when you carry it, though.
I agree with Alex in being impressed by how much progress you guys are making and how you are coming up with such an innovative design. One thing you could consider is having the chair come in two different sizes. Shorter people can buy the one with the shorter legs, and taller people can get the one with the leg extensions.