Wheelchair dimensions

Explanation//
Fixation prototype 44

To fix our final prototype to the wheelchair, we have to design a good fixation system. Till now, we used simple zip-ties (see prototype 44) to fasten it to the chair.
We made a sketch with the relevant dimensions of the chair in order to design the right fixation system.

There's enough space at the end of the left arm to place the final prototype.

Feedback 18/03

We particulary presented our two last prototypes, and explained their evolution.

Prototype 34:

The leash has to be stiff and flexible at the same time, because the loop has to slide easily to lock and unlock the dog. The iron wire has to come off, because it causes too much friction.
Other alternatives:

• iron wire inside the rope
• rubbery leash
• look up different kind of plastics
• reinforce only one small part of the collar
• (using a ring in stead of small loop, that slides over the leash)

advantages of this prototype:

• playful (for the dog)
• simple 

Prototype 35:

Remarks:

How will the the iron part of the collar stay in the back of the neck of the dog:
There already exist collars that contain an iron chain that can be the weight we need
to keep this part of the collar down. (this needs to be tested)
We can also use this mechanism to improve our prototype in an other way:
When to leash is not stretched, the dog can easily put his head through the collar,
because the loop can become wider.

Also we need to test multiple magnets.

They can't be too strong or too weak: http://www.supermagnete.de/eng/

Think of different ways to make the iron surface on the collar bigger and comfortable for the dog.
For example: a collar that is build out of segments.

Prototype 24

Measuring distances for the postition of the V-slot, and the length of the leash.

VISUALIZATION //

EVALUATION & CONCLUSION //

The dog has to be able to go in front of the wheel chair , and to the back of the wheel chair
for example to pick something up.
The most used length for a leach is about 50 cm.

In this respect, positioning the V-slot in the middle of the side-panel of the wheelchair is the best option.
But it can't be on the side of the joystick.

We have to find a prototype that takes as little space as possible, next to the wheelchair.
Because people need those space to manouvre in narrow passages.
( a standard has a width of 80cm, adapted doors have a width of 90cm )

The ideal height of the V-slot was about 62 cm.