Monday, April 21, 2008

Cans Poka Yoke

I found a can with an old design during one of my recent travels... this has been modified for a long time in most countries so that when you open a can, you cannot get cut with the seperate metal pull tab anymore.

Old bad design found in Hong Kong

The recent classical design

There is another problem, in the new design the tab is moving inside the can and comes in contact with the beverage, a potential hygiene/safety issue because the cans are not that clean... I found an example in Italy where they have a solution for this:

Ethernet Poka Yoke

This is an interesting example of mistake proofing for a simple connector: the well-known ethernet cable connector... as many other people around the world, you probably have broken the small plastic piece clicking into the female connector to secure the connection. This is a major design flaw because those things break too easily if you move the cable...
I just found a new type of cable with a simple mechanical protection avoiding the issue. I am traveling a lot with such a cable and I broke a few of them very quickly... I am now using the new design for months, not a problem.

The old design (broken)

The better design