Dieter Volkers' Door Claxon is a beautifully clever combination of a doorknob and a doorbell. Or rather, a doorhorn.
At first the Netherlands-based designer's handle looks like little more than whimsy, but look again. First, it's plain fun to have the horn honk through the handle, but then we see that the inside handle is also the perfect shape for a horn-speaker. Next, we notice that it is one-way: The inside handle will let people in, but the rubber bulb won't let you do any twisting or unlocking.
The inside of the Door Claxon is also nicely simple, comprising little more than a metal grommet, a bulb, a handle/horn and a metal "reed" to make the horn buzz. The only thing i don't like is the color. A pink ball like this is just too tempting for a childish mind such as mine, and pranksters would take a ball-pen and draw little curly hairs on it in no time.
Door Claxon [Dieter Volkers via Core77]
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