Nokia Corporation

Nokia Mobile Phones Limited

Tomi Kanninen

Ilpo Kalevi Kauhaniemi

Matti Kosonen

Pekka Hakanen

Antti R&ouml;nkk&ouml;

Eero Maki-Tulokas

Eero M&auml;ki-Tulokas

Juha Sormunen

The invention relates to an electromechanical structure of an extendable electrical device comprising a body part ( ) and a sleeve-like grip part ( ). The smooth longitudinal movement between a retracted and extended position is effected by a clockspring in a spring barrel ( ). A belt is wrapped around the barrel, and a slide part ( ) is attached to the free end of the belt. When the device is retracted, the slide part with the belt slides along a longitudinal groove ( ) made on at least one side of the body part until the slide part is interlocked. In response to pushing a releasing element, the interlocking is released, whereupon the belt is wrapped around the barrel and the body part slides smoothly to extended position.

Two-part device

A housing or decorative cover for a mobile communication device is constructed by impact extrusion of metal. The impact extrusion die and punch are designed to provide attachment ridges and slots for ease of assembling the cover to the device. To provide a final shape and finish the impact extruded metal cover is drawn through a drawing stone.

Method of manufacturing a cover for communication devices

Growing community of inventors

Salo, Finland

Tomi Kanninen