Nokia Corporation

Antti R&ouml;nkk&ouml;

Ilpo Kalevi Kauhaniemi

Matti Kosonen

Tomi Kanninen

Eero M&auml;ki-Tulokas

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

The invention concerns a spring barrel module having two chambers. A spring is located in the first chamber and a damper in the second chamber. The unidirectional damper is implemented by a clutch means that connects the damper plate to the spring shaft when the tightened spring is released, whereby the rotation of the damper slows down. Correspondingly, the clutch loosens the connection between the damper plate and the spring shaft when the spring is tightened. In low temperatures (e.g. below 0&deg; C. degrees) the damper fails to dampen the rotation. The unidirectional feature of the damper improves both usability and durability. Breakage of the mechanical components of the spring barrel is prevented by an overload clutch, which means that the spring barrel module will tolerate even relatively rough handling of the equipment.

Growing community of inventors

Espoo, Finland

Antti Rönkkö

Growing community of inventors

Espoo, Finland

Antti R&ouml;nkk&ouml;

Antti Rönkkö