Nokia Mobile Phones Limited

Matti J Saarela

Lasse J Uronen

Heikki A Salo

A procedure for manufacturing a radio telephone chassis and for mounting circuit boards on the chassis, and a radio telephone chassis produced according to the procedure. The chassis is made from a sheet metal blank by suitably die cutting and bending it into a box-shaped body, the circuit boards attached thereto constitute one set of walls. Before mounting the circuit boards, the metal board is coated with a thin layer of tin.

Procedure for manufacturing a radio telephone chassis and a chassis

The present invention concerns a shell structure for a radio telephone. The shell comprises three parts: a box-like part or base (1), a cover part (3), and a locking part (4) having flexible tongues. A finished tested radio telephone unit may be disposed in the box-like base (1), whereafter the cover part (3) is fixed to the base with a small longitudinal movement, and finally, the locking part tongues are depressed into grooves of the base, in which the tongues become locked, locking simultaneously the cover part (3) to the base. The shell structure enables mounting without using screw connectors, whereby the assembly of the shell structure may be automated.

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Halikko, Finland

Matti J Saarela