Patent ID: 6081067
Filing Date: 2000-06-27
Classification: H01J,Y02B

Abstract:
Plastic housing and screw base construction for compact fluorescent lamps and electrical operating units thereof comprising a base (2) including a metal screw base shell (20) having a thread-free opening portion (22); a plastic housing (1) having a neck part (10) being a body of rotation with central axis (O); said neck part comprising a cylindrical or slightly conical mantle portion (12) starting from a stop shoulder (11) and a shell (13) connecting to said mantle portion (12) and having an open end and diameters decreasing at least in one step; said base (2) being pushed over and fixed to said neck part (10) of said plastic housing (1); a lead wire (3) being passed through from the inner space of said plastic housing (1) between said thread-free opening portion (22) of said base shell (20) and said mantle portion (12) of said neck part (10); wherein a rib (14) protruding in and having a front surface (15) perpendicular to radial direction is formed on said mantle portion (12); a slot (16) extending parallel to said central axis (O) and having a depth suitable for accepting a portion (30) of said lead wire (3) leaving said plastic housing (1) is indented into said front surface (15); a local protrusion (21) having an inner size and shape fitting to said rib (14) is made in said thread-free opening portion (22) of said base shell (20); said portion (30) of said lead wire(3) is placed in said slot (16), the end of said lead wire (3) is bent back towards the end of said base (2) and is fixed to said base shell (20) by resistance welding with a compression force exerted radially from outside.