US 5,670,925 AGranted

Bobbin, bobbin and core assembly, and inductor coil assembly for electronic ballast

AssigneeOsram Sylvania Inc.

InventorMichael J. Gibbs

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Abstract

A bobbin and core assembly includes a bobbin for supporting a pair of discrete windings. The bobbin includes a central body, first and second inner flanges fixed to first and second ends of the body, first and second tubular portions extending outwardly from the first and second inner flanges, first and second outer flanges fixed to outer ends of the first and second tubular portions, the inner and outer flanges defining first and second channels for receiving first and second of the windings. The assembly further includes first and second outer core members, each having a core portion extending from a base portion and between two leg portions generally parallel with the outer core member core portion, and first and second inner core members each having a core portion extending from a base portion and between two leg portions. The first outer flange, first tubular portion and first inner flange define a first tunnel in which is disposed the first outer core member core portion and the second outer flange, second tubular portion, and second inner flange define a second tunnel in which is disposed the second outer core member core portion. The central body of the bobbin is provided with an opening extending widthwise therethrough and in communication with the tunnels. The first and second inner core members are disposed in the central body opening with the first and second inner core member core portions disposed in the first and second tunnels.

Claims18

Dependent claims

A bobbin and core assembly comprising:

a bobbin for supporting a pair of discrete windings, said bobbin comprising:
a central body having first and second ends;
first and second inner flanges fixed, respectively, to said first and second ends of said central body;
first and second cylindrically-shaped tubular portions extending, respectively, outwardly from said first and second inner flanges and in axial alignment with said central body;
first and second outer flanges fixed, respectively, to first and second outer ends of said first and second tubular portions;
said inner and outer flanges defining first and second channels for receiving first and second of said windings upon, respectively, said first and second tubular portions;
first and second outer core members, each having an outer core member core portion extending from an outer core member base portion and between two outer core member leg portions generally parallel with said outer core member core portion;
and
first and second inner core members each having an inner core member core portion extending from an inner core member base portion and between two inner core member leg portions generally parallel with said inner core member core portion;
said first outer flange, said first tubular portion and said first inner flange defining a first tunnel in which is disposed said first outer core member core portion, and said second outer flange, said second tubular portion, and said second inner flange defining a second tunnel in which is disposed said second outer core member core portion;
said central body of said bobbin being provided with opening means extending widthwise therethrough and in communication with first and second inner openings of said first and second tunnels, respectively;
said first and second inner core members being disposed in said central body opening means with said first and second inner core member core portions being respectively disposed in said first and second inner openings and said first and second tunnels;
ends of said first and second inner core member core portions respectively abutting ends of said first and second outer core member core portions.

10 more elements

An inductor coil assembly comprising:

a bobbin comprising:
a central body having first and second ends;
first and second inner flanges fixed, respectively, to said first and second ends of said central body;
first and second cylindrically-shaped tubular portions extending, respectively, outwardly from said first and second inner flanges and in axial alignment with said central body;
first and second outer flanges fixed, respectively, to first and second outer ends of said first and second tubular portions;
said inner and outer flanges defining first and second channels, respectively, around said first and second tubular portions;
first and second outer core members each having an outer core member core portion extending from an outer core member base portion and between two outer core member leg portions generally parallel with said outer core member core portion;
and
first and second inner core members each having an inner core member core portion extending from an inner core member base portion and between two inner core member leg portions generally parallel with said inner core member core portion;
said first outer flange, said first tubular portion, and said first inner flange defining a first tunnel in which is disposed said first outer core member core portion, and said second outer flange, said second tubular portion, and said second inner flange defining a second tunnel in which is disposed said second outer core member core portion;
said central body of said bobbin being provided with opening means extending widthwise therethrough and in communication with first and second inner openings of said first and second tunnels, respectively;
said first and second inner core members being disposed in said central body opening means with said first and second inner core member core portions being respectively disposed in said first and second tunnels, ends of said first and second inner core member core portions respectively abutting ends of said first and second outer core member core portions;
a first winding disposed on said first tubular portion and in said first channel;
and
a second winding disposed on said second tubular portion and in said second channel.

12 more elements

Dependencies are inferred from the claim text.