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US 6,271,742 B1Granted
Mains adapter and method for its production
AssigneeAspro Technology AG
InventorMichael Graf
Life of this patent
Estimating the term…
Abstract
The iron core (2) and the windings (3, 4) of a transformer (1) are held together by a coil former (21) which is arranged in an injection mould in such a way that it comes into contact with said mould only with small parts at its surface, whereas the transformer (1) is a distance away from its walls. A plastic shell (22) is then moulded on to complete a small and light integral casing (7) enclosing the transformer all round and in an abutting manner. Joints between the coil former (21) and the shell (22) are essentially at the bottom of indentations which separate cooling fins (20).
Claims43
A mains adapter comprising:
- a transformer having an iron core, a primary winding and a secondary winding;
- a plurality of primary electrical connections conductively connected to the primary winding of the transformer;
- a plurality of secondary electrical connections conductively connected to the secondary winding of the transformer;
- and
- a plastic casing completely enclosing the transformer in an abutting manner permitting only the primary electrical connections and the secondary electrical connections to extend through the casing.
2 more elements
A mains adapter comprising:
- a transformer having an iron core, a primary winding and a secondary winding;
- a plurality of primary electrical connections conductively connected to the primary winding of the transformer;
- a plurality of secondary electrical connections conductively connected to the secondary winding of the transformer;
- an integral plastic casing completely encapsulating the transformer in an abutting manner permitting only the primary electrical connections and the secondary electrical connections to extend through the casing;
- and
- wherein the casing includes a coil former supporting the iron core, the primary winding and the secondary winding of the transformer, and a shell covering at least one portion of an outer surface of the transformer, and the outer surface of the casing is formed at least partly by the coil former.
3 more elements
A method for producing a mains adapter comprising the steps of:
- providing a transformer having an iron core, a primary winding, and a secondary winding;
- providing a plurality of primary electrical connections conductively connected to the primary winding of the transformer;
- providing a plurality of secondary electrical connections conductively connected to the secondary winding of the transformer;
- providing a coil former configured for supporting the iron core, the primary winding and the secondary winding of the transformer;
- providing an integral shell shaped for covering at least one portion of an outer surface of the transformer;
- arranging the transformer and the coil former in an injection mould while the coil former supports the iron core, primary winding and secondary winding of the transformer;
- and
- moulding the integral shell onto the transformer and the coil former to form an integral plastic casing completely enclosing the transformer in an abutting manner permitting only the primary electrical connections and the secondary electrical connections to extend through the casing.
5 more elements
A mains adapter having a transformer which includes an iron core, a primary winding, a secondary winding, comprising:
- an integral plastic casing completely enclosing the transformer in an abutting manner, so as to permit only contact elements and connections to extend through the casing and connect to the transformer;
- wherein the connections comprise at least one primary connection and at least one secondary connection separated from the at least one primary connection by a partition, the connections being concealed by a cover having an opposite wall extending parallel to a side surface of the partition and spaced a small distance away from the side surface of the partition so as to overlap with the side surface of the partition.
A mains adapter comprising:
- a transformer having an iron core, a primary winding and a secondary winding;
- a plurality of primary electrical connections conductively connected to the primary winding of the transformer;
- a plurality of secondary electrical connections conductively connected to the secondary winding of the transformer;
- an integral plastic casing completely enclosing the transformer in an abutting manner permitting only the primary electrical connections and the secondary electrical connections to extend through the casing;
- a cover supported on the casing to conceal the secondary electrical connections;
- and
- wherein the secondary electrical connections comprise first and second secondary connections each conductively connected to the secondary winding and extending away from the same side of the casing.
4 more elements
Dependencies are inferred from the claim text.