Protecting device against interfering electromagnetic radiation comprising EMI-gaskets
AssigneeNokia Corporation
InventorReijo Nurmi
Life of this patent
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Abstract
The object of the invention is a device and an elongated EMI gasket (20), made from an electroconductive wire, used for its EMI screening (electromagnetic interference). It is characteristic of the EMI gasket that it comprises a groove substantially parallel to the longitudinal direction of the EMI gasket for receiving a piece or its part (43) inside the EMI gasket (20). The piece to be protected against interfering electromagnetic radiation is EMI screened by pushing the EMI gasket (20) against the edge of the piece and by arranging contacts through the EMI gasket between the piece and some electroconductive surface that is close to it.
Claims13
An elongated EMI (electromagnetic interference) gasket (20, 50, 60), characterised by the EMI gasket (20, 50, 60) being made from an electroconductive wire bent in a spring-like shape such that the EMI-gasket comprises:
- a longitudinal portion formed by said wire, the portion being parallel to the longitudinal direction of the EMI gasket, and
- a groove substantially parallel to the longitudinal direction of the EMI gasket, the groove being adapted to receive a piece or a part of the piece (23, 34, 43, 53, 55, 63) inside the EMI gasket (20, 50, 60).
A device that comprises a first part (21, 32, 61) and a second part (22, 31, 62) joined together and an elongated EMI gasket (20, 60) for getting said first part (21, 23, 32, 61) and said second part (22, 31, 62) into contact and for preventing electromagnetic interference from passing through the joining point between the first and the second part, characterised by the EMI gasket (20, 60) being made from an electroconductive wire bent in a spring-like shape such that the EMI gasket (20, 60) comprises:
- a longitudinal portion formed by said wire, the portion being parallel to the longitudinal direction of the EMI gasket, and
- a groove substantially parallel to the longitudinal direction of the EMI gasket, the groove being adapted to receive at least one of said first and second parts (23, 34, 43, 53, 55, 63) inside the EMI gasket, and wherein:
- the EMI gasket (20, 60) is in contact with both said first part and said second part for forming an electrical contact via the EMI gasket between said parts (21, 22;
- 32, 31;
- 61, 62).
A device that comprises a first part (41), a second part (42) and a third part (43), joined together, and in between them an elongated EMI gasket (20) made from a conductive wire for getting said parts into contact with each other and for preventing electromagnetic interference from passing through the joining point between said parts (41, 42, 43), characterised by
- the EMI gasket (20) being in contact with said first part (41) and said second part (42) and by
- the EMI gasket (20) being made from an electroconductive wire bent in a spring-like shape such that the EMI gasket (20) comprises:
- a longitudinal portion formed by said wire, the portion being parallel to the longitudinal direction of the EMI gasket, and
- a groove substantially parallel to the longitudinal direction of the EMI gasket, the groove being adapted to receive said third part (43) at least partly inside the EMI gasket (20), and wherein:
- said groove is bordered by a first edge, which is in contact with said third part (43) to form an electrical contact between said first part (41), said second part (42) and said third part (43).
Dependencies are inferred from the claim text.