US 6,672,906 B1 · Jack device

Abstract

A jack device which does not malfunction because of overcurrent in an apparatus or a device that is connected to the jack device by preventing short-circuit between contacts in inserting a plug. The jack device, into which a single-head plug (50) having plug poles in the direction of insertion is inserted for connection, has a contact piece (11) that is arranged at the end of plug (50) and brought into contact with a first plug pole (plug pole 54) and contact piece (10) that is arranged neighboring the first plug pole and brought into contact with a second plug pole (plug pole 52). To widen the spacing between the two plug contact pieces (11), (10) in the direction of plug insertion, the spacing D between the plug connecting parts (11p), (10p) of both contact pieces (11), (10) is almost equal to or greater that the length L of the first plug pole (plug pole 54), so that when the first plug pole (plug pole 54) contact with the inside contact piece (11), the contact piece (10) on the inlet side contacts with the second plug pole (plug pole 52).

Claims12

Dependent claims

A jack device having a jack section into which a single-head plug having plural plug poles in the direction of insertion is to be inserted, wherein the jack section comprises:

an elastically deformable first contact piece that is brought into contact with a first plug pole disposed at the front end of said plug;
an elastically deformable second contact piece that is brought into contact with a second plug pole disposed adjacently to said first plug pole;
and
a hollow holder for affixing said first contact piece and said second contact piece in the direction of insertion of a plug, said hollow holder having a notch formed for avoiding at least said second contact piece;
and the spacing between said first contact piece and said second contact piece of said jack section is made equal to or greater than the length of said first plug pole in the direction of plug insertion,
wherein a portion of said first contact piece overlaps a portion of said second contact piece when viewing a cross-section of said jack section taken along the direction of plug insertion.

3 more elements

Dependencies are inferred from the claim text.

Jack device

Life of this patent

Jack device

Life of this patent

Abstract

Claims12