Electrical adapter

Details Electrical adapter Electrical adapter

2001-10-09

2003-04-08

Vu, Hien (Department: 2833)

Electrical connectors

Connector movable between accessible and inaccessible positions

C439S172000, C363S146000

Reexamination Certificate

active

06544051

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to an electrical adapter, and more particularly to an electrical adapter for a Personal Digital Assistant (PDA).
2. Description of Related Art
A PDA generally has an electrical adapter for power supply. Referring to
FIGS. 6 and 7
, the conventional electrical adapter has a body (
80
) and a changeable plug (
81
). The body (
80
) has a connector (
801
) to connect with the PDA and a rotatable plug (
802
) provided therein and having two first blades for being inserted in an electrical supply socket. The rotatable plug (
802
) is pivotable between a concealed position in a channel of the body (
80
) and a protruding position projecting from the body (
80
). Two rods (
803
) are provided in the rotatable plug (
802
) and respectively electrically connected with the first blades. The changeable plug (
81
) has two passages (
811
) defined at a rear end thereof for receiving first blades of the rotatable plug (
802
) respectively and two cylindrical second blades (
812
) are provided at a front end of the changeable plug (
81
).
In use, the rotatable plug (
802
) is turned outwards 90 degrees from its concealed position to its protruding position to electrically connect the rods (
803
) with strips (
804
) in the body (
80
), and the first blades are directly inserted in the socket. When the electrical adapter is used for a different socket, the first blades are inserted in the passages (
811
) of the changeable plug (
81
) and the second blades (
812
) are inserted in the socket.
However, if the first plug (
802
) is turned less than 90 degrees and not to the full protruding position, as shown in
FIG. 8
, the rods (
803
) may be not electrically connected with the strips (
804
). Moreover, the first blades can not be inserted in the passages (
811
) completely, and it is possible that the rotatable plug (
802
) is not electrically connected with the changeable plug (
81
). When either of the above cases occurs, there is no electricity supplied in the PDA which results in confusion and irritation of a user.
Therefore, the invention provides an improved electrical adapter to mitigate and/or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main objective of the invention is to provide an electrical adapter which can be assembled with a changeable plug without necessarily having to turn a rotatable plug.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 5613863 (1997-03-01), Klaus et al.
patent: 5973948 (1999-10-01), Hahn et al.
patent: 6126460 (2000-10-01), Wu
patent: 6261109 (2001-07-01), Liu et al.

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