Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2001-07-24
2003-05-13
Martin, David (Department: 2841)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C320S112000, C307S150000
Reexamination Certificate
active
06563713
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a power supply unit for a portable game machine, and more particularly, to a universal power supply unit for the game machine model of Nintendo Game Boy Advance.
2. Description of the Prior Art
The Nintendo Game Boy machine is portable due to its small volume so that the Nintendo video games are widely popular. The current model of the game machine
1
(Game Boy Advance), as shown in
FIGS. 1 and 2
, has a battery chamber
11
at the bottom thereof in which two dry batteries
12
are received for supplying 3V DC voltage to the game machine. Besides, a cover
13
is engaged in the battery chamber
11
.
The power of the game machine
1
is much consumed so that two dry batteries
12
can only be used for few hours. After the batteries have run down, they have to be replaced, thereby causing a considerable cost. In order to resolve this problem, a power transforming unit
2
, as shown in
FIG. 3
, is installed in the battery chamber
11
in addition to the design of power supply by batteries. The power transformer
2
includes a transformer connector
21
which transforms the main power to 3V DC voltage which passes through a cover
22
engaged in the battery chamber
11
, utilizing the electric contact between the positive and negative output poles
221
at the side of the cover and the positive and negative poles
111
inside of the battery chamber
11
for supplying the required power to the portable game machine
1
.
However, the cover
22
and the transformer connector
21
of the power transformer
2
have special specification. In other words, the DC jack
222
on the cover
22
is only suitable for the connecting terminal
211
of the transformer connector
21
manufactured by Nintendo. Besides, the output of the transformer connector
21
is preset at 3V DC voltage. Thus, the inside of the cover
22
only has a filtering inductance L
1
and a diode D
1
. Therefore, the cover
22
doesn't fit other power supply units, for example, the DC 12V power supplied from the cigarette lighter in automobiles. Moreover, there are no mains sockets in automobiles for the transformer connector
21
. Thus, much inconvenience in use is still existing.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide a power supply unit for a portable game machine which is engaged in a cover of a battery chamber and contains a constant voltage loop. Besides, the power supply unit can be used in combination with commercially available transformers so that the convenience in use is much improved.
It is another object of the present invention to provide a power supply unit for a portable game machine in which the circuit devices have advantages of convenient assembly, stable structure and excellent electric contact.
REFERENCES:
patent: 5689179 (1997-11-01), Walker
patent: 5729448 (1998-03-01), Haynie et al.
patent: 5736833 (1998-04-01), Farris
patent: 6121753 (2000-09-01), Walker et al.
patent: 6329786 (2001-12-01), Ono
patent: 2002/0024327 (2002-02-01), Testin
Texas Instruments Publication TL 431,431A Adjustable Precision Shunt Regulators Specification vol. SLVS005M, Jul. 1978, Fig 24.
Levi Dameon E
Martin David
Rosenberg , Klein & Lee
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