Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1996-12-09
2003-03-18
Feild, Lynn D. (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C429S098000
Reexamination Certificate
active
06535378
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a portable computer of a type such that a display formed of a liquid crystal or the like is swingably attached to a system body which includes a body unit, containing a processor, RAM, peripheral circuits, etc., and a keyboard module and the like.
2. Description of the Related Art
In general, a small-sized portable computer called a notebook type comprises a body unit, which contains therein a processor, RAM, peripheral circuits, etc., a keyboard module and the like, and besides, a swingable cover member which is furnished with a liquid crystal display (LCD). Prevailing liquid crystal displays use a back-lighting light source, and include a straight-pipe discharge lamp for use as a light source element, besides liquid crystal cells, segment substrate, polarizer plate, glass plate, etc. Inevitably, therefore, the cover member must be considerably thick all over.
The cover member, having the aforesaid parts therein, is swingably supported at its proximal end portion on the system body by means of a hinge mechanism. Since the hinge mechanism also requires a substantial thickness for a satisfactory strength, the respective thicknesses of those portions of the cover member, including the hinge mechanism, are substantially equal to or greater than the thickness of the display portion of the cover member.
In the computer of the type described above, a battery pack which contains a plurality of batteries is used as an operative or backup power source. In some cases, the batteries in the battery pack may be arranged in two or three rows, depending on the capacity required of the whole battery pack, capacity and size of each battery, etc.
The battery pack, containing the batteries in this manner, requires a substantial thickness and width, so that how to arrange the battery on the system body exerts a great influence on the reduction of the overall size of the computer, especially the thickness.
Referring now to
FIGS. 49 and 50
, therefore, two examples of the conventional arrangement of the battery pack on the system body will be described.
In
FIG. 49
, numeral
201
denotes a system body, which houses a body unit
203
, which contains therein a processor, RAM, peripheral circuits, etc., a system control unit
203
′ including a keyboard module, track ball module, etc., and a battery pack
204
. The system control unit
203
′ is situated substantially right over the body unit
203
, while a hinge mechanism
206
for pivotally supporting a cover member,
202
is located over the battery pack
204
.
The battery pack
204
, which is arranged side by side with the body unit
203
, contains a plurality of (e.g., six) cylindrical batteries. In many cases, these batteries C
1
and C
2
are arranged in two rows, as shown in
FIG. 49
, in consideration of some restrictive conditions, including the size and capacity of each battery, length of the battery pack, etc. Naturally, therefore, the battery pack
204
has a height (thickness) not shorter than the diameter of each battery and a depth (in the horizontal direction of
FIG. 49
) twice the battery diameter or more. If the hinge mechanism
206
of the cover member
202
is situated right above the battery pack
204
, as shown in
FIG. 49
, therefore, the overall thickness of the computer is D
1
+D
2
, where D
1
and D
2
are thicknesses of the system body
201
and the cover member
202
, respectively.
With the recent technical innovation, the body unit
203
in the system body
201
and a liquid crystal in the cover member
202
have drastically been reduced in thickness. In consideration of the mechanical strength, on the other hand, the diameter of the hinge mechanism
206
cannot be reduced without limitation. Moreover, the diameter of the batteries C
1
and C
2
in the battery pack
204
cannot be freely restricted. If the battery diameter is reduced, then the overall capacity of the battery pack
204
will be lowered.
It may safely be said, therefore, that the thickness of the computer shown in
FIG. 49
is settled substantially depending on the battery diameter (and hence the thickness of the battery pack
204
) and the necessary strength of the hinge mechanism
206
for supporting the cover member
202
. Thus, the computer of this type cannot be thinned all over without any restriction.
FIG. 50
shows another arrangement different from the one shown in FIG.
49
. In
FIGS. 49 and 50
, like reference numerals refer to like or common elements. In the example shown in
FIG. 50
, the depth of the system body
201
is longer than the depth (L
1
) for the case of
FIG. 49
by L
2
, that is, a little longer than that of the battery pack
204
, and the pack
204
is housed in the marginal region. Accordingly, the hinge mechanism
206
which supports the cover member
202
cannot be situated right above the battery pack
204
, so that the overall thickness (D
3
) of the computer can be restricted to a thickness, D
1
+D
2
, of
FIG. 49
or less. Although the computer. of
FIG. 50
is thinner than the one shown in
FIG. 49
, however, it involves a drawback that its depth is extended by the margin (L
2
) corresponding to the depth of the battery pack.
In the conventional computer, moreover, the battery pack
204
is housed in the system body
201
, and can be removed therefrom in some fashion if necessary. It cannot, however, be attached to and detached from the system body by simple operation.
OBJECT AND SUMMARY OF THE INVENTION
The object of the present invention is to provide a portable computer in which a battery pack is externally attached to a system body of the computer so that the computer is reduced in thickness, and further the battery pack is made rotatable relatively to the system body so that the whole system including a keyboard can be inclined at an angle to the surface on which the computer is placed.
According to the present invention, a groove is formed on at least part of a battery pack so as to extend in the longitudinal direction thereof. When the battery pack is attached to a system body of a computer, a hinge unit, which is provided on the system body and supports a cover member with a display for rotation, is partially housed in the groove of the battery pack. With this arrangement, the computer is reduced in overall thickness.
When the battery pack is supported on the system body, it can rotate relatively to the system body. When the battery pack is rotated, the system body tilts at an angle to the surface of a desk or the like on which the computer is placed. Accordingly, the keyboard or the like can be easily declined toward a user without specially using feet or legs. In particular, the system body has a lug which protrudes rearward from the rear end thereof, while the battery pack has a recess which is adapted to engage the lug of the system body. With this arrangement, the battery pack can be easily attached to and detached from the system body.
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Mukaijima Katsutoshi
Nakamura Hideo
Oguchi Toshiaki
Saito Asao
Citizen Watch Co. Ltd.
Feild Lynn D.
Hogan & Hartson LLP
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