Portable terminal device

Details Portable terminal device Portable terminal device

1999-11-10

2002-05-28

Chiang, Jack (Department: 2642)

Telephonic communications

Terminal

Housing or housing component

C379S433080

Reexamination Certificate

active

06396923

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates a portable terminal device, in particular, to the structure of a case for containing functional parts of a portable phone and a PHS. Specifically, the present invention relates to a configuration for improving the mechanical strength and the rigidity of the case in light of a smaller size and a thinner shape of a portable terminal device main body so as to prevent damage of the functional parts caused by bend or twist.
2. Description of the Related
Recently, manufacturers of portable terminal devices, in particular, portable phones and PHS are actively striving for new product developments to achieve a smaller size, a light weight and a thinner shape of the portable terminal devices. According to such a trend, the mechanical strength of the case for containing a portable terminal device main body tends to be vulnerable due to a thinner shape of the case and deterioration of the rigidity of the case.
The configuration of a conventional portable terminal device, such as a portable phone and a PHS will be explained hereinafter with reference to
FIGS. 6
to
10
.
FIG. 6
shows a configuration of the conventional portable terminal device. In
FIG. 6
, the portable terminal device is provided such that a printed board
12
with mounting parts
13
mounted thereon is mounted on a lower case
11
from above, and further, a battery
14
is also mounted thereon from below.
As is known conventionally, since a large number of small parts other than the mounting parts
13
are also mounted on the printed board
12
and wiring is also provided thereon, in accommodating the printed board
12
into the lower case
11
, the printed board
12
is placed with a contacting surface disposed appropriately such that the printed board
12
is mounted horizontally, without contacting with the mounting parts
13
.
FIG. 7
is a side cross-sectional view showing the accommodating configuration of the portable terminal device accordingly provided. In
FIG. 7
, which shows the relative arrangement relationship among the lower case
11
, the printed board
12
and the mounting parts
13
apparently, the mounting parts
13
are not supported by the lower case
11
.
FIG. 8
is a side cross-sectional view showing the accommodating configuration of the portable terminal device, viewed from a side different from that of FIG.
7
. Also in
FIG. 8
, which shows the relative positional relationship among the lower case
11
, the printed board
12
and the mounting parts
13
apparently, it is observed that the mounting parts
13
are not supported by the lower case
11
. Moreover, a contacting surface for supporting the printed board
12
at the center is also shown in FIG.
8
. It is observed that the contacting surface is disposed such that the printed board
12
is placed horizontally, without contacting with the mounting parts
13
as mentioned above. In
FIG. 8
, key buttons
16
, an upper case
17
, a battery case
18
and a battery cell
19
are also shown as components of the portable terminal device.
FIG. 9
is a partial enlarged side cross-sectional view of FIG.
8
. What is important in
FIG. 9
is the positional relationship among the lower case
11
, the printed board
12
and the mounting parts
13
.
FIG. 9
shows the positional relationship before starting operation.
FIG. 10
is a side cross-sectional view of the device of
FIG. 9
in operation when the key button
16
is pressed from the arrow direction. In
FIG. 10
, a problem is involved in that when the key button
16
is pressed, the printed board
12
is deformed, then the mounting parts
13
are deformed, and further, the mounting parts
13
come in contact with the lower case
11
so that the lower case
11
is deformed as well. Furthermore, a problem arises in that the battery case
18
is deformed according to the deformation of the lower case
11
.
FIG. 10
shows the deformation amount B of the printed board
12
according to the press of the key button
16
. If the deformation amount is less than this, the above-mentioned deformation problem is not arisen. However, in the current circumstances wherein a thinner shape of the case and the rigidity decline of the case results in vulnerability in terms of the mechanical strength according to the trend of a smaller size, a light weight and a thinner shape as mentioned above, a problem is involved in that the deformation amount of the conventional configuration exceeds the tolerable range.
SUMMARY OF THE INVENTION
An object of the present invention is to solve the aforementioned conventional problems and to provide a portable terminal device with a configuration having improved mechanical strength and rigidity of a case so as to prevent damage of functional parts with respect to bend or twist deriving from a small size and a thin shape of the portable terminal device main body.
According to the present invention, there is provided a portable terminal device comprising a printed board with mounting parts mounted thereon, a lower case with receiving ribs provided corresponding to the arrangement position of the mounting parts for supporting the mounting parts, and a battery case provided below the lower case for supporting deformation of the lower case.
According to the configuration, a portable terminal device with a configuration having improved mechanical strength and rigidity of a case so as to prevent damage of functional parts with respect to bend or twist deriving from a small size and a thin shape of the portable terminal device main body can be provided.


REFERENCES:
patent: 4912602 (1990-03-01), Zurek

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