Telephonic communications – Terminal – Housing or housing component
Reexamination Certificate
1999-11-12
2003-01-28
Chiang, Jack (Department: 2642)
Telephonic communications
Terminal
Housing or housing component
C379S368000, C379S433070
Reexamination Certificate
active
06512827
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a portable terminal device and in particular, it relates to one provided with a water-proof structure with improved assembling property and water-proof property so as to prevent entrance of water or the like from the periphery of an operating portion into the inside of the main body of the device.
2. Description of the Related Art
Conventionally, as portable terminal devices, such as a portable phone device and a PHS, one shown in
FIGS. 5A and 5B
has been known. That is, according to the water-proof structure of the key sheet periphery portion of the portable terminal device shown in
FIG. 5B
, a rib
12
is provided in a key sheet
11
made from a silicone rubber, with the rib
12
contacting with an upper cover
10
so as to prevent entrance of water or the like from the surface portion of the key sheet
11
into the inside of the main body of the device, such as a printed board
13
.
FIG. 5A
is an enlarged view of the portion of the
FIG. 5B
surrounded by the two-dot chain line, showing an example of the rib
12
accurately contacting with the upper cover
10
.
Recently, tasks such as a small size, a light weight and weight reduction of a portable terminal device have been the principal part in designing portable terminal devices. With the conventional shapes, it is difficult to achieve the tasks. That is, with the conventional water-proof structure of the key sheet periphery portion of the portable terminal device, the surface of the upper cover
10
contacting with the rib
12
is narrow, and thus a problem arises in that the water-proof property becomes insufficient in the case the rib
12
provided in the key sheet
11
is displaced in handling the key sheet of the portable terminal device as shown in
FIGS. 6A and 6B
.
SUMMARY OF THE INVENTION
In order to solve the above problem, an object of the invention is to provide a portable terminal device provided with a water-proof structure with improved assembling property and water-proof property so as to prevent entrance of water or the like from the periphery of an operating portion into the inside of the main body of the device.
In order to achieve the above object, according to a first aspect of the invention, there is provided a portable terminal device comprising: an upper cover having a rib with a substantially convex cross-section provided around an operating portion; a printed board for receiving an operation input from the operating portion; and a water-proof member provided between the upper cover and the printed board, having a rib with a substantially convex cross-section provided contacting with the printed board with a center shared with the rib with the substantially convex cross-section provided in the upper cover.
According to a second aspect of the invention, there is provided a portable terminal device comprising: an upper cover having a rib with a substantially convex cross-section provided around an operating portion; a printed board for receiving an operation input from the operating portion; and a key sheet provided with input buttons constituting the operating portion, provided between the upper cover and the printed board, having a rib with a substantially convex cross-section provided contacting with the printed board with a center shared with the rib with the substantially convex cross-section provided in the upper cover.
REFERENCES:
patent: 4698464 (1987-10-01), Tanaka et al.
patent: 5625688 (1997-04-01), Ford et al.
patent: 5734136 (1998-03-01), Newcomer et al.
patent: 30 38 613 (1981-04-01), None
patent: 0 685 954 (1995-12-01), None
patent: 1 543 121 (1979-03-01), None
Chiang Jack
Matsushita Electric - Industrial Co., Ltd.
Nguyen Quynh
Pearne & Gordon LLP
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