| 摘要 |
There has been a problem that a portable telephone grows larger its size by the volume of a space for improving its acoustic characteristics. Then, a portable terminal includes upper casing 101 equipped with a display 110; lower casing 102 which is relatively movably connected with the upper casing 101 opposed to the back of the upper casing 101, and in which a speaker opening 108 for emitting a voice produced by a built-in speaker 104 is formed; and a rib 106 formed so as to enclose the speaker opening in a way that the rib closes in the other direction while opening in an arbitrary direction, and so as to extend to an end of the lower casing 102 in the vicinity of the speaker opening 108 provided at the front of the lower casing 102 opposed to the back of the upper casing 101, with the lower casing being relatively movably connected with the upper casing 101. Briefly, since the rib 106 and the back of the upper casing 101 can be devoted as a space for improving its acoustic characteristics, this eliminates the need for the provision of the space for improving its acoustic characteristics in the casing, thus enabling the downsizing and slimming of the casing.
|
