Optimum Design of a Cellular Phone Using LS-OPT Considering the Phone Drop Tes

The main factor of the cellular phone fracture is the impact due to the phone drop. Two cases of design criteria are assigned to reduce the damage of the phone for the drop test. One is that the main part and the battery should not be separated, being dropped at a height of 30 cm. The other is that they should be separated, being dropped at a height of 150 cm. The separation between them could reduce the damage of the cellular phone. However, it is undesirable for the battery to be frequently separated from the phone at a low height. The purpose of this study is to optimize the locking knob of the cellular phone considering the phone drop test at a height of 30cm. The design variables are the width and the thickness of the locking knob. LS-INGRID is adapted to automate the optimum design process because the shape of the locking knob could be changed in the design process. The optimum design is performed using RSM (response surface method) in the LS-OPT. The optimum design values are determined to optimize the displacement at the certain position of the locking knob of the cellular phone.