| 摘要 |
PURPOSE: A pressure sensing device for an input device is provided to electrically connect a contact point electrode attached to a circumference bottom of a center key to a contact point pattern unit if pressure is applied from the top of the center key, thereby sensing pressure. CONSTITUTION: A contact point electrode(24) is attached to a circumference bottom of a disc type center key(20) and is formed of conductive materials. A ring type elastic member(22) surrounds the contact point electrode in the circumference bottom of the center key. A contact point pattern unit(32) is formed in the bottom of the contact point terminal. The shape of the contact point terminal corresponds to the shape of the contact point pattern unit. Contact point electrodes are formed in a location symmetrical to the center key.
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