Patent ID: 7746626

Claim:
A portable electronic device having an auxiliary input unit, comprising: a first member comprising a first sliding unit aligning along a first direction; a second member capable of sliding along the first direction and a second direction relative to the first member and comprising a second sliding unit; and a moving element configured between the first member and the second member and having a first side facing the first member and a second side facing the second member, the moving element further comprising a third sliding unit and a fourth sliding unit, the third sliding unit configured on the first side allowing the moving element for sliding along the first direction relative to the first sliding unit, the fourth sliding unit configured on the second side aligning along the second direction, the second sliding unit capable of sliding along the second direction relative to the fourth sliding unit; wherein when the second member slides along the first direction relative to the first member, the second sliding unit is utilized for driving the moving element to slide with the second member along the first direction relative to the first member.