Patent ID: 8203543

Claim:
A portable electronic device comprising: a touch control pen including an elongate main body that has a tip end, and a positioning projection extending laterally from said main body; a housing configured with an elongate inner accommodating space extending in a longitudinal direction for accommodating said touch control pen therein, and formed with a housing opening disposed at one end of said housing, in spatial communication with said inner accommodating space and permitting insertion of said touch control pen into said inner accommodating space therethrough, and a positioning groove in spatial communication with said housing opening and said inner accommodating space; and a biasing member disposed in said inner accommodating space in said housing; wherein said housing includes a top wall, and a lateral wall having a curved upper end portion connected to said top wall; and wherein said positioning groove has a first groove portion formed in said top wall, in spatial communication with said housing opening and extending in the longitudinal direction, a second groove portion formed in said upper end portion of said lateral wall and extending in the longitudinal direction, and a curved third groove portion formed in said upper end portion of said lateral wall, and interconnecting one end of said first groove portion distal from said one end of said housing and one end of said second groove portion distal from said one end of said housing, said end of said first groove portion being farther from said one end of said housing than said end of said second groove portion.