| 摘要 |
A hinge barrel (30) is mounted in a housing of a portable electronic device (20). The housing defines a receiving hole (222) surrounded by an inner wall (223). The inner wall defines two grooves (226). The hinge barrel includes an outer peripheral wall (35), and two ribs (38) formed in the outer peripheral wall. A length of the ribs is less than that of the hinge barrel, and the ribs are received in the grooves.
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