| 摘要 |
A retractable utility knife has a housing, a blade seat forward slidably received in the housing, a blade fixed to the blade seat, a driving unit having an actuator protruding out from the housing and an actuator seat reciprocally slidable along the housing, a blade seat return spring linking the blade seat and the housing, and a blade change means. The blade of the retractable utility knife is also able to be locked when fully extended to avoid painstaking thumb pushing when works for mass workloads. |
