| 摘要 |
A ratchet assembly includes a housing having an actuator confining portion which extends axially and projects radially, which confines an actuator receiving space for receiving an actuator, and which is formed with an axially extending slot. A ratchet body is disposed rotatably in the housing, and has an outer surface provided with first and second ratchet wheels which are axially displaced from each other so as to define a slide portion therebetween. The actuator includes a curved plate, and first and second pawl members which project radially from the curved plate toward the ratchet body and which are disposed on opposite sides of a central line that extends through a central point of an arc length of the curved plate. An operating protrusion of the curved plate extends through the slot, and is operable to slide the actuator between a first uni-directional driving position, in which the first pawl member is slid into engagement with the first ratchet wheel and the second pawl member is slid out of engagement from the second ratchet wheel, and a second uni-directional driving position, in which the first pawl member is slid out of engagement from the first ratchet wheel and the second pawl member is slid into engagement with the second ratchet wheel.
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