| 摘要 |
A height-adjustable armrest unit for a chair includes a support, a generally upright sleeve, a leverage body, and a biasing member. The support is fixed on a seat of the chair and includes an upright plate portion which has an upright guiding slot formed therethrough and a column of engaging notches communicated with the slot. The sleeve is mounted on the upright plate portion of the support. The leverage body has an intermediate portion mounted pivotally on a first inner wall of the upright sleeve, an actuated upper end portion, and a lower end portion with a lock pin axially projecting therefrom and extending slidably into the guiding slot in the plate portion. The biasing member biases the upright sleeve to push the lock pin to engage a selected one of the notches. The upper end portion of the leverage body can be actuated against biasing action of the biasing member to disengage the lock pin from the selected one of the notches so as to retract into the guiding slot in the plate portion. The leverage body and the upright sleeve are movable relative to the support by shifting the lock pin along the guiding slot so as to enable engagement of the lock pin with another one of the notches.
|
