| 摘要 |
A tilt control structure for controlling the tilt angle of the back of a chair is disclosed to include a positioning unit affixed to the back of the chair, a control unit affixed the to seat of the chair and pivoted to the positioning unit, the control unit having an engagement block for engaging the positioning unit to lock the back of the chair, an actuating block coupled to the engagement block through a spring member, and an operating handle turnable between a first position where the spring member is forced by the actuating block to move the engagement block into engagement with the positioning unit and a second position where the spring member is reversed to disengage the engagement from the positioning unit.
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