| 摘要 |
A headrest device, intended for a chair, a seat or the like having a substantially vertical backrest, has an attachment part (1), by means of which it is to be attached to the backrest, and a headrest (6), which is mounted on the attachment part (1). The headrest (6) is mounted on the attachment part (1) by means of two link arms (7, 8), which at one end are connected, pivotally about a substantially vertical pivot axis, to the attachment part (1) and which at the other end are connected, hingedly about a substantially vertical axis, to a respective nut element (15, 16). The nut elements (15,16) are threadingly engaged with a substantially horizontal screw (23), which is turnably attached to the headrest (6) and which is arranged, in turning, to synchronously displace the nut elements (15, 16) in opposite directions along the screw (23) and thereby to pivot the link arms (7, 8) about their pivot axes to change the horizontal distance of the headrest (6) from the attachment part (1). |
