Office chair has back rest attached by rocker arm to mounting at top of support column, arm having slot with curve whose center is located near hip joint of user, seat being mounted on arm which fits into slot

摘要

The office chair has a back rest attached by a rocker arm (10) to a mounting (2) at the top of a support column (1). The arm has a slot (9) with a curve whose center is located near the hip joint (11) of a user. The seat (4) is mounted on an arm which fits into the slot and has a connecting rod (7) linking it to the mounting on the column.