| 摘要 |
The invention relates to a ratchet mechanism (13) for rotary locking of a second body (21) in relation to a first body (9), the ratchet mechanism (13) comprising a gear rim (16) and at least one arm (17), which is turnably arranged around a fixing point (18) on the said first body (9) and which comprises at least one magnetic material (19) and at least one projection (20) for engagement with the gear rim (16), which is fixedly connected to, or forms part of, the second body (21) and that said second body (21) comprises a magnetic material (22). At least one of the magnetic material (19) on the arm (17) and the magnetic material (22) of the second body (21) comprising a magnet- |
