ADJUSTMENT DEVICE

摘要

An adjustment device (1) is provided which comprises a handle portion (2) that may be grasped by a user, a spindle portion (4) adapted to engage an element to be rotated against a resistive torque, first magnets (14) attached to the handle portion (2) and second magnets (15) attached to the spindle portion (4), arranged such that there is magnetic attraction between the first and second permanent magnets (14, 15) to form a magnetic coupling, and the handle portion (2), the spindle portion (4) and the magnetic coupling are arranged so that when a relative torque below a predetermined torque is applied to the handle portion (2) and the spindle portion (4), the handle portion (2) and spindle portion (4) will rotate together, due to the magnetic coupling, and when a relative torque greater than the predetermined torque is applied to the handle portion (2) and the spindle portion (4), the magnetic coupling will be overcome and the handle portion (2) will rotate with respect to the spindle portion (4). This enables easy and accurate adjustment of an element to be rotated against a resistive torque.