An operation knob apparatus includes a base a conductive transmitting member, an operation member that brings the transmitting member near to and away from a display panel, and a stabilizer disposed between the bases and the operation member. The stabilizer includes a main body, a pair of arms connected to respective ends of the main body, and a pair of base portions and connected to the respective arms. One of the base and the operation member has a holding portion configured to rotatably hold the main body, and the other has a pair of holding grooves respectively configured to slidably and rotatably hold the base portions.

An operation knob apparatus includes a base a conductive transmitting member, an operation member that brings the transmitting member near to and away from a display panel, and a stabilizer disposed between the bases and the operation member. The stabilizer includes a main body, a pair of arms connected to respective ends of the main body, and a pair of base portions and connected to the respective arms. One of the base and the operation member has a holding portion configured to rotatably hold the main body, and the other has a pair of holding grooves respectively configured to slidably and rotatably hold the base portions.

A control device comprising: a body comprising a printed circuit, a mobile actuator able to move in pivoting relative to the body about an axis 50 of rotation, a torsion spring comprising two end strands resting against two respective bearing surfaces of the actuator, said torsion spring being designed to urge the actuator to rotate towards a position of rest, at least one magnet rigidly secured to the actuator, a magnetic-field sensor arranged on the printed circuit facing the magnet and designed to detect the angular position of the magnet and to produce an electric signal dependent on the detected angular position, characterized in that it comprises two end-stops rigidly secured to the body, a respective elastic element being arranged between each end-stop and the body, each end-stop comprising a bearing surface bearing on a respective end strand of the torsion spring.

A drive lever comprising a first end for insertion into a slot of the hydraulic spool valve. The first end comprises at least two resilient members which resist radial compression (R.sub.1, R.sub.2) such that they exert a radially outward force (F.sub.1, F.sub.2) on one or more inner surfaces of the slot when inserted therein. This radially outward force (F.sub.1, F.sub.2) can account for any backlash that would otherwise be present between the drive lever and the slot due to manufacturing tolerances or wear.

A micro-movement subassembly as a precise driving screw for angle adjustment, comprising a shank, a turnbuckle, and a central cylindrical shaft. The subassembly is precise for linear displacement, good orientation, stable and reliable adjustment, which can be used for a variety of precision-oriented precision micro-angle adjustment of the drive screw.

A micro-movement subassembly as a precise driving screw for angle adjustment, comprising a shank, a turnbuckle, and a central cylindrical shaft. The subassembly is precise for linear displacement, good orientation, stable and reliable adjustment, which can be used for a variety of precision-oriented precision micro-angle adjustment of the drive screw.

A regulator has a regulation unit (422, 622) with an adjustment unit (624), having a drive unit (414, 620) configured for adjusting the adjustment unit (624), and having a lockable and unlockable force store (412, 610-616). The regulation unit (422, 622) and the adjustment unit (624) are in contact with one another via the force store (412, 610-616), and the regulation unit (422, 622) can, in the case of a locked and charged force store (412, 610-616), be displaced by the adjustment unit (624) within an adjustment range (630) so as to drive the force store (412, 610-616). In the event of unlocking the charged force store (412, 610), a discharge of the force store (412, 610-616) causes the regulation unit (422, 622) to be moved automatically into a safety position independently of the adjustment unit (624).

A footswitch for a medical instrument, with a housing, and with an elastically deformable suction cup arranged in the housing, where a negative pressure is generated in the suction cup by means of an evacuation device in order to secure the housing to a floor surface. In order to create a footswitch which is suitable for a medical instrument and which, while having a simple design and being easy to handle, ensures that the footswitch is secured in a fixed position on a floor surface. The suction cup is elastically extensible via the evacuation device in order to generate the negative pressure by enlargement of the volume enclosed by the suction cup.

A footswitch for a medical instrument, with a housing, and with an elastically deformable suction cup arranged in the housing, where a negative pressure is generated in the suction cup by means of an evacuation device in order to secure the housing to a floor surface. In order to create a footswitch which is suitable for a medical instrument and which, while having a simple design and being easy to handle, ensures that the footswitch is secured in a fixed position on a floor surface. The suction cup is elastically extensible via the evacuation device in order to generate the negative pressure by enlargement of the volume enclosed by the suction cup.

A control knob comprises an encoder assembly configured to convert rotary and axial input movement into electronic signals, and a knob assembly attached to the encoder assembly and configured to be operated by a user, wherein the encoder assembly comprises a shaft encoder having a shaft that is configured to be rotated around a rotation axis and to be moved axially along the rotation axis, the knob assembly comprises an outer knob element configured to be operated by a user, the knob assembly further comprises a bush defining a cylindrical cavity inside the outer knob element, wherein the bush has an opening towards a first side of the outer knob element facing towards the encoder assembly, the knob assembly further comprises a driver element extending into the bush from a second side opposite the first side.