An input device, in particular joystick, with an operating device and a magnetorheological brake device and a controller for activating the brake device. The operating device includes a supporting structure and an operating lever, which is accommodated on the supporting structure for pivoting around at least one pivot axis. The brake device is coupled with the pivot axis for controlled damping of a pivoting motion of the operating lever by way of the controller.

A rotational resistance apparatus includes a shaft member that includes a first shaft and a second shaft having a diameter larger than a diameter of the first shaft and that has magnetism, a bobbin that is arranged on an outer periphery of the first shaft and that does not have magnetism, a coil that is wound around the bobbin, a case member having magnetism that covers the bobbin, the coil, and the second shaft, a slide bearing that rotatably receives the first shaft through a first gap and that does not have magnetism, and a magnetic viscous fluid that is arranged between the second shaft and the case member. The first gap is smaller than a second gap between the case member and the first shaft.

A rotational resistance apparatus includes a shaft member that includes a first shaft and a second shaft having a diameter larger than a diameter of the first shaft and that has magnetism, a bobbin that is arranged on an outer periphery of the first shaft and that does not have magnetism, a coil that is wound around the bobbin, a case member having magnetism that covers the bobbin, the coil, and the second shaft, a slide bearing that rotatably receives the first shaft through a first gap and that does not have magnetism, and a magnetic viscous fluid that is arranged between the second shaft and the case member. The first gap is smaller than a second gap between the case member and the first shaft.

A vehicle Steering device with a movable steering unit that is braked by a braking device. The braking device has a stationary holder and two brake components. One brake component is rotated by the steering unit. One brake component is rotatably fixed to the holder. The brake component are continuously rotatable relative to one another about a rotational axis. A first brake component extends along the rotational axis and has a magnetically conductive core. The second brake component has a hollow casing part extending around the first brake component. A peripheral gap, filled with a magnetorheological medium, is arranged between the two brake components. The gap has two different braking gap portions. In a first braking gap portion, a disk contour is formed between the casing part and the core. In a second braking gap portion, a plurality of roller bodies are arranged around the circumference of the core.

A method for damping a movement of a door system of a vehicle that is equipped with a damping system having an adjustable and controllable damping action. A movement of the door system between a closed position and an open position is damped in a controlled manner. A measurement of the change in speed of the speed of movement of the door system is calculated and if the change in speed exceeds a predefined limit value, a set, gentle damping action is changed over to a greater damping action.

Braking torque based on a friction force is increased in a pulse state in a transition area in which control torque changes from a direction to encourage the rotation of a manipulation member to a direction to suppress the rotation. This braking torque based on a friction force does not cause vibration unlike the driving torque of an electric motor even if the braking torque is steeply increased. Therefore, when the rotational angle passes through the transition area, a clearer click feeling can be generated without a change like vibration being caused in control torque. When the manipulation member is rotated fast, the braking torque in a pulse state is likely to be felt as vibration.

Electronic devices, such as consumer electronics devices and control systems in vehicles are controlled by way of a haptic operating device with a rotating unit. Selectable menu items are displayed on a display unit, and a menu item is selected by rotating the rotating unit. The rotating unit latches at a number of haptically perceptible latching points during rotation. The number and rotational position of the haptically perceptible latching points is dynamically changed in accordance with a specific menu item selected by the user.

A system for providing pressure/load control at an end stroke stop is provided. The system includes an actuator housing having an end stroke stop and a first actuator housing side, an actuator piston provided in the actuator housing, wherein the actuator piston is movable along a longitudinal axis (A), the actuator piston having a first piston portion perpendicular to the longitudinal axis (A), and means for regulating the pressure/load control at the end stroke stop provided in the first piston portion, wherein the means for regulating the pressure/load control at the end stroke stop is configured to move from a closed position to an open position when in contact with the first actuator housing side.

A torque generation apparatus includes a magnetic disc rotatable about a rotation axis, a first yoke, a second yoke, a magnetic viscous fluid placed between the magnetic disc and the first yoke and the second yoke, a coil, and a third yoke. The coil overlaps with the magnetic disc as viewed along the rotation axis. The third yoke constitutes a magnetic path of a magnetic field generated by the coil together with the first yoke and the second yoke. The magnetic disc includes a torque increasing portion at at least one of a surface facing the first yoke and a surface facing the second yoke. The torque increasing portion is provided in an outer circumferential area of the magnetic disc in a radial direction and causes a shearing force to a cluster of the magnetic viscous fluid to become larger than that in the inner circumferential area.

A speed retarding device for a rotary nozzle includes a hollow cylindrical housing and a rotatable tubular shaft rotatably carried by the housing. The shaft has a central axial bore and an enlarged drag sleeve portion carried in the housing. A pair of support bearings support the drag sleeve portion of the shaft in the housing. An annular inner seal between each of the support bearings and the drag sleeve portion defines a cavity within the housing receiving a viscous fluid confined within the cavity. The drag sleeve portion includes a peripheral helical groove and a plurality of axial bores extending therethrough parallel to the central bore, one or more blind axial bores each having a closed end an open end, and a piston disposed in each of the one or more blind axial bores each defining an air space between the closed end and the piston.