Magnetorheological fluid-based haptic knob apparatus

A magnetorheological fluid-based haptic knob apparatus comprising:

• a housing;
• a solenoid coil mounted inside the housing, the solenoid coil configured to generate a magnetic field thereby providing magnetic flux;
• a shaft connected to the housing and including a rotational rod, wherein the shaft is configured to generate a plurality of modes;
• and
• a magnetorheological fluid accommodated inside the housing, the magnetorheological fluid configured to form a magnetic chain in response of the magnetic flux,
• wherein the shaft comprises a main body rotatably arranged in the housing and bumps configured to guide a flow of the magnetorheological fluid when the main body rotates.

A magnetorheological fluid-based haptic knob apparatus comprising:

• a housing;
• a solenoid coil mounted inside the housing, wherein the solenoid coil is configured to generate a magnetic field thereby providing magnetic flux;
• a shaft connected to the housing and configured to generate a plurality of modes;
• a magnetorheological fluid accommodated inside the housing, wherein the magnetorheological fluid is configured to form a magnetic chain in response of the magnetic flux;
• and
• a control knob connected to a rotational rod and arranged on the housing so that the control knob is exposed to an outside, wherein the control knob is configured to rotate the shaft, and
• wherein the shaft comprises:
• the rotational rod,
• a main body rotatably arranged in the housing, and
• bumps configured to guide a flow of the magnetorheological fluid when the main body rotates.