Manual fluid actuator

A dynamic tactile interface, comprising:

• a substrate defining a fluid channel;
• a tactile layer comprising a peripheral region and a deformable region, the peripheral region coupled to the substrate, and the deformable region arranged over a variable volume connected to the fluid channel, the deformable region disconnected from the substrate, and operable between a retracted setting and an expanded setting, the deformable region elevated above the peripheral region in the expanded setting;
• and
• a displacement device including a rotary actuator, an elongated member coupled to the rotary actuator, a platen coupled to the elongated member, and bladder connected to the fluid channel, wherein rotation of the rotary actuator in a first direction results in compression of the bladder, thereby displacing a fluid from the bladder through the fluid channel and into the variable volume to set an expanded setting of the deformable region.