Electronic controller with hand retainer and finger motion sensing

A controller for an electronic system, for operation by a user having a hand with fingers, the controller comprising:

• a controller body having a handle portion with an outside surface;
• a hand retainer attached to the controller body, wherein the hand retainer includes:
• a curved resilient member that biases the hand retainer in an open position, and
• a cord that is connected to the curved resilient member and configured to be cinched at an end of the handle portion,
• wherein the curved resilient member is preloaded by tension of the cord when the hand retainer is in a closed position and when the cord is cinched to cause the hand retainer to automatically open when the cord is un-cinched;
• and
• an array of proximity sensors embedded under or on the outside surface of the handle portion, the array of proximity sensors being responsive to a proximity of the fingers to the outside surface of the handle portion.

A controller for an electronic system, for operation by a user having a hand with fingers, the controller comprising:

• a controller body having a handle portion with an outside surface;
• a hand retainer attached to the controller body at two or more locations, wherein the hand retainer is adjustable in length to transition the hand retainer between a closed position and an open position, and wherein the hand retainer comprises:
• a curved resilient member to bias the hand retainer in the open position;
• and
• a cord that is connected to the curved resilient member and configured to be cinched at an end of the handle portion,
• wherein the curved resilient member is preloaded by tension of the cord when the hand retainer is in the closed position and when the cord is cinched to cause the hand retainer to automatically open when the cord is un-cinched;
• and
• an array of proximity sensors that are spatially distributed on the handle portion, the array of proximity sensors being responsive to a proximity of the fingers to the outside surface of the handle portion.