Abstract: A cable tensioning system including a roller-and-wedge clutch is disclosed. The cable tensioning system can be used in an adjustable headband for a head-mountable display. In an example, a tensioning system includes a cable; a cam wheel including a roller opening, the cam wheel including a ramped surface adjacent the roller opening; a dial housing encircling the cam wheel; and a roller in the roller opening, the roller being configured to roll along the ramped surface, the roller being configured to lock the cam wheel and the dial housing when the cable moves in a first direction, the roller being configured to unlock the cam wheel and the dial housing when the cable moves in a second direction opposite the first direction.

Abstract: A head-mounted device may have a head-mounted housing containing rear-facing displays that display images for a user when the head-mounted housing is worn by the user. The head-mounted device housing may have housing structures such as elongated housing members with protruding posts. A headband may be removably coupled to the head-mounted device housing. The headband may have a strap with openings configured to receive the posts. Releasable latches may be provided to allow selective engagement and disengagement between the headband and the housing. The latches may contain movable latch members that are biased using magnetic biasing mechanisms, spring-based biasing mechanisms, or other biasing mechanisms. To release each latch, a tab, button, toggle lever, slider, or other release mechanisms may be actuated by a user. This moves the movable latch member from a closed latch position to an open latch position that releases the headband from the housing.

Abstract: A head-mounted device may have a head-mounted housing containing rear-facing displays that display images for a user when the head-mounted housing is worn by the user. The head-mounted device housing may have housing structures such as elongated housing members with protruding posts. A headband may be removably coupled to the head-mounted device housing. The headband may have a strap with openings configured to receive the posts. Releasable latches may be provided to allow selective engagement and disengagement between the headband and the housing. The latches may contain movable latch members that are biased using magnetic biasing mechanisms, spring-based biasing mechanisms, or other biasing mechanisms. To release each latch, a tab, button, toggle lever, slider, or other release mechanisms may be actuated by a user. This moves the movable latch member from a closed latch position to an open latch position that releases the headband from the housing.

Abstract: A support band for a wearable electronic device includes a first band portion, a second band portion, and an adjustment assembly. A cable is connected to the second band portion extends through a first passage and a second passage of a cable lock that is connected to the first band portion. The locking features allow movement of the cable in a tightening direction and restrain movement of the cable in a loosening direction. A cable pull engages a first portion of the cable between the first passage and the second passage. The cable pull moves away from the cable lock during an extension stroke, and the cable pull moves toward the cable lock during a return stroke.

Abstract: A head-mounted device may have a head-mounted housing containing rear-facing displays that display images for a user when the head-mounted housing is worn by the user. The head-mounted device housing may have housing structures such as elongated housing members with protruding posts. A headband may be removably coupled to the head-mounted device housing. The headband may have a strap with openings configured to receive the posts. Releasable latches may be provided to allow selective engagement and disengagement between the headband and the housing. The latches may contain movable latch members that are biased using magnetic biasing mechanisms, spring-based biasing mechanisms, or other biasing mechanisms. To release each latch, a tab, button, toggle lever, slider, or other release mechanisms may be actuated by a user. This moves the movable latch member from a closed latch position to an open latch position that releases the headband from the housing.