Abstract: A buckle assembly configured to receive a tongue and selectively engaging the tongue with a fixed latch. The buckle assembly includes a release button, a frame and an urging member. The release button receives the tongues and also slidably retains two ejectors. The frame has two fixed lathes that engage the latch receiving slots on the tongues when the tongues are at least partially inserted into the release button. In one embodiment, insertion of the tongues into the release button causes the displacement of two ejectors such that the urging member is able to urge the release button into a closed configuration in which the release button is flush with the frame. When the release button is urged into the closed configuration, the latch receiving slots are engaged by the fixed latches.

Abstract: A head array for a wheelchair includes a temple support, an occipital support, a sub-occipital support, and a support structure for adjustably mounting the temple support, the occipital support and the sub-occipital support. Also shown is a support structure for a wheelchair head array including a horizontal channel adapted to receive a first component of a wheelchair head array and a vertical channel adapted to receive a second component of a wheelchair head array, the vertical channel being attached to the horizontal component.