Safety needle autosheath

A safety device (500) is disclosed comprising: a needle receiving portion (510); a sheath portion (530) for covering the point (22b) of a needle (22); one or more pivoting arms (541,542) pivotally movable between an extended position in which said sheath portion (530) covers the point (22b) of the needle (22) and a retracted position in which the or each arm (541,542) is pivoted outwardly to extend away from the needle axis so that the point (22b) of the needle (22) projects beyond the sheath portion (530); wherein, in said extended position, the or each arm (541,542) is pivoted inwardly to extend towards the needle axis so as, in use, to prevent movement of the sheath portion (530) towards the needle receiving portion (510); means (521) for biasing the or each arm (541,542) towards said extended position; and actuating means (540) for moving the or each arm (541,542) away from said extended position towards a primed position in which the or each arm (541,542) extends outwardly away from said needle against the bias of said biasing means.