Patent ID: 8627927

Claim:
A device having a set of legs for supporting the device, the set of legs including at least two legs, each of which has a slidable leg part slidably positioned with respect to another part of the device to form a leg having an adjustable length; a locking structure arranged to prevent movement of each of the slidable leg parts with respect to said other part of the device in a locked state of the locking structure, and to allow movement of each of the slidable leg parts with respect to said other part of the device in an unlocked state of the locking structure, a flexible member interconnecting the slidable leg parts, the flexible member being arranged such that it pulls the locking structure into the unlocked position when strained; wherein the locking structure comprises at least two movable locking members, each of which is hingeably connected to respective ones of the slidable leg parts, the flexible member has one end attached to a first one of the locking members and another end attached to a second one of the locking members, so that said locking member fall under the action of gravity into a locked engagement with said other part of the device, when said flexible member is unstrained, and so that said locking members are pulled out of the said locked engagement, when said flexible member is strained by gravity acting on the weight of at least one of the slidable leg parts when unsupported.