Leg device

摘要

A leg device that is capable of simultaneously releasing three extendible/contractible legs from a locked state with a single action is provided. A tripod, which is a leg device, has a base. A tripod head is attached to a tripod head attaching portion of the base. A middle extendible/contractible leg, a one-side extendible/contractible leg, and an opposite-side extendible/contractible kg are pivotally attached to a leg attaching portion of the base. Gripping all the three extendible/contractible legs, i.e. the middle extendible/contractible leg, the one-side extendible/contractible leg, and the opposite-side extendible/contractible kg, together causes the middle extendible/contractible leg, the one-side extendible/contractible leg, and the opposite-side extendible/contractible leg to simultaneously shift from a locked state to an unlocked state.

主权项

1. A leg device comprising:
a base; and at least three extendible and contractible legs that are provided at the base in such a manner as to be capable of being extended and contracted, wherein: the leg device is configured such that gripping all of the at least three extendible and contractible legs together causes the at least three extendible and contractible legs to simultaneously shift from a locked state to an unlocked state, each one of the at least three extendible and contractible legs comprises:
a first pipe-shaped body having a female engagement portion;a second pipe-shaped body movably inserted in the first pipe-shaped body;a restriction element that is provided so that, when the at least three extendible and contractible legs are in the locked state, engagement of the restriction element with the female engagement portion prevents movement with respect to the first pipe-shaped body of the second pipe-shaped body and that, when the at least three extendible and contractible legs are in the unlocked state, the restriction element does not engage with the female engagement portion, thereby enabling movement with respect to the first pipe-shaped body of the second pipe-shaped body; anda biasing element for applying a biasing force to the restriction element, when the at least three extendible and contractible legs are in a folded state, the at least three legs are on a same plane, the leg device is configured such that gripping all of the at least three extendible and contractible legs arranged side by side on a same plane together to clasp them from both lateral sides causes restriction elements of the at least three extendible and contractible legs to simultaneously overcome the biasing force of biasing elements and to move from a position where the restriction elements are capable of engaging with female engagement portions to a position where the restriction elements do not engage with the female engagement portions, the at least three extendible and contractible legs are composed of a middle extendible/contractible extendible and contractible leg, a one-side extendible and contractible leg, and an opposite-side extendible and contractible leg, the one-side extendible and contractible leg and the opposite-side extendible and contractible leg pivotally moves in a first direction while the middle extendible and contractible leg moves in a second direction perpendicular to the first direction, the middle extendible and contractible leg, the one-side extendible and contractible leg and the opposite-side extendible and contractible leg are respectively provided with unlocking elements, each of which has a polygonal pipe-like shape and is attached to and covers a corresponding outer peripheral side of an lower end portion of the first pipe-shaped body, an unlocking element of the one-side extendible and contractible leg is provided, at a side facing away from the middle extendible and contractible leg, with an elastically deformable operation portion that is configured to be pushed for operation by a user and thereby elastically deformed so as to move the restriction element of the one-side extendible and contractible leg, and with a convex portion which is a pushing portion protruding toward outside at the side facing away from the middle extendible and contractible leg, an unlocking element of the opposite-side extendible and contractible leg is provided, at a side facing away from the middle extendible and contractible leg, with an elastically deformable operation portion that is configured to be pushed for operation by the user and thereby elastically deformed so as to move the restriction element of the opposite-side extendible and contractible leg, and with the convex portion which is the pushing portion protruding toward outside at the side facing away from the middle extendible and contractible leg, an unlocking element of the middle extendible and contractible leg is provided, at a side adjacent to one of the one-side extendible and contractible leg and the opposite-side extendible and contractible leg, with an elastically deformable operation portion that is configured to be pushed for operation by the pushing portion of the unlocking element of the one of the one-side extendible and contractible leg and the opposite-side extendible and contractible leg and thereby elastically deformed so as to move the restriction element of the middle extendible and contractible leg, and at the side adjacent to the one of the one-side extendible and contractible leg and the opposite-side extendible and contractible leg, with the convex portion which is the pushing portion protruding toward outside coming into contact with the pushing portion of the unlocking element of another of the one-side extendible and contractible leg and the opposite-side extendible and contractible leg, and the elastically deformable operation portions of the respective unlocking elements of the middle extendible and contractible leg, the one-side extendible and contractible leg and the opposite-side extendible and contractible leg are an elastically deformable plate and configured to move the regulating member rotating mainly around the upper side by elastic deformation.