초록 ▼

A single wheel-type caster includes a frame having a body portion and a pair of parallel side walls extending downwardly from the body portion. A wheel is disposed between and rotatably supported on the pair of side walls of the frame. A mechanism for locking the wheel includes a group of engagement

A single wheel-type caster includes a frame having a body portion and a pair of parallel side walls extending downwardly from the body portion. A wheel is disposed between and rotatably supported on the pair of side walls of the frame. A mechanism for locking the wheel includes a group of engagement portions which are provided at the wheel, and are arranged on a circle having its center aligned with the axis of rotation of the wheel. This wheel lock mechanism further includes a push button and a slide member. The push button is disposed in opposed relation to the outer peripheral surface of the wheel, and is supported on the body portion of the frame so as to move radially of the wheel. The slide member has an engagement portion, and is supported on one of the side walls of the frame so as to slide radially of the wheel. The slide member is moved in response to the movement of the push button. When the engagement portion of the slide member is engaged with the engagement portion of the wheel, the wheel is locked.

대표청구항 ▼

A caster comprising: (a) a frame including a body portion, and a pair of parallel side walls extending downwardly from said body portion; (b) a wheel disposed between and rotatably supported on said pair of side walls of said frame, said wheel having a number of engagement portions arranged on a cir

A caster comprising: (a) a frame including a body portion, and a pair of parallel side walls extending downwardly from said body portion; (b) a wheel disposed between and rotatably supported on said pair of side walls of said frame, said wheel having a number of engagement portions arranged on a circle having its center aligned with an axis of rotation of said wheel; (c) a push button disposed in opposed relation to an outer peripheral surface of said wheel, said push button being supported on said body portion of said frame so as to move radially of said wheel; (d) a push button hold mechanism mounted on said body portion of said frame so as to hold said push button in an inward position and in an outward position; (e) a slide member mounted on one of said side walls of said frame so as to slide radially of said wheel, said slide member having an engagement portion; (f) a plate disposed between said one side wall and said wheel, said slide member being slidingly moved through said plate in response to the movement of said push button, said engagement portion of said slide member being engaged with one of said engagement portions of said wheel to lock said wheel when said slide member is in a first position corresponding to one of said inward and outward positions of said push button, and said engagement portion of said slide member being disengaged from one of said engagement portions of said wheel to unlock said wheel when said slide member is in a second position corresponding to the other of said inward and outward positions of said push button; and (g) return spring means urging said push button and said slide member outwardly.