Patent ID: 8807862

Claim:
An adjusting mechanism comprising: a handle, pivotable about a pivot point thereon between a front inclined position and a rear inclined position, said front and rear inclined positions defining a pivot angle therebetween; an article holding accessory comprising side surfaces and a top surface, said top surface including at least one opening for receiving an article; a sleeve component secured to the handle at a point distal to said pivot point; an axle ring component connected to one of said side surfaces of the article holding accessory and connected rotatably to said sleeve component, said axle ring component comprising a base wall and an annular surrounding wall extending from said base wall, said surrounding wall comprising a first engaging part and a second engaging part separated by an angle substantially equal to said pivot angle, the base wall further including a limiting protrusion extending therefrom; and a positioning plate coaxially and non-rotatably secured in said sleeve component, said positioning plate having at least one positioning part formed on a periphery thereof, said at least one positioning part adapted for rotating between and engaging a selected one of said first and second engaging parts, said positioning plate further including at least one limiting opening formed radially inwardly from said at least one positioning part, said limiting opening defining an angular extent substantially equal to said pivot angle, wherein when the handle is in the front inclined position, said at least one positioning part engages with said first engaging part, said limiting protrusion abuts a first end of the limiting opening, and the top surface of the article holding accessory is at a substantially horizontal position, and wherein when the handle is in the rear inclined position, said at least one positioning part engages with said second engaging part, said limiting protrusion abuts a second end of the limiting opening opposite said first end, and the top surface of the article holding accessory is at another substantially horizontal position.