An electronic cart with an electronic cart body including one or more internal compartments. The cart includes one or more wheels and/or a track assembly supporting the electronic cart body. One or more batteries are carried by the electronic cart body. The cart has a drive system to drive the one or more wheels and/or the track assembly, which is powered, at least in part, by the one or more batteries. One or more hand-operated cart controls are provided on the cart to adjust at least a speed with which the drive system drives the one or more wheels and/or the track assembly.

Disclosed are a child sitting saddle and a child stroller, the child sitting saddle comprises an enclosure frame assembly, a plug connector, a seat rod assembly and a cloth cover including a seat cloth cover and a backrest cloth cover; the child sitting saddle further comprises a first lock mechanism for locking the enclosure frame assembly with the plug connector, a connecting rod and a second lock mechanism disposed between the seat rod assembly and the connecting rod; when in a chair state, the seat rod assembly obliquely intersects with the backrest cloth cover; when in a sleeping basket state, the seat rod assembly, the seat cloth cover and the backrest cloth cover are all disposed horizontally. The child sitting saddle can be converted between the chair state and the sleeping basket state, and the conversion is convenient.

A multipurpose cart is provided herein. The multipurpose cart includes a substantially flat main support frame, a wheel support frame, at least one wheel, and a tarp selectively connectable to the main support frame. The wheel support frame extends from an end of the main support frame and is inclined upwardly relative to a topside of the main support frame. The wheel support frame includes an axle that is spaced apart from an underside of the main support frame by an offset distance. The at least one wheel is rotatably connected to the axle and has a radius substantially equal to the offset distance. The tarp is configurable in an open position to rest on a majority of the cart. The tarp includes reinforcement straps connected to a lower surface of the tarp and further includes at least one retainer for selectively connected the tarp to the cart.

An angle adjusting joint includes a fixed member and a movable member pivotally connected with the fixed member. The fixed member is provided with a receiving recess which has a substantially circular cross-section. The receiving recess has an inside provided with a plurality of projections and a plurality of locking grooves arranged between the projections. The movable member is connected with at least one fitting portion which has a substantially arcuate cross-section. The at least one fitting portion is fitted into the receiving recess and has an outside provided with at least one locking block locked in the locking grooves.

Disclosed are a child sitting saddle and a child stroller, the child sitting saddle comprises an enclosure frame assembly, a plug connector, a seat rod assembly and a cloth cover including a seat cloth cover and a backrest cloth cover; the child sitting saddle further comprises a first lock mechanism for locking the enclosure frame assembly with the plug connector, a connecting rod and a second lock mechanism disposed between the seat rod assembly and the connecting rod; when in a chair state, the seat rod assembly obliquely intersects with the backrest cloth cover; when in a sleeping basket state, and the seat rod assembly, the seat cloth cover and the backrest cloth cover are all disposed horizontally. The child sitting saddle can be converted between the chair state and the sleeping basket state, and the conversion is convenient.

A moving carrier includes a body frame connecting device, an adjustment assembly, a body frame, an axle frame, at least one axle and at least one wheel. The adjustment assembly is disposed on the body frame connecting device. One end of the body frame is connected to the body frame connecting device. The relative positions of the body frame and the body frame connecting device are changed by adjusting the adjustment assembly. The axle frame is disposed on the body frame connecting device. The axle is connected to the axle frame. The wheel is disposed on the axle and connected to the axle frame by the axle.

An extendable strut assembly comprises a nested series of square or rectangular beams, the centermost of which may be a solid bar and all others are hollow sections. Glide strips of predetermined thicknesses take up the clearances between the beams and can be affixed to the beams by adhesive, so that beam surfaces run smoothly on the glide strips and the strut assembly can be extended and retracted with ease.

A rolling cart has a wheeled frame, telescoping vertically extendable members with glide strips, and a tiltable frame having glide strips interspersed with transfer balls to easily slide slabs or sheet materials for construction such as when installing countertops. The tiltable frame includes retractable lifter feet which support a slab in transit but drop below the level of the slab automatically when the tiltable frame is tilted to horizontal.

A moving carrier includes a body frame connecting device, an adjustment assembly, a body frame, an axle frame, at least one axle and at least one wheel. The adjustment assembly is disposed on the body frame connecting device. One end of the body frame is connected to the body frame connecting device. The relative positions of the body frame and the body frame connecting device are changed by adjusting the adjustment assembly. The axle frame is disposed on the body frame connecting device. The axle is connected to the axle frame. The wheel is disposed on the axle and connected to the axle frame by the axle.

A rolling cart has a wheeled frame, telescoping vertically extendable members with glide strips, and a tiltable frame having glide strips interspersed with transfer balls to easily slide slabs or sheet materials for construction such as when installing countertops. A method is also described for measuring a minuend desired install height, subtracting a geometrically predetermined subtrahend, and adjusting the height from a floor surface to a pivot axis on the cart to equal the difference, said adjustment being effected by powered lifting means incorporated or ancillary to the cart.