Abstract: A soccer ball dispenser is provided with a table including a top opening and two opposite inlets; and a pushing device under the table and including a tube communicating with the opening of the table, a slot through the tube, two opposite side openings through the tube, two opposite ramps each communicating one inlet with one side opening, a threaded shaft, a first limit switch, a second limit switch, a sliding sleeve put on the tube and having a notch aligned with the slot, a biasing member secured to the table and the sliding sleeve respectively, a pushing assembly in the tube and including a nut put on the threaded shaft, a link passing through the slot to interconnect the pushing assembly and the nut, and a rod extending out of the nut, and an induction motor operatively connected to the threaded shaft.

Abstract: A soccer ball dispenser is provided with a table including a top opening and two opposite inlets; and a pushing device under the table and including a tube communicating with the opening of the table, a slot through the tube, two opposite side openings through the tube, two opposite ramps each communicating one inlet with one side opening, a threaded shaft, a first limit switch, a second limit switch, a sliding sleeve put on the tube and having a notch aligned with the slot, a biasing member secured to the table and the sliding sleeve respectively, a pushing assembly in the tube and including a nut put on the threaded shaft, a link passing through the slot to interconnect the pushing assembly and the nut, and a rod extending out of the nut, and an induction motor operatively connected to the threaded shaft.

Abstract: A mesh chair back includes a loop-shaped frame, an elastic mesh part, a waist support unit, and a smooth separating plate; the loop-shaped frame has left and right upright portions; the elastic mesh part is positioned over and secured on the loop-shaped frame; the waist support unit is arranged behind the elastic mesh part, and connected to the left and the right upright portions of the loop-shaped frame at two ends in an up and down displaceable manner; the smooth separating plate is positioned between the mesh part and the waist support unit for preventing the waist support unit from rubbing and causing wear to the mesh part while the waist support unit is being adjusted in height; the waist support unit props the separating plate and the mesh part forwards such that the separating plate and the mesh part each has a forwards protruding portion.

Abstract: A chair is provided with adjustable armrests. The chair has two vertical guiding bars, each of which extends down from a lateral side of a back thereof, and each of which has engaging trenches spaced along it. Each armrest has a connecting space extending vertically through a rear end thereof, and is up and down movably connected to a corresponding guiding bar at the connecting space thereof. A lever is pivoted to a bottom of the rear end of each armrest. Each lever has an engaging projection, which can be fitted into one of the engaging trenches of corresponding guiding bar to make the armrest unmovable by means of pivoting the lever to the locking position. When the levers are in the unlocking position, the armrests can be adjusted in height.