Patent ID: 8069822

Claim:
A pet exercise wheel assembly having a light-emitting device, the pet exercise wheel assembly comprising: an exercise wheel made of a material pervious to light, wherein the exercise wheel has an opening formed on a side of the exercise wheel, with a tapered sleeve projecting from a center of the exercise wheel and axially formed with a penetrating channel, and with a plurality of ribs for a pet to step on formed on an inner periphery of the exercise wheel; a light-emitting device having a casing formed with a central hole for being pierced by and thereby coupled with the tapered sleeve inside the exercise wheel, with a circuit board located in the casing and formed with a central hole also pierced by the tapered sleeve, with the circuit board being provided with at least a lamp, a battery, a rocker switch, and an IC chip that are electrically connected to each other, with the lamp exposed at an exterior of the casing; a wheel base including a side formed with a fastening portion having an engaging groove for engaging with bars of an external pet cage, and wherein the wheel base has a screw portion for piercing through the penetrating channel of the exercise wheel; and a cover cap coupled with the screw portion pierced through the penetrating channel of the exercise wheel, whereby, the pet stepping on the ribs inside the exercise wheel rotates the exercise wheel and in turn drives the light-emitting device fixed to the tapered sleeve of the exercise wheel to rotate therewith, so that the rocker switch of the light-emitting device is rocked to close a loop of the circuit board, thereby causing the lamp of the light-emitting device to blink.