초록 ▼

A wheel assembly has a housing, a wheel, a rotating device and a controlling device. The housing has a sleeve, an extending portion extending laterally from the sleeve, and brackets extending from opposite sides of the housing. The wheel is rotatablely mounted between the brackets of the housing via

A wheel assembly has a housing, a wheel, a rotating device and a controlling device. The housing has a sleeve, an extending portion extending laterally from the sleeve, and brackets extending from opposite sides of the housing. The wheel is rotatablely mounted between the brackets of the housing via a shaft. A rotating device includes a lower pole for engaging with the sleeve of the housing, and a fixing element at bottom of the lower pole for fixing the lower pole on the sleeve in assembly. The controlling device includes a limiting element and a pressing element cooperating with each other to limit direction of the housing and rotation of the wheel simultaneously. The limiting element is mounted in the extending portion and adjacent to the wheel in assembly. The pressing element is mounted on an end of the extending portion for driving the limiting element.

대표청구항 ▼

What is claimed is: 1. A wheel assembly comprising:a housing having a sleeve, an extending portion extending laterally from the sleeve, and brackets extending from opposite sides of the housing;a rotating device having a lower pole inserted through an axis hole of the sleeve of the housing, and a fi

What is claimed is: 1. A wheel assembly comprising:a housing having a sleeve, an extending portion extending laterally from the sleeve, and brackets extending from opposite sides of the housing;a rotating device having a lower pole inserted through an axis hole of the sleeve of the housing, and a fixing element having a first end connected to a bottom of the lower pole and fixing the lower pole on the sleeve in assembly, the fixing element having a cap located on a second end thereof;a wheel rotatably mounted between the brackets of the housing via a shaft; anda controlling device having a limiting element and a pressing element, the limiting element being mounted in the extending portion and adjacent to the wheel in assembly, the pressing element being mounted on an end of the extending portion for driving the limiting element, the limiting element having a slot located through a first end thereof and a latch formed on a second end thereof, the cap of the fixing element is located in the slot of the limiting element, a spring tongue being stamped from substantially a middle of the limiting element for abutting against inner surfaces of the extending portion,wherein a ring projection is formed on an inner peripheral edge surface of the slot and selectively engaging the cap of the fixing element.