US 7,070,246 B2Granted

Wheel device with quick-releasing mechanism

AssigneeWonderland Nurserygoods Company Limited

InventorShun-Min Chen

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Abstract

A wheel device with quick-releasing mechanism comprises a wheel body and an U-shaped movable member. The wheel body further has two tabs and an elastic element. The movable member further includes a first board having a first wall surface and a second wall surface each other in different planes, and an I-shaped second board restricted by the two tabs. When the movable member is at a first position and the first wall surface is aligned with a second section of a shaft, the wheel body can be escaped from the shaft. When the movable member is at a second position and the second wall surface is aligned with the second section of the shaft, the wheel body is restricted to the shaft by the movable member. In addition, the movable member having quick-releasing function is usually kept at the state of restriction due to the elastic element and/or a protrusion on the movable member.

Claims11

Dependent claims

A wheel device with a quick-releasing mechanism for being mounted to a shaft which has a first section with a larger diameter and a second section with a smaller diameter, the wheel device comprising

a wheel body having an elastic element integrally formed with the wheel body and a hole at the center of the wheel body for accommodating the shaft;
and
a movable member movably mounted to the wheel body and contacted with the elastic element, and the movable member having a first wall surface and a second wall surface which is situated in different planes with the first wall surface, a distance between the first wall surface and the center of the wheel body being larger than that between the second wall surface and the center of the wheel body;
whereby the wheel body can be removed from the shaft when the movable member is set at a first position and the first wall surface is aligned with the second section of the shaft, and the first section of the shaft is blocked by the second wall surface so that the wheel body is restricted on the shaft by the movable member when the movable member is set at a second position and the second wall surface is aligned with the second section of the shaft.

1 more element

Dependencies are inferred from the claim text.