| 摘要 |
The present invention relates to a caster (100) which improves the overall structure of an existing caster, is configured to be capable of maintaining firm coupling or a supporting force between a vehicle wheel and the housing, allows related components exposed to protrude to the outside to be sunk without additional means such that external interference is avoided, can be protected from movement limitations during use or risks of accidents, has a predetermined packing member integrally coupled such that water or the like does not intrude to a bearing coupling site, thus improving durability. The present invention includes: a support unit (10) directly connected to a car to support a downward load of the car; a fixing housing (20) coupled with the supporting unit by the medium of a bearing (50), and ensures a radius of rotation of 360°; and a vehicle wheel (30) mounted and fixed through both end portions in the fixing housing, wherein the fixing housing (20) is provided with a protruding portion (24) formed to extend inwards to have a predetermined thickness from both inner side surfaces, a central area of the vehicle wheel (30) formed as a sinking portion (32) which can correspond to the protruding portion (24) such that coupling between the fixing housing and the vehicle wheel is guided by engagement between the protruding portion and the sinking portion, a coupling member not exposed on both outer side surfaces of the fixing housing but arranged to sink in a space provided by the protruding portion (24) when the coupling member (25) crossing the fixing housing (20) and the vehicle wheel (30) is arranged to be led in, and both ends of the coupling member not protruding with respect to both outer side surfaces of the fixing housing. |
