|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 11|
Disclosed are: a caster mounted on a teaching aid including a whiteboard, or furniture, etc. so as to conveniently and stably convert between a movement state and a stopping state; and a whiteboard including the caster. The caster is mounted on a pedestal fixed to the lower end of a column frame on which the whiteboard is mounted.
1. A caster mounted on the underside of a teaching aid or a piece of furniture, the caster comprising: a wheel coupled to the lower end of a fixing shaft having a male screw formed on the upper periphery thereof in such a manner as to be fastened to a nut;moving means having a slide member having a shaft hole punched on the center thereof in such a manner as to pass the fixing shaft of the wheel therethrough and an operating shaft hole formed on the circumferential surface thereof and an eccentric rotation member having an eccentric shaft formed at one s...