| 摘要 |
PURPOSE: Provided is a roller assembly which assembles a roller at both rear axes of bottom piece so that it increase convenience in combining or separating the roller by one touch. CONSTITUTION: The roller assembly comprises the parts of: a spring fixing hole and a stopping hole which are penetrated at the upper middle and both sides of a base frame(2); a bracket(3) which embeds a bearing metal(3a); a cover(6) which is combined on the bracket; a spring which is included in the bracket to form a suspension part; a suspension lock which is inserted into a fixed iron and a working iron; and a release tool(13) which places a rotation tool at the bracket.
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