| 摘要 |
A rack mechanism includes a sliding rail, a cabinet, three first fixed beams, a guide rail, two rods, and four roller assemblies. The cabinet includes a top portion, which includes a lid defining four holes. The bottom portion slidably connected to the sliding rail. The three first fixed beams parallelly arranged above the top portion. The guide rail is fixed to the first fixed beams. The two rods are arranged under the lid. Each two of the four roller assemblies are respectively connected to the two rods. Each roller assembly includes a shelf and a pulley. One end of the shelf passes through one of the holes to fix the shelf to the rod. The pulley is arranged to the other end of the shelf. The pulley rolls along the guide rails when the bottom portion slides along the sliding rails.
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