Abstract: A material carrying mechanism includes a base, a tray and an adjustment assembly. The tray is movably mounted on the base, and the adjustment assembly is mounted on the base. The adjustment assembly includes a first ejection member and a first elastic restoring member. The first ejection member includes a first telescopic portion abutting against the tray. The first telescopic portion can perform a telescopic movement in a first direction to push the tray to move in the first direction. The first elastic restoring member is connected between the base and the tray, so as to provide to the tray a restoring force directed to the first ejection member.

Abstract: An anti-misplug detection mechanism may include: a plurality of first communication interfaces, and anti-misplug detection assemblies. The plurality of first communication interfaces may be used to be mutually plug-in connected to second communication interfaces on the code scanners one to one to form a plurality of code scanner plug-in assembly groups; and the anti-misplug detection assemblies may be arranged in groups with the first communication interfaces, and include a first matching structure, a second matching structure and a detector. The first matching structures and the first communication interfaces may be relatively fixed one to one, the second matching structures may be connected to the code scanners one to one through connecting elements, and a first mistake-proofing feature and a second mistake-proofing feature of the same group may be matched with each other.