Abstract: An adjustable bed post includes a telescoping structure with inner and outer tubes. The outer tube includes axially aligned movement slots and positioning slots. The inner tube includes positioning pins that engage the positioning slots for selective height adjustment. A retaining sleeve with radially outwardly extending tooth-shaped structures maintains alignment between the inner and outer tubes. An optional locking screw provides additional post-adjustment fixation. The design allows easy, tool-free adjustment, enhances structural stability, and simplifies manufacturing and assembly.

Abstract: A foldable bed including first and second support structures pivotally connected to each other; a plurality of bed boards comprising a back board and a first seat board hinged to the back board and fixed on the first support structure; a back lifting assembly comprising a back lifting bracket pivotally connected to the first support structure and abutting against the back board, and a back lifting actuator pivotally connected between the back lifting bracket and the first support structure to drive the back lifting bracket to pivotally move in an upward or downward rotating direction relative to the first support structure, which in turn drives the back board to rotate in a desired position. When the first and second support structures are folded, the plurality of bed boards are folded at the same time, thereby folding the foldable bed in a folded state.

Abstract: Described is a battery cover having upper and lower shells that can be coupled to each other to protect the battery's core and internal circuit board. The shells can be ultrasonically welded to provide at least one loop of continuous weld. Once welded together, the cover reduces battery's exposure to moisture and other external element leading to reduced electrical shorts and improved safety and efficiency.

Abstract: Described is a battery cover having upper and lower shells that can be coupled to each other to protect the battery's core and internal circuit board. The shells can be ultrasonically welded to provide at least one loop of continuous weld. Once welded together, the cover reduces battery's exposure to moisture and other external element leading to reduced electrical shorts and improved safety and efficiency.