Abstract: The present disclosure provides a shoulder strap height adjusting mechanism including a seat pad and shoulder straps. The seat pad is provided with shoulder strap perforations through which the shoulder straps pass and shielding sheets located at the shoulder strap perforations. The shielding sheets shield the shoulder strap perforations and divide the shoulder strap perforations into an upper perforation and a lower perforation. A communication hole is formed between the two perforations, communicating the upper perforation and the lower perforation. Two shoulder strap perforations are arranged side by side on the seat pad, with two shielding sheets respectively located at two shoulder strap perforations. Two sliding straps are disposed in the two shoulder strap perforations and extend respectively along the height direction. The two shoulder straps pass through the two shoulder strap perforations respectively and are slidably connected to the corresponding sliding straps through fasteners.

Abstract: A connecting device for a child carrier, a child carrier and a child crib are provided. The child carrier includes a carrier body and an accessory, the carrier body including at least one first rod, the accessory including at least one second rod. The connecting device is configured to connect the accessory to the carrier body and includes: a fixing base connected to the second rod and configured to accommodate the first rod; an operating member slidably connected to the fixing base; and an engaging member connected to the operating member. The sliding of the operating member along the fixing base is capable of driving the engaging member to be switched between a locking position and an unlocking position.