The utility model provides a mouth moving device and relates to the technical field of toys. The utility model relates to a
cam structure, which comprises a shell, an
upper lip component, a
lower lip component, a
cam structure, a driving component and a resetting component, the front end of the
upper lip component and the front end of the
lower lip component are movably connected with the shell, and the front end of the
upper lip component is positioned above the front end of the
lower lip component; the middle of the upper lip
assembly and the middle of the lower lip
assembly are movably connected and both movably connected with the shell, the rear end of the upper lip
assembly is located below the rear end of the lower lip assembly and both make contact with the
cam structure, the cam structure is in transmission connection with the driving assembly, and the driving assembly is connected to the shell. The reset assembly is connected with the upper lip assembly and the lower lip assembly. The upper lip assembly and the lower lip assembly can be combined to form a scissor-shaped structural form, and can move simultaneously in the
mouth opening process in cooperation with the lever principle, so that the
mouth opening amplitude is greatly improved, the working current of the driving assembly can be reduced, and more
electricity is saved.