Supporting module and projection device

A projection device, comprising:

• a bottom cover provided with at least three holes;
• at least three mask members disposed in the projection device and in one-to-one correspondence with the at least three holes, each one of the least three mask members comprising a protection wall and a surrounding wall;
• and
• at least three foot pad assemblies in one-to-one correspondence with the at least three mask members, and removably screwed to the at least three mask members respectively, each one of the least three foot pad assemblies comprising a rod and a foot pad;
• wherein, in each one of the least three mask members, the surrounding wall has a first end and a second end opposite to each other, the protection wall is located at the first end of the surrounding wall and connected to a periphery of the surrounding wall, the protection wall and the surrounding wall jointly define a channel, the channel extends along a first direction from the first end to the second end of the surrounding wall, the second end of the surrounding wall is connected to the bottom cover of the projection device and has an opening communicating with the channel, and the opening corresponds to one of the at least three holes of the bottom cover, so that the channel communicates with outside of the projection device;
• each one of the least three mask members has a first threaded portion;
• and
• wherein, in each one of the least three foot pad assemblies, the rod has a fixed end and a free end opposite to each other, the foot pad is fixed to the fixed end of the rod, the free end of the rod selectively extends into the channel through the opening corresponding thereto and the hole corresponding thereto, the rod has a second threaded portion;
• when the rod is screwed to the projection device, the second threaded portion of the rod and the first threaded portion of the mask member corresponding thereto are screwed to each other, and the foot pad is located outside the projection device.