Patent ID: 8672283

Claim:
A projection device, comprising: a turntable module, comprising: a first turntable, disposed on a surface and having an annular rib; and a second turntable, disposed on the first turntable and having an annular groove, connected to the first turntable, and rotating relative to the first turntable by revolving along a rotation axis, wherein the annular rib is slidably disposed in the annular groove, and the second turntable rotates relative to the first turntable by revolving along the rotation axis through the annular rib sliding in the annular groove; a projection module, disposed on the turntable module and fixed to the second turntable, wherein the second turntable has a tenon and the projection module is fixed to the second turntable through the tenon; and a pad, disposed on the annular rib, and the annular groove having a protrusion portion located between two opposite sidewalls of the annular groove and contacting the pad, wherein when the second turntable rotates relative to the first turntable, the protrusion portion slides along the pad.