Patent ID: 6932885

Claim:
A vacuum device comprising: a driven body provided within a vacuum chamber; a driving means provided outside said vacuum chamber, which rotates and moves up/down said driven body; and a drive shaft connecting said driven body to said driving means to transmit a drive force of said driving means to said driven body, further comprising: a first annular body secured to said drive shaft inside said vacuum chamber, which rotates around an axial center thereof; a second annular body rotatably supported by said first annular body and moving up/down with said first annular body as one body; a bellows capable of expanding/contracting, which is provided within said vacuum chamber so as to airtightly seal the periphery of said drive shaft, with one end thereof secured to said second annular body and with another end thereof secured to an inner wall of said vacuum chamber; and a first seal member provided between said drive shaft and said second annular body.