| 摘要 |
PURPOSE:To comprise a dust protective seal interposed between a movable member and an axial member which supports the member movably freely so as to display performance to eliminate dust with simple structure. CONSTITUTION:The dust protective seal 8 interposed between the movable member 4 operated slidably or rotatably and the axial member 5 which supports the member 4 and which prevents dust 10a-10h from intruding between the sliding planes of both members is provided. The whole dust protective seal is formed with a porous elastic body. Furthermore, in the dust protective seal, porous holes 8a, 8b formed by being connected mutually are opened on the sliding plane side with the axial member. Furthermore, the sliding plane of the dust protective seal is always pressed on the plane to be slided of the axial member with a weak pressing force based on diameter dimension relation with a member which holds the seal or the axial member. The dust protective seal is formed with a soft synthetic resin material as the porous elastice body. |
