| 摘要 |
<p>To obtain both a high braking torque and a more compact size in a rotary damper. A rotary damper 1 includes a housing 2 having an outer cylinder 6 and an inner cylinder 7 disposed concentrically, and a bottom plate 8 closing one end side in an axis line direction of the outer cylinder and the inner cylinder, in which a viscous fluid is filled in an annular liquid chamber 9; a rotor 3 having a cylindrical blade portion 21; an annular locking groove 16 extending in one of either a first portion 17 which is an outer peripheral surface of the inner cylinder and is disposed at an end edge portion on a side opposed to the bottom plate side, or a second portion 33 facing the first portion of an inner peripheral surface of the blade portion; a locking convex portion 32 projecting from the other of either the first portion or the second portion, and locked in the locking groove; an annular inside seal member 38 interposed between a portion on the outer peripheral surface of the inner cylinder and on the bottom plate side more than the first portion and the inner peripheral surface of the blade portion; and an annular outside seal member 37 interposed between a vicinity of the other end in the axis line direction on an inner peripheral surface of the outer cylinder, and an outer peripheral surface of the blade portion.</p> |
