| 摘要 |
<p>Disclosed is a bracket angle adjustment mechanism capable of achieving enhanced strength and lower production cost, based on improvement in a mounting position of a wedged-state release member. The bracket angle adjustment mechanism comprises a pair of wedge members 16A, 16B fitted in an eccentric space which is defined between a large-diameter hole 14c of an external-tooth gear 14 and a small-diameter shank 15c of an internal-tooth gear 15, and a wedged-state release member 19 is held by the external-tooth gear 14 in such a manner that an outer peripheral surface of the wedged-state release member 19 is rotatably fitted into the large-diameter hole 14c. The wedged-state release member 19 is formed with a clearance groove 19a for avoiding interference with the wedge members 16A, 16B, a wedged-state release portion 19e, and a mounting hole (noncircular hole) 19d non-rotatably fitted with an attaching portion (noncircular portion) of a control shaft 20 penetrating through the small-diameter shank 15c in a non-fitting manner.</p> |
