| CPC B25B 23/0035 (2013.01) [B25B 21/02 (2013.01)] | 5 Claims |
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1. A socket adapter for an impact wrench, comprising:
a main body including a cylinder section having an engagement hole to be installed in an insertion square of the impact wrench, a shank section configured to attach or detach a socket, and a drum section positioned between the cylinder section and the shank section;
a ball locking mechanism configured to switch the socket between a locked state where the socket cannot be detached and an unlocked state where the socket can be attached and detached by protrusion and retraction of a ball housed in the shank section;
a manipulator ring having a tapered surface formed on its forward end side and inclined to expand an inner surface of the manipulator ring toward the forward end side and slidably fitted on the drum section in the axial direction and configured to control the protrusion and retraction of the ball; and
a starting resistance imparting means for increasing the starting resistance of the manipulator ring when the manipulator ring begins to slide from a locking position where the ball protrudes to an unlocking position where the ball retracts,
the starting resistance imparting means comprising
a groove formed in an outer periphery of the drum section and at a position that overlaps a forward end of the manipulator ring in the state where the manipulator ring is located in the locking position, and
a spring ring formed in a substantially C-shape and wound around the groove of the drum section, wherein in the state where the manipulator ring is located in the locking position, the spring ring protrudes from the groove of the drum section such that an inner diameter of the spring ring is larger than an outer diameter of a bottom of the groove, and the outer peripheral surface of the spring ring is in contact with the tapered surface of the manipulator ring to prevent the manipulator ring from moving to the unlocking position.
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