Patent ID: 6521045
Filing Date: 2003-02-18
Classification: B65H,Y10T

Abstract:
A clutch mechanism of coat film transfer tool comprising:a feed reel with a coat film transfer tape wound thereabout and a take-up reel for collecting the coat film transfer tape after use, the feel reel and take-up reel rotatably provided in a case that is held and manipulated by one hand, the take-up reel cooperates with the feed reel in the case to synchronize a feed speed and take-up speed of the coat film transfer tape in both reels, power transmission means is provided between a tape winding portion for winding up the coat film transfer tape and a rotary drive unit for rotating and driving the tape winding portion, the power transmission means is composed in at least one of the feed and take-up reels, and has a compressible friction member interposed between confronting first axial end surfaces of the tape winding portion and the rotary drive unit, the rotary drive unit including a rotary shaft, the tape winding portion including a driven member arranged concentrically about the rotary shaft for rotation thereabout, wherein the driven member is disposed to compress the compressible friction member in a first axial direction to cause a frictional engagement state between the confronting first axial end surfaces of the tape winding portion and the rotary drive unit, the compressed friction member urging the driven member in a second axial direction opposite the first axial direction to cause confronting second axial end surfaces disposed axially apart from the confronting first axial end surfaces to engage with each other while retaining the frictional engagement state, and wherein power transmission of the power transmission means is from a frictional force caused by a thrust load between the tape winding portion and the rotary drive unit, and is connected and disconnected by a difference in torque therebetween, the thrust load, which causes the frictional force, is set by predetermined relational dimensions of the tape winding portion and the rotary drive unit in the axial direction between the tape winding portion and the rotary drive unit defined by direct and axial engaging of axial engaging portions formed in the tape winding portion and the rotary drive unit.