| 摘要 |
1. Lock and automatic rewind switch device for a flexible steel measure adapted to be rewound in a case by a return spring, which comprises eccentric means constituting the lock shoe, said means being formed integrally with the pivot pin extending parallel to the direction in which the tape is pulled out from the case, said pivot pin being furthermore an integral part of a control member disposed externally of the case and extending through a hole in a side wall of said case, said pivot pin and control member forming a 90-degree angle with each other, said angle having a truncated vertex, said eccentric means being adapted to be moved by actuating said control member from a first position in which said control means lock said tape against a fixed portion of said case to a second position in which said tape is released, wherein said pivot pin (10) comprises in its area adjacent said truncated vertex an annular journal (14) which is a free fit in a bearing consisting of said hole (8) formed through said side wall (7) of the case, adjacent the slot through which the flexible tape is pulled out from the case, said annular journal (14) having a flat surface (15) on its inner side which is directed inwards of said 90-degree angle, the corresponding surface (24) of said control member (11) being completely flat, said control member (11) having a cross section smaller than the diameter of said hole (8), the arrangement being such that said pivot pin and control member assembly can be fitted in position from inside the case (1), said control member extending at right angles through said holes (8) and being subsequently adapted to rotate through 90 degrees so that is flat surface (24) can engage the outer surface of said side wall of the tape measure case, said annular journal (14) engaging said hole (8), said pivot pin (10) extending at right angles to said side wall (7) of case (1) and parallel to the top surface of the tape (2) and the free end (16) of said pivot pin (10) being supported by a bearing (17) formed on the inner face of the opposite side wall (4) of said case (1). |
