But carry telescopic link automatic brake steel tape

The utility model discloses a but carry telescopic link automatic brake steel tape, including diameter tape with connect in diameter tape's telescopic link, diameter tape includes and is fixed in thecasing pivot in the casing, rotate the overcoat in the disc spring between chi dish and pivot is connected to the chi dish of pivot, twine in the tape measure of chi dish to and set up be used for locking chi dish pivoted locking mechanical system in the casing, locking mechanical system include elastic connection in ungulate iron in the casing attracts with being used for can not only the measuration length of ordinary object of the electro -magnet of the tight chi of ungulate iron clamp dish, this steel tape can be measurationed difficult being close to or the high object length that can't measuration of higher ordinary steel tape measure in addition. 本实用新型公开了种携带伸缩杆可自动制动钢卷尺，包括卷尺本体和连接于所述卷尺本体的伸缩杆；所述卷尺本体包括壳体，固定于所述壳体内的转轴，转动外套于所述转轴的尺盘，连接于尺盘与转轴之间的盘式弹簧，缠绕于所述尺盘的卷尺，以及设置于壳体内用于锁定尺盘转动的锁定机构；所述锁定机构包括弹性连接于所述壳体内的蹄形铁和用于吸引所述蹄形铁夹紧