| 摘要 |
The invention relates to a device in a cable tie (1). This comprises an elongate tie part (2), which at one end has an elongate insertion part (3) and at its other end a locking head (4). The latter has a through-passage (6) for the tie part (2), and a slit (7) in one transverse wall of the opening, for inserting the insertion part (3) into the passage (6). Interacting members are provided on the tie part (2) and in the locking head (4) for locking the tie part (2) in relation to the locking head (4) after inserting the former. The said locking members comprise a ridge pattern arranged on the tie part (2), and a locking element (9) supported by a flexible stalk (8) arranged centrally at the bottom of the passage (6). The surface of the locking element (9) facing the slit (7) is divided into two halves (9a, 9b) by an elevation (10), aligned transversely to the slit and arranged above the stalk (8), the elevation having a cross-section in the shape of an isosceles triangle. The halves (9a, 9b) have laterally inverted patterns of ridges. The pattern of the half situated beyond the elevation (10) in the tightening direction of the tie part (2) is always of a complementary shape to the ridge pattern on the tie part (2). The said pattern is arranged on both sides of the tie part (2) and is made up of ridges (11) having a triangular cross-section and arranged across the tie part (2) at equidistant intervals from one another. The sides of the said ridges in the tightening direction of the tie part (2) have a smaller angle of inclination than that of the opposite ridges sides. The elevation (10) is designed when tightening the tie to raise the latter so that, due to raising of the tie and the angle of inclination of the ridges (11, 9) of the tie and the locking element, locking between the tie and the locking head (4) is prevented. When attempting to move the tie part (2) in an opposite direction to the tightening direction, the elevation (10) is brought into engagement with one of the ridges (11) of the tie part (2). This causes the stalk (8) to flex, and the ridges of the tie part (2) and of the locking element (9) situated beyond the elevation (10) in the tightening direction are thereby made to engage in one another, thus locking the tie part (2) in relation to the locking head (4).
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