| 摘要 |
<p>A rotary draw bar used for drawing a case comprises a fixed rod (1), a fixed base (21, 22), a rotating shaft (3) and a telescopic rod (41, 42). One end of the fixed rod (1) is connected with the fixed base (21, 22). The rotating shaft (3) is arranged in an internal cavity of the fixed base (21, 22) and rotatably matches with the internal cavity. The telescopic rod (41, 42) is a hollow rod, of which a front end is in linking connection with the rotating shaft (3). A jumping bead device is arranged in a central hole at the front end of the telescopic rod (41, 42), and comprises a support (411), a push rod (412), a spring (413) and jumping beads (414). The support (411) is arranged in the central hole. The push rod (412) is arranged on the support (411) and slidingly matches with the support (411). The spring (413) is arranged inside the support (411). One end of the jumping bead (414) is connected with the spring (413), and another end of the jumping bead (414) is exposed out of the telescopic rod (41, 42). The fixed base (21, 22) comprises an inclined surface for the jumping bead (414) to slidingly contact and a location hole for the jumping bead (414) to be embedded in.</p> |
