| 摘要 |
The present invention relates to an extendable bar which includes a first extendable bar, a second extendable bar, and a locking device. The first extendable bar is connected to be able to slide in the second extendable bar. The locking device is installed at an end of the second extendable bar. A user is able to lock or unlock the first extendable bar in the second extendable bar with only one motion gripping or releasing the locking device. Since the extendable bar is able to be unlocked from the locking device by being gripped by a hand, the present invention is capable of improving the convenience of use for the user. Moreover, a locking surface, including a locking protrusion already used by the existing technology, is slightly expanded in a radial direction to form a guide surface, and then a self-structure of the locking protrusion is properly combined and used to enable a twist preventing function. Therefore, the present invention is capable of enabling the twist preventing function without an increase in processing construction methods, thereby effectively improving production processing efficiency. |
