Telescopic screwdriver has main body including core inserted into opening drilled through handle, screwdriver shaft inserted into core, and nut screwed to internal thread of core to hold screwdriver shaft in desired length

摘要

The screwdriver has a main body (1) including a core (11) inserted into an opening (101) drilled through a handle (10), and a screwdriver shaft (12) inserted into the core. The screwdriver shaft has protrusions (123) that slide along slots (111) formed on the sides of the core. A nut (13) can be screwed to the internal thread (112) of the core to hold the screwdriver shaft in desired length. The core has a receiving portion (110) for receiving the inserted screwdriver shaft. The protrusions are formed at the bottom end of the screwdriver shaft. The nut is screwed at the upper end of the core. The screwdriver shaft also has threads (122) screwed to the internal threads of the core.