Screwdriver with adjustable length

Abstract

The invention relates to a screwdriver with adjustable length, which includes a handle. One end of the fixed cavity is provided with an annular support protrusion, and a connecting sleeve, a supporting sleeve and a fixed sleeve are sequentially arranged in the fixed cavity, wherein one end of the connecting sleeve In contact with the supporting protrusions, a number of bar-shaped protrusion keys are arranged in a circular array on the inner wall of the connecting sleeve; the fixed sleeve is fixedly connected with the inner wall of the fixed cavity through threads, and a top cover is also connected through threads on the inner wall of the fixed sleeve; There are several bar-shaped grooves corresponding to the protruding keys on the head. The side of the bar-shaped groove corresponding to the end of the cutter head is an open structure. The cutter head is slidably connected with the connecting sleeve through the bar-shaped grooves. The top block, the top block is located between the end of the cutter head and the top cover, the top block is a telescopic rod structure, the top block includes a fixed base block and a sliding block, the fixed base block includes an annular protrusion connected to the inner wall of the fixed sleeve, and the fixed base block A sliding hole is arranged in the middle part, and a sliding bar corresponding to the aforementioned sliding hole is fixed on the sliding block.

Description

technical field [0001] The invention relates to a screwdriver with adjustable length, which belongs to the field of hardware tools. Background technique [0002] As a derivative of a screwdriver, the multifunctional screwdriver is widely used in dismantling complex equipment because of its replaceable head structure. However, the traditional multifunctional screwdriver has a magnetic head or a spring coil For clamping type positive installation, the cutter head is installed on the screwdriver handle through the installation hole in front of the handle, and the cutter head is easy to disengage due to excessive pulling force, so the cutter head is easy to fall into the screwdriver handle. Inside the device, difficult to remove. Contents of the invention [0003] The technical problem to be solved by the present invention is: to overcome the technical problem in the prior art that the bit of the multifunctional screwdriver is easy to fall off, and to provide a length-adjusta...

AI Technical Summary

Problems solved by technology

[0002] As a derivative of a screwdriver, the multifunctional screwdriver is widely used in dismantling complex equipment because of its replaceable head structure. However, the traditional multifunctional screwdriver has a magnetic head or a spring coil For clamping type positive installation, the cutter head is installed on the screwdriver handle through the installation hole in front of the handle, and the cutter head is easy to disengage due to excessive pulling force, so the cutter head is easy to fall into the screwdriver handle. inside the device, difficult to remove

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