Drillable propelling pencil

Abstract

A drill-type propelling pencil. The invention belongs to the field of stationery technology, and relates specifically to one kind of propelling pencil capable of drilling pencil lead. A screw thread is arranged in the outer sleeve rod of the pencil, an inner sleeve rod with a longitudinal groove is arranged in the outer sleeve rod, a centering block and a core-pushing screw block are arranged in the groove of the inner sleeve rod, the lead core is positioned in the centering block, the screw threads on the outer wall of the core-pushing screw block are meshed with the screw threads in the outer sleeve rod under a working state, the center of the core-pushing screw block is provided with a lead core clamping opening, the front end of the inner sleeve rod is connected with the pen point, andthe rear end is connected with a pull cap arranged behind the outer sleeve rod. The drill-type propelling pencil has the advantages of simple and reasonable structure, firm and stable lead core clamping, no easy snap of the lead core and saving of wood resources.

Description

technical field [0001] The invention belongs to the technical field of stationery, and in particular relates to a mechanical pencil capable of drilling the lead of a pencil. Background technique [0002] Traditional propelling pencils all open the lead holding hole by squeezing, and rely on gravity to make the lead stick out. The way the lead core is released determines that the clamping force cannot be very large, otherwise the lead core will be difficult to move, and the resulting problem is that the lead core is easy to shake during the writing process, which affects the writing quality, especially for young children. For the students, it will affect the writing habits of the whole life, and the pen core will often be broken, which affects the teaching of the school and the learning of the students. For this reason, many schools do not encourage students to use mechanical pencils, and there is a huge waste of resources when using wooden pencils, and a large amount of tre...

AI Technical Summary

Problems solved by technology

The way the lead core is released determines that the clamping force cannot be very large, otherwise the lead core will be difficult to move, and the resulting problem is that the lead core is easy to shake during the writing process, which affects the writing quality, especially for young children. For students, it will affect the writing habits of a lifetime, and often break the refill, which affects the teaching of the school and the learning of the students.

For this reason, many schools do not encourage students to use mechanical pencils, and there is a huge waste of resources when using wooden pencils, and a large amount of trees will be cut down every year.

Images