Extensible pencil with bullet pencil leads discharged by pressing

Abstract

The invention discloses an extensible pencil with bullet pencil leads discharged by pressing. The extensible pencil comprises a penholder, wherein the penholder is internally provided with an accommodating channel capable of accommodating the bullet pencil leads; one end of the penholder is provided with a pressing piece capable of driving the bullet pencil leads accommodated in the accommodating channel to move along the axial direction of the penholder; the pressing piece is correspondingly provided with a reset spring; the penholder is internally and correspondingly provided with a clamping and propelling mechanism and a retraction prevention device; the extensible pencil further comprises a one-way lead inlet channel, supplementary bullet pencil leads are limited to enter the one-way lead inlet channel in a manner that sharp ends enter firstly and then tail ends enter; an inlet end of the one-way lead inlet channel is arranged on the pressing piece; an outlet end of the one-way lead core channel is communicated with the accommodating channel; the one-way lead inlet channel is internally provided with a necking component which can be radially strutted under the effect of strong forces; the bore diameter of the necking component is smaller than the diameter of the tail ends of the bullet pencil leads. The extensible pencil has the advantages of reliable structure, reasonable design and simplicity and convenience in lead replacement.

Description

technical field [0001] The invention relates to a stationery product, in particular to a sharpening-free pencil, the pencil lead of which is free of sharpening and can be replaced. Background technique [0002] Pencils are commonly used stationery by students. Ordinary pencils need to be constantly cut during use, and the nib needs to be repaired frequently. It takes time and effort to sharpen the pencil, and it is inconvenient to use. Therefore, it is gradually replaced by the sharpening-free pencil with bullet lead. [0003] One type of bullet pencil currently on the market is to divide the bullet lead into a number of pointed pencil sections and connect them up and down to form a sharpening-free pencil. Since the pencil is fixed by clamping up and down, it is easy to appear due to the weak connection. Breaking affects writing, and if the number of pencil sections is small, the pencil formed is too short and inconvenient to hold. [0004] In addition, there is also a kin...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a non-sharpening pencil that has a reliable structure and can conveniently replenish the bullet lead without removing the cap. The propelling pencil is provided with a single To the core inlet channel, only the tip of the bullet lead core is allowed to be inserted first, which solves the problem in the prior art that the lead core end of the bullet head is inserted into the core storage tube first due to operational errors, and the pencil cannot be cored normally.

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