Lead replaceable pencil with bullet pencil lead

Abstract

The invention discloses a lead replaceable pencil with bullet pencil lead. A penholder of the lead replaceable pencil is provided with a lead storage tube inside. A spring with a tongue is sleeved outside a front end of the lead storage tube. The lead storage tube is provided with a long slot. A rear end of the long slot is provided with a step. The side opposite to the long slot is provided witha short slot. A front part of the lead storage tube is a single-layer tube, and a rear part of the lead storage tube is a double-layer tube. A buninoid bulge is arranged above the step at the rear end of the long slot. An inner cavity of the penholder and an outer tube of the lead storage tube cannot be relatively rotatably matched so as to prevent the spring tongue from dislocating from the longslot. A rear end of the short slot is provided with a large hole, so that the spring tongue enters the large hole to prevent the pencil lead from retracting. A non-skid limit part is arranged betweenthe lead storage tube and the penholder. Therefore, both the appearance and the performance of the lead replaceable pencil can be accepted by users and the lead replaceable pencil really becomes a substitute product for a wooden pencil.

Description

Technical field [0001] The invention relates to a writing instrument, in particular to a refill pencil with a bullet-point pencil lead. Background technique [0002] The thick-core pencils currently in use are still dominated by wooden pencils. Wooden pencils consume wood and have the trouble of cutting. Therefore, there was the invention of the bullet-point-for-core pencil. The pencil core processed into the shape of the bullet was placed in the core storage. In the tube, the front section of the core tube is covered with a tongue spring. When the core tube is pushed, the tongue of the spring moves the pencil core to realize the replacement of the pencil core one by one. This product was once all the rage. Since the inner diameter of the core tube can only be slightly larger than the pencil lead, otherwise the pencil cores overlap and the tube wall is too thick and difficult to produce, so the core tube can only be thinner. Since the replacement of the pencil lead requires push...

AI Technical Summary

Problems solved by technology

Since the replacement of the pencil lead needs to push the storage tube through a long stroke, the storage tube that meets the stroke must be exposed outside the pen holder, and the thickness of the storage tube and the pen holder is quite different, which is not suitable for people's aesthetic requirements; Due to the imperfect structure of the product, there are problems such as the dislocation of the spring tongue and the retraction of the pencil lead, and the assembly of the pencil lead will stain the fingers black, so it gradually disappears in the market

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