Automatic pen capable of opening and closing refill protecting device without action

Abstract

The invention discloses an automatic pen capable of opening and closing a refill protecting device without an action. According to the invention, the key technical point is that a retractable sleeve rod is sleeved in a pen barrel; a refill is sleeved in the retractable sleeve rod; the retractable sleeve rod is connected with a push rod through a magnet on the retractable sleeve rod; an elastic retractable sleeve rod upper clamping buckle and an elastic retractable sleeve rod lower clamping buckle are arranged on the wall of the upper pen barrel and correspond to a recess and a longitudinal toothed groove in the upper part of the retractable sleeve rod; a rubber sleeve is arranged outside the lower pane barrel; and a hydraulic oil is full of a space formed between the rubber sleeve and the outer wall of the pen barrel; when the pen is held by hand to push the hydraulic oil, the push rod is upwardly pushed by the hydraulic oil to move upwards, the retractable sleeve rod is driven by the magnet to move upwards and a pen head protective sleeve connected to the bottom end of the retractable sleeve rod retracts upward, so that the pen head is exposed to provide convenience for writing; and when the hand is released, the retractable sleeve rod moves downwards to recover the original shape and the pen head is concealed. According to the invention, a purpose of automatically opening the refill protecting device and automatically closing the refill protecting device is achieved and the writing efficiency is increased.

Description

technical field [0001] The invention belongs to writing instruments, in particular to an automatic pen which opens and closes a pen core protection device without action. Background technique [0002] Under normal circumstances, in order to ensure that the refill nib is not damaged and durable, we must install a refill protection device on each pen, such as using a pen cover, or using a button on the top of the pen to extend or retract the refill into the pen holder Inner way. But no matter which method is adopted now, the following two points need to be done: before use, the pen core nib is exposed, and after use, it is operated again to hide the pen core nib. If the first step is missing, we can't write, and if the second step is to expose the tip of the pen core, the pen core cannot be protected well, and the pen core will easily come into contact with other objects. For example, if you accidentally drop the pen on the table and drop it on the ground, the refill is dama...

AI Technical Summary

Problems solved by technology

If the first step is missing, we cannot write, and if the second step is missing, the tip of the pen core will not be exposed, and the pen core will not be well protected, and the pen core will easily come into contact with other objects.

For example, if you accidentally drop the pen on the table and drop it on the ground, the refill is damaged and you cannot write, or you put the pen in the pencil case or clamp it on the clothes, and the ink leaks and contaminates the stationery and clothes, etc.

This phenomenon of forgetting to operate the second step, for some careless people or young students, happens from time to time, which brings some inconvenience to their study and also brings some unnecessary waste

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