Marking pen

Abstract

The invention discloses a marking pen applicable to writing on a white board. The marking pen comprises a pen holder with a pen holder cavity, a tail cover rotationally jointed at the tail end of the pen holder, a refill mounted at the front end of the pen holder and a wrapping core mounted at the front end of the pen holder cavity, the tail end of the refill is inserted into the wrapping core, a control valve is arranged at the tail end of the refill, a sealed ink storage cavity is formed between the control valve and the tail cover, a small ball is placed in the ink storage cavity, the control valve comprises an ink guiding rod, a sealing cover and a spring, a plurality of elongated grooves are formed in the sidewall of the sealing cover, a conical boss is arranged on the ink guiding rod, the spring is sleeved on the ink guiding rod behind a step, the sealing cover is fixedly connected in the pen holder cavity, the ink guiding rod is positioned in a sealing cover inner cavity, the conical boss is enabled to be in contact with and sealed with an end portion hole of the sealing cover inner cavity under the action of the spring, and the front end of the ink guiding rod extends out of the end portion hole of the sealing cover inner cavity and is in contact with the tail end of the refill. The marking pen of the structure is simple in structure, convenient to use and smooth in ink outflow.

Description

technical field [0001] The invention relates to a writing instrument, in particular to a marking pen suitable for writing on a whiteboard. Background technique [0002] As a kind of writing instrument, marker pen is quite common in its use. Current marking pens include a penholder with a penholder cavity, a pen core installed at the front end of the penholder, and a roll core installed at the front end of the penholder cavity. The ink can be stored in the roll core, and the tail end of the pen core is inserted into the roll core. The tail end of the pen holder cavity is provided with a closed hard ink sac. The ink sac and the inner wall of the pen holder cavity are airtight and can move axially along the inner wall of the pen holder cavity. The sealing seat, the sealing seat is fixedly connected in the pen holder cavity, and the inner wall of the ink bag, the sealing seat and the pen holder chamber forms an independent chamber, and a sponge ring for supporting the ink bag ...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantage of the marker pen with the above structure is that the internal structure of the marker pen is relatively complicated. During the writing process, when the ink on the pen core cannot meet the writing requirements, it is necessary to interrupt the writing and press the ink bag before continuing to write, which is a waste of time. , the marker pen is inconvenient to use; in addition, after the marker pen is placed for a period of time, the ink in the pen will precipitate, which will affect the smoothness of ink in the process of use

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