The invention discloses a direct liquid type mark pen, and relates to the technical field of mark pens. The connecting stability of the upper end of the pen body and the limiting
barrel can be guaranteed under the cooperation of the sinking groove and the wedge-shaped block, the pen body and the limiting
barrel are prevented from falling off, the connecting stability of the limiting
barrel and the
water storage core can be further improved under the cooperation of the two round protrusions, and the pen can be conveniently stored if falling and other situations occur in the
actual use process. Damage to the pen main body caused by falling of the pen main body and the
water storage core is avoided, the protection effect is good, and the service life is long; the connecting stability of the storage cylinder and the pen cap can be guaranteed through threaded connection, splitting is convenient, the outer
diameter of the part, located above the pen cap, of the storage cylinder is larger than the inner
diameter of the pen cap, the storage cylinder can be prevented from axially moving in the pen cap, the storage cylinder, the pen cap and the
water storage core are stably connected, the ink outlet effect is improved, and meanwhile the ink outlet effect is improved. The two ends of the water guiding refill are not prone to being damaged, and the actual service life is guaranteed.