Pen sleeve suitable for refills of different lengths and different thicknesses

The utility model relates to a pen sleeve suitable for refills of different lengths and different thicknesses, which belongs to stationary and office supplies and mainly solves the problem that the ordinary pen sleeve can not hold refills of any length and thickness. The pen sleeve comprises a lower sleeve, a threaded sleeve and an upper sleeve. The two ends of the threaded sleeve are open, the upper end of the threaded sleeve is provided with internal threads and connected with the upper sleeve provided with external threads, and the lower end of the threaded sleeve is provided with external threads and connected with the lower sleeve provided with internal threads; and the upper sleeve comprises a knob, external threads with lengths of 2 cm and a refill insertion slot. The position of the upper sleeve can be adjusted by adjusting the knob, so as to ensure the normal use of refills of different lengths; and the inner wall of the refill insertion slot is in a conical shape, so as to ensure the normal use of refills of different thicknesses. The pen sleeve provided by the utility model has a simple structure, and is economical and practical.