Ruler core structure

The utility model discloses a ruler core structure which comprises a ruler core seat, a ruler core cover and a core column, the ruler core seat is provided with a plurality of clamping feet, the ruler core cover is provided with clamping grooves matched with the clamping feet, the core column is clamped between the ruler core cover and the ruler core seat, the two ends of the core column are provided with connecting blocks, and the connecting blocks are connected with the ruler core seat. The outer side of the tape core seat is provided with a mounting seat, the mounting seat is provided with a through hole, and the through hole is internally provided with an adjusting piece for adjusting the rotation of the core column. The tape core structure is different from the prior art, through the cooperative use of the adjusting piece and the elastic piece, when the elastic force of the tape spring on the core column is too loose or too tight when the tape is used for a long time, the tape core can be adjusted; when