Integrated overprint colorful seal with multiple printing surfaces

An integrated overprint colorful seal with multiple printing surfaces, comprising a seal housing (1), a middle frame (2) accommodated in the seal housing (1), a spring (3) squeezed between the seal housing and the middle frame, wherein the integrated overprint colorful seal further comprises a seal body (4) in a regular triangular prism or a quadrangular prism shape, and a driving mechanism (5);

• each side surface of the seal body (4) in the regular triangular prism or quadrangular prism shape is a printing surface (60) in a different color;
• a fixed shaft (7) passes through centers of two end surface (42) of the seal body (4) which are parallel to each other, the two ends of the fixed shaft (7) pass through the vertical grooves (20) on the vertical walls at two sides of the middle frame (2) respectively and are supported on the vertical walls at two sides of the lower portion of the seal body (1), so that the seal body (4) is suspended in the middle frame (2);
• the drive mechanism (5) is mounted at both ends of the fixed shaft (7), wherein a ratchet (510) or gear (581) of the drive mechanism (5) is fixed on one end surface (42) of the seal body (4), and a pawl (512) or rack (200) which engages with the ratchet (510) or gear (581) to drive the seal body (4) to rotate is fixed on the middle frame (2);
• when the seal housing (1) is not depressed, the spring (3) is in an extended state and the printing surface (60) in one color of the seal body (4) faces downwards;
• when the seal housing (1) is depressed, the spring (3) will be squeezed, the seal body (4) will be moved downwards along the vertical grooves (20) on the vertical walls at two sides of the middle frame (2) with the fixed shaft (7) until the printing surface (60) in the one color prints on a target;
• when the seal housing (1) is relaxed, the seal body (4) will be moved upwards with the fixed shaft (7) while the driving mechanism (5) will drive the seal body (4) to rotate about the axis of the fixed shaft (7) until the printing surface (60) of the seal body (4) in another color faces downwards;
• when the seal housing (1) is depressed again, the printing surface (60) in another color will overprint on the existing printed pattern on the target, and so forth, colorful printed pattern will be presented on the target after the printing surfaces (60) in three colors or four colors are overprinted.