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) for printing 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, two ends of the fixed shaft (7) pass through vertical grooves (20) on vertical walls at two sides of the middle frame (2) respectively and are supported on the vertical walls at two sides of a lower portion of the seal housing (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 an 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 an 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;
- wherein the drive mechanism (5) comprises a gear mechanism (58) and a positioning wheel (59) which are mounted on the two ends of the fixed shaft (7) projecting from a central part of the seal body (4) respectively;
- the gear mechanism (58) comprises a gear (581) and a one-way bearing (582), and the one-way bearing (582) has an inner ring which is sleeved on one end of the fixed shaft (7) slidably and is fixed on one of the end surfaces of the seal body (4), the gear (581) is sleeved on an outer ring of the one-way bearing (582) tightly and is integrated with the one-way bearing (582), a rack (200) is fixed on the vertical groove wall of the vertical groove (20) which is at the same end of the middle frame as the gear (581);
- the gear mechanism (58) engages with the rack (200);
- when the seal housing (1) is depressed, the gear (581) will rotate downwards along the rack (200) to drive the outer ring of the one-way bearing (582) rotate and the seal body (4) will not rotate;
- when the seal housing (1) is relaxed, the gear will move upwards along the rack (200) and rotate, the one-way bearing (582) will be locked and can not rotate, therefore the inner ring, the outer ring and the seal body (4) will rotate by one-third or one quarter of circumference;
- the positioning wheel (59) is mounted on the fixed shaft (7) at an other side of the seal body (4), three or four projecting ribs (590) are distributed uniformly on a tubular outer wall of the positioning wheel (59), recessed positioning grooves (591) are arranged on an end surface of the projecting ribs (590) which faces towards the vertical wall of the seal housing (1), projecting positioning ribs (12) fitting with the positioning grooves (591) of the positioning wheel (522) are arranged on the vertical wall of the seal housing (1) correspondingly.