Portable stamp

A portable stamp comprising:

• a housing (10) having a tongue (11) formed at an open end thereof, an elongated slot (12) defined through an upper surface thereof, a first hole (13) and a second hole (14). respectively defined at two ends of the elongated slot (12), wherein a diameter of the holes (13, 14) is larger than a width of the elongated slot (12);
• a handle (20) having a sliding block (21) movably receiving in the housing (10), a bar (22) extending from the sliding block (21), a positioning opening (24) defined a top side of the sliding block (21), a lateral opening (23) defined at a side perpendicular to the top side of the sliding block (21) and in communication with the positioning opening (24), and a pivoting part (25) formed at a distal end of the bar (22);
• a character unit (30) pivotally mounted on the distal end of the bar (22), the character unit (30) having a pivot pin (31) provided at a back surface and inserted through the pivoting part (25), a torsional spring (33) provided on the pivot pin (31), a character plate (34) provided at a front surface of the character unit (30), and an ink sponge provided inside the character unit (30);
• a control unit (40) having a button (41) received in the positioning opening (24), and a resilient member (42) received in the lateral opening (23) and pressed against the button (41), wherein the button (41) has a cap (411) formed at a top end thereof, a middle part (412) below the cap (411) fitted into the positioning opening (24) with a diameter larger than the width of the elongated slot (12), and a neck (413) between the cap (411) and the middle part (412) with a diameter smaller than the width of the elongated slot (12);
• and
• a cover (50) installed on the open end of the housing (10).