Patent ID: 6925933

Claim:
A portable stamp comprising: a housing ( 10 ) having a hollow body with a U-like tongue ( 11 ) formed at an open end of the housing ( 10 ), an elongated slot ( 12 ) defined through an upper side of the housing, a first hole ( 13 ) and a second hole ( 14 ), both of which have a diameter that is larger than a width of the elongated slot ( 12 ), the first hole ( 13 ) and second ( 14 ) respectively defined at two ends of the elongated slot, and a notch ( 15 ) defined between two opposite sides of the tongue ( 11 ); a handle ( 20 ) having a sliding block ( 21 ) movably mounted in the housing ( 10 ), a bar ( 22 ) extending from the sliding block ( 21 ) and adjacent to the upper side of the housing ( 10 ), a seat ( 23 ) formed beneath the bar ( 22 ) and shorter than the bar ( 22 ), a space ( 24 ) defined between the bar ( 22 ) and seat ( 23 ), a positioning opening ( 25 ) defined at a top side of the sliding block, and a lateral opening ( 26 ) defined at a side perpendicular to the top side and in communication with the positioning opening ( 25 ); a character unit ( 30 ) pivotally mounted at a distal end of the bar ( 22 ) by a first pivot pin ( 32 ), the character unit ( 30 ) having a first torsion spring ( 33 ) provided outside the first pivot pin ( 32 ), and a character plate ( 31 ) formed at a front surface of the character unit ( 30 ) opposite to the first pivot pin ( 32 ); an ink pad ( 40 ) pivotally mounted at the seat ( 23 ) by a second pivot pin ( 42 ), the ink pad ( 40 ) having a second torsion spring ( 43 ) provided outside the second pivot pin ( 42 ), an ink sponge ( 41 ) received in the ink pad ( 40 ) and facing the character unit ( 30 ) and abutting the character plate ( 31 ); and a control unit ( 50 ) having a button ( 51 ) inserted in the positioning opening ( 25 ) and extending out from the elongated slot ( 12 ), and a resilient member ( 52 ) received in the lateral opening ( 26 ) and pressed against the button ( 51 ), wherein the button ( 51 ) has a lug ( 511 ) formed at a top of the button ( 51 ), a neck ( 513 ), with a diameter substantially equal to the width of the elongated slot ( 12 ), formed beneath the lug ( 511 ) and movable along the elongated slot ( 12 ), and a stem ( 514 ), with a diameter substantially equal to the diameter of either the first or second hole ( 13 , 14 ), the stem ( 514 ) formed beneath the neck ( 513 ).