Patent ID: 8596196

Claim:
An adjustment wheel assembly of an adjustable stamp, comprising: an adjustment wheel unit having: a wheel base; multiple wheels parallelly and pivotally mounted in the wheel base; multiple printing types driven by the wheels; and a first pivotal part formed on a top edge of the wheel base; and a flip-up printing type cover unit pivotally connected to the wheel base of the adjustment wheel unit and having: a printing type cover covering the wheel base and having: a printing type holder; a through slot formed through the printing type holder and aligned to the printing types; a second pivotal part formed on one edge portion of the printing type holder and pivotally mounted to the first pivotal part of the adjustment wheel unit through a pivot shaft; a tab formed on another edge portion of the printing type holder; and a snap part formed on the edge portion on which the tab is formed; a torsion spring mounted on the pivot shaft and having two urging ends respectively urging against the printing type cover and the wheel base of the adjustment wheel unit; and a fastener having: a resilient piece taking a U-shaped form, and mounted on an outside of the wheel base of the adjustment wheel unit with one end of the resilient piece engaging the adjustment wheel unit; and an engagement piece mounted to the resilient piece with the other end of the resilient piece mounted through and fixed in a central portion of the engagement piece as so to be moveable relative to the wheel base of the adjustment wheel unit, and having an urging part formed on the central portion of the engagement piece and adapted to abut against a side of the adjustment wheel unit; an engagement part formed on a top end of the engagement piece and corresponding to the snap part of the printing type cover; and a pressing part formed on a bottom end of the engagement piece to control the engagement part to engage the snap part of the printing type cover or disengage from the snap part when the pressing part is pressed.