Patent ID: 8853543

Claim:
A fixing device for fixing an end of a circuit board, said fixing device comprising: a casing defining a receiving space and having an open end communicating with said receiving space; a movable element extending into said receiving space and having an inner end, a protruding end protruding from said open end, and an engaging groove formed in said protruding end for receiving the end of the circuit board, said movable element being movable relative to said casing along a first direction to vary a protruding distance of said protruding end from said open end of said casing; a plurality of first positioning portions provided on one of said casing and said movable element and arranged along said first direction; and a second positioning portion provided on the other one of said casing and said movable element; said second positioning portion having a structure complementing each of said first positioning portions, said second positioning portion engaging interferentially and releasably a selected one of said first positioning portions along a second direction that is perpendicular to said first direction to restrict movement of said movable element relative to said casing; wherein said casing includes two spaced-apart positioning walls extending along said first direction, said movable element including two resilient arms respectively proximate to said positioning walls, said resilient arms being movable toward each other and away from said respective positioning walls along said second direction, said first positioning portions including two rows of notches provided respectively on said positioning walls, said second positioning portion including two engaging teeth provided respectively on said resilient arms.