Patent ID: 7278867

Claim:
A displacement control device for an extractable power supply comprising: a) a power supply having: i) a rectangular outer casing having an upper surface, a lower surface, and a side surface, each of the upper surface and a lower surface having one of two connection holes located therein, the side surface having a locking slot; ii) a handle having an upper arm and a lower arm extending transversely, and a grip extended vertically between the upper arm and the lower arm, each of the upper arm and the lower arm have one of two U-shaped grooves located on an end thereof and one of two shaft holes, an exterior surface of the grip of handle has a concaved pin having a projected part; iii) a spring having a through-hole located in a center thereof, a fixing piece protruding inwardly from a periphery of the through-hole and extending outwardly from the through-hole, and a projection piece protruding from a first end of the spring, the fixing part is connected to the projected pin of the concaved part, the projection part is selectively inserted into the locking slot located in the side surface of the rectangular outer casing; and iv) two shaft pins, each of the two shaft pins being inserted through one of the two shaft holes and a corresponding one of the two connection holes and pivotally connecting the handle to the rectangular outer casing; and b) a casing having at least one rectangular slot having two pillars located on opposing surfaces of an interior thereof, the power supply is removably inserted into the at least one rectangular slot, wherein a front wall and a rear wall of each of the two U-shaped grooves exerting a force and frictionally sliding on an outer circumference of one of the two pillars, when the handle is pivoted relative to the rectangular outer casing.