Patent ID: 9452517
Filing Date: 2016-09-27
CPC Classification: B25B

Claim Text:
1. A collapsible torque wrench comprising: a shank; a drive head being disposed at a front end of the shank; a first pivoted end and a second pivoted end being disposed at a rear end of the shank and spaced from each other by a certain distance; a connection rod, a front end of the connection rod being pivotally connected with the first pivoted end of the shank, whereby the connection rod is angularly displaceable relative to the shank; a housing having a tubular body and a casing fixedly disposed on one side of the tubular body, the connection rod being relatively slidably fitted in the tubular body, a rear end of the connection rod extending into the tubular body; at least two pinholes being formed on a circumference of the tubular body; the casing having an internal receiving space; a torque adjustment mechanism including a fixing block, at least one elastic member and an adjustment member; the fixing block being a hollow sleeve; at least two insertion holes being radially formed on a circumference of the fixing block; the fixing block being mounted in the tubular body; at least two pin members being respectively inserted in the pinholes of the tubular body and the insertion holes of the fixing block to fix the fixing block with the tubular body; the rear end of the connection rod extending through the fixing block; a front end of the adjustment member being screwed with the rear end of the connection rod; the elastic member being mounted in the tubular body, two ends of the elastic member respectively abutting against the fixing block and the adjustment member; and a stop member, a body of the stop member being formed with a locating slot, the stop member being received in the casing, a front end of the stop member being pivotally connected with the second pivoted end of the shank, whereby the stop member is angularly displaceable within the casing; a restriction member being disposed in the casing to extend into the locating slot of the stop member; wherein the two pinholes pass through the tubular body and the two insertion holes pass through the fixing block, two ends of the two pinholes being respectively aligned with two ends of the two insertion holes; at least four pin members being respectively inserted in one end of each pinhole and one end of each insertion hole aligned with the pinhole, the at least four pin members being position in two pairs of pin members and forming two radial axes, the at least four pins and an interior surface of the fixing block are spaced apart from the connection rod.