Patent ID: 7895925

Claim:
A clamping device used for firmly anchoring a microphone to different types of instruments, comprising: an elongated seat unit which has a mated jaw segment and a grip segment opposite to each other in a longitudinal direction, and a mount segment interposed between said mated jaw segment and said grip segment, said mated jaw segment having a mated clamping surface which extends in a first direction transverse to the longitudinal direction, and which is adapted to engage a to-be-clamped part of the instrument; a clamping lever unit including a mating jaw segment having a mating clamping surface which confronts said mated clamping surface in a second direction transverse to both the longitudinal direction and the first transverse direction, an actuating segment which is opposite to said mating jaw segment in the longitudinal direction, and which has an abutment wall confronting said grip segment in the second transverse direction, and a fulcrum segment which is interposed between said mating jaw segment and said actuating segment, and which is pivotally mounted on said mount segment about a pivot axis in the first transverse direction such that, when said actuating segment is turned away from said grip segment, said mating clamping surface is moved towards said mated clamping surface; a biasing member disposed to bias said mating jaw segment to move said mating clamping surface towards said mated clamping surface to thereby hold the to-be-clamped part therebetween; a beam which is secured to said elongated seat unit, and which is disposed to be spaced apart from said grip segment, said beam extending along a lengthwise axis in the longitudinal direction, and having a retaining segment proximate to said mount segment; and a tubular member mounted to be displaceable incrementally relative to said retaining segment along the lengthwise axis so as to move to a selected one of displaced positions, and having an inner peripheral retained surface engaged with said retaining segment by virtue of a retaining force which guards said tubular member against movement out of the selected one of the displaced positions, and an outer rim surface which is opposite to said inner peripheral retained surface in radial directions, which is configured such that, when said tubular member is displaced towards the pivot axis, said outer rim surface is brought to force said abutment wall of said actuating segment to turn about the pivot axis further so as to permit said mating clamping surface to clamp the to-be-clamped part in a tightened position with an increased friction force, and to firmly hold the to-be-clamped part in the tightened position by virtue of counteraction between the increased friction force and the retaining force.