Open-close handheld apparatus and method of adjustment of angle between handheld portions thereof

An open-close handheld apparatus, comprising a first member and a second member,

• the first member comprises a first clamping portion and a first handheld portion;
• the second member comprises a second clamping portion and a second handheld portion,
• the first and second clamping portions are rotatably and movably connected via a first axle pin,
• the first and second clamping portions open and close relative to each other, wherein
• the first handheld portion is rotatably connected to the first clamping portion,
• a locking arrangement is provided at a joint between the first handheld portion and the first clamping portion, used for locking or unlocking the first handheld portion and the first clamping portion
• wherein the second handheld portion is rotatably connected to the second clamping portion, a locking arrangement is provided at the joint between the second handheld portion and the second clamping portion, used for locking or unlocking the second handheld portion and the second clamping portion;
• wherein the locking arrangement comprises:
• an extending portion, provided at the bottom end of the first and second clamping portion,
• a protruding portion, provided at the top end of the first and second handheld portion and inserted into the extending portion,
• a second axle pin, passing through the extending portion and the protruding portion;
• wherein the protruding portion is movably connected to the extending portion via the second axle pin;
• wherein the extending portion comprises:
• a first mounting plate,
• a second mounting plate oppositely arranged relative to the first mounting plate,
• an assembly groove provided between the first mounting plate and the second mounting plate, used for inserting into the protruding portion;
• wherein the first mounting plate comprises a first mounting hole,
• the second mounting plate comprises a second mounting hole oppositely arranged relative to the first mounting hole,
• the protruding portion comprises a third mounting hole,
• when the protruding portion is inserted into the assembly groove, the second axle pin successively passes through the first mounting hole, the third mounting hole and the second mounting hole;
• wherein the locking arrangement further comprises:
• a first semi-circular gear formed at an end of the first mounting plate,
• a second semi-circular gear formed at an end of the second mounting plate,
• a first stop block protruding from an upper surface of the first handheld portion and being adjacent to the protruding portion of the first handheld, a second stop block protruding from an upper surface of the second handheld portion and being adjacent to the protruding portion of the second handheld, the stop block provided with a U-shaped groove opening facing the semi-circular gear of the corresponding clamping portion, the bottom part of the U-shaped groove provided with a first spring mounting groove,
• a sliding snap button arranged in the U-shaped groove, the sliding snap used for matching with one of the first semi-circular gear and the second semi-circular gear, the sliding snap button comprises:
• a snap button body, the shape thereof corresponding to the shape of the bottom part of the U-shaped groove, being perpendicular to the protruding portion,
• a snap button dial knob, provided above the snap button body, protruding from the upper surface of the first handheld portion and the upper surface of the second handheld portion,
• a rack protruding from a side wall of the snap button body facing a side of the semi-circular gear, the rack used for matching with one of the first semi-circular gear and the second semi-circular gear, the rack being perpendicular to the protruding portion, the length of the rack corresponding to that of the snap button body,
• a second spring mounting shaft provided on a side wall of the snap button body facing a side of the spring mounting groove, the second spring mounting shaft being parallel to the protruding portion, the second spring mounting shaft and the spring mounting groove lying in the same straight line,
• a second spring sheathed on the second spring mounting shaft, one end of the second spring being tangent to the snap button body, the other end thereof being located in the spring mounting groove.