A power operated chiropractic adjuster, comprising:
- a body, whose inside has a driving set and a power supply that are electrically connected with each other;
- an urging ring, whose one end is connected to the driving set for the driving set to rotate the urging ring and whose other end has an accommodating space, the accommodating space having two oppositely disposed actuating parts and an urging surface;
- a pulling ring, which is disposed in the accommodating space of the urging ring with a first spring interposed between the pulling ring and the urging surface of the accommodating space, has a connecting hole formed along its axial direction, and has two actuating blocks disposed around the rim thereof;
- wherein each of the actuating blocks has an urging slant surface so that the two actuating parts on the urging ring engage with the two urging slant surfaces of the two actuating blocks, respectively, the actuating parts on the urging ring push the urging slant surfaces of the pulling ring as the urging ring is rotated by the driving set, forcing the pulling ring to move along its axial direction toward the urging surface of the urging ring to gradually compress the first spring, and the pulling is driven by the resilient force of the first spring back to its original position when the actuating parts of the urging ring leave the urging slant surfaces of the pulling ring;
- an impact set disposed in the connecting hole of the pulling ring, which includes a control pin, a hollow plunger, and an escape tube mounted in sequence;
- wherein the plunger has a front section and a rear section and at least one constraining hole, a second spring is interposed between the rear section of the plunger and the urging surface of the urging ring, the control pin is disposed inside the plunger and has a constraining section and an escaping section, the escape tube is mounted on the front section of the plunger and connected with the pulling ring to perform a reciprocal motion with it, at least one steel ball is disposed inside the plunger to correspond to the constraining holes, the steel balls urge against the rim of the escape tube through the constraining holes of the plunger when they are in contact with the constraining section of the control pin, making the plunger and the escape tube constrain each other, the escape tube concurrently pulls the plunger to move toward the urging surface of the accommodating space and compress the second spring as the escape tube moves along with the pulling ring toward the urging surface, the steel balls urge against the rim of the escape tube without through the constraining holes when the they are in contact with the escaping section of the control pin, so that the plunger performs a firing action under the resilient force of the second spring;
- an urging pin set, whose one end is disposed opposite to the impact set and whose other end is disposed opposite to a hammer set, wherein the urging pin set is hit by the plunger to push the hammer set, producing an ejecting effect, when the plunger of the impact set performs the firing action.