Mechanical ball thrower for training dog, has wireless remote control interrupting electric power supply for magnet, and ball retainer detached with ball and accelerated by sudden rolling of spring until retainer fastens against stopper

摘要

The thrower has a ball retainer (6) coupled to springs (5), and a magnet (8) provided at a sheet jacket, where the magnet is adjustable, so that a ball throwing range and a distance to stopper are adjustable. A wireless remote control interrupts an electric power supply for the magnet and the retainer (6) is detached with the ball and accelerated by sudden rolling of the spring until the retainer fastens against the stopper.