The spear
fishing gun with a reliable and effective retractable mechanism is provided. The spear gun consists of the gun shaft, firing device,
handle (including grip) and gripped trigger, retractable spear mechanism, and the stopper of string to prevent the spear, from ramming into the retractable
string device during retraction. As soon as the spear is shot and the diver sees that he misses, he presses on the spring trigger retracting string mechanism and the spear comes back to the gun. If the spear pierces the fish, the diver can now press the retractable
string device to either release the string or retracts it to collect the fish. The retractable string mechanism is equipped with a large spool which allows the diver to
shoot at long along with short distances. The spool does not allow the string to unwind completely and waste time to rewind. This is regulated by a controlling button. There is also a screw which adjusts spring power and regulates the speed and looseness of the string during retraction while the stopper prevents the spear from ramming into the retractable
string device during retraction. The stopper is a plastic,
metal, or
glass ball, or it may have other shape.
Diameter or section of the stopper is larger than that of the string guide of the retractable mechanism. The same screw which is used for regulating spring power also functions as the on and off button for the retractable string mechanism. The invention is suitable for both general types of the spear
fishing guns: (a) the rubber-powered, or sling-type spear gun, and (b) the pneumatic spear gun, which utilizes an air-driven
piston to drive the spear shaft down a
rifle-like
barrel.