A structure of a wheel-type positioning device includes a gun body, a wheel and a grip portion. A bullet is placed into a receiving slot of the wheel through a lead trajectory on the gun body. The receiving slots of the wheel can sequentially correspond to a barrel to complete loading actions through frontward and rearward reciprocating displacement actions of the grip portion, and through a linking rod of the grip portion driving a limiter thereon to rotate the wheel.

A firearm is provided comprising a frame which defines a forward aperture. A cylinder is mounted rotatably to the frame to rotate on a cylinder axis. The cylinder defines a plurality of passages each at a common radius from the axis, each passage includes a chamber and a rifled bore. At least one of the passages is being chambered for a different caliber than at least one other of the passages.

Because of a clearance between a barrel supporting member and a barrel, a rotational movement of the barrel is not always constant. Thus, trajectory of a bullet is misaligned. A counterweight 40 is located upper than a barrel 10, and rings 61, 62, which are support portions, are located nearer to the counterweight 40 than a gravity center of the barrel 10. Since the barrel 10 is located lower than the counterweight 40 and engaged with a lower surface side of a gear 30, when a bullet is shot and the barrel 10 is moved backward, a force to rotate the barrel 10 itself clockwise is imparted by a circular surface shape of the gear 30. The barrel 10 receives a force to be rotated clockwise from the gravity center position, the ring 61 and the ring 62, and the barrel 10 is in contact with the inner surface of the barrel supporting member 50. Thus, in spite of the existence of the clearance, the barrel 10 is not displaced in the barrel supporting member 50.

A cylinder impeller for revolvers, which transmits the trigger pulling movement to a cylinder revolving movement. The impeller includes a cover having inside it a track; a one-piece body having a plate and a slider, said slider being able to slide within and relative to the cover; and a spring arranged between the body slider and the surface of the cover track. Therefore, the cover and the body slide one relative to the other and against the spring action, thus varying the overall length of the impeller and compensating and absorbing possible teeth machining variations of the cylinder extractor.

A cylinder impeller for revolvers, which transmits the trigger pulling movement to a cylinder revolving movement. The impeller includes a cover having inside it a track; a one-piece body having a plate and a slider, said slider being able to slide within and relative to the cover; and a spring arranged between the body slider and the surface of the cover track. Therefore, the cover and the body slide one relative to the other and against the spring action, thus varying the overall length of the impeller and compensating and absorbing possible teeth machining variations of the cylinder extractor.

A cartridge loading mechanism of a toy revolver includes a magazine, a cylinder, a cartridge drum and a driving element. When loading bullets, the cartridge loading mechanism may be removed to load the bullets. When firing a bullet, the cylinder may be rotated to provide a high simulation. When a bullet is fired, the cylinder and the cartridge drum are rotated together, and the magazine disposed in the cylinder and an inner magazine tube remain still and will not rotate with the cylinder, so that the inner magazine tube is aligned precisely with the barrel to improve the shooting accuracy.

A cartridge loading mechanism of a toy revolver includes a magazine, a cylinder, a cartridge drum and a driving element. When loading bullets, the cartridge loading mechanism may be removed to load the bullets. When firing a bullet, the cylinder may be rotated to provide a high simulation. When a bullet is fired, the cylinder and the cartridge drum are rotated together, and the magazine disposed in the cylinder and an inner magazine tube remain still and will not rotate with the cylinder, so that the inner magazine tube is aligned precisely with the barrel to improve the shooting accuracy.

Because of a clearance between a barrel supporting member and a barrel, a rotational movement of the barrel is not always constant. Thus, trajectory of a bullet is misaligned. A counterweight 40 is located upper than a barrel 10, and rings 61, 62, which are support portions, are located nearer to the counterweight 40 than a gravity center of the barrel 10. Since the barrel 10 is located lower than the counterweight 40 and engaged with a lower surface side of a gear 30, when a bullet is shot and the barrel 10 is moved backward, a force to rotate the barrel 10 itself clockwise is imparted by a circular surface shape of the gear 30. The barrel 10 receives a force to be rotated clockwise from the gravity center position, the ring 61 and the ring 62, and the barrel 10 is in contact with the inner surface of the barrel supporting member 50. Thus, in spite of the existence of the clearance, the barrel 10 is not displaced in the barrel supporting member 50.

A cartridge loading mechanism of a toy revolver includes a magazine, a cylinder, a cartridge drum and a driving element. When loading bullets, the cartridge loading mechanism may be removed to load the bullets. When firing a bullet, the cylinder may be rotated to provide a high simulation. When a bullet is fired, the cylinder and the cartridge drum are rotated altogether, and the magazine disposed in the cylinder and an inner magazine tube remain still and will not rotate with the cylinder, and the inner magazine tube is aligned precisely with the barrel to improve the shooting accuracy.

A cartridge loading mechanism of a toy revolver includes a magazine, a cylinder, a cartridge drum and a driving element. When loading bullets, the cartridge loading mechanism may be removed to load the bullets. When firing a bullet, the cylinder may be rotated to provide a high simulation. When a bullet is fired, the cylinder and the cartridge drum are rotated altogether, and the magazine disposed in the cylinder and an inner magazine tube remain still and will not rotate with the cylinder, and the inner magazine tube is aligned precisely with the barrel to improve the shooting accuracy.