Toy Water Gun

Abstract

To provide a toy water gun with a simple configuration and an easy handling, a toy water gun 1 includes a housing 10 having a grip part 11 , a removable tank 3 , a muzzle part 4 , a cylinder 20 , a pump mechanism 2 having a piston 21 and a check valve 6 , a water passage connecting the tank 3 and the muzzle part 4 , an operation part 12 , and a water stopper, wherein the piston 21 includes a piston head 21 a at its end, a discoid ring mounting plate 23 is secured to the piston head 21 a , a ring groove 24 is formed between the piston head part 21 a and the rear of the ring mounting plate 23 , the ring mounting plate 23 has through-holes 25 which communicates with the ring groove 24 , and an O-ring 22 is slidably provided in the ring groove 24.

1 . A toy water gun comprising:
 a housing having a grip part;   a detachable tank disposed above the vicinity of a rear end of the housing;   a muzzle part that is disposed on a front end of the housing;   a pump mechanism having:
 a circular cylinder which is secured in the housing; 
 a piston which is disposed so as to move in a front-rear direction in the housing; and 
 a check valve which is disposed closably an opening which allows the cylinder and the tank communicated with each other; 
   a water passage which connects the tank and the muzzle part;   an operation part that is disposed at a front lower part of the housing so as to move in the front-rear direction relative to the housing; and   a water stop mechanism that is provided halfway the water passage,   wherein the piston is configured such that:
 the piston comprises a piston head part at an end thereof; 
 the piston head part includes a ring mounting plate having a circular disc shape which is secured thereto; 
 the ring mounting plate is formed in such a manner that a diameter of a front part is smaller than that of a rear part so as to form a ring groove between the piston head part and the rear part of the ring mounting plate when the ring mounting plate is secured to the piston head part and has a plurality of through-holes which communicates with the ring groove; 
 the ring groove has a O-ring slidably disposed therein; 
 the O-ring seals a gap between the cylinder and the piston when the O-ring is closely attached to the piston head part, and the gap between the cylinder and the piston are allowed communicated with the through-holes to thereby allow air to flow through the gap therebetween when the O-ring is closely attached to a rear part of the ring mounting plate; and 
   wherein while the water stop mechanism holds the water passage in a stop-water state, the piston connected to the operation part is inserted into the cylinder to thereby supply air residing in the cylinder to the tank via the check valve by moving the operation part rearward, the piston is withdrawn from the cylinder to thereby draw air into the cylinder by moving the operation part forward, so that a pressure in the tank is increased by repeating the back-and-forth movement of the operation part, and the stop-water state of the water passage is released to thereby squirt water in the tank forward through the water passage and the muzzle part by means of the pressure in the tank by actuating the water stop mechanism.   
     
     
         2 . The toy water gun as set forth in  claim 1 , wherein the water passage is a flexible tube,
 wherein the water stop mechanism is made up of a trigger part which is rotatably connected to the vicinity of the grip part and an elastic member which biases the trigger part, water in the flexible tube can be stopped by compressing the flexible tube by a compression part formed at the trigger part biasing the trigger part by the elastic, and   wherein water in the tank is squirted forward through the flexible tube and the muzzle part by means of pressure in the tank by rotating the trigger part to thereby release the stop-water state of the flexible tube.