Pattern switching device for garden nozzles
A garden nozzle includes a barrel and a handle to be connected with a hose and a tube is movably received in the barrel and connected with a pattern switching button which is connected to the handle. A shank with a spiral groove extends through a pattern member rotatably mounted to a front end of the barrel and a sleeve which is received in the tube. The pattern member is fixed to the shank. The sleeve includes a ridge which is movably engaged with the spiral groove so that when pulling the pattern switching button, the tube and the sleeve are moved backward so as to drive the shank and the pattern member to rotate.
1. A garden nozzle comprising:
a barrel with a pipe located therein and a handle connected to the barrel and a path defined through the handle, the pipe connected with the path, a trigger pivotably connected to the handle and having a valve engaged with the path, a pattern switching button movably connected to the handle;
a pattern member rotatably mounted to a front end of the barrel and a shaft has a first end fixed to the pattern member and a spiral groove defined in an outer periphery of a shank of the shaft, the shank located in the barrel;
a tube movably mounted to the shank and a spring biased between one end of the tube and an inside of the barrel, two holes defined through a wall of the tube and a first pawl and a second pawl respectively and pivotably engaged with the two holes, the pattern switching button connected to the tube;
a sleeve mounted to the shank and located in the tube, a ridge extending from an inner periphery of the sleeve and movably engaged with the groove in the shank, two recesses defined in an outer periphery of the sleeve, and the first and second pawls engaged with the recesses respectively, the second pawl having a side wing extending outward therefrom which is pushed by a protrusion in the barrel to pivot the second pawl away from the recess.
2. The garden nozzle as claimed in claim 1 further comprising a disk located beside the pattern member and having a tubular portion in which the tube in the barrel is received, an annular recess defined the one side thereof, a gear co-axially secured to the shank and rotatably received in the annular recess, a stop member connected to the disk and engaged with one of the teeth of the gear, the stop member and the teeth of the gear being shaped that the gear together with the shank are rotated in one direction.
3. The garden nozzle as claimed in claim 2 , wherein the gear includes six teeth.
4. The garden nozzle as claimed in claim 1 , wherein the tube includes insertions extending from the other end thereof, a frame mounted to the shank and including two engaging notches with which the insertions are engaged, a first positioning spring biased between the first pawl and an extension plate of the frame, a second positioning spring biased between the side wing of the second pawl and the frame.
5. The garden nozzle as claimed in claim 1 , wherein the tube includes a longitudinal extension and the barrel includes a guiding portion therein, the longitudinal extension movably inserted in the guiding portion.
6. The garden nozzle as claimed in claim 1 , wherein the pattern switching button includes two lugs which are connected to the tube.