Abstract:
A sprinkler nozzle structure comprises a grip, a barrel, a spray nozzle, a trigger device, and a flow control device. The trigger device is fastened with the grip for clogging and unclogging a water channel of the grip. The flow control device is fastened between the grip and the barrel for regulating the flow of water moving from the water channel of the grip into a water channel of the barrel.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates generally to a sprinkler nozzle structure, and more particularly to a flow control device and a trigger device of the sprinkler nozzle structure. 
   2. Description of Related Art 
   The conventional sprinkler nozzle structure generally comprises a flow control device and a trigger device, which are structurally incorporated and are therefore complicated in construction, thereby resulting in an increase in production cost of the conventional sprinkler nozzle structure. The combination of the control device and the trigger device into one structural unit makes the conventional sprinkler nozzle structure vulnerable to mechanical failure. 
   SUMMARY OF THE INVENTION 
   The primary objective of the present invention is to provide a sprinkler nozzle structure comprising a flow control device and a trigger device, which are structurally independent of each other. 
   The foregoing objective of the present invention is attained by a sprinkler nozzle structure comprising a grip, a barrel, a spray nozzle, a flow control device, and a trigger device. The grip and the barrel are provided in the interior with a water channel. The grip and the barrel are connected by the flow control device. The spray nozzle is connected with the barrel. The trigger device is disposed in a midsegment of the grip. The flow control device comprises a control tube and a control knob. The control tube is provided in the side wall of an inner end with two through holes which are opposite to each other and are in alignment with the water channel of the grip and the water channel of the barrel. The control tube is fastened at an outer end with the control knob by which the control tube is rotated such that the two through holes of the control tube are in a complete or partial alignment with the water channels, thereby resulting in flow control. The trigger device comprises a trigger, an actuation rod, and an action rod. The action rod is located in the water channel of the grip and is actuated by the actuation rod at the time when the trigger is activated, thereby resulting in separation of a stop edge of the action rod from an arresting surface of the inner wall of the water channel of the grip. 
   The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  shows a perspective view of the present invention. 
       FIG. 2  shows a side schematic plan view of the present invention. 
       FIG. 3  shows a sectional schematic view of the present invention in the “OFF” state. 
       FIG. 4  shows a sectional schematic view of the present invention in the “ON” state. 
       FIG. 5  shows a schematic view of the two through holes of the control tube in a complete alignment with the water channels of the present invention. 
       FIG. 6  shows a schematic view of the two through holes of the control tube in a partial alignment with the water channels of the present invention. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   As shown in  FIGS. 1-4 , a sprinkler nozzle structure of the present invention comprises a grip  10 , a barrel  40 , a spray nozzle  50 , a trigger  60 , and a trigger guard  30 . 
   The grip  10  is provided in the interior with a water channel  11  extending in the longitudinal direction of the grip  10 . The grip  10  is provided at a bottom end with a hose connector  12  in communication with the water channel  11 . The water channel  11  is provided in the inner wall of a midsegment thereof with an annular arresting surface  13 . 
   The present invention further comprises a trigger device which is structurally associated with the grip  10 . The trigger device comprises a trigger  60 , an action rod  80 , and an actuation rod  90 . The trigger  60  is pivoted with the grip  10  by a pivot  61 . The action rod  80  is provided at a top end with a stop edge  81 , and at a bottom end with a locating slot  82 . The action rod  80  is disposed in the water channel  11  of the grip  10  such that the action rod  80  is forced by the water pressure to move upward, thereby causing the stop edge  81  to come in contact with the arresting surface  13  of the water channel  11 , as shown in FIG.  3 . The actuation rod  90  is provided with an inner end  92  which is located in the locating slot  82  of the action rod  80 . The actuation rod  90  is further provided with an outer end  91  which comes in contact with the trigger  60 . As the trigger  60  is activated, the action rod  80  is actuated by the actuation rod  90 , thereby resulting in separation of the stop edge  81  of the action rod  80  from the arresting surface  13  of the inner wall of the water channel  11  of the grip  10 , as shown in FIG.  4 . As a result, the water can flow freely in the water channel  11  without being obstructed. It must be noted here that the grip  10  is provided with a slanted side tube  14  in communication with the water channel  11 . The actuation rod  90  is accommodated in the slanted side, tube  14 . 
   The barrel  40  is provided in the interior with a water channel  41  in communication with the spray nozzle  50  which is fastened with an outer end of the barrel  40  and is provided with a plurality of jet nozzles  51  for emitting water in the form of a spray. 
   A flow control device is located between an inner end of the barrel  40  and a top end of the grip  10 . The control device comprises a housing  20 , a control tube  70 , a spring  76 , and a control knob  73  which is fastened with an outer end  74  of the control tube  70  in conjunction with a fastening ring  75 . The housing  20  is provided with an upper through hole  21  in communication with the water channel  41  of the barrel  40 . The housing  20  is further provided with a lower through hole  22  in communication with the water channel  11  of the grip  10 . In another words, the two through holes  21  and  22  of the housing  20  are in alignment with the water channels  11  and  41 . The control tube  70  is provided with an upper through hole  71  and a lower through hole  72 . The control tube  70  is rotatably disposed in the housing  20  such that the upper through hole  71  is corresponding in location to the upper through hole  21  of the housing  20 , and that the lower through hole  72  of the control tube  70  is corresponding in location to the lower through hole  22  of the housing  20 . The spring  76  is disposed in the control tube  70  such that an outer end of the spring  76  urges the inner wall of an outer end of the control tube  70 , and that an inner end of the spring  76  urges the inner wall of an inner end of the housing  20 . As the control tube  70  is turned by the control knob  73  in such a way that the upper through hole  71  of the control tube  70  is in a complete alignment with the upper through hole  21  of the housing  20 , and that the lower through hole  72  of the control tube  70  is in a complete alignment with the lower through hole  22  of the housing  20 , as illustrated in  FIG. 5 , the water flow is greatest. When the control tube  70  is turned by the control knob  73  such that the through holes  71  and  72  are in a partial alignment with the through holes  21  and  22  of the housing  20 , as illustrated in  FIG. 6 , the water flow is reduced. 
   The embodiment of the present invention described above is to be regarded in all respects as being illustrative and nonrestrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof. The present invention is therefore to be limited only by the scope of the following claim.