Abstract:
A spray gun capable of mixing detergent includes a detergent tube having a water guiding tube passing through its upper cover, an interior tube fixedly connected to its bottom having a horizontal water inlet communicating with the detergent tube; a separate tube fixedly put between the interior tube and the adjustment tube for connection, an upper end of the separate tube connected to the water guiding tube, an inside of the separate tube partitioned by a partition wall to form an upper tube hole and a lower tube hole, an upper end of the upper tube hole having a detergent guiding inlet, a bottom of the upper tube hole having a water guiding inlet, the lower tube hole connected to a water source, an upper end of the lower tube hole having a water outlet; and an adjustment tube having an upper extension tube for putting the interior tub.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a spray gun, and more particularly to a spray gun capable of mixing detergent that fills with detergent, adjusts the inflow of mixing detergent into water or completely closing detergent guided to water. 
     BACKGROUND OF THE INVENTION 
     According to U.S. Pat. No. 6,964,380, entitled as “Spraying gun having flow rate control effect”, an end of a detergent tube  4  is connected to a connecting member  3 . A water outlet conduit  41  of the detergent tube  4  is closely put to a water passage  32  of the connecting member  3 . The connecting member  3  has a mounting portion  31  for connecting a water inlet connector  1  after passing through a through hole  25  of an adjusting member  2 . An inside of the mounting portion  31  has a water dividing bar  35  capable of communicating with the water passage  32 . A top of the mounting portion  31  has a water inlet hole  34  horizontally passing through. A periphery of the water passage  32  of the connecting member  3  has a detergent channel  37  communicating with a detergent conduit  42 . The periphery of the mounting portion  31  of the connecting member  3  has two detergent passages  36  for communicating with the detergent channel  37 . The inside of the adjusting member  2  has a catch portion  24 . The catch portion  24  has two detergent holes  26  for aligning the two detergent passages  36 . A receiving recess  27  is formed on an upper end of the catch portion  24 , and provided for containing the connecting member  3 . A corresponding side of an internal wall of the catch portion  24  has a plurality of elongated recessed water connecting portions  23  and a stop edge  22 . The inside of the water inlet connector  1  has a horizontal sealing wall so as to partition a water inlet chamber  12  for connecting a water source and a mounting recess  15  for connecting the mounting portion  31  of the connecting member  3 . An upper side of the water inlet chamber  12  of the water inlet connector  1  has a water outlet hole  13 . An external surface of the water outlet hole  13  is adjusted and driven to closely attach the stop edge  22  of the adjusting member  2  or the plurality of elongated recessed water connecting portions  23  by rotating the adjusting member  2 . 
     When the water outlet hole of the water inlet connector is at the plurality of elongated recessed water connecting portions via the rotation of the adjusting member, the water source is guided through the water inlet hole of the connecting member, and then enters into the water passage from the water dividing bar, and finally connected to the water outlet conduit of the detergent tube to directly guide water. In the meanwhile, If the two detergent passages of the connecting member corresponding to the two detergent holes of the adjusting member is synchronously adjusted, a portion of water can be guided into the inside of the detergent tube through the detergent passages and the detergent holes so as to mix with detergent. Water then is guided to flow into the water inlet hole from the original inlet and outlet. 
     However, the drawbacks of the foregoing structure are that the sequence of inflow and outflow is not planned after the two detergent passages of the connecting member correspond to the two detergent holes of the adjusting member. Consequently, after water enters into the two detergent holes of the adjusting member simultaneously, water may not be effectively guided into the detergent tube, and detergent may not be guided via the detergent holes from the detergent tube as well. The structure is an ineffective design. 
     Accordingly, to overcome the foregoing shortcomings, the inventor(s) of the present invention based on years of experience in the related field to conduct extensive researches and experiments, and finally invented a spray gun capable of mixing detergent. 
     SUMMARY OF THE INVENTION 
     A primary objective of the present invention is to provide a spray gun capable of filling detergent, and adjusting the inflow of guiding water and the detergent tube to mix with water for spraying. 
     To achieve the foregoing objective, the present invention provides a spray gun capable of mixing detergent. The spray gun includes a detergent tube, an upper end of the detergent tube fixedly connected to an upper cover, a bottom of the detergent tube fixedly connected to an interior tube having a horizontal water inlet communicating with the detergent tube; a separate tube, an upper section of the separate tube put to a tube hole of the interior tube, an upper end of the separate tube connected to a water guiding tube, the water guiding tube extended from a central circular hole of the upper cover, an inside of the separate partitioned by a partition wall to form an upper tube hole and a lower tube hole, an upper end of the upper tube hole having a detergent guiding inlet, a bottom of the upper tube hole having a water guiding inlet, the lower tube hole connected to a water source, an upper end of the lower tube hole having a water outlet; and an adjustment tube having an upper extension tube put to the interior tube, its tube hole for putting a lower section of the separate tube, a tube wall of a bottom of the tube hole having a plurality of long concave grooves and a plurality of short concave grooves, a corresponding side wall of the upper extension tube having an upper water inlet corresponding to the detergent guiding inlet of the separate tube and a lower water outlet corresponding to the horizontal water inlet of the interior tube. By assembling the foregoing components, the closing of the water source is controlled, or water is guided from the water guiding tube, or water mixed with detergent is guided from the water guiding tube through the rotating of the adjustment tube. 
     Other features and advantages of the present invention and variations thereof will become apparent from the following description, drawings, and claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a three-dimensional assembly drawing of a spray gun according to a preferred embodiment of the present invention; 
         FIG. 2  is a decomposition drawing of a spray gun according to a preferred embodiment of the present invention; 
         FIG. 3  is a cross-sectional drawing of a spray gun according to a preferred embodiment of the present invention; 
         FIG. 4  is a cross-sectional drawing of an adjustment tube of a spray gun according to a preferred embodiment of the present invention; 
         FIG. 5  is an assembly drawing of a separate tube and an adjustment tube according to a preferred embodiment of the present invention; 
         FIG. 6  is a part sectional drawing of a spray gun according to  FIG. 1 ; 
         FIG. 7  is an assembly drawing of a spray gun according to a preferred embodiment of the present invention, as a transverse section drawing of a water outlet in closing status after rotating the adjustment tube; 
         FIG. 8  is a front section drawing according to  FIG. 7 ; 
         FIG. 9  is an assembly drawing of a spray gun according to a preferred embodiment of the present invention, as a transverse section drawing of a water outlet at the long concave grooves after rotating the adjustment tube; 
         FIG. 10  is a front section drawing according to  FIG. 9 . 
         FIG. 11  is an assembly drawing of a spray gun according to a preferred embodiment of the present invention, as a transverse section drawing of a water outlet at the short concave grooves after rotating the adjustment tube; and 
         FIG. 12  is a front section drawing according to  FIG. 11 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Other features and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings. 
     Please refer to  FIG. 1  to  FIG. 12 , a spray gun capable of mixing detergent of the present invention is disclosed. The spray gun includes a detergent tube  10 , a separate tube  30  and an adjustment tube  50 . An upper end of the detergent tube  10  includes an upper cover  11  having a central circular hole  111 . A bottom of the detergent tube  10  is fixedly connected to an interior tube  20 . An external diameter of the interior tube  20  is smaller than an internal diameter of the detergent tube  10 . A side wall of the interior tube  20  has a horizontal water inlet  21 . An inside of the tube hole of the interior tube  20  has a plurality of notches  22 . 
     An upper section of the separate tube  30  can be put to the inside of the tube hole of the interior tube  20 . An upper end of the separate tube  30  is connected to a water guiding tube  40 . The water guiding tube  40  protrudes from the central circular hole  111  of the upper cover  11 . A periphery of an upper section of the separate tube  30  has a plurality of protruding tenons  31  for inserting the plurality of notches  22  as positioning status. A predetermined place of a periphery of the separate tube  30  has a limit plate  32 . In addition, an inside of the separate tube  30  has a partition wall  33  for partitioning the separate tube  30  into an upper tube hole  34  and a lower tube hole  35 . An upper end of the upper tube hole  34  has a detergent guiding inlet  341 . A bottom of the upper tube hole  34  has a water guiding inlet  342 . The lower tube hole  35  is connected to a water source. An upper end of the lower tube hole  35  has a water outlet  351 . 
     The adjustment tube  50  has an upper extension tube  51  that is put to the interior tube  20 . The tube hole  52  of the upper extension tube  51  is extended to a bottom of the adjustment tube  50  as penetration status. A partial area of an internal wall of the tube hole  52  of the adjustment tube  50  has a plurality of long concave grooves  53  and a plurality of short concave grooves  54  that are arranged and spaced at interval. A limit concave notch  511  is disposed along a top tube wall of the upper extension tube  51 . A corresponding side wall of the upper extension tube  51  has an upper water inlet  512  corresponding to the detergent guiding inlet  341  of the separate tube  30  and a lower water outlet  513  corresponding to the horizontal water inlet  21  of the interior tube  20  respectively. 
     A lower section of the separate tube  30  is put to the tube hole  52  of the adjustment tube  50  so that the bottom of the separate tube  30  and the bottom of the adjustment tube  50  can be at the same plane, and the limit plate  32  of the separate tube  30  can be put to the limit concave notch  511 , thereby limiting the rotating range performed by the adjustment tube  50 . The water outlet  351  and the water guiding inlet  342  can correspond to the long concave grooves  53  and the short concave grooves  54  or an internal wall of the sealed tube hole  52 . An external diameter of the upper extension tube  51  is slightly smaller than a tube hole of the interior tube  20 . An external periphery of the lower water outlet  513  has a water stop ring  551  capable of closely attaching to an internal wall of the tube hole of the interior tube  20 . 
     By assembling the foregoing components, the closing of the water source is controlled, or water is guided from the water guiding tube, or water mixed with detergent is guided from the water guiding tube through the rotating of the adjustment tube  50 . Firstly, after the lower tube hole  35  of the separate tube  30  is connected to the water source, the adjustment tube  50  is continuously rotated to allow the water outlet  351  and the water guiding inlet  342  of a lower end of the separate tube  30  corresponding to a sealed internal wall of the tube hole  52  of the adjustment tube  50 . Water of flowing into the spray gun of the present invention can be completely blocked (as shown in  FIG. 7  and  FIG. 8 ). When the water outlet  351  and the water guiding inlet  342  enter the long concave grooves  53  by continuously rotating the adjustment tube  50 , the detergent guiding inlet  341  of the separate tube  40  is still attached to an internal wall of the tube hole  52  of the adjustment tube  50 , and the lower water outlet  513  of the adjustment tube  50  is also attached to an internal wall of the tube hole of the interior tube  20 . Water merely flows into the long concave grooves  53  of the adjustment tube via the water outlet  351  from the lower tube hole  35  of the separate tube  30 , and circumrotates into the upper tube hole  34  from the water guiding inlet  342  of the separate tube  30 , and flows to the water guiding tube  40  (as shown in  FIG. 9  and  FIG. 10 ). Accordingly, by continuously rotating the adjustment tube  50 , when the water outlet  513  corresponds to the water guiding inlet  342  at the short concave grooves  54  to allow the detergent guiding inlet  341  of the separate tube  30  to communicate with the upper water inlet  512  of the adjustment tube  50  so that the lower water outlet  513  of the adjustment tube  50  can communicate with the horizontal water inlet  21  of the interior tube  20 . Therefore, after water enters into the short concave grooves  54  of the adjustment tube  50  via the water outlet  351  from the lower tube hole  35  of the separate tube  30 , most water flows upwardly from the lower section of the short concave grooves  54  so that a portion of water can flow into the upper tube hole  34  of the water guiding inlet  342 . Another portion of water is guided into the detergent tube  10  from the lower water outlet  513  of the adjustment tube  50  and the horizontal water inlet  21  of the interior tube  20  so that after mixing with detergent, water then is guided to the upper tube hole  34  from the upper water inlet  512  of the adjustment tube  50  and the detergent guiding inlet  341  of the separate tube  30  (as shown in  FIG. 11  and  FIG. 12 ). 
     Continuously, the feature of each component and the motion relationship of the relative position of assembling each component are further illustrated in detail. 
     First, in addition to the foregoing features, an injection inlet  12  is extended from a side of the detergent tube  10 . Detergent can be injected into the detergent tube  10  from the injection inlet  12 . An external thread section  121  is formed to an external of the injection inlet  12 , and screwed with a sealing cover  13  having an internal thread section  131 . The injection inlet  12  therefore can be sealed. The upper cover  11  and the interior tube  20  in the embodiment are closely connected to the detergent tube  10  through glue. Alternately, any conventional manner of fixedly connecting the upper cover  10 , the interior tube  20  and the detergent tube  10  can be utilized. A protruding ring  14  is formed near the upper end of the detergent tube  10 . A water stop ring  15  is put to the protruding ring  14 . When the water guiding tube  40  is put through the protruding ring  14 , the water stop ring  15  can be disposed between the protruding ring  14  and the water guiding tube  40  to prevent water from leaking. A periphery of the detergent tube  10  has a gauge  16  for clearly showing the detergent content filled in the detergent tube  10 . 
     An external protruding ring  23  is formed near the bottom edge of the interior tube  20 , and provided for closely attaching the tube hole of the detergent tube  10 . The plurality of notches  22  inside the interior tube  20  in the embodiment shows the cross arrangement. The plurality of protruding tenons  31  of the separate tube  30  also shows the cross arrangement. Accordingly, the plurality of tenons  31  can be inserted into the plurality of notches  22  to assemble and connect as a whole. 
     An upper section of the separate tube  30  can be put to the tube hole of the water guiding tube  40 . An upper end of the separate tube  30  has at least one upper concave notch  36 . An upper water stop ring  361  is put on the upper concave notch  36 . A periphery of the upper water stop ring  361  can be closely attached to the inside of the tube hole of the water guiding tube  40  to prevent detergent from being permeated into the water guiding tube  40 . Moreover, to accurately connect the water guiding tube  40  and the separate tube  30  without any release, a protruding ear  37  is disposed to an external wall of an upper end of the separate tube  30 . A notch  41  capable of corresponding to the protruding ear  37  is opened to a tube wall of a bottom of the water guiding tube  40  in order to position the protruding ear  37 . In addition, an external periphery of the detergent guiding inlet  341  and the water outlet  351  of the separate tube  30  has side ring grooves  343  and  352  respectively. Side water stop rings  38  are put in the side ring grooves  343  and  352 . A lower periphery of the detergent guiding inlet  341  and the water outlet  351  of the separate tube  30  has a middle ring cavity  391  and a lower ring cavity  393 . A middle water stop ring  392  is put to the middle ring cavity  391 . A lower water stop ring  394  is put to the lower ring cavity  393 . The middle water stop ring  392  and the lower water stop ring  394  are provided for leaning against the internal wall of the tube hole  52  of the adjustment tube  50 . Accordingly, two independent flow paths can be divided by utilizing the middle water stop ring  392  and the lower water stop ring  394  disposed to the periphery of the separate tube  30  leaning against the internal wall of the tube hole  52  of the adjustment tube  50  so that detergent filled in the detergent tube  10  is merely guided by a predetermined path as the detergent guiding inlet  341 . Detergent my not permeate into the lower flow path via the water guiding inlet  342 . An external diameter of the separate tube  30  is slightly smaller than an internal diameter of the tube hole  52  of the adjustment tube  50 . A circular water channel is formed between the external diameter of the separate tube  30  and the tube hole  52  of the adjustment tube  50 . 
     A partial area of an internal wall of the tube hole  52  of the adjustment tube  50  has a plurality of long concave grooves  53  and a plurality of short concave grooves  54 . The sun of all grooves is a quarter diameter of the tube hole  52 . In addition, a ring notch  55  is surrounded to an external periphery of the lower water outlet  513  of the adjustment tube  50 . A water stop ring  551  is disposed in the ring notch  55  to closely attach an internal wall of the tube hole of the interior tube  20 . In addition, another water stop ring  56  is disposed between the interior tube  20  and an external tube wall of a bottom of the upper extension tube  51  of the adjustment tube  50 . 
     A water connection tube  60  having an internal thread hole  61  is connected to a bottom of the separate tube  30  to externally connect the water source. An end of the water connection tube  60  can lean against a bottom of the adjustment tube  50 . 
     Although the features and advantages of the embodiments according to the preferred invention are disclosed, it is not limited to the embodiments described above, but encompasses any and all modifications and changes within the spirit and scope of the following claims.