Abstract:
A spout control valve for water drinking machines aims to be assembled and installed easily and provide smooth water supply. The control valve is located in a spout of a water drinking machine. The control valve has an integrated valve seat made of non-lead material. An action seat and a drawing seat are provided to move together. The drawing seat has a stopper plug to butt an outlet of a first water passage of the valve seat to control opening and closing of water supply.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a spout control valve for water drinking machines and particularly to a spout control valve of a water drinking machine that can be assembled and installed easily and provide smooth water supply. 
         [0003]    2. Description of the Prior Art 
         [0004]    The conventional spout control valve of a water drinking machine (referring to  FIG. 1 ) mainly has a control valve  2  located in a spout  1  of the water drinking machine. The spout  1  also has, in this order, an inner holding seat  11 , a pushbutton  12  and an outer holding seat  13  to retain the control valve  2 . Through opening and closing of the control valve  2  the spout  1  can supply water. Such a structure still has drawbacks in practice, notably: 
         [0005]    1. The elements forming the conventional control valve  2  mostly are made of lead. As lead is harmful to human health, it is forbidden in advanced countries. 
         [0006]    2. The conventional control valve  2  has a valve cap  21  and a valve body  22  formed by metal stamping. Such a process usually forms acute edges at their junctures and result in scraping and damaging of the edge  231  of the stopper plug  23  that would cause water leakage. 
         [0007]    3. The valve body  22  of conventional control valve  2  has a water passage  24  formed by connecting multiple ducts  241  and  242 . Connecting defects easily happen. The cost also is higher. Product competitiveness suffers. 
       SUMMARY OF THE INVENTION 
       [0008]    Therefore the present invention aims to provide a spout control valve for water drinking machines that can be assembled and installed easily and provide smooth water supply. According to the invention a control valve is provided in a spout of a water drinking machine. The control valve has a valve seat formed integrally from a non-lead material. The invention further provides an action seat to hook a drawing seat that move together. The drawing seat has a stopper plug butting an outlet of a first water passage of the valve seat to control opening and closing of water supply. Such a structure can facilitate assembly and installation, and also maintain smooth water supply. 
         [0009]    The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is a sectional view of a conventional spout control valve of a water drinking machine. 
           [0011]      FIG. 2  is an exploded view of an embodiment of the invention. 
           [0012]      FIG. 3  is an exploded view of the control valve of the invention. 
           [0013]      FIG. 4  is a sectional view of the valve seat of the invention 
           [0014]      FIG. 5  is a schematic view of the action seat and drawing seat of the invention in a coupled condition. 
           [0015]      FIG. 6  is a sectional view of the invention in operating condition- 1 . 
           [0016]      FIG. 7  is a sectional view of the invention in operating condition- 2 . 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0017]    Please referring to  FIGS. 2 through 7 , the spout control valve of water drinking machines according to the invention mainly has a water control chamber  31  in a spout  3  of a water drinking machine to house a control valve A, and also house in this order, an inner holding seat  32 , a pushbutton  33  and an outer holding seat  34  to retain the control valve A. The control valve A includes an upper valve assembly  4  and a lower valve assembly  5 . 
         [0018]    The water control chamber  31  has the bottom communicating with a water intake passage  36  and a water discharge passage  35 . The water discharge passage  35  is connected to a water channeling seat  37  to discharge water through a water discharge duct  371 . 
         [0019]    The upper valve assembly  4  is a standard element consisting of a first adjustment element  41 , a first elastic element  42 , a second adjustment element  43 , a sleeve  44  and a second elastic element  46 . 
         [0020]    The first adjustment element  41  has a first screw thread  411  on the periphery and an adjustment slot  412  at the top and a retaining strut  413  extended from the center of the bottom thereof. 
         [0021]    The first elastic element  42  has one end pressed and retained by the first adjustment element  41 . 
         [0022]    The second adjustment element  43  has an anchor strut  431  at the top with a retaining notch  432  formed thereon to hold another end of the first elastic element  42 , and an internal screw hole  433  formed at the bottom thereof (referring to  FIG. 6 ). 
         [0023]    The sleeve  44  has a housing room  441  which has a second screw thread  4411  formed on the periphery and also holds the first and second adjustment elements  41  and  42 , and the first elastic element  42 . The first and second screw threads  411  and  4411  are fastenable to engage the first adjustment element  41  and the sleeve  44 . The sleeve  44  has an aperture  442  at the bottom, and forms a multi-step periphery that includes a first retaining step  444  and a second retaining step  445 . 
         [0024]    The second elastic element  46  is coupled on the periphery of the sleeve  44  with one end pushing the first retaining step  444  of the sleeve  44 . 
         [0025]    The lower valve assembly  5  includes a valve cap  51 , a third adjustment element  514 , an upper pad  515 , an action seat  52 , a valve seat  54 , a drawing seat  55  and a lower pad  56 . 
         [0026]    The valve cap  51  has a jutting ring  512  at the top with an opening  511  formed thereon, and at least one retaining notch  513  formed on the periphery. 
         [0027]    The third adjustment element  514  has a screw hole  5141  in the center. 
         [0028]    The upper pad  515  has a hole  5151  and a retaining flange  5152  extended downwards from the circumference. 
         [0029]    The lower pad  56  has at least one coupling hole  561 . 
         [0030]    The invention provides more features as follow: 
         [0031]    The action seat  52  has an upper coupling section  521  at the upper side that has a thread section  5211  formed thereon. The upper coupling section  521  runs through the hole  5151  of the upper pad  515  and fastens to the third adjustment element  514  and second adjustment element  43  by screwing through the tread section  5211  with the screw hole  5141  and the internal screw hole  433 . The action seat  52  further has a lower coupling section  522  extended from the bottom thereof and formed substantially in a          -shape with two sides each has an inner wall formed a retaining rib  523  and a first hook  524 . 
         [0032]    The valve seat  54  (also referring to  FIGS. 3 and 4 ) is formed in an integrated manner, and has a housing space  541  inside and a retaining deck  542  formed on the periphery of the housing space  541  to hold the upper pad  515  and the valve cap  51 . The retaining deck  542  has a retaining trough  546  to retain the upper pad  515  and allow it to fully cover the upper portion of the housing space  541 .The valve seat  54  has a first water passage  543  and a second water passage  544 . The first water passage  543  communicates with the water intake passage  36 . The second water passage  544  communicates with the water discharge passage  35 . The valve seat  54  further has at least one retaining plate  545  on the periphery corresponding to the retaining notch  513  of the valve cap  51 . 
         [0033]    The drawing seat  55  has a holding trough  551  to hold a stopper plug  550 , and a coupling portion  552  extended upwards from each of two sides thereof. The coupling portion  552  has a distal end formed a second hook  553  latchable with the first hook  524  of the action seat  52  (referring to  FIG. 5 ). The second hook  553  has a notch  554  corresponding to the retaining rib  523  of the first hook  524  for wedging so that the drawing seat  55  and the action seat  52  are moved together to allow the stopper plug  550  to butt the outlet of the first water passage  543  to control opening and closing of water supply. 
         [0034]    By means of the construction set forth above, when in use to supply drinking water through the spout  3 , push the pushbutton  33  (referring to  FIGS. 4 and 6 ), the control valve A is compressed to move the sleeve  44 , the first and second elastic elements  42  and  46 , action seat  52  and drawing seat  55  downwards; the drawing seat  55  is lowered without butting the outlet of the first water passage  543 , thus the drinking water can flow through the first water passage  543  and the housing space  541  of the valve seat  54  into the water discharge passage  35  of the second water passage  544 , and be ejected through the water discharge duct  371 . Water can be supplied smoothly for user drinking. To stop water supply, release the pushbutton  33 , the second elastic element  46  which has a greater elastic force than the first elastic element  42  pushes the pushbutton  33 , sleeve  44 , action seat  52  and drawing seat  55  upwards so that the stopper plug  550  butts the outlet of the first water passage  543  again to stop water supply (referring to  FIGS. 4 and 7 ).