Abstract:
The invention relates to the structure of a water inlet device of a water tank, wherein a float seat is slipped outside an external water-lifting pipe, an internal water-lifting pipe is installed inside the external water lifting pipe, a control valve is fixedly connected on the upper end of the external water-lifting pipe, a valve set is set inside the control valve, the valve set includes a membrane, a positioning plate, a silencing washer, a water feeding plate and a water supply pipe. The shock and vibration caused by inflowing water current may be buffered by using the construction of the valve set, to thereby enhance the silence effect and achieve the purpose of reducing noise.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to the structure of a water inlet device and, more particularly, to the structure of the water inlet device capable to enhance the silence effect, to thereby reduce the produced noise and ensure silence in life. 
         [0003]    2. Brief Description of the Related Art 
         [0004]    As shown in  FIG. 1  and  FIG. 2 , it is the structure of a conventional water inlet device  1  for a water tank (the structure in U.S. Pat. No. 5,836,346), where an internal water-lifting pipe  13  installed inside an external water-lifting pipe  11 , and a water supply pipe  12  is slipped inside the internal water-lifting pipe  13 . A valve seat  14  is combined on the upper end of the external water-lifting pipe  11  and the water supply pipe  12 , a cap  15  is covered outside the valve seat  14 . An infundibuliform plate  121  is set on the upper end of the water supply pipe  12 , and a membrane  16  and a controlling seat  143  are installed on it. By changing the position of a float seat  141  due to the floating power to link up with an arm  142  to suppress the air getting in and out the controlling seat  143 , to thereby control the membrane  16  for opening or closing water, to thereby achieve the action of flushing and supplying water for the water tank. Although the conventional structure may achieve the purpose of inflowing and supplying water, there are some defects in use as follows: 
         [0005]    1. Since the conventional structure lacks current buffer design, the momentum is very strong and often produces water rushing noise during inflowing to disturb quiet life. 
         [0006]    2. Due to lack of the anti-shake design of the rubber ring pad between each component of the conventional structure, for example, since the anti-shake rubber ring pads between the water supply pipe  12  and the internal water-lifting pipe  13  are not enough, shaking often occur during current flows in and out, the condition may strengthen the formation of the noise and be criticized by users. 
       SUMMARY OF THE INVENTION 
       [0007]    In view of this, the inventor finally completed the water inlet device of the water tank according to the present invention after numerous improvements. Namely, the object of the invention is to provide a water inlet device of the water tank capable to enhance the silence effect for effectively buffer the shock and vibration of inflowing current, to thereby enhance the silence effect and decrease produced noise to ensure quiet life. 
         [0008]    To achieve the object, according to the invention, a float seat is slipped outside an external water-lifting pipe and an internal water-lifting pipe is set inside the external water-lifting pipe, an external threaded section set on the lower section of the internal water-lifting pipe is used to fasten a fixed set to fix on a water inlet of the water tank, a control valve is fixedly connected on the upper end of the external water-lifting pipe, and a valve set is installed inside the control valve, wherein: 
         [0009]    the external water-lifting pipe, the upper end of which is extended outward and formed an outer cylinder, and there is a hollow chamber inside the external water-lifting pipe for setting the internal water-lifting pipe and forming a water passage; 
         [0010]    the float seat, which is a seat that may move up and down by the floating power, an aperture is set on one side inside the seat for the external water-lifting pipe slipping inside, and an adjusting arm is connected on another side of the seat; 
         [0011]    the internal water-lifting pipe, which is a hollow tube body, an inner tube is set in its center; 
         [0012]    the valve set includes: 
         [0013]    a water supply pipe, which is inserted inside the inner tube of the internal water-lifting pipe, the water supply pipe has a water inlet passage; 
         [0014]    a water feeding plate, a barrel part is set on its upper side, the barrel part has an inner room, an upper column is extended upward from the center of the inner room and a lower column is extended downward, multiple L-shaped slanting ribs are distributed on the peripheral edge of the upper column, at least a water outlet is set on the bottom of the inner room, and the lower column is used for inserting the upper end of the water supply pipe; 
         [0015]    a silencing washer, which is a soft pad body, is pasted on the top edge of the barrel part of the water feeding plate, a middle hole is set in the center of the silencing washer; 
         [0016]    a positioning plate, which is pasted above the silencing washer, a middle hole and multiple through holes are set in its center; 
         [0017]    a membrane, which is a soft pad body, is pasted above the positioning plate, there is a column hole in its central part; 
         [0018]    a valve block, which has a valve inner seat with its opening downward inside, an air hole is set on the top of the valve block, a supply tube hole and an air pipe outlet are set on the peripheral edge of the valve block, a supply water tube is connected outside the supply tube hole, an air pipe is connected outside the air pipe outlet, a positioning column is convexly set in the center of the inner side of the valve inner seat; 
         [0019]    an arm, which is linked up the adjusting arm of the float seat, one end of the arm is a acting portion, an air-blocking pad is set on the bottom side of the acting portion, the air-blocking pad is used to block the air hole for controlling air passing in and out the air hole; 
         [0020]    a cap, which is a cover covered outside the valve block. 
         [0021]    The abovementioned water inlet device of the water tank of the present invention, wherein a ring gap and an inner convex edge are set on the inner edge of the outer cylinder of the external water-lifting pipe, the ring gap is used for a first water stop ring embedded in. 
         [0022]    The abovementioned water inlet device of the water tank of the present invention, wherein a lateral ring gap is set on outside edge of the barrel part of the water feeding plate for a second water stop ring embedded in. 
         [0023]    The abovementioned water inlet device of the water tank of the present invention, wherein at least a convex edge is set on the peripheral edge of the silencing washer. 
         [0024]    The abovementioned water inlet device of the water tank of the present invention, wherein the membrane has a lengthwise convex edge on the outside of the central part, a thinner side membrane is extended from the peripheral edge of the lengthwise convex edge. 
         [0025]    The abovementioned water inlet device of the water tank of the present invention, wherein a pair of parallel lateral plate is set on the top of the valve block, a shaft hole is set on the lateral plate for a corresponding fulcrum set on two sides of the arm embedding in, and a pivot hole set on another end of the arm is pivot jointed to a shaft hole set on the adjusting arm, and a pivoted bolt is used to set for pivot jointing. 
     
    
     
       BRIEF DESCRIPTION OF THE INVENTION 
         [0026]    The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which: 
           [0027]      FIG. 1  is a cross-sectional diagram of a conventional structure; 
           [0028]      FIG. 2  is a partial cross-sectional enlarged diagram of a conventional structure; 
           [0029]      FIG. 3  is a three-dimension exploded diagram of the present invention; 
           [0030]      FIG. 4  is a three-dimension diagram of the present invention; 
           [0031]      FIG. 5  is a cross-sectional diagram of the water feeding plate of the present invention; 
           [0032]      FIG. 6  is a schematic diagram of stopping water inflow of the present invention; and 
           [0033]      FIG. 7  is a schematic diagram of starting water inflow of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0034]    The above and further objects and novel features of the invention will more fully appear from the following detailed description when the same is read in connection with the accompanying drawing. It is to be expressly understood, however, that the drawing is for purpose of illustration only and is not intended as a definition of the limits of the invention. 
         [0035]    Please refer to  FIG. 3 ,  FIG. 4  and  FIG. 6 , according to the water inlet device A of the water tank of the present invention, a float seat  3  is slipped outside an external water-lifting pipe  2 , and an internal water-lifting pipe  5  is set inside the external water-lifting pipe  2 . An external threaded section  51  set on the lower section of the internal water-lifting pipe  5  is used to fasten a fixed set  4  to fix on a water inlet of the water tank (Since this part is a conventional structure, it is not illustrated in figures). A control valve  7  is fixedly connected on the upper end of the external water-lifting pipe  2 , and a valve set  6  is installed inside the control valve  7 . 
         [0036]    The external water-lifting pipe  2 , the upper end of which is extended outward and formed an outer cylinder  21 , a ring gap  211  and an inner convex edge  212  are set on the inner edge of the outer cylinder  21 , the ring gap  211  is used for a first water stop ring  22  embedded in, and there is a hollow chamber inside the external water-lifting pipe  2  for setting the internal water-lifting pipe  5  and forming a water passage  23 . 
         [0037]    The float seat  3 , which is a seat  30  that may move up and down by the floating power, an aperture  31  is set on one side inside the seat  30  for the external water-lifting pipe  2  slipping inside, an adjusting arm  32  is connected on another side of the seat  30 , and a shaft hole  321  is set on the upper end of the adjusting arm  32  for setting a pivoted bolt  322 . 
         [0038]    The internal water-lifting pipe  5 , which is a hollow tube body, an inner tube  52  is set in its center. 
         [0039]    The valve set  6  includes: 
         [0040]    a water supply pipe  61 , which is inserted inside the inner tube  52  of the internal water-lifting pipe  5 , the water supply pipe  61  has a water inlet passage  610 , at least a water stop ring  612  is set on the location near the lower end  611  of the water supply pipe  61 , and a spacing convex edge  614  is set on the location near the upper end  613  of the water supply pipe  61 ; 
         [0041]    a water feeding plate  63 , a barrel part  630  is set on its upper side, the barrel part  630  has an inner room  631  (please refer to  FIG. 5 ), an upper column  634  is extended upward from the center of the inner room  631  and a lower column  633  is extended downward, multiple L-shaped slanting ribs  632  are distributed on the peripheral edge of the upper column  634 , at least a water outlet  635  is set on the bottom of the inner room  631 , and the lower column  633  is used for inserting the upper end  613  of the water supply pipe  61  and being spaced by the spacing convex edge  614 ; a lateral ring gap  637  is set on outside edge of the barrel part  630  for a second water stop ring  62  embedded in; 
         [0042]    a silencing washer  64 , which is a soft pad body, is pasted on the top edge of the barrel part  630  of the water feeding plate  63 , a middle hole  641  is set in the center of the silencing washer  64 , and at least a convex edge  642  is set on the outside edge of the silencing washer  64 ; 
         [0043]    a positioning plate  65 , which is pasted above the silencing washer  64 , a middle hole  651  and multiple through holes  652  are set in its center; 
         [0044]    a membrane  66 , which is a soft pad body, its central part  660  is convex upward and has a column hole  661 , and has a lengthwise convex edge  662  on the outside of the central part  660 , a thinner side membrane  663  is extended from the peripheral edge of the lengthwise convex edge  662 . 
         [0045]    The control valve  7  includes: 
         [0046]    a valve block  71 , which has a valve inner seat  710  with its opening downward inside, an air hole  711  and a pair of parallel lateral plate  713  are set on the top of the valve block  71 , a shaft hole  714  is set on the lateral plate  713 , a supply tube hole  715  and an air pipe outlet  717  are set on the peripheral edge of the valve block  71 , a supply water tube  716  is connected outside the supply tube hole  715 , an air pipe  718  is connected outside the air pipe outlet  717 , a positioning column  712  is convexly set in the center of the inner side of the valve inner seat  710  for inserting in the column hole  611  of the membrane  66 ; 
         [0047]    An arm  73 , which is linked up the adjusting arm  32  of the float seat  3 , one end of the arm  73  is a acting portion  731 , an air-blocking pad  730  is set on the bottom side of the acting portion  731 , the air-blocking pad  730  is used to block the air hole  711  for controlling air passing in and out the air hole  711 . A corresponding fulcrum  733  is set on each side of the two sides of the arm  73  near the position of the air-blocking pad  730 , which is embedded in the shaft hole  714  of the valve block  71 , and a pivot hole  732  set on another end of the arm  73  is pivot jointed to the shaft hole  321  of the adjusting arm  32 , and the pivoted bolt  322  is used to set for pivot jointing. 
         [0048]    A cap  74 , which is a cover covered outside the valve block  71 . 
         [0049]    The abovementioned fixed set  4  of the present invention, which is consisted of an lower fixing nut  41 , an inner collar  42 , an upper fixing nut  43 , a cone-shaped pad  44 , a fixed tray  45  and a sleeve joint seat  46 , is used for fixing the internal water-lifting pipe  5  on the bottom of the water tank. Since this part is a conventional structure, it is not illustrated in figures. 
         [0050]    Please refer to  FIG. 6 , which is a schematic diagram of closing water of the present invention. When the water level inside the water tank achieves the full water level, the float seat  3  pushes upward due to the floating power effect and links up the air-blocking pad  730  of the arm  73  to block the air hole  711 , which causes that air cannot pass in and out, the membrane  66 , the positioning plate  65 , the silencing washer  64  closely paste on the water feeding plate  63  to stop water inflowing, to thereby achieve the action of closing water. 
         [0051]    Please refer to  FIG. 7 , which is a schematic diagram of opening water of the present invention. When the water inside the water tank flashing into the toilet, the float seat descends quickly and links up the arm  73  to let the air-blocking pad  730  not block the air hole  711 , and air may pass in and out. Thus, water inflows from the water inlet passage  610  and the upper column  634  of the water supply pipe  61  and flushes upward to push the membrane  66 . Water current passes through the appeared gap, flushes from the through hole  652  and passes the silencing washer  64 . In the same time, because of winding and buffered flexible blocking by the silencing washer  64 , the momentum of the strong inflow may be retarded and the water noise may be reduced to achieve the first sound silencing effect. A small part of water passing through the silencing washer  64  and entering the inner room  631  may flow into the supply tube hole  715  and the supply water tube  716  for supplying, but most water may flow through the slanting ribs  632  of the inner room  631 , and the second sound effect may be achieved by the water retarding effect of the slanting ribs  632 . Then, water flows from the water outlet  635  to the water passage  23  and enters the water tank until the water level elevates to the full water level. The float seat  3  simultaneously pushes upward and links up the air-blocking pad  730  of the arm  73  to block the air hole  711 , to thereby make the membrane  66 , the positioning plate  65 , the silencing washer  64  closely pasting on the water feeding plate  63  and stopping water flowing out (as shown in  FIG. 6 ).