Abstract:
A vibration-reducing structure for compressing diaphragm pump features a pump head body and a diaphragm membrane. The pump head body includes three operating holes and a first curved vibration-reducing positioning structure circumferentially disposed around the upper side of each operating hole. The diaphragm membrane includes three equivalent piston acting zones and second curved vibration-reducing position structures situated at positions corresponding to the positions of the first curved vibration-reducing positioning structures. The first positioning structures in the pump head body, which may be grooves, slots, perforations, or protrusions, mate with the corresponding second positioning structures in the diaphragm membrane to reduce the moment arm generated during pumping by movement of the diaphragm membrane, which may be protrusions, grooves, slots, or perforations, thereby generating less torque to decrease the strength of vibrations and vibration noise.

Description:
[0001]    This application claims the benefit of provisional U.S. patent application Ser. No. 61/928,146, filed Jan. 16, 2014, and incorporated herein by reference. 
     
    
     FIELD OF THE PRESENT INVENTION 
       [0002]    The present invention relates to a vibration-reducing structure for compressing a diaphragm pump used in an RO (reverse osmosis) purification system, and particularly to a structure that can reduce the vibration strength of the pump so that the annoying noise incurred by consonant vibration with the housing of the RO purification system is eliminated when the structure is installed on the housing of the RO purification system. 
       BACKGROUND OF THE INVENTION 
       [0003]    Conventional compressing diaphragm pumps, which have been exclusively used with the RO (Reverse Osmosis) purifier or RO water purification system, are disclosed in U.S. Pat. Nos. 4,396,357, 4,610,605, 5,476,367, 5,571,000, 5,615,597, 5,626,464, 5,649,812, 5,706,715, 5,791,882, 5,816,133, 6,048,183, 6,089,838, 6,299,414, 6,604,909, 6,840,745 and 6,892,624. The conventional compressing diaphragm pump, as shown in  FIGS. 1 through 9 , essentially comprises a brushed or brushless motor  10  with an output shaft  11 , a motor upper chassis  30 , a wobble plate  40  with an integral protruding cam-lobed shaft, an eccentric roundel mount  50 , a pump head body  60 , a diaphragm membrane  70 , three pumping pistons  80 , a piston valvular assembly  90  and a pump head cover  20 . 
         [0004]    The motor upper chassis  30  includes a bearing  31  through which an output shaft  11  of the motor  10  extends. The motor upper chassis  30  also includes an upper annular rib ring  32  with several fastening bores  33  evenly and circumferentially disposed in a rim of the upper annular rib ring  32 . 
         [0005]    The wobble plate  40  includes a shaft coupling hole  41  through which the corresponding motor output shaft  11  of the motor  10  extends. 
         [0006]    The eccentric roundel mount  50  includes a central bearing  51  at the bottom thereof for receiving the corresponding integral protruding cm-lobed shaft of the wobble plate  40 , three eccentric roundels  52  disposed evenly and circumferentially thereon. Each eccentric roundel  52  has a screw-threaded bore  54  and an annular positioning groove  55  formed on a horizontally flush top face  53  thereof. 
         [0007]    The pump head body  60 , covers the upper annular rib ring  32  of the motor upper chassis  30  to encompass the wobble plate  40  with integral protruding cam-lobed shaft and eccentric roundel mount  50  therein, and includes three operating holes  61  evenly and circumferentially disposed therein. Each operating hole  61  has an inner diameter that is slightly bigger than the outer diameter of the eccentric roundel  52  in the eccentric roundel mount  50  for receiving each corresponding eccentric roundel  52  respectively, a lower annular flange  62  formed thereunder for mating with corresponding upper annular rib ring  32  of the motor upper chassis  30 , and several fastening bores  63  evenly disposed around a circumference of the pump head body  60 . 
         [0008]    The diaphragm membrane  70 , which is extrusion-molded from a semi-rigid elastic material and placed on the pump head body  60 , includes a pair of parallel outer raised rim  71  and inner raised rim  72  as well as three evenly spaced radial raised partition ribs  73  such that each end of respective radial raised partition ribs  73  connect with the sealing raised rim  71 . The diaphragm membrane  70  also includes three equivalent piston acting zones  74  formed and partitioned by the radial raised partition ribs  73 , wherein each piston acting zone  74  has an acting zone hole  75  created therein in correspondence with respective screw-threaded bores  54  of the eccentric roundel mount  50 , and an annular positioning protrusion  76  for each acting zone hole  75  is formed at the bottom side of the diaphragm membrane  70  (as shown in  FIGS. 7 and 8 ); 
         [0009]    The pumping pistons  80  are respectively disposed in each of the corresponding piston acting zones  74  of the diaphragm membrane  70 . Each pumping piston  80  has a tiered hole  81  extending therethrough. After the annular positioning protrusions  76  in the diaphragm membrane  70  are inserted into corresponding annular positioning grooves  55  in the eccentric roundel  52  of the eccentric roundel mount  50 , respective fastening screws  1  are inserted through the tiered hole  81  of each pumping piston  80  and the acting zone hole  74  of each corresponding piston acting zone  74  in the diaphragm membrane  70 , so that the diaphragm membrane  70  and three pumping pistons  80  can be securely screwed into screw-threaded bores  54  of the corresponding three eccentric roundels  52  in the eccentric roundel mount  50  (as can be seen in the enlarged view shown in  FIG. 9 ). 
         [0010]    Said piston valvular assembly  90 , which suitably covers on the diaphragm membrane  70 , includes a downwardly extending raised rim  91  for insertion between the outer raised rim  71  and inner raised rim  72  in the diaphragm membrane  70 , a central round outlet mount  92  having a central positioning bore  93  with three equivalent sectors, each of which contains multiple evenly circumferentially-located outlet ports  95 , a T-shaped plastic anti-backflow valve  94  with a central positioning shank, and three circumferentially-adjacent inlet mounts  96 , each of which includes multiple evenly circumferentially-located inlet ports  97  and an inverted central piston disk  98  respectively so that each piston disk  98  serves as a valve for each corresponding group of multiple inlet ports  97 , wherein the central positioning shank of the plastic anti-backflow valve  94  mates with the central positioning bore  93  of the central outlet mount  92  such that multiple outlet ports  95  in the central round outlet mount  92  are in communication with the three inlet mounts  96 , and a hermetically-sealed preliminary water-pressurizing chamber  26  is formed in each inlet mount  96  and corresponding piston acting zone  74  in the diaphragm membrane  70  upon insertion of the downwardly-extending raised rim  91  between the outer raised rim  71  and inner raised rim  72  in the diaphragm membrane  70  such that one end of each preliminary water-pressuring chamber  26  is in communication with each of the corresponding inlet ports  97  (as enlarged view shown in  FIG. 9  of association); and 
         [0011]    The pump head cover  20 , which covers pump head body  60  to encompass the piston valvular assembly  90 , pumping piston  80  and diaphragm membrane  70  therein, includes a water inlet orifice  21 , a water outlet orifice  22 , and several fastening bores  23 . A tiered rim  24  and an annular rib ring  25  are disposed in the bottom inside of the pump head cover  20  such that the outer rim for the assembly of diaphragm membrane  70  and piston valvular assembly  90  can be hermetically attached to the tiered rim  24  (as shown in the enlarged view of  FIG. 9 ). A high-pressure water chamber  27  is configured between the cavity formed by the inside wall of the annular rib ring  25  and the central outlet mount  92  of the piston valvular assembly  90  by means of pressing the bottom of the annular rib ring  25  on the rim of the central outlet mount  92  (as shown in  FIG. 9 ). 
         [0012]    By running each fastening bolt  2  through each corresponding fastening bores  23  of pump head cover  20  and each corresponding fastening bore  63  in the pump head body  60 , and then putting a nut  3  onto each fastening bolt  2  to securely screw the pump head cover  20  and pump head body  60  to the motor upper chassis  30  via each corresponding fastening bore  33  in the motor upper chassis  30 , the whole assembly of the conventional compressing diaphragm pump is finished (as shown in  FIGS. 1 and 9 ). 
         [0013]      FIGS. 10 and 11  are illustrative figures showing the practical operation mode of the conventional compressing diaphragm pump of  FIGS. 1-9 . 
         [0014]    Firstly, when the motor  10  is powered on, the wobble plate  40  is driven to rotate by the motor output shaft  11  so that three eccentric roundels  52  on the eccentric roundel mount  50  sequentially and constantly move in an up-and-down reciprocal stroke. 
         [0015]    Secondly, the three pumping pistons  80  and three piston acting zones  74  in the diaphragm membrane  70  are in the meantime sequentially driven by the up-and-down reciprocal stroke of the three eccentric roundels  52  to move in an up-and-down displacement. 
         [0016]    Thirdly, when the eccentric roundel  52  moves in a down stroke causing pumping piston  80  and piston acting zone  74  to be displaced downwardly, the piston disk  98  in the piston valvular assembly  90  is pushed into an open status so that tap water W can flow into the preliminary-pressurizing chamber  26  via water inlet orifice  21  in the pump head cover  20  and inlet ports  97  in the piston valvular assembly  90  (as indicated by the arrowhead extending from W in the enlarged view of  FIG. 10 ). 
         [0017]    Fourthly, when the eccentric roundel  52  moves in an up stroke causing pumping piston  80  and piston acting zone  74  to be displaced downwardly, the piston disk  96  in the piston valvular assembly  90  is pulled into a closed status to compress the tap water W in the preliminary-pressurizing chamber  26  and increase the water pressure therein up to a range of 80 psi-100 psi. The resulting pressurized water Wp causes the plastic anti-backflow valve  94  in the piston valvular assembly  90  to be pushed to an open status. 
         [0018]    Fifthly, when the plastic anti-backflow valve  94  in the piston valvular assembly  90  is pushed to an open status, the pressurized water Wp in the preliminary water-pressurizing chamber  26  is directed into high-pressure water chamber  27  via the group of outlet ports  95  for the corresponding sector in the central outlet mount  92 , and then expelled out of the water outlet orifice  22  in the pump head cover  20  (as shown in  FIG. 11  and indicated by arrowhead WP). 
         [0019]    Finally, orderly iterative action for each group of outlet ports  95  for the three sectors in central outlet mount  92  causes the pressurized water Wp to be constantly discharged out of the conventional compressing diaphragm pump to be further RO-filtered by the RO-cartridge so that the final filtered pressurized water Wp can be used in an reverse osmosis water purification system. 
         [0020]    Referring to  FIGS. 12 through 14 , a serious drawback caused by vibrations has long existed in the above-described conventional compressing diaphragm pump. As described previously, when the motor  10  is powered on, the wobble plate  40  is driven to rotate by the motor output shaft  11  so that three eccentric roundels  52  on the eccentric roundel mount  50  constantly and sequentially move in up-and-down reciprocal stroke, and in the meantime three pumping pistons  80  and three piston acting zones  74  in the diaphragm membrane  70  are sequentially driven by the up-and-down reciprocal stroke of the three eccentric roundels  52  to move in up-and-down displacement so that an equivalent force F constantly acts on the three piston acting zones  74  with a length of moment arm L 1  measured from the outer raised rim  71  to the periphery of the annular positioning protrusion  76  (as shown in  FIG. 13 ). Thereby, a resultant torque is created by the acting force F, multiplying the length of moment arm L 1  as shown by the formula “torque=acting force F×length of moment arm L 1 .” The resultant torque causes the whole conventional compressing diaphragm pump to vibrate directly. With a high rotational speed of the motor output shaft  11  in the motor  10  up to a range of 700-1200 rpm, the vibrating strength caused by alternate acting of the three eccentric roundels  52  can reach a persistently unacceptable condition. 
         [0021]    To address the direct vibration of the conventional compressing diaphragm pump, as shown in  FIG. 14 , a cushion base  100  with a pair of wing plates  101  is always provided as a supplemental support. Each wing plate  101  is further sleeved by a rubber shock absorber  102  for vibration suppressing enhancement. Upon installation of the conventional compressing diaphragm pump, the cushion base  100  is firmly screwed onto the housing C of the reverse osmosis purification unit by means of suitable fastening screws  103  and corresponding nuts  104 . However, the practical vibration suppressing efficiency of using the foregoing cushion base  100  with wing plates  101  and rubber shock absorber  102  only addresses the primary direct vibration, while reducing overall vibration only to a limited degree because the primary direct vibration causes a secondary vibration due to resonant shaking of the housing C to occur. This resonant shaking causes the overall vibration noise of the housing C of the reverse osmosis purification unit to become stronger. 
         [0022]    In addition to the drawback of increasing overall vibration noise of the housing C, a further drawback occurs in that the water pipe P connected on the water outlet orifice  22  of the pump head cover  20  will synchronously shake in resonance with the primary vibration (indicated by the hypothetic line a shown in  FIG. 14 ). This synchronous shaking of the water pipe P will result in still further drawbacks by causing other rest parts of the conventional compressing diaphragm pump to simultaneously shake. As a result, after a certain period, water leakage of the conventional compressing diaphragm pump will occur due to gradual loosening of the connection between water pipe P and water outlet orifice  22 , as well as gradual loosening fit between other parts affected by the shaking 
         [0023]    The additional drawbacks of overall resonant shaking and water leakage in the conventional compressing diaphragm pump cannot be solved by the conventional way of addressing the foregoing primary vibration drawback. How to substantially reduce all the drawbacks associated with the operating vibration of the compressing diaphragm pump has become an urgent and critical issue. 
       SUMMARY OF THE INVENTION 
       [0024]    An objective is to provide a vibration-reducing structure for a compressing diaphragm pump having a pump head body and a diaphragm membrane, in which the pump head body includes three operating holes and at least one basic curved groove, slot, or perforated segment, or a curved protrusion or set of protrusions, circumferentially disposed around at least a portion of the upper side of each operating hole, and in which the diaphragm membrane includes three equivalent piston acting zones each of which has an acting zone hole, an annular positioning protrusion for each acting zone hole, and at least one basic curved protrusion or set of protrusions, or a groove, slot, or perforated segment, at least partially circumferentially disposed around each concentric annular positioning protrusion at a position corresponding to the position of each mating basic curved groove in the pump head body so that the three basic curved protrusions are completely inserted into the corresponding three basic curved grooves, slots, or perforated segments with a short length of moment arm to generating less adverse vibration-causing torque, the torque being obtained by multiplying the length of the moment arm by a constant acting force. With less torque, the vibration strength of the compressing diaphragm pump is substantially reduced. 
         [0025]    Another objective is to provide a vibration-reducing structure for a compressing diaphragm pump that features a pump head body with at least three basic curved grooves, slots or perforated segments, or curved protrusions, and a diaphragm membrane with three basic curved protrusions, or curved grooves, slots, or perforated segments, such that three basic curved protrusions are completely inserted into corresponding three basic curved grooves, slots, or perforated segments with a short length of moment arm in generating less adverse vibration-causing torque, the torque being obtained by multiplying the length of the moment arm with a constant acting force. With less torque, the vibration strength of the compressing diaphragm pump is substantially reduced. Having the present invention installed on the housing of the reverse osmosis purification unit pillowed by a conventional cushion base with rubber shock absorber, the annoying noise caused by resonant shaking in the conventional compressing diaphragm pump can be completely eliminated. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]      FIG. 1  is a perspective assembled view of a conventional compressing diaphragm pump. 
           [0027]      FIG. 2  is a perspective exploded view of a conventional compressing diaphragm pump. 
           [0028]      FIG. 3  is a perspective view of a pump head body for the conventional compressing diaphragm pump. 
           [0029]      FIG. 4  is a cross sectional view taken against the section line  4 - 4  from previous  FIG. 3 . 
           [0030]      FIG. 5  is a top view of a pump head body for the conventional compressing diaphragm pump. 
           [0031]      FIG. 6  is a perspective view of a diaphragm membrane for the conventional compressing diaphragm pump. 
           [0032]      FIG. 7  is a cross sectional view taken against the section line  7 - 7  from previous  FIG. 6 . 
           [0033]      FIG. 8  is a bottom view of a diaphragm membrane for the conventional compressing diaphragm pump. 
           [0034]      FIG. 9  is a cross sectional view taken against the section line of  9 - 9  from previous  FIG. 1 . 
           [0035]      FIG. 10  is the first operation illustrative view of the conventional compressing diaphragm pump. 
           [0036]      FIG. 11  is the second operation illustrative view for conventional compressing diaphragm pump. 
           [0037]      FIG. 12  is the third operation illustrative view of the conventional compressing diaphragm pump with a partially enlarged view of a major circled-portion. 
           [0038]      FIG. 13  is a partially enlarged view taken from the circled-portion “a” in the enlarged view of previous  FIG. 12 . 
           [0039]      FIG. 14  is a schematic side view showing a conventional compressing diaphragm pump installed on a mounting base in a reverse osmosis purification system. 
           [0040]      FIG. 14(   a ) is a schematic end view of the conventional compressing diaphragm pump installed on a mounting base, as illustrated in  FIG. 14 . 
           [0041]      FIG. 15  is a perspective exploded view of the first exemplary embodiment of the present invention. 
           [0042]      FIG. 16  is a perspective view of a pump head body in the first exemplary embodiment of the present invention. 
           [0043]      FIG. 17  is a cross sectional view taken against the section line  17 - 17  from previous  FIG. 16 . 
           [0044]      FIG. 18  is a top view of the pump head body in the first exemplary embodiment of the present invention. 
           [0045]      FIG. 19  is a perspective view of a diaphragm membrane in the first exemplary embodiment of the present invention. 
           [0046]      FIG. 20  is a cross sectional view taken against the section line  20 - 20  from previous  FIG. 19 . 
           [0047]      FIG. 21  is a bottom view of the diaphragm membrane in the first exemplary embodiment of the present invention. 
           [0048]      FIG. 22  is an assembled cross sectional view of the first exemplary embodiment of the present invention. 
           [0049]      FIG. 23  is an operation illustrative view for the first exemplary embodiment of the present invention with a partially enlarged view of the major circled-portion. 
           [0050]      FIG. 24  is a partially enlarged view taken from the circled-portion “a” in the enlarged view of previous  FIG. 23 . 
           [0051]      FIG. 25  is a perspective view of another pump head body in the first exemplary embodiment of the present invention. 
           [0052]      FIG. 26  is a cross sectional view taken against the section line  26 - 26  from previous  FIG. 25 . 
           [0053]      FIG. 27  is a cross sectional view of another pump head body and separated diaphragm membrane in the first exemplary embodiment of the present invention. 
           [0054]      FIG. 28  is a cross sectional view a combination of the pump head body and diaphragm membrane of  FIG. 27 . 
           [0055]      FIG. 29  is a perspective view of a pump head body in the second exemplary embodiment of the present invention. 
           [0056]      FIG. 30  is a cross sectional view taken against the section line  30 - 30  from previous  FIG. 29 . 
           [0057]      FIG. 31  is a top view of the pump head body in the second exemplary embodiment of the present invention. 
           [0058]      FIG. 32  is a perspective view of a diaphragm membrane in the second exemplary embodiment of the present invention. 
           [0059]      FIG. 33  is a cross sectional view taken against the section line  33 - 33  from previous  FIG. 32 . 
           [0060]      FIG. 34  is a bottom view of a diaphragm membrane in the second exemplary embodiment of the present invention. 
           [0061]      FIG. 35  is a cross sectional view of a combination of the pump head body and diaphragm membrane in the second exemplary embodiment of the present invention. 
           [0062]      FIG. 36  is a perspective view for another pump head body in the second exemplary embodiment of the present invention. 
           [0063]      FIG. 37  is a cross sectional view taken against the section line  37 - 37  from previous  FIG. 36 . 
           [0064]      FIG. 38  is a cross sectional view of another pump head body and separated diaphragm membrane in the second exemplary embodiment of the present invention. 
           [0065]      FIG. 39  is a cross sectional view of a combination of the pump head body and diaphragm membrane of  FIG. 38 . 
           [0066]      FIG. 40  is a perspective view of a pump head body in the third exemplary embodiment of the present invention. 
           [0067]      FIG. 41  is a cross sectional view taken against the section line  41 - 41  from previous  FIG. 40 . 
           [0068]      FIG. 42  is a top view of a pump head body in the third exemplary embodiment of the present invention. 
           [0069]      FIG. 43  is a perspective view of a diaphragm membrane in the third exemplary embodiment of the present invention. 
           [0070]      FIG. 44  is a cross sectional view taken against the section line  44 - 44  from previous  FIG. 43 . 
           [0071]      FIG. 45  is a bottom view of a diaphragm membrane in the third exemplary embodiment of the present invention. 
           [0072]      FIG. 46  is a cross sectional view of a combination of the pump head body and diaphragm membrane in the third exemplary embodiment of the present invention. 
           [0073]      FIG. 47  is a perspective view of another pump head body in the third exemplary embodiment of the present invention. 
           [0074]      FIG. 48  is a cross sectional view taken against the section line  48 - 48  from previous  FIG. 47 . 
           [0075]      FIG. 49  is a cross sectional view of another pump head body and separated diaphragm membrane in the third exemplary embodiment of the present invention. 
           [0076]      FIG. 50  is a cross sectional view of a combination of the pump head body and diaphragm membrane of  FIG. 49 . 
           [0077]      FIG. 51  is a perspective view of the pump head body in the fourth exemplary embodiment of the present invention. 
           [0078]      FIG. 52  is a cross sectional view taken against the section line  52 - 52  from previous  FIG. 51 . 
           [0079]      FIG. 53  is a top view of the pump head body in the fourth exemplary embodiment of the present invention. 
           [0080]      FIG. 54  is a perspective view of a diaphragm membrane in the fourth exemplary embodiment of the present invention. 
           [0081]      FIG. 55  is a cross sectional view taken against the section line  55 - 55  from previous  FIG. 54 . 
           [0082]      FIG. 56  is a bottom view of the diaphragm membrane in the fourth exemplary embodiment of the present invention. 
           [0083]      FIG. 57  is a cross sectional view of a combination of the pump head body and diaphragm membrane in the fourth exemplary embodiment of the present invention. 
           [0084]      FIG. 58  is a perspective view for another pump head body in the fourth exemplary embodiment of the present invention. 
           [0085]      FIG. 59  is a cross sectional view taken against the section line  59 - 59  from previous  FIG. 58 . 
           [0086]      FIG. 60  is a cross sectional view of another pump head body and separated diaphragm membrane in the fourth exemplary embodiment of the present invention. 
           [0087]      FIG. 61  is a cross sectional view of a combination of the pump head body and diaphragm membrane of  FIG. 60 . 
           [0088]      FIG. 62  is a perspective view OF A pump head body in the fifth exemplary embodiment of the present invention. 
           [0089]      FIG. 63  is a cross sectional view taken against the section line of  63 - 63  from previous  FIG. 62 . 
           [0090]      FIG. 64  is a top view of the pump head body in the fifth exemplary embodiment of the present invention. 
           [0091]      FIG. 65  is a perspective view of the diaphragm membrane in the fifth exemplary embodiment of the present invention. 
           [0092]      FIG. 66  is a cross sectional view taken against the section line  66 - 66  from previous  FIG. 65 . 
           [0093]      FIG. 67  is a bottom view for diaphragm membrane in the fifth exemplary embodiment of the present invention. 
           [0094]      FIG. 68  is a cross sectional view of a combination of the pump head body and diaphragm membrane in the fifth exemplary embodiment of the present invention. 
           [0095]      FIG. 69  is a perspective view of another pump head body in the fifth exemplary embodiment of the present invention. 
           [0096]      FIG. 70  is a cross sectional view taken against the section line  70 - 70  from previous  FIG. 69 . 
           [0097]      FIG. 71  is a cross sectional view of another pump head body and separated diaphragm membrane in the fifth exemplary embodiment of the present invention. 
           [0098]      FIG. 72  is a cross sectional view of a combination of the pump head body and diaphragm membrane of  FIG. 71 . 
           [0099]      FIG. 73  is a perspective view of a pump head body in the sixth exemplary embodiment of the present invention. 
           [0100]      FIG. 74  is a cross sectional view taken against the section line  74 - 74  from previous  FIG. 73 . 
           [0101]      FIG. 75  is a top view of the pump head body in the sixth exemplary embodiment of the present invention. 
           [0102]      FIG. 76  is a perspective view of the diaphragm membrane in the sixth exemplary embodiment of the present invention. 
           [0103]      FIG. 77  is a cross sectional view taken against the section line  77 - 77  from previous  FIG. 76 . 
           [0104]      FIG. 78  is a bottom view of the diaphragm membrane in the sixth exemplary embodiment of the present invention. 
           [0105]      FIG. 79  is a cross sectional view of a combination of the pump head body and diaphragm membrane in the sixth exemplary embodiment of the present invention. 
           [0106]      FIG. 80  is a perspective view of another pump head body in the sixth exemplary embodiment of the present invention. 
           [0107]      FIG. 81  is a cross sectional view taken against the section line  81 - 81  from previous  FIG. 80 . 
           [0108]      FIG. 82  is a cross sectional view of another pump head body and separated diaphragm membrane in the sixth exemplary embodiment of the present invention. 
           [0109]      FIG. 83  is a cross sectional view of a combination of the pump head body and diaphragm membrane of  FIG. 82 . 
           [0110]      FIG. 84  is a top view of a pump head body in the seventh exemplary embodiment of the present invention. 
           [0111]      FIG. 85  is a bottom view of a diaphragm membrane in the seventh exemplary embodiment of the present invention. 
           [0112]      FIG. 86  is a cross sectional view of a combination of the pump head body and diaphragm membrane in the seventh exemplary embodiment of the present invention. 
           [0113]      FIG. 87  is a perspective view of another pump head body in the seventh exemplary embodiment of the present invention. 
           [0114]      FIG. 88  is a cross sectional view taken against the section line  88 - 88  from previous  FIG. 87 . 
           [0115]      FIG. 89  is a cross sectional view of another pump head body and separated diaphragm membrane in the seventh exemplary embodiment of the present invention. 
           [0116]      FIG. 90  is a cross sectional view of a combination of the pump head body and diaphragm membrane of  FIG. 89 . 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0117]      FIGS. 15 through 22  are illustrative figures of a first exemplary embodiment of a vibration-reducing structure for a compressing diaphragm pump. 
         [0118]    A basic curved groove  65  is circumferentially disposed around a portion of the upper side of each operating hole  61  in the pump head body  60  while a basic curved protrusion  77  is circumferentially disposed around a portion of each concentric annular positioning protrusion  76  at the bottom side of the diaphragm membrane  70  such that positions of the basic curved groove  65  and curved protrusion  77  correspond to each other, enabling the curved protrusion  77  to extend into and thereby mate with the basic curved groove  65 . 
         [0119]    Each of the basic curved protrusions  77  at the bottom side of the diaphragm membrane  70  is completely inserted into each of the corresponding basic curved grooves  65  at the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 22  and associated enlarged view) with the result that a short length of moment arm L 2  from the basic curved protrusions  77  to the peripheral of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as shown in  FIG. 24 ). 
         [0120]    Referring to  FIGS. 23 ,  24 ,  13 ,  14 , and  14 ( a ), which are illustrative figures for the practical operation result in the first exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0121]    Comparing to the operation of conventional compressing diaphragm pump, the length of moment arm L 1  from the outer raised rim  71  to the periphery of the annular positioning protruding block  76  in the diaphragm membrane  70  in the conventional compressing diaphragm pump is shown in  FIGS. 13 and 24 ), and the length of moment arm L 2  from the basic curved protrusions  77  to the peripheral of the annular positioning protruding block  76  in the diaphragm membrane  70  obtained in the operation of the first exemplary embodiment is shown in  FIG. 24 . 
         [0122]    The illustration of the foregoing comparative result shows that the length of moment arm L 2  is shorter than the length of moment arm L 1 . 
         [0123]    While the resultant torque is calculated by the same acting force F multiplying the length of moment arm, the resultant torque of the present invention is smaller than that of the conventional compressing diaphragm pump since the length of moment arm L 2  is shorter than the length of moment arm L 1 . 
         [0124]    With the smaller resultant torque of the present invention, the related vibration strength related is substantially reduced. 
         [0125]    Through practical pilot testing of a sample of the present invention, the result shows that the resulting vibration strength is only one tenth (10%) of the vibration strength in the conventional compressing diaphragm pump. 
         [0126]    If the present invention is installed on the housing C of the reverse osmosis purification unit pillowed by a conventional cushion base  100  with a rubber shock absorber  102  (as shown in  FIGS. 14 and 14(   a )), the annoying noise from the resonant shaking incurred in the conventional compressing diaphragm pump can be completely eliminated. 
         [0127]    As shown in  FIGS. 25 and 26 , in the first exemplary embodiment, each basic curved groove  65  of the pump head body  60  can be adapted into a basic curved slot or bore  64  that extends through the pump head body  60 . 
         [0128]    As shown in  FIGS. 27 and 28 , in the first exemplary embodiment, each basic curved groove  65  in the pump head body  60  (as shown in  FIGS. 16 and 17 ) and each corresponding basic curved protrusion  77  in the diaphragm membrane  70  (as shown in  FIGS. 20 and 21 ) can be exchanged to provide a basic curved protrusion  651  in the pump head body  60  (as shown in  FIG. 27 ) and a corresponding basic curved groove  771  in the diaphragm membrane  70  (as shown in  FIG. 28 ) without affecting their mating condition. 
         [0129]    Each basic curved protrusion  651  at the upper side of the pump head body  60  is completely inserted into each corresponding basic curved groove  771  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 28 ), with the result that a short length of moment arm L 3  from the basic curved indent  771  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 28  and the associated enlarged view), so that the newly devised contrivances of pump head body  60  and diaphragm membrane  70  have a significant effect in reducing vibration as well. 
         [0130]    Referring to  FIGS. 29 through 35 , which are illustrative figures for the second exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0131]    A second outer curved groove  66  is further circumferentially disposed around each existing basic curved groove  65  in the pump head body  60  (as shown in  FIGS. 29 through 31 ) while a second outer curved protrusion  78  is further circumferentially disposed around each existing basic curved protrusion  77  in the diaphragm membrane  70  at a position corresponding to the position of each mating second outer curved groove  66  in the pump head body  60  (as shown in  FIGS. 33 and 34 ). 
         [0132]    Each pair of basic curved protrusion  77  and second outer curved protrusion  78  at the bottom side of the diaphragm membrane  70  is completely inserted into each pair of corresponding basic curved groove  65  and second outer curved groove  66  at the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 35  and the associated enlarged view), with the result that a short length of moment arm L 2  from the basic curved protrusion  77  to the peripheral of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as shown in  FIG. 35  and associated enlarged view). 
         [0133]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have a significant effect in reducing vibration, but also provide enhanced steadiness in preventing relative displacement of the pump head body  60  and diaphragm member  70  and maintaining the length of moment arm L 2  for resisting against the acting force F on the eccentric roundel  52 . 
         [0134]    As shown in  FIGS. 36 and 37 , in the second exemplary embodiment, each pair of basic curved groove  65  and second outer curved groove  66  of the pump head body  60  can be replaced by a pair of basic curved slots or bores  64  and second outer curved slots or bores  67 . 
         [0135]    As shown in  FIGS. 38 and 39 , in the second exemplary embodiment, each pair of basic curved groove  65  and second outer curved groove  66  in the pump head body  60  (as shown in  FIGS. 29 to 31 ) and each corresponding pair of basic curved protrusion  77  and second outer curved protrusion  78  in the diaphragm membrane  70  (as shown in  FIGS. 33 and 34 ) can be exchanged with a pair of basic curved protrusion  651  and second outer curved protrusion  661  in the pump head body  60  (as shown in  FIG. 28 ) and a pair of corresponding basic curved grove  771  and second outer curved groove  781  in the diaphragm membrane  70  (as shown in  FIG. 38 ) without affecting their mating condition. 
         [0136]    Each pair of basic curved protrusion  651  and second outer curved protrusion  661  at the upper side of the pump head body  60  is completely inserted into each corresponding pair of basic curved groove  771  and second outer curved groove  781  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 39 ), with the result that a short length of moment arm L 3  from the basic curved groove  771  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 39  and the associated enlarged view). 
         [0137]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have a significant effect in reducing vibration, but also enhance steadiness by preventing relative displacement and maintaining the length of moment arm L 2 . 
         [0138]      FIGS. 40 through 46  are illustrative figures for the third exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0139]    A basic indented ring  601  is further circumferentially disposed around each existing operating hole  61  in the pump head body  60  (as shown in  FIGS. 40 through 42 ) while a basic protruding ring  701  is further circumferentially disposed around each existing annular positioning protrusion  76  in the diaphragm membrane  70  at a position corresponding to a position of each mating basic indented ring  601  in the pump head body  60  (as shown in  FIGS. 44 and 45 ). 
         [0140]    Each basic protruding ring  701  at the bottom side of the diaphragm membrane  70  is completely inserted into each corresponding basic indented ring  601  in the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 46 ) with the result that a short length of moment arm L 2  from the basic protruding ring  701  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as shown in  FIG. 46 ). 
         [0141]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only has a significant effect in reducing vibration, but also enhances steadiness by preventing relative displacement and maintaining the length of moment arm L 2  for resisting against the acting force F on the eccentric roundel  52 . 
         [0142]    As shown in  FIGS. 47 and 48 , in the third exemplary embodiment, each basic indented ring  601  of the pump head body  60  can be adapted into a basic perforated hole  600 . 
         [0143]    As shown in  FIGS. 49 and 50 , in the third exemplary embodiment, each basic indented ring  601  in the pump head body  60  (as shown in  FIGS. 40 to 42 ) and each corresponding basic protruding ring  701  in the diaphragm membrane  70  (as shown in  FIGS. 44 and 45 ) can be exchanged with a basic protruding ring  610  in the pump head body  60  (as shown in  FIG. 27 ) and a corresponding basic indented ring  710  in the diaphragm membrane  70  (as shown in  FIG. 50 ) without affecting their mating condition. 
         [0144]    Each basic protruding ring  610  at the upper side of the pump head body  60  is completely inserted into each corresponding basic indented ring  710  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 50 ) with the result that a short length of moment arm L 3  from the basic indented ring  710  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 50 ) so that the newly devised contrivances of pump head body  60  and diaphragm membrane  70  have a significant effect in reducing vibration as well. 
         [0145]      FIGS. 51 through 57  are illustrative figures for the fourth exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0146]    A pair of curved indented segments  602  is further circumferentially disposed around each existing operating hole  61  in the pump head body  60  (as shown in  FIGS. 51 through 53 ) while a pair of curved protruding segments  702  is further circumferentially disposed around each existing annular positioning protrusion  76  in the diaphragm membrane  70  at a position corresponding to a position of each mating curved indented segment  602  in the pump head body  60  (as shown in  FIGS. 55 and 56 ). 
         [0147]    Each pair of curved protruding segments  702  at the bottom side of the diaphragm membrane  70  is completely inserted into each corresponding pair of curved indented segments  602  at the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 57 ) with the result that a short length of moment arm L 2  from the curved protruding segment  702  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as shown in  FIG. 57 ). 
         [0148]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have a significant effect in reducing vibration but also enhance steadiness by preventing relative displacement and maintaining the length of moment arm L 2 . 
         [0149]    As shown in  FIGS. 58 and 59 , in the fourth exemplary embodiment, each pair of curved indented segments  602  of the pump head body  60  can be replaced by a pair of curved perforated segments  611 . 
         [0150]    As shown in  FIGS. 60 and 61 , in the fourth exemplary embodiment, each pair of curved indented segments  602  in the pump head body  60  (as shown in  FIGS. 51 to 53 ) and each corresponding pair of curved protruding segments  702  in the diaphragm membrane  70  (as shown in  FIGS. 55 and 56 ) can be exchanged with a pair of curved protruding segments  620  in the pump head body  60  (as shown in  FIG. 60 ) and a pair of corresponding curved indented segments  720  in the diaphragm membrane  70  (as shown in  FIG. 61 ) without affecting their mating condition. 
         [0151]    Each pair of curved protruding segments  620  at the upper side of the pump head body  60  is completely inserted into each pair of corresponding curved indented segments  720  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 61 ) with the result that a short length of moment arm L 3  from the curved indented segment  720  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 61 ) so that the newly devised contrivances of pump head body  60  and diaphragm membrane  70  have a significant effect in reducing vibration as well. 
         [0152]      FIGS. 62 through 68  are illustrative figures for the fifth exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0153]    A group of round indents  603  are further circumferentially disposed around each existing operating hole  61  in the pump head body  60  (as shown in  FIGS. 62 through 64 ) while a group of round protrusions  703  are further circumferentially disposed around each existing annular positioning protrusion  76  in the diaphragm membrane  70  at a position corresponding position corresponding to the position of each group of mating round indents  603  in the pump head body  60  (as shown in  FIGS. 66 and 67 ). 
         [0154]    Each group of round protrusions  703  at the bottom side of the diaphragm membrane  70  is completely inserted into each corresponding group of round indents  603  at the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 68 ) with the result that a short length of moment arm L 2  from the round protrusion  703  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as also shown in  FIG. 68 ). 
         [0155]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have significant effect in reducing vibration as well but also enhance the steadiness by preventing relative displacement and maintaining the length of moment arm L 2 . 
         [0156]    As shown in  FIGS. 69 and 70 , in the fifth exemplary embodiment, each group of round indents  603  in the pump head body  60  can be replaced by a group of round perforated holes  612 . 
         [0157]    As shown in  FIGS. 71 and 72 , in the fifth exemplary embodiment, each group of round indents  603  in the pump head body  60  (as shown in  FIGS. 62 to 64 ) and each corresponding group of round protrusions  703  in the diaphragm membrane  70  (as shown in  FIGS. 66 and 67 ) can be exchanged with a group of round protrusions  630  in the pump head body  60  (as shown in  FIG. 71 ) and a group of corresponding round indents  730  in the diaphragm membrane  70  (as shown in  FIG. 71 ) without affecting their mating condition. 
         [0158]    Each group of round protrusions  630  at the upper side of the pump head body  60  is completely inserted into each group of corresponding round indents  730  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 72 ) with the result that a short length of moment arm L 3  from the round indents  730  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 72 ) so that the newly devised contrivances of pump head body  60  and diaphragm membrane  70  have significant effect in reducing vibration as well. 
         [0159]      FIGS. 73 through 79  are illustrative figures for the sixth exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0160]    A group of square indents  604  are further circumferentially disposed around each existing operating hole  61  in the pump head body  60  (as shown in  FIGS. 73 through 75 ) while a group of square protrusions  704  are further circumferentially disposed around each existing annular positioning protrusion  76  in the diaphragm membrane  70  in a corresponding position with each mating group of square indents  604  in the pump head body  60  (as shown in  FIGS. 77 and 78 ). 
         [0161]    Each group of square protrusions  704  at the bottom side of the diaphragm membrane  70  is completely inserted into each corresponding group of square indents  604  at the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 79  and enlarged view of association) with the result that a short length of moment arm L 2  from the square protrusions  704  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as shown in  FIG. 79  and enlarged view of association). 
         [0162]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have a significant effect in reducing vibration but also enhance steadiness by preventing relative displacement and maintaining the length of moment arm L 2 . 
         [0163]    As shown in  FIGS. 80 and 81 , in the sixth exemplary embodiment, each group of square indents  604  in the pump head body  60  can be replaced by a group of square perforated holes  613 . 
         [0164]    As shown in  FIGS. 82 and 83  in the sixth exemplary embodiment, each group of square indents  604  in the pump head body  60  (as shown in  FIGS. 73 to 75 ) and each corresponding group of square protrusions  704  in the diaphragm membrane  70  (as shown in  FIGS. 77 and 78 ) can be exchanged with a group of square protrusions  640  in the pump head body  60  (as shown in  FIG. 82 ) and a group of corresponding square indents  740  in the diaphragm membrane  70  (as shown in  FIG. 82 ) without affecting their mating condition. 
         [0165]    Each group of square protrusions  640  at the upper side of the pump head body  60  is completely inserted into each group of corresponding square indents  740  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 83 ) with the result that a short length of moment arm L 3  from the square indents  740  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 83  and enlarged view of association) so that the newly devised contrivances of pump head body  60  and diaphragm membrane  70  have significant effect in reducing vibration as well. 
         [0166]      FIGS. 84 through 86  are illustrative figures for the seventh exemplary embodiment of the vibration-reducing structure for compressing diaphragm pump of the present invention. 
         [0167]    A pair of concentric first inner indented ring  605  and second outer indented ring  606  are further circumferentially disposed around each existing operating hole  61  in the pump head body  60  (as shown in  FIG. 84 ) while a pair of concentric first inner protruding ring  705  and second outer protruding ring  706  are further circumferentially disposed around each existing annular positioning protrusion  76  in the diaphragm membrane  70  at a position corresponding to a position of each mating pair of first inner indented ring  605  and second outer indented ring  606  in the pump head body  60  (as shown in  FIG. 85 ). 
         [0168]    Each pair of first inner protruding ring  705  and second outer protruding ring  706  at the bottom side of the diaphragm membrane  70  is completely inserted into each pair of corresponding first inner indented ring  605  and second outer indented ring  606  at the upper side of the pump head body  60  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 86 ) with the result that a short length of moment arm L 2  from the first inner protruding ring  705  to the peripheral of the annular positioning protrusion  76  in the diaphragm membrane  70  is obtained in the operation of the present invention (as shown in  FIG. 86 ). 
         [0169]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have significant effect in reducing vibration but also enhance steadiness by preventing relative displacement and maintaining the length of moment arm L 2  for resisting against the acting force F on the eccentric roundel  52 . 
         [0170]    As shown in  FIGS. 87 and 88 , in the seventh exemplary embodiment, each pair of concentric first inner indented ring  605  and second outer indented ring  606  in the pump head body  60  can be replaced by a pair of concentric first inner perforated ring  614  and second outer perforated ring  615 . 
         [0171]    As shown in  FIGS. 89 and 90 , in the seventh exemplary embodiment, each pair of concentric first inner indented ring  605  and second outer indented ring  606  in the pump head body  60  (as shown in  FIG. 84 ) and each corresponding pair of concentric first inner protruding ring  705  and second outer protruding ring  706  in the diaphragm membrane  70  (as shown in  FIGS. 77 and 78 ) can be exchanged with a pair of concentric first inner protruding ring  650  and second outer protruding ring  660  in the pump head body  60  (as shown in  FIG. 89 ) and a corresponding pair of concentric first inner indented ring  750  and second outer indented ring  760  in the diaphragm membrane  70  (as shown in  FIG. 89 ) without affecting their mating condition. 
         [0172]    Each pair of first inner protruding ring  650  and second outer protruding ring  660  at the upper side of the pump head body  60  completely is inserted into each corresponding pair of first inner indented ring  750  and second outer indented ring  760  at the bottom side of the diaphragm membrane  70  upon assembly of the pump head body  60  and the diaphragm membrane  70  (as shown in  FIG. 90 ) with the result that a short length of moment arm L 3  from the first inner indented ring  750  to the periphery of the annular positioning protrusion  76  in the diaphragm membrane  70  is also obtained in the operation of the present invention (as shown in  FIG. 90 ). 
         [0173]    The newly devised contrivances of pump head body  60  and diaphragm membrane  70  not only have significant effect in reducing vibration, but also enhance steadiness by preventing relative displacement and maintaining the length of moment arm L 3 . 
         [0174]    Based on the foregoing disclosure, the present invention substantially achieves the vibration reducing effect of the compressing diaphragm pump by means of simple newly devised pump head body  60  and diaphragm membrane  70  without increasing overall cost. The present invention surely solves all issues of noise and resonant shaking to which the conventional compressing diaphragm pump is subject, and thus the invention has valuable industrial applicability.