Abstract:
A device for converting a rotating mod on into a reciprocating notion comprises a rotatable shaft carrying a first cylindrical element, an embedded cam groove of the first cylindrical element, a second rod element constrained to move back and forth and forth, and a cam follower carried on the second rod element. The cam follower may be engaged in the embedded cam groove of the first cylindrical element so that as the rotatable shaft rotates, the cam follower transmits the movement dictated by the embedded cam groove profile thereby causing the second rod element to move back and forth transmits power. There is also disclosed an mascara applicator assembly; an first electric toothbrush assembly comprising such a device, and an second electric toothbrush assembly comprising such a device.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    Many mechanical assemblies such as internal combustion or steam engines and cutting or stamping machines convert a relating motion into a reciprocating motion or a reciprocating motion into a rotating motion. Although cranks and crankshafts are ideal in these large assemblies they become cumbersome and inconvenient when applied to any small hand-held devices especially a mascara applicator. Therefore, there is a need for a compact, lightweight mechanism to achieve the converting a rotating motion into a reciprocating motion for use in small hand-held devices. 
       FIELD OF THE INVENTION 
       [0002]    The present invention relates to a device tor converting a rotating motion into a reciprocating motion tor use, for example, in a mascara applicator assembly and in an electric toothbrush assembly having such a device. However, the present invention is not limited to minute devices. 
       SUMMARY OF THE INVENTION 
       [0003]    The present invention proposes a device for converting a rotating motion into a reciprocating motion. 
         [0004]    According to a first aspect of the present invention these is provided a device for converting a rotating motion into a reciprocating motion comprising:
       a rotatable shaft carrying a first cylindrical element having a embedded cam groove therein;   a second rod element constrained to move back and forth; and   a cam follower carried on the second rod element for engagement in the embedded cam groove of the first cylindrical element so that as the rotatable shaft rotates, the cam follower transmits the movement dictated by the embedded cam groove profile thereby causing the second rod element to move back and forth.       
 
         [0008]    According the second aspect of the present invention there is provided an mascara applicator assembly comprising the said device defined above. 
         [0009]    According the third aspect of the present invention there is provided an first electric toothbrush assembly comprising the said device defined above. 
         [0010]    According the fourth aspect of the present invention there is provided an second electric toothbrush assembly comprising the said device defined above 
         [0011]    An advantage of one or more of the embodiments of the present invention is that the conversion of the rotating motion into a reciprocating motion is in its simplest form. Thereby, the mechanism is simple to construct and may be used in small device such as said above assemblies. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0012]    For the sake of illustration the preferred features of the invention will now be described with reference to the following figures in which: 
           [0013]      FIG. 1  is a cross-sectional view of the mascara applicator assembly including a reciprocating drive mechanism according to an embodiment of the invention. 
           [0014]      FIG. 2  is a cross-sectional view of the mascara applicator assembly including a reciprocating drive mechanism according to an embodiment of the invention showing a different battery type. 
           [0015]      FIG. 3  is a cross-sectional view of the mascara applicator assembly including a reciprocating drive mechanism according to an embodiment of the invention showing a tube to constrain a second rod element. 
           [0016]      FIG. 4  is a first progressive view of a reciprocating drive mechanism of the mascara applicator assembly in operation. 
           [0017]      FIG. 5  is a second progressive view of a reciprocating drive mechanism of the mascara applicator assembly in operation. 
           [0018]      FIG. 6  is a third progressive view of a reciprocating drive mechanism of the mascara applicator assembly in operation. 
           [0019]      FIG. 7  is a fourth progressive view of a reciprocating drive mechanism of a mascara applicator assembly in operation. 
           [0020]      FIG. 8  is a fifth progressive view of a reciprocating drive mechanism of a mascara applicator assembly in operation. 
           [0021]    FIG  9  is a partial cross-sectional top view of the electric toothbrush assembly including a reciprocating drive mechanism according to an embodiment of the invention. 
           [0022]      FIG. 10  is a first progressive view of a reciprocating drive mechanism of the electric toothbrush assembly in operation. 
           [0023]      FIG. 11  is a second progressive view of a reciprocating drive mechanism of the electric toothbrush assembly in operation. 
           [0024]      FIG. 12  is a third progressive view of a reciprocating drive mechanism of the electric toothbrush assembly in operation. 
           [0025]      FIG. 13  is a fourth progressive view of a reciprocating drive mechanism of the electric toothbrush assembly in operation. 
           [0026]      FIG. 14  is a fifth progressive view of a reciprocating drive mechanism of the electric toothbrush assembly in operation. 
           [0027]      FIG. 15  is a upper partial cross-sectional top view of the electric toothbrush assembly. 
           [0028]      FIG. 16  is a upper partial cross-sectional right side view of the electric toothbrush assembly. 
           [0029]      FIG. 17  is a upper partial cross-sectional left side view of the electric toothbrush assembly. 
           [0030]      FIG. 18  is a top view of the upper electric toothbrush assembly. 
           [0031]      FIG. 19  is a top partial cross-sectional view of the upper electric toothbrush assembly. 
           [0032]      FIG. 20  is a cross-sectional top view of the electric toothbrush assembly having a detachable head where said detachable head is detached and further includes a reciprocating drive mechanism according to an embodiment of the invention. 
           [0033]      FIG. 21  is a cross-sectional top view of the electric toothbrush assembly having a detachable head where said detachable bead is attached and further includes a reciprocating drive mechanism according to an embodiment of the invention. 
           [0034]      FIG. 22  is a first progressive view of the reciprocating drive mechanism of the electric toothbrush assembly having a detachable head in operation. 
           [0035]    FIG  23  is a second progressive view of a reciprocating drive mechanism of the electric toothbrush assembly having a detachable head in operation. 
           [0036]      FIG. 24  is a third progressive view of a reciprocating drive mechanics of the electric toothbrush assembly having a detachable bead in operation. 
           [0037]      FIG. 25  is a fourth progressive view of a reciprocating drive mechanism of the electric toothbrush assembly having a detachable head in operation. 
           [0038]      FIG. 26  is a fifth progressive view of a reciprocating drive mechanism of the electric toothbrush assembly having a detachable head in operation. 
           [0039]      FIG. 27  is an upper partial cross-sectional top view of the electric toothbrush having a detachable head assembly. 
           [0040]      FIG. 28  is an upper partial cross-sectional right side view of the electric toothbrush having a detachable head assembly. 
           [0041]      FIG. 29  is an upper partial cross-sectional left side view of the electric toothbrush having a detachable head assembly. 
           [0042]      FIG. 30  is a top view of the upper electric toothbrush having a detachable head assembly. 
           [0043]      FIG. 31  is a top partial cross-sectional view of the upper electric toothbrush having a detachable bead assembly. 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0044]      FIG. 1  shows an electric mascara applicator assembly  1  which comprises a motor  2  encased in a motor housing  3 . Motor housing  3  is embedded in housing  4 . The motor  2  includes motor shaft  5  on which cylindrical wheel  6  is attached. The cylindrical wheel  6  has a embedded cam groove track  7  in which a cam follower pin  8  is loosely seated, as shown in  FIG. 4 . The cam follower pin  8  is attached to a reciprocating push-pull rod  9 , as shown in  FIG. 4 . Brush bead  10 , as shown in  FIG. 1 , is attached to the other end of reciprocating push-pull rod  9 . A cordon of the reciprocating push-pull rob  9  is constrained by a portion of housing  4  thereby constraining the movement of the entire reciprocating push-pull rod  9 . A flat circular stop limiter  11  is attached to the reciprocating push-pull rod  9 . The bellows expansion seal seat  12  is attached to the outer bottom housing  13 . The bellows expansion seal seat  14  is attached to the reciprocating push-pull rod  9 . The bellows expansion seal  15  is seated in bellows expansion seal seat  12  and bellows expansion seal seat  14 . Air vent  16  is embedded in housing  4 , as shown in  FIG. 1 . 
         [0045]    The reciprocating push-pull rod  9  may be constrained by a tube  17  retained within the housing  4 , as shown in  FIG. 3 . At the other end of the motor shaft  5  to that carrying the cylindrical wheel  6 , an optional weight  18 , as shown in  FIG. 2 , may be attached. As shown in  FIG. 1 , batteries  19  rest within battery compartment  20  which is embedded in housing  4 . Removable negative battery contact  21  is held firmly in place by end cap  22 . As shown in  FIG. 2 , batteries  23  rest within battery compartment  24  which is embedded in housing  4 . Removable positive and negative battery contact  25  is held firmly in place by end cap  22 . Mascara applicator assembly  1  further composes detachable cosmetic tank  26  which is designed to distribute mascara evenly upon brush  10  when brush  10  is removed from cosmetic tank  26  by brush  10  heavy pulled through trimmer  27 . 
         [0046]    The motor  2  is driven by one or more batteries  19 , as shown in  FIG. 1  or another type of primary batteries  23 , as shown in  FIG. 2 . The motor  2  is driven by one or more batteries  19 , as shown in  FIG. 1  or another type of primary batteries  23 , as shown in  FIG. 2 . Motor  2  may be powered by a battery pack, which may be of the lithium-ion type for ready charging via a secondary voltage cod and an integral male socket portion within housing  4 , not shown. Said male socket portion is detachably received in a corresponding female socket portion provided in a charger base assembly having a primary charging coil, also not shown. The electrical circuit would be defined with one side of the secondary coil attached to a negative battery terminal connector and the other side of the secondary coil coupled through a diode to the positive battery terminal. The diode rectifies voltage out-puts from the coil, also no shown. Other prior art charging circuitry may be used. Motor  2  is controlled by an on-off switch  28 . 
         [0047]    In operation, the user starts the motor  2  by moving the on-off switch  28  to the on position. As the cylindrical wheel  6  that is mounted on motor shaft  5  is rotated by the motor  2 , the cam follower pin  8  follows the groove of the embedded cam groove track  7  to produce the desired back and forth motion of the reciprocating push-pull rod  9 . The shape of the embedded cam groove track  7  defines the distance that the reciprocating push-pull rod  9  and the attached brush head  10  move back and forth. As the reciprocating push-pull rod  9  moves forth the bellows expansion seal  15  expands, as shown in  FIG. 1 , and as the reciprocating push-pull rod  9  moves back the bellows expansion seal  15  contracts, as shown in  FIG. 2  The bellows expansion seal  15  maintains the seal of the opening between the reciprocating push-pull rod  9  and the opening of that portion of housing  4  that constrains the reciprocating push-pull nod  9 . Air vent  16  provides a means for air to flow freely during the expansion and contraction of the bellows expansion seal  15 . 
         [0048]    A partial progressive sequence of events illustrating one complete cycle of the reciprocating drive mechanism for a electric mascara applicator assembly  1  of the type shown in  FIG. 1  is shown in  FIGS. 4 ,  5 ,  6 ,  7  and  8 . In  FIGS. 4 ,  5 ,  6 ,  7  and  8  motor  2  is rotating motor shaft  5  counterclockwise. In  FIG. 4  the embedded cam groove track  7  is at its closest point to casing surface of motor  2 . As the motor shaft  5  rotates counterclockwise the cam follower pin  8  follows the groove of the embedded cam groove track  7  and causes the reciprocating push-pull rod  9  and brush head  10  to move forth, as shown in  FIG. 5  until it reaches the furthest forward plotted distance of the reciprocating push-poll rod  9 , as shown in  FIG. 6 . As the motor shaft  5  continues to rotate the direction of the reciprocating push-pull rod  9  is changed to the opposite or back direction, as shown in  FIG. 7 , until it reaches that point where once again the embedded cam groove track  7  is at its closest point to casing surface of motor  2 , as shown in  FIG. 8 . This cycle is continually repeated until t he on-off switch  28  is moved by the user to the off position. The short back and forth movement of brush head  10  aids the uses in the application of mascara to the desired eyelash, not shown. Optional weight  18 , as shown in  FIG. 2 . produces an off-centered rotation when motor shaft  5  rotates causing a vibration to occur that in some instance may aid the user in the application of mascara. 
         [0049]      FIG. 9  shows an first electric toothbrush assembly  30  which comprises a mobs  31  encased in a motor housing  32 . Motor housing  32  is embedded in housing  33 . The motor  31  includes motor shaft  34  or which cylindrical wheel  35  is attached. The cylindrical wheel  35  has an embedded cam groove track  36  in which a cam follower pin  37  is loosely seated, as shown in  FIG. 10 . The cam follower pin  37  is attached to a reciprocating push-pull rod  38 , as shown in  FIG. 10 . A portion of the reciprocating push-pull rod  38  is constrained by a portion of housing  33  thereby constraining the movement of the entire reciprocating push-pull rod  38 , as shown in  FIG. 9 . A flat circular stop limiter  39  is attached to the reciprocating push-pull rod  38 . Guide cod  40  is attached at the other end of reciprocating push-pull rod  38  to that to which the cam follower pin  37  is attached, as shown m  FIG. 15 . Guide rod  40  comprises a geared shaft  41  which simultaneously engages first semi gear wheel  42  and second semi gear wheel  43 . First semi gear wheel  42  and second semi gear wheel  43  is attached to first shaft  44  and second shaft  45  respectively, as shown in  FIG. 15 . Shaft  44  extends in opposite directions from its attachment to first semi gear wheel  42 , as shown in  FIG. 16 . First rotating anchor end  46  of shaft  44  test in extended housing base  47 . Opposite end  48  of shad  44  passes through the second shaft housing  73  of housing  33 , brush plate seal  49  and is attached to first semi brush plate  50 . First semi brush plate  50  is directly attached to first semi brush head  51 . Shaft  45  extends in opposite directions from its attachment to Second semi gear wheel  43 , as shown in  FIG. 17 . The second rotating anchor end  52 , of shaft  45 , rest in extended housing base  53 , as shown in FIG,  17 . Opposite end  54  of shaft  45  passes through the first shaft housing  72  of housing  33 , brush plate seal  49  and is attached to second send brash plate  55 . Second send brush plate  55  is directly attached to second semi brush head  56 . 
         [0050]    Guide rod  40  further comprises a second posh-pub rod  77 . Second posh-pull rod  77  is attached to the first free end of geared shaft  41 . Second push-pull rod  77  comprises a vertical passage housing  57 , as shown in  FIG. 15 . In  FIG. 17  vertical passage housing  57  is shown receiving one end of male guide rod  58  and is secured by first retaining end  59  and second retaining end  60  respectively while the opposite end  61  of male guide rod  58  passes through shaft housing  74  of housing  33 , bellows expansion seal  62  and is attached to brush plate  63 . Brush plate  63  is directly attached to brush bead  64 . Second push-pull rod  77  further comprises genie rod end  65 . Guide rod end  65 , as shown in  FIG. 15  rest within guide rod end housing  66  which includes internal air vent  67  and internal, air vent  68  respectively, as shoo a in  FIG. 15 . 
         [0051]    An first electric toothbrush assembly  36  further comprises upper outer shell  69 , as shown in  FIG. 18 . Upper outer shell  69  provides and first embedded platform  70  and second embedded platform  71 . First embedded platform  76  is shaped well enough to allow brush plate seal  49 , not shown, to snugly rest within its boundaries while establishing a border for first semi brush bead  51  and  56 , not shown. First embedded platform  70  further comprises first shaft housing  72  and second shaft housing  73 . Second embedded platform  71  in the shape of a rectangle is allows the bellows expansion seal  62 , not shown, to snugly rest within its boundaries while establishing a border for brush head  64 , not shown. Second embedded platform  71  further comprises a shaft housing  74  designed to permit male guide rod  58  to move about freely. In  FIG. 19  the directional arrows depict, the movement of the reciprocating push-pull rod  38 , first semi brush head  51 , second semi brush head  56  and brush head  64  when in operation. 
         [0052]    The motor  31  is driven by one or more batteries  75 , as shown in  FIG. 9 . Motor  31  may be powered by a battery pack, which may be of the lithium-ion type for ready charging via a secondary voltage coil and an integral male socket portion within housing  33 , not shown. Said male socket portion is detachably received in a corresponding female socket portion provided in a charger base assembly having a primary charging coil, also not shown. The electrical circuit would be defined with one side of the secondary coil attached to a negative battery terminal connector and the other side of the secondary coil coupled through a diode to the positive battery terminal. The diode rectifies voltage outputs from the coil, also not shown. Other prior art charging circuitry may be used. First electric toothbrush assembly  30  further comprises an end cap  78 , as shown in  FIG. 9 . End cap  78  enables easy replacement of one or more batteries  75 . Motor  31  is controlled by an on-off switch  76 . 
         [0053]    In operation, the riser starts the motor  31  by moving the on-off switch  76  to the on position. As the cylindrical wheel  35  that is monitored on motor shaft  34  is rotated by the motor  31 , the cam follower pin  37  follows the groove of the embedded cam groove track  36  to produce the desired back and forth motion of the reciprocating push-pull rod  38 . The shape of the embedded cam groove track  36  defines the distance that the reciprocating push-pull rod  38  and the attached guide rod  40  move back and forth. 
         [0054]    A partial progressive sequence of events illustrating one complete cycle of the reciprocating drive mechanism for a electric toothbrush assembly  30  of the type shows in  FIG. 9  is shown so  FIGS. 10 ,  11 ,  12 ,  13  and  14 . In FIGS,  10 ,  11 ,  12 ,  13  and  14  motor  31  is rotating motor shaft  34  counterclockwise. In  FIG. 10  the embedded cam groove track  36  is at its closest point to casing surface of motor  31 . As the motor shaft  34  rotates counterclockwise the earn follower pin  37  follows the groove of the embedded cam groove track  36  and causes the reciprocating push-pull rod  38  and the attached guide rod  40  to move forth, as shown in  FIG. 11  until it reaches the furthest forward plotted distance of the reciprocating push-pull rod  38  and the attached guide rod  40 , as shown in  FIG. 12 . As the motor shaft  34  continues to rotate the direction of the reciprocating push-pull rod  38  and the attached guide rod  40  is changed to the opposite or back direction, as shown in  FIG. 13 , until it reaches that point where once again the embedded cam groove track  36  is at its closest point to casing surface of motor  31 , as shown in  FIG. 14 . This cycle is continually repeated until the on-off switch  76  is moved by the user to the off position. The short back and forth movement of guide rod  40  engages first semi gear wheel  42  and  43  causing the movement of the first semi brush head  51 , second semi brush head  56  in the direction shown in  FIG. 19  while simultaneously pushing and pulling male guide rod  58  which ultimately moves brush head  64  in the direction shown in  FIG. 19 . 
         [0055]    In  FIG. 20  the second electric toothbrush assembly  80  comprises housing  81 . Housing  81  comprises handle portion  82 . Handle portion  82  comprises motor  83  encased in a motor housing  84 . Motor housing  84  is embedded in housing  85 . The motor  83  includes motor shaft  86  on which cylindrical wheel  87  is attached. The cylindrical wheel  87  has an embedded cam groove track  88  in which a cam follower pin  89  is loosely seated, as shown in  FIG. 22  The cam follower pin  89  is attached to a reciprocating push-pull rod  90 , as shown in  FIG. 22 . A portion of the reciprocating push-pull rod  90  is constrained by a portion of housing  85  thereby constraining the movement of the entire reciprocating push-pull rod  90 , as shown in  FIG. 20 . A flat circular stop limiter  91  is attached to the reciprocating push-pull rod  90 . Tapered male end  92  is attached at the other end of reciprocating push-pull rod  90  to that to which the cam follower pin  89  is attached, as shown in  FIG. 20 . 
         [0056]    Housing  81  further comprises a detachable brush head  93 , as shown in  FIGS. 20 ,  21  and  27 . Detachable brush head  93  comprises rod  94  having female end  95 , as shown in  FIG. 27 . At female end  95  of rod  94  is attached rod limber  96 . Rod limiter  96  and a portion of rod  94  are constrained by housing  97  thereby constraining the entire rod  94 . Guide rod  98  is attached at the other end of rod  94  to that to which the female end  95  is attached, as shown in  FIG. 27 . Guide rod  98  comprises a geared shaft  99  which simultaneously engages first semi gear wheel  100  and second semi gearwheel  101 . First semi gear wheel  100  and  101  is attached to first shaft  102  and second shaft  103  respectively, as shown in  FIG. 27 . First shaft  102  extends in opposite directions from its attachment to first semi gear wheel  100 , as shown in  FIG. 28 . First rotating anchor end  104  of first shaft  102  rest in extended housing base  105 . Opposite end  100  of first shaft  102  passes through the second shaft housing  133  of housing  97 , brush plate seat  107  and is attached to first semi brush plate  108 . First semi brush plate  108  is directly attached to first semi brush head  109 . Second shaft  103  extends in opposite directions from its attachment to Second semi gear wheel  101 , as shown in  FIG. 29 . The second rotating anchor end  110 , of second shaft  103 , rests in extended housing base  111 , as shown in  FIG. 29 . Opposite end  112  of second shaft  103  passes through the first shaft housing  132  of housing  97 , brush plate seal  107  and is attached to second semi brush plate  113 . Second semi brush plate  113  is directly attached to second semi brush head  114 . Guide rod  98  further comprises a second push-pull rod  141 . Second push-pull rod  141  is attached to the last free end of geared shaft  99 . Second push-pull rod  41  comprises a vertical passage housing  115 , as shown in  FIG. 27 . In  FIG. 29  vertical passage housing  115  is shown receiving one end of male guide rod  116  and is secured by first retaining end  117  and second retaining end  118  respectively while the opposite end  119  of male guide rod  119  passes through shaft housing  134  of housing  97 , bellows expansion seal  120  and is attached to brush plate  121 . Brush plate  121  is directly attached to brush bead  122 . Second push-pull rod  141  further comprises guide rod end  123 . Guide rod end  123 , as shown in  FIG. 27  rest within guide rod end housing  124  which includes internal air vent  125  and internal air vent  126  respectively, as shown in  FIG. 27 . Guide rod end  123  is in continual contact with one side of movable plate  127  at all times due to the pressure exerted by spring  128  on the opposite side of movable plate  127 . Movable plate is retained within guide reel end housing  124 , as shown in  FIG. 27 . 
         [0057]    A detachable brush head  95  further comprises upper carter shell  129 , as shown in  FIG. 30 . Upper outer shell  129  provides and first embedded platform  130  and second embedded platform  131  first embedded platform  130  is shaped well enough to allow brush plate seal  107 , not shown, to snugly rest within its boundaries while establishing a border for first semi brush head  169  and see end send brush head  114 , not shown. First embedded platform  130  further comprises first shaft housing  132  and second shaft housing  133 . Second embedded platform  131  in the shape of a rectangle is allows the bellows expansion seal  120 , not shown, to snugly rest within its boundaries while establishing a border for brush head  122 , not shown. Second embedded platform  131  further comprises a shaft housing  134  designed to permit male guide rod  116  to move about freely. In  FIG. 31  the directional arrows depict the movement of the reciprocating push-pull rod  90 , rod  94 , first semi brush head  109 , second semi brush head  114  and brush head  122  when in operation. The detachable brush head  93  is held in place by retaining clip end  135  and  136  are engaged with retaining clip anchor  137  and  138  respectively as shown in  FIGS. 21 and 31 . 
         [0058]    The motor  83  is driven by one or more batteries  139 , as shown in  FIG. 20 . Motor  83  may be powered by a battery pack, which may he of the lithium-ion type for ready charging via a secondary voltage coil and an integral male socket portion within housing  35 , not shown. Said male socket portion is detachably received in a corresponding female socket portion provided in a charger base assembly having a primary charging coil, also not shown. The electrical circuit would be defined with one side of the secondary coil attached to a negative battery terminal connector and the other side of the secondary coil coupled through a diode to the positive battery terminal. The diode rectifies voltage outputs from the coil, also not shown. Other prior art charging circuitry may be used. Second electric toothbrush assembly  80  further comprises an end cap  142 , as shown in  FIG. 21 . End cap  142  enables easy replacement of one or more batteries  139 . Motor  83  is controlled by an on-off switch  140 . 
         [0059]    In operation, the user starts the motor  83  by moving the on-off switch  140  to the on position. As the cylindrical wheel  37  that is mounted on motor shaft  86  is rotated by the motor  83 , the cam follower pin  89  follows the groove of the embedded cam groove track  83  to produce the desired back and forth motion of the reciprocating push-pull rod  90 . The shape of the embedded cam groove track  88  defines the distance that the reciprocating push-pull rod  90  moves back and forth. The tapered male oval  92  of reciprocating push-pull rod  40  is firmly pressed against female end  95  of rod  94  and as the reciprocating push-pull rod  90  moves back and forth so does rod  94  and the attached guide rod  98 . Guide rod end  123  pushes movable plate  127  forth compressing spring  128 . Compressed spring  128  continually pushes movable plate  127  against guide rod end  123  and eliminates any backlash. 
         [0060]    A partial progressive sequence of events illustrating one complete cycle of the reciprocating drive mechanism for a second electric toothbrush assembly  80  of the type shown in  FIG. 20  is shown in  FIGS. 22 ,  23 ,  24 ,  25  and  26 . In  FIGS. 22 ,  23 ,  24 ,  25  and  26  motor  83  is rotating motor shaft  86  counterclockwise. In  FIG. 22  the embedded cam groove track  88  is at its closest point to casing surface of motor  83 . As the motor shaft  86  rotates counterclockwise the cam follower pin  89  follows the groove of the embedded cam groove track  88  and causes the reciprocating push-pull rod  90  and the attached guide rod  98  to move forth, as shown in  FIG. 23  until it reaches the furthest forward plotted distance of the reciprocating push-pull rod  90  and the attached guide rod  98 , as shown in  FIG. 24  As the motor shaft  86  continues to rotate the direction of the reciprocating push-poll rod  90  and the attached guide rod  98  is changed to the opposite or back direction, as shown in  FIG. 25 , until it reaches that point where once again the embedded cam groove track  88  is at its closest point to casing surface of motor  83 , as shown in  FIG. 26 . This cycle is continually repeated until the on-off switch  140  is moved by the user to the off position. The short back and forth movement of guide rod  98  engages first semi gear wheel  100  and  101  causing the movement of the first semi brush head  109 , second semi brush head  114  in the direction shown in  FIG. 31  while simultaneously pushing and pulling male guide rod  110  which ultimately moves brush head  122  in the direction shown in  FIG. 31 . 
         [0061]    While the present invention has been described and illustrated above in the content of an electric mascara applicator assembly and a reciprocating drive mechanism: and in the contest of an first electric toothbrush assembly and a reciprocating drive mechanism, and in the contest of an second electric toothbrush assembly and a reciprocating drive mechanism it is not to be considered limited to either of these assemblies. It is to be understood that other embodiments maybe used or modifications and additions may be made to the described embodiments for performing the same function of the present invention without deviating therefrom. Therefore, the present invention should be construed in breadth and scope in accordance with the recitation of the appended claims. 
       Mascara Applicator Assembly Numbering Chart 
       [0000]    
       
         mascara applicator assembly  1   
         motor  2   
         motor housing  3   
         housing  4   
         motor shaft  5   
         cylindrical wheel  6   
         embedded cam groove track  7   
         cam follower pin  8   
         reciprocating push-pull rod  9   
         Brush head  10   
         circular stop limiter  11   
         bellows expansion seal seat  12   
         outer bottom housing  13   
         bellows expansion seal seat  14   
         bellows expansion seal  15   
         Air vent  16   
         tube  17   
         optional weight  18   
         Batteries  19   
         battery compartment  20   
         Removable negative battery contact  21   
         end cap  22   
         Batteries  23   
         battery compartment  24   
         Removable positive and negative battery contact  25   
         cosmetic tank  26   
         trimmer  27   
         on-off switch  26   
       
     
       First Electric Toothbrush Assembly Numering Chart  
       [0000]    
       
         first electric toothbrush assembly  30   
         motor  31   
         motor housing  32   
         housing  33   
         motor shaft  34   
         cylindrical wheel  35   
         embedded cam groove track  36   
         cam follower pin  37   
         reciprocating push-pull rod  38   
         flat circular stop limiter  39   
         Guide rod  40   
         geared shaft  41   
         first semi gear wheel  42   
         second semi gear wheel  43   
         first shaft  44  and second shaft  45   
         First rotating anchor end  46   
         extended housing base  47   
         Opposite end  48   
         brush plate seal  49   
         first semi brush plate  50   
         first semi brush head  51   
         Second rotating anchor end  52   
         extended housing base  53   
         Opposite end  54   
         second semi brush plate  55   
         second semi brush head  56   
         vertical passage housing  57   
         male guide rod  58   
         first retaining cam  59  second retaining end  60   
         opposite end  61   
         bellows expansion seal  62   
         brush plate  63   
         brush head  64   
         Guide rod end  65   
         guide rod end housing  66   
         internal air vent  67  and internal air vent  63   
         upper outer shell  67   
         first embedded platform  70  and second embedded platform  71   
         first shaft housing  72  and second shaft housing  73   
         shaft housing  74   
         batteries  75   
         on-off switch  76   
         second push-pull rod  77   
         end cap  78   
       
     
       Second Electric Toothbrush Assembly Numbering Chart 
       [0000]    
       
         second electric toothbrush assembly  80   
         housing  81   
         comprises handle portion  82   
         motor  83   
         motor housing  84   
         housing  85   
         motor shaft  86   
         cylindrical wheel  87   
         embedded cam groove track  88   
         cam follower pin  89   
         reciprocating push-pull rod  90   
         flat circular stop limiter  91   
         tapered male end  92   
         detachable brush head  93   
         rod  94   
         female end  95   
         rod limiter  96   
         housing  97   
         Guide rod  98   
         geared shaft  99   
         first semi gear wheel  100   
         second semi gear wheel  101   
         first shaft  102  and second shaft  103   
         First rotating anchor end  104   
         extended housing base  105   
         Opposite end  106   
         brush plate seal  107   
         first semi brush plate  108   
         first semi brush head  109   
         Second rotating anchor end  110   
         extended housing base  111   
         Opposite end  112   
         Second semi brush plate  113   
         second semi brush head  114   
         vertical passage housing  115   
         male guide rod  116   
         first retaining end  117  and second retaining end  118   
         Opposite end  119   
         bellows expansion seal  120   
         brush plate  121   
         brush head  122   
         Guide rod end  123   
         guide rod end housing  124   
         internal air vent  123  and internal air vent  126   
         movable plate  127   
         spring  128   
         upper outer shell  129   
         first embedded platform  130  and second embedded platform  131   
         first shaft housing  132  and second shaft housing  133   
         shaft housing  134   
         retaining clip end  135  and  136   
         retaining clip anchor  137  and  138   
         batteries  139   
         on-off switch  140   
         second push-pull rod  141   
         end cap  142