Abstract:
A left and right movable massage device comprises: a first outer housing, a first inner housing, a motor, a left-and-right moving gear assembly, a second outer housing, a second inner housing and a massage assembly. The main driven gear is disposed on the first inner housing and rotated by the motor, and the guiding pin is restricted in the direction restricting groove of the first inner housing, so that the rotation of the main driven gear is converted into linear motions in two directions to make the first inner housing movable in the left-and-right direction. With a single motor, different massage movements can be performed to meet different users&#39; requirements.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a massage device, and more particularly to a left and right movable massage device. 
         [0003]    2. Description of the Prior Art 
         [0004]    Today, people are living under great pressure and therefore need to release stress by using some massage devices. Normally, massage devices are provided with massage heads to carry out massage operation by ways of rotation, kneading or up and down movement. However, the conventional massage ways of rotating, kneading or movement might not be able to satisfy the demands of different users. Furthermore, the structure for moving the massage heads should normally be used in combination with guiding rails in such a manner that the massage heads are provided with guiding members, and a drive member drives the massage heads to rotate, so as to make the guiding members move along the rail. It is clear that the rotation of the massage heads cause the displacement of the same. However, such arrangements would restrict the action of massage or displacement. 
         [0005]    The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
       SUMMARY OF THE INVENTION 
       [0006]    The primary object of the present invention is to provide a left and right movable massage device which is capable of performing different massage movements. 
         [0007]    To achieve the above object, a left and right movable massage device in accordance with the present invention comprises: a first outer housing, a first inner housing, a motor, a left-and-right moving gear assembly, a second outer housing, a second inner housing and a massage assembly. 
         [0008]    The first outer housing includes a guiding portion extending in a left-and-right direction, and a direction perpendicular to the left-and-right direction is defined as a perpendicular direction, the first outer housing is further formed with a direction restricting groove extending in the perpendicular direction. 
         [0009]    The first inner housing is formed at a bottom thereof with a guiding groove extending in the left-and-right direction, and the guiding portion is inserted in the guiding groove so as to make the first inner housing movable in the left-and-right direction. 
         [0010]    The motor is fixed to the first inner housing and provided with at least one drive screw. 
         [0011]    The left-and-right moving gear assembly includes a main driven gear pivotally disposed on the first inner housing in such a manner that the main driven gear is rotated by the motor, at a bottom of the main driven gear is eccentrically disposed a guiding pin which extends out of the first inner housing and into the direction restricting groove of the first outer housing. 
         [0012]    The second inner housing is assembled to the first inner housing. 
         [0013]    The second outer housing is assembled to the first outer housing and formed with a hole for accommodation of the second inner housing. 
         [0014]    The massage assembly includes a massage head and disposed on the second inner housing. 
         [0015]    The main driven gear is disposed on the first inner housing and rotated by the motor, and the guiding pin is restricted in the direction restricting groove of the first inner housing, so that the rotation of the main driven gear is converted into linear motions in two directions to make the first inner housing movable in the left-and-right direction. With a single motor, different massage movements can be performed to meet different users&#39; requirements. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is an exploded view of a left and right movable massage device in accordance with the present invention; 
           [0017]      FIG. 2  is an assembly view of a part of the left and right movable massage device in accordance with the present invention; 
           [0018]      FIG. 3  is an assembly view of another part of the left and right movable massage device in accordance with the present invention; 
           [0019]      FIG. 4  is a cross sectional view of a part of the left and right movable massage device in accordance with the present invention; 
           [0020]      FIG. 5  is a cross sectional view of another part of the left and right movable massage device in accordance with the present invention; and 
           [0021]      FIG. 6  is another cross sectional view of another part of the left and right movable massage device in accordance with the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0022]    The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
         [0023]    Referring to  FIGS. 1-6 , a left and right movable massage device in accordance with the present invention comprises: a first outer housing  10 , a first inner housing  20 , a motor  30 , two drive gear assemblies  40 , a left-and-right moving gear assembly  50 , two stroking assemblies  60 , a second inner housing  70 , a second outer housing  80 , and two massage assemblies  90 . 
         [0024]    The first outer housing  10  includes two guiding portions  11 , one of the guiding portions  11  extends in a left-and-right direction X, and the other guiding portion  11  extends in a perpendicular direction Y which is perpendicular to the left-and-right direction X. The first outer housing  10  is further formed with a direction restricting groove  12  extending in the perpendicular direction Y. 
         [0025]    The first inner housing  20  is formed at the bottom thereof with two guiding grooves  21  extending in the left-and-right direction X, and the guiding portions  11  are inserted in the guiding grooves  21  so as to make the first inner housing  20  movable in the left-and-right direction X. 
         [0026]    The motor  30  is fixed to the first inner housing  20  and provided with two drive screws  31  which are disposed at two ends of the motor  30  and extend in the left-and-right direction X. 
         [0027]    The drive gear assemblies  40  each include a first stage drive gear  41 , a second stage drive gear  42  and a medium gear  43  which are pivotally disposed on the first inner housing  20  in such a manner that the first and second stage drive gears  41 ,  42  are concentrically superposed with each other, the first stage drive gear  41  is engaged with the drive screws  31  of the motor  30 , and the second stage drive gear  42  is engaged with the medium gear  43 . The first and second stage drive gears  41 ,  42  are different in number of teeth, and the medium gear  43  is provided with a plurality of beveled teeth  431 . 
         [0028]    The left-and-right moving gear assembly  50  is engaged with one of the two drive gear assemblies  40  and includes a first stage driven gear  51 , a unidirectional bearing  52 , a second stage driven gear  53  and a main driven gear  54  which are pivotally disposed on the first inner housing  20  in such a manner that the first stage driven gear  51  is engaged with the medium gear  43 , the second stage driven gear  53  is sleeved on the unidirectional bearing  52  and superposed and concentric with the first stage driven gear  51 , and the second stage driven gear  53  is engaged with the main driven gear  54 . At the bottom of the main driven gear  54  is eccentrically disposed a guiding pin  541  which extends out of the first inner housing  20  and into the direction restricting groove  12  of the first outer housing  10 . 
         [0029]    Each of the stroking assemblies  60  includes a rotation stop shaft  61  and a push disc  62 . The rotation stop shaft  61  and the medium gear  43  are concentrically disposed in the first inner housing  20 . The push disc  62  is formed at the bottom thereof with a plurality of beveled toothed portions  621 . The push disc  62  is sleeved on the rotation stop shaft  61 , the beveled toothed portions  621  of the push disc  62  are engaged with the beveled teeth  431  of the medium gear  43  to form a ratchet structure. 
         [0030]    The second inner housing  70  is assembled to the first inner housing  20  and provided with two holes  71  allowing for passage of the push discs  62  of the stroking assemblies  60 . On the second inner housing  70  are formed two protrusions  72 . 
         [0031]    The second outer housing  80  is assembled to the first outer housing  10  and formed with a hole  81  for accommodation of the second inner housing  70 . 
         [0032]    The two massage assemblies  90  each include an oscillating rod  91 , a connecting block  92 , a travel restricting block  93 , two light emitting circuit boards  94  and two massage heads  95 . 
         [0033]    The connecting block  92  and the travel restricting block  93  are received in two ends of the oscillating rods  91 , respectively. The connecting block  92  is eccentrically connected to the push disc  62 , and the travel restricting block  93  is sleeved on the protrusions  72  of the second inner housing  70 . 
         [0034]    The light emitting circuit boards  94  are fixed at both ends of the oscillating rod  91 . 
         [0035]    The two massage heads  95  are disposed on and cover the light emitting circuit boards  94  and exposed out of the hole  81  of the second outer housing  80 . 
         [0036]    When the motor  30  is powered on, the drive screws  31  at both ends of the motor  30  rotate the first stage drive gears  41  of the drive gear assemblies  40 , then the first stage drive gears  41  rotate synchronously together with the second stage drive gears  42 , then the second stage drive gears  42  rotate the first stage driven gear  51 , the first stage driven gear  51  rotate together with the second stage driven gear  53  to drive the main driven gear  54  to rotate. 
         [0037]    At this moment, the rotation of the main driven gear  54  will make the first inner housing  20  move in the left-and-right direction X and cause the guiding pin  541  of the main driven gear  54  to move linearly in the perpendicular direction Y due to the fact that the guiding pin  541  of the main driven gear  54  is received in the direction restricting groove  12  of the first outer housing  10 , the main driven gear  54  is rotatably restricted in the first inner housing  20 , and the first inner housing  20  is restricted by the guiding grooves  21  of the first outer housing  10  and consequently only movable in the left-and-right direction X. Therefore, when the main driven gear  54  keeps rotating, the first inner housing  20  will be caused to move in the left-and-right direction X. 
         [0038]    When the motor  30  drives the left-and-right moving gear assembly  50  to move, the medium gears  43  also rotate, the beveled teeth  431  of the medium gears  43  will be engaged with the beveled toothed portions  621  of the push discs  62  in one direction so as to rotate the push discs  62 , and when in opposite direction, the beveled teeth  431  of the medium gears  43  will be disengaged from and rotate idly with respect to the beveled toothed portions  621  of the push discs  62 . For example, when the medium gears  43  rotate in a clockwise direction, the beveled teeth  431  of the medium gears  43  are disengaged from the beveled toothed portions  621  of the push discs  62 , the rotation of the medium gears  43  will cause the beveled teeth  431  to rotate with respect to the beveled toothed portions  621  of the push discs  62 . When the medium gears  43  keep rotating, it will cause the cyclic motion of the beveled teeth  431  of the medium gears  43  that will gradually engage with and disengage from the beveled toothed portions  621  of the push discs  62 , resulting in repeated up and down movement of the push discs  62 . Meanwhile, the massage assemblies  90  fixed to the push discs  62  also move up and down to perform massage operation. 
         [0039]    When rotating in a counterclockwise direction, the medium gears  43  can be engaged with the beveled toothed portions  621  to rotate the push discs  62 . At this moment, one end of the oscillating rods  91  of the massage assemblies  90  fixed to the push discs  62  is caused to move together with the push discs  62 , and another end of the oscillating rods  91  will be caused to oscillate since it is restricted by the two protrusions  72  of the second inner housing  70  and the travel restricting blocks  93 . Consequently, the massage assemblies  90  are caused to oscillate to carry out oscillating massage action. 
         [0040]    On the other hand, the light emitting circuit boards  94  are disposed in the massage heads  95 , so that light will be produced, accompanied by heat, during massage operation, and the heat produced can provide a heating effect during massage. 
         [0041]    It is understood that when the motor  30  keeps rotating, the first inner housing  20  will drive all the components disposed on the first inner housing  20  to move in the left-and-right direction X, and the massage assemblies  90  can carry out the kneading or stroking massage in the forms of up and down movement or continuous oscillation, so as to meet different user&#39;s demands. 
         [0042]    The present invention is simply structure since it can carry out the different massage modes by only using a motor and a plurality of gears. Furthermore, the arrangement of the two-stage gears can reduce the size of the massage device. 
         [0043]    While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments be made without departing from the scope of the present invention.