Abstract:
A moisture-proof spotlight includes a lamp housing, a support pivotally supporting the lamp housing from below and a lamp assembly pivotally installed inside the lamp housing, wherein the lamp housing contains therein a moisture-proof partition set provided for a vertical driving device and a horizontal driving device to affix thereto and also together installed inside the lamp housing for moisture-proof, thereby the defect of a conventional spotlight due to its horizontal driving device installed in the support tended to be affected by moisture is capably eliminated.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Present Invention 
         [0002]    The present invention relates to spotlights, and more particularly to a moisture-proof spotlight that is invulnerable to moisture. 
         [0003]    2. Description of Related Art 
         [0004]    Referring to  FIG. 1 , a conventional spotlight  90  is a lamp capable of changing its lighting direction vertically and horizontally. The spotlight  90  comprises a lamp housing  91  and a support  92  pivotally supporting the lamp housing  91  from below. 
         [0005]    In the lamp housing  91 , a partition  94  divides the interior of the lamp housing  91  into a lamp compartment  91   a  and a driving-device compartment  91   b.    
         [0006]    A lamp assembly  95  is pivotally installed in the lamp compartment  91   a.  A vertical driving device  96  is installed in the driving-device compartment  91   b  and affixed to the middle partition  94 . A horizontal driving device  97  is fixedly installed inside the support  92 . 
         [0007]    A curved rack  95   a  is provided behind the lamp assembly  95 , for the vertical driving device  96  to engage and move the lamp assembly  95 . In response to the driving force from the vertical driving device  96 , the lamp assembly  95  tilts up and down in the lamp compartment  91   a  of the lamp housing  91 , so as to provide a vertically changeable lighting angle. 
         [0008]    A ring gear  91   c  is provided below the lamp housing  91 , for the horizontal driving device  97  to engage and move the lamp assembly  95 . In response to the driving force from the horizontal driving device  97 , the lamp housing  91 , together with the lamp assembly  95  installed in its lamp compartment  91   a,  swivels right and left against the support  92 , so as to provide a horizontally changeable lighting angle. 
         [0009]    However, the conventional spotlight  90  is structurally defective because the horizontal driving device  97  is fixed inside the support  92 . In damp weather conditions, once rainwater permeate into the support  92  of the spotlight  90 , the horizontal driving device  97  tends to get damaged by moisture. 
       SUMMARY OF THE INVENTION 
       [0010]    In view of this, the primary objective of the present invention is to provide a moisture-proof spotlight, which improves the prior-art device by making its vertical and horizontal driving devices both installed in its lamp housing instead of the support, so that the driving devices are secured from moisture and in turn the whole spotlight is durable even in damp weather conditions. 
         [0011]    The moisture-proof spotlight comprises a lamp housing, a support pivotally supporting the lamp housing from below, and a lamp assembly pivotally installed inside the lamp housing. The lamp housing contains therein a moisture-proof partition set, a vertical driving device, a horizontal driving device and a stationary gear. 
         [0012]    The moisture-proof partition set includes a vertical partition and a horizontal partition. The vertical partition divides the interior of the lamp housing into a lamp compartment and a driving-device compartment, and the lamp assembly is pivotally installed in the lamp compartment of the lamp housing. The horizontal partition forms a floor of the driving-device compartment of the lamp housing. 
         [0013]    The stationary gear is located below the horizontal partition of the moisture-proof partition set, and combined with the support as an integrated structure through a fixing member. 
         [0014]    The vertical driving device is fixed to the vertical partition of the moisture-proof partition set, and drives the lamp assembly to tilt up and down in the lamp compartment of the lamp housing, so as to change the illuminating angle of the moisture-proof spotlight vertically. 
         [0015]    The horizontal driving device is fixed to the horizontal partition, and drives the lamp housing and the lamp assembly to swivel right and left against the support, so as to change the illuminating angle of the moisture-proof spotlight horizontally. 
         [0016]    The lamp housing of the moisture-proof spotlight is preferably composed of an upper half and a lower half. 
         [0017]    As a preferred embodiment, the upper half of the lamp housing has a first slot and the lower half of the lamp housing has a second slot, in which the vertical partition has laterals thereof inlaid to and retrained by the first slot and the second slot, so that the driving-device compartment in the lamp housing is less affected by moisture in damp weather conditions. 
         [0018]    In the disclosed moisture-proof spotlight, the vertical driving device and the horizontal driving device are both installed in the driving-device compartment of the lamp housing, and are secured from moisture, so the whole spotlight is advantageously durable. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]      FIG. 1  is a cross-sectional view of a conventional spotlight. 
           [0020]      FIG. 2  provides a perspective view and a cutaway view of a moisture-proof spotlight according to the present invention. 
           [0021]      FIG. 3  shows the moisture-proof spotlight of  FIG. 2  with its upper half lifted. 
           [0022]      FIG. 4  depicts components of the moisture-proof spotlight that are installed in its lamp housing. 
           [0023]      FIG. 5  is a partially exploded view of the moisture-proof spotlight with the upper half removed. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0024]    Referring to  FIG. 2 , the disclosed moisture-proof spotlight  10  is a versatile spotlight with its illumination changeable vertically and horizontally. The moisture-proof spotlight  10  comprises a lamp housing  20 , a support  30  pivotally supporting the lamp housing  20  from below, and a lamp assembly  40  pivotally installed inside the lamp housing  20 . 
         [0025]    As shown in  FIG. 2  through  FIG. 5 , the lamp housing  20  is composed of an upper half  21  and a lower half  22 , and contains therein a lamp assembly  40 , a moisture-proof partition set  50 , a vertical driving device  60 , a horizontal driving device  70  and a stationary gear  80 . 
         [0026]    The upper half  21  of the lamp housing  20  is provided with a first slot  23 , and the lower half  22  of the lamp housing  20  is provided with a second slot  24  which is positional corresponding to the first slot  23  of the upper half  21 . The lower half  22  of the lamp housing  20  is further provided with a through hole  28  and a plurality of fixing ribs  29 . 
         [0027]    The moisture-proof partition set  50  comprises a vertical partition  51  and a horizontal partition  52 . When assembled, the vertical partition  51  has its four edges inlaid into and retained by the first slot  23  and the second slot  24  formed in the lamp housing  20 , so that the interior of the lamp housing  20  is divided into a lamp compartment  25   a  and a driving-device compartment  25   b.  Particularly, the lamp assembly  40  is pivotally installed in the lamp compartment  25   a  of the lamp housing  20 . 
         [0028]    The horizontal partition  52  of the moisture-proof partition set  50  has a plurality of locking holes  53  that are positional corresponding to the fixing ribs  29  at the lower half  22  of the lamp housing  20 . When assembled, the horizontal partition  52  is fixed to the lower half  22  of the lamp housing  20  by fixing members, while a sufficient space is left below the horizontal partition  52  for receiving the stationary gear  80 . This configuration, as defined herein, refers to that the horizontal partition  52 , when assembled, forms a floor of the driving-device compartment  25   b  of the lamp housing  20 . 
         [0029]    The driving-device compartment  25   b  of the lamp housing  20  is sealed by the vertical partition  51  and the horizontal partition  52  of the moisture-proof partition set  50  and obtains excellent moisture-proof effect. 
         [0030]    The vertical driving device  60  comprises a reversible motor  61  and a pinion  62 . The vertical driving device  60  is fixed to the vertical partition  51  of the moisture-proof partition set  50 , and is received in the driving-device compartment  25   b  of the lamp housing  20 . 
         [0031]    The horizontal driving device  70  comprises a reversible motor  71  and a pinion  72 . The horizontal driving device  70  is fixed to the horizontal partition  52  of the moisture-proof partition set  50 , and is received in the driving-device compartment  25   b  of the lamp housing  20 . 
         [0032]    The lamp assembly  40  has each of its two laterals provided with a pivot  41 , while a recessed rack  42  extends along a back of the lamp assembly  40 . 
         [0033]    For pivotally installing the lamp assembly  40  into the lamp compartment  25   a  of the lamp housing  20 , the upper half  21  of the lamp housing  20  has upper pivot seats  26  for pivotally supporting the pivots  41  of the lamp assembly  40  jointly with lower pivot seats  27  provided correspondingly at the lower half  22  of the lamp housing  20 . When the upper half  21  and the lower half  22  of the lamp housing  20  are combined, the upper pivot seats  26  of the upper half  21  and the lower pivot seats  27  of the lower half  22  jointly form two pivot seats that allow the pivots  41  of the lamp assembly  40  to be pivotally installed therein. 
         [0034]    When the lamp assembly  40  is pivotally installed in the lamp compartment  25   a  of the lamp housing  20 , the vertical driving device  60  is fixed to the vertical partition  51  of the moisture-proof partition set  50 , and has its pinion  62  engaged with the recessed rack  42  of the lamp assembly  40 . In response to the driving force coming from the vertical driving device  60  through the pinion  62 , the lamp assembly  40  tilts up and down in the lamp compartment  25   a  of the lamp housing  20 , so as to change its illuminating angle vertically. 
         [0035]    The stationary gear  80  has a plurality of locking holes  81 . The support  30  has a raised ring  31  that is provided with a plurality of fixing ribs  32  at its inner periphery. The fixing ribs  32  are positional corresponding to the locking holes  81  of the stationary gear  80 , so that fixing member can pass through the locking holes  81  and fix the stationary gear  80  to the raised ring  31 , making the stationary gear  80  combine with the support  30  as an integrated structure. 
         [0036]    Referring to  FIG. 2  through  FIG. 5 , during assembly, the raised ring  31  of the support  30  has its top pass through the through hole  28  of the lower half  22  of the lamp housing  20  and partially exposed outside the lower half  22  for the stationary gear  80  to affix. 
         [0037]    When the horizontal partition  52  of the moisture-proof partition set  50  forms the floor of the driving-device compartment  25   b  of the lamp housing  20 , the stationary gear  80  is located below the horizontal partition  52  of the moisture-proof partition set  50 . The horizontal driving device  70  is fixed to the horizontal partition  52  of the moisture-proof partition set  50 , and has its pinion  72  engaged with the stationary gear  80 . In response to the driving force coming from the horizontal driving device  70  through the pinion  72 , the lamp housing  20 , together with the lamp assembly  40  installed in its lamp compartment  25   a,  swivels right and left against the support  30 , so as to change its illuminating angle horizontally. 
         [0038]    To sum up, the disclosed moisture-proof spotlight  10  features that the vertical driving device  60  and the horizontal driving device  70  are both installed inside the driving-device compartment  25   b  of the lamp housing  20 , so that the driving devices are secured from moisture and in turn the whole spotlight is durable even in damp weather conditions.