Abstract:
The present invention discloses a waterproof lampshade structure capable of automatically discharging any rainwater that enters into the lampshade as to prevent any possible affection to the related circuits of a lamp as well as dispersing the heat produced by a light bulb from the inside of the lampshade to the outside as to effectively lower the temperature of the lampshade and greatly improve the life of the light bulb and related components and circuits.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to a lampshade structure, more particularly to a waterproof lampshade structure capable of automatically discharging water and dispersing heat from the inside of the lampshade to the outside.  
       BACKGROUND OF THE INVENTION  
       [0002]     In recent years, the pace of our life and work is extremely fast due to the severe competitions of the society, and thus people give more weights to leisure activities to release their living and working pressures during holidays or leisure time. Among various leisure activities, barbeque is the most popular one which is suitable for the participation of the whole family, relatives and friends. Particularly with the spacious backyards in European or American families, barbeque has become the most popular leisure-time social activity. Therefore, the European or American families take barbeque stoves and accessories required for the barbeque activity very seriously.  
         [0003]     In  FIG. 1 , a traditional rotisserie  60  comes with a hollow barbeque grill  61  with a U-shape cross section, and the barbeque grill  61  comprises: an accommodating space  611  therein for accommodating the related barbeque accessories such as a stove, a grate and charcoals (not shown in the figure); a first fixed stand  62  and a second fixed stand  63  being disposed on both opposite sidewalls of the barbeque grill  61  respectively; a motor module  64  being installed on the second fixed stand  63 ; an axle hole  642  being disposed on a lateral side of the motor module  64 ; a rod  70  being inserted into the axle hole  642 ; a notch  624  being disposed at the first fixed stand  62  on the other end of the rod  70 , a pair of brochette forks  651  is disposed on an appropriate position of the rod  70 , such that after a barbeque food item  80  is fixed onto the rod  70  and the brochette fork  651 , the barbeque food item  80  is rotated on the rod  70  by the motor module  64  and cooked by the charcoals in the barbeque grill  61 . The motor module  64  connects to a power supply through a power cable  643  and supplies the electric power required for the normal operation of a motor (not shown in the figure).  
         [0004]     If the foregoing rotisserie  60  is used for barbequing food in daytime while there are bright light and clear visibility, users can visually check whether or not the barbeque food item  80  is cooked, but if the barbeque activity is held at nighttime while it is dark or having a poor visibility, then users cannot visually check whether or not a barbeque food item  80  is cooked. Therefore, users usually have to slide and taste a small piece of the barbeque food item  80  to determine the appropriate cooked level of the barbeque food item  80 . If a user eats some of the uncooked barbeque food item  80 , the user may get sick easily by swallowing the germs that remain in the uncooked food and may jeopardize our health.  
         [0005]     In view of the foregoing shortcomings, some barbeque grill manufacturers design a barbeque grill that comes with a lamp, so that users can see and determine the cooked level of the barbeque food item  80  easily in a dark environment with a poor visibility. However, most of the barbeque grills are placed in the backyard of an American of European family, or the barbeque activity is generally held outdoors in an open space, and thus a way of preventing rainwater from entering into the electric circuit in a lampshade should be taken into consideration for the design of a lamp to be used outdoors. In the meantime, the design should be able to disperse the heat produced by a light bulb to the outside for prevent accidents caused by an overheated lampshade.  
       SUMMARY OF THE INVENTION  
       [0006]     In view of the shortcomings of the foregoing traditional barbeque including a lamp that is not waterproof and unable to disperse heat effectively, the inventor of the present invention based on years of experience in the related industry to conduct extensive researches and experiments to overcome the shortcomings of the prior art and finally invented a waterproof lampshade structure in accordance with the present invention.  
         [0007]     Therefore, it is a primary objective of the present invention to provide a waterproof lampshade structure capable of automatically discharging any rainwater that enters into the lampshade as to prevent a possible affection to the related circuits and dispersing the heat produced by a light bulb from the inside of the lampshade to the outside as to effectively lower the temperature inside the lampshade and greatly improve the life of the light bulb and the related components and circuits.  
         [0008]     Another objective of the present invention is to provide a waterproof lampshade structure comprising an inner shade and an outer shade, wherein the outer shade is disposed on the external periphery of the inner shade and keeps an appropriate interval from each other; a light bulb and a lamp holder are accommodated at the internal edge of the inner shade, and the lamp holder can fix a close end of the inner and outer shades onto a support rod; a transparent lid is provided for waterproofing another open end of the inner and outer shades; a plurality of protrusions is protruded from the outer shade, each protrusion having a weephole disposed on one side of the transparent lid for discharging any rainwater that falls into the space between the inner shade and the outer shade; and the inner shade has a plurality of bulges, each bulge being conical in shape and having a ventilation hole disposed at its top for discharging the heat produced by the light bulb to the space between the inner shade and the outer shade and then to the outside through the weepholes disposed on the protrusions.  
         [0009]     A further objective of the present invention is to provide a waterproof lampshade structure comprising an outer shade that waterproofs an external edge of an inner shade and having an appropriate interval between the outer and inner shades, and the lower edge of a weephole on the outer shade presses against the external edge of the inner shade as to secure and couple the close end of the inner and outer shades integrally onto a support rod. The gap between the inner and outer shades corresponding to the bulges and the protrusions is partitioned into an independent space for discharging water and dispersing heat, and an open end of the inner shade is waterproofed by a transparent lid.  
         [0010]     Another further objective of the present invention is to provide a waterproof lampshade structure, wherein the external edge of the inner shade presses against the lower edge of each weephole disposed on the internal edge of the outer shade; an appropriate interval is kept between the inner and outer shades; the close end of the inner and outer shades is secured onto a support rod, such that when the inner and outer shades are integrally coupled, an interval between the inner and outer shades corresponding to the bulges and protrusions is partitioned into an independent space for discharging water and dispersing heat, and the open end of the outer shade is waterproofed by a transparent lid.  
         [0011]     The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]      FIG. 1  is a schematic view of the structure of a prior-art rotisserie;  
         [0013]      FIG. 2  is a sectional view of a first preferred embodiment of the invention;  
         [0014]      FIG. 3  is an enlarged view of a part of  FIG. 2 ;  
         [0015]      FIG. 4  is a sectional view of a second preferred embodiment of the invention; and  
         [0016]      FIG. 5  is a sectional view of a third preferred embodiment of the invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0017]     Please refer to  FIG. 2  for a preferred embodiment of the present invention. In  FIG. 2 , a waterproof lampshade structure  20  comprises an inner shade  221  and an outer shade  211 ; wherein the outer shade  211  is disposed at the external edge of the inner shade  221  and an appropriate interval is kept between the outer and inner shades  221 ,  211 ; a penetrating hole is disposed at the corresponding close end of the outer shade  211  and the inner shade  221 ; a screw rod  11  disposed on a support rod  10  is coupled to a lamp holder  231  after passing through each penetrating hole; a nut  12  installed on the support rod  10  is adjusted to secure and couple a close end of the inner shade  221  and the outer shade  211  integrally onto the support rod  10 ; a power cable (not shown in the figure) is disposed in the support rod  10 , and one end of the power cable is electrically coupled to an electric contact point in the lamp holder  231 , so that when a light bulb  230  is installed to the lamp holder  231 , the power cable will supply the required electric power for the light bulb  230  through the light holder  231  for the desired illumination. In this preferred embodiment, a lid  240  is coupled to the corresponding open end of the inner shade  221  and the outer shade  211 , and the lid  240  has an opening at its center; its internal edge presses against the external edge of a piece of transparent glass  241 ; and a watertight washer  242  is installed at the open end of the inner shade  221  and the outer shade  211 , such that the lid  240  is fixed to the open end of the inner shade  221  and the outer shade  211  as to waterproof the open end and allow the light produced by the light bulb  230  in the waterproof lampshade  20  to be emitted to the outside through the transparent glass  241 .  
         [0018]     Please refer to  FIG. 2  for a preferred embodiment of the present invention. It is noteworthy that a plurality of protrusions  212  is protruded from the outer shade  211  and each protrusion  212  has a weephole  213  disposed on the side facing the lid  240 . As shown in  FIG. 3 , the rainwater falling into the space between the inner shade  211  and the outer shade  211  from the foregoing weepholes  213  can flow between the inner shade  221  and the outer shade  211  and is drained by the weepholes  213  underneath. With reference to  FIG. 3 , the inner shade  211  has a plurality of bulges  222  disposed thereon and each bulge  222  is substantially conical in shape and has a ventilation hole  223  at its top. The rainwater falling from each weephole  213  into the space between the inner shade  221  and the outer shade  211  only can flow along the inner shade  211  on a flat surface without the bulges  222  and then the water is drained from the weepholes  213  underneath. As to the high temperature and hot air produced by the light bulb  230  inside the inner shade  221 , the heat can be dispersed to the space between the inner shade  221  and the outer shade  211  through the ventilation holes  223 , and then dispersed to the outside through the weepholes  213  disposed on the protrusions  212  as to effectively lower the temperature of the lampshade and greatly enhance the life of the light bulb  230  and the related components and circuits inside the waterproof lampshade  20 .  
         [0019]     Please refer to  FIG. 2  again. The preferred embodiment of the present invention further comprises a circular protruded rib  224  disposed between the inner shade  221  and the outer shade  211  corresponding to the lower edge of each weephole  213  for securing the close end of the inner shade  221  and the outer shade  211  onto the support rod  10 , so that when the protruded rib  224  is integrally coupled with the inner shade  221  and the outer shade  211 , the interval between the inner shade  221  and the outer shade  211  corresponding to the bulges  222  and the protrusions  212  is partitioned into an independent space for discharging water and dispersing hot air.  
         [0020]     Please refer to  FIG. 4  for another preferred embodiment. In  FIG. 4 , the structure of the waterproof lampshade  40  comprises an inner shade  421  and an outer shade  411 , wherein a plurality of bulges  422  is disposed at the external edge of the inner shade  421  and proximate to the close end of the inner shade  421 , and each bulge  422  is substantially conical in shape and has a ventilation hole  423  at its top. The outer shade  411  is disposed on the inner shade  421  for waterproofing the periphery of an end of the inner shade  421  that has the bulges  422  and keeps an appropriate interval from each other. The outer shade  411  comprises a plurality of protrusions  412  being protruded thereon and each protrusion  412  has a weephole  413  at the side facing the open end, and the edge of the open end presses on the external edge of the inner shade  421 , and a penetrating hole is disposed at a close end of the outer shade  411  and the inner shade  421 ; a screw rod  31  disposed on a support rod  30  is coupled with a lamp holder  431  after passing through each penetrating hole in sequence, and a nut  32  disposed on the support rod  30  is adjusted to secure one end of the inner shade  421  and the outer shade  411  integrally onto the support rod  30 , such that the interval between the inner shade  421  and the outer shade  411  corresponding to the bulges  422  and the protrusions  412  is partitioned into an independent space for discharging water and dispersing hot air. A lid  440  is coupled to the open end of the inner shade  421 , and the lid  440  has an opening at its center and its inner edge presses on the external edge of a piece of transparent glass  441 , and a watertight washer  442  is installed between the transparent glass  441  and the open end of the inner shade  421 . Therefore, if the lid  440  is coupled to the open end of the inner shade  421 , the open end will be watertight, and the light produced by the light bulb  430  in the waterproof lampshade  40  can be emitted to the outside through the transparent glass  441 .  
         [0021]     Similarly, in another preferred embodiment of the present invention as shown in  FIG. 5 , the structure of the waterproof lampshade  90  comprises an inner shade  921  and an outer shade  911 , wherein a plurality of protrusions  912  is disposed on the external shade  911  and proximate to the close end of the external shade  911 , and a ventilation hole  913  is disposed on the protrusion  912  facing the open end. The inner shade  921  has a plurality of bulges  922 , and each bulge  922  is substantially conical in shape and has a ventilation hole  923  disposed at its top, and the edge of an open end of the inner shade  921  presses on the lower edge of each weephole  913  disposed at the internal edge of the external shade  911  to keep an appropriate interval from each other. A penetrating hole is disposed at the corresponding close end of the outer shade  911  and the inner shade  921 ; a screw rod  51  disposed on a support rod  50  is coupled to a lamp holder  931  after passing through each penetrating hole; a nut  52  installed to the support rod  50  is adjusted to secure a close end of the inner shade  921  and the outer shade  911  integrally onto the support rod  50 , such that an interval between the inner shade  921  and the outer shade  911  corresponding to the bulges  922  and the protrusions  912  is partitioned into an independent space for discharging water and dispersing hot air. A lid  940  is coupled to the corresponding open end of the external shade  911 , and the lid  940  has an opening at its center; its internal edge presses on the external edge of a piece of transparent glass  941 ; and a watertight washer  942  is installed between the transparent glass  941  and the open end of the outer shade  911  such that the lid  940  is fixed to the open end of the outer shade  911  as to waterproof the open end and the light produced by the light bulb  930  in the waterproof lampshade  90  can be emitted to the outside through the transparent glass  941 .  
         [0022]     To prevent rainwater from entering into the space between inner shade  221 ,  421 ,  921  and the outer shade  211 ,  411 ,  911  through each weephole  213 ,  413 ,  913  or directly into the ventilation hole  223 ,  423 ,  923  disposed at the top of the bulge  222 ,  422 ,  922  on the inner shade  221 ,  421 ,  921  for the foregoing preferred embodiments of the present invention, the protrusions  212 ,  412 ,  912  and the bulges  222 ,  422 ,  922  or the weepholes  213 ,  413 ,  913  and the ventilation hole  223 ,  423 ,  923  are aligned alternately with each other to assure a better waterproof effect.  
         [0023]     Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.