Abstract:
Disclosed is a structure of desk lamp, including a base, a support arm, and a lampshade. The lampshade is composed of a first lampshade portion and a second lampshade portion. The first and second lampshade portions are relatively movable with respect to each other and are removably coupled to each other (for being fixed together or separated from each other) to allow the second lampshade portion to selectively serve as a separate portable lighting device thereby making the use thereof easy and providing excellent convenience of use.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a structure of desk lamp, and in particular to a desk lamp structure comprising a separable lampshade that can individually serve as portable lighting device. 
       BACKGROUND OF THE INVENTION 
       [0002]    Modern people use lighting devices, such as a desk lamp, to improve illumination of a corner of an isolated area where lighting is weak in order to supply sufficient lighting for protection of human eyes against potential risk of eyesight damages caused by long term insufficiency of lighting, such as shortsightedness and blurring of sight. 
         [0003]    With reference to  FIG. 6  of the attached drawings, which shows a perspective view of the structure of a conventional desk lamp, generally designated as  400 , the conventional desk lamp  400  comprises a base  410 , an extension arm  420 , and a lighting tube hood or lampshade  430 . The base  410  is coupled to an end of the extension arm  420 , while the lampshade  430  is coupled to an opposite end of the extension arm  420 . The base  410  is placed flat on for example a desktop, and the extension arm  420  adjustably sets the. lampshade  430  to a desired orientation according to the needs of a user. However, the desk lamp  400  can only be used by being placed on a desktop and is not easy for carrying. This reduces the usability thereof. 
         [0004]    In view of this problem, the present invention aims to provide a structure of desk lamp that is easy to carry and enhances the use thereof in order to reduce costs and enhance production performance. 
       SUMMARY OF THE INVENTION 
       [0005]    A primary objective of the present invention is to provide a structure of desk lamp comprising a lampshade that is composed of first and second portions which can be selectively coupled together or separated from each other to allow the second lampshade portion to serve as a separate portable lighting device thereby making the use thereof easy and providing excellent convenience of use. 
         [0006]    To realize the above objectives, the present invention provides a desk lamp comprising a base, a support arm connected to the base, and a lampshade connected to the support arm. The lampshade comprises a lampshade base, which comprises a first base member and a second base member, the first base member forming a plurality of first coupling sections, the second base member forming a plurality of second coupling sections corresponding to the first coupling sections; a lampshade cover, which comprises a first cover member corresponding to the first base member and a second cover member corresponding to the second base member, the first cover member forming a first positioning section, the second cover member forming an opening, the first base member and the first cover member being secured together to form a first lampshade portion, the second base member and the second cover member being secured together to form a second lampshade portion, the first coupling sections and the second coupling sections mating each other and coupled together to have the first lampshade portion coupled to the second lampshade portion to define an accommodation chamber; and a lighting source, which is received in the accommodation chamber and comprises a power source and a power source connection member for connection with a power cable, whereby the first coupling sections and the second coupling sections are allow to perform relative movement therebetween (such as being coupled together or detached from each other) to have the first lampshade portion and the second lampshade portion selectively coupled together or detached from each other and the power source connection member is allowed for relative movement to selectively supply electrical power to the lighting source for emitting light that projects through the opening. As such, the operation is made easy and excellent convenience of use is provided. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    The present invention will be apparent to those skilled in the art by reading the following description of a preferred embodiment thereof with reference to the drawings, in which: 
           [0008]      FIG. 1  is a perspective view of a desk lamp constructed in accordance with the present invention; 
           [0009]      FIG. 2  is an exploded view of the desk lamp of the present invention; 
           [0010]      FIGS. 3 and 4  are schematic views of a lampshade base and a lampshade cover of the desk lamp in accordance with the present invention; 
           [0011]      FIG. 5  is a schematic view illustrating a condition of use of the lampshade base and the lampshade cover of the desk lamp of the present invention; and 
           [0012]      FIG. 6  is a perspective view of a conventional desk lamp. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0013]    With reference to  FIGS. 1-5 , which respectively show a perspective view of a desk lamp of the present invention, an exploded view of the desk lamp of the present invention, and views of a lampshade base and lampshade cover of the desk lamp of the present invention, the desk lamp of the present invention comprises a base  100 , a support arm  200  connected to the base  100 , and a lampshade  300  connected to the support arm  200 . The base  100  comprises a power cable  110  for supplying electrical power. The lampshade  300  comprises a lampshade base  310 , a lampshade cover  320 , and a lighting source  340 . The lampshade base  310  and the lampshade cover  320  are secured together with fasteners  301 , such as bolts, to define an accommodation chamber  330 , whereby the lighting source  340  is received in the accommodation chamber  330 . 
         [0014]    The lampshade base  310  is composed of a first base member  311  and a second base member  312 . The first base member  311  forms a plurality of first coupling sections  3111  (such as resilient projections), and the second base member  312  forms a plurality of second coupling sections  3121  (such as openings) corresponding to the first coupling sections  3111 . 
         [0015]    The lampshade cover  320  is composed of a first cover member  321  corresponding to the first base member  311  and a second cover member  322  corresponding to the second base member  312 . The first cover member  321  forms a first positioning section  3211  and the second cover member  322  forms a second positioning section  3221 , an opening  3222 , and a transparent lid  3223  set in the opening  3222 . The first base member  311  and the first cover member  321  are secured together with fasteners  301  to form a first lampshade portion  302 , and the second base member  312  and the second cover member  322  are secured together with fasteners  301  to form a second lampshade portion  303 . The first coupling sections  3111  and the second coupling sections  3121  mate each other and are coupled together and the first positioning section  3211  and the second positioning section  3221  mate each other and are coupled together so that the first lampshade portion  302  is coupled to the second lampshade portion  303  to define the accommodation chamber  330 . 
         [0016]    The lighting source  340  comprises a device that emits lights, such as a circuit board carrying light-emitting diodes or a lighting tube connected to a control circuit board and is set in the accommodation chamber  330  formed by coupling the lampshade base  310  and the lampshade cover  320  together. The light emitting from the lighting source  340  projects outward through the opening  3222  of the lampshade cover  320 . The lighting source  340  is provided with a power source  341  (such as a storage battery) and a power source connection member  342  (such as an electrical conduction means, for example a male/female connector or electrically conductive spring plate). Electrical connection with an external power source can be established with the power source connection member  342  and the power cable  110  of the base  100  and also electrical power can be stored in the power source  341 , whereby when the first coupling sections  3111  are detached from the second coupling sections  3121  to separate the first lampshade portion  302  from the second lampshade portion  303  and the power source connection member  342  is separated from the power cable  110 , the power source  341  functions to supply electrical power to the lighting source  340  to allow the lighting source  340  to provide light that projects through the opening  3222 . 
         [0017]    Further referring to  FIGS. 4 and 5 , which show the condition of use of the lampshade base and the lampshade cover of the desk lamp structure of the present invention, first of all, the lighting source  340  is placed in the opening  3222  of the lampshade cover  320  and the first base member  311  of the lampshade base  310  is put opposing to the first cover member  321  of the lampshade cover  320  and are secured together with the fasteners  301  to form the first lampshade portion  302 . Also, the second base member  312  of the lampshade base  310  is put opposing to the second cover member  322  of the lampshade cover  320  and they are secured together with the fasteners  301  to form the second lampshade portion  303 . The first coupling sections  3111  and the second coupling sections  3121  then mate each other and are coupled together and the first positioning section  3211  mates and is coupled to the second positioning section  3221  to have the first lampshade portion  302  and the second lampshade portion  303  coupled together. In other words, the lighting source  340  is housed in the accommodation chamber  330  formed by coupling the lampshade base  310  and the lampshade cover  320  together. The light emitting from the lighting source  340  projects outward through the opening of the lampshade cover  320  to serve as a lighting device. 
         [0018]    Further, the coupling pieces  3111  are resilient elements, whereby a user may depress the coupling pieces  3111  to cause the coupling pieces  3111  to disengage from the second coupling sections  3121  and having the first positioning section  3211  and the second positioning section  3221  separating from each other so as to separate the first lampshade portion  302  and the second lampshade portion  303  from each other. Further, since the power source connection member  342  of the lighting source  340  can be electrical conduction means, such as a male/female connector or an electrically conductive spring plate, when the first lampshade portion  302  and the second lampshade portion  303  are separated, the power source  341  can be readily detached from the power cable  110 , whereby relative movement therebetween (such as being coupled to each other or being detached from each other) is made easy. Since the lighting source  340  is provided with the power source  341  for storage of electrical power, when the first lampshade portion  302  and the second lampshade portion  303  are separated, the power source  341  may supply electrical power to the lighting source  340  to energize the lighting source  340  for emitting light that projects through the opening  3222  of the second cover member  322 . In this way, the second lampshade portion  303  of the lampshade  300  may serve as a portable lighting device, which facilitates easy portability by a user and thus enhances the convenience thereof. 
         [0019]    To summarize, the desk lamp in accordance with the present invention comprises a support arm connected to both a base and a lampshade and the lampshade is composed of a first lampshade portion and a second lampshade portion. The first lampshade portion comprises a plurality of first coupling sections and first positioning section, while the second lampshade portion comprises a plurality of second coupling sections and a second positioning section. Through mating and mutual coupling between the first coupling sections with the second coupling sections, the first lampshade portion and the second lampshade portion are coupled together. Further, a user may depress the coupling pieces to have the coupling pieces disengaging from the second coupling sections and having the first positioning section separating from the second positioning section, so as to separate the first lampshade portion from the second lampshade portion. Since the lighting source is provided with a power source for storage of electrical power, when the first lampshade portion and the second lampshade portion are separated from each other, the power source may supply electrical power to the lighting source to energize the lighting source for emitting light that projects through the opening of the second cover member, so that the second lampshade portion of the lampshade may serve as a portable lighting device, which facilitates relative movement (such as being coupled together or being separated from each other) and provides excellent use convenience. 
         [0020]    Although the present invention has been described with reference to the preferred embodiment thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.