Abstract:
A lighting fixture includes a body and a light emitting unit; the body being provided with a magnetic attraction device comprised a magnetic member with permanent permeability and a control member to control direction of magnetic filed lines from the magnetic member for it to provide attraction force or not; the lighting fixture being attached to a metallic surface when attraction force is provided or disengaged from the metallic surface by changing the direction of those magnetic force lines in the magnetic member.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     (a) Field of the Invention  
         [0002]     The present invention is related to a lighting fixture, and more particularly, to one that can be attached to metallic surface (e.g., refrigerator, metal door panel) for fast and easy access.  
         [0003]     (b) Description of the Prior Art  
         [0004]     A lighting fixture (e.g., a flashlight) usually becomes handy in case of power failure or at where city power fails to reach. In case of a power failure, it takes the lighting fixture to help the repair job. As illustrated in  FIG. 1  of the accompanying drawings, one has to bit a lighting fixture  1 , a flashlight in this case since he has to use both hands to work. If the repair job can be done in a short while, it&#39;s OK to bite the flashlight though it presents health problem; however, the job could go longer and must be interrupted as one&#39;s mouth getting sour by holding the flashlight in his mouth.  
       SUMMARY OF THE INVENTION  
       [0005]     The primary purpose of the present invention is to provide a lighting fixture that can be easily attached to metallic surface (e.g., refrigerator or metal door panel) for fast and convenient access.  
         [0006]     To achieve the purpose, the lighting fixture of the present invention includes a light emitting unit and a body. The body contains a cabinet to accommodate one or multiple cells to supply power to the light-emitting unit. A magnetic attraction device is disposed at where appropriately on the body and includes a magnetic member, a magnetism permeable member, a non-magnetism permeable member, and a control member. The magnetic member carries permanent magnetism. The control member controls the direction of those magnetic filed lines from the magnetic member to determine if the magnetism permeable member to carry magnetic force or not. When provided with magnetic force, the magnetism permeable member allows the lighting fixture to be attracted and held steady to a metallic surface (e.g., refrigerator, metal door panel); and the control member shifts the direction of those magnetic field lines to deprive the magnetism permeable member of magnetic attraction force for the lighting fixture to fast and easily disengage from the metal surface. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0007]      FIG. 1  is a schematic view showing an operating status of a lighting fixture of the prior art.  
         [0008]      FIG. 2  is an exploded view of a first preferred embodiment of the present invention.  
         [0009]      FIG. 3  is an exploded view of a second preferred embodiment of the present invention.  
         [0010]      FIGS. 4A and 4B  are a schematic views of a construction of a magnetic attraction device of the present invention.  
         [0011]      FIG. 5  is a schematic view showing an operating status of a lighting fixture of the present invention.  
         [0012]      FIG. 6  is a schematic view showing another construction of magnetic attraction device of the present invention.  
         [0013]      FIG. 7  is a perspective view of a third preferred embodiment of the present invention.  
         [0014]     FIGS.  8  (A), (B), ad (C) are schematic views showing that the lighting fixture of the present invention is attached to a metallic surface.  
         [0015]      FIG. 9  is a perspective view of a fourth preferred embodiment of the present invention.  
         [0016]      FIG. 10  is a perspective view showing that the fourth preferred embodiment is attached to a helmet.  
         [0017]      FIG. 11  is a perspective view of a fifth preferred embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0018]     Referring to  FIG. 2  for a construction of a lighting fixture  1 , which in the preferred embodiment related to a flashlight includes a light emitting unit  11  and a holder  12 . The light-emitting unit  11  is located at the head cap of the holder  12  of the lighting fixture to respectively provide front light emission. The holder  12  contains a cell  13  to supply power to a light-emitting device  111  disposed at the light-emitting unit  11 . The tail of the holder  12  is related to a threaded bottom cap  121  and a magnetic attraction device  2  is provided to the bottom cap  121 . Alternatively, the magnetic attraction device  2  is made as an integrated with the tail of the holder  12  as illustrated in  FIG. 3 .  
         [0019]     Now referring to  FIG. 4 (A), the magnetic attraction device  2  includes magnetic member  21 , magnetism permeable member  22 , non-magnetism permeable member  23 , and control member  24 . Wherein, the non-magnetism permeable member  23  is provided between two magnetism permeable members  22  to set them apart. The magnetic member  21  provided with permanent magnetism is also disposed between those two magnetism permeable members  22  with the size of the magnetic member  21  in such extent that it extends further into both magnetism permeable members  22 . The control member  24  is fixed to the holder  12  or a knob  14  disposed externally to the bottom cap  121 .  
         [0020]     Whereas the magnetic member  21  is inherited with the positive pole N and the negative S, it provides multiple closed magnetic force lines from N pole to S pole. When both N and S poles of the magnetic member  21  respectively contact those two magnetism permeable members  22 . That is, those magnetic force lines cross over both magnetism permeable members  22  for the latter to carry magnetic force. Accordingly the lighting fixture  1  attracts a metallic surface  3  (e.g., refrigerator or metal door panel) as illustrated in  FIG. 5  to provide lighting for one to carry on certain service work. By rotating the knob  14  to control the turning of the magnetic member  21  to change the direction of those magnetic force lines as illustrated in  FIG. 4 (B), both magnetism permeable members  22  are deprived of the magnetic force to allow easy disengagement of the lighting fixture from the metallic surface.  
         [0021]     Alternatively, the magnetism permeable member  22  of the magnetic member  2  is disposed between two non-magnetism permeable members  23  to separate them apart from each other as illustrated in  FIG. 6  with the magnetic member  21  placed at where closer to the magnetism permeable member  22 . The control member  24  includes a push key  241 , a push rod  242  and a coil  243  externally disposed to the holder  12 . One end of the push rod  242  is connected to the push key  241  and another end of the push rod  242  is connected to the magnetic member  21  leaving the coil  243  mounted to the magnetic member  21  on the opposite side corresponding to where the push rod  242  is located. By pressing the push key  241  to subject the magnetic member  21  to be transposed by the push rod  242  to laterally travel between both non-magnetism permeable members  23  and the magnetism permeable member  22 . Once the magnetic member  21  is fully moved to fall within the region covered by both non-magnetism permeable members  23  to clear from the magnetism permeable member  22 , the magnetism permeable member  22  is deprived for magnetic force thus to allow the lighting fixture  1  to disengage from the metallic surface.  
         [0022]     The light-emitting unit  11  is optionally disposed on one side of the holder to emit light from one side of the lighting fixture  1  as illustrated in  FIG. 7 . Meanwhile, the magnetic attraction device  2  may be provided on one side of the holder  12  to permit the lighting fixture  1  to attract onto the metallic surface  3  as illustrated in FIGS. (A), (B), and (C).  
         [0023]     Furthermore, the lighting fixture  1  is made in a square form as illustrated in  FIGS. 9 and 10 . Wherein, the light-emitting unit  11  is disposed on top of the holder  12  while the magnetic attraction device  2  is disposed to the holder  12  relatively to the lower end of the light-emitting unit  11 . Accordingly, the magnetic attraction device  2  secures the lighting fixture  1  onto the metallic surface for easy access by the user. A head strap  4  may be provided as illustrated in  FIG. 10  to help secure the lighting fixture  1  on a work helmet  5  the user wears.  
         [0024]     As illustrated in  FIG. 11 , a universal connector  6  and a base  7  are further provided to the lower end of the holder  12 , i.e., the bottom cap of a flashlight, with the magnetic attraction device  2  disposed in the base  7  for the magnetic attraction device  2  to hold the lighting fixture  1  in place when the base  7  is placed on the metallic surface; and the lighting fixture  1  swivels to a better angle as desired by the user by rotating the universal connector  6  to permit wider lighting coverage.  
         [0025]     The prevent invention provides an improved structure of a lighting fixture, and the application for a utility patent is duly filed accordingly. However, it is to be noted that the preferred embodiments disclosed in the specification and the accompanying drawings are not limiting the present invention; and that any construction, installation, or characteristics that is same or similar to that of the present invention should fall within the scope of the purposes and claims of the present invention.