Patent Publication Number: US-2010110700-A1

Title: Lighting device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to a lighting device used in a handheld manner or being placed at a certain position, and more particularly to a housing structure of a lighting device provided with a special swing arm. 
     2. Related Art 
     Common lighting devices such as torch lights, camping lights, and working lamps can meet various illumination requirements depending upon different places. When it is intended to adjust an illumination angle of a lighting device, for example, as for a handheld torch light, the illumination angle of light rays is adjusted by adjusting an angle at which a user holds the torch light with a hand. In most cases, camping lights or working lamps are disposed in a suspended or magnetically attracted manner, which can avoid the inconvenience of holding with a hand and thus improve the convenience in usage. 
     Herein, a conventional working lamp is taken as an example. Referring to  FIG. 1 , a body  1  is provided with a light source  2  on a surface thereof. The body  1  is further provided with a hook  11  at a top end thereof for suspending the working lamp, and provided with a handle portion  12  at the other end thereof. The handle portion  12  is configured with a magnetic element  13  at a bottom thereof. The working lamp may be used in a suspending manner via the hook  11 , or in a handheld manner, or placed on a magnetic-conductive metal surface. The working lamp is applicable to various places due to its diversified using modes. However, since the body I and the light source  2  are integrally designed, the illumination angle cannot be adjusted, and as a result, the illumination angle thereof is restricted in usage. Therefore, the conventional working lamp still has certain defects, which needs to be improved. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention is directed to a lighting device, which is capable of adjusting an illumination angle thereof among multiple angles, and thus suitable for being used in various places. 
     In order to achieve the above objective, a lighting device is provided in the present invention, which includes a handle, a lamp, and a swing arm. The handle is extended with a pair of lugs on a top end thereof, and each of the lugs is provided with a pivoting hole at a central portion thereof. The lamp includes a housing and a light source. The housing is provided with a pivoting hole thereon. The swing arm is provided with a straight shaft and a horizontal shaft perpendicular to each other at two ends thereof. During assembly, the horizontal shaft of the swing arm is disposed between the two lugs on the top end of the handle, and the straight shaft of the swing arm is disposed within the pivoting hole of the housing, so that a power line electrically connected to the light source passes through the swing arm. 
     Hence, in usage, since the swing arm is capable of uni-directionally adjusting its swing angle (swinging up and down) relative to the handle, and the lamp is capable of rotating (rotating left and right) relative to the swing arm, the illumination angle (including rotating and swing angles) of the lamp can be adjusted steplessly. Therefore, no matter the lighting device of the present invention is used in a handheld, suspended, or magnetically attracted manner, the user can adjust the illumination angle thereof, thereby greatly improving the convenience in usage. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus is not limitative of the present invention, and wherein: 
         FIG. 1  is a stereogram of an appearance of a conventional working lamp; 
         FIG. 2  is an exploded stereogram of a preferred embodiment of the present invention; 
         FIG. 3  is a combined stereogram of a preferred embodiment of the present invention; 
         FIG. 4  is a first schematic view of adjustment of an illumination angle according to a preferred embodiment of the present invention; and 
         FIG. 5  is a second schematic view of adjustment of an illumination angle according to a preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In order to make the content of the present invention more comprehensible, the embodiments of the present invention are described below with reference to the accompanying drawings. 
     Referring to  FIGS. 2-5 , a lighting device of the present invention at least includes a handle  3 , a lamp  4 , and a hollow swing arm  5 . 
     The handle  3  includes a left shell  31  and a right shell  32 , which are respectively provided with a lug  311  and a lug  321  on top ends thereof. The left shell  31  and the right shell  32  can be engaged and fixed together into one piece. The lugs  311  and  321  are respectively provided with a pivoting hole  312  and a pivoting hole  322  at central portions thereof. The handle  3  is formed with an accommodation space  34  therein for accommodating a rechargeable battery  33 . The rechargeable battery  33  is connected to a connection port  36  on a surface of the handle  3  via a power line  35 . In addition, the rechargeable battery is electrically connected to the lamp. Moreover, the handle is provided with a switch  39  thereon. The switch  39  is electrically connected to the lamp  4  and the rechargeable battery  33 . The handle  3  is configured with a rotatable hook  37  and a magnetic element  38  at a bottom thereof for being used in a suspended or attracted manner. 
     The lamp  4  is mainly formed by a front housing  41 , a rear housing  42 , and a light source  43  (an LED light source shown in the figure). The front housing  41  is provided with a light-transmissive window portion  411  at a central portion thereof. The rear housing  42  is provided with a pivoting hole  421  at a central portion thereof. The light source  43  is wrapped and disposed within the front housing  41  and the rear housing  42 . Moreover, the light source  43  may also be an ordinary bulb (not shown) or a high-power Xenon bulb (not shown). Moreover, the pivoting hole  421  of the rear housing  42  is provided with a stopping portion (not marked in the figure) on an outer wall thereof. Correspondingly, the straight shaft of the swing arm is provided with a restricting portion thereon. 
     The hollow swing arm  5  is provided with a straight shaft  51  and a horizontal shaft  52  at two ends thereof, such that the straight shaft  51  and the horizontal shaft  52  are penetrated with each other. The horizontal shaft  52  of the swing arm  5  is disposed between the two lugs  311  and  321  on the top end of the handle  3 . The horizontal shaft  52  of the swing arm  5  is provided with a fixing bolt  53  therein. Two ends of the fixing bolt  53  are respectively locked at an exterior of the pivoting holes  312  and  322  of the lugs  311  and  321 , such that the swing arm  5  can swing back and forth with the pivoting holes  312  and  322  as pivot points. In addition, the horizontal shaft  52  of the swing arm  5  is provided with a line hole  521  at a central portion thereof. Moreover, the straight shaft  51  of the swing arm  5  is provided with an annular groove  511 . Therefore, during assembly, the straight shaft  51  is fastened within the annular groove  511  by a fixing ring  54  after the straight shaft  51  passes through the pivoting hole  421  of the rear housing  42 , so that the straight shaft  51  is engaged within the rear housing  42 , thereby enabling the swing arm  5  to rotate within the rear housing  42  freely without dropping out. Moreover, the straight shaft  51  of the swing arm  5  is configured with a restricting portion (not marked in the figure) thereon, such that the rotating angle of the lamp  4  can be restricted by the stopping portion together with the restricting portion. 
     Since the swing arm S is disposed between the handle  3  and the lamp  4  in two axial directions that are perpendicular to each other, more than two different angle adjustment modes can be used. As such, when a user pushes the swing arm  5  up and down (as shown in  FIG. 4 ), the swing arm  5  unidirectionally swings upwards or downwards relative to the pivoting positions of the handle  3 , thereby adjusting an inclination angle of the illumination of the lamp  4 . In addition, the user may also rotate the housing horizontally (as shown in  FIG. 5 ) to make the lamp  4  unidirectionally rotate leftwards or rightwards relative to the swing arm  5 , thereby adjusting a diffusion angle (rotation angle) of the illumination of the lamp  4 . Moreover, the rotation of the lamp  4  relative to the swing arm  5  and the swinging motion of the swing arm  5  relative to the handle  3  can also be adjusted at the same time, so as to adjust the illumination angle of the lamp  4  among multiple angles. Therefore, no matter the lighting device of the present invention is used in a handheld, suspended, or magnetically attracted manner, the user can adjust the illumination angle freely, thereby greatly improving the convenience in usage. 
     To sum up, the present invention has the following advantages during implementation. 
     1. Referring to  FIGS. 2-5 , the swing arm  5  having two perpendicular axial directions is movably disposed between the handle  3  and the lamp  4  in the present invention, which facilitates the adjustment of the illumination angle. 
     2. Moreover, the handle  3  of the present invention is provided with a hook  37  at a bottom thereof, which allows the lighting device to be used in a suspended manner. 
     3. The handle  3  of the present invention is further configured with a magnetic element  38  at a bottom thereof, which allows the lighting device to be used in a manner of being attracted on a metal surface. 
     The above descriptions are merely preferred embodiments of the present invention, but not intend to limit the scope of the present invention. Other alternations such as types of the light source or materials of the swing arm all fall within the scope of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the present invention, such as modifying the lamp into an ordinary bulb or a high-power bulb. 
     In view of the above, the lighting device meets the patent requirement of inventive step and also has industrial applicability. Therefore, the applicant files for a patent according to the provisions of the Patent Act.