Abstract:
The present invention relates to an indoor parking lot, comprising: a hollow frame portion, which is installed in the lengthwise direction on the ceiling along a driving path; and a lighting portion, which is fixedly installed on a side surface of the frame portion, for lighting the driving path and parking space around the driving path, wherein the lighting portion provides light distribution which is perpendicular to a driving direction of the driving path. The present invention is installed along the driving path of a vehicle which is between the parking spaces, so as to limit light distribution to directions on both sides of the direction of installation, thereby reducing the number of lighting portions while providing light having ample brightness to the parking spaces and a lighting space and thus effectively minimizing power consumption despite constant lighting.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of International Application No. PCT/KR2013/002974 filed on Apr. 9, 2013, which claims priority to Korean Application No. 20-2012-0002930 filed on Apr. 10, 2012. The applications are incorporated herein by reference 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates to a lighting device for an indoor parking lot, and more particularly to a lighting device for an indoor parking lot which can prevent glare during parking of a vehicle and intensively light a parking space. 
       BACKGROUND ART 
       [0003]    In general, a plurality of fluorescent lights are installed on a ceiling of an indoor parking lot. Fluorescent lights as light sources are relatively inexpensive but have a relatively short life span, and the brightness of the fluorescent lights decreases over time. 
         [0004]    A radiation angle corresponding to an angle by which light is emitted is 120 degrees or more, and a parking lot is illuminated at intensities of illumination which are similar as a whole. 
         [0005]    In order to solve a problem of a fluorescent light as a light source, which has a relatively short life span and a brightness of which gradually decreases over time, technologies for employing LEDs having a relatively long life span and consuming low electric power as lighting units of an indoor parking lot have been developed. 
         [0006]    Korean Patent Application Publication No. 10-2010-0086709 discloses such an example. Korean Patent Application Publication No. 10-2010-0086709 discloses a lighting control device for a basement parking lot, for lighting an indoor parking lot using LEDs which are partially switched on according to a motion of a person. 
         [0007]    However, although the device is designed to save electrical energy by simply replacing fluorescent lamps according to the related art by LED units, and selectively switching on and off the LED units according to a motion of a vehicle, it is further difficult to prevent crime and maintain security because there is no lighting unit around a hidden person who minimizes a motion. 
         [0008]    Further, sensors for detecting a motion of a vehicle or a person should be installed at important points, and because a switching system for coping with detection results of the sensors should be equipped, installation costs increase and maintenance costs also increase. 
         [0009]    In addition, in a lighting device of an indoor parking lot including a basement parking lot and an above-ground parking lot according to the related art, lighting units should be installed one the upper sides of a track of a vehicle and a parking space, energy consumption is relatively high. 
       SUMMARY 
       [0010]    Therefore, the present invention has been made in view of the above-mentioned problems, and an aspect of the present invention is a lighting device for an indoor parking lot which can minimize power consumption while normally providing lighting. 
         [0011]    The present invention also provides a lighting device for an indoor parking lot which can prevent a safety accident by preventing glare. 
         [0012]    The present invention also provides a lighting device for an indoor parking lot which can be easily maintained and repaired. 
         [0013]    The present invention also provides a lighting device for an indoor parking lot which can be easily and promptly installed by installing a monitoring camera in an indoor parking lot at the same time. 
         [0014]    In accordance with an aspect of the present invention, there is provided a lighting device for an indoor parking lot, including: a hollow frame installed on a ceiling lengthily along a track; and a lighting unit fixedly installed on a side surface of the frame, for lighting the track and a periphery of the track and providing a light distribution perpendicular to a travel direction of the track. 
         [0015]    The lighting device for an indoor parking lot according to the present invention is installed along a vehicle track between parking spaces to limit a light distribution on opposite sides of the installation direction to provide a parking space and a lighting space with a sufficient intensity of illumination while reducing the number of lighting units, thereby minimizing power consumption while normally lighting the parking lot. 
         [0016]    Further, the lighting device for an indoor parking lot according to the present invention can prevent a driver from being blinded by glare due to the lighting device when a vehicle enters or proceeds to a parking space, thereby preventing loss of attention due to the glare and preventing a safety accident. 
         [0017]    In addition, the lighting device for an indoor parking lot according to the present invention can be easily installed at an installation location of a ceiling of a parking lot, can be easily maintained and repaired, and can minimize initial installation costs and maintenance costs. 
         [0018]    Moreover, the lighting device for an indoor parking lot according to the present invention can solve an inconvenience of separately installing a lighting device and a monitoring camera because a monitoring camera can be installed at the same time. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]      FIG. 1  is a perspective view showing a bottom side of a lighting device for an indoor parking lot according to an embodiment of the present invention. 
           [0020]      FIG. 2  is a front view showing the lighting device for an indoor parking lot according to the embodiment of the present invention. 
           [0021]      FIG. 3  is a side view showing the lighting device for an indoor parking lot according to the embodiment of the present invention. 
           [0022]      FIG. 4  is a plan view for explaining an installation location of the lighting device for an indoor parking lot according to the embodiment of the present invention. 
           [0023]      FIG. 5  is an exploded perspective view showing a lighting unit applied to the present invention. 
           [0024]      FIGS. 6 and 7  are exploded perspective view showing a lighting device for an indoor parking lot according to another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0025]    Hereinafter, a configuration and an operation of a lighting device for an indoor parking lot according to exemplary embodiments of the present invention will be described with reference to the accompanying drawings. 
         [0026]      FIG. 1  is a perspective view showing a bottom side of a lighting device for an indoor parking lot according to an embodiment of the present invention.  FIG. 2  is a front view of  FIG. 1 .  FIG. 3  is a side view of  FIG. 1 .  FIG. 4  is a plan view for explaining an installation location of the lighting device for an indoor parking lot according to the embodiment of the present invention. 
         [0027]    Referring to  FIGS. 1 to 4 , the lighting device for an indoor parking lot according to an embodiment of the present invention includes a frame  10  into which an electric wire (not shown) is inserted and installed lengthily along a first track  100  having parking spaces  300  on opposite sides thereof and a second track  200  having a parking space  300  on one side thereof and having a wall surface  400  on an opposite side thereof, the frame  10  having an inclined side surface; first and second tracks  100  and  200  installed on a side surface of the frame  10 ; and lighting units  20  for lighting the parking spaces  300  adjacent to the first and second tracks  100  and  200 . 
         [0028]    The frame is formed of a light metal or a synthetic resin to be made light-weight, and a double-sided tape may be attached to an upper surface of the frame  10  such that the frame  10  is directly bonded and fixed to a ceiling of a parking lot or the frame  10  may be fixed to the ceiling of the parking lot by a bolt or the like. 
         [0029]    The frame  10  is a hollow integral structure, and a wire (not shown) located lengthily in the frame  10  along a lengthwise direction of the frame  10  and branch wires (not shown) branched from the wire, for supplying electric power to substrates provided in the lighting devices  20  may be provided in the frame  10 . 
         [0030]    The connection of the wires is configured to supply electric power to the lighting devices  20  provided on side surfaces of the frame  10  through the hollows of the frame  10 , and may be variously modified and managed. 
         [0031]    The frame  10  may be fixed to a ceiling at a central side of the first track  100  or a separate structure fixed to the ceiling, and may be attached to the ceiling through a double-sided tape or fixed to the ceiling through a fixing member such as a bolt as described above. 
         [0032]    It is more preferable that a double-sided tape is used when an ease of installation and maintenance is considered. 
         [0033]    When the frame  10  is installed in the second track  200 , it may be installed at the center of the second track  200  or at a location which leans on the wall surface  400 . As defined above, the second tracks  200  are paths located between the parking lots  300  and the wall surfaces  400  and along which vehicles may move, and the frame  10  may be fixedly installed to be closer to the wall surfaces  400  such that the lighting devices  20  may be installed only on a side of the frame  10  opposite to the wall surface  400 . 
         [0034]    This structure is designed as occasion demands, and the present invention is not limited by the installation location of the frame  10  close to the second track  200 . 
         [0035]    A side surface of the frame  10  is an inclined surface  11  such that a width of the bottom surface of the frame  10  facing the bottom surface of the parking lot is narrower than a width of the upper surface of the frame  10  contacting the ceiling, and the lighting unit  20  is fixedly coupled to the inclined surface  11  of the frame  10 . As described above, the lighting unit  20  receives electric power through the branch wire branched from the electric wire accommodated within the frame  10 . 
         [0036]      FIG. 5  is an exploded perspective view showing the lighting unit  20  according to the present invention. 
         [0037]    Referring to  FIG. 5 , the lighting unit  20  according to the present invention includes a bracket  21  for coupling to the inclined surface, which is a side surface of the frame  10 , a housing  22  fixed to the bracket  21 , a substrate  23  fixed to an inside of the housing  22  in parallel to the bracket  21 , for receiving electric power through the frame  10 , and an LED  24  mounted to the substrate  23 , for emitting light. 
         [0038]    The housing  22  has a semi-cylindrical structure in which a bottom side and a front side thereof is opened and functions to adjust a light distribution of light emitted from the LED  24 , and a cover  25  may be coupled to an opened portion of the housing  22  such that the housing  22  is finished. 
         [0039]    The light of the lighting unit  20  is distributed lengthily in a direction perpendicular to a lengthwise direction of the frame  10  by the housing  22  having the opened bottom and front sides, and the light of the LEDs cannot be viewed by the driver of a vehicle which travels along the first track  100  and the second track  200  but light may be irradiated to or reflected in the parking space  300  or on the wall surface  400  or a column  500  of the parking space  300  to provide a brightness of a reference intensity of illumination or more. 
         [0040]    In particular, light of a uniform intensity of illumination can light the parking spaces  300  while power consumption is reduced, by using the lighting units  20  spaced apart from each other through adjustment of the light distribution. 
         [0041]      FIG. 6  is an exploded perspective view showing a lighting device for an indoor parking lot according to another embodiment of the present invention. 
         [0042]    Referring to  FIG. 6 , the lighting device for an indoor parking lot according to the another embodiment of the present invention is provided to explain that a plurality of frames  10  may be connected to each other when the structures described with reference to  FIGS. 1 to 3  are actually installed, and a portion of a connection adapter  30  is inserted in a lengthwise direction of the frame  10  and another side of the connection adapter  30  is inserted into another frame  10  such that the frame  10  can be expanded in the lengthwise direction thereof. 
         [0043]    Opposite ends of the connection adapter  30  have the same shape as that of the frames  10  but a size smaller than that of the frames  10  to be inserted into the hollows of the frames  10 , and a central portion of the connection adapter  30  has at least the same area as that of inner surfaces of the hollows of the frames  10  so as not to be inserted into the inner surfaces of the hollows of the frames  10 . In this case, although the expression of area has been used, it is only for a convenience of description and it will be easily understood by those skilled in that art that the area corresponds to a size of a side surface of a space defined by the upper surface, the inclined surface  11 , and the bottom surface of the frame  10 . 
         [0044]    In this way, because the lighting device according to the present invention may be extended along the first track  100  and the second track  200  as shown in FIG.  4  using the connection adapter  30 , it may be applied to a parking lot irrespective of a width and a length of the parking lot. 
         [0045]      FIG. 7  is a view showing the lighting device for an indoor parking lot according to another embodiment of the present invention. 
         [0046]    Referring to  FIG. 7 , the camera  40  may be attached to the frame  10 . Then, the camera  40  is adapted to monitor and record a situation of a parking lot, and monitors generation of a safety accident to identify theft or arson of a vehicle. 
         [0047]    The camera  40  includes a camera housing  41  and a camera cover  42  in appearance, and the frame  10  may be connected to the camera housing  41  and the camera  40  may be fixed to a bottom surface of the frame  10  if necessary. 
         [0048]    The camera  40  requires a power line for receiving electric power and a signal line for transmitting an image photographed by the camera  40 , and both the power line and the signal line are inserted into the frame  10 . 
         [0049]    The connection of the camera  40  can solve an inconvenience of separately installing a lighting device and a camera, wiring power lines for supplying electric power, respectively, and separately using a mold for wiring a signal line in the camera according to the related art. 
         [0050]    According to the present invention, lighting and monitoring devices can be installed at the same time by adding the lighting units  20  which distribute light in a direction perpendicular to a travel direction of a vehicle traveling in the first and second tracks such that the vehicle does not cause glare to the inclined surface  11 , which is a side surface of the frame  10 , and installing the camera  40  on the bottom surface of the frame  10  in an area between the lighting units  20 . 
         [0051]    It will be appreciated by those skilled in the art to which the present invention pertains that the present invention is not limited to the embodiment and may be variously modified without departing from the spirit of the present invention. 
         [0052]    The present invention is industrially applicable because power consumption can be reduced by allowing effective lighting while reducing the number of lighting units in an indoor parking lot.