Abstract:
A portable screen for setting up outdoors to display images projected thereonto from a beam projector and the like is provided. The portable screen being not only convenient to set up outdoors to be used, but additionally being stably supported to withstand even wind or external impact without easily collapsing to allow the image content to be comfortably viewed.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
       [0001]    This application is a continuation application, claiming the benefit under §365(c), of an International application filed on Jul. 8, 2015 and assigned application number PCT/KR2015/007076, which claimed the benefit of a Korean patent application filed on Jul. 25, 2014 in the Korean Intellectual Property Office and assigned Serial number 10-2014-0095066, the entire disclosure of which is hereby incorporated by reference. 
     
    
     TECHNICAL FIELD 
       [0002]    The present disclosure relates to a portable screen set up outdoors to display images projected from a beam projector and the like. More particularly, the present disclosure relates to a potable screen which is not only convenient to be set up outdoors to be used, but also stably supported to withstand even wind or external impact without moving of a sheet, thereby allowing an image to be comfortably viewed. 
       BACKGROUND 
       [0003]    In general, a beam projector is a display device which implements a very large picture by projecting light radiated from a lamp on a screen. A beam project used indoors is installed on a bottom surface or fixedly installed to a ceiling and a screen is installed to be spaced apart from the beam projector by an interval, such that the image projected from the beam projector may be projected on the screen at a suitable size. 
         [0004]    Meanwhile, in recent years, even a portable electronic device such as a smartphone or a digital camera employs a small volume of a beam projector module having high-intensity light source to confirm a video photographed thereby or easily utilize contents such as movies or animation, such that an enlarged image may be implemented by being projected on a screen, a wall, a paper, or fabrics, thereby confirming the image anytime. 
         [0005]    Meanwhile, as the five-day workweek system becomes common, people enjoying outdoor activities or camping as leisure activities have been increased. People consume video contents by enjoying movies or allowing their children to watch animation at camping places. 
         [0006]    However, since there is a limit in enjoying contents through an electronic device such as a smartphone, it is a problem that many people cannot together enjoy contents. 
         [0007]    Thus, to enjoy contents together with many people, several people prepare a small-size electronic device in which a beam projector is embedded and a separate screen on which an image is projected. Then, after the screen is install to a geographical material such as a tree (KR 2019990024216 U), or installed using a screen support formed in a form of a triangular support to enjoy a video (KR 100832777 B1). 
         [0008]    However, since geometric features at most of camping places or outdoor activity places are irregular, it may be often inconvenient to install a screen at such places. Even if there is a place at which the screen is installed, it is difficult to allow the screen to vertically stand up and to be evenly spread. Thus, there is a problem that the screen moves while enjoying movies as a geographic feature moves. 
         [0009]    In addition, in even a case that the screen support formed in a form of a triangular support is used, since the structure is very unstable, the screen may easily fall down even when a moderate wind rises. Even though not falling down, the screen seriously rolls from side to side, so that it is difficult to enjoy contents. 
         [0010]    The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the present disclosure. 
       SUMMARY 
       [0011]    Aspects of the present disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present disclosure is to provide a portable screen which can be easily prepared even at an outdoor place which is unsuitable to install the screen to enjoy, and have the center of gravity to be stable so that the screen has a stable installation structure to be stably supported without easily falling down even when a wind rises or external force is applied thereto. 
         [0012]    In this case, the screen is prevented from shaking by a wind or external force while the screen is maintained to be tightly spread, so that a user enjoys contents without being disturbed. 
         [0013]    Another aspect of the present disclosure is to provide a potable screen of which the assembly structure is simplified for the purpose thereof, such that the installing and uninstalling thereof is easy. If necessary, the portable screen is easily installed for use. The volume of the portable screen is minimized to be conveniently portable. 
         [0014]    In accordance with an aspect of the present disclosure, a portable screen is provided. The portable screen includes a draping frame which stands upright and includes frame bars formed at upper, lower, left and right sides thereof, wherein the frame bars are connected to each other with edge connectors to be formed in a rectangular frame, a support frame including another frame bar connected to the draping frame such that the support frame extends in rear of the draping frame, and a screen sheet provided on a front surface of the draping frame such that an image is projected thereon. 
         [0015]    In addition, the frame bars constituting the draping frame and the support frame are divided in a longitudinal direction and are pulled by elastic bands to elastically fix the frame bars, such that the frame bars are firmly assembled with each other without being arbitrarily separated from each other and a low part of the screen sheet is fixed while being downwardly pulled by an elastic element, thereby tightly spreading the screen sheet. 
         [0016]    According to the portable screen of the present disclosure, during outdoor activity or camping, the screen can be easily installed for use at even a place where any geometric features do not exist to be unsuitable to install the screen, and, due to convenient installing and uninstalling, so that a user can install or uninstalls the screen for a short time by himself, so the portable screen can be very conveniently used. 
         [0017]    In addition, even when a strong wind rises or the portable screen collides with the body of a walker so that external force is applied to the portable screen, since the portable screen does not fall down, the danger of a safety accident can be prevented and the expensive screen sheet can be prevented from being damaged in advance when the portable screen falls down. 
         [0018]    In addition, since a state that the screen sheet is tightly pulled is maintained while enjoying video contents, an image can be prevented from being distorted or hidden, so that the user enjoys a high quality of video contents, thereby improving the satisfaction. 
         [0019]    In addition, when the portable screen is uninstalled, since the volume of the portable screen is small, the portable screen is contained in a separate bag, so that the portable screen is conveniently portable. Further, since the keeping volume of the portable screen is not large, it is easy to load or keep the portable screen in a vehicle. 
         [0020]    In addition, in an installing state of the portable screen, since clothes or articles for an outdoor activity may be kept while being hanged in rear of the screen sheet, the portable screen may be used for a variety of reasons outdoors where the keeping space is insufficient. In a case that articles are hanged on the portable screen, the center of gravity is placed in rear of the portable screen, so that the portable screen can be more stably used. 
         [0021]    Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the present disclosure. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]    The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
           [0023]      FIG. 1  is a perspective view showing a screen according to an embodiment of the present disclosure. 
           [0024]      FIG. 2  is a perspective view showing a screen according to an embodiment of the present disclosure. 
           [0025]      FIG. 3  is a perspective view showing a state of installing a screen according to an embodiment of the present disclosure. 
           [0026]      FIG. 4  is a view showing a state of using a screen according to an embodiment of the present disclosure. 
           [0027]      FIG. 5  is an exploded perspective view showing a frame assembly structure according to an embodiment of the present disclosure. 
           [0028]      FIG. 6  is a flowchart illustrating a structure of installing a screen according to an embodiment of the present disclosure. 
           [0029]      FIGS. 7 and 8  are substantial views showing a structure of folding a frame bar according to various embodiments of the present disclosure. 
           [0030]      FIGS. 9 and 10  are views showing a state that a screen sheet is deployed and fixed while being pulled downwardly by an elastic element according to various embodiments of the present disclosure. 
       
    
    
       [0031]    Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
       DETAILED DESCRIPTION 
       [0032]    The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
         [0033]    The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents. 
         [0034]    It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
         [0035]    As the best mode according to an embodiment of the present disclosure, a portable screen installed outdoors to display an image, is provided. The portable screen includes a draping frame  100  including upper and lower frame bars  110   a  and  110   b,  frame bars  110   c,  and edge connectors  120 , wherein the frame bars  110   c  are arranged perpendicularly to sides of the upper and lower frame bars  110   a  and  110   b  to connect both ends of the upper frame bar  110   a  to both ends of the lower frame bar  110   b  through the frame bars  110   c,  the upper and lower frame bars  110   a  and  110   b,  and the frame bars  110   c  are connected to each other with the edge connectors  120  such that the draping frame  100  is formed in a rectangular shape, and the draping frame  100  stands vertically; 
         [0036]    a support frame  200  including a frame bar  210  extending in rear of the draping frame  100 , such that a center of gravity is induced downwardly; and 
         [0037]    a screen sheet  300  fixedly disposed on an upper end of the draping frame  100  while being downwardly spread such that an image is projected thereon. 
         [0038]    Hereinafter, the present disclosure will be described in detail with reference to accompanying drawings as follows. 
         [0039]      FIG. 1  is a perspective view showing a screen according to an embodiment of the present disclosure. 
         [0040]    As shown in  FIG. 1 , a portable screen according to the present disclosure may include a draping frame  100  vertically standing, a support frame  200  for supporting the draping frame  100  in a state that the draping frame  100  vertically stands, and a screen sheet ( 300 ) provided on the draping frame  100  and on which an image is projected. 
         [0041]    The draping frame  100  and the support frame  200  may include several frame bars  110  and  210  connected to each other, where each of the frame bars  110  and  210  are assembled with each other through edge connectors  120  and  220 . 
         [0042]    The draping frame  100 , on which the screen sheet  300  is hanged to be fixed, has a structure, where frame bars  110   c  are arranged perpendicularly to sides of upper and lower frame bars  110   a  and  110   b  to connect both ends of the upper frame bar  110   a  to both ends of the lower frame bar  110   b  therethrough, the upper and lower frame bars  110   a  and  110   b,  and the frame bars  110   c  are connected to each other with the edge connectors  120 , such that the draping frame  100  is formed in a rectangular frame, and the draping frame  100  stands vertically to be fixed. 
         [0043]    The edge connector  120  includes an inserting socket  122  corresponding to a diameter of the frame bar to assemble the frame bars  110 . The frame bars  110  may assembled with each other by inserting the frame bars  110  into the inserting sockets  122 . 
         [0044]    The inserting socket  122  is further formed in rear of the draping frame  100  to assemble the frame bar  210  of the support frame  200 . The edge connector  220  for connecting the frame bars  210  of the support frame  200  to each other may be further formed, such that the edge connector  220  and the frame bars  210  are assembled in the same structure as that of the draping frame  100 . 
         [0045]    In this case, an angle of each of the inserting sockets  122  and  222  formed in the edge connectors  120  and  220  may be variously formed corresponding to a desired assembly form of the frame bars  110  and  210 . 
         [0046]    The draping frame  100  includes four edge connectors  120  assembled at both upper sides and both lower sides, respectively. Each of the four edge connectors  120  may have an inserting socket  122  such that the frame bars  210  of the support frame  200  are assembled with each other in rear of the draping frame  100 . Alternatively, the inserting socket  122  may be selective formed in some of upper or lower ends of the edge connectors  120 . 
         [0047]    Preferably, the inserting sockets  122  may be formed in all the edge connectors  120  installed on four edges such that the frame bars  210  of the support frame  200  are assembled with each other. 
         [0048]    The support frame  200  may hold the center of gravity such that the draping frame is prevented from falling down in the state that the draping frame vertically stands. The frame bars  210  are assembled to the edge connectors  120  of the draping frame  100  in rear of the draping frame  100 , and the frame bars  210  are connected to the edge connectors  220  such that the center of gravity of the screen is located in rear of the screen. 
         [0049]      FIG. 2  is a perspective view showing a screen according to an embodiment of the present disclosure,  FIG. 3  is a perspective view showing a state of installing a screen according to an embodiment of the present disclosure, and  FIG. 4  is a view showing a state of using a screen according to an embodiment of the present disclosure. 
         [0050]    In this case, as shown in  FIG. 1 , the frame bars  210  assembled to be connected in rear of the draping frame  100  may be arranged to be concentrated on one position. Alternatively, as shown in  FIG. 2 , the frame bars  210 , which are connected to two edge connectors  120  at the upper side of the draping frame  100 , are connected to each other through the edge connector  220  to construct an upper frame  200   a  formed in a polygonal shape. In addition, the frame bars  210 , which are connected to two edge connectors  120  at the lower side of the draping frame  100 , are connected to each other through the edge connector  220  to construct a lower frame  200   b  formed in a polygonal shape. The upper and lower frames  200   a  and  200   b  may be assembled with each other to be vertically connected with each other by using a vertical frame bar  200   c.    
         [0051]    In this case, a camping article or another may be hanged on the upper frame  200   a  constituting the support frame  200  to be kept and to this end, a separate hanging ring (not shown) may be provided. 
         [0052]    As configured above, when the upper and lower frames  200   a  and  200   b  are formed in a regular triangular shape, since all the frame bars  110  and  210  used for the draping frame  100  and the support frame  200  may have the same length and the edge connectors  220  may have the same shape or form, the manufacturing cost may be reduced. Even when the portable screen is installed, the portable screen may be easily assembled without any need to determine where a component is placed. 
         [0053]    In addition, elastic bands  130  and  230  are installed to the frame bars  110  and  210  constituting the draping frame  100  and the support frame  200  to connect the edge connectors  120  and  220  to each other, such that the draping frame and the supporting frame may be elastically fixed to be prevented from being arbitrarily separated from each other. 
         [0054]      FIG. 5  is an exploded perspective view showing a frame assembly structure according to an embodiment of the present disclosure and  FIG. 6  is a flowchart illustrating a structure of installing a screen according to an embodiment of the present disclosure. 
         [0055]    As shown in  FIG. 5 , in the installing structure of the elastic bands  130  and  230 , the edge connectors  120 ,  220  are formed with punched holes  124  and  224 , and fixing members  134  and  234  are formed on both ends of the frame bars  110  and  210 , such that the edge connectors assembled on both ends of the frame bars  110  and  210  are elastically fixed while pulling each other. Thus, in the assembled state of the draping frame  100  and the support frame  200 , the frame bars are prevented from be arbitrarily released and easily separated from the edge connectors, so that the installing structure may be stably supported. 
         [0056]    If the frame bar  110  or  210  is manufactured to be divided into at least two pieces in a longitudinal direction, when the portable screen is kept, the keeping volume may be reduced and easily portable. 
         [0057]    The divided frame bars  110  and  210  are assembled with each other through the connecting sockets  112  and  212 . 
         [0058]      FIGS. 7 and 8  are substantial views showing a structure of folding a frame bar according to various embodiments of the present disclosure. 
         [0059]    As shown in  FIG. 7 , the connecting structure of the divided frame bars  110  and  210  may be simply folded or unfolded by embedding elastic strings  114  and  214  in the frame bars  110  and  210 . Alternatively, as shown in  FIG. 8 , after dividing the frame bars  110  and  210 , folding elements  116  and  216  are installed to the connecting portions, such that the frame bar may be unfolded in a folding type to be installed or may be folded to be kept. 
         [0060]    Meanwhile, the screen sheet  300  may be provided on the front surface of the draping frame  100  while being spread such that an image is projected thereon. Horizontal bars  304  are installed on upper and lower sides of a functional sheet  302  such that the screen sheet  300  may be provided while being spread and wound to be kept. 
         [0061]    In the structure of providing the screen sheet  300  to the draping frame  100 , a hanging part  126  is provided to an upper end of the draping frame  100 , and a hanging ring  310  may be formed on an upper portion of the screen sheet  300  to be fixedly hanged. 
         [0062]    In this case, preferably, in the hanging part  126 , a fitting hole  127  is formed in the edge connector  120  and a hanging member  128  is inserted into a punched hole  128  such that the screen sheet may be fixedly hanged. 
         [0063]    Preferably, the screen sheet  300  may be provided in front of the draping frame  100 . The horizontal bar  304  constituting the screen sheet  300  may be formed to have a length relatively longer than the interval between both side frame bars  110   c  of the draping frame  100 , such that the screen sheet  300  is tightly provided in front of the draping frame  100  while the horizontal bar  304  is supported by both side frames  100   c.    
         [0064]    In addition, since the screen sheet  300  is provided to be tightly closed to the draping frame  100  by the horizontal bar  304  without any units for fixing the screen sheet  300 , the screen sheet  300  may be stably maintained in a folded state. 
         [0065]    As a unit for preventing the screen sheet  300  from moving, a fixing band  320  may be further formed on a lower portion of the screen sheet  300 . 
         [0066]    The fixing band  320  may be wound around the frame bar  110  of the draping frame  100  and fixed to the frame bar  110  of the draping frame  100  by installing the fixing band  320  to the functional sheet  302  or the horizontal bar  304 . In this case, a Velcro-fastener or a snap button may be used as the coupling structure of the fixing band  320 . 
         [0067]      FIGS. 9 and 10  are views showing a state that a screen sheet is deployed and fixed while being pulled downwardly by an elastic element according to various embodiments of the present disclosure. 
         [0068]    As shown in  FIGS. 9 and 10 , as another unit for further preventing the screen sheet  300  from moving, an elastic element  330  for fixing the horizontal bar  304  of the screen sheet  300  by downwardly pulling the horizontal bar  304  of the screen sheet  300  may be used. 
         [0069]    When one end of the elastic element  300  is installed to two edge connectors  120  formed on a lower end of the draping frame  100 , and the opposite end of the elastic element  300  is fixed to both ends of the horizontal bar  304  formed on a low portion of the screen sheet  300 , the functional sheet  302  is downwardly pulled by the elastic element  330  to be fixed, so that the screen sheet  300  may be stably maintained in a tightly spread state. 
         [0070]    In this case, as a material of the elastic element  330 , various materials having elasticity such as a rubber band or a silicon ring may be used. 
         [0071]    When the low part of the screen sheet  300  is downwardly pulled by using the elasticity of the electric element  330 , the screen sheet  300  may be tightly spread and may be stably maintained in a spread state without moving due to elasticity. 
         [0072]    In addition, as shown in  FIG. 10 , when the elastic element  330  is provided with a length adjustment member  332 , the length of the elastic element  330  may be adjusted. When tension of the elastic element  330  is adjusted or the installing height of the screen sheet  300  is high or low, the length may be adjusted to correspond to it. Alternatively, when screen sheets having various sizes are compatibly provided, the length of the elastic element  330  may be adjusted corresponding to the screen size. 
         [0073]    While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.