Patent Publication Number: US-11375788-B2

Title: Luggage with support

Description:
TECHNICAL FIELD 
     The present invention herein relates to a luggage with a support. 
     BACKGROUND 
     In general, a luggage is mainly used when a user travels to foreign countries or goes for a long stay travel. The luggage includes a storage space for storing articles therein, a handle disposed at an upper side thereof, and a wheel disposed at a bottom surface thereof and being in rolling contact with the ground, so that the user may hold the handle to pull the luggage without lifting the luggage. 
     Since the luggage may further easily carry a heavy load during a movement as the luggage is configured to have the above-described structure, the luggage has been used without considerable inconvenience. 
     However, the typical luggage has an inconvenient aspect in that when organizing or taking out articles in the luggage, the user has to bent oneself or squat down while the luggage is laid down on the ground, or put the luggage on a desk or a bed. Some hotels, to relieve the above-described inconvenience, separately prepare a luggage support having a height similar to a user&#39;s thigh height so that the luggage is able to be disposed thereon. However, the separate support may have a place restriction in that the support may be used at only the place where the support is prepared, and also have a limitation in that the luggage may not be supported when the luggage has a size much greater than that of the support. Also, since the user is required to lift and place the luggage on the support, it is a disadvantage that the user devotes one&#39;s efforts to put the heavy luggage on the support. 
     DETAILED EXPLANATION OF THE INVENTION 
     Technical Problem 
     The present invention provides a luggage that forms a support by itself without requiring a separate support. 
     The present invention also provides a luggage capable of forming a structure in which the luggage is further easily disposed on the support when the support provided in the luggage is formed. 
     The objectives of the present invention are not limited to the aforementioned object, but other objectives not described herein will be clearly understood by those skilled in the art from descriptions below. 
     Solution to the Problem 
     An embodiment of the present invention provides a luggage with a support, the luggage including: a main body unit having a storage space therein; a cover unit configured to close the storage space of the main body unit; and a frame unit provided on a rear surface of the main body unit to form a support configured to support the main body unit. Here, the frame unit includes: a first frame having one side fixed to a lower portion of the main body unit and the other side that is rotatable; and a second frame configured to move along the rotation of the first frame and form the support with the first frame. 
     In an embodiment, the second frame may have one side fixed to an upper portion of the main body unit and the other side rotating along the rotation of the first frame. 
     In an embodiment, the first frame or the second frame may further include: a connection part configured to connect the first frame and the second frame; and a guide line configured to guide a movement of the connection part. 
     In an embodiment, the first frame may further include a fixing part configured to fix positions of the first frame and the second frame, and the second frame may further include a fixing groove which is provided at a lower end side of the guide line and to which the fixing part is inserted. Here, the fixing part may be inserted to and separated from the fixing groove. 
     In an embodiment, the luggage may further include a control part configured to control the insertion and separation of the fixing part with respect to the fixing groove. 
     In an embodiment, the first frame may include: an outer frame provided at each of both left and right sides of the rear surface of the main body unit; and an inner frame inserted to an upper end of the outer frame to vertically move, and configured to connect the outer frames. 
     In an embodiment, the first frame may include: an inner frame provided at each of both left and right sides of the rear surface of the main body unit; and an outer frame into which the inner frame can be inserted. And the outer frame may be movable vertically having the inner frame inside the outer frame. 
     In an embodiment, the main body unit may further include a locking part provided at an upper portion of the main body unit to prevent the frame unit from being separated from the main body unit, and the first frame further include a locking groove to which the locking part is inserted. Here, the locking part may be inserted to and separated from the locking groove. 
     In an embodiment, the luggage may further include a locking control part configured to control the insertion and separation of the locking part with respect to the locking groove. 
     In an embodiment, the cover unit may include a first cover and a second cover, which are opened in opposite directions to each other. 
     In an embodiment, each of the first cover and the second cover may have a rectangular parallelepiped shape in which one side surface facing the main body unit is opened. 
     In an embodiment, each of the first cover and the second cover may have a detachable surface at which the first cover and the second cover contact each other. 
     In an embodiment, the second frame may further include an auxiliary frame provided at one side of the second frame to extend the second frame. 
     In an embodiment, the auxiliary frame may be connected to one end of the second frame through a hinge, and move along a rail provided on the rear surface of the main body unit. 
     In an embodiment, the auxiliary frame may be inserted into the second frame in a movable manner. 
     In an embodiment, the second frame may have one side that is movable along a rail part provided at an upper portion of the main body unit. 
     In an embodiment, the second frame may further include a coupling part disposed at one side thereof, and inserted to and separated from the main body unit, and the main body unit may further include a coupling groove which is disposed at each of upper and lower ends of the rail part and to which the coupling part is inserted. 
     In an embodiment, the main body unit may further include a coupling part disposed at each of the upper and lower ends of the rail part, and inserted to and separated from the second frame, and the second frame may further include a coupling groove which is defined at one side of the second frame and to which the coupling part is inserted. 
     In an embodiment, the main body unit may further include a frame accommodation groove defined at the rear surface of the main body unit to accommodate the frame unit. 
     Advantageous Effects 
     The luggage according to an embodiment of the present invention may form the support capable of supporting the luggage. 
     Also, the luggage according to an embodiment of the present invention may form the structure of disposing the luggage on the support with a less force based on the principle of the lever. 
     The objectives of the present invention are not limited to the aforesaid, but other objectives not described herein will be clearly understood by those skilled in the art from descriptions below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating a luggage according to an embodiment of the present invention; 
         FIG. 2  is an exploded perspective view illustrating the luggage with a support according to an embodiment of the present invention; 
         FIG. 3  is a view illustrating a process of forming the support of the luggage according to an embodiment of the present invention; 
         FIG. 4  is a usage state view illustrating the luggage with the support according to an embodiment of the present invention; 
         FIGS. 5 a -5 c    are views for explaining a position of a fixing part according to an operation of a control part according to an embodiment of the present invention; 
         FIGS. 6 a -6 b    are views for explaining a position of a locking part according to an operation of a locking control part according to an embodiment of the present invention; 
         FIGS. 7 a -7 b    and  FIGS. 8 a -8 b    are views for explaining a process of forming a support of a frame unit according to another embodiment of the present invention; 
         FIGS. 9 a -9 b    are views for explaining a process of forming a support of a frame unit according to another embodiment of the present invention; 
         FIGS. 10 a -10 b    are views for explaining an operation of a coupling part according to an operation of a coupling control part in the embodiment of  FIG. 9 ; 
         FIGS. 11 a -11 b    are views for explaining a process of forming a support of a frame unit according to another embodiment of the present invention; and 
         FIGS. 12 a -12 b    are views for explaining an operation of a coupling part in the embodiment in  FIG. 9 or 11 . 
     
    
    
     DETAILED DESCRIPTION 
     In the following description, the technical terms are used only for explaining a specific exemplary embodiment while not limiting the present disclosure. 
     The terms of a singular form may include plural forms unless referred to the contrary. The meaning of ‘comprises’ and/or ‘comprising’ does not exclude other components besides a mentioned component. Like reference numerals refer to like elements throughout, and the word ‘and/or’ means that one or more or a combination of relevant constituent elements is possible. It will be understood that although the terms of first and second are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one component from another component. Thus, as long as they are within the technical scope of the present invention, a first element could be termed a second element, and similarly a second element could be termed a first element. Furthermore, when it is described that one comprises (or includes or has) some elements, it should be understood that it may comprise (or include or has) only those elements, or it may comprise (or include or have) other elements as well as those elements if there is no specific limitation. 
     Hereinafter, exemplary embodiments of the present invention will be explained in detail with reference to the accompanying drawings. 
       FIG. 1  is a perspective view illustrating a luggage according to an embodiment of the present invention. 
     As illustrated in  FIG. 1 , a luggage  10  according to an embodiment of the present invention may include a main body unit  100 , a frame unit  200 , a cover unit  300 , and a moving wheel  400 . 
     The main body unit  100  has a storage space defined therein and includes a frame accommodation groove  110  defined at each of both sides of a rear surface  101  of the main body unit  100  to accommodate the frame unit  200 . As the frame accommodation groove  110  is defined in the main body unit  100  to accommodate the frame unit  200 , the luggage may maintain a flat rear surface when the support is not formed. 
     The frame unit  200  is provided at the rear surface  101  of the main body unit  100  to form a support that supports the main body unit  100 . The frame unit  200  may include a first frame  210  and a second frame  220 , which form an X-shape when the support is formed. The first frame  210  may have one side fixed to a lower portion of the main body unit  100  and the other side that is rotatable. For example, the one side of the first frame  210 , which is fixed to the lower portion of the main body unit  100 , may be fixed by being coupled to a hinge shaft  110   b  provided at the lower portion of the main body unit  100 . The second frame  220  may move along the rotation of the first frame  210  so as to form the support with the first frame  210 . In an embodiment, the second frame  220  may have one side fixed to an upper portion of the main body unit  100  and the other side that is rotatable. For example, the one side of the second frame  220 , which is fixed to the upper portion of the main body unit  100 , may be fixed by being coupled to a hinge shaft  110   a  provided at the upper portion of the main body unit  100 . Also, the second frame  220  may rotate along the rotation of the first frame  210 . For example, the second frame  220  may rotate at the same or similar distance and angle as a movement distance and a movement angle of the first frame  210 . 
     The first frame  210  or the second frame  220  of the frame unit  200  may include a connection part  211  connecting the first frame  210  and the second frame  220  and a guide line  221  guiding a movement of the connection part  211 . For example, when the connection part  211  is provided to one of the first frame  210  or the second frame  220 , the guide line  221  may be provided to the frame not including the connection part  211 . Also, the first frame  210  or the second frame  220  of the frame unit  200  may further include a fixing part  213  fixing positions of the first frame  210  and the second frame  220  and a fixing groove  223  to which the fixing part  213  is inserted. For example, when the fixing part  213  is provided to one of the first frame  210  and the second frame  220 , the fixing groove  223  may be provided to the frame not including the fixing part  213 . 
     The cover unit  300  may close the storage space of the main body unit  100 . The cover unit  300  may include a first cover  310  and a second cover  320 . The first cover  310  and the second cover  320  may have the same area or similar areas and be opened in opposite directions to each other. In an embodiment, the first cover  310  may be opened in a left direction, and the second cover  320  may be opened in a right direction. However, the embodiment of the present invention is not limited thereto. For example, the first cover  310  and the second cover  320  having the same area as each other may be disposed at upper and lower portions and opened to upper and lower sides, respectively. As the first cover  310  and the second cover  320  have the structures having the same area or similar areas and opened in opposite directions to each other as described above, when the frame unit  200  forms the support to support the main body unit, a center of gravity may be prevented from being biased. 
     The moving wheel  400  may be provided on a bottom surface of the luggage  10 . In an embodiment, the moving wheel  400  disposed at a rear surface side of the luggage  10  may be disposed at a lower end of the second frame  220 . Thus, when the frame unit  200  forms the support, the lower end of the second frame  220  may slide through the moving wheel  400  to further easily form the support. 
       FIG. 2  is an exploded perspective view illustrating the luggage with the support according to an embodiment of the present invention. 
     The frame unit  200  according to an embodiment of the present invention may form the support as the first frame  210  and the second frame  220  form an X-shape. The above-described configuration of the first frame  210  and the second frame  220  to form the support will be described in detail with reference to  FIG. 2 . Although  FIG. 2  illustrates, as an embodiment of the present invention, a structure including the first frame  210  including the connection part  211  and the fixing part  213  and the second frame  220  including the guide line  221  and the fixing groove  223 , alternatively, the first frame  210  may include the guide line  221  and the fixing groove  223 , and the second frame  220  may include the connection part  211  and the fixing part  213 . The first frame  210  may include the connection part  211 , the fixing part  213 , a locking groove  225 , and a control part  250 . The second frame  220  may include the guide line  221  and the fixing groove  223 . 
     The connection part  211 , as a member connecting the first frame  210  and the second frame  220 , may be fixed to an intermediate area of the first frame  210 . In an embodiment, the connection part  211  may have an end inserted to the guide line  221  of the second frame  220 , and the end may have a diameter greater than a width of the guide line  221  in order to prevent the second frame  220  from being separated from the first frame  210 . 
     The guide line  221  is disposed at an inner surface of the second frame  220 , which faces the first frame  210 , to guide a movement of the connection part  211 . The guide line  221  may be provided as a groove having a predetermined length so that the connection part  211  is movable therein. 
     The fixing part  213  is provided at a position adjacent to the connection part  211  and inserted to the fixing groove  223  to fix positions of the first frame  210  and the second frame  220  in a state of forming the support having the X-shape. As the fixing part  213  fixes the positions of the first frame  210  and the second frame  220 , a situation, in which the support is folded such that the first frame  210  moves along the guide line  221  of the second frame  220  in a reverse direction when the main body unit  100  of the luggage  10  is disposed on the support, may be prevented. The fixing part  213  has a shape capable of being inserted into or separated from the fixing groove  223  of the second frame  220 . In an embodiment, although the fixing part  213  may have a shape capable of being inserted into or separated from the fixing groove  223  as a spring is connected to one end of the fixing part  213 , the embodiment of the present invention is not limited thereto. 
     The fixing groove  223  is provided at a lower end side of the guide line  221  with respect to the second frame  220 . Thus, when the connection part  211  of the first frame  210  is disposed at a lower end of the guide line  221  of the second frame  220 , the fixing groove  223  may accommodate the fixing part  213  to fix the positions of the first frame  210  and the second frame  220 . 
     The locking groove  225  may be defined at the upper portion of the first frame  210  to accommodate the locking part  215  of the main body unit  100 . The locking part  215  of the main body unit  100  may have a shape capable of being inserted to and separated from the locking groove  225 . In an embodiment, although the locking part  215  may have a shape capable of being inserted into and separated from the locking groove  225  as a spring is connected to one end of the locking part  215  like the fixing part  213 , the embodiment of the present invention is not limited thereto. In case of the luggage not forming the support, the locking part  215  may be inserted to the locking groove  225  to prevent the frame unit  200  from being separated from the main body unit  100 . 
     The insertion and separation of the fixing part  213  with respect to the fixing groove  223  may be controlled by the control part  250 . Also, the insertion and separation of the locking part  215  with respect to the locking groove  225  may be controlled by the locking control part  150 . For example, the control part  250  may be provided as a button type. Here, when the button is pushed, the fixing part  213  may be separated from the fixing groove  223  and then move into the first frame  210 . The locking control part  150  may be also provided as a button type. Thus, when the button is pushed, the locking part  215  may be separated from the locking groove  225  and then move into the main body unit. The controlling of the fixing part  213  and the locking part  215  by the control part  250  and the locking control part  150  respectively will be described later in more detail with reference to  FIGS. 5 and 6 . 
     In an embodiment, the first frame  210  may include an outer frame  212  provided at each of both left and right sides of the rear surface of the main body unit  100  and an inner frame  214  inserted into the upper end of the outer frame  212  to vertically move and connecting the outer frame. In an embodiment, the vertical movement of the inner frame  214  may be controlled by a projection (not shown) provided to the inner frame  214  which is inserted into and separated from a projection accommodation groove (not shown) defined at an inner surface of the outer frame  212 . In this case, the insertion and separation of the projection (not shown) may be controlled by the control part  250  controlling the movement of the fixing part  213 . 
     In another embodiment, relationship between the outer frame  212  and the inner frame  214  may be formed the other way, contrary to  FIG. 2 . That is, a part generally used as a handle may be formed by the outer frame  212 , and the part represented as the outer frame  212  in  FIG. 2  may be formed as the inner frame  214 . In detail, the inner frame  214  may be provided at each of both left and right sides of the rear surface of the main body unit  100 , the outer frame  212  may be formed in a handle shape. The outer frame  212  may be formed to be vertically movable having the inner frame  214  inside the outer frame  212 . 
     The cover unit  300  according to an embodiment of the present invention may include a first cover  310  and a second cover  320 , which have the same area or similar areas. Each of the first cover  310  and the second cover  320  may have a rectangular parallelepiped shape in which one side surface facing the main body unit  100  is opened. Thus, a load may be separately accommodated in the first cover  310  and the second cover  320  in addition to the main body unit  100  to exhibit an effect of further easily organizing and taking out accommodated objects. In an embodiment, a detachable closing part may be further provided on the opened one side surface of each of the first cover  310  and the second cover  320  to prevent the accommodated objects from falling out of the first cover  310  and the second cover  320 . Also, surfaces  311  and  321  at which the first cover  310  and the second cover  320  contact each other, may be provided as a detachable type. For example, although the contact surfaces  311  and  321  may be provided as a non-woven fabric type that is attachable to and detachable from any inner side surfaces of the first cover  310  and the second cover  320 , the embodiment of the present invention is not limited thereto. As described above, as the contact surfaces  311  and  321  of the first cover  310  and the second cover  320  are detachably provided, when a high volume object is accommodated in the main body unit  100 , the contact surfaces  311  and  321  of the first cover  310  and the second cover  320  may be separated to secure a sufficient space for the high volume object. A cover locking part  330  may be provided at each of front central portions of the first cover  310  and the second cover  320  so that the cover locking parts are coupled to each other. For example, although the cover locking part  330  may be provided as a buckle type that couples the first cover  310  and the second cover  320 , the embodiment of the present invention is not limited thereto. 
       FIG. 3  is a view illustrating a process of forming the support of the luggage according to an embodiment of the present invention, and  FIG. 4  is a usage state view illustrating the luggage with the support according to an embodiment of the present invention. The process of forming the support of the luggage will be sequentially described with reference to  FIGS. 3 and 4 . 
     Firstly, when a user intends to form the support of the luggage  10  according to an embodiment of the present invention, the user necessarily moves the upper portion of the first frame  210  apart from the main body unit  100  while pushing the locking control part  150 . In this case, while the locking part  215  inserted into the locking groove  225  is separated from the locking groove  225  by the control operation of pushing the locking control part  150  by the user, the upper portion of the first frame  210  may rotate away from the main body unit  100 . Thereafter, when the upper portion of the first frame  210  continuously rotates, as the connection part of the first frame  210  moves along the guide line  221  of the second frame  220 , a lower portion of the second frame  220  rotates away from the main body unit  100 . Thereafter, when the connection part of the first frame  210  is disposed at a lower end of the guide line  221  of the second frame  220  and does not move further, while the fixing part of the first frame  210  is inserted into the fixing groove  223  defined at a lower end side of the guide line  221 , the support having an ‘X’-shape formed by the first frame  210  and the second frame  220  is fixed. That is, the fixing part is blocked by the second frame  220  not to protrude from the first frame  210  when the connection part moves along the guide line  221 , and protrudes and is inserted into the fixing groove  223  when the connection part is disposed at the lower end of the guide line  221 . When the positions of the first frame  210  and the second frame  220  in a state in which the support is formed as described above are fixed, the user may hold and rotate an upper end of the first frame  210  so that the upper portion is disposed on the ground to form a structure in which the main body unit  100  of the luggage  10  is disposed on the support as illustrated in  FIG. 4 . In this case, since the structure in which the main body unit  100  of the luggage  10  is disposed on the support may be realized by the principle of the lever, the above-described structure may be realized by using a much less force in comparison with the related art that lifts and positions a luggage on a separate support. 
       FIG. 5  is a view for explaining a position of the fixing part according to an operation of the control part according to an embodiment of the present invention.  FIG. 5  is a view for explaining the position of the fixing part according to the operation of the control part and illustrated excluding a component that is not related to the position of the fixing part according to the operation of the control part. Also, although a spring is provided at one end of the fixing part  213  for left and right movements of the fixing part  213  in  FIG. 5 , the embodiment of the present invention is not limited thereto. For example, any structure capable of moving the fixing part  213  in left and right directions according to the operation of the control part  250  is acceptable. 
     Specifically,  FIG. 5A  is a view illustrating a position of the fixing part  213  when the support is not formed,  FIG. 5B  is a view illustrating a position of the fixing part  213  when the support is formed, and  FIG. 5C  is a view illustrating a position of the fixing part  213  when the control part operates to fold the support after the support is formed. 
     That is, the fixing part  213  is in a compressed state blocked by the second frame  220  when the support is not formed, as illustrated in  FIG. 5A , and the fixing part  213  in the compressed state as in  FIG. 5A  moves toward the fixing groove  223  in a process of forming the support. When the support is completely formed, the fixing part  213  is positioned corresponding to the fixing groove  223  having a space to which the fixing part  213  is inserted as illustrated in  FIG. 5B , and then automatically inserted into the fixing groove  223  to fix the X-shape formed by the first frame  210  and the second frame  220 . When the first frame  210  and the second frame  220  are intended to be disposed at the rear surface of the main body unit by folding the support again, the control part  250  may operate to control the fixing part  213  to be separated from the fixing groove  223  as illustrated in  FIG. 5C . In an embodiment, the control part  250  may have an arbitrary button shape, and while the spring provided at one end of the fixing part  213  is compressed by an operation of pushing the control part  250 , the fixing part  213  may be taken out and separated from the fixing groove  223 . 
       FIG. 6  is a view for explaining a position of the locking part according to an operation of the locking control part  150  according to an embodiment of the present invention. Although a spring is provided at one end of the locking part  215  for left and right movements of the locking part  215  in  FIG. 6 , the embodiment of the present invention is not limited thereto. For example, any structure capable of moving the locking part  215  in left and right directions according to the operation of the locking control part  150  is acceptable. 
     Specifically,  FIG. 6A  is a view illustrating a position of the locking part  215  during a normal movement time, i.e., a state in which the first frame  210  and the second frame  220  are fixed to the rear surface of the main body unit, and  FIG. 6B  is a view illustrating a position of the locking part  215  in a state in which a locking state is released by operating the locking control part to form the support. 
     That is, in a normal movement time, as illustrated in  FIG. 6A , the locking part  215  provided at an upper portion of the main body unit is inserted to the locking groove  225  of the first frame  210  and fixes the first frame  210  to the main body unit to prevent the frame unit from being separated from the main body unit. In case of forming the support, as illustrated in  FIG. 6B , the locking control part  150  may operate to control the locking part  215  to be separated from the locking groove  225 . In an embodiment, the locking control part  150  may have an arbitrary button shape, and while the spring provided at one end of the locking part  215  is compressed by an operation of pushing the locking control part  150  having the button shape, the locking part  215  may be taken out and separated from the locking groove. Thus, a locking state of the locking part  215  may be released, and the first frame  210  and the second frame  220  may rotate in opposite directions to be away from the main body unit. 
       FIGS. 7 and 8  are views for explaining a process of forming a support of a frame unit according to another embodiment of the present invention. As illustrated in  FIGS. 7 and 8 , a second frame  220  of a frame unit according to another embodiment of the present invention may further include an auxiliary frame  230  provided at one side of the second frame  220  to extend the second frame  220 . In this case, as described above in  FIG. 2 , as an inner frame  214  is inserted into an outer frame  212  to vertically move, a first frame  210  is adjustable in length. As described above, as the frame of the frame unit has an extendable length, the support may have a higher height even in case of a luggage having a small size and a short frame length. 
       FIG. 7  is a view illustrating a first embodiment of the extendable second frame  220 , and  FIG. 8  is a view illustrating a second embodiment of the extendable second frame  220 . When the first frame  210  and the second frame  220  form the support in  FIGS. 7 and 8 , a fixing pin may be fixed to an area, in which the first frame  210  and the second frame  220  contact each other, so that the first frame  210  and the second frame  220  are connected. Thus, the first frame  210  and the second frame  220  may rotate around the fixing pin as an axis to form the support. 
     As illustrated in  FIG. 7 , the auxiliary frame  230  according to the first embodiment may be connected to one end of the second frame  220  through a hinge  233 , and move along a rail  231  provided on a rear surface of the main body unit.  FIG. 7A  is a view illustrating a structure of the second frame  220  and the auxiliary frame  230  in case of not forming the support, and  FIG. 7B  is a view illustrating a structure of the second frame  220  and the auxiliary frame  230  in case of forming the support. In case of not forming the support, as illustrated in  FIG. 7A , the second frame  220  and the auxiliary frame  230  in a state folded by the hinge are accommodated in an accommodation groove defined in the rear surface of the main body unit. In case of forming the support, as the auxiliary frame  230  moves along the rail  231 , an angle between the auxiliary frame  230  and the second frame  220  may gradually increase, and, as the second frame  220  and the auxiliary frame  230  form a straight line as illustrated in  FIG. 7B , the support including the frame having an extended length may be formed. 
     As illustrated in  FIG. 8 , an auxiliary frame  230  according to the second embodiment may be inserted into a second frame  220  in a movable manner  FIG. 8A  is a view illustrating a structure of the second frame  220  and the auxiliary frame  230  in case of not forming a support, and  FIG. 8B  is a view illustrating a structure of the second frame  220  and the auxiliary frame  230  in case of forming the support. In case of not forming the support, as illustrated in  FIG. 8A , the auxiliary frame  230  may be inserted into the second frame  220 . In case of forming the support, the auxiliary frame  230  may move to protrude from an upper end of the second frame  220 , thereby forming the support including the frame having an extended length as illustrated in  FIG. 8B . In this case, the auxiliary frame  230  may further include a projection (not shown) disposed at a lower end side of the auxiliary frame  230 , and when the auxiliary frame  230  completely protrudes from the second frame  220  to form the extended frame, the projection (not shown) may protrude from the second frame  220  to prevent the auxiliary frame  230  from being unintentionally inserted into the second frame  220 . Thus, a control part (not shown) for controlling a movement of the projection so that the projection (not shown) is inserted into the auxiliary frame  230  when the auxiliary frame  230  is intentionally inserted into the second frame  220  may be further provided. 
       FIG. 9  is a view for explaining a process of forming a support of a frame unit according to another embodiment of the present invention. 
     As illustrated in  FIG. 9 , a second frame  220  may have one side moving along a rail part  235  provided at an upper portion of a main body unit.  FIG. 9A  is a view illustrating a position of the second frame  220  in case of not forming a support, and  FIG. 9B  is a view illustrating a position of the second frame  220  in case of forming the support. In this case, as one side of a first frame  210  rotates, one end of the second frame  220 , which is coupled with the rail part  235 , may move along the rail part  235  to form the support having an X-shape. Here, like the embodiments in  FIGS. 7 and 8 , when the first frame  210  and the second frame  220  form the support, a fixing pin may be fixed to an area, in which the first frame  210  and the second frame  220  contact each other, so that the first frame  210  and the second frame  220  are connected. When the support is formed as in  FIG. 9 , since the second frame  220  forms a height higher than that when the one end of the second frame  220  is fixed to an upper portion of a main body unit, the support may be formed with a higher height even without an auxiliary frame. In an embodiment, the second frame  220  may further include a coupling part, which is disposed at one side thereof and inserted to and separated from the main body unit, in order to fix a position of the second frame  220  in each cases of forming the support and not forming the support. In this case, the rail part  235  provided in the main body unit may further include a coupling groove which is defined at each of upper and lower ends thereof and to which the coupling part is inserted. 
       FIG. 10  is a view for explaining an operation of a coupling part  270  according to an operation of a coupling control part  265  in the embodiment in  FIG. 9 . Although a spring is provided at one end of the coupling part  270  for left and right movements of the coupling part  270  in  FIG. 10 , the embodiment of the present invention is not limited thereto. For example, any structure capable of moving the coupling part  270  in left and right directions according to an operation of the coupling control part  265  is acceptable. 
     As illustrated in  FIG. 10 , the second frame  220  may further include the coupling part  270  disposed at an upper end of the second frame  220  and capable of being inserted to and separated from the main body unit, and the rail part  235  may further include coupling grooves  281  and  282  which are defined at the upper and lower portions of the rail part  235 , respectively, and to which the coupling part  270  is inserted. The coupling part  270  may be inserted to the coupling groove  281  defined at the upper portion of the rail part  235  in case of not forming the support, and inserted to the coupling groove  282  defined at the lower portion of the rail part  235  in case of forming the support. A coupling control part  265  for controlling the coupling part  270  to be inserted to and separated from the coupling grooves  281  and  282  as described above may be provided at an upper end of the second frame  220 .  FIG. 10A  is a view illustrating a position of the coupling part  270  in a state in which the coupling control part  265  does not operate, and  FIG. 10B  is a view illustrating a position of the coupling part  270  in a state in which the coupling control part  265  operates. That is, in case of forming the support, the user may operate the coupling control part  265  as in  FIG. 10B  to separate the coupling part  270  from the coupling groove  281  defined at the upper portion of the rail part  235 . Also, when one end of the second frame  220  moves toward a lower end side of the rail part  235  to form the support, the coupling part  270  may be automatically inserted into the coupling groove  282  defined at the lower portion of the rail part  235  to fix a position of the support. Thereafter, in case of folding the support again, the user may operate the coupling control part  265  to separate the coupling part  270  from the coupling groove  282  defined at the lower portion of the rail part  235 . 
       FIG. 11  is a view for explaining a process of forming a support of a frame unit according to another embodiment of the present invention. 
     As illustrated in  FIG. 11 , a second frame  220  may have one side moving along a rail part  235  provided at an upper portion of a main body unit.  FIG. 11A  is a view illustrating a position of the second frame  220  in case of not forming a support, and  FIG. 11B  is a view illustrating a position of the second frame  220  in case of forming the support. Also, an auxiliary frame  230  may be provided to the second frame  220  and inserted into the second frame  220  in a movable manner. 
     As one side of a first frame  210  rotates, one end of the second frame  220 , which is coupled to a rail part  235 , may move along the rail part  235 , and then the auxiliary frame  230  inserted into the second frame  220  may protrude therefrom. Thus, the first frame  210  and the second frame  220  may form the support having an X-shape. 
     As illustrated in  FIG. 11 , since the second frame  220  forms a height higher than that when a structure of the rail part  235  or a structure of the auxiliary frame  230  is singly used by using the structures of the rail part  235  and the auxiliary frame together, there is an advantage in that the support has a higher height. Even in this case, as described through  FIG. 9 , the second frame  220  may further include a coupling part, which is disposed at one side thereof and inserted to and separated from the main body unit, and the rail part  235  provided in the main body unit may further include a coupling groove to which the coupling part is inserted. 
       FIG. 12  is a view for explaining an operation of the coupling part  270  in the embodiment of  FIG. 9 or 11 . Although a spring is provided at one end of the coupling part  270  for left and right movements of the coupling part  270  in  FIG. 12 , the embodiment of the present invention is not limited thereto. For example, any structure capable of moving the coupling part  270  in left and right directions is acceptable. Although the coupling part  270  moves by the operation of the coupling control part  265  in  FIG. 10 , the coupling part  270  may move by the locking control part  150 , the control part  250 , or an additional control component, which are not shown in the drawing, in  FIG. 12 . Also, although not shown in  FIG. 12 , the coupling part  270  may move by the operation of the coupling control part  265  in the same manner as shown in  FIG. 10 . 
     According to an embodiment, as illustrated in  FIG. 12 , the second frame may further include a coupling groove  281  which is defined at one side of the second frame  220  and to which a coupling part  270  is inserted, and the rail part  235  provided in the main body unit may further include a coupling part  270  disposed at each of upper and lower ends of the rail part  235  and capable of being inserted to and separated from the coupling groove  281  of the second frame  220 . The coupling part  270  provided at the upper portion of the rail part  235  may be inserted into the coupling groove  281  in case of not forming the support. In case of forming the support, the coupling part  270  provided at the lower end of the rail part  235  may be inserted into the coupling groove  281  as the second frame  220  moves along the rail part  235 .  FIG. 12A  is a view illustrating a case when the second frame  220  is disposed at an original position without moving along the rail part  235 , i.e., a case of not forming the support, and  FIG. 12B  is a view illustrating a case when the second frame  220  moves along the rail part  235 , i.e., a case of forming the support. 
     According to an embodiment, as in the embodiments described above with reference to  FIG. 9  or  FIG. 11 , when the second frame  220  includes auxiliary frame  230  for extension of the second frame  220 , the coupling part  270  in  FIG. 10  and the coupling groove  281  in  FIG. 12  may be formed on the auxiliary frame  230 . 
     As described above, the coupling part  270  in  FIG. 12  may be controlled by the locking control part  150 , the control part  250 , the coupling control part  265 , or an additional control component, and as the user operates one of the above-described components, the coupling part  270  may be separated from or inserted to the coupling groove  281 . 
     All of the above-described features according to the embodiments in  FIGS. 1 to 6  may be applied to the above-described other embodiments in  FIGS. 7 to 12 . 
     Although the exemplary embodiments of the present invention have been described, it is understood that the present invention should not be limited to these exemplary embodiments but various changes and modifications can be made by one ordinary skilled in the art within the spirit and scope of the present invention as hereinafter claimed. Thus, the above-disclosed embodiments are to be considered illustrative and not restrictive.