Patent Publication Number: US-11029035-B2

Title: Oven

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority under 35 U.S.C. 119 and 35 U.S.C. 365 to Korean Patent Application No. 10-2018-0038644, filed on Apr. 3, 2018, which is hereby incorporated by reference in its entirety. 
     FIELD 
     The present invention relates to an oven with a door. 
     BACKGROUND 
     In general, an oven can cook by heating food in its closed cooking space. Accordingly, the oven may have a body having a cooking space and a door for closing the body. 
     The door can be hinged to selectively open or close the cooking space. 
     The door can be formed in a pull-down type in which the door is hinged to the lower end of the body to open/close the cooking space and a side-swing type in which the door is hinged to a side end of the body to open/close the cooking space. 
     The pull-down type door (hereafter, a pull-down door) has a problem that it interferes with the user when it is open. For example, the pull-down door is inconvenient because a user has to obliquely put food into the cooking space from the side of the oven, which Further, a user has to clean the inside of the oven in an inconvenient position. 
     The side-swing type door (hereafter, a side-swing door) can solve the problems of the pull-down door, but it also has a problem that it cannot provide the function of a temporal shelve that the pull-down door can provide. For example, according to the side-swing door, it is difficult for disabled users, children, and old people etc. to carry heavy food to the cooking space. 
     In the related art, oven doors have been disclosed in the following documents. 
     1. Korean Patent Application Publication No. 10-2013-0011486 (published on Jan. 30, 2013, titled “Oven door”) 
     2. Korean Patent Application Publication No. 10-2016-0111206 (published on Sep. 26, 2016, titled “Hinge apparatus and oven with hinge) 
     SUMMARY 
     The present invention has been made in an effort to solve the problems and an object of the present invention is to provide an oven allowing a user to select door-opening types. 
     Another object of the present invention is to provide an oven allowing a user to easily change door-opening types. In particular, another object of the present invention is to provide an oven allowing a user to easily switch a pull-down type and a side-swing type. 
     Another object of the present invention is to provide an oven having a door that can be opened in two directions. 
     Another object of the present invention is to provide an oven capable of providing both of a pull-down door and a side-swing door. 
     An oven according to an embodiment of the present invention may include: a cabinet having a cooking space open forward; a door rotating to open/close the cooking space; and a rotary hinge disposed on the front of the cabinet to rotate the door in various directions. 
     The door includes: a first ink moving in a first direction; and a second link moving in a second direction perpendicular to the first direction by movement of the first link, and the rotational direction of the door depends on movement of the first link. 
     An oven according to another embodiment of the present invention includes: a cabinet having a cooking space open forward; a door rotating to open/close the cooking space; and a rotary hinge disposed on the cabinet to rotate the door in various directions, in which the door includes: a first ink moving in a first direction; and a second link moving in a second direction perpendicular to the first direction by movement of the first link, and the door opens/closes the cooking space selectively in any one of a first mode in which the door is rotated about a side end of the cabinet a second mode in which the door is rotated about the lower end of the cabinet, depending on movement of the first link. 
     The ovens having the configurations according to embodiments of the present invention have the following effects. 
     First, a user can select the opening type of the door, so the oven is more useful. 
     Second, since both of a pull-down type and a side-swing type are provided for the ovens, the ovens can be more conveniently used. 
     Third, since the opening type of the door is selectively changed, the ovens can be more useful. 
     Fourth, since a user can easily switch the opening types of the door through the operation unit, it is easy to use the ovens. 
     Fifth, according to the present invention, it is possible to more easily carry food and clean the ovens, as compared with existing ovens, so the functionality is improved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing the external appearance of an oven according to an embodiment of the present invention. 
         FIG. 2  is a view showing that a door according to an embodiment of the present invention is opened in a first mode. 
         FIG. 3  is a perspective view showing the first mode of the door according to an embodiment of the preset invention. 
         FIG. 4  is a view showing the connection relationships between some components and a body according to an embodiment of the present invention. 
         FIG. 5  is an enlarged view showing a rotary hinge according to an embodiment of the present invention. 
         FIG. 6  is a view showing the connection state when the door according to an embodiment of the present invention is in the first mode. 
         FIGS. 7A and 7B  are enlarged plan views exemplarily showing that the part ‘A’ of  FIG. 6  is changed into the first mode. 
         FIGS. 8A and 8B  are enlarged front views exemplarily showing that the part ‘A’ of  FIG. 6  is changed into the first mode. 
         FIGS. 9A and 9B  are enlarged views exemplarily showing that the part ‘A’ of  FIG. 6  is changed into the first mode. 
         FIGS. 10A and 10B  are enlarged views exemplarily showing that the part ‘C’ of  FIG. 6  is changed into the first mode. 
         FIG. 11  is a view showing that a door according to an embodiment of the present invention is opened in a second mode. 
         FIG. 12  is a perspective view showing the second mode of the door according to an embodiment of the preset invention. 
         FIG. 13  is a view showing the connection state when the door according to an embodiment of the present invention is in the second mode. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. 
     In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific preferred embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical structural, mechanical, electrical, and chemical changes may be made without departing from the spirit or scope of the invention. To avoid detail not necessary to enable those skilled in the art to practice the invention, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense. 
     Also, in the description of embodiments, terms such as first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). 
       FIG. 1  is a perspective view showing the external appearance of an oven according to an embodiment of the present invention and  FIG. 2  is a view showing that a door according to an embodiment of the present invention is opened in a first mode. 
     Referring to  FIGS. 1 and 2 , an oven  1  according to an embodiment of the present invention may include a body  10  having an internal cooking space  12  and a door  20  attached to the front of the body  10  and being capable of opening/closing to selectively open the cooking space  12 . 
     In an embodiment of the present invention, the door  20  can provide both of a pull-down type and a side-swing type. 
     It is determined as a first mode of the door  20  when the side-swing type is selected and it is determined as a second mode of the door  20  when the pull-down type is selected. 
     That is, the door  20  can be rotated to open/close the cooking space  12  selectively in any one of the first mode in which it is rotated about a side end of the body  10  and the second mode in which it is rotated about the lower end of the body  10 . 
     The body  10  may include a hexahedral cabinet  11  forming the cooking space  12  that is open forward. Obviously, the body  10  may further include an out case (not shown) forming the external appearance of the oven  1  by covering the cabinet  11 . 
     The cabinet  11  may include a plurality of plates. For example, the cabinet  11  may include a lower plate forming the bottom, side plates extending upward respectively from both sides of the lower plate, an upper plate covering the tops of the side plates, and a rear plate extending from the rear end of the lower plate to the upper plate. 
     The cooking space  12  can be defined by the plates. That is, the internal space formed by the plates can be defined as the cooking space  12 . Accordingly, the cooking space  12  can be opened forward. 
     The opening direction of the internal space  12  of the cabinet  11  is defined as the forward direction with reference to  FIG. 2 . 
     The front of the cabinet  11  can be formed by front ends of the lower plate, the side plates, and the upper plate. The door can be rotatably coupled to the front of the cabinet  11 . Accordingly, the door  20  can open/close the front opening of the cabinet  11 , that is, the internal space  12 . 
     The body  10  may include a rotary hinge  110 , a fixed hinge  120 , and a coupling hinge  130  for coupling the door  20 . 
     The rotary hinge  110 , the fixed hinge  120 , and the coupling hinge  130  may be disposed on the front of the cabinet  11 . 
     The rotary hinge  110  may be coupled to a side of the lower end of the cabinet  11 . 
     The rotary hinge  110  may include a shaft for rotating the door  20  in the first mode and a shaft for rotating the door  20  in the second mode. That is, the rotary hinge  110  can rotate and guide the door  20  in multiple directions. The detailed configuration of the rotary hinge  110  will be described below. 
     The fixed hinge  120  may be spaced apart upward from the rotary hinge  110 . For example, the fixed hinge  120  may be disposed at a side of the upper end of the cabinet  11 . 
     The fixed hinge  120  may include a shaft protruding forward from the front of the cabinet  11  and extending downward. The fixed hinge  120  can be detachably coupled to a horizontal link  200  to be described below. 
     The shaft of the fixed hinge  120  can be considered as a shaft for rotating the door  20  in the first mode in cooperation with the rotary hinge  110 . 
     The coupling hinge  130  may be spaced apart laterally from the rotary hinge  110 . For example, the coupling hinge  130  may be disposed at the other side of the lower end of the cabinet  11 . The coupling hinge  130  can be detachably coupled to a vertical link  300  to be described below. 
     The rotary hinge  110  is referred to as a first hinge, the fixed hinge  120  is referred to as a second hinge, and the coupling hinge  130  is referred to as a third hinge. 
       FIG. 3  is a perspective view showing the first mode of the door according to an embodiment of the preset invention,  FIG. 4  is a view showing the connection relationships between some components and a body according to an embodiment of the present invention, and  FIG. 5  is an enlarged view showing a rotary hinge according to an embodiment of the present invention. In detail,  FIG. 3  is a perspective view showing the door in the first mode from the rear and  FIG. 4  is a view showing the assembly of the links and the cabinet with a door case removed. 
     Referring to  FIGS. 2 to 4 , the door  20  may include a door case  21  forming the external appearance of the door  20 , a handle  23  disposed on the door case  21 , and an operation unit  25  for switching the modes of the door  20 . 
     The door case  21  may be rotatably coupled to the first to third hinges. The door case  21  may be selectively coupled to the first to third hinges. 
     In the door case  21 , the front is a smooth plane and the rear has a space where the horizontal link  200  and the vertical link  300  are disposed. For example, the door case  21  may have a hexahedral shape with an open rear. 
     The door case  21  may have a side door groove  27  to which the fixed hinge  120  is coupled. The shaft of the fixed hinge  120  may be inserted and fixed in the side door groove  27 . 
     The side door groove  27  may be formed at a position corresponding tot eh position of the fixed hinge  120  coupled to the cabinet  11 . For example, the side door groove  27  may be a groove recessed forward at a side of the upper end of the door case  21 . A link groove  220  of the horizontal link  200  may be formed under the side door groove  27 . 
     The door case  21  may have a down door groove  28  in which the coupling hinge  130  is inserted. A coupling portion  136  of the coupling hinge  130  may be inserted in the down door groove  28 . Accordingly, the coupling portion  136  can be coupled to the lower end of the vertical link  300  by up-down movement of the vertical link  300 . 
     The handle  23  that a user can hold and the operation unit  25  for selecting the rotational direction of the door  20  may be disposed on the front of the door case  21 . 
     The operation unit  25  may be disposed in the handle  23 . For example, the operation unit  25  may be disposed through a side the handle  23 . The operation unit  25  may be operated in a button type. 
     Accordingly, a user can simply operate the operation unit  25  through the handle  23  that he/she holds to open/close the door  20 . 
     The operation unit  25  may include a button having a rectangular parallelepiped shape. For example, when a user initially presses the operation unit  25 , the operation unit  25  is pushed forward into the handle  23  and the door case  21 , thereby being able to press the horizontal link  200 . When the user presses again the operation unit  25 , the operation unit  25  protrudes backward, whereby the horizontal link  200  can be released. 
     That is, the operation unit  25  is operated by a user such the horizontal link  200  and the vertical link  300  are moved in predetermined directions. Accordingly, the user can simply select the first mode or the second mode of the door  20  by operating the operation unit  25 . 
     The door  20  may further include the horizontal link  200  that can be moved in a first direction and the vertical link  300  that can be moved in a second direction by movement of the horizontal link  200 . 
     The movement direction (first direction) of the horizontal link  200  may be perpendicular to the movement direction (second direction) of the vertical link  300 . For example, if the horizontal link  200  is move in both of left and right directions, the vertical link  300  can be moved up and down. 
     The horizontal direction of the door case  21  is defined as a first direction and the vertical direction of the door case  21  is defined as a second direction. 
     The rotational directions of the door  20 , that is, the modes of the door  20  can be selected by whether the horizontal link  20  is moved. 
     In detail, when the horizontal link  200  is moved to a side of the door case  21 , the fixed hinge  120  and the horizontal link  200  can be coupled to each other. Accordingly, the door  20  can open/close the cooking space  12  in the first mode in which it is rotated about a side end of the cabinet  11 . 
     When the horizontal link  200  is moved in the other lateral direction of the door case  21  and returned to the initial position, the fixed hinge  120  and the horizontal link  200  can be separated and the vertical link  300  and the coupling hinge  130  can be coupled to each other. Accordingly, it is possible to open/close the cooking space  12  in the second mode in which it is rotated about the lower of the cabinet  11 . 
     The horizontal link  200  and the vertical link  300  may have bars elongated in a predetermined direction on the rear of the door case  21 . 
     The horizontal link  200  may be elongated in both lateral directions of the door case  21 . The horizontal link  200  may be disposed on the upper end of the rear of the door case  21 . 
     The horizontal link  200  may have a link groove  220  and guide  210  that are formed at both ends, respectively. In detail, the link groove  220  may be formed at an end of the horizontal link  200  and the guide  210  may be formed at the other end of the horizontal link  200 . 
     The link groove  220  may be separably coupled to the fixed hinge  120 . For example, the link groove  220  is coupled to the fixed hinge  120  in the first mode and is separated from the fixed hinge  120  in the second mode. 
     In the first mode, the link groove  220  may be positioned under the side door groove  27 . The link groove  220  may be a round groove to receive the shaft of the fixed hinge  120 . 
     The horizontal link  200  can be moved by the operation unit  25 . For example, when a user initially presses the operation unit  25 , the operation unit  25  is pressed into the door case  21 , thereby being able to press the guide  210  of the horizontal link  200 . The pressing direction of the operation unit  25  may be perpendicular to the movement directions of the horizontal link  200  and the vertical link  300 . 
     That is, the guide  210  can be moved in the first direction by the force that is applied by the operation unit  25 . That is, the operation unit  25  can move the horizontal link  200  toward the sides of the door case  21  by pressing the guide  210 . 
     Further, the guide  25  can move the vertical link  300  in the second direction by pressing the upper end of the vertical link  300 . That is, the guide  210  can transmit force so that the vertical link  300  is moved up and down with respect to the door case  21 . 
     The guide  210  may be elongated such that the width is decreased toward the end. For example, the width of the end of the guide  210  may be smaller than the width of the center portion of the horizontal link  200 . Accordingly, a slope can be formed on the front of the guide  210 . 
     The guide may have a pressing portion  211  that comes in contact with the vertical link  300 , an inclined portion  215  that the operation unit  25  comes in contact with, and a stopping portion  217  to which the operation unit  25  is locked. 
     The pressing portion  211  may be positioned at the end of the guide  210 . The pressing portion  211  can transmit force to a slide slope  310  (described below) formed at the upper end of the vertical link  300  by coming in contact with the slide slope  310 . 
     That is, the pressing portion  211  can be laterally moved in contact with the slide slope  310 . Accordingly, the pressing portion  211  can laterally move while pushing down the inclined slide slope  310 . Accordingly, downward force can be applied to the vertical link  300 . 
     In detail, the pressing portion can transmit force while sliding on the slide slope  310 . For example, when the operation unit  25  pressing the horizontal link  200  is released, that is, the horizontal link  200  is moved in the other direction and returned to the initial position by elasticity, the pressing portion  211  can press down the vertical link  300  while sliding from the lowermost end to the uppermost end of the slide slope  310 . Therefore, the horizontal link  200  is returned to the initial position and the vertical line  300  is moved down. 
     On the contrary, when the horizontal link  200  is pressed and moved in a predetermined lateral direction by the operation unit  25 , the pressing portion  211  is moved in the direction and the force pressing the vertical link  300  is gradually removed, so the vertical link  300  can be moved up by elasticity. 
     The inclined portion  215  may be formed on the front of the guide  210 . For example, the inclined portion  215  may be formed such that the width of the guide  210  is decreased in the elongation direction. That is, the inclined portion  215  may be formed such that a portion of the front of the guide  210  is inclined inward toward the vertical link  300 . 
     When the operation unit  25  is pressed, it can transmit force while sliding on the inclined portion  215 . Accordingly, the horizontal link  200  can be moved by the force applied by sliding on the inclined portion  215 . 
     The stopping portion  217  may be vertically elongated forward from the inclined portion  215 . The stopping portion  217  may be formed in a shape corresponding to a side of the operation unit  25 . For example, the stopping portion  217  may be a surface protruding forward from an end, which is closer to the center of the horizontal link  200 , of the inclined portion  215 . 
     The stopping portion  217  prevents separation of the operation unit  25  moving on the inclined portion  215 . For example, when the operation unit  25  is returned outward, the force pressing the inclined portion  215  by the operation unit  25  is removed, so the horizontal link  200  can be returned to the initial position. Further, when the horizontal link  200  is returned to the initial position, the operation unit  25  can be locked by the stopping portion  217  with the side in contact with the stopping portion  217 . Accordingly, the horizontal link  200  can be returned to the fixed position. 
     The horizontal link  200  may further include a horizontal elastic member  250  providing elasticity for returning the horizontal link  200  and a horizontal mount  230  where the horizontal elastic member  250  is disposed. 
     The horizontal elastic member  230  may be disposed at the center portion of the horizontal link  200 . The horizontal mount  230  may be a space recessed inward. 
     The horizontal elastic member  250  may include a spring. The horizontal elastic member  250  may be disposed in the horizontal mount  230 . 
     The horizontal elastic member  250  can be stretched and contracted by movement of the horizontal link  200 . 
     The horizontal elastic member  250  can be contracted when the horizontal link  200  is moved in a predetermined direction toward the side door groove  27  of both lateral directions of the door case  21 . The elasticity accumulated by contraction of the horizontal elastic member  250  can be applied in the opposite direction of the movement direction of the horizontal link  200 . 
     Accordingly, when the horizontal link  200  pressed by the operation unit  25  is released, the horizontal link  200  is moved in the opposite direction toward the vertical link  300  by the elasticity of the horizontal elastic member  250 , whereby it can be returned to the initial position. 
     The vertical link  300  may be positioned perpendicular to the horizontal link  200 . That is, the vertical link  300  may be vertically positioned in contact with the horizontal link  200 . 
     The vertical link  300  may be elongated up and down with respect to the door case  21 . The vertical link  300  may be positioned at a side of the door case  21 . For example, the vertical link  300  may be positioned at the end of the door case  21  where the down door groove  28 , where the coupling hinge  130  is disposed, is formed. That is, the vertical link  300  may be positioned over the coupling hinge  130 . 
     The vertical link  300  may have the slide slope  310  that the horizontal link  200  comes in contact with and a coupling portion  320  separably coupled to the coupling hinge  130 . 
     The slide slope  310  may be formed at the upper end of the vertical link  300 . The slide slope  310  may be an inclined surface of the vertical link  300 . For example, the slide slope  310  may be a surface inclined downward toward the guide  210  of the horizontal link  200 . 
     That is, the slide slope  310  may be an inclined surface having a first end lower than a second end. The first end of the slide slope  310  can be considered as the end facing the horizontal link  200 . 
     Accordingly, when the guide  210  is moved from the first end to the second end of the slide slope  310 , the vertical ink  300  can be moved downward by the force applied to the inclined surface of the slide slope  310 . 
     The coupling portion  310  may be formed at the lower portion of the vertical link  300 . For example, the coupling portion  320  may be formed such that the coupling hinge  130  can be inserted into the vertical link  300  from the lower end of the vertical link  300 . 
     That is, the coupling portion  320  can be coupled to and decoupled from the coupling hinge  130 . For example, the coupling hinge  130  can be inserted in the coupling portion  320  in the second mode. 
     The vertical link  300  may further include a vertical elastic member  350  providing elasticity for returning the vertical link  300  and a vertical mount  330  where the vertical elastic member  350  is disposed. 
     The vertical mount  330  may be formed at the lower portion of the vertical link  300 . The vertical mount  330  may be a space recessed inward. 
     The vertical elastic member  350  may include a spring. The vertical elastic member  350  may be disposed in the vertical mount  330 . 
     The vertical elastic member  350  can be stretched and contracted by movement of the vertical link  300 . 
     The vertical elastic member  350  can be contracted when the vertical link  300  is moved down toward the down door groove  28  of both vertical directions of the door case  21 . 
     The elasticity of the vertical elastic member  350  can be applied upward opposite to the movement direction of the vertical link  300 . 
     Accordingly, when the horizontal link  200  is pressed by the operation unit  25 , the guide  210  slides down on the slide slope  310 , whereby the force pressing the slide slope  310  can be gradually decreased. 
     Accordingly, the vertical link  300  can be moved upward and returned to the initial position by the elasticity of the vertical elastic member  350 . Further, the vertical link  300  can be move upward and separated from the coupling hinge  130 . 
     The vertical elastic member  350  may be smaller in modulus of elasticity than the horizontal elastic member  250 . In detail, the horizontal link  200  can be returned to the initial position by the elasticity of the horizontal elastic member  250  and the elasticity can be transmitted to the slide slope  310 . 
     Accordingly, the vertical link  300  can be moved downward by the force that is transmitted to the slide slope  310  from the horizontal link  200 . The vertical elastic member  350  can be contracted. 
     That is, since the horizontal elastic member  250  is larger in modulus of elasticity than the vertical elastic member  350 , the elasticity of the horizontal elastic member  250  can be applied to the vertical link  300  against the reacting force of the contracted vertical elastic member  350 . 
     The horizontal link is referred to as a first link and the vertical link is referred to as a second link. 
     As described above, the coupling hinge  130  can be separably coupled to a vertical link  300 . 
     In detail, the coupling hinge  130  may have a coupling base  131  coupled to the cabinet  11 , a connecting portion  136  inserted in the coupling base  131  to be rotatable about the lower end of the cabinet  11 , and a down shaft  135  providing the rotary shaft for the coupling portion  136  by connecting the coupling base  131  and the coupling portion  136 . 
     The coupling base  131  may protrude forward from the cabinet  11  and inclined upward. A groove may be formed at the extending end of the coupling base  131  for rotation of the coupling portion  136 . 
     The coupling portion  136  can be inserted and fastened in the groove of the coupling base  131  by the down shaft  135 . 
     The down shaft  135  may be positioned in the extension direction of the lower end of the cabinet  11 . The coupling portion  136  can rotate on the down shaft  135 . That is, the coupling portion  136  can guide the door  20  such that the door  20  can be rotated in a pull-down type. 
     The coupling portion  136  may have a hexahedral bar. The upper end of the coupling portion  136  may be fastened or coupled to the coupling portion  320  of the vertical link  300 . For example, the coupling portion  135  can be coupled to the coupling portion  320  when the vertical link  300  is moved downward and can be separated from the coupling portion  320  when the vertical link  300  is moved upward. 
     As described above, the rotary hinge  110  can be coupled to fix and support the door  200  and may allow the door  20  to rotate different direction, depending on the first mode and the second mode. 
     In detail, referring to  FIG. 5 , the rotary hinge  110  may have a coupling base  111  having the same shape as the coupling base  131  of the coupling hinge  130 . 
     The coupling base  111  of the rotary hinge  110  may protrude forward from the front of the cabinet  11 . 
     The rotary hinge  110  may further have a rotary rib  116  inserted in the coupling base  111  to be rotatable about the lower end of the cabinet  11 , a down shaft  115  providing a rotary shaft for the rotary rib  116  by connecting the rotary rib  116  and the coupling base  111 , and a side shaft  118  extending upward from the rotary rib  116  and coupled to the door case  21 . 
     The coupling base  111  of the rotary hinge  110  is referred to as a first coupling base and the coupling base  131  of the coupling hinge  130  is referred to as a second coupling base. The down shaft  115  of the rotary hinge  110  is referred to as a first down shaft and the down shaft  135  of the coupling hinge  130  is referred to as a second down shaft. 
     The rotary rib  116  can rotate about the first down shaft  115 . That is, the rotary rib  116  can guide the door  20  in cooperation with the coupling portion  136  such that the door  20  can be rotated in a pull-down type. 
     The rotary rib  116  may be formed in an L-shape. The lower end of the rotary rib  116  can be inserted in the groove of the first coupling base  111  and fastened by the first down shaft  115 . 
     The side shaft  118  may extend upward from the top of the rotary rib  116 . That is, the side shaft  118  and the first down shaft  115  may be perpendicular to each other. 
     The side shaft  118  may be inserted and fixed in the lower end of the door case  21 . The side shaft  118  can guide the door in cooperation with the shaft of the fixed hinge  120  such that the door  20  can be rotated in a side-swing type. 
       FIG. 6  is a view showing the connection state when the door according to an embodiment of the present invention is in the first mode,  FIGS. 7A and 7B  are enlarged plan views exemplarily showing that the part ‘A’ of  FIG. 6  is changed into the first mode,  FIGS. 8A and 8B  are enlarged front views exemplarily showing that the part ‘A’ of  FIG. 6  is changed into the first mode,  FIGS. 9A and 9B  are enlarged views exemplarily showing that the part ‘A’ of  FIG. 6  is changed into the first mode, and  FIGS. 10A and 10B  are enlarged views exemplarily showing that the part ‘C’ of  FIG. 6  is changed into the first mode. 
     The operation of making the door  20  enter the first mode is described with reference to  FIGS. 6 to 10B . In detail,  FIGS. 7A, 8A, 9A, and 10A  show the connection state of the horizontal link  200  and the vertical link  300  when the door  20  is in the second mode (a pull-down type). In detail,  FIGS. 7B, 8B, 9B, and 10B  show the connection state of the horizontal link  200  and the vertical link  300  when the door  20  is in the first mode (a side-swing type). 
     Accordingly, the operation of changing into the first mode from the second mode is described with reference to  FIGS. 7A to 10B , and the operation of changing into the second mode from the first mode is described with reference to the reverse of the previous process. 
     Referring to  FIGS. 7A, 7B, 8A, and 8B , a user can press the operation unit  25  with the handle  23  in his/her hand. The operation unit  25  is pressed backward in the direction F in which the force applied by the user acts, thereby being able to press the inclined portion  215 . For example, an edge of the operation unit  25  can press the portion of the stopping portion  217  that it initially comes in contact with, that is, can press the forefront end of the inclined portion  215 . 
     The inclined portion  215  can be moved in a predetermined direction by the operation unit  25 . That is, the point of application by the operation unit  25  coming in contact with the inclined portion  215  continuously changes in the inclined direction of the inclined portion  215  from an end to the other end of the inclined portion  215 . 
     Accordingly, the horizontal link  200  is moved in one direction H of both lateral directions of the door case  21 . 
     The pressing portion  211  is also moved in the direction H, so the pressing portion  211  slides from the top to the bottom of the slide slope  310 . 
     The pressing portion  211  can be easily moved in the direction H by the inclination of the slide slope  310 , so the force pressing down the slide slope  310  can be gradually decreased. 
     Accordingly, the elasticity accumulated by contraction of the vertical elastic member  350  becomes larger than the force pressing down the slide slope  310 , so the vertical link  300  can be moved upward V. 
     Referring to  FIGS. 9A and 9B , when the horizontal link  200  is moved in the direction H, the link groove  220  can be positioned under the side door groove  27  in which the fixed hinge  120  inserted. The link groove  220  can be connected to the outer side of the fixed hinge  120 . 
     Furthermore, referring to  FIGS. 10A and 10B , as the vertical link  300  is moved upward, the coupling portion  320  and the coupling hinge  130  can be separated from each other. Accordingly, the lower end of the vertical link  300  can be completely separated from the coupling hinge  130 . 
     Therefore, the door  20  enters the first mode in which it can be rotated about the fixed hinge  120  and the side shaft  118 . 
       FIG. 11  is a view showing that a door according to an embodiment of the present invention is opened in a second mode,  FIG. 12  is a perspective view showing the second mode of the door according to an embodiment of the preset invention, and FIG. is a view showing the connection state when the door according to an embodiment of the present invention is in the second mode. 
     The operation of changing the door  20  into the second mode from the first mode is described with reference to  FIGS. 11 to 13  and the reverse of the process of entering the first mode. 
     As described above, when the horizontal link  200  is moved in the direction H, the horizontal elastic member  250  can be contracted. 
     When a user releases the pressed operation unit  25 , the operation unit  25  can protrude backward. 
     Accordingly, the force pressing the horizontal link  200  by the operation unit  25  is removed, so the horizontal link  200  can be moved in the other direction opposite to the direction H by the elasticity of the horizontal elastic member  250 . That is, the link groove  220  and the fixed hinge  120  are separated from each other and the horizontal link  200  can be returned to the initial position. 
     The door  20  can be changed into the second mode from the first mode. 
     In detail, as the horizontal link  200  is returned, the pressing portion  211  can also be moved in the other direction. As the pressing portion  211  is moved, force is obliquely applied to the sliding slope  310  that has come in contact with the bottom of the pressing portion  211  in the first mode. 
     The pressing portion  211  can continuously transmit force by sliding on the slide slope  310  from the bottom to the top of the sliding slope  310 . Accordingly, the vertical link  300  can be moved downward by the pressing portion moving on the slope. 
     AS the vertical link  300  is moved downward, the vertical elastic member  350  can be contracted. Further, the coupling hinge  130  can be inserted back into the coupling portion  320 . 
     Therefore, the door  20  enters the second mode in which it can be rotated about the rotary hinge  110  and the down shafts  115  and  135  of the coupling hinge  130 . 
     The horizontal elastic member  250  is referred to as a first elastic member and the vertical elastic member  350  is referred to as a second elastic member. 
     Even though all the elements of the embodiments are coupled into one or operated in the combined state, the present disclosure is not limited to such an embodiment. That is, all the elements may be selectively combined with each other without departing the scope of the invention. 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 have) only those elements, or it may comprise (or include or have) other elements as well as those elements if there is no specific limitation. Unless otherwise specifically defined herein, all terms comprising technical or scientific terms are to be given meanings understood by those skilled in the art. Like terms defined in dictionaries, generally used terms needs to be construed as meaning used in technical contexts and are not construed as ideal or excessively formal meanings unless otherwise clearly defined herein. 
     Although embodiments have been described with reference to a number of illustrative 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 invention as defined by the appended claims. Therefore, the preferred embodiments should be considered in descriptive sense only and not for purposes of limitation, and also the technical scope of the invention is not limited to the embodiments. Furthermore, is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being comprised in the present disclosure.