Cooking apparatus

Abstract

The cooking apparatus may comprise a main body including a cooking chamber, a door movable between a first state in which the cooking chamber is closed and a second state in which the cooking chamber is opened, and a latch device. The door includes a middle portion, an upper portion, and a lower portion. The latch device includes a first locking member provided in the middle portion of the door, and a second locking member provided in the main body and including an inclined portion. As the door moves from the second state to the first state, the middle portion moves toward the cooking chamber, the upper portion and the lower portion are unfolded with respect to the middle portion, and the first locking member contacts and engages with the second locking member so that the door is constrained on the main body.

Description

Cooking appliances

[0001] The present disclosure relates to a cooking appliance.

[0002] A cooking appliance refers to a device designed to heat and cook a target object, such as food, and capable of providing various cooking-related functions, such as heating, thawing, drying, and sterilization of the target object. Examples of such cooking appliances include ovens (such as gas ovens or electric ovens), microwave heating devices (hereinafter referred to as microwaves), gas ranges, electric ranges, over-the-range (OTR) ranges, gas grills, or electric grills.

[0003] An oven is a device that cooks food by directly transferring heat to the food or heating the interior of the cooking chamber through a heat-generating source, such as a heater. A microwave oven is a device that cooks food using intermolecular frictional heat generated by disrupting the molecular arrangement of food with high-frequency waves as a heating source.

[0004] The cooking appliance includes a cooking chamber for cooking food and a door provided to open and close the cooking chamber.

[0005] One aspect of the present disclosure provides a cooking appliance with improved ease of use.

[0006] One aspect of the present disclosure provides a cooking appliance having an improved door.

[0007] One aspect of the present disclosure provides a cooking appliance having a foldable door.

[0008] One aspect of the present disclosure provides a cooking appliance with an easy-to-maintain door.

[0009] One aspect of the present disclosure provides a cooking appliance that can prevent a gap from occurring between the cooking chamber and the door.

[0010] One aspect of the present disclosure provides a cooking device that can prevent accidents such as a user's finger being pinched.

[0011] The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0012] A cooking appliance according to the concept of the present disclosure may include: a main body including a cooking chamber; a door movable between a first state of closing the cooking chamber and a second state of opening the cooking chamber, the door including a middle portion, an upper portion foldable with respect to the middle portion, and a lower portion foldable with respect to the middle portion; and a latch device. The latch device may include a first locking member provided on the middle portion of the door; and a second locking member provided on the main body and including an inclined portion. When the door is in the first state, the upper portion and the lower portion may be unfolded with respect to the middle portion. When the door is in the second state, the upper portion and the lower portion may be folded with respect to the middle portion. As the door moves from the second state to the first state, the middle portion can move toward the cooking chamber and the upper portion and the lower portion can be unfolded relative to the middle portion, and as the middle portion moves toward the cooking chamber, the first locking member contacts the inclined portion and moves along the inclined portion so as to engage with the second locking member when the door is in the first state, thereby allowing the door to be restrained to the main body.

[0013] A cooking appliance according to the concept of the present disclosure may include: a main body comprising a cooking chamber; a door switchable between a first state of closing the cooking chamber and a second state configured to be folded to open the cooking chamber; a guide rail mounted on the main body and extending in a vertical direction; a guide projection mounted on the door and configured to be movable along the guide rail; and a stopper mounted on the guide rail. The stopper may support the guide projection to restrict the guide projection from moving downward while the door is in the second state.

[0014] FIG. 1 is a perspective view showing the door of a cooking appliance closed according to one embodiment of the present disclosure.

[0015] FIG. 2 is a perspective view showing the door of a cooking appliance open according to one embodiment of the present disclosure.

[0016] FIG. 3 is a side cross-sectional view illustrating the door of a cooking appliance open according to one embodiment of the present disclosure.

[0017] FIG. 4 illustrates a view in which the door of a cooking appliance according to one embodiment of the present disclosure is separated from the main body.

[0018] FIG. 5 illustrates a case where a door according to one embodiment of the present disclosure is in a first state.

[0019] FIG. 6 illustrates a case where a door according to one embodiment of the present disclosure is in a second state.

[0020] FIG. 7 is an exploded view of a guide projection according to one embodiment of the present disclosure.

[0021] FIG. 8 illustrates a portion of a cooking device according to one embodiment of the present disclosure in a cross-section.

[0022] FIG. 9 illustrates a view in which a guide projection is separated from a guide rail when a door according to one embodiment of the present disclosure is in a first state.

[0023] FIG. 10 illustrates a guide projection being separated from a guide rail when a door according to one embodiment of the present disclosure is in a second state.

[0024] FIG. 11 is a side cross-sectional view of a door when the door according to one embodiment of the present disclosure is in a first state.

[0025] FIG. 12 is a side cross-sectional view of a door when the door is in a second state according to one embodiment of the present disclosure.

[0026] FIG. 13 illustrates an example of a first locking member of a latch device according to one embodiment of the present disclosure.

[0027] FIG. 14 illustrates an example of a second locking member of a latch device according to one embodiment of the present disclosure.

[0028] FIG. 15 schematically illustrates the state before the first locking member is coupled to the second locking member in a cooking device according to one embodiment of the present disclosure.

[0029] FIG. 16 schematically illustrates the state in which a first locking member is coupled to a second locking member in a cooking appliance according to one embodiment of the present disclosure.

[0030] FIG. 17 schematically illustrates a state in which a first locking member is coupled to a second locking member in a cooking appliance according to one embodiment of the present disclosure.

[0031] FIG. 18 schematically illustrates a state in which a first locking member coupled to a second locking member is pressed by a pressurizing member in a cooking device according to one embodiment of the present disclosure.

[0032] FIG. 19 illustrates an example of a first locking member of a latch device according to one embodiment of the present disclosure.

[0033] FIG. 20 illustrates an example of a second locking member of a latch device according to one embodiment of the present disclosure.

[0034] FIG. 21 schematically illustrates the state before the first locking member is coupled to the second locking member in a cooking device according to one embodiment of the present disclosure.

[0035] FIG. 22 schematically illustrates the state in which a first locking member is coupled to a second locking member in a cooking device according to one embodiment of the present disclosure.

[0036] FIG. 23 schematically illustrates a state in which a first locking member is coupled to a second locking member in a cooking appliance according to one embodiment of the present disclosure.

[0037] FIG. 24 is a rear perspective view of a cooking device according to one embodiment of the present disclosure.

[0038] FIG. 25 is a schematic perspective view illustrating a door locking device that operates to open a door according to one embodiment of the present disclosure.

[0039] FIG. 26 is a side cross-sectional view schematically illustrating a door locking device that operates to open a door according to one embodiment of the present disclosure.

[0040] FIG. 27 is a schematic diagram illustrating the appearance of a latch projection of a second locking member rotated by a door locking device to open a door according to one embodiment of the present disclosure.

[0041] FIG. 28 is a schematic perspective view illustrating a door locking device that operates to lock a door according to one embodiment of the present disclosure.

[0042] FIG. 29 is a side cross-sectional view schematically illustrating a door locking device that operates to lock a door according to one embodiment of the present disclosure.

[0043] FIG. 30 is a schematic diagram illustrating the restriction of rotation of a latch projection of a second locking member to lock a door according to one embodiment of the present disclosure.

[0044] FIG. 31 is a rear perspective view of a cooking device according to one embodiment of the present disclosure.

[0045] FIG. 32 is an exploded view of a door opening and closing device according to one embodiment of the present disclosure.

[0046] FIG. 33 schematically illustrates the state of a door opening and closing device according to one embodiment of the present disclosure before the door is opened.

[0047] FIG. 34 schematically illustrates the state of a door opening and closing device according to one embodiment of the present disclosure while opening a door.

[0048] FIG. 35 schematically illustrates a door opening and closing device according to one embodiment of the present disclosure in a state where the door is opened.

[0049] FIG. 36 is a control block diagram of a cooking device according to one embodiment of the present disclosure.

[0050] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0051] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0052] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0053] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0054] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0055] The terms "part," "module," and "component" may be implemented in hardware or software. Depending on the embodiments, a plurality of "parts," "modules," and "components" may be implemented as a single component, or a single "part," "module," or "component" may include a plurality of components.

[0056] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0057] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0058] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0059] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0060] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0061] Meanwhile, terms such as "front-rear direction," "front," "rear," "upper side," and "lower side" used in the following description are defined based on the drawings, and the shape and location of each component are not limited by these terms.

[0062] For example, as illustrated in FIGS. 1 to 3, the direction in which the door (30) of the cooking appliance (1) faces can be defined as the front (+X direction), and the opposite direction can be defined as the rear (-X direction).

[0063] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0064] FIG. 1 is a perspective view showing the door of a cooking appliance according to one embodiment of the present disclosure in a closed state. FIG. 2 is a perspective view showing the door of a cooking appliance according to one embodiment of the present disclosure in an open state. FIG. 3 is a side cross-sectional view showing the door of a cooking appliance according to one embodiment of the present disclosure in an open state.

[0065] Referring to FIGS. 1 to 3, the cooking device (1) may include a main body (10). The main body (10) may include a cooking chamber (20). The main body (10) may form a cooking chamber (20). Various components may be mounted and / or accommodated in the main body (10).

[0066] The main body (10) may include an outer case (11) and an inner case (12).

[0067] The outer case (11) may be positioned on the outside of the inner case (12). The outer case (11) may be positioned to surround the upper surface, lower surface, rear surface, left side, right side, etc. of the inner case (12) from the outside. The outer case (11) may form most of the exterior of the cooking device (1).

[0068] The inner case (12) can be placed on the inner side of the outer case (11). The inner case (12) can be accommodated inside the outer case (11). A cooking chamber (20) can be formed inside the inner case (12).

[0069] The inner case (12) can be coated to prevent corrosion caused by condensation that may occur during the steam condensation process or moisture contained in the food itself.

[0070] Insulating material may be provided between the outer case (11) and the inner case (12) to delay heat transfer from the inside to the outside of the cooking chamber (20).

[0071] The main body (10) may include a front frame (13). The front frame (13) may be provided in the front portion of the main body (10). The front frame (13) may form at least a portion of the front surface of the main body (10). The front frame (13) may cover at least a portion of the space between the outer case (11) and the inner case (12).

[0072] The cooking device (1) may include a cooking chamber (20). The cooking chamber (20) may be provided to accommodate food that requires cooking. Food accommodated in the cooking chamber (20) may be cooked. The cooking chamber (20) may be formed so that the front is open to allow food to be fed in and out. For example, the inner case (12) may be formed to have a box shape with the front approximately open.

[0073] The cooking device (1) may include a tray (22, see FIG. 3). The tray (22) may be configured to allow a cooking object to be placed on it. Food or a container containing food may be placed on the tray (22). The tray (22) can be inserted into the cooking chamber (20) and can be withdrawn from the cooking chamber (20).

[0074] The cooking device (1) may include a supporter (21) provided to support a tray (22). The tray (22) may be detachably mounted to the supporter (21). The tray (22) may be supported by the supporter (21) and placed in the cooking chamber (20). The supporter (21) may be formed on the side wall of the inner case (12). For example, the supporter (21) may protrude from the left inner wall and / or the right inner wall of the inner case (12).

[0075] Supporters (21) may be provided in multiple numbers. Multiple supporters (21) may be spaced apart in the vertical direction (Z direction). A tray (22) may be supported by any one of the multiple supporters (21), and the position of the tray (22) may be determined according to the position of the supporter (21) supporting the tray (22).

[0076] The cooking device (1) may include a heating device (not shown) configured to provide heat inside the cooking chamber (20). As an example, the heating device (not shown) may include a gas burner configured to generate heat by burning gas fuel. However, the type of heating device for heating food inside the cooking chamber (20) is not limited, and the cooking device (1) may include a magnetron (not shown) that emits electromagnetic waves into the cooking chamber (20) to generate heat by the rotation of water molecules inside the food.

[0077] The cooking device (1) may include a fan (not shown) provided to circulate air inside the cooking chamber (20). The fan can circulate air inside the cooking chamber (20) by rotating. As the air inside the cooking chamber (20) is circulated by the fan, the heat generated by the heating device can be evenly distributed inside the cooking chamber (20). Thus, food inside the cooking chamber (20) can be heated evenly. For example, the fan may be placed on the rear wall of the inner case (12), but the position of the fan is not limited to the example described above.

[0078] A cooking appliance (1) may include a user interface (60). The user interface (60) may be configured to receive user input or output information about the cooking appliance (1). The user interface (60) may include an input interface (61) for receiving user input to control the cooking appliance (1). For example, the input interface (61) may include a button and / or a knob. The user interface (60) may include an output interface (62) for displaying the status of the cooking appliance (1) to the user. For example, the output interface (62) may include a display.

[0079] The cooking appliance (1) may include a cooktop (50). The cooktop (50) may be configured to allow a cooking container containing food to be placed on it and to heat the placed cooking container. The cooktop (50) may be mounted on the main body (10). Specifically, the cooktop (50) may be mounted on the upper part of the main body (10). The cooktop (50) may form the upper surface of the cooking appliance (1). For example, the cooktop (50) may include an induction cooktop configured to heat a cooking container with an electromagnetic field induced by flowing a high-frequency current through a coil. For example, the cooktop (50) may include a gas burner cooktop that generates heat by burning gas fuel. The type of cooktop (50) is not limited.

[0080] The cooking device (1) may include a door (30). The door (30) may be provided to open and close the cooking chamber (20). The door (30) may cover the cooking chamber (20). The door (30) may be rotatably coupled to the main body (10). For example, the lower part of the door (30) may be rotatably coupled to the main body (10).

[0081] The door (30) may include a handle (34) configured to be grasped by a user. The user may open or close the door (30) using the handle (34). The handle (34) may be formed in the middle section (33) described later.

[0082] The door (30) may include an upper section (31), a lower section (32), and a middle section (33). The lower section (32) may be positioned below the upper section (31). The lower section (32) may be spaced downward from the upper section (31). The middle section (33) may be provided between the upper section (31) and the lower section (32). The middle section (33) may cover the space between the upper section (31) and the lower section (32).

[0083] For example, the upper section (31), lower section (32), and middle section (33) may be referred to as the first door section (31), the second door section (32), and the third door section (33), respectively. For example, the upper section (31), lower section (32), and middle section (33) may be referred to as the first door frame (31), the second door frame (32), and the third door frame (33), respectively. For example, the upper section (31), lower section (32), and middle section (33) may be referred to as the first door panel (31), the second door panel (32), and the third door panel (33), respectively.

[0084] The door (30) can be foldable. The upper part (31) can be configured to be foldable with respect to the middle part (33). The lower part (32) can be configured to be foldable with respect to the middle part (33). The door (30) can be referred to as a foldable door (30).

[0085] The door (30) can be configured to be switchable between a first state (S1) that closes the cooking room (20) and a second state (S2) that opens the cooking room (20).

[0086] While the door (30) is in the first state (S1), the door (30) can cover the cooking chamber (20). While the door (30) is in the first state (S1), the cooking chamber (20) may not be exposed outside the cooking appliance (1). While the door (30) is in the first state (S1), the door (30) may be in an unfolded state. While the door (30) is in the first state (S1), the upper part (31), the middle part (33), and the lower part (32) may be arranged side by side in a vertical direction.

[0087] While the door (30) is in the second state (S2), the door (30) may be configured to be folded to open the cooking chamber (20). While the door (30) is in the second state (S2), the cooking chamber (20) may be exposed to the outside of the cooking appliance (1). While the door (30) is in the second state (S2), the door (30) may be in a folded state. While the door (30) is in the second state (S2), the upper part (31) and the lower part (32) are each configured to be folded relative to the middle part (33), and the rear (31a) of the upper part (31) and the rear of the lower part (32a) may be positioned to face each other. While the door (30) is in the second state (S2), the rear (31a) of the upper part (31) and the rear of the lower part (32a) may be configured to form an acute angle. For example, while the door (30) is in the second state (S2), the angle between the lower part (32) and the vertical direction (Z direction) may be approximately 80 to 85 degrees. The rear surface (31a) of the upper part (31) and the rear surface of the lower part (32a) may be configured so as not to come into contact. For example, if the rear surface (31a) of the upper part (31) and the rear surface of the lower part (32a) come into contact, a large force may be required to lift the door (30) in the vertical direction (Z direction) when closing the door (30). However, according to the present disclosure, while the door (30) is in the second state (S2), the rear surface (31a) of the upper part (31) and the rear surface of the lower part (32a) are configured to form an acute angle, so the force required to convert the door (30) from the second state (S2) to the first state (S1) may be relatively small. That is, the user can easily close the door (30) with little force.

[0088] For example, referring to FIG. 3, while the door (30) is in a second state (S2), the upper portion (31) of the door (30) may be positioned below the lowest supporter (21a) among the plurality of supporters (21). While the door (30) is in a second state (S2), the uppermost portion of the upper portion (31) of the door (30) may be positioned below the upper surface (21aa) of the supporter (21a). Thus, when the door (30) is open, the tray (22) can be drawn into or taken out of the cooking chamber (20) without interfering with the door (30).

[0089] The cooking appliance (1) may include a hinge (40) connecting the main body (10) and the door (30). The hinge (40) may support the door (30) so that it can rotate relative to the main body (10). The hinge (40) may be connected to the main body (10) and the door (30), respectively. A hinge fixing part (41, see FIG. 4) to which the hinge (40) is fixed may be formed on the main body (10).

[0090] FIG. 4 illustrates a view in which the door of a cooking appliance according to one embodiment of the present disclosure is separated from the main body.

[0091] The cooking device (1) may include a guide rail (70). The guide rail (70) may be provided on the main body (10). The guide rail (70) may be detachably mounted on the main body (10). For example, the guide rail (70) may be detachably mounted on the front side of the outer case (11) of the main body (10). The guide rail (70) may extend in a vertical direction (Z direction). The guide rail (70) may be provided as a component of the main body (10), in which case the main body (10) may be considered to include the guide rail (70).

[0092] For example, the cooking device (1) may include a pair of guide rails (70). Each of the pair of guide rails (70) may be positioned to correspond to the left side of the main body (10) and the right side of the main body (10).

[0093] The cooking device (1) may include a guide projection (80). The guide projection (80) may be provided on the door (30). The guide projection (80) may be detachably mounted on the door (30). The guide projection (80) may be provided on the upper part (31). The guide projection (80) may be detachably mounted on the upper part (31). For example, a part of the guide projection (80) may be positioned inside the upper part (31) of the door (30), and the remainder of the guide projection (80) may be positioned outside the upper part (31) of the door (30). For example, a part of the guide projection (80) may be positioned inside the upper part (31) of the door (30), and the remainder of the guide projection (80) may protrude from the side of the upper part (31) of the door (30). The guide projection (80) may be provided as a component of the door (30), in which case the door (30) may be seen as including the guide projection (80).

[0094] For example, the cooking device (1) may include a pair of guide protrusions (80). Each of the pair of guide protrusions (80) may be positioned to correspond to the left side of the door (30) and the right side of the door (30).

[0095] Further details regarding the guide rail (70) and guide projection (80) will be described later.

[0096] The cooking device (1) may include a latch device (100) configured to selectively restrain the door (30) to the main body (10). When the door (30) closes the cooking chamber (20), the latch device (100) may restrain the door (30) to the main body (10). While the door (30) is in a second state (S2), the latch device (100) may be configured to lock the door (30) to the main body (10).

[0097] A part of the latch device (100) may be provided in the door (30), and the remainder of the latch device (100) may be provided in the main body (10). A part of the latch device (100) may be provided in the middle section (33) of the door (30), and the remainder of the latch device (100) may be provided in a part of the main body (10) corresponding to the middle section (33).

[0098] The latch device (100) may include a first locking member (110). The first locking member (110) may be provided in the middle portion (33) of the door (30). The first locking member (110) may be mounted in the middle portion (33) of the door (30). The first locking member (110) may be provided as a component of the door (30), in which case the door (30) may be seen as including the first locking member (110).

[0099] The latch device (100) may include a second locking member (120). The second locking member (120) may be provided in the main body (10). The second locking member (120) may be mounted on the main body (10). The second locking member (120) may be provided as a component of the main body (10), in which case the main body (10) may be considered to include the second locking member (120).

[0100] Further details regarding the latch device (100) will be described later.

[0101] A door hole (30h) may be formed on the rear side of the door (30). A first locking member (110) may protrude from the door (30) through the door hole (30h) (see FIGS. 15 to 17). Alternatively, a second locking member (120) may access the first locking member (110) through the door hole (30h) (see FIGS. 21 to 23).

[0102] A main body hole (13h) may be formed on the front of the main body (10). For example, the main body hole (13h) may be formed by penetrating the front frame (13). The first locking member (110) may access the second locking member (120) through the main body hole (13h) (see FIGS. 15 to 17). Alternatively, the second locking member (120) may protrude from the main body (10) through the main body hole (13h) (see FIGS. 21 to 23).

[0103] FIG. 5 illustrates a case where the door according to one embodiment of the present disclosure is in a first state. FIG. 6 illustrates a case where the door according to one embodiment of the present disclosure is in a second state. FIG. 7 is an exploded view of a guide projection according to one embodiment of the present disclosure. FIG. 8 illustrates a cutaway view of a part of a cooking device according to one embodiment of the present disclosure.

[0104] The guide projection (80) may be provided to be movable along the guide rail (70). The guide projection (80) may be provided to move along the extension direction of the guide rail (70). The guide projection (80) may be provided to move along the vertical direction (Z direction). The guide projection (80) may be provided to be movable relative to the guide rail (70). The guide projection (80) may be configured to be guided by the guide rail (70).

[0105] As the guide projection (80) moves along the guide rail (70), the door (30) can open or close the cooking chamber (20). As the guide projection (80) moves along the guide rail (70), the door (30) can switch between a first state (S1) and a second state (S2). As the guide projection (80) moves downward along the guide rail (70), the door (30) can open the cooking chamber (20). As the guide projection (80) moves upward along the guide rail (70), the door (30) can close the cooking chamber (20).

[0106] The guide projection (80) may include a holder (81). The holder (81) may be mounted on the door (30). The holder (81) may be detachably mounted on the upper portion (31) of the door (30). The holder (81) may be fixed to the upper portion (31) of the door (30).

[0107] For example, the holder (81) may include a first holder portion (811), a second holder portion (812), and a third holder portion (813). The first holder portion (811) may include a roughly hollow cylindrical shape. The first holder portion (811) may be placed inside the upper portion (31) of the door (30). The second holder portion (812) may be coupled to the first end of the first holder portion (811). The second holder portion (812) may be placed inside the upper portion (31) of the door (30). The third holder portion (813) may be coupled to the second end of the first holder portion (811) and the side of the upper portion (31) of the door (30). A portion of the third holder portion (813) may be placed outside the upper portion (31) of the door (30).

[0108] The guide projection (80) may include a spring (83). The spring (83) may be received in the holder (81). The spring (83) may have an elastic restoring force. The spring (83) may be configured to elastically bias the moving member (82) to be described later. The spring (83) may be configured to elastically bias the moving member (82) in a direction in which the moving member (82) protrudes toward the guide rail (70). For example, a contracted spring (83) may move the moving member (82) as it extends. The spring (83) may be referred to as a guide spring (83) to distinguish it from the springs (113, 127) to be described later.

[0109] The guide projection (80) may include a movable member (82). At least a portion of the movable member (82) may be received in the holder (81). The movable member (82) may protrude from the holder (81) or be inserted into the holder (81). The movable member (82) may be elastically biased by a spring (83) to protrude from the holder (81) or be arranged to be inserted into the holder (81) as it is pressed. The movable member (82) may include a spring pressing portion (821). As the movable member (82) is pressed, the movable member (82) moves in a direction to be inserted into the holder (81), and the spring pressing portion (821) may be arranged to press the spring (83). At this time, the spring (83) may contract. The movable member (82) may be arranged to be movable along an approximately horizontal direction (Y direction).

[0110] The guide projection (80) may include a holder opening (84). The holder opening (84) may be formed in the holder (81). The holder opening (84) may be formed in the third holder portion (813). The movable member (82) may protrude from the holder (81) through the holder opening (84) or be inserted into the holder (81) through the holder opening (84).

[0111] The guide rail (70) may include a rail body (71). The rail body (71) may form a rail groove (72) to be described later. The rail body (71) may include a bent shape to form the rail groove (72).

[0112] The guide rail (70) may include a rail groove (72). The rail groove (72) may extend along a vertical direction. The rail groove (72) may be provided to accommodate at least a portion of the guide projection (80). The rail groove (72) may be provided to accommodate a moving member (82). The moving member (82) may be provided to move along the rail groove (72) while being accommodated in the rail groove (72). The moving member (82) may be provided to be movable along a vertical direction (Z direction) in the rail groove (72).

[0113] The guide rail (70) may include a rail hole (73). The rail hole (73) may be formed by penetrating the rail body (71). At least a portion of the guide projection (80) may be exposed outside the main body (10) through the rail hole (73). The movable member (82) of the guide projection (80) may be exposed outside the main body (10) through the rail hole (73). The guide projection (80) may be configured to be accessible through the rail hole (73).

[0114] The guide projection (80) can receive an external force applied from outside the main body (10). For example, a user can press the movable member (82) by placing their hand or a tool into the rail hole (73). As the movable member (82) is pressed, the movable member (82) can be received inside the holder (81) while pressing the spring (83). As the external force applied to the guide projection (80) is removed, the spring (83) can elastically bias the movable member (82). The movable member (82) can protrude from the holder (81) toward the guide rail (70) by the spring (83).

[0115] For example, the guide projection (80) may include a plurality of rail holes (73). The guide projection (80) may include a first rail hole (731, see FIG. 5) and a second rail hole (732, see FIG. 6). The second rail hole (732) may be positioned below the first rail hole (731). The second rail hole (732) may be spaced downward from the first rail hole (731).

[0116] When the door (30) is in the first state (S1), the guide projection (80) may correspond to the first rail hole (731). When the door (30) is in the first state (S1), the moving member (82) may be exposed to the outside of the main body (10) through the first rail hole (731). When the door (30) is in the first state (S1), the moving member (82) may be configured to be accessible through the first rail hole (731).

[0117] When the door (30) is in the second state (S2), the guide projection (80) may correspond to the second rail hole (732). When the door (30) is in the second state (S2), the moving member (82) may be exposed to the outside of the main body (10) through the second rail hole (732). When the door (30) is in the second state (S2), the moving member (82) may be configured to be accessible through the second rail hole (732).

[0118] The cooking device (1) may include a stopper (90, see FIG. 6). The stopper (90) may be mounted on a guide rail (70). The stopper (90) may support the guide projection (80) to restrict the downward movement of the guide projection (80) while the door (30) is open to the cooking chamber (20). The stopper (90) may support the guide projection (80) to restrict the downward movement of the guide projection (80) while the door (30) is in a second state (S2). The stopper (90) may be configured to contact the guide projection (80). The stopper (90) may be configured to support a moving member (82) of the guide projection (80). The stopper (90) can support the guide projection (80) provided on the upper part (31) so that the upper part (31) and the lower part (32) can maintain a constant acute angle when the door (30) is opened.

[0119] For example, the stopper (90) may include an elastic material, or a separate elastic member may be placed on the upper side of the stopper (90). By doing so, the stopper (90) can reduce the impact and / or vibration occurring on the door (30) and the guide roller (80) while the door (30) is being opened.

[0120] FIG. 9 illustrates a guide projection being separated from a guide rail when the door according to one embodiment of the present disclosure is in a first state. FIG. 10 illustrates a guide projection being separated from a guide rail when the door according to one embodiment of the present disclosure is in a second state.

[0121] Referring to FIG. 9, when the door (30) is in a first state (S1), the guide projection (80) can receive an external force applied from outside the main body (10). For example, while the door (30) is in the first state (S1), the movable member (82) of the guide projection (80) can be pressed by an external force applied through the first rail hole (731) (see FIG. 5 and FIG. 8). For example, a user can press the movable member (82) by inserting the user's hand or a tool into the first rail hole (731). When the door (30) is in the first state (S1), the guide projection (80) can be separated from the guide rail (70) while being pressed by an external force. For example, while the moving member (82) is inserted inside the holder (81), the moving member (82) does not interfere with the guide rail (70), and the guide projection (80) can be separated from the guide rail (70). As the guide projection (80) is separated from the guide rail (70), the door (30) can be rotated to open the cooking chamber (20). The door (30) can open the cooking chamber (20) in the unfolded state.

[0122] Referring to FIG. 10, when the door (30) is in a second state (S2), the guide projection (80) can receive an external force applied from outside the main body (10). For example, while the door (30) is in the second state (S2), the movable member (82) of the guide projection (80) can be pressed by an external force applied through the second rail hole (732) (see FIG. 6 and FIG. 8). For example, a user can press the movable member (82) by inserting the user's hand or a tool into the second rail hole (732). When the door (30) is in the second state (S2), the guide projection (80) can be separated from the guide rail (70) while being pressed by an external force. For example, while the moving member (82) is inserted into the holder (81), the moving member (82) does not interfere with the guide rail (70), and the guide projection (80) can be separated from the guide rail (70). As the guide projection (80) is separated from the guide rail (70), the door (30) can be switched from a folded state to an unfolded state.

[0123] Referring to FIGS. 9 and 10, as the guide projection (80) is separated from the guide rail (70), the door (30) can open the cooking chamber (20) in an unfolded state. Access to the rear of the door (30) can be facilitated. For example, the rear (31a) of the upper part (31), the rear (32a) of the lower part (32), and the rear (33a) of the middle part (33) can be exposed. This allows the user to perform maintenance on the door (30) smoothly and to clean the inside of the door (30).

[0124] FIG. 11 is a side cross-sectional view of a door when it is in a first state according to one embodiment of the present disclosure. FIG. 12 is a side cross-sectional view of a door when it is in a second state according to one embodiment of the present disclosure.

[0125] Referring to FIGS. 11 and 12, the middle portion (33) of the door (30) may include a first hinge shaft (331) and a second hinge shaft (332). The second hinge shaft (332) may be spaced apart from the first hinge shaft (331). The second hinge shaft (332) may be spaced downward from the first hinge shaft (331). The second hinge shaft (332) may be positioned below the first hinge shaft (331).

[0126] The upper part (31) may be configured to be rotatable with respect to the middle part (33) around the first hinge axis (331). The lower part (32) may be configured to be rotatable with respect to the middle part (33) around the second hinge axis (332). While the door (30) is transitioning from a first state (S1) to a second state (S2), the upper part (31) may rotate in a first direction (R1) with respect to the middle part (33). While the door (30) is transitioning from a first state (S1) to a second state (S2), the lower part (32) may rotate in a second direction (R2) with respect to the middle part (33). The first direction (R1) and the second direction (R2) may be opposite directions. Conversely, while the door (30) is transitioning from the second state (S2) to the first state (S1), the upper part (31) can rotate in the second direction (R2) relative to the middle part (33). While the door (30) is transitioning from the second state (S2) to the first state (S1), the lower part (32) can rotate in the first direction (R1) relative to the middle part (33). The door (30) may have two rotation axes (331, 332), and thus the door (30) may be configured to be foldable by being divided into the upper part (31), the lower part (32), and the middle part (33).

[0127] For example, the middle section (33) may include a middle panel (334) that forms at least a portion of the rear surface (33a) of the middle section (33). The middle panel (334) may be connected to a first hinge axis (331) and a second hinge axis (332).

[0128] For example, the door (30) may include a first connecting panel (35) that is coupled to a first hinge axis (331) and connects a middle section (33) and an upper section (31). The first connecting panel (35) may connect a middle panel (334) and an upper section (31). The first connecting panel (35) may be rotatably coupled to the first hinge axis (331). As the first connecting panel (35) rotates, the upper section (31) may also rotate. The upper section (31) may rotate together with the first connecting panel (35).

[0129] For example, the door (30) may include a second connecting panel (36) that is coupled to a second hinge axis (332) and connects the middle section (33) and the lower section (32). The second connecting panel (36) may connect the middle panel (334) and the lower section (32). The second connecting panel (36) may be rotatably coupled to the second hinge axis (332). As the second connecting panel (36) rotates, the lower section (32) may also rotate. The lower section (32) may rotate together with the second connecting panel (36).

[0130] The middle section (33) may include a cover frame (333). The cover frame (333) may have a curved shape. The cover frame (333) may include a shape that is approximately convex toward the front. When the door (30) closes the cooking chamber (20) (i.e., the first state (S1)), the cover frame (333) may be covered by the upper section (31) and the lower section (32). When the door (30) opens the cooking chamber (20) (i.e., the second state (S2)), the cover frame (333) may be arranged to cover between the upper section (31) and the lower section (32). While the door (30) is folded, the cover frame (333) may cover between the upper section (31) and the lower section (32). As a result, the cover frame (333) can minimize the gap formed as the door (30) is folded, thereby reducing and / or preventing accidents such as the user's fingers being pinched. Additionally, internal parts of the door (30) may not be exposed by the cover frame (333). The safety of use of the dishwasher (1) and the appearance quality of the door (30) of the dishwasher (1) can be improved.

[0131] FIG. 13 illustrates an example of a first locking member of a latch device according to an embodiment of the present disclosure. FIG. 14 illustrates an example of a second locking member of a latch device according to an embodiment of the present disclosure. FIG. 15 schematically illustrates a state before the first locking member is coupled to the second locking member in a cooking appliance according to an embodiment of the present disclosure. FIG. 16 schematically illustrates a state during the coupling of the first locking member to the second locking member in a cooking appliance according to an embodiment of the present disclosure. FIG. 17 schematically illustrates a state in which the first locking member is coupled to the second locking member in a cooking appliance according to an embodiment of the present disclosure. FIG. 18 schematically illustrates a state in which the first locking member coupled to the second locking member is pressed by a pressurizing member in a cooking appliance according to an embodiment of the present disclosure.

[0132] Referring to FIGS. 13 to 18, an example of a latch device (100) will be described.

[0133] The latch device (100) may include a first locking member (110). The first locking member (110) may be provided on the door (30) and configured to move together with the door (30). The first locking member (110) may be coupled to a second locking member (120) or separated from the second locking member (120).

[0134] The first locking member (110) may include a door bracket (111). The door bracket (111) may be fixed to the door (30). The door bracket (111) may be fixed to the middle portion (33) of the door (30).

[0135] The first locking member (110) may include a latch projection (112). The latch projection (112) may be configured to be rotatable with respect to the door bracket (111). The latch projection (112) may be rotatably coupled to the door bracket (111). The latch projection (112) may protrude to the rear of the door (30) through the door hole (30h). The latch projection (112) may protrude from the rear of the middle portion (33) of the door (30). The latch projection (112) may be referred to as the first latch projection (112) to distinguish it from the latch projection (126) to be described later.

[0136] The first locking member (110) may include a connecting pin (114). The latch projection (112) may rotate relative to the door bracket (111) around the connecting pin (114). The connecting pin (114) may connect the latch projection (112) to the door bracket (111). The connecting pin (114) may be inserted into the door bracket (111) and the latch projection (112). The connecting pin (114) may be referred to as the first connecting pin (114) to distinguish it from the connecting pin (128) to be described later.

[0137] The first locking member (110) may include a spring (113). The spring (113) may be connected to a door bracket (111) and a latch projection (112). The spring (113) may include a first end (1131) connected to the door bracket (111) and a second end (1132) connected to the latch projection (112). The spring (113) may have an elastic restoring force. The spring (113) may be configured to elastically bias the latch projection (112). For example, an extended spring (113) may rotate the latch projection (112) while contracting. The spring (113) may be referred to as a latch spring (113) to distinguish it from a guide spring (83). The spring (113) may be referred to as a first spring (113) to distinguish it from a spring (127) to be described later.

[0138] The latch device (100) may include a second locking member (120). The second locking member (120) may be provided in the main body (10). The second locking member (120) may be coupled with or uncoupled from the first locking member (110).

[0139] The second locking member (120) may include a latch frame (121). The latch frame (121) may be fixed to the main body (10). The latch frame (121) may be provided in a portion corresponding to the middle portion (33) of the main body (10). For example, the latch frame (121) may be placed in the space between the inner case (12) and the outer case (11). The latch frame (121) may be configured to accommodate a latch projection (112).

[0140] The second locking member (120) may include an inclined portion (122). The inclined portion (122) may be formed on the latch frame (121). The first locking member (110) may move along the inclined portion (122) and then be coupled to the second locking member (120). The latch projection (112) may be configured to be contactable with the inclined portion (122). The latch projection (112) may be configured to be movable along the inclined portion (122). The inclined portion (122) may be referred to as the first inclined portion (122) to distinguish it from the inclined portion (126a) to be described later.

[0141] The second locking member (120) may include a frame hole (123). The frame hole (123) may be formed in the latch frame (121). The latch projection (112) may enter the interior of the latch frame (121) through the frame hole (123). The frame hole (123) may be positioned on the front side of the inclined portion (122). The frame hole (123) may overlap with the main body hole (13h).

[0142] The second locking member (120) may include a latch engaging portion (124). The latch engaging portion (124) may be formed on the latch frame (121). The latch projection (112) may be configured to engage with the latch engaging portion (124). When the door (30) closes the cooking chamber (20), the latch projection (112) may be configured to engage with the latch engaging portion (124). As the latch projection (112) engages with the latch engaging portion (124), the first locking member (110) may be coupled to the second locking member (120). The latch engaging portion (124) may be positioned at the rear of the inclined portion (122). The latch engaging portion (124) may be referred to as the latch fixing portion (124). The latch engaging part (124) may be referred to as the first latch engaging part (124) to distinguish it from the latch engaging part (115) to be described later.

[0143] The latch device (100) may include a switch (130). The switch (130) may be configured to detect whether the door (30) is open or closed. The switch (130) may be configured to be in contact with the latch projection (112). The switch (130) may include a sensing part (131) configured to be pressed by the latch projection (112). When the sensing part (131) is pressed by the latch projection (112) (see FIG. 17), the switch (130) may generate a door closing signal and transmit it to the control unit (400, see FIG. 36). The control unit (400) may identify whether the door is open or closed based on the signal received from the switch (130). The switch (130) may be provided as a component of the second locking member (120).

[0144] The latch device (100) may include a pressure member (140). The pressure member (140) may be provided to press the latch projection (112). While the latch projection (112) is engaged with the latch catch portion (124), the pressure member (140) may be provided to press the latch projection (112) to restrict the movement of the latch projection (112). The pressure member (140) may include a movable pressure bar (141) to press the latch projection (112) (see FIG. 18). The pressure member (140) may also be provided as a component of the second locking member (120).

[0145] Next, an example of the joining process of the first locking member (110) and the second locking member (120) will be described.

[0146] Referring to FIG. 15, the first locking member (110) can move toward the second locking member (120). As the door (30) moves to close the cooking chamber (20), the first locking member (110) provided in the door (30) can also move. The middle portion (33) of the door (30) can move backward (- X direction).

[0147] Referring to FIG. 16, the first locking member (110) can be inserted into the body (10) through the body hole (13h) of the body (10). The latch projection (112) can enter the latch frame (121) through the body hole (13h) and the frame hole (123). The latch projection (112) can come into contact with the inclined portion (122). The latch projection (112) can move along the inclined portion (122). While the latch projection (112) moves along the inclined portion (122), the latch projection (112) can rotate relative to the door bracket (111). While the latch projection (112) moves along the inclined portion (122), the spring (113) can be extended.

[0148] Referring to FIG. 17, the latch projection (112) may be configured to move along the inclined portion (122) and then engage with the latch catch portion (124). The latch projection (112) may be configured to go over the inclined portion (122) and engage with the latch catch portion (124). A spring (113) may elastically bias the latch projection (112) so that the latch projection (112) engages with the latch catch portion (124). The latch projection (112) may be stably fixed to the latch catch portion (124) by the elastic restoring force of the spring (113). The spring (113) may rotate the latch projection (112) while contracting. While the latch projection (112) engages with the latch catch portion (124), a switch (130) may be arranged to contact the latch projection (112). Based on the switch (130) coming into contact with the latch projection (112), the cooking appliance (1) can identify that the door (30) closes the cooking chamber (20).

[0149] Referring to FIG. 18, while the latch projection (112) is engaged with the latch catch (124), the pressing member (140) can press the latch projection (112). The latch projection (112) can be fixed to the latch frame (121) by the pressing member (140). While the latch projection (112) is pressed by the pressing member (140), the opening of the door (30) may be restricted. For example, if the door (30) needs to remain closed, the pressing member (140) can operate to press the latch projection (112). The pressing bar (141) of the pressing member (140) can protrude toward the latch projection (112).

[0150] FIG. 19 illustrates an example of a first locking member of a latch device according to an embodiment of the present disclosure. FIG. 20 illustrates an example of a second locking member of a latch device according to an embodiment of the present disclosure. FIG. 21 schematically illustrates a state before the first locking member is coupled to the second locking member in a cooking appliance according to an embodiment of the present disclosure. FIG. 22 schematically illustrates a state during the coupling of the first locking member to the second locking member in a cooking appliance according to an embodiment of the present disclosure. FIG. 23 schematically illustrates a state in which the first locking member is coupled to the second locking member in a cooking appliance according to an embodiment of the present disclosure.

[0151] Referring to FIGS. 19 to 23, an example of a latch device (100) will be described.

[0152] The latch device (100) may include a first locking member (110). The first locking member (110) may be provided on the door (30) and configured to move together with the door (30). The first locking member (110) may be coupled to a second locking member (120) or separated from the second locking member (120).

[0153] The first locking member (110) may include a latch catch portion (115). The latch catch portion (115) may be positioned inside the door (30). The latch catch portion (115) may be fixed inside the door (30). For example, the latch catch portion (115) may include a roughly cylindrical shape. The latch catch portion (115) may be referred to as a locking pin (115). The latch catch portion (115) may be referred to as a latch fixing portion (115). The latch catch portion (115) may be referred to as a second latch catch portion (115) to distinguish it from the latch catch portion (124).

[0154] The latch device (100) may include a second locking member (120). The second locking member (120) may be provided in the main body (10). The second locking member (120) may be coupled with or uncoupled from the first locking member (110).

[0155] The second locking member (120) may include a main body bracket (125). The main body bracket (125) may be fixed to the main body (10). For example, the main body bracket (125) may be placed in the space between the inner case (12) and the outer case (11). The main body bracket (125) may include a rotation limiting rib (1251) that limits the rotation range of the latch projection (126) to be described later.

[0156] The second locking member (120) may include a latch projection (126). The latch projection (126) may be configured to be rotatable with respect to the main body bracket (125). The latch projection (126) may be rotatably coupled to the main body bracket (125). The latch projection (126) may protrude forward of the main body (10) through the main body hole (13h). The latch projection (126) may protrude from the front of the main body (10). The latch projection (126) may be configured to engage with the latch catch portion (115). When the door (30) closes the cooking chamber (20), the latch projection (126) may be configured to engage with the latch catch portion (115). As the latch projection (126) engages with the latch catch portion (115), the first locking member (110) can be coupled to the second locking member (120). The latch projection (126) may be referred to as the second latch projection (126) to distinguish it from the latch projection (112).

[0157] The second locking member (120) may include an inclined portion (126a). The inclined portion (126a) may be formed on the latch projection (126). The first locking member (110) may move along the inclined portion (126a) and then be coupled to the second locking member (120). The latch catch portion (115) may be configured to be contactable with the inclined portion (126a). The latch catch portion (115) may be configured to be movable along the inclined portion (126a). The inclined portion (126a) may be referred to as the second inclined portion (126a) to distinguish it from the inclined portion (122).

[0158] The second locking member (120) may include a spring (127). The spring (127) may be connected to the main body bracket (125) and the latch projection (126). The spring (127) may include a first end (1271) connected to the main body bracket (125) and a second end (1272) connected to the latch projection (126). The spring (127) may have an elastic restoring force. The spring (127) may be configured to elastically bias the latch projection (126). For example, an extended spring (127) may rotate the latch projection (126) while contracting. The spring (127) may be referred to as a latch spring (127) to distinguish it from the guide spring (83). The spring (127) may be referred to as a second spring (127) to distinguish it from the spring (113).

[0159] The second locking member (120) may include a connecting pin (128). The latch projection (126) may rotate relative to the main body bracket (125) around the connecting pin (128). The connecting pin (128) may connect the latch projection (126) to the main body bracket (125). The connecting pin (128) may be inserted into the main body bracket (125) and the latch projection (126). The connecting pin (128) may be referred to as the second connecting pin (128) to distinguish it from the connecting pin (114).

[0160] Next, an example of the joining process of the first locking member (110) and the second locking member (120) will be described.

[0161] Referring to FIG. 21, the first locking member (110) can move toward the second locking member (120). As the door (30) moves to close the cooking chamber (20), the first locking member (110) provided in the door (30) can also move. The middle portion (33) of the door (30) can move backward (- X direction).

[0162] Referring to FIG. 22, as the first locking member (110) moves toward the second locking member (120), the latch projection (126) can enter the interior of the door (30) through the door hole (30h). The latch projection (126) can be inserted into the interior of the door (30) through the door hole (30h). The latch catch portion (115) can come into contact with the inclined portion (126a). The latch catch portion (115) can move along the inclined portion (126a). While the latch catch portion (115) moves along the inclined portion (126a), the latch projection (126) can be rotated by being pressed against the latch catch portion (115). The latch projection (126) can rotate relative to the main body bracket (125). While the latch catch (115) moves along the inclined portion (126a), the spring (127) can be extended.

[0163] Referring to FIG. 23, the latch catch portion (115) can be configured to move along the inclined portion (126a) and then the latch projection (126) can be engaged with the latch catch portion (115). A spring (127) can elastically bias the latch projection (126) so that the latch projection (126) engages with the latch catch portion (115). The latch projection (126) can be stably fixed to the latch catch portion (115) by the elastic restoring force of the spring (127). The spring (127) can rotate the latch projection (126) while contracting. A rotation limiting rib (1251) can limit further rotation of the latch projection (126) in the direction of rotation by the spring (127) (see arrow in FIG. 23) while the latch projection (126) is fixed to the latch catch portion (115).

[0164] Generally, when a cooking appliance includes a foldable door, the space occupied by the door can be reduced when the door is open. However, while the door is closing the cooking chamber, a gap may form between the door and the cooking chamber due to internal pressure, the weight of the door, etc. Heat from inside the cooking chamber may escape through this gap, and the cooking performance and energy efficiency of the cooking appliance may be reduced.

[0165] According to the present disclosure, the cooking appliance (1) may include a latch device (100). A first locking member (110) provided in the middle portion (33) of the door (30) and a second locking member (120) provided in the main body (100) can be coupled. The first locking member (110) and the second locking member (120) can be coupled while the door (30) closes the cooking chamber (20). While the door (30) is in a first state (S1), the first locking member (110) and the second locking member (120) can be coupled. By doing so, the latch device (100) can prevent a gap from forming between the door (30) and the cooking chamber (20). The latch device (100) can prevent heat inside the cooking chamber (20) from leaking out while the door (30) closes the cooking chamber (20).

[0166] FIG. 24 is a rear perspective view of a cooking device according to one embodiment of the present disclosure.

[0167] Referring to FIG. 24, the cooking appliance (1) may include a door locking device (200). The door locking device (200) may be provided to secure a closed door (30) or to open a closed door (30). The door locking device (200) may be connected to a second locking member (120). The door locking device (200) may be mounted on the main body (100). For example, the door locking device (200) may be placed in the space between the inner case (12) and the outer case (11).

[0168] FIG. 25 is a schematic perspective view illustrating a door locking device that operates to open a door according to one embodiment of the present disclosure. FIG. 26 is a schematic side cross-sectional view illustrating a door locking device that operates to open a door according to one embodiment of the present disclosure. FIG. 27 is a schematic drawing illustrating a latch projection of a second locking member rotated by the door locking device to open a door according to one embodiment of the present disclosure.

[0169] The door locking device (200) may include a first motor (210). The first motor (210) may generate power. The first motor (210) may generate rotational force. The first motor (210) may be referred to as a first driving source (210).

[0170] The door locking device (200) may include a pusher (220). The pusher (220) may be connected to a first motor (210). The pusher (220) may be coupled to a rotation axis (211) of the first motor (210). The pusher (220) may be arranged to rotate by the first motor (210). The pusher (220) may press the slider (230) while rotating.

[0171] The door locking device (200) may include a slider (230). The slider (230) may be configured to be movable as it is pressed by a pusher (220). As the slider (230) moves, the connecting rod (240) connected to the slider (230) may also move.

[0172] The door locking device (200) may include a connecting rod (240). The connecting rod (240) may connect the second locking member (120) and the slider (230). A first end (241) of the connecting rod (240) may be connected to the second locking member (120), and a second end (242) of the connecting member (240) may be connected to the slider (230). The connecting rod (240) may connect the latch projection (126) and the slider (230). The connecting rod (240) may be moved by the slider (230). The connecting rod (240) may be linked to the movement of the slider (230).

[0173] The first motor (210) of the door locking device (200) can rotate to open the closed door (30). Based on the rotation of the first motor (210), the latch projection (126) can be configured to rotate relative to the main body bracket (125) by the connecting rod (240) so as to be released from the latch catch (115).

[0174] Referring to FIGS. 25 and 26, as the first motor (210) rotates, the pusher (220) connected to the first motor (210) can rotate. As the pusher (220) rotates, it can press the slider (230). The slider (230) can move by being pressed by the pusher (220). The connecting rod (240) connected to the slider (230) can move by the slider (230).

[0175] Referring to FIG. 27, the connecting rod (240) may be configured to rotate the latch projection (126) relative to the main body bracket (125) in conjunction with the movement of the slider (230). The connecting rod (240) may be pressed by the slider (230) to rotate the latch projection (126). As the connecting rod (240) presses the latch projection (126), the spring (127) extends and the latch projection (126) may rotate around the connecting pin (128). As the latch projection (126) rotates by the connecting rod (240), it may be released from the latch catch (115). The second locking member (120) may be separated from the first locking member (110). Thus, the door (30) may be opened.

[0176] FIG. 28 is a schematic perspective view illustrating a door locking device that operates to lock a door according to one embodiment of the present disclosure. FIG. 29 is a schematic side cross-sectional view illustrating a door locking device that operates to lock a door according to one embodiment of the present disclosure. FIG. 30 is a schematic drawing illustrating a view in which the rotation of a latch projection of a second locking member is restricted to lock a door according to one embodiment of the present disclosure.

[0177] The door locking device (200) may include a second motor (250). The second motor (250) may generate power. The second motor (250) may generate rotational force. The second motor (250) may be referred to as a second driving source (250).

[0178] The door locking device (200) may include a cam (260). The cam (260) may be connected to a second motor (250). The cam (260) may be coupled to a rotation axis (251) of the second motor (250). The cam (260) may be arranged to rotate by the second motor (250). The cam (260) may move the locker (270) while rotating. For example, the cam (260) may induce the locker (270) to move eccentrically relative to the second motor (250).

[0179] The door locking device (200) may include a locker (270). The locker (270) is connected to a cam (260) and may be configured to be movable by the cam (260). The locker (270) may rotate eccentrically from the rotation axis (251) of the second motor (250). The locker (270) may include a hook (271). As the locker (270) moves by the cam (260), the hook (271) may interfere with the slider (230). Thus, the locker (270) may restrict the movement of the slider (230).

[0180] The second motor (250) of the door locking device (200) can rotate to secure the closed door (30). Based on the rotation of the second motor (250), the locker (270) can be configured to move by the cam (260) and interfere with the slider (230).

[0181] Referring to FIGS. 28 and 29, as the second motor (250) rotates, the cam (260) connected to the second motor (250) can rotate. As the cam (260) rotates, it can guide the movement of the rocker (270). As the rocker (270) moves, it may interfere with the slider (230). For example, the hook (271) of the rocker (270) can fix the slider protrusion (231) of the slider (230). The slider (230) and the connecting rod (240) connected to the slider (230) may be constrained by the rocker (270) and may not move. As a result, the latch projection (126) connected to the connecting rod (240) may not rotate.

[0182] Referring to FIG. 30, since the rotation of the latch projection (126) is restricted, the latch projection (126) may not be separated from the latch locking part (115) while engaged with the latch locking part (115). The first locking member (110) and the second locking member (120) may maintain a coupled state. As a result, the door (30) may not be opened.

[0183] FIG. 31 is a rear perspective view of a cooking appliance according to one embodiment of the present disclosure. FIG. 32 is an exploded view of a door opening and closing device according to one embodiment of the present disclosure. FIG. 33 schematically illustrates the state of the door opening and closing device according to one embodiment of the present disclosure before opening the door. FIG. 34 schematically illustrates the state of the door opening and closing device according to one embodiment of the present disclosure while opening the door. FIG. 35 schematically illustrates the state of the door opening and closing device according to one embodiment of the present disclosure after opening the door.

[0184] Referring to FIGS. 31 through 35, the cooking appliance (1) may include a door opening / closing device (300). The door (30) may be configured to be opened or closed by the door opening / closing device (300). The door opening / closing device (300) may be provided to push the door (30) so that the door (30) opens the cooking chamber (20). The door opening / closing device (300) may be provided to pull the door (30) so that the door (30) closes the cooking chamber (20). The door opening / closing device (300) may be connected to the door (30).

[0185] The door opening / closing device (300) can be mounted on the main body (10). The door opening / closing device (300) can be placed inside the main body (10). For example, the door opening / closing device (300) can be placed in the space between the inner case (12) and the outer case (11). For example, the door opening / closing device (300) can be placed below the inner case (12). For example, the door opening / closing device (300) can be placed below the cooking chamber (20).

[0186] The door opening / closing device (300) may include an actuator (310). The actuator (310) may include a linear rod (311). The linear rod (311) may be configured to be movable in the forward / backward direction (X direction). The linear rod (311) may move to protrude toward the door (30) or move away from the door (30). The linear rod (311) may be configured to perform linear motion. A first connecting hole (312) may be formed in the linear rod (311).

[0187] The door opening / closing device (300) may include a door link (320). The door link (320) may be mounted on the rear of the door (30). The door link (320) may be provided on the rear of the lower portion (32) of the door (30). The door link (320) may include a second connecting hole (321).

[0188] The door opening / closing device (300) may include a connecting link (330). The connecting link (330) may connect an actuator (310) and a door link (320). A first end of the connecting link (330) may be rotatably connected to the actuator (310). A second end of the connecting link (330) may be rotatably connected to the door link (320). The connecting link (330) may include a first link hole (3301) corresponding to a first connecting hole (312). The first link hole (3301) may include a first hole end (3301a) and a second hole end (3301b). For example, the first link hole (3301) may have an elliptical shape. For example, the first link hole (3301) may have an elongated hole shape. The connecting link (330) may include a second link hole (3302) corresponding to the second connecting hole (321). For example, the second link hole (3302) may have a circular shape.

[0189] The door opening / closing device (300) may include a first joint (340). The first joint (340) may connect the linear rod (311) of the actuator (310) with the connecting link (330). The first joint (340) may be inserted into the first connecting hole (312) and the first link hole (3301). The first joint (340) may be configured to be movable within the first link hole (3301).

[0190] The door opening / closing device (300) may include a second joint (350). The second joint (350) may combine the door link (320) and the connecting link (330). The second joint (350) may be inserted into the second connecting hole (321) and the second link hole (3302). The door link (320) may rotate around the second joint (350).

[0191] Referring to FIGS. 33 to 35, an example of the process in which a door opening / closing device (300) opens a door (30) will be described.

[0192] When the door (30) is closed, the first joint (340) may be provided at the first hole end (3301a) of the first link hole (3301). As the linear rod (311) of the actuator (310) protrudes toward the door (30), the first joint (340) may move from the first hole end (3301a) of the first link hole (3301) to the second hole end (3301b). The linear rod (311) of the actuator (310) presses the connecting link (330), and the connecting link (330) and the door link (320) may rotate. At least a portion of the connecting link (330) and the door link (320) may be lifted. The door (30) connected to the door link (320) may rotate to open the kitchen (20). As at least a portion of the lifted connecting link (330) and the door link (320) are lowered again, the first joint (340) can move from the second hole end (3301b) of the first link hole (3301) to the first hole end (3301a). The door (30) can be fully opened.

[0193] Meanwhile, when the door opening / closing device (300) closes the door (30), the process illustrated in FIGS. 33 to 35 may be performed in reverse order. For example, when the door (30) is open, the door (30) may be rotated to close as the linear rod (311) of the protruding actuator (310) moves away from the door (30).

[0194] FIG. 36 is a control block diagram of a cooking device according to one embodiment of the present disclosure.

[0195] Referring to FIG. 36, a cooking appliance (1) according to one embodiment of the present disclosure may include a user interface (60), a communication module (500), a door locking device (200), a door opening / closing device (300), and a control unit (400). The control unit (400) is electrically connected to the components of the cooking appliance (1) and can control the components of the cooking appliance (1).

[0196] The user interface (60) can enable the user and the cooking appliance (1) to interact with each other.

[0197] The user interface (60) may include at least one input interface (61) and at least one output interface (62).

[0198] At least one input interface (61) can convert sensory information received from a user into an electrical signal. At least one input interface (61) can receive user input.

[0199] For example, at least one input interface (61) may include a knob, a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, a touch switch, a touch pad, a touch screen, a jog dial, and / or a microphone.

[0200] The control unit (400) can control the operation of the cooking device (1) by processing commands received through the input interface (61).

[0201] At least one output interface (62) can transmit various information related to the operation of the cooking appliance (1) to the user by generating sensory information. At least one output interface (62) can display information related to the operation of the cooking appliance (1). At least one output interface (62) can display information entered by the user or information provided to the user on various screens.

[0202] For example, at least one output interface (62) can transmit information related to the operating time of the cooking appliance (1), the settings of the cooking appliance (1), etc. to the user. Information regarding the operation of the cooking appliance (1) can be output via a display, an indicator, voice, etc. At least one output interface (62) may include, for example, a Liquid Crystal Display (LCD) panel, an indicator, a Light Emitting Diode (LED) panel, a speaker, etc.

[0203] The control unit (400) can control the output interface (62) to output sensory information about the cooking device (1).

[0204] The communication module (500) can communicate with an external device (e.g., server, user device, and / or home appliance) via wired and / or wireless communication.

[0205] The communication module (500) may include at least one of a short-range communication module or a long-range communication module.

[0206] The communication module (500) can transmit data to an external device or receive data from an external device. For example, the communication module (500) can establish communication with a server, a user device and / or other home appliances and transmit and receive various data.

[0207] The control unit (400) can receive commands to control the cooking device (1) from an external device through the communication module (500). The control unit (400) can receive recipe information from an external device through the communication module (500). The control unit (400) can receive information about the food to be cooked from an external device through the communication module (500).

[0208] A door locking device (200) may be provided to open or lock the door (30). The door locking device (200) may include a first motor (210) and a second motor (250). The first motor (210) may operate to open the closed door (30). The second motor (250) may operate to lock the closed door (30).

[0209] The control unit (400) can control the door locking device (200) based on user input received through the user interface (60) and / or the communication module (500). The control unit (400) can control the door locking device (200) to rotate the first motor (210) based on receiving a door opening command. The control unit (400) can control the door locking device (200) to rotate the second motor (250) based on receiving a door locking command.

[0210] A door opening / closing device (300) may be provided to open and close a door (30). The door opening / closing device (300) may include an actuator (310).

[0211] The control unit (400) can control the door opening / closing device (300) based on user input received through the user interface (60) and / or the communication module (500). The control unit (400) can control the door opening / closing device (300) so that the linear rod (311) of the actuator (310) moves forward based on receiving a door opening command. The control unit (400) can control the door opening / closing device (300) so that the linear rod (311) of the actuator (310) moves backward based on receiving a door closing command.

[0212] The control unit (400) may include a processor (410) and a memory (420). The processor (410) and the memory (420) may be implemented as separate chips or as a single chip. Additionally, the control unit (400) may include a plurality of processors and a plurality of memories.

[0213] The processor (410) is hardware and may include logic circuits and arithmetic circuits. The processor (410) can control electrically connected components of the cooking appliance (1) using programs, instructions, and / or data stored in memory (420) for the operation of the cooking appliance (1).

[0214] The memory (420) can store programs, applications, and / or data for the operation of the cooking device (1), and can store data generated by the processor (410). The memory (420) may include non-volatile memory such as ROM (Read Only Memory) and flash memory for storing data for a long period. The memory (420) may include volatile memory such as S-RAM (Static Random Access Memory) and D-RAM (Dynamic Random Access Memory) for temporarily storing data.

[0215] According to one embodiment of the present disclosure, a cooking device (1) may include a main body (10) including a cooking chamber (20); a door (30) that is foldable to open and close the cooking chamber (20), and includes an upper portion (31), a lower portion (32), and a middle portion (33) provided between the upper portion and the lower portion; and a latch device (100) configured to selectively restrain the door (30) to the main body (10). The latch device (100) may include a first locking member (110) provided on the middle portion (33) of the door (30); and a second locking member (120) provided on the main body (10) and including an inclined portion (122; 126a). While the door (30) closes the cooking chamber (20), the first locking member (110) may be configured to move along the inclined portion (122; 126a) and then be coupled to the second locking member (120).

[0216] The first locking member (110) may include a door bracket (111) fixed to the door; and a latch projection (112) rotatably oriented with respect to the door bracket, protruding from the rear of the door, and configured to be contactable with the inclined portion (122). The second locking member (120) may include a latch frame (121) fixed to the main body and configured to accommodate the latch projection; and a latch catch portion (124) formed on the latch frame and provided at the rear of the inclined portion. When the door (30) closes the cooking chamber (20), the latch projection (112) may be configured to engage with the latch catch portion (124).

[0217] The first locking member (110) may include a spring (113) comprising a first end (1131) connected to the door bracket and a second end (1132) connected to the latch projection. The spring (113) may be configured to elastically bias the latch projection (112) so that the latch projection engages with the latch catch portion (124).

[0218] The above cooking device (1) may further include a switch (130) mounted on the latch frame and configured to detect whether the door is open or closed, wherein the switch (130) is configured to contact the latch projection (112) while the latch projection (112) is engaged with the latch catch portion (124).

[0219] The above cooking device (1) may further include a pressing member (140) provided to press the latch projection (112) so as to restrict the movement of the latch projection while the latch projection (112) is engaged with the latch catch portion (124).

[0220] The first locking member (110) may include a latch catch portion (115) disposed inside the door. The second locking member (120) may include a main body bracket (125) fixed to the main body. The second locking member (120) may include a latch projection (126) that is rotatable with respect to the main body bracket, protrudes from the front of the main body, and includes the inclined portion (126a). The latch projection (126) may be configured to engage with the latch catch portion (115) when the door is closed to the cooking chamber.

[0221] The second locking member (120) may include a spring (127) comprising a first end (1271) connected to the main body bracket and a second end (1272) connected to the latch projection. The spring (127) may be configured to elastically bias the latch projection (126) so that the latch projection (126) engages with the latch catch portion (115).

[0222] The above cooking device (1) may include: a first motor (210); a pusher (220) connected to the first motor and configured to rotate by the first motor; a slider (230) configured to be movable as it is pressed by the pusher; a connecting rod (240) connecting the slider and the latch projection and configured to rotate the latch projection relative to the main body bracket in conjunction with the movement of the slider; a second motor (250); a cam (260) connected to the second motor and configured to rotate by the second motor; and a locker (270) connected to the cam and configured to be movable by the cam.

[0223] Based on the rotation of the first motor (210), the latch projection (126) may be configured to rotate relative to the main body bracket (125) by the connecting rod (240) to be released from the latch locking portion (115). Based on the rotation of the second motor (250), the locker (270) may be configured to move by the cam (260) to interfere with the slider (230).

[0224] The middle portion (33) may include a first hinge axis (331) and a second hinge axis (332) spaced apart from the first hinge axis. The upper portion (31) may be configured to be rotatable about the middle portion around the first hinge axis (331). The lower portion (32) may be configured to be rotatable about the middle portion around the second hinge axis (332).

[0225] The middle section (33) is provided to cover the space between the upper section (31) and the lower section (32) when the door is open to the cooking chamber, and may include a cover frame (333) having a curved shape.

[0226] The above cooking device (1) may include a guide rail (70) mounted on the main body and extending in a vertical direction; and a guide projection (80) mounted on the door and configured to move along the guide rail.

[0227] The guide rail (70) may include a rail hole (73). The guide projection (80) may include a holder (81) mounted on the upper part of the door; a spring (83) received in the holder; and a movable member (82) provided to be elastically biased by the spring to protrude from the holder or to be inserted into the holder as it is pressed, and provided to be exposed to the outside of the main body (10) through the rail hole (73).

[0228] The above cooking device (1) may include a stopper (90) that supports the guide projection (80) and is mounted on the guide rail (70) to restrict the downward movement of the guide projection (80) when the door is open to the cooking chamber.

[0229] The above cooking device (1) may include a door opening / closing device (300) which is provided to push the door to open the cooking chamber and to pull the door to close the cooking chamber. The door opening / closing device (300) may include an actuator (310) having a linear rod movable in the forward and backward directions; a door link (320) provided on the rear of the lower portion of the door; and a connecting link (330) having a first end rotatably connected to the actuator and a second end rotatably connected to the door link.

[0230] According to one embodiment of the present disclosure, a cooking device (1) may include: a main body (10) comprising a cooking chamber (20); a door (30) switchable between a first state (S1) of closing the cooking chamber and a second state (S2) configured to be folded to open the cooking chamber; a guide rail (70) mounted on the main body and extending in a vertical direction; a guide projection (80) mounted on the door and configured to be movable along the guide rail; and a stopper (90) mounted on the guide rail (70). The stopper (90) may support the guide projection (80) to restrict the downward movement of the guide projection (80) while the door is in the second state.

[0231] The guide rail (70) may include a rail hole (73). The guide projection (80) may be configured to be accessible through the rail hole (73).

[0232] The door (30) may include an upper portion (31) on which the guide projection is mounted; a lower portion (32) positioned below the upper portion; and a middle portion (33) provided between the upper portion and the lower portion. While the door is transitioning from the first state (S1) to the second state (S2), the upper portion may be configured to rotate in a first direction (R1) relative to the middle portion, and the lower portion may be configured to rotate in a second direction (R2) relative to the middle portion. While the door is in the second state (S2), the rear surface of the upper portion (31) and the rear surface of the lower portion (32) may be configured to form an acute angle.

[0233] The main body (10) may include an inner case (12) that forms the cooking chamber (20). The cooking device (1) may include a tray (22) configured to allow a cooking object to be placed thereon, which can be inserted into the cooking chamber (20) and withdrawn from the cooking chamber (20); and a plurality of supports (21) formed on the side wall of the inner case (12) to support the tray (22), wherein the supports (21) are spaced apart in a vertical direction. While the door is in the second state (S2), the upper part (31) of the door may be positioned below the lowest support (21a) among the plurality of supports (21).

[0234] The above cooking device (1) may further include a latch device (100) configured to selectively restrain the door to the main body. The latch device (100) may include a first locking member (110) provided in the middle portion of the door; and a second locking member (120) provided in the main body. While the door is in the first state (S1), the first locking member (110) may be configured to be coupled to the second locking member (120).

[0235] According to one embodiment of the present disclosure, a cooking appliance may have a foldable door. As the door folds when opened, the space occupied by the door may be reduced.

[0236] According to one embodiment of the present disclosure, the door includes an upper portion, a lower portion, and a middle portion, and when the door is closed, the middle portion of the door and the main body can be joined. This prevents heat from leaking between the middle portion of the door and the main body.

[0237] According to one embodiment of the present disclosure, when the door is opened, the cover frame of the middle portion can cover the space between the upper portion and the lower portion. This can prevent accidents such as the user's fingers being pinched.

[0238] According to one embodiment of the present disclosure, when the door is opened, the upper portion and the lower portion may maintain a constant acute angle so as not to be horizontal to each other. To this end, a stopper may be disposed on the guide rail. A small amount of force may be required when closing the door.

[0239] According to one embodiment of the present disclosure, the guide projection may be configured to be detachable from the guide rail. As the guide projection detaches from the guide rail, the rear surface of the door may be exposed. The user can easily clean the inside of the door.

[0240] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0241] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. A main body including a cooking chamber; A door movable between a first state of closing the cooking chamber and a second state of opening the cooking chamber, comprising a middle portion, an upper portion foldable with respect to the middle portion, and a lower portion foldable with respect to the middle portion, wherein when the door is in the first state, the upper portion and the lower portion are unfolded with respect to the middle portion, and when the door is in the second state, the upper portion and the lower portion are folded with respect to the middle portion; and A latch device comprising a first locking member provided in the middle portion and a second locking member provided in the main body and including an inclined portion; A cooking apparatus configured such that, as the door moves from the second state to the first state, the middle portion moves toward the cooking chamber and the upper portion and the lower portion unfold relative to the middle portion, and as the middle portion moves toward the cooking chamber, the first locking member contacts the inclined portion and moves along the inclined portion so as to engage with the second locking member when the door is in the first state, thereby restraining the door to the main body.

2. In Paragraph 1, The first locking member above is, A door bracket fixed to the above door; and It includes a latch projection that protrudes from the rear of the door, is rotatable with respect to the door bracket, and is configured to come into contact with the inclined portion as the middle portion moves toward the cooking chamber. The second locking member above is, A latch frame fixed to the main body and configured to accommodate the latch projection; It includes a latch catch portion formed on the above latch frame and provided on the rear side of the above inclined portion; A cooking appliance configured such that when the door is in the first state, the latch projection engages with the latch catch portion.

3. In Paragraph 2, The first locking member above is, A cooking appliance further comprising: a spring having a first end connected to the door bracket and a second end connected to the latch projection, configured to elastically bias the latch projection so that the latch projection engages with the latch catch when the door is in the first state.

4. In Paragraph 2, A cooking appliance further comprising: a switch mounted on the latch frame and configured to contact the latch projection when the latch projection engages with the latch catch portion, so as to detect whether the door is in the first state.

5. In Paragraph 2, A cooking appliance further comprising a pressurizing member configured to pressurize the latch projection to restrict the movement of the latch projection when the latch projection engages with the latch catch portion.

6. In Paragraph 1, The first locking member above is, It includes a latch engaging part disposed inside the door; and The second locking member above is, A main body bracket fixed to the main body; and A latch projection protruding from the front of the main body, rotatable with respect to the main body bracket, and including the inclined portion; A cooking appliance configured such that the above latch projection engages with the latch catch when the door is in the first state.

7. In Paragraph 6, The second locking member above is, A cooking appliance further comprising: a spring including a first end connected to the main body bracket and a second end connected to the latch projection, configured to elastically bias the latch projection so that the latch projection engages with the latch catch portion.

8. In Paragraph 6, First motor; A pusher connected to the first motor and arranged to rotate by the first motor; A slider configured to be movable as it is pressed by the above-mentioned pusher; A connecting rod that connects the slider and the latch projection, and is configured to rotate the latch projection relative to the main body bracket in conjunction with the movement of the slider; Second motor; A cam connected to the second motor and arranged to rotate by the second motor; and A cooking device comprising a rocker connected to the cam and configured to be movable by the cam.

9. In Paragraph 8, Based on the rotation of the first motor, the latch projection is configured to rotate relative to the main body bracket by the connecting rod to be released from the latch catch portion, and A cooking appliance configured such that, based on the rotation of the second motor, the rocker is moved by the cam to interfere with the slider.

10. In Paragraph 1, The above middle portion includes a first hinge axis and a second hinge axis spaced apart from the first hinge axis, and The upper portion is configured to be rotatable about the middle portion around the first hinge axis so that the upper portion is foldable about the middle portion, and A cooking device configured such that the lower portion is rotatable about the middle portion around the second hinge axis, so that the lower portion is foldable about the middle portion.

11. In Paragraph 1, A cooking appliance comprising a cover frame having a curved shape and configured to minimize the gap between the upper part and the lower part when the door is in the second state.

12. In Paragraph 1, A guide rail mounted on the above main body and extending in a vertical direction; and A cooking appliance further comprising a guide projection mounted on the door and configured to move along the guide rail.

13. In Paragraph 12, The above guide rail includes a rail hole, The above guide projection is, A holder mounted on the upper part of the above door; A spring accommodated in the above holder; and A movable member provided to be elastically biased by the spring to protrude from the holder or to be inserted into the holder as it is pressed; A cooking appliance comprising: a moving member that is exposed to the outside of the main body through the rail hole and is configured to allow the moving member to be inserted into the holder so as to separate the guide projection from the guide rail.

14. In Paragraph 12, A cooking appliance further comprising a stopper mounted on the guide rail and supporting the guide projection to restrict the downward movement of the guide projection when the door is in the second state.

15. In Paragraph 1, A door opening and closing device further comprising: a door configured to push the door so that the door moves from the first state to the second state, and a door configured to pull the door so that the door moves from the second state to the first state. The above door opening and closing device is, An actuator having a linear rod movable in the forward and backward directions; A door link provided on the rear side of the lower portion of the above door; and A cooking appliance comprising a connecting link including a first end rotatably connected to the actuator and a second end rotatably connected to the door link.

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