Refrigerator and door opening and closing device

Abstract

The present application relates to a refrigerator and a door opening and closing device. The refrigerator of the present embodiment includes a cabinet having a storage space, a door opening and closing the storage space, and a door opening and closing device opening and closing the door, wherein the door opening and closing device includes a driver generating power, a power transmission part transmitting the power of the driver, and an operating part receiving the power of the driver and operating to open the door and including a link connected to the door, wherein the power transmission part includes an input gear assembly configured to receive the power from the driver, an output gear assembly configured to be connected to the input gear assembly to receive the power from the input gear assembly when the driver operates, and to be disconnected from the input gear assembly when the driver stops, and wherein a rotation center of the input gear assembly and a rotation center of the output gear assembly are spaced apart from each other.

Description

Technical Field

[0001] This invention relates to a refrigerator and a door opening and closing device. Background Technology

[0002] A refrigerator is typically a household appliance used to store food in a closed storage space at low temperatures using cold air.

[0003] The storage space is surrounded by insulating walls, which keeps the interior temperature lower than the outside temperature. Depending on the temperature range of the storage space, it can be called a refrigerator compartment or a freezer compartment.

[0004] To put or take items into or out of the storage space, the user opens the door. Typically, the door is rotatably mounted on the cabinet, and a gasket is placed between the door and the cabinet. Therefore, when the door is closed, the gasket seals tightly between the door and the cabinet, preventing cold air from leaking out of the storage space. The stronger the seal of the gasket, the better it prevents cold air leakage.

[0005] To increase the sealing force of the gasket, it can be made of rubber, and a magnet can be placed inside the gasket. However, as the sealing force of the gasket increases, more force is required to open the door.

[0006] Therefore, refrigerators with automatic door opening functions have recently been proposed. The relevant prior art document is Chinese Utility Model Registration No. 218324468. Summary of the Invention

[0007] One embodiment of the present invention provides a refrigerator and a door opening and closing device that increases the door opening angle when the door opens automatically.

[0008] Alternatively or additionally, one embodiment provides a refrigerator and a door opening and closing device that can automatically open and close the door.

[0009] Alternatively or additionally, one embodiment provides a refrigerator and a door opening and closing device, wherein the door can be opened automatically and manually by a user.

[0010] Alternatively or additionally, one embodiment provides a refrigerator and door opening and closing device that prevents damage to the actuator and allows the door to close smoothly when the user manually closes the door after operation with the actuator stopped.

[0011] Alternatively or additionally, one embodiment provides a refrigerator and door opening and closing device, wherein damage to the actuator used for automatic opening is prevented when the door is manually opened.

[0012] A refrigerator, according to one aspect, may include: a cabinet with storage space; a door for opening and closing the storage space; and a door opening and closing device for opening and closing the door.

[0013] The door opening and closing device may include a drive that generates power, a power transmission unit that transmits the power of the drive, and an operating unit that receives the power of the drive and operates it to open the door. The operating unit may include a linkage connected to the door.

[0014] The power transmission unit may include an input gear assembly to receive power from the drive. The input gear assembly may be referred to as an input unit.

[0015] The power transmission unit may include an output gear assembly configured to connect to an input gear assembly to receive power from the input gear assembly during drive operation and to disconnect from the input gear assembly when the drive stops. The output gear assembly may also be referred to as an output unit. The rotation centers of the input gear assembly and the output gear assembly may be spaced apart from each other.

[0016] The input gear assembly may include a shaft, a first input gear connected to the shaft and a driver, and a second input gear connected to the shaft. The first input gear may be referred to as the input gear, and the second input gear may be referred to as the clutch gear. The rotation direction of the second input gear may be opposite to the rotation direction of the output gear assembly.

[0017] When the first input gear rotates, the second input gear can move in the axial direction of the shaft.

[0018] When the drive is stopped, the second input gear is in the initial position, and the second input gear can be disconnected from the output gear assembly in the initial position.

[0019] When the driver operates in the forward direction, the second input gear can move along the shaft in one direction due to static inertia, and when the driver operates in the opposite direction, the second input gear can move along the shaft in another direction opposite to the first direction.

[0020] The shaft may include a screw or a worm gear to allow the second input gear to move.

[0021] The second input gear can be directly connected to the shaft, and a screw or gear with a shape corresponding to a screw or worm gear can be formed on the second input gear.

[0022] The second input gear can be connected to the shaft via a connecting member, and a screw or gear having a shape corresponding to a screw or worm gear can be formed on the connecting member.

[0023] The input gear assembly may further include: a first elastic member that restricts the movement of the second input gear when the drive stops during reverse operation of the drive and the second input gear moves in one direction; and a second elastic member that restricts the movement of the second input gear when the drive stops during forward operation of the drive and the second input gear moves in another direction.

[0024] The output gear assembly may include: a first output gear configured to engage with the second input gear when the second input gear moves in one direction; and a second output gear configured to engage with the second input gear when the second input gear moves in another direction.

[0025] When the second input gear is in the initial position, the second input gear can be disconnected from the first output gear and the second output gear.

[0026] The output gear assembly may include a connecting portion that connects the first output gear and the second output gear. The first output gear and the second output gear can rotate together.

[0027] The second input gear may include a plurality of gear teeth. A first inclined surface may be formed on the portion of each gear tooth facing the first output gear, and a second inclined surface may be formed on the portion of each gear tooth facing the second output gear.

[0028] An inclined surface may be formed on the portion of each tooth of the first output gear facing the first inclined surface. An inclined surface may be formed on the portion of each tooth of the second output gear facing the second inclined surface.

[0029] The second input gear may include a first gear portion connected to a shaft and a second gear portion connected to the first gear portion and configured to rotatable relative to the first gear portion.

[0030] The operating unit may include a first operating unit and a second operating unit. The first operating unit is operated by receiving power from a driver, and the second operating unit is operated by receiving power from the driver from an output gear and is positioned at a location spaced apart from the rotation center of the door. The first operating unit may begin operation when the driver operates to automatically open the door, and the second operating unit may begin operation after the first operating unit has begun operation. The second operating unit may include a linkage.

[0031] According to another aspect, a door opening and closing device for opening and closing a door may include: a drive unit configured to generate power; a power transmission unit configured to transmit power from the drive unit; and an operating unit configured to operate by receiving power from the drive unit to open the door.

[0032] The operating unit may include: a first operating unit configured to operate by receiving power from a drive to open the door; and a second operating unit configured to operate by receiving power from a drive and having a linkage connected to the door.

[0033] The power transmission unit may include an input gear assembly.

[0034] The power transmission unit may also include an output gear assembly.

[0035] The output gear assembly can receive power from the input gear assembly and transmit the power to the second operating unit.

[0036] The input gear assembly may include a second input gear, which is in an initial position when the driver is stopped, and is configured to move to engage with the output gear assembly when the driver is operated.

[0037] The input gear assembly may also include a shaft and a first input gear connected to the shaft and the driver. A second input gear may be configured to rotate together with the first input gear.

[0038] The second input gear can be connected to the shaft to move in the axial direction of the shaft.

[0039] The input gear assembly can transmit power to the output gear assembly in a direction that intersects the axial direction of the shaft.

[0040] The output gear assembly may include: a first output gear configured to connect to the second input gear when the driver operates in the forward direction; and a second output gear configured to connect to the second input gear when the driver operates in the reverse direction.

[0041] The first output gear and the second output gear can rotate in the opposite direction to the rotation direction of the second input gear.

[0042] The first output gear and the second output gear can rotate together in the same direction.

[0043] The input gear assembly may further include: a first elastic member that restricts the movement of the second input gear when the drive stops during reverse operation of the drive and the second input gear moves in one direction; and a second elastic member that restricts the movement of the second input gear when the drive stops during forward operation of the drive and the second input gear moves in another direction.

[0044] According to one embodiment, the advantage is that it increases the opening angle of the door when it opens automatically.

[0045] According to the embodiment, the advantage is that the door can not only open automatically but also close automatically.

[0046] According to the embodiment, the advantage is that the door can not only open automatically, but also be opened manually by the user.

[0047] According to an embodiment, when the drive stops after operation, the connection between the drive and the transmission unit is released. This provides the advantage of not only preventing damage to the drive when the user manually closes the door but also allowing the door to close smoothly.

[0048] According to the embodiment, the advantage is that when the door is opened manually, damage to the actuator used for automatic opening is prevented, and operating noise is reduced. Attached Figure Description

[0049] Figure 1 This is a perspective view showing a portion of a refrigerator according to a first embodiment.

[0050] Figure 2 This is a plan view of the refrigerator according to the first embodiment.

[0051] Figure 3 This is an enlarged view showing a door opening and closing device installed at a refrigerator according to the first embodiment.

[0052] Figure 4 This is a diagram showing a portion of the power transmission section of the door opening and closing device according to the first embodiment.

[0053] Figure 5 This is a cross-sectional view of the fifth gear used to transmit power to the first operating part.

[0054] Figure 6A It is a perspective view of the transmission gear, and Figure 6B This is a side view of the transmission gear.

[0055] Figure 7 This is a perspective view showing the clutch device of the first embodiment.

[0056] Figure 8 This is a front view showing the clutch device according to the first embodiment.

[0057] Figure 9 This is an exploded perspective view of the clutch device according to the first embodiment.

[0058] Figure 10 It is along Figure 7 The sectional view taken from line 10-10.

[0059] Figure 11 This is a view showing the inclined surfaces of the second input gear and the first output gear according to the first embodiment.

[0060] Figure 12 This is a view showing the state where the second input gear moves upward on the third side to automatically open the door.

[0061] Figures 13 to 20 It is a view showing the process of the door opening automatically.

[0062] Figure 21 This is a view showing the state in which the second input gear moves in the fourth direction to automatically close the door.

[0063] Figures 22 to 25 This is a diagram illustrating the process of an automatically opening door.

[0064] Figures 26A to 26D This is a view showing the process of the moving part of the fifth gear moving into the slot of the transmission gear when the door closes automatically.

[0065] Figure 27 This is a control block diagram of a refrigerator according to the first embodiment.

[0066] Figure 28 and Figure 29 This is a diagram illustrating the process of manually opening a door.

[0067] Figure 30 This is a view showing the second input gear and the output gear according to the second embodiment.

[0068] Figure 31 This is a side view of the second input gear according to the third embodiment.

[0069] Figure 32 This is an exploded perspective view of the second input gear according to the third embodiment.

[0070] Figure 33 This is a plan view of the second input gear according to the third embodiment.

[0071] Figure 34 This is a plan view of the second gear portion according to the third embodiment.

[0072] Figure 35 This is a bottom view of the second input gear according to the third embodiment.

[0073] Figure 36 It is along Figure 33 The sectional view taken along line 36-36 shows the first gear section and the output gear in normal connection.

[0074] Figure 37 This is a view showing the relative motion between the first gear section and the second gear section when the first gear section interferes with the output gear. Detailed Implementation

[0075] In the following, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that when components in the drawings are indicated by reference numerals, the same components will have the same reference numerals as much as possible, even if the components are shown in different drawings. Furthermore, in the description of embodiments of the present disclosure, detailed descriptions will be omitted when it is determined that a detailed description of a well-known configuration or function would interfere with the understanding of the embodiments of the present disclosure.

[0076] Furthermore, in the description of embodiments of this disclosure, terms such as first, second, A, B, (a), and (b) may be used. Each term is used only to distinguish the corresponding component from other components and does not limit the nature, level, or order of the corresponding components. It should be understood that when a component is "connected," "joined," or "engaged" to another component, the former may be directly connected, joined, or engaged to the latter, or may be "connected," joined, or "engaged" to the latter with a third component in between.

[0077] In this specification, at least one of component A and component B can be interpreted as including component A, component B, or component A+B.

[0078] Furthermore, at least one of component A or component B can be interpreted as including component A, component B, or component A+B.

[0079] Figure 1 This is a perspective view showing a portion of a refrigerator according to a first embodiment. Figure 2 This is a plan view of the refrigerator according to the first embodiment.

[0080] Reference Figure 1 and Figure 2 According to this embodiment, the refrigerator 1 may include a cabinet 10 forming a storage space 12 and a door 20 for opening and closing the storage space 12.

[0081] Storage space 12 may include, for example, a refrigerator compartment. Alternatively, storage space 12 may include, for example, a freezer compartment. Alternatively, although not shown, storage space 12 may also include additional storage space.

[0082] Door 20 can be a refrigerator door or a freezer door. Door 20 may include a first door 21 for opening and closing a portion of the storage space 12. Door 20 may also include a second door 22 for opening and closing another portion of the storage space 12. Alternatively, a single door 20 may open and close a single storage space 12, or multiple storage spaces 12 may be opened and closed simultaneously.

[0083] Door 20 can be configured as a single door, or it can include a main door 23 and a sub-door 24.

[0084] As an example, Figure 2The first door 21 in door 20 is shown to consist of a main door 23 (or inner door) and a sub-door 24 (or outer door), but is not limited thereto, and the first door 21 may also consist of a single door.

[0085] The main door 23 can open and close the storage space 12, and the sub-door 24 can rotate relative to the main door 23. The sub-door 24 can be rotatably connected to the main door 23 or rotatably connected to the cabinet 10.

[0086] The refrigerator in this embodiment may also include a door opening and closing device 100 for opening the door 20. When the door 20 includes a plurality of doors 21 and 22, the door opening and closing device 100 may open some or all of the plurality of doors 21 and 22.

[0087] As an example, Figure 2 The door opening and closing device 100 is shown opening the first door 21 in the door 20.

[0088] In this embodiment, door 20 can be automatically opened by door opening and closing device 100. Alternatively, door 20 can be manually opened by the user.

[0089] The door opening and closing device 100 can be installed, for example, on the upper surface or the lower surface of the cabinet 10. A portion of the door opening and closing device 100 can be connected to the upper (or lower) side of the door 20.

[0090] When door 20 includes a main door 23 and a sub-door 24, a portion of the door opening and closing device 100 can be connected to the upper side of the main door 23. That is, when the door opening and closing device 100 is operated, the main door 23 can open automatically.

[0091] Figure 3 A gasket 40 can be placed between the door 20 and the cabinet 10 to limit the leakage of cold air from the storage space 12. For example, the gasket 40 is attached to the door 20. A magnet can be disposed inside the gasket 40. The gasket 40 can be kept in contact with the cabinet 10 by the magnet.

[0092] The door opening and closing device 100 of this embodiment will be described in detail below.

[0093] Figure 3 This is an enlarged view showing a door opening and closing device installed in a refrigerator according to the first embodiment. Figure 4 This is a diagram showing a portion of the power transmission section of the door opening and closing device according to the first embodiment. Figure 5 This is a cross-sectional view of the fifth gear used to transmit power to the first operating part. Figure 6A This is a perspective view of the transmission gears. Figure 6B This is a side view of the transmission gear.

[0094] Reference Figures 2 to 6BThe main door 23 can be rotatably connected to the cabinet 10 via a first hinge bracket 31. The upper surface of the main door 23 may include a downwardly recessed portion 23a. The first hinge bracket 31 can be connected to the recessed portion 23a.

[0095] The sub-door 24 can be rotatably connected to the main door 23 via the second hinge bracket 32.

[0096] The door opening and closing device 100 of this embodiment may include a driver 110. The driver 110 may include, for example, a motor capable of rotating in both directions. When the motor rotates in the forward direction, the door 20 can automatically open. After the door has automatically opened, when the motor rotates in the reverse direction, the door 20 can automatically close.

[0097] The door opening and closing device 100 may also include a power transmission unit 120 for transmitting power to the drive 110.

[0098] The door opening and closing device 100 may further include a first operating unit 170 (or a first door opening portion) which is operated by receiving power from the power transmission unit 120. The door opening and closing device 100 may further include a second operating unit 180 (or a second door opening portion) which is operated by receiving power from the power transmission unit 120.

[0099] During the automatic opening of door 20, the first operating unit 170 and the second operating unit 180 can be operated sequentially. The second operating unit 180 serves as a door closing part to close the door during the automatic closing process.

[0100] The door opening and closing device 100 may further include a first transmission unit that transmits power to the first operating unit 170. The door opening and closing device 100 may further include a second transmission unit that transmits power to the second operating unit 180.

[0101] The power transmission unit 120 may include a plurality of gears. The door opening and closing device 100 may include a frame 101. The plurality of gears may be rotatably supported by the frame 101. The frame 101 may cover at least a portion of the components constituting the door opening and closing device 100.

[0102] For example, multiple gears may include motor gears connected to the shaft of the drive 110.

[0103] The multiple gears may also include first to fifth gears 122, 123, 124, 125, and 130 that are connected to each other. However, it should be noted that this embodiment does not limit the number of multiple gears. In addition, it should be noted that the shape of the multiple gears is not limited.

[0104] The first gear 122 and the second gear 123 can be reduction gears. The third to fifth gears 124, 125 and 130 can be idler gears.

[0105] At least one of the third to fifth gears can be a second-stage gear with portions having different diameters.

[0106] The last gear among the multiple gears can be connected to the first transmission unit. For example, the fifth gear 130 can be connected to the first transmission unit.

[0107] The first transmission unit can transmit power to the first operating unit 170 during a portion of the automatic opening process of the door 20. For example, the first transmission unit can transmit power to the first operating unit 170 during the initial period of the automatic opening process. The first transmission unit can also block the transmission of power to the first operating unit 170 during another period of the automatic opening process. That is, the first transmission unit can block the transmission of power during the operation of the first operating unit 170.

[0108] The first transmission unit may include a transmission gear 140. The transmission gear 140 may be connected to the fifth gear 130.

[0109] The fifth gear 130 may include a movable part 135. The movable part 135 may be configured to be movable at a position spaced apart from the rotation center of the fifth gear 130. The movable part 135 may move in a direction parallel to the rotation center line of the fifth gear 130.

[0110] The fifth gear 130 may include a first portion 131 in which a moving portion 135 is received. The fifth gear 130 may also include a second portion 132 through which the moving portion 135 passes. The diameter of the first portion 131 may be larger than the diameter of the second portion 132.

[0111] The fifth gear 130 may also include a third portion 133 as an opening for inserting the moving part 135. The first portion 131 may be located between the second portion 132 and the third portion 133. The diameter of the third portion 133 may be equal to or greater than the diameter of the first portion 131.

[0112] The fifth gear 130 may also include a cover 137 for covering the third portion 133. The diameter of the cover 137 may be equal to or smaller than the diameter of the third portion 133. A portion of the cover 137 may be inserted into the first portion 131. The cover 137 may restrict the movement portion 135 from separating from the fifth gear 130 toward the third portion 133.

[0113] The portion of the moving part 135 that protrudes outward from the fifth gear 130 may include a circular surface. The circular surface may contact the transmission gear 140.

[0114] For example, the movable part 135 may be formed in a cylindrical shape. Based on the drawings, the upper surface of the movable part 135 may include a circular surface.

[0115] The movable portion 135 may further include an outwardly extending extension 135a. A portion of the movable portion 135 may pass through the second portion 132 and protrude outwardly from the fifth gear 130. The extension 135a may be engaged by a step formed by the diameter difference between the first portion 131 and the second portion 132. The extension 135a may move within the first portion 131.

[0116] The upward movement of the movable part 135 can be limited by the extension 135a. The downward movement of the extension 135a can be limited by the cover 137 or the elastic member 138 described below.

[0117] The fifth gear 130 may also include an elastic member 138 that provides a spring force to the moving part 135. The elastic member 138 can elastically support the moving part 135. The elastic member 138 may be, for example, a coil spring.

[0118] A groove 135b may be formed in the movable portion 135 to receive a portion of the elastic member 138. The other side of the elastic member 138 may be supported by a cover portion 137.

[0119] After the movable part 135 is moved downward by an external force, when the external force is removed, the movable part 135 can be moved upward by the elastic force of the elastic member 138.

[0120] The transmission gear 140 may have gear teeth 141 on a portion of its circumferential surface. Another portion of the transmission gear 140 without gear teeth 141 may have a slot 142, in which the moving part 135 is received. The slot 142 may pass through the transmission gear 140 in a direction parallel to its rotation center line. Alternatively, the slot 142 may be recessed inwards on its circumferential surface toward the rotation center of the transmission gear 140.

[0121] The movable part 135 can be selectively received in the slot 142. When the movable part 135 is received in the slot 142, the rotational force of the fifth gear 130 can be transmitted to the transmission gear 140. On the other hand, when the movable part 135 is removed from the slot 142, the rotational force of the fifth gear 130 is not transmitted to the transmission gear 140.

[0122] In this embodiment, the state in which the moving part 135 is received in the slot 142 can be referred to as the connection state between the fifth gear 130 and the transmission gear 140. In the connection state between the fifth gear 130 and the transmission gear 140, when the fifth gear 130 rotates, the transmission gear 140 can rotate together.

[0123] The state in which the moving part 135 is removed from the slot 142 can be referred to as the disengaged state of the fifth gear 130 and the transmission gear 140. In the disengaged state of the fifth gear 130 and the transmission gear 140, even if the fifth gear 130 rotates, the transmission gear 140 may not rotate.

[0124] The transmission gear 140 may also include a recess 143 disposed on one side of the slot 142. The recess 143 may communicate with the slot 142.

[0125] The recess 143 can provide a path or space through which a movable part 135, located outside the slot 142, can be inserted into the slot 142. One surface forming the recess 143 in the transmission gear 140 may include an inclined surface 144. The inclined surface 144 may be inclined such that the depth of the recess 143 as it recesses upward from the bottom surface decreases toward the slot 142. The movable part 135 may contact the inclined surface 144.

[0126] The transmission gear 140 can be connected to the elastomer 149. In order to open the door 20, the transmission gear 140 can rotate in another direction. When the transmission gear 140 rotates in another direction, when the moving part 135 is removed from the slot 142, the elastomer 149 can provide a spring force, causing the transmission gear 140 to return to its initial position in one direction.

[0127] The elastic body 149 can be, for example, a torsion spring, but it should be noted that there is no limitation on the type of spring. The transmission gear 140 may be provided with a connecting part 146, to which the elastic body 149 is connected.

[0128] For example, the elastomer 149 can also provide a spring force to the first operating part 170. In this case, when the moving part 135 is removed from the slot 142, the elastomer 149 can provide a spring force, causing the first operating part 170 to return to its initial position. During the process of returning the first operating part 170 to its initial position, the transmission gear 140 can return to its initial position in one direction.

[0129] In this embodiment, the first transmission unit is used as a clutch, which transmits power to or prevents the transmission of power to the first operating part 170 during the automatic opening of the door 20, and therefore can be called the first clutch unit.

[0130] The first operating part 170 can engage with the transmission gear 140. The first operating part 170 can be composed of a single component or multiple components.

[0131] For example, the first operating part 170 may include a first component 171 that engages with the transmission gear 140 and a second component 176 that is rotatably connected to the first component 171.

[0132] The first component 171 may include a rack 172. When the transmission gear 140 rotates, the first component 171 can move linearly. The door opening and closing device 100 may also include a guide portion 104 for guiding the movement of the first component 171. The guide portion 104 may be integrally formed with the frame 101 or may be connected to the frame 101.

[0133] The second member 176 can be rotatably connected to the first member 171 via a shaft 174. The second member 176 can contact the door 20 during the automatic opening process of the door. A portion of the second member 176 may include a portion whose width or thickness increases with the distance from the shaft 174.

[0134] The second transmission unit may include a first transmission section 150. The first transmission section 150 may be connected to the fifth gear 130.

[0135] The first transmission unit 150 may include a first part 150a and a second part 150b, which are distinguished by the presence or absence of gear teeth on the circumferential surface.

[0136] There are no gear teeth on the circumferential surface of the first part 150a. Gear teeth 152 are present on the circumferential surface of the second part 150b. That is, the first transmission part 150 can be a partial gear. The second part 150b can mesh with the fifth gear 130.

[0137] The second transmission unit may further include a second transmission section 154. The second transmission section 154 may be connected to the first transmission section 150 during the automatic opening of the door 20. On the other hand, during the manual opening of the door 20, the second transmission section 154 may be spaced apart from the first transmission section 150.

[0138] When the door 20 is closed, the first part 150a can be positioned facing or corresponding to the second transmission part 154.

[0139] When the driver 110 is operated, the first transmission unit 150 can rotate. When a predetermined time has elapsed since the driver 110 starts operating or the first transmission unit 150 rotates a predetermined angle, the second part 150b is connected to the second transmission unit 154, so that the second transmission unit 154 can rotate.

[0140] The state in which the second part 150b is connected to the second transmission part 154 can be referred to as the connected state of the first transmission part 150 and the second transmission part 154. The state in which the second part 150b is not connected to the second transmission part 154 can be referred to as the disconnected state of the first transmission part 150 and the second transmission part 154. The position of the first transmission part 150 in the disconnected state can be referred to as the disconnected position. During the automatic opening process of the door 20, the first transmission part 150 can move to the connected position, so that the first transmission part 150 and the second transmission part 154 can be connected.

[0141] The second transmission unit may further include a third transmission section 160. The third transmission section 160 may be connected to the second transmission section 154. The third transmission section 160 may be connected to the second operating section 180. The third transmission section 160 may transmit the rotational force of the second transmission section 154 to the second operating section 180.

[0142] The third transmission unit 160 may include, for example, a body 161 formed in a fan shape. Gear teeth 163 may be formed on one surface of the body 161.

[0143] Another surface of the main body 161 may be provided with a connecting portion 162, and a shaft 107 providing a center of rotation is connected to the connecting portion 162. The shaft 107 may be provided at the first hinge bracket 31, or it may be provided on a member 106 separate from the first hinge bracket 31. At least a portion of the third transmission portion 160 may overlap with the first hinge bracket 31 in the vertical direction.

[0144] The third transmission unit 160 may further include a connecting portion 165 for connecting to the second operating unit 180. The second operating unit 180 may be rotatably connected to the third transmission unit 160 at a position spaced apart from the rotation center of the third transmission unit 160.

[0145] The third transmission part 160 may include one or more holes. The one or more holes can increase the strength of the third transmission part 160. The weight of the third transmission part 160 can be reduced through the one or more holes.

[0146] When multiple holes are formed in the third transmission unit 160, the multiple holes can also be used to detect the position of the third transmission unit 160 by a position detection sensor.

[0147] The second operating unit 180 may include a main body 181 (or a connecting rod). The main body 181 may extend from the cabinet 10 toward the door 20.

[0148] The second operating part 180 may include a first connecting part 182 disposed on one side of the main body 181. The first connecting part 182 may be rotatably connected to a shaft 33 disposed on the door 20 (e.g., the main door). Alternatively, the first connecting part 182 may also have a shaft. The first connecting part 182 may be positioned in a recess 23a of the main door 23. The shaft 33 may be disposed at the first hinge bracket 31, or may be disposed at a separate member spaced apart from or connected to the first hinge bracket 31.

[0149] The main body 181 can be formed into a straight shape or a shape that bends once or multiple times. When the door 20 is closed, the first connecting part 182 can be positioned near the rotation center C1 of the door 20 (or the rotation center of the main door). For example, when the door 20 is closed, the first connecting part 182 can be positioned closer to the cabinet 10 or the washer 40 than the rotation center C1 of the door 20.

[0150] The second operating unit 180 may include a second connecting part 183 disposed on the other side of the main body 181. The second connecting part 183 may be connected to the third transmission part 160.

[0151] By means of the shape of the first transmission unit 150, the second transmission unit can transmit the power of the driver 110 to the second operating unit 180 during the automatic opening and closing of the door 20, and act as a clutch during the manual opening and closing of the door 20 to prevent the transmission of the motion power of the second operating unit 180 to the driver 110. Therefore, the second transmission unit can be called a second clutch unit.

[0152] Figure 7 This is a perspective view showing the clutch device of the first embodiment. Figure 8 This is a front view showing the clutch device according to the first embodiment. Figure 9 This is an exploded perspective view of the clutch device according to the first embodiment. Figure 10 It is along Figure 7 The sectional view taken from line 10-10. Figure 11 This is a view showing the inclined surfaces of the second input gear and the first output gear according to the first embodiment.

[0153] Reference Figures 7 to 11 One of the multiple gears constituting the power transmission unit 120 may include a clutch device (or clutch gear assembly).

[0154] When the drive 110 stops, the clutch device can prevent power transmission between the drive 110 and the second transmission unit.

[0155] For example, after the automatic opening of door 20 is complete, the actuator 110 may stop before the automatic closing operation of door 20 begins. Alternatively, the actuator 110 may stop unintentionally during the automatic opening process of door 20.

[0156] When the door 20 automatically opens, the first transmission unit 150 and the second transmission unit 154 are connected. If a clutch mechanism is not present, the first transmission unit 150 is connected to the actuator 110 via the power transmission unit 120. Therefore, when the user manually closes the door 20, the closing force of the door 20 can be transmitted to the actuator 110. In this case, there is a possibility that the actuator 110 may be damaged, or that the door 20 may not close smoothly or gently due to gear resistance. Furthermore, even if the first transmission unit 150 and the second transmission unit 154 are connected, the closing force of the door 20 can still be transmitted to the actuator 110 when the user manually closes the door 20, even if the actuator 110 stops unintentionally during operation.

[0157] On the other hand, when the power transmission unit 120 includes a clutch device, the connection between the drive 110 and the first transmission unit 150 is released even if the drive 110 stops after operation or during operation. Therefore, even when the user manually closes the door, the closing force of the door 20 is not transmitted to the drive 110, and the door 20 can be closed manually and smoothly.

[0158] The clutch mechanism will be described in detail below.

[0159] At least two adjacent gears among the plurality of gears constituting the power transmission unit 120 may constitute a clutch device.

[0160] The clutch assembly may include an input gear assembly 300 (or input unit) and an output gear assembly 400 (or output unit).

[0161] Any one of the first gear 122 to the fourth gear 125 can be the input gear assembly 300.

[0162] Any of the second to fifth gears 123, 124, 125 and 130 adjacent to the input gear assembly 300 can be the output gear assembly 400.

[0163] When the driver 110 is operating, the input gear assembly 300 and the output gear assembly 400 can be connected. On the other hand, when the driver 110 stops, the connection between the input gear assembly 300 and the output gear assembly 400 can be released.

[0164] The input gear assembly 300 may include a first input gear 310. The first input gear 310 can rotate when the driver 110 is operated. The first input gear 310 can remain connected to the driver 110.

[0165] The input gear assembly 300 may include a shaft 330 that rotates together with the first input gear 310. The shaft 330 may be coupled to pass through the first input gear 310.

[0166] The input gear assembly 300 may also include a second input gear 320 (or clutch gear) spaced apart from the first input gear 310 (or input gear) in the axial direction of the shaft 330.

[0167] When the first input gear 310 rotates, the second input gear 320 can move in the axial direction of the shaft 330.

[0168] The second input gear 320 can be directly coupled to the shaft 330. A screw 332, or a screw-shaped groove or protrusion, can be formed on the shaft 330. Screw-shaped or screw-type protrusions or grooves corresponding to the shape of the shaft 330 can also be formed on the surface of the second input gear 320 that is coupled to the shaft 330. Therefore, when the shaft 330 rotates, the second input gear 320 can move in the axial direction of the shaft 330.

[0169] Alternatively, the second input gear 320 can be coupled to the shaft 330 via a connecting member 340. A screw 332, or a screw-shaped groove or protrusion, can be formed on the shaft 330. A screw 346, or a screw-shaped protrusion or groove corresponding to the shape of the shaft 330, can also be formed on the surface of the connecting member 340 that is coupled to the shaft 330. Therefore, when the shaft 330 rotates, the second input gear 320 coupled to the connecting member 340 can move in the axial direction of the shaft 330.

[0170] The connecting member 340 may include an insertion portion 344 that is inserted into the second input gear 320. For example, the insertion portion 344 may pass through the second input gear 320 and protrude downward from the second input gear 320.

[0171] The connecting member 340 may also include an extension 342 extending horizontally from the insertion portion 344. With the insertion portion 344 passing through the second input gear 320, the extension 342 may be positioned above the second input gear 320.

[0172] As another example, shaft 330 may include a worm gear. Connecting member 340 or second input gear 320 may also include a gear capable of engaging the worm gear, such that the second input gear 320 is movable in the axial direction of shaft 330.

[0173] When the driver 110 operates in the forward direction, the second input gear 320 can move upward relative to the drawing. Conversely, when the driver 110 operates in the opposite direction, the second input gear 320 can move downward relative to the drawing. Of course, the direction of movement of the second input gear 320 can also be reversed.

[0174] The input gear assembly 300 may also include a first elastic member 350 and a second elastic member 360.

[0175] The second elastic member 360 can be positioned between the second input gear 320 and the first input gear 310. The second input gear 320 can be positioned between the first elastic member 350 and the second elastic member 360.

[0176] For example, refer to Figure 10 The first elastic member 350 can be positioned above the second input gear 320. The second elastic member 360 can be positioned below the second input gear 320.

[0177] The first elastic member 350 may be, for example, a helical spring. The first elastic member 350 may be configured to surround the axis 330.

[0178] One end of the first elastic member 350 may be placed on the upper surface of the connecting member 340, or may be placed on the washer 374 that contacts the upper surface of the connecting member 340.

[0179] The other end of the first elastic member 350 can contact the stop 380 connected to the shaft 330. The stop 380 can restrict the upward movement of the first elastic member 350.

[0180] When the drive 110 stops, the first elastic member 350 can restrict the upward movement of the second input gear 320 as it returns to its initial position due to rotational inertia.

[0181] The second elastic member 360 can be, for example, a coil spring. The second elastic member 360 can be configured to surround the shaft 330. One end of the second elastic member 360 can be supported by a washer 370 connected to the shaft 330. For example, the washer 370 can be placed on the upper side of the first input gear 310. Of course, the washer 370 can also be omitted.

[0182] The other end of the second elastic member 360 can support the lower surface of the connecting member 340. Alternatively, the other end of the second elastic member 360 can also support the washer 372 that contacts the lower surface of the connecting member 340.

[0183] When the drive 110 stops, the second elastic member 360 can restrict the downward movement of the second input gear 320 as it returns to its initial position due to rotational inertia.

[0184] In this specification, either the upward or downward direction of the second input gear 320 can be referred to as the third direction, and the other can be referred to as the fourth direction.

[0185] The output gear assembly 400 may include a first output gear 410 and a second output gear 420. The first output gear 410 and the second output gear 420 may have the same center of rotation. The output gear assembly 400 may include a coupling hole to which a shaft (not shown) is coupled. The shafts or centers of rotation of the first output gear 410 and the second output gear 420 (or the output gear assembly) may be horizontally spaced from the shafts or centers of rotation of the first input gear 310 (or the input gear assembly).

[0186] The first output gear 410 and the second output gear 420 can be spaced apart from each other, for example, in the vertical direction, and can be connected by the connecting part 430. Therefore, the first output gear 410 and the second output gear 420 can rotate together.

[0187] like Figure 8 As shown, when the driver 110 stops, the second input gear 320 can be kept in the initial position by the first elastic member 350 and the second elastic member 360.

[0188] At the initial position of the second input gear 320, the connection between the first output gear 410 and the second input gear 320 can be released.

[0189] For example, the first output gear 410 can be connected to the second input gear 320, which moves upward when the driver 110 operates in the forward direction. When the first output gear 410 is connected to the second input gear 320, power from the driver 110 can be transmitted to the first output gear 410 through the second input gear 320.

[0190] For example, the second output gear 420 can be connected to the second input gear 320, which moves downward when the driver 110 operates in the opposite direction. When the second output gear 420 is connected to the second input gear 320, power from the driver 110 can be transmitted to the second output gear 420 through the second input gear 320.

[0191] The second input gear 320 may include a plurality of gear teeth 321. A first inclined surface 322 may be formed at the portion (e.g., the upper portion) of each gear tooth 321 facing the first output gear 410, such that the second input gear 320 is smoothly connected to the first output gear 410.

[0192] The first output gear 410 may also include a plurality of gear teeth 412, and an inclined surface 413 may be formed at a portion (e.g., the lower portion) of each gear tooth 412 facing the gear tooth 321 of the second input gear 320.

[0193] When the first inclined surface 322 and the inclined surface 413 of the first output gear 410 come into contact with each other and the second input gear 320 moves upward, the second input gear 320 can rotate naturally relative to the first output gear 410, so that the gear teeth 321 of the second input gear 320 can mesh with the gear teeth 412 of the first output gear 410.

[0194] With the second input gear 320 and the first output gear 410 connected, the upward movement of the second input gear 320 can be restricted. Therefore, when the second input gear 320 rotates, the first output gear 410 can rotate.

[0195] The second inclined surface 323 may be formed at the portion (e.g., the lower portion) of each gear tooth 321 facing the second output gear 420, such that the second input gear 320 is smoothly connected to the second output gear 420.

[0196] The second output gear 420 may include a plurality of gear teeth 422, and an inclined surface 423 may be formed at a portion (e.g., the upper portion) of each gear tooth 422 facing the gear tooth 321 of the second input gear 320.

[0197] When the second inclined surface 323 and the inclined surface 423 of the second output gear 420 come into contact with each other and the second input gear 320 moves downward, the second input gear 320 can rotate naturally relative to the second output gear 420, so that the gear teeth 321 of the second input gear 320 can mesh with the gear teeth 422 of the second output gear 420.

[0198] With the second input gear 320 and the second output gear 420 connected, the downward movement of the second input gear 320 can be restricted. Therefore, when the second input gear 320 rotates, the second output gear 420 can rotate.

[0199] The process of opening and closing the door will be described below.

[0200] Figure 12 This is a view showing the second input gear moving upwards on the third side to automatically open the door, and Figures 13 to 20 It is a view showing the process of the door opening automatically.

[0201] Figure 21 This is a view showing the state in which the second input gear moves in the fourth direction to automatically close the door. Figures 22 to 25 This is a diagram illustrating the process of an automatically opening door. Figures 26A to 26D This is a view showing the process of the moving part of the fifth gear moving into the slot of the transmission gear when the door closes automatically. Figure 27 This is a control block diagram of a refrigerator according to the first embodiment.

[0202] Reference Figures 3 to 27 The refrigerator in this embodiment may further include a controller 200. The controller 200 may be installed at or spaced apart from the object for control purposes. The controller 200 may be located inside or outside the object for control purposes.

[0203] For example, the controller 200 can be installed in the cabinet 10 or the door 20.

[0204] The controller 200 can control the drive 110. The controller 200 can be located outside the drive 110. The controller 200 can control the drive 110 independently, or it can control other components in the refrigerator besides the drive 110.

[0205] The refrigerator 1 may also include an input unit 210. The input unit 210 can input a door opening command for opening the door 20.

[0206] The input unit 210 may include a touch sensor for detecting a user's touch on the front surface of the door 20, or a tap sensor for detecting multiple taps applied to the front surface of the door 20. Optionally, the input unit 210 may include a capacitive sensor, a vibration detection sensor, or an acoustic wave detection sensor. Alternatively, the input unit 210 may include a mechanical button or a touchscreen through which user commands can be input. Because the input unit 210 can receive or detect user commands, it may also be referred to as an input detection unit.

[0207] The input unit 210 can be located at the cabinet 10 or the door 20.

[0208] The refrigerator 1 may also include a sensor component 220. The sensor component 220 can detect the opening and closing of the door 20. The sensor component 220 can be located in the cabinet 10 or the door 20.

[0209] The actuator 110 for automatically opening the door 20 can be operated even when the door 20 is closed. That is, the actuator 110 can operate when an automatic opening command is input to the door 20, while the sensor section 220 detects that the door 20 is closed.

[0210] With door 20 closed, the first operating unit 170 and the second operating unit 180 can be in their initial positions. With driver 110 stopped, the second input gear 320 can be in its initial position.

[0211] In its initial position, the first operating part 170 may be spaced apart from the rear surface of the door 20. The transmission gear 140 may be located between the first operating part 170 and the second operating part 180. The second operating part 180 may be positioned closer to the rotation center C1 of the door 20 than the first operating part 170.

[0212] In the initial position of the second operating unit 180, the second connecting part 183 can be positioned further away from the front surface of the cabinet 10 than the first operating unit 170. The driver 110 can be positioned further away from the front surface of the cabinet 10 than the second connecting part 183.

[0213] [The process of automatically opening and closing the door]

[0214] With door 20 closed, a door opening command can be input via input unit 210. Then, controller 200 can control drive 110 to automatically open door 20.

[0215] refer to Figure 13 The controller 200 can cause the driver 110 to operate in the forward direction. For example, the controller 200 can cause the motor to rotate in the forward direction. When the motor rotates in the forward direction, the power of the motor can be transmitted to the first operation unit 170 through the power transmission unit 120 and the first transmission unit.

[0216] When the driver 110 stops, the second input gear 320 is positioned in the initial position, and when the driver 110 operates in the forward direction, such as Figure 12 As shown, the second input gear 320 does not rotate due to its stationary inertia, causing it to move in a third direction to connect with the first output gear 410. Therefore, when the driver 110 operates in the forward direction, power from the driver 110 can be transmitted to the first operating unit 170 via the first output gear 410. The second input gear 320 can transmit power to the first output gear 410 in a horizontal direction. Therefore, the rotational direction of the second input gear 320 and the rotational direction of the first output gear 410 (or the output gear assembly) can be opposite to each other. Alternatively, the input gear assembly can transmit power to the output gear assembly in a direction intersecting the axial direction of the shaft 330.

[0217] In the initial position of the first transmission section 150, the first transmission section 150 and the second transmission section 154 are in a disengaged state. Therefore, even if the driver 110 operates in the forward direction and the first transmission section 150 rotates, the second transmission section 154 remains stationary. With the second transmission section 154 stationary, the third transmission section 160 and the second operation section 180 also remain stationary.

[0218] For the operation of the first operating unit 170, the fifth gear 130 can rotate in one direction (clockwise in the figure), and the transmission gear 140 can rotate in another direction (counterclockwise in the figure). When the transmission gear 140 rotates in the other direction, the first operating unit 170 moves from the initial position to the end position in the first direction (e.g., the front-back direction) (the door opening direction).

[0219] like Figure 14 As shown, when the first operating part 170 moves along the first direction, the first operating part 170 can contact the rear surface of the door 20. Even when the first operating part 170 is in contact with the rear surface of the door 20, the second operating part 180 remains stationary.

[0220] like Figure 15 As shown, when the first operating unit 170 moves further in the first direction, the first operating unit 170 pushes the door 20, causing the door 20 to rotate automatically in the opening direction. Therefore, at least a portion of the washer 40 begins to space away from the cabinet 10.

[0221] like Figure 16 As shown, when the first operating part 170 moves in the first direction, the door 20 rotates further in the opening direction, so that the washer 40 is completely separated from the cabinet 10.

[0222] In this embodiment, the operation of the first operating unit 170 causes the washer 40 to separate from the cabinet 10 in the initial stage when the door 20 is automatically opened.

[0223] The second operating unit 180 may remain inactive until the washer 40 is completely separated from the cabinet 10 by the operation of the first operating unit 170. Alternatively, the second operating unit 180 may operate after a portion of the washer 40 has separated from the cabinet 10. In either case, the second operating unit 180 may operate after a set time has elapsed or after the first operating unit 170 has moved a set distance following the operation of the first operating unit 170.

[0224] refer to Figure 17 Even after a portion of the gasket 40 has separated from the cabinet 10, the first operating part 170 can still move further along the first direction. In such cases... Figure 17In the state shown, the first transmission unit 150 can engage with the second transmission unit 154, allowing the second transmission unit 154 to rotate.

[0225] When the automatic opening of door 20 begins and the first transmission unit 150 rotates at an angle equal to or greater than a predetermined angle, the second part 150b can engage with the second transmission unit 154, allowing the rotational force of the first transmission unit 150 to be transmitted to the second transmission unit 154. When the second transmission unit 154 rotates, the third transmission unit 160 also rotates, causing the second operating unit 180 to move along the door opening direction. After the second operating unit 180 begins operation, the opening angle of door 20 can be increased.

[0226] The second operating unit 180 can move from the initial position to the door-open position in the door opening direction. The second operating unit 180 can also move from the door-open position to the initial position in the door-closing direction.

[0227] As the second operating unit 180 moves along the door opening direction, the door 20 is separated from the first operating unit 170. When the first operating unit 170 and the door 20 are separated from each other, the first operating unit 170 can no longer apply force to the door 20.

[0228] like Figure 17 and Figure 18 As shown, in some parts of the automatic opening process of door 20, the first operating unit 170 can be operated together with the second operating unit 180. That is, the first operating unit 170 can move toward the end position in a first direction, and the second operating unit 180 can move to the door open position.

[0229] During the automatic opening of door 20, the fifth gear 130 can rotate in only one direction. For example... Figure 18 As shown, with the moving part 135 of the fifth gear 130 received in the slot 142 of the transmission gear 140, when the fifth gear 130 rotates in one direction, the transmission gear 140 rotates in the other direction.

[0230] When the transmission gear 140 rotates in another direction, the first operating part 170 moves in the first direction.

[0231] Reference Figure 19 During the rotation of the fifth gear 130 in one direction, the moving part 135 can be removed from the slot 142 of the transmission gear 140. The point at which the moving part 135 is removed from the slot 142 of the transmission gear 140 can be the end position of the first operating part 170.

[0232] When the moving part 135 is removed from the slot 142 of the transmission gear 140, the rotational force of the fifth gear 130 is not transmitted to the transmission gear 140. That is, the connection between the fifth gear 130 and the transmission gear 140 can be released.

[0233] Therefore, the transmission gear 140 rotates in one direction by the elastic force of the elastic body 149 to return to the initial position.

[0234] As the transmission gear 140 rotates in one direction, the first operating part 170 moves from the end position to the initial position in the second direction.

[0235] Reference Figure 20 When the second operating unit 180 moves continuously along the door opening direction and reaches the door open position, the opening angle of the door 20 becomes its maximum value. In this embodiment, the maximum opening angle of the door 20 can be greater than 90 degrees.

[0236] When the maximum opening angle of the door 20 is 90 degrees or greater, there is an advantage that the user can easily access the storage space 12 even without having to manually open the door 20.

[0237] At the same time, after the door 20 has been opened automatically, the drive 110 can be stopped before the door 20 is closed automatically.

[0238] When the driver 110 stops, the second input gear 320 continues to rotate due to its rotational inertia and can therefore return to its initial position. That is, the connection between the second input gear 320 and the first output gear 410 can be released.

[0239] Alternatively, after the automatic opening of the door 20 is complete, the motor can rotate in the opposite direction by a predetermined angle or for a predetermined time, and then stop, so that the connection between the second input gear 320 and the first output gear 410 is smoothly released.

[0240] With the connection between the second input gear 320 and the first output gear 410 released, the user can manually close the door 20, and during the manual closing of the door 20, the transmission of the closing force of the door 20 to the actuator 110 can be prevented. Therefore, after the door 20 opens automatically, damage to the actuator 110 or gears is prevented during the user's manual closing of the door 20, and the door 20 can be closed smoothly.

[0241] After the automatic opening of door 20 is complete and the drive 110 is in a stopped state, for the automatic closing of door 20, when a closing command for door 20 is detected or recognized, such as when a set time has elapsed since door 20 opened, when no user has been detected since door 20 opened, or when a separate door closing command is entered, controller 200 can cause drive 110 to operate in the opposite direction. That is, controller 200 can control the motor to rotate in reverse.

[0242] When the motor rotates in the reverse direction, such as Figure 20 As shown, the second input gear 320 moves in the fourth direction due to its stationary inertia, allowing it to connect to the second output gear 420. The second input gear 320 can transmit power to the second output gear 420 in a horizontal direction. Therefore, the rotation direction of the second input gear 320 and the rotation direction of the second output gear 420 (or the output gear assembly) can be opposite to each other.

[0243] When the motor rotates in the reverse direction, the motor's power is transmitted to the second transmission unit, allowing the second operating unit 180 to move from the door-open position to the initial position along the door-closing direction.

[0244] Since the connection between the fifth gear 130 and the transmission gear 140 is released during the opening of the door 20, the first operating part 170 and the transmission gear 140 remain in a stopped state, while the motor rotates in the opposite direction.

[0245] Reference Figures 24 to 26D During the reverse rotation of the motor, the fifth gear 130 rotates in the other direction.

[0246] During the rotation of the fifth gear 130 in another direction, the moving part 135 can be aligned with the recess 143, such as Figure 26A As shown. When the fifth gear 130 rotates in another direction, the recess 143 of the moving part 135 contacts the inclined surface 144. (See reference...) Figure 26B and Figure 26C During the rotation of the fifth gear 130 in the opposite direction, the moving part 135 is pressed down by the inclined surface 144 and moves downward. As the moving part 135 moves downward, the elastic member 148 can retract. Then, refer to... Figure 26D When the moving part 135 is aligned with the slot 142, the elastic member 148 extends, and the moving part 135 is inserted into the slot 142 by the elastic force of the elastic member 148. The motor can stop at the moment when the moving part 135 is inserted into the slot 142 or after the moving part 135 is inserted into the slot 142.

[0247] According to this embodiment, in the initial stage of automatic door opening, the motor's power is transmitted to the first operating unit and used for the separation of the gasket, and during or after the separation of the gasket, the power is used as the door opening force. Therefore, the advantage is that the door gasket can be easily separated in the initial stage of door opening.

[0248] Moreover, in this embodiment, the door not only opens automatically but also closes automatically, thereby improving user convenience.

[0249] Furthermore, in this embodiment, after the door opens automatically or during drive operation, when the drive stops, the clutch mechanism prevents power transmission to the drive. Therefore, damage to the drive or gears is prevented during manual door opening, and the door can close smoothly.

[0250] [The process of manually opening the door]

[0251] Figure 28 and Figure 29 This is a diagram illustrating the process of manually opening a door.

[0252] refer to Figure 28 and Figure 29 Users can manually open door 20 when it is closed.

[0253] As described above, when the door 20 is closed, the first transmission unit 150 and the second transmission unit 154 are in a disconnected state, so that even if the second transmission unit 154 rotates, the rotation of the first transmission unit 150 is restricted. In the disconnected state of the first transmission unit 150 and the second transmission unit 154, the first transmission unit 150 can be in a disconnected position.

[0254] When a user grasps the handle of door 20 and pulls door 20, door 20 can rotate. As door 20 rotates in the opening direction, a second operating part 180 connected to door 20 moves together with door 20. During manual opening of door 20, the second operating part 180 can be moved to the open position by the rotational force of door 20.

[0255] When the second operating unit 180 moves together with the door 20, the third transmission unit 160 connected to the second operating unit 180 rotates. When the third transmission unit 160 rotates, the second transmission unit 154 also rotates. However, since the first transmission unit 150 is in the disengaged position, it does not rotate even when the second transmission unit 154 rotates. Therefore, during the manual opening of the door 20, the manual rotational force of the door 20 is not transmitted to the first transmission unit 150. Since the rotational force of the door 20 is also not transmitted to the actuator 110, it is possible to prevent the application of load to the actuator 110. Furthermore, since the rotational force of the door 20 is not transmitted to the first transmission unit and the power transmission unit 120 during the manual opening of the door 20, damage to the gears is prevented, and noise due to gear rotation is prevented.

[0256] Even as the user closes the door 20, the second transmission unit 154 rotates, but the first transmission unit 150 can remain stationary.

[0257] Meanwhile, considering the weight of the door or the strength of the magnet's magnetic force, the first transmission unit and the first operating unit can also be omitted.

[0258] Figure 30 This is a view showing the second input gear and the output gear according to the second embodiment.

[0259] Except for the structural differences in the gear teeth of the second input gear and the output gear, this embodiment is the same as the first embodiment in all other respects. Therefore, in the following description, only the characteristic parts of this embodiment will be described.

[0260] Reference Figure 30 In this embodiment, the clearance between two adjacent teeth 321a of the second input gear can be increased to facilitate a smooth connection between the second input gear and the output gear. Furthermore, the clearance between two adjacent teeth 412a of the output gear can be increased.

[0261] Although not restricted, the clearance between the two gear teeth 321a in the second input gear can be greater than the maximum width of each gear tooth 321a. The clearance between the two gear teeth 412a in the output gear can be greater than the maximum width of each gear tooth 412a.

[0262] However, to achieve power transmission between the second input gear and the output gear, the change in gear tooth length can be considered in response to the change in gear tooth width. That is, the gear teeth of the second input gear and the output gear can be designed such that power transmission is possible while reducing interference between the second input gear and the output gear.

[0263] Figure 31This is a side view of the second input gear according to the third embodiment. Figure 32 This is an exploded perspective view of the second input gear according to the third embodiment. Figure 33 This is a plan view of the second input gear according to the third embodiment. Figure 34 This is a plan view of the second gear portion according to the third embodiment.

[0264] Figure 35 This is a bottom view of the second input gear according to the third embodiment. Figure 36 It is along Figure 33 The sectional view taken along line 36-36 shows the first gear section and the output gear in normal connection. Figure 37 This is a view showing the relative motion between the first gear section and the second gear section when the first gear section interferes with the output gear.

[0265] This embodiment is the same as the previous embodiment in all other respects, except that the structure of the second input gear is different. Therefore, in the following text, only the characteristic parts of this embodiment will be described.

[0266] refer to Figures 31 to 37 In this embodiment, the second input gear 500 can be designed to smoothly release the interference when it interferes with the output gears 410 and 420, and to achieve a smooth connection after the interference is released.

[0267] For example, the second input gear 500 may include a relatively movable first gear portion 510 and a second gear portion 550.

[0268] The first gear portion 510 can be connected to the shaft 330 of the previous embodiment, and the second gear portion 550 can be rotatably connected to the first gear portion 510. The second gear portion 550 can be connected to at least one of the first output gear 410 or the second output gear 420.

[0269] The first gear portion 510 may include a connecting body 512 that protrudes toward the second gear portion 550 at its central portion. A connecting hole 514 for connecting shaft 330 may be formed at the connecting body 512.

[0270] A hook 520 for engagement with the second gear portion 550 may be provided radially outward of the engagement hole 514. The hook 520 can be engaged with the second gear portion 550 by passing through a hook hole 552 formed in the center portion of the second gear portion 550.

[0271] The hook 520 can protrude from the connecting body 512 toward the second gear portion 550. For example, multiple hooks 520 can be arranged to be spaced apart from each other along the circumference of the connecting hole 514.

[0272] The first gear portion 510 may include a plurality of elastic bodies 530. The plurality of elastic bodies 530 may be arranged to be spaced apart from each other along the circumference of the connecting hole 514. Each elastic body 530 may be, for example, a helical spring, and may be arranged to extend radially from the connecting hole 514.

[0273] The connecting body 512 may include a support member 541. The support member 541 may support the elastomer 530.

[0274] The support member 541 may include a support protrusion 542 extending from the support member 541 toward the connection hole 514. The support protrusion 542 may be inserted into the space formed by the elastomer 530 to support the elastomer 530.

[0275] The portion of the first gear portion 510 surrounding the support member 541 can be formed by cutting away, so that the support member 541 can be elastically deformed by external force.

[0276] The support member 541 may include a contact protrusion 544 extending from the support member 541 in a direction away from the coupling hole 514. The contact protrusion 544 may contact the second gear portion 550.

[0277] The second gear portion 550 may include a main body 551 and an extension 553 extending from the main body 551 toward the first gear portion 510.

[0278] A hook hole 552 may be formed at the main body 551. Multiple gear teeth 558 may be formed on the outer circumferential surface of the extension 553.

[0279] The cam portion 554 may be disposed on the inner circumferential surface of the extension 553. The cam portion 554 may protrude from the extension 553 toward the center portion of the second gear portion 550.

[0280] The cam portion 554 may include spaced-apart recessed portions 555 and a connecting portion 556 connecting two adjacent recessed portions 555. The connecting portion 556 may include a straight portion or a curved portion. The distance between the connecting portion 556 and the hook hole 552 may be less than the distance between the recessed portion 555 and the hook hole 552.

[0281] When the first gear portion 510 and the second gear portion 550 are connected, the contact protrusion 544 of the first gear portion 510 can be positioned in the recessed portion 555. With the contact protrusion 544 positioned in the recessed portion 555, the first gear portion 510 and the second gear portion 550 can rotate together.

[0282] On the other hand, such as Figure 37As shown, while the second gear portion 550 interferes with the output gears 410 and 420 and the second gear portion 550 moves in the axial direction, the first gear portion 510 can rotate relative to the second gear portion 550.

[0283] When the controller 200 determines that interference is detected between the second gear section 550 and the output gear, the controller 200 can control the motor to perform one or more forward and reverse rotations. In this case, during the forward / reverse rotation of the second gear section 550, the contact protrusion 544 can move from the recessed portion 555 to the connecting portion 556, and the support member 541 can elastically deform.

[0284] During the process of the elastically deformed support 541 returning to its original shape via the elastic body 530, the contact protrusion 544 can move to the original recess 555 or to an adjacent recess 555. In either case, during the process of the elastically deformed support 541 returning to its original shape, the first gear portion 510 and the second gear portion 550 move relative to each other, and as the interference between the second gear portion 550 and the output gear is released, the second gear portion 550 and the output gear can be engaged.

[0285] In this embodiment, depending on the position or diameter of the first gear portion 510 and the second gear portion 550, only the second gear portion 550 can be connected to the first output gear 410 and the second output gear 420; or the second gear portion 550 can be connected to the first output gear 410 and the first gear portion 510 can be connected to the second output gear 420; or the first gear portion 510 can be connected to the first output gear 410 and the second gear portion 550 can be connected to the second output gear 420; or both the first gear portion 510 and the second gear portion 550 can be connected to the first output gear 410 and the second output gear 420.

[0286] On the other hand, although the above-described application of the clutch device to a refrigerator has been used as an example, there are no limitations on the products to which the clutch device can be applied, and it should be noted that the clutch device can be applied to various household appliances other than refrigerators. Furthermore, the clutch device can be applied to furniture other than household appliances.

[0287] Furthermore, although the clutch device has been described as an example for use in door opening / closing devices, it can be applied differently to devices that require power transmission and release.

[0288] Examples of this disclosure may be described in accordance with one or more of the following terms.

[0289] Clause 1. A refrigerator, said refrigerator comprising: A cabinet with storage space; Opening and closing the door of the storage space; and A door opening and closing device for opening and closing the door. The door opening and closing device includes: The driver generates power. A power transmission unit that transmits the power of the drive; and An operating unit, which receives the power from the driver and operates to open the door, includes a linkage connected to the door. The power transmission unit includes: An input gear assembly configured to receive power from the driver, and An output gear assembly, configured to connect to the input gear assembly to receive power from the input gear assembly during drive operation, and to disconnect from the input gear assembly when the drive stops, and The rotation center of the input gear assembly and the rotation center of the output gear assembly are spaced apart from each other.

[0290] Clause 2. The refrigerator as described in Clause 1, The input gear assembly includes: axis, A first input gear, the first input gear being connected to the shaft and the drive, and A second input gear, which is connected to the shaft, and When the first input gear rotates, the second input gear moves in the axial direction of the shaft.

[0291] Clause 3. The refrigerator as described in Clause 2, The rotation direction of the second input gear is opposite to the rotation direction of the output gear assembly.

[0292] Clause 4. The refrigerator described in Clause 2, When the driver is in a stopped state, the second input gear is in its initial position, and At the initial position of the second output gear, the second input gear is disconnected from the output gear assembly.

[0293] Clause 5. The refrigerator as described in Clause 4, Specifically, when the driver operates in the forward direction, the second input gear moves along the axis in one direction due to stationary inertia, and when the driver operates in the opposite direction, the second input gear moves along the axis in another direction opposite to the first direction.

[0294] Clause 6. The refrigerator as described in Clause 5, The shaft includes a screw or a worm gear to allow movement of the second input gear.

[0295] Clause 7. The refrigerator as described in Clause 6, The second input gear is directly connected to the shaft, and a screw or gear having a shape corresponding to the screw or the worm gear is formed on the second input gear.

[0296] Clause 8. The refrigerator as described in Clause 6, The second input gear is connected to the shaft via a connecting member, and A screw or gear having a shape corresponding to the screw or the worm gear is formed on the connecting member.

[0297] Clause 9. The refrigerator described in Clause 5, The input gear assembly further includes: A first elastic member, the first elastic member being configured to limit the movement of the second input gear when the drive stops during the reverse operation of the drive, while the second input gear moves in the one direction; and A second elastic member is used to restrict the movement of the second input gear when the drive stops during forward operation of the drive and the second input gear moves in the other direction.

[0298] Clause 10. The refrigerator as described in Clause 5, The output gear assembly includes: A first output gear, configured to engage with the second input gear when the second input gear moves in the one direction; and A second output gear, configured to engage with the second input gear when the second input gear moves in the other direction, and When the second input gear is in the initial position, the second input gear is disconnected from the first output gear and the second output gear.

[0299] Clause 11. The refrigerator as described in Clause 10, The output gear assembly includes a connecting portion that connects the first output gear and the second output gear, and The first output gear and the second output gear rotate together.

[0300] Clause 12. The refrigerator as described in Clause 10, The second input gear includes multiple gear teeth. A first inclined surface is formed on the portion of the gear teeth facing the first output gear, and A second inclined surface is formed on the portion of the gear teeth facing the second output gear.

[0301] Clause 13. The refrigerator as described in Clause 12, An inclined surface is formed on the portion of each gear tooth of the first output gear facing the first inclined surface, and An inclined surface is formed on the portion of each gear tooth of the second output gear facing the second inclined surface.

[0302] Clause 14. The refrigerator described in Clause 2, The second input gear includes: a first gear portion connected to the shaft; and a second gear portion connected to the first gear portion and configured to rotate relative to the first gear portion.

[0303] Clause 15. The refrigerator as described in Clause 1, The operating unit includes: A first operating unit operates by receiving power from the driver, and The second operating unit, which is operated by receiving power from the driver from the output gear assembly and includes the connecting rod, and Specifically, when the actuator operates to automatically open the door, The first operating unit begins operation, and After the first operation unit starts operating, the second operation unit starts operating.

[0304] Clause 16. A door opening and closing device for opening and closing a door, the door opening and closing device comprising: A driver that generates power; A power transmission unit that transmits the power of the driver; An operating unit that receives the power from the driver and operates to open the door; A first operating unit, which is operated by receiving power from the driver; and A second operating unit, configured to be operated by receiving power from the actuator, and having a linkage connected to the door, The power transmission unit includes an input gear assembly and an output gear assembly, wherein the output gear assembly receives power from the input gear assembly and transmits the power to the second operation unit. The input gear assembly includes: axis, A first input gear, the first input gear being connected to the shaft, and A second input gear, which is in its initial position when the driver is stopped, and configured to move to engage the output gear assembly when the driver is operating, and The input gear assembly is configured to transmit power to the output gear assembly in a direction intersecting the axial direction of the shaft.

[0305] Clause 17. The door opening and closing device as described in Clause 16, The second input gear moves in the axial direction of the shaft around which the first input gear rotates.

[0306] Clause 18. The door opening and closing device as described in Clause 17, The output gear assembly includes: A first output gear, configured to connect to the second input gear when the driver operates in the positive direction; and A second output gear is configured to connect to the second input gear when the driver operates in the opposite direction.

[0307] Clause 19. The door opening and closing device as described in Clause 18, The first output gear and the second output gear rotate in the opposite direction to the rotation direction of the second input gear, and the first output gear and the second output gear rotate together in the same direction.

[0308] Clause 20. The door opening and closing device as described in Clause 18, The input gear assembly further includes: A first elastic member, the first elastic member being configured to limit the movement of the second input gear when the drive stops during reverse operation of the drive, provided that the second input gear moves in one direction; and A second elastic member is used to limit the movement of the second input gear when the drive stops during forward operation of the drive and the second input gear moves in another direction.

Claims

1. A refrigerator, the refrigerator comprising: A cabinet with storage space; Open and close the door of the storage space; as well as A door opening and closing device for opening and closing the door. The door opening and closing device includes: The driver generates power. A power transmission unit that transmits the power of the drive; and An operating unit, which receives the power from the driver and operates to open the door, includes a linkage connected to the door. The power transmission unit includes: An input gear assembly configured to receive power from the driver, and An output gear assembly, configured to connect to the input gear assembly to receive power from the input gear assembly during drive operation, and to disconnect from the input gear assembly when the drive stops, and The rotation center of the input gear assembly and the rotation center of the output gear assembly are spaced apart from each other.

2. The refrigerator according to claim 1, in, The input gear assembly includes: axis, A first input gear, the first input gear being connected to the shaft and the drive, and A second input gear, which is connected to the shaft, and When the first input gear rotates, the second input gear moves in the axial direction of the shaft.

3. The refrigerator according to claim 2, in, The rotation direction of the second input gear is opposite to the rotation direction of the output gear assembly.

4. The refrigerator according to claim 2, in, When the driver is in a stopped state, the second input gear is in the initial position, and At the initial position of the second output gear, the second input gear is disconnected from the output gear assembly.

5. The refrigerator according to claim 4, in, When the driver operates in the forward direction, the second input gear moves along the axis in one direction due to stationary inertia, and when the driver operates in the opposite direction, the second input gear moves along the axis in another direction opposite to the first direction.

6. The refrigerator according to claim 5, in, The shaft includes a screw or worm gear to allow movement of the second input gear.

7. The refrigerator according to claim 6, in, The second input gear is directly connected to the shaft, and a screw or gear having a shape corresponding to the screw or the worm gear is formed on the second input gear.

8. The refrigerator according to claim 6, in, The second input gear is connected to the shaft via a connecting member, and A screw or gear having a shape corresponding to the screw or the worm gear is formed on the connecting member.

9. The refrigerator according to claim 5, in, The input gear assembly also includes: A first elastic member, the first elastic member being configured to limit the movement of the second input gear when the drive stops during the reverse operation of the drive, while the second input gear moves in the one direction; and A second elastic member is used to restrict the movement of the second input gear when the drive stops during forward operation of the drive and the second input gear moves in the other direction.

10. A door opening and closing device for opening and closing a door, the door opening and closing device comprising: A driver that generates power; A power transmission unit that transmits the power of the driver; An operating unit that receives the power from the driver and operates to open the door; A first operating unit operates by receiving power from the driver; as well as A second operating unit, configured to be operated by receiving power from the actuator, and having a linkage connected to the door, The power transmission unit includes an input gear assembly and an output gear assembly, wherein the output gear assembly receives power from the input gear assembly and transmits the power to the second operation unit. The input gear assembly includes: axis, A first input gear, the first input gear being connected to the shaft, and A second input gear, which is in its initial position when the driver is stopped, and configured to move to engage the output gear assembly when the driver is operating, and The input gear assembly is configured to transmit power to the output gear assembly in a direction intersecting the axial direction of the shaft.

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