A refrigerator includes: a cabinet having a storage space; a door including a door unit configured to open or close the storage space and a drawer unit to provide a receiving space; a driving device disposed at the door unit and including a driving motor to provide power; and an elevation device disposed at the drawer unit, connected with the driving device, and configured to move up or down, the elevation device includes: a lower frame; an upper frame positioned over the lower frame; a scissor assembly configured to connect the lower frame and the upper frame; and a screw rotatably supported on the lower frame, configured to be rotated by driving force transmitted from the driving device disposed at the door unit, and connected with the scissor assembly.

A refrigerator includes: a cabinet having a storage space; a door including a door unit configured to open or close the storage space and a drawer unit to provide a receiving space; a driving device disposed at the door unit and including a driving motor to provide power; and an elevation device disposed at the drawer unit, connected with the driving device, and configured to move up or down, the elevation device includes: a lower frame; an upper frame positioned over the lower frame; a scissor assembly configured to connect the lower frame and the upper frame; and a screw rotatably supported on the lower frame, configured to be rotated by driving force transmitted from the driving device disposed at the door unit, and connected with the scissor assembly.

A sliding device is capable of decreasing a moving distance of a middle rail while maintaining a maximum moving distance of a movable rail. The sliding device includes a fixed rail fixed to a body into which a storage body is inserted, the movable rail fixed to the storage body, the middle rail installed between the movable rail and the fixed rail and configured to move relatively with respect to the movable rail and the fixed rail, and a driving part configured to move the middle rail so as to move the movable rail by a distance twice a moving distance of the middle rail.

A sliding device is capable of decreasing a moving distance of a middle rail while maintaining a maximum moving distance of a movable rail. The sliding device includes a fixed rail fixed to a body into which a storage body is inserted, the movable rail fixed to the storage body, the middle rail installed between the movable rail and the fixed rail and configured to move relatively with respect to the movable rail and the fixed rail, and a driving part configured to move the middle rail so as to move the movable rail by a distance twice a moving distance of the middle rail.

A refrigerator includes: a cabinet having a storage space; a door including a door unit to open or close the storage space and a drawer unit to provide a receiving space; a driving device disposed at the door unit and configured to provide power; and an elevation device disposed at the drawer unit, connected with the driving device, and configured to move up or down, in which the driving device includes: a motor assembly including a driving motor, a screw rotated by power from the driving motor and extending in an up-down direction, and a movable unit to move up and down along the screw; and a pair of lever units connected to the movable unit at both sides of the motor assembly, and each of the pair of lever units includes: a first lever connected to the movable unit; and a second lever connected with the first lever and connected with the elevation device.

A refrigerator includes: a cabinet having a storage space; a door including a door unit to open or close the storage space and a drawer unit to provide a receiving space; a driving device disposed at the door unit and configured to provide power; and an elevation device disposed at the drawer unit, connected with the driving device, and configured to move up or down, in which the driving device includes: a motor assembly including a driving motor, a screw rotated by power from the driving motor and extending in an up-down direction, and a movable unit to move up and down along the screw; and a pair of lever units connected to the movable unit at both sides of the motor assembly, and each of the pair of lever units includes: a first lever connected to the movable unit; and a second lever connected with the first lever and connected with the elevation device.

A drawer assembly is described that includes one or more mini-drawer assemblies. A mini-drawer assembly comprises a sliding tab along a rear-to-front axis, a release mechanism coupled to the sliding tab, and a body having a body bottom coupled from the body bottom to the sliding tab. The body may slide over the sliding tab. The mini-drawer assembly may include a plurality of compartments in the body and a plurality of lids that are hingedly coupled to the compartments. Each lid may have a respective fastening element. A plurality of latches may couple to the body such that each latch is coupled to a corresponding compartment. The latch may hold the respective fastening element of the lid. When the body is pulled out along the rear-to-front axis, the release mechanism may engage with the latch to release the respective fastening element and to unlatch the lid of the compartment.

A drawer assembly is described that includes one or more mini-drawer assemblies. A mini-drawer assembly comprises a sliding tab along a rear-to-front axis, a release mechanism coupled to the sliding tab, and a body having a body bottom coupled from the body bottom to the sliding tab. The body may slide over the sliding tab. The mini-drawer assembly may include a plurality of compartments in the body and a plurality of lids that are hingedly coupled to the compartments. Each lid may have a respective fastening element. A plurality of latches may couple to the body such that each latch is coupled to a corresponding compartment. The latch may hold the respective fastening element of the lid. When the body is pulled out along the rear-to-front axis, the release mechanism may engage with the latch to release the respective fastening element and to unlatch the lid of the compartment.

This disclosure includes a description of various embodiments of waste-receiving systems. In some embodiments, a waste-receiving system comprises at least one waste receptacle configured to be positioned inside of a cabinet, an electric drive system configured to transition the waste-receiving system from a retracted or closed position within a closed cabinet to an extended or open position that provides access to the waste receptacle inside of the waste-receiving system, such as by moving the waste receptacle at least partially outside of the cabinet or opening a cabinet door or access region. The system can include a sensor system configured to generate one or more electronic signals from an environment, such as from a user, and a processor in electronic communication with the sensor system and a motor, the processor configured to actuate the motor based at least in part on the one or more electronic signals received from the sensor system. In some embodiments, the waste-receiving system may further comprise a cabinet. In some embodiments, the waste-receiving system may have at least one waste receptacle that is supported by a holder. In some embodiments, the waste-receiving system can have a drive system that is configured to move the at least one receptacle by moving the holder.

One embodiment of the present invention provides an actuator comprising: a housing having a mounting space part formed therein; a motor part provided inside the housing and generating power; a reduction gear part of which a plurality of gears respectively having an internal gear and an external gear sequentially engage with each other so as to transmit the power generated in the motor part; and a rod part engaging with the gear disposed at the last position, and linearly moving according to the rotation of the gear, wherein one of the plurality of gears is formed such that the internal gear and the external gear can rotate together or rotate independently.