Abstract: A tray assembly is provided. The tray assembly includes a first tray configured to be mounted to a robot; and a second tray provided above the first tray and configured to be rotatably coupled to the first tray. The second tray includes at least one first rolling member provided on a lower surface of the second tray, which faces the first tray, and an elastic member having at least one end which is fixedly connected to the lower surface. When the second tray is rotated relative to the first tray, the second tray is configured to be returned to its original position by virtue of a restoring force of the elastic member of the second tray.

Abstract: A support assembly is provided. The support assembly includes: a lower frame configured to be mountable on one surface of a moving object; a guide frame configured such that one end is coupled to an upper surface of the lower frame, and at least a part of another end is curved toward where the lower frame is located; a connection frame configured such that one side includes a plurality of rollers spaced apart at a predetermined interval, and the plurality of rollers slide along the curved part of the guide frame; and an upper frame coupled to another side of the connection frame and configured to move in response to the plurality of rollers sliding along the curved part of the guide frame.

Abstract: A tray assembly is provided. The tray assembly includes a first tray configured to be mounted to a robot; and a second tray provided above the first tray and configured to be rotatably coupled to the first tray. The second tray includes at least one first rolling member provided on a lower surface of the second tray, which faces the first tray, and an elastic member having at least one end which is fixedly connected to the lower surface. When the second tray is rotated relative to the first tray, the second tray is configured to be returned to its original position by virtue of a restoring force of the elastic member of the second tray.

Abstract: A tray includes a first tray configured to be fixedly mounted to a robot; a second tray provided above the first tray and configured to be rotatably coupled to the first tray; and at least one pad assembly positioned between the first tray and the second tray. Each of the at least one pad assembly includes at least one rolling member provided in a direction toward the first tray and an elastic member having at least one end fixedly connected to an interior of the at least one pad assembly. The at least one pad assembly is coupled to the second tray and is mounted to be rotatable relative to the first tray. When the second tray is rotated relative to the first tray, the second tray is configured to be returned to its original position by virtue of a restoring force of an elastic member of the pad assembly.

Abstract: The present disclosure provides a description of an automated notification system based upon location apparatus and networks like the Global Positioning System (GPS) or land-based radio signal triangulation. Notifications are broadcasted to various devices based upon the position of the moving broadcasting unit. Signals from the broadcasting unit could be sent at preprogrammed time to corresponding receivers. The broadcasting unit has an onboard computer that is preprogrammed with route information including scheduled stops and wirelessly sends information at preprogrammed time to multiple receivers. The onboard computer receives live update route information from the control center wireless communication module that can override the information previously entered into the computer with a removable media.