Abstract: An unmanned aerial vehicle includes a central body, a plurality of arms extendable from the central body, and one or more joints. Each of the plurality of arms is configured to support one or more propulsion units, and is configured to transform between (1) a flight configuration in which the arm is extending away from the central body and (2) a compact configuration in which the arm is folded against the central body. Each joint is configured to couple one arm to the central body. At least one of the one or more joints includes an elastic element configured to cause at least one of the plurality of arms to automatically retract when the at least one of the plurality of arms is reversibly folded to a first predetermined state, and automatically extend when the at least one of the plurality of arms is reversibly extended to a second predetermined state.

Abstract: An unmanned aerial vehicle includes a central body and a plurality of arms extendable from the central body. Each of the plurality of arms is configured to support one or more propulsion units. Each of the plurality of arms is configured to transform between (1) a flight configuration in which the arm is extending away from the central body and (2) a compact configuration in which the arm is folded against the central body. At least one of the plurality of arms is configured to rotate about a first rotational axis and at least a portion of the at least one of the plurality of arms is configured to rotate about a second rotational axis not parallel to the first rotational axis.

Abstract: A remote controller for operating an unmanned aerial vehicle (UAV) includes a user input component configured to receive user input from a user and a communication circuit configured to transmit an instruction to operate at least one of the UAV or a load carried by the UAV based on the user input. The remote controller is configured to transform between (1) a single-hand operation mode that enables the user to control an operation of the at least one of the UAV or the load using the user input from a single hand while being held by the single hand, and (2) a multi-hand operation mode that enables the user to control the operation of the at least one of the UAV or the load using at least two hands while holding the remote controller using the at least two hands.

Abstract: A remote control, including: a body with a front, a top, and a side; a touch screen disposed on the front; and an operating lever disposed on the front. The front includes an upper edge and a side edge intersecting with the upper edge. The upper edge intersects with the top, and the side edge intersects with the side. The operating lever is located near the upper edge and the side edge.

Abstract: A remote-control includes a remote-control body, a first antenna, and a second antenna. The remote-control body includes a control device for a user to input a remote-control command. The first antenna and the second antenna are provided at a top side of the remote-control body and rotatably connected to the remote-control body to be extended in a use state or folded in a contracted state. The first antenna and the second antenna rotate to a position pointing to the user in the use state, and the first antenna and the second antenna are configured to be stacked and arranged parallel to each other in the contracted state.

Abstract: A remote controller includes a remote controller body including a control device configured to receive a remote-control command. The remote controller further includes an antenna and a holding mechanism movably connected to two opposite sides of the remote controller body, respectively. The holding mechanism is configured to hold a mobile terminal. The remote controller further includes a connecting mechanism connected between the remote controller body and the holding mechanism and configured to enable the holding mechanism to move relative to the remote controller body to be in an extended state or in a contracted state.

Abstract: A remote controller includes a remote controller main body, a remote-control lever assembly, and a clamp assembly. The remote controller main body is formed with storage slots corresponding to the remote-control lever assembly. The remote-control lever assembly is detachably connected to the remote controller main body. When detached from the remote controller main body, the remote-control lever assembly is configured to be stored in the storage slots. The clamp assembly is movably connected to the remote controller main body and is capable of unfolding or folding from the remote controller main body. When being folded, the clamp assembly is configured to cover the remote-control lever assembly stored in the storage slots.

Abstract: A mobile device control method includes receiving a photographing command, turning off, in response to the photographing command, a light source affecting a photographing effect, and performing a photographing operation according to the photographing command.

Abstract: An unmanned aerial vehicle includes a central body and a plurality of arms extendable from the central body. Each of the plurality of arms is configured to support one or more propulsion units. Each of the plurality of arms is configured to transform between (1) a flight configuration in which the arm is extending away from the central body and (2) a compact configuration in which the arm is folded against the central body. At least one of the plurality of arms is configured to rotate about a first rotational axis and at least a portion of the at least one of the plurality of arms is configured to rotate about a second rotational axis not parallel to the first rotational axis.

Abstract: The present disclosure provides an Unmanned Ariel Vehicle (UAV). The UAV includes a fuselage including a housing, a core control board disposed in the housing, and a battery, the housing including a battery compartment, and the battery being disposed in the battery compartment; an arm disposed on the fuselage; and a power assembly disposed on the arm. The core control board is disposed above the battery, a payload receiving cavity is disposed at a front lower end of the housing, a rear-bottom view component is disposed at a rear end of the housing and electrically connected to the core control board, and the battery compartment is disposed at a middle position under the housing.

Abstract: A remote controller includes a remote controller body including a control device configured to receive a remote-control command. The remote controller further includes an antenna and a holding mechanism movably connected to two opposite sides of the remote controller body, respectively. The holding mechanism is configured to hold a mobile terminal. The remote controller further includes a connecting mechanism connected between the remote controller body and the holding mechanism and configured to enable the holding mechanism to move relative to the remote controller body to be in an extended state or in a contracted state.

Abstract: Devices and systems for assisting with playing a plucked string instrument are provided. In some exemplary implementations, a device for providing assistance to operating a plucked string instrument may include a key positioned above a string of the plucked string instrument and attachable to a fretboard of the plucked string instrument. The key may be configured to apply a force to the string when the key is depressed. The device may also include a magnet located under the key and configured to generate a magnetic field that reduces an amount of force required to depress the key without the magnet. The device may be implemented in a fretboard cover or may be integrated into the plucked string instrument.

Abstract: A remote control, including: a body with a front, a top, and a side; a touch screen disposed on the front; and an operating lever disposed on the front. The front includes an upper edge and a side edge intersecting with the upper edge. The upper edge intersects with the top, and the side edge intersects with the side. The operating lever is located near the upper edge and the side edge.

Abstract: An unmanned aerial vehicle (UAV) includes a central body and a plurality of arms extending from the central body. Each of the plurality of arms supports one or more propulsion units. At least one arm of the plurality of arms is configured to transform between (1) a flight configuration that provides lift while the UAV is in flight and (2) a landing configuration in which the at least one arm is configured to function as a landing support that bears weight of the UAV while the UAV is not in flight. The at least one arm is configured to transform between the flight configuration and the landing configuration in response to operation of the one or more propulsion units supported by the at least one arm.

Abstract: An unmanned aerial vehicle (UAV) includes a central body, a first arm and a second arm each attached to the central body and extending away from the central body, a first propulsion unit supported at a distal end of the first arm and a second propulsion unit supported at a distal end of the second arm, and one or more actuators configured to adjust an orientation of the first propulsion unit and an orientation of the second propulsion unit relative to the central body during flight of the UAV. The first arm and the second arm are configured to be reversibly folded against the central body. Each of the first propulsion unit and the second propulsion unit includes rotor blades configured to rotate to generate lift for the UAV, and a motor configured to drive the rotor blades.