Abstract: Various embodiments provide a timing belt tensioner for a 3D printer and the 3D printer. In those embodiments, the timing belt tensioner includes: a mounting frame, an idler and an elastic member, where the idler is connected to the mounting frame, and a timing belt of the 3D printer is wound around the idler, and is configured to drive a movement mechanism of the 3D printer to move on an XY plane; and the elastic member is configured to connect the mounting frame and a base of the 3D printer such that the mounting frame drives the idler to slide to a balance position relative to the base under an elastic force of the elastic member. When at the balance position, a balance is reached between the elastic force of the elastic member and a tensile force of the timing belt acting on the idler.

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: An unmanned aerial vehicle (UAV) includes a body and a gimbal camera. The body includes a housing including an inwardly recessed mounting groove with a notch on one side of the mounting groove, and a protective cover arranged at the housing and configured to open and cover the notch. The gimbal camera includes a mounting frame detachably connected to the housing via the mounting groove; a gimbal arranged at the mounting frame; and a camera arranged at the gimbal. In response to the gimbal camera and the housing being connected via the mounting frame, the gimbal camera is at least partially accommodated in the notch.

Abstract: An unmanned aerial vehicle (UAV) includes a fuselage including an upper portion and a lower portion, a navigation antenna arranged at head portion and/or a tail portion of the upper portion of the fuselage, a battery compartment arranged at the upper portion of the fuselage and configured to accommodate a battery, and a circuit board arranged in the lower portion of the fuselage below both the navigation antenna and the battery compartment. The circuit board is parallel to a bottom of the battery compartment.

Abstract: A movable device includes a fuselage and a navigation antenna arranged at an edge portion of the fuselage. The navigation antenna is tilted relative to the fuselage. One side of the navigation antenna proximal to a center portion of the fuselage is at a higher level than another side of the navigation antenna distal from the center portion of the fuselage.

Abstract: A frame assembly for an unmanned aerial vehicle includes an upper cover, a lower cover, a housing, and a circuit board. The housing includes electric chamber between the upper cover and the lower cover. The circuit board assembly is disposed in the electric chamber and includes a first circuit board arranged close to the upper cover and a second circuit board close to the lower cover. The first circuit board is spaced apart from the second circuit board.

Abstract: An unmanned aerial vehicle (UAV) includes a body and a gimbal camera. The body includes a housing including an inwardly recessed mounting groove with a notch on one side of the mounting groove, and a protective cover arranged at the housing and configured to open and cover the notch. The gimbal camera includes a mounting frame detachably connected to the housing via the mounting groove; a gimbal arranged at the mounting frame; and a camera arranged at the gimbal. In response to the gimbal camera and the housing being connected via the mounting frame, the gimbal camera is at least partially accommodated in the notch.

Abstract: An unmanned aerial vehicle (UAV) includes a vehicle body and a plurality of functional structures. The vehicle body includes a plurality of support structures. The plurality of functional structures are arranged at the vehicle body independently of each other. The plurality of functional structures include a plurality of groups of functional structures corresponding to and arranged at the plurality of support structures.

Abstract: The present disclosure provides a frame assembly for an unmanned aerial vehicle. The frame assembly comprises a housing having an electric chamber and a circuit board assembly disposed in the electric chamber and including a first circuit board and a second circuit board. The electric chamber has an upper opening and a lower opening; and the first circuit board is installed in the electric chamber via the upper opening, and the second circuit board is installed in the electric chamber via the lower opening and spaced apart from the first circuit board.

Abstract: A foldable and retractable mechanism includes a first body and a second body. The first body includes a first connection member. The second body is configured to rotate relative to the first body and including a second connection member. The first connection member and the second connection member are assembled in movable manner. The first connection member and the second connection member are configured to be in a retracted state, in which the first connection member and the second connection member at least partially overlap with each other and constraint relative rotation of the first body and the second body. The first connection member and the second connection member are configured to be in an extended state, in which the first connection member is away from the second connection member, and the second body is rotatable and capable of being folded over the first body.

Abstract: A sensor assembly for an unmanned aerial vehicle (UAV) includes a binocular sensor. The binocular sensor includes two vision sensors. The two vision sensors are located at a same vertical plane. The two vision sensors are arranged one above another at an interval.

Abstract: A battery assembly includes a battery body, a housing, a switch assembly, an output terminal, and a snap clip assembly. The housing includes an accommodation chamber. The battery body is mounted in the accommodation chamber. The switch assembly is fixed at the housing and configured to generate an in-position signal. The output terminal is arranged at the housing and configured to output power of the battery body and the in-position signal. The snap clip assembly is arranged at the housing and configured to cause the switch assembly to be in a first status when no external force is applied to the snap clip assembly, the in-position signal being at a first level in the first status, and when an external force is applied to the snap clip assembly, cause the switch assembly to be in a second status, the in-position signal being at a second level in the second status.

Abstract: An indication device of a battery includes a compression member and a plurality of light sources. The plurality of light sources are arranged in a ring shape to surround the compression member and configured to indicate power of the battery.

Abstract: A frame includes a top wall, a bottom wall opposite to the top wall, a receiving space between the top wall and the bottom wall, and a hold member arranged at one of the top wall and the bottom wall. The receiving space is configured to accommodate at least a portion of an arm connected to the frame. The hold member is configured to abut against the arm to generate a holding force to hold the arm between the top wall and the bottom wall when the arm is in an unfolded position.

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 aerial vehicle. The unmanned aerial vehicle includes a fuselage, a plurality of rotor propulsion assemblies installed on the fuselage, and a fixed-wing propulsion assembly that is detachably installed on the fuselage. The fixed-wing propulsion assembly is able to rotate relative to the fuselage when the fixed-wing propulsion assembly is installed on the fuselage.

Abstract: An unmanned aerial vehicle includes a central body, a plurality of arms extendable from the central body, and a plurality of landing stands. Each of the plurality of arms is configured to transform between a flight configuration where the arm is extending away from the central body and a compact configuration where the arm is folded against the central body. Each of the plurality of landing stands is attached to a distal end of one of the plurality of arms. A first one of the plurality of landing stands is longer than a second one of the plurality of landing stands.

Abstract: A movable device includes a fuselage and a navigation antenna arranged at an edge portion of the fuselage. The navigation antenna is tilted relative to the fuselage. One side of the navigation antenna proximal to a center portion of the fuselage is at a higher level than another side of the navigation antenna distal from the center portion of the fuselage.

Abstract: The present disclosure provides a frame assembly for an unmanned aerial vehicle. The frame assembly comprises a housing having an electric chamber and a circuit board assembly disposed in the electric chamber and including a first circuit board and a second circuit board. The electric chamber has an upper opening and a lower opening; and the first circuit board is installed in the electric chamber via the upper opening, and the second circuit board is installed in the electric chamber via the lower opening and spaced apart from the first circuit board.