Disclosed is a propeller, including a main driving device. Foldable blades and a fixed propeller are detachably connected to a projecting shaft of a driving motor. When the foldable blades are arranged, the propeller can be used as a hydrofoil board booster, and be clamped to a vertical rod of the hydrofoil board. When a fixed propeller is surrounded by a water flow culvert pipe provided with water inlet grooves, the propeller can be handheld with a handheld bracket or worn to advance and play underwater. Further, the propeller can be used as a guiding device for a diving apparatus. In combination with a gas cylinder and an airbag, the propeller can also be used as a scuba gear. Together with movable and fixed hydrofoil boards, the propeller can also be used as a gliding apparatus for diving.

Disclosed is a propeller, including a main driving device. Foldable blades and a fixed propeller are detachably connected to a projecting shaft of a driving motor. When the foldable blades are arranged, the propeller can be used as a hydrofoil board booster, and be clamped to a vertical rod of the hydrofoil board. When a fixed propeller is surrounded by a water flow culvert pipe provided with water inlet grooves, the propeller can be handheld with a handheld bracket or worn to advance and play underwater. Further, the propeller can be used as a guiding device for a diving apparatus. In combination with a gas cylinder and an airbag, the propeller can also be used as a scuba gear. Together with movable and fixed hydrofoil boards, the propeller can also be used as a gliding apparatus for diving.

A submersible propulsion device and diving suit. The propulsion device includes: at least one angle sensor assembly having a first sensing unit to be disposed on a thigh and a second sensing unit to be disposed on a calf on the same side of the diver, and being configured to sense an angle between a thigh and a calf on a corresponding side of the diver based on a relative positional relationship between the respective first sensing unit and second sensing unit; at least one propeller having a propeller body and battery module; and a controller connected to the angle sensor assembly and the propeller respectively, so as to control the propeller based on an angle signal sensed by the angle sensor assembly. The submersible propulsion device is flexible in configuration and convenient to control, and can free both hands.

A submersible propulsion device and diving suit. The propulsion device includes: at least one angle sensor assembly having a first sensing unit to be disposed on a thigh and a second sensing unit to be disposed on a calf on the same side of the diver, and being configured to sense an angle between a thigh and a calf on a corresponding side of the diver based on a relative positional relationship between the respective first sensing unit and second sensing unit; at least one propeller having a propeller body and battery module; and a controller connected to the angle sensor assembly and the propeller respectively, so as to control the propeller based on an angle signal sensed by the angle sensor assembly. The submersible propulsion device is flexible in configuration and convenient to control, and can free both hands.

An underwater propulsion device is disclosed comprising two sleeves for fitting around each of a user's lower legs, with each sleeve mounting a propulsion unit, and the sleeves being connectable by a bar between them during underwater operation of the device by the user.

An underwater propulsion device is disclosed comprising two sleeves for fitting around each of a user's lower legs, with each sleeve mounting a propulsion unit, and the sleeves being connectable by a bar between them during underwater operation of the device by the user.

Extended range, removeable batteries, and removeable electronic control modules for a motorized surfboard fin is disclosed. The motorized fin is attached to the bottom of a surfboard to assist a surf rider in paddling, propulsion, and catching a wave. The motorized fin device integrates a propeller, motor, battery, charging assembly, and related electronics, which are activated by the rider via a remote control. The fin is adapted to fit standardized fin securement systems by way of interchangeable connectors. The remote control has geolocation tracking and wireless charging capability. A software application for use with a smartphone is used to perform configuration and maintenance functions.