Abstract: A power module is configured to provide power to an electronic device. The module includes a rechargeable battery, an electrical generator, and a driving member. The electrical generator includes a rotor. The driving member is used to drive the rotor to rotate, and includes a mainspring, a receiver to receive the mainspring, and a shaft including one end connected to the mainspring and an opposite end connected to the rotor, enabling the rotor to rotate in union with the shaft. A cable includes one end attached to the shaft with a portion of the cable wound around the shaft. When an opposite end of the cable is pulled, the shaft rotates in a first direction, compressing the mainspring, when the mainspring rebounds, the shaft rotates back in a second direction, and the unwound part of the cable is wound back onto the shaft.

Abstract: The electronic device includes a body, a strap, and a strap connecting member. The strap connecting member further includes a pin, a torsion spring one end of which is connected to the pin, a receiving chamber accommodating the pin and defining an opening notch passing through the sidewall thereof, and a cover connected with the torsion spring and engaging with the receiving chamber. The strap is double-layered. The double-layered strap forms a folded end and an open end, the folded end is connected with the pin and is wrapped around the pin, and the open end is separated into two portions which pass at the opening notch and are respectively connected to the body. When the torsion spring is elastically deformed and generates a torsion force, the pin is rotated and the strap automatically shrinks in the receiving chamber under the torsion force.

Abstract: The electronic device includes a body, a strap, and a strap connecting member. The strap connecting member further includes a pin, a torsion spring one end of which is connected to the pin, a receiving chamber accommodating the pin and defining an opening notch passing through the sidewall thereof, and a cover connected with the torsion spring and engaging with the receiving chamber. The strap is double-layered. The double-layered strap forms a folded end and an open end, the folded end is connected with the pin and is wrapped around the pin, and the open end is separated into two portions which pass at the opening notch and are respectively connected to the body. When the torsion spring is elastically deformed and generates a torsion force, the pin is rotated and the strap automatically shrinks in the receiving chamber under the torsion force.

Abstract: A power module is configured to provide power to an electronic device. The module includes a rechargeable battery, an electrical generator, and a driving member. The electrical generator includes a rotor. The driving member is used to drive the rotor to rotate, and includes a mainspring, a receiver to receive the mainspring, and a shaft including one end connected to the mainspring and an opposite end connected to the rotor, enabling the rotor to rotate in union with the shaft. A cable includes one end attached to the shaft with a portion of the cable wound around the shaft. When an opposite end of the cable is pulled, the shaft rotates in a first direction, compressing the mainspring, when the mainspring rebounds, the shaft rotates back in a second direction, and the unwound part of the cable is wound back onto the shaft.