Abstract: A data transmission system is disclosed. The data transmission system includes at least one signal processing device, at least one conversion device, at least one antenna device, and at least one flexible printed circuit board. The at least one signal processing device is configured to generate or receive at least one data. The at least one conversion device is configured to transform between the at least one data and an optical signal. The at least one antenna device is configured to obtain the at least one data according to the optical signal, and configured to receive or transmit the at least one data wirelessly. The at least one flexible printed circuit board includes at least one conductive layer and at least one optical waveguide layer. The at least one optical waveguide layer is configured to transmit the optical signal.

Abstract: A supporting mechanism applied to a printer is disclosed in the present invention. The supporting mechanism includes a base, a holder slidably disposed on the base for holding a web, a door pivotably disposed on the casing, and a linkage set for moving the holder relative to the base. The linkage set includes a first rod connected between the holder and the door for moving the holder relative to the base when the door rotates, an arm rod pivoted to the casing, and a second rod pivoted to the door and the arm rod for driving the arm rod to press the holder, so as to move the holder relative to the base when the door rotates.

Abstract: A printer capable of printing two surfaces of a medium is disclosed in the present invention. The printer includes a base, a holder rotatably disposed on the base for holding webs, and a rotary mechanism for rotating the holder relative to the base. The rotary mechanism includes a wheel disposed on the holder, and a gear crank disposed on the base. A plurality of slots is formed on the wheel, and the gear crank includes an actuating pin. The actuating pin can slide into one of the slots when the gear crank rotates, so as to rotate the wheel, and the holder can rotate relative to the base.

Abstract: A supporting mechanism applied to a printer is disclosed in the present invention. The supporting mechanism includes a base, a holder slidably disposed on the base for holding a web, a door pivotably disposed on the casing, and a linkage set for moving the holder relative to the base. The linkage set includes a first rod connected between the holder and the door for moving the holder relative to the base when the door rotates, an arm rod pivoted to the casing, and a second rod pivoted to the door and the arm rod for driving the arm rod to press the holder, so as to move the holder relative to the base when the door rotates.

Abstract: A printer capable of printing two surfaces of a medium is disclosed in the present invention. The printer includes a base, a holder rotatably disposed on the base for holding webs, and a rotary mechanism for rotating the holder relative to the base. The rotary mechanism includes a wheel disposed on the holder, and a gear crank disposed on the base. A plurality of slots is formed on the wheel, and the gear crank includes an actuating pin. The actuating pin can slide into one of the slots when the gear crank rotates, so as to rotate the wheel, and the holder can rotate relative to the base.