Please select the most similar patent number from A, B, C and D. Which number is?
An amphibious bicycle outer assembly frame, comprising a front foldable frame, a rear foldable frame, a front buoy, a rear buoy, a control group and a propeller; the front buoy is mounted on the front foldable frame, and the rear buoy is provided on the rear foldable frame; the propeller is mounted on the rear buoy; the control group comprises a battery pack (1), a front control cable (2), a rear control cable (3), a front frame motor (4), a rear frame motor (5), a propeller motor (6) and three control buttons (7); the front control cable (2) and the rear control cable (3) are respectively connected to the front foldable frame and the rear foldable frame; the front frame motor (4), the rear frame motor (5) and the propeller motor (6) are respectively in transmission connection with the front control cable (2), the rear control cable (3) and the propeller; the three control buttons (7) respectively controls the operation of the three motors; and the battery pack (1) supplies power to the three motors. The amphibious bicycle outer assembly frame can control the folding and unfolding of the assembly frame by means of the motors and is very conveniently, and the outer assembly frame can reduce the occupied space by folding and stowing. The amphibious bicycle outer assembly frame can realize the function of riding on water by unfolding the frame when launching, and can restore the function of a bicycle of riding on land by folding the frame to an appropriate position.
A: Disclosed is a submersible propeller. The submersible propeller comprises a battery and a propeller body. The propeller body comprises a left propeller body (2) and a right propeller body (10), the front portions of the left propeller body (2) and the right propeller body (10) are connected to a waistband-type power supply battery (12) respectively by means of a left propeller body power supply cable (1) and a right propeller body power supply cable (11); and the rear portions of the left propeller body (2) and the right propeller body (10) are respectively connected to a left angle controller (5) and a right angle controller (7) by means of a left angle controller connecting cable (4) and a right angle controller connecting cable (8); and the left propeller body (2) and the left angle controller body (5), and the right propeller body (10) and the right angle controller (7) are distributed in a left-right symmetry manner. By means of the angle controllers on legs, the modes of advancing, variable-speed advancing, reversing, turning, in-situ steering, etc. can be carried out, and the whole operation process only depends on control by a diver by adjusting the included angle between thighs and calves, and does not need to be controlled by hands at all.
B: A tail-extended inflatable boat, comprising: a boat body (1) provided with a left air chamber (7) and a right air chamber (8) on two sides thereof; a rudder (2) fixed between a fore cabin (6) of the boat and a foot pedal propeller arranged on a propeller supporting plate (5); foot pedals (3) arranged above a water surface and on an upper end of the boat body (1), and connected to the foot pedal propeller; a seat (4) arranged on the boat body (1). The propeller supporting plate (5) is fixed above the left air chamber (7) and the right air chamber (8) of the boat body (1), and the fore cabin (6) of the boat is arranged on an inner side of a front end of the boat body (1). The air chambers arranged on the two sides of the boat are extended on the basis of an existing inflatable boat, and the buoyancy of the extended air chambers (7, 8) is greater than the total weight of an adult, the foot pedal propeller and the propeller supporting plate (5). The foot pedal propeller is mounted on the propeller supporting plate (5), and a person rides on the foot pedal propeller with two feet alternately pedaling the foot pedals (3), enabling the inflatable boat to move back and forth easily. The rudder (2) is mounted between the foot pedal propeller and the fore cabin (6) of the boat, such that the direction of the boat can be conveniently and effectively controlled.
C: A routing structure of a folding bicycle comprises a control line (1), a front frame provided with a front folding connector (21), and a back frame provided with a back folding connector (31). The front frame and the back frame are hinged to be folded together through the front folding connector (21) and the back folding connector (31), a first through hole (211) is formed in the front folding connector (21), a second through hole (311) is formed in the back folding connector (31), and a protective sleeve (5) is fixedly arranged in the first through hole (211) and the second through hole (311) in a penetrated mode. The control line (1) is arranged in the first through hole (211), the second through hole (311) and the protective sleeve (5) in a penetrated mode. The control line (1) is fixedly provided with a clamping stopping part (6), and the clamping stopping part (6) and one end, arranged in the first through hole (211) in the penetrated mode, of the protective sleeve (5) are arranged in a corresponding limiting mode. When the front folding connector (21) and the back folding connector (31) are unfolded and folded, the two ends of the protective sleeve (5) are arranged in the first through hole (211) and the second through hole (311) respectively. The control line is protected by the protective sleeve, so that the control line is prevented from being abraded, the parts, located at the position of the folding connectors, of the control line are prevented from being arched outside the folding connectors, and the folding smoothness is improved.
D: An amphibious canoe comprises a canoe body (1). A sliding rail (2) is provided within the canoe body (1), a footrest (3) is fixedly provided on the sliding rail (2) and a seat (4) is slidably provided on the sliding rail (2) behind the footrest (3). A frame (5) is also provided on the canoe body (1), rockers (6) are hingedly provided on the left and right sides of the frame (5), detachable or reversible wheel assemblies (7) are respectively provided on the front side and the rear side of the frame (5), and the rockers (6) are drivingly connected to the front wheel assembly or the rear wheel assembly through a cable (8). Said canoe can be used on land and in water.
Answer: D