Please select the most similar patent number from A, B, C and D. Which number is?
An electric toothbrush capable of cleaning the teeth in all directions, comprising a handle, a connecting portion provided at a front end of the handle, a motor, an outer brush plate (3), an inner brush plate (4), bristles (5) that are provided on inner surfaces of the inner brush plate (3) and the outer brush plate (4), and an inner bottom casing (6); further comprised is an outer bottom casing (7) that is connected by the connecting portion; an outer rotating plate (8) that is movably disposed within the outer bottom casing (7) and that is connected to the motor; an outer crank (9) that is rotatably connected to the outer rotating plate (8) and the outer plate disk (4) and that is located within the outer bottom casing (7); an inner crank (10) and an inner rotating plate (11) that are disposed within the inner bottom casing (6); the inner crank (10) is rotatably connected to the inner brush plate (4) and the inner rotating plate (11) respectively; at least one guiding rod (13) that is located at a side of a connecting rod is disposed on the outer bottom casing (7), at least one longitudinal strip-shaped inner guiding hole (401) is provided within the inner brush plate (4), and at least one longitudinal strip-shaped outer guiding hole (301) is provided within the outer brush plate (3); the inner brush plate (4) and the outer brush plate (3) may slide relative to the guiding rod (13). Driven by the motor, the bristles (5) on the inner brush disk (4) and the outer brush disk (3) may achieve cleaning in all directions for the inner and outer walls of the teeth, the gaps between the teeth, and so on; the present invention is convenient to use and has high cleaning efficiency.
A: Disclosed is a floor cleaning device with a hair roller (12). A brushing disc (1) is installed at the bottom of the floor cleaning device. The brushing disc (1) is provided with at least one of brushing bristles (3), brushing pieces (4) or brushing strips (2). At least one brushing bristle (3), brushing piece (4) or brushing strip (2) is in a curvilinear and radial arrangement. The brushing bristles (3), the brushing pieces (4) or the brushing strips (2) can be arranged continuously or intermittently. When the brushing disc (1) rotates, the brushing bristles (3) approximately rotate in the form of concentric circles or centripetally. The brushing pieces (4) or the brushing strips (2) rotate centripetally. At the bottom of a suction channel (5) of the floor cleaning device, a suction port (6) is formed at the centre of the brushing disc (1) or near the centre of the brushing disc (1). The roll-shaped hair roller (12) is arranged transversally across a tube wall of the suction channel (5). At least one side of the hair roller (12) is provided with teeth meshed with teeth (13; 14) arranged at an upper or lower edge of an inner ring of the brushing disc (1) or at a lower or inclined lower edge of a driving shaft of the brushing disc (1). When the brushing disc (1) rotates, the hair roller (12) is driven to rotate, such that long hair that may possibly enter an impeller (7) through the suction channel (5) can be winded and retained on the hair roller (12).
B: An electric toothbrush for cleaning teeth, formed by connecting a toothbrush main body (1) and a toothbrush head (2). In the toothbrush main body (1), a battery (13) is connected to a switch (16), the switch (16) is connected to a motor (14), and the motor (14) is connected to a crank mechanism or a synchronizing mechanism; with power supplied by the battery (13) and the motor (14), and under the action of the crank mechanism and the synchronizing mechanism, the rotation of the motor (14) is converted to an action of drawing a circle by a connecting rod (7), thereby driving the toothbrush head (2) connected to the connecting rod (7) to carry out the action of drawing a circle as the connecting rod (7), so that a function of cleaning teeth is implemented.
C: A hand-pushed floor-washing machine capable of washing in multiple directions, comprising: a main body (1), a frame (2), a handle connecting rod (3), a handle (4), buttons (5), hub motors (6), a swinging head (8) and a vacuum motor (7); the main body (1) comprises a brush disc motor (11), a motor mounting plate (12), a rotating component, a holding head (111) component, a locking device (18) and a brush disc (19); the rotating component comprises a connecting sleeve (13), a mounting sleeve (16) and a bottom cover ring (17); and the holding head (111) component comprises a copper sleeve (14), a holding head support (15), a pin shaft (112), a rubber pad (110) and a holding head (111); the holding head (111) may rotate 180 degrees in two directions so that the holding head may enter low-down spaces such as under tables and under beds to perform cleaning, thus having a multi-directional washing function, thereby greatly improving the usage effect and enlarging the application range; meanwhile, flexible turning during walking is achieved with the aid of two hub motors (6), thereby saving time and labor, while operation is simple.
D: A brush disc (1) for a cleaning robot is provided. A plurality of curved disc spokes (2) are arranged on the brush disc (1) mounted downwardly at the bottom of the cleaning robot in a ring-shaped and radial manner. Each disc spoke (2) can be continuous or discontinuous. At least one of bristles (3), brush sheets (4) and brush strips (5) are arranged downwardly on the disc spokes (2). At least one of bristles (3), brush sheets (4) and brush strips (5) are arranged outwardly and slantwise on the outside of the brush disc (1). When the brush disc (1) is rotated, the bristles (3), the brush sheets (4) or the brush strips (5) rotate centripetally. A suction port (6) is arranged at the center of the brush disc (1) or in a position close to the center of the brush disc (1) and is ring-shaped or strap-shaped or circular. The bristles (3), the brush sheets (4) or the brush strips (5) are arranged at intervals and can push garbage or dirty water to the suction port (6) through rotation. The rotation speed of the brush disc (1) is set to not more than 300 revolutions.
Answer: B