Please select the most similar patent number from A, B, C and D. Which number is?
A high-security clutch electronic lock cylinder comprises a lock cylinder body (11), a lock cylinder core (2), a slide block (7), a transmission apparatus, an electric driver, an unlocking piece (8), and an unlocking piece housing (9). The slide block (7) is connected to a power output end of the electric driver by means of the transmission apparatus. The center of the end of the slide block (7) away from the electric driver is provided with an end head (7b). The end of the unlocking piece (8) near the slide block (7) is provided with a slot (8a); the end of the unlocking piece (8) away from the slide block (7) is provided with a compression spring (10). The end of the compression spring (10) away from the unlocking piece (8) is in contact with the inner wall of the unlocking piece housing (9). The slide block (7), the unlocking piece (8) and the compression spring (10) form a clutch structure for the electric lock cylinder.
A: A magnetic core material receiving and boxing apparatus, comprising a storage box (1), a support structure (2) being arranged on both the right side and the left side of the inner cavity of the storage box (1), a placement plate (3) being arranged above the support structures (2), a placement box (4) being fixedly connected to the bottom of the placement plate (3), a clamping structure (5) being arranged on the top of the placement plate (3), a sealing structure (6) being arranged on the front surface of the storage box (1), a connecting plate (7) being fixedly connected to the top of the inner cavity of the storage box (1), a sliding groove (8) being disposed on two sides of the bottom of the connecting plate (7), a sliding block (9) being slidably connected in the sliding groove (8), a tensile spring (10) being arranged in the sliding groove (8), the two ends of the tensile spring (10) respectively being welded to the inner wall of the sliding groove (8) and the surface of the sliding block (9), a moving rod (11) being movably connected to the bottom of the sliding block (9) by means of a moving shaft, and a pressing plate (12) being fixedly connected to the end of the moving rod (11) furthest from the sliding block (9) by means of the moving shaft.
B: A linear actuator, comprising a drive circuit board (1) and a bracket (8) mounted thereupon, said bracket comprising a motor (7) seat and a slide block (4) seat; two end faces of the slide block seat are provided with threaded holes, with two ends of a lead screw (7) passing through said threaded holes; a slide block (4) is provided on the lead screw and meshedly engaged therewith, said slide block being positioned between the two end faces of the slide block seat; a brush (3) is provided on the side of the slide block (4) away from the motor base, said brush (3) being provided with a connection face and a brush face; a potentiometer (2) is fixedly connected by a bolt (6) to the side face of the slide block seat of the bracket (8) away from the motor seat, two strips of carbon film (21, 22) are longitudinally arranged in parallel on the face of the side of the potentiometer (2) near the slide block (4), with the brush face of the brush (3) being in contact with the two carbon films (21, 22); the output shaft of a motor (7) is provided with a driving gear (13), the end of the lead screw (10) near the driving gear (13) is provided with a driven gear (9); the driving gear (13) and the driven gear (9) are meshedly engaged with each other.
C: A portable haptic feedback capacitive stylus for interaction on a mobile terminal comprises a tip (1), a sleeve ring (2), a first housing (3), a connecting cylinder (8), a second housing (5), an end-portion housing (16), a motor (4), a spring (9), a slider (10), a screw rod (11), a photoelectric code disc (12), a measurement and control module, a vibration touch module (7), and a power supply (15). The first housing (3) comprises a front housing and a rear housing, and a limit groove (302) is disposed in an inner wall of the first housing (3). The tip (1) is fixedly connected to one end of the connecting cylinder (8), and the one end of the connecting cylinder (8) passes through an end-portion through hole of the front housing. A clearance fit is provided between the sleeve ring (2) and the connecting cylinder (8). One end of the screw rod (11) is connected in the connecting cylinder (8), and the one end of the screw rod (11) is connected to the motor (4). The slider (10) is sleeved over the screw rod (11), and the slider (10) and the screw rod (11) fit each other. One end of the spring (9) is connected to the slider (10), and the one end of the spring (9) is connected to the sleeve ring (2). The photoelectric code disc (12) is connected to the motor (4), and the measurement and control module is separately connected to the photoelectric code disc (12) and the motor (4). The haptic feedback capacitive stylus solves a problem that haptic interaction on a mobile terminal is difficult to implement, and can generate continuous haptic feedbacks.
D: An unexpected unlocking proof electronic lock, comprising a lock cylinder core (10), a control circuit (7) and a clutch sleeve (20), the control circuit (7) being provided in the lock cylinder core (10), and a key hole being formed in the lock cylinder core (10); the electronic lock further comprises a transmission system, a power shaft (14), a clutch cam (19), a key clamping cam (13), a key clamping pin (12) and a suspension frame, and the lock cylinder core (10) is further provided with a clamping jaw (3), a torsion spring (18) and a clamping jaw motor (17); one end of the clamping jaw (3) is connected to an output shaft of the clamping jaw motor (17), one end of the torsion spring (18) is fixed to the suspension frame, and the other end of the torsion spring is connected to the clamping jaw (3); and the key clamping cam (30) is provided with a limiting groove, and the lock cylinder core (10) is provided with a limiting pin (8). Said electronic lock has low power consumption, a small size and strong violence resistant performance.
Answer: D