Please select the most similar patent number from A, B, C and D. Which number is?
A safety rope structure (100) for a window cleaning robot and a window cleaning robot. The safety rope structure (100) for a window cleaning robot comprises a safety rope, a safety rope fixing mechanism (10) for fixing the safety rope, and a locking mechanism (20). The safety rope fixing mechanism (10) comprises a rope passing hole assembly (11) for the safety rope to pass through, a fixing frame (13), and a locking sheet (12) having one end provided in the interior of the rope passing hole assembly (11) for fixing the safety rope and having the other end engaged with the fixing frame (13); the locking mechanism (20) comprises a locking knob (21), a locking seat (22) fixedly connected to the locking knob (21), and a locking pin (23) passing through the locking seat (22) and plugged to the locking sheet (12). By means of the structural design of mutual engagement and plugging connection between the locking mechanism (20) and the safety rope fixing mechanism (10), the safety rope fixing mechanism (10) is locked on a window cleaning robot body (31), such that the window cleaning robot can safely perform cleaning working, and the risk of dropping or falling of the window cleaning robot is eliminated.
A: A valve clamping device (100) having a locking mechanism (80), and a valve repairing system. The valve clamping device (100) comprises a fixed base (20), at least one pair of clamp arms (40), a drive assembly (70) and a locking mechanism (80), the at least one pair of clamp arms (40) being connected to the fixed base (20) and being able to be open and closed relative to the fixed base (20); the drive assembly (70) comprises a drive shaft (72) movably inserted into the fixed base (20), the drive shaft (72) moves axially to drive the clamp arms (40) to be open and closed relative to the fixed base (20), and a positioning portion (720) is provided on the outer peripheral surface of the drive shaft (72); and the locking mechanism (80) comprises a locking member (82) and an abutting and pushing member (84), a locking hole (820) is provided axially in the locking member (82), the drive shaft (72) passes through the locking hole (820), and the abutting and pushing member (84) abuts against the locking member (82) and is provided obliquely in the fixed base (20), so that an edge (281) of the locking hole (820) is snap-fitted with the positioning portion (720). The locking mechanism (80) can increase a friction force and a mechanical engagement force between the drive shaft (72) and the locking member (82), and prevent the edge (281) of the locking hole of the locking member (82) from being locally stressed and wearing, improving the anti-fatigue performance of the valve clamping device (100), improving the locking stability, and preventing locking failure.
B: Disclosed are a quick disassembly device for a safety rope and a stage lamp using same. The quick disassembly device is used for mounting the safety rope (6) on or disassembling the safety rope from a mounting fixed structure (30) and comprises a fixed device and a mounting and disassembling structure used for connecting the safety rope (6). The mounting and disassembling structure is provided with a first through hole (11) and a second through hole (12) being in communication with each other and elastic, wherein the size of the first through hole (11) is smaller than the size of the second through hole (12), and the first through hole (11) or the second through hole (12) is provided with an opening (13) penetrating through the edge of the mounting and disassembling structure. The fixed device is provided on the mounting fixed structure (30) and can penetrate into the through hole. The mounting and disassembling structure is moved such that the fixed device is located in the first through hole (11) or the second through hole (12) to mount the safety rope (6) on or disassemble the safety rope from the mounting fixed structure. The mounting and disassembling structure is sheathed on the fixed device through the second through hole (12), and the mounting and disassembling structure is moved by means of elasticity of an elastic structure such that the fixed device penetrates through a position where the first through hole (11) and the second through hole (12) are communicated and enters the first through hole (11) or the second through hole (12) to achieve mounting and disassembling of the safety rope (6).
C: A fully automatic window cleaning robot, comprising a substrate (11); walking devices (2) are provided at two sides of the substrate (11) in a cleaning direction; and two cleaning modules (3) are symmetrically provided on one side of the substrate (11) facing a working surface; each of the cleaning modules (3) comprises a support plate (31), a back plate (32) being fixedly mounted on a side edge of the support plate (31), and one end of a link net (33) being fixedly connected to an inner side of the back plate (32). The link net (33) comprises a set of cylinders (331), the ends of each two adjacent cylinders (331) are rotatably connected to each other by means of a rotating plate (332), a cleaning cloth (51) is fixedly connected to the side of the link net (33) facing away from the support plate (31), and a pressure sensor (53) embedded and mounted on the cylinder (331) is provided on the side of each cylinder (331) connected to the cleaning cloth (51). The distance between the two cleaning modules (3) is adjusted by means of an adjustment device (6). The link net (33) on which the cleaning cloth (51) is mounted is pressed, by means of a pressing plate (72), to be attached to a right-angle surface formed by a window frame (100) and a glass (200), so that a corner can be cleaned thoroughly. The position of the pressing plate (72) is adjustable, so that cleaning can be performed on windows having different sizes, improving the cleaning efficiency.
D: A support unlocking structure (100), comprising a head holder adaptation mechanism (110) and a clamping mechanism (120); the head holder adaptation mechanism (110) comprises an adaptation assembly (112) connected to a head holder mechanism (510) and a mounting plate (111) on which the adaptation assembly (112) is mounted; the clamping mechanism (120) is arranged on a head holder fixing mechanism (200) and clamps the mounting plate (111), the clamping mechanism (120) has an unlocking state and a locking state; when a drag force applied to the head holder adaptation mechanism (110) exceeds a threshold of the clamping mechanism (120), the clamping mechanism (120) is in the unlocking state, and the mounting plate (111) can move relative to the clamping mechanism (120), and when the clamping mechanism (120) is in the locking state, the mounting plate (111) is fixed in the clamping mechanism (120). When an accident occurs, the clamping mechanism (120) automatically unlocks the mounting plate (111) under the effect of a drag force of the head holder mechanism (510), the position of the head holder mechanism (510) is no longer fixed, and the head holder mechanism can sink along with a surgical bed system (500), preventing a patient (600) from being harmed, and achieving the effect of safety protection. Further disclosed are a joint locking mechanism (140), a head holder fixing mechanism (200) and a surgery assisting robot system.
Answer: C