Please select the most similar patent number from A, B, C and D. Which number is?
A rotary snap-fit mechanism (9) for use inside an endoscope handle and an endoscope (100). The rotary snap-fit mechanism (9) comprises a snap-fit support (90); a snap-fit structure (96) is provided inside the snap-fit support (90); the snap-fit structure (96) comprises a snap-fit handle (97) and a snap-fit notch connecting handle (98) provided at a lower end portion of a handle housing (4). When in use, the snap-fit handle (97) is located at a position corresponding to the snap-fit notch connecting handle (98), and then is pressed hard to drive a snap-fit cone (92) on the snap-fit handle (97) to be placed inside a snap-fit notch accommodating cylinder (94) on a connecting handle rod (93), and then is rotated by an angle, so that the snap-fit can reach an installation position. After the use is completed, the snap-fit handle (97) is rotated in the opposite direction, and then is pulled out to achieve the purpose of disassembly. The contaminated endoscope part is discarded, and the uncontaminated endoscope part can be reused, avoiding the case in the prior art in which both the contaminated and uncontaminated endoscope parts are discarded, thereby reducing the usage cost, saving materials, and having the effect of being easily installed and disassembled.
A: The present application relates to the field of electronic devices. Disclosed are a handle and an electronic device. The handle comprises a body, a button component, and a resetting element. The body is provided with a cavity and an opening. The button component is rotatably mounted in the cavity and is movable in the axial direction of the opening; the button component partly protrudes from the opening. The resetting element is connected respectively to the button component and to the body. Either the inner wall of the cavity or the sidewall of the button component facing the inner wall is provided with multiple engaging grooves distributed in the direction of rotation of the button component, the other is provided with at least one engaging member, and the engaging member limitingly fits into the engaging grooves. When the engaging member is located at a first position, the resetting element is in a first state, the engaging grooves are separated from the engaging member, and the button component is rotatable relative to the body; when the engaging member is located at a second position, the resetting element is in a second state, the engaging grooves are engaged with the engaging member, and the button component is fixed relative to the body.
B: The present invention provides an endoscope handle, an endoscope, and an endoscope system. The endoscope system comprises an endoscope, an image processor, and a display, wherein the endoscope is in communication connection with the image processor by means of a cable; and the image processor is in communication connection with the display. The endoscope comprises a handle body, a wire outlet used for leading out an external cable is provided in the handle body, the handle body is provided with a holding area, and the wire outlet is provided in the side of the holding area facing a distal end of the handle body. The present invention has the advantages of alleviating the burden of a user when the user holds the endoscope handle, improving the holding stability, reducing the routing difficulty of an internal signal wire, and increasing the quality of image signal transmission.
C: Provided is a connecting structure for connecting a head assembly (2) and a handle portion (1) of a vibrating electric cleaning device, the cleaning device includes the handle portion (1) and the head assembly (2) detachably mounted on the handle portion (1), the handle portion (1) includes a handle housing (11) with a hollow portion at the rear end and a vibration shaft (3), the head assembly (2) includes a cleaning element (21) and a brush handle housing (22) with a handle interface (111) on the top of the front end, the handle interface (111) and the vibration shaft (3) are accommodated in the hollow portion, a blind hole (114) is provided in the middle of the handle interface (111), the rear end of the vibration shaft (3) is tightly inserted into the blind hole (114); a buckle cavity (113) is provided on the handle interface (111), the front end surface of the buckle cavity (113) is a buckle locking surface (112) of the handle interface (111); a buckle combination part including a buckle cantilever (24) and a buckle protrusion (29) is provided in the brush handle housing (22) along its rear end, the buckle cantilever (24) is formed in the brush handle housing (22) and is separated from the brush handle housing (22), the rear end of the buckle cantilever (24) is provided with the buckle protrusion (29), a locking surface (23) of the buckle combination part is provided on the buckle protrusion (29), the buckle protrusion (29) is accommodated by the buckle cavity (113) of the handle interface (111).
D: A buckle self-locking metal jump rope, comprising a jump rope (10) and handles (20) connected to two ends of the jump rope (10), wherein locking devices (30) are provided between the jump rope (10) and each handle (20), a rotating device (40) is provided between each locking device (30) and each handle (20), each locking device (30) comprises an inner member (31), the inner members (31) are U-shaped groove structures the top parts of which are open, two sides of each inner member (31) is provided with buckles (32), and the inner members (31) are in hinged connection with the middle part of the buckles (32); the inner side of each buckle (32) is provided with a guide rod (324) close to the bottom end, and a spring (325) is sleeved on each guide rod (324); two ends of the springs (325) abut against the buckles (32) and the inner members (31), respectively; and the top part of each buckle (32) extends to form a bending part (323) close to the inner side, the tail ends of the jump rope (10) are provided with connecting heads (33), and two sides of each connecting head (33) are provided with protrusions (331) that clamp and lock with the bending parts (323).
Answer: B