Please select the most similar patent number from A, B, C and D. Which number is?
A deformable walking stick, comprising a hand-held part, a seat part and a support part which are rotatably connected in sequence, and further comprising a locking device for locking a rotation angle between the hand-held part and the seat part, and a rotation angle between the seat part and the support part. When in use, the hand-held part and the support part can be rotated and folded around the seat part by a certain angle to be deformed into a stool for rest, rollers (34) being provided at the bottom of the deformed stool, so as to facilitate pushing or sliding. A motor for driving the rollers (34) can also be mounted to deform the walking stick into an electric scooter.
A: An anti-shake structure for a laser marking vibration lens comprises a vibration lens (1), a vibration lens motor (2), and a supporting plate (3) used for fixing the vibration lens motor (2). An output shaft (21) of the vibration lens motor (2) is connected to one end of the vibration lens (1), and is used for driving the vibration lens (1) to rotate. The anti-shake structure also comprises a fixing frame (4) and a clamping portion (5) that is used for clamping the other end (1a) of the vibration lens. The clamping portion (5) and the vibration lens (1) synchronously rotate. A rotation supporting portion (8) is disposed on the fixing frame (4). The clamping portion (5) is in rotation connection to the rotation supporting portion (8). A vibration lens cavity comprising the anti-shake structure. The problem of vibration lens jitters in a conventional laser marking process is solved, and the accuracy and operation safety of laser marking are improved; and proper connection and arrangement of the rotation supporting portion, the clamping portion and the fixing frame improve the overall balance and stability of a marking device.
B: Provided is a hand-held apparatus (1). The hand-held apparatus comprises: a telescopic rod (200), a fixing frame (110), a hand-held part (400) and a foot support (600), wherein the fixing frame (110) is mounted at the top end of the telescopic rod (200) for supporting a movable electronic device; the hand-held part (400) is sleeved on the telescopic rod (200) at a position close to the bottom end thereof, and the bottom end of the telescopic rod can move, relative to the hand-held part, between a first position and a second position; the foot support (600) is mounted at the bottom end of the hand-held part in a foldable manner; and when the bottom end of the telescopic rod is at the first position, the foot support can be in a folded state to accommodate the bottom end of the telescopic rod in the foot support. The above hand-held apparatus can adjust the distance between the fixing frame and the hand-held part by adjusting the position of the bottom of the telescopic rod, thereby achieving an additional length adjustment. Further provided is a hand-held apparatus, comprising: a rod member (83) and a fixing frame (81), wherein the fixing frame is rotatably mounted at the top end of the rod member; the fixing frame comprises a first snap-fit part and a second snap-fit part, wherein the first snap-fit part and the second snap-fit part are snap-fitted together to form an opening (812) for accommodating at least part of a first movable electronic device, and the opening is in the shape of a closed ring; and at least one of the first snap-fit part and the second snap-fit part is provided with a structure for locking the first movable electronic device. The above hand-held apparatus can improve the usage safety of the first movable electronic device. Further provided is a photographing device based on either of the above hand-held apparatuses.
C: Disclosed is a labor-saving binder clip, comprising a clip body (1) and a pair of rod members (40). The clip body comprises a pair of clamping parts (10), a rear part (20), and a pair of supporting parts (30); the clamping parts are elastically and integrally connected to the supporting parts and the rear part, so that the clip body forms an opening (31) and an accommodating cavity (34); the rod members are rotatably connected to the supporting parts, and the length of the rod members is greater than that of the clip body; the clip body is provided with abutting holes (35) and fulcrum parts (353), and the abutting holes are provided between the clamping parts and the rear part; when the rod members open the opening, the fulcrum parts are formed at abutting positions between the rod members and the upper edges of the abutting holes. Therefore, it is not necessary to provide protruding fulcrums between the clamping parts and the rod members, the structure is simple, and production processing is simplified with less effort.
D: Disclosed is an automatic folding crutch stool, comprising a crutch and a stool support connected to the crutch. The crutch comprises a handle (1) and a crutch body. The handle (1) is provided at an upper end of the crutch body. The crutch body is provided with a drive control device, a guide sleeve (6) capable of sliding and rotating on the crutch body, and a fixing base (11) capable of rotating on the crutch body. The stool support comprises at least two supporting rods. One end of one supporting rod is hinged to the guide sleeve (6), and one end of the other supporting rod is hinged to the fixing base (11). The supporting rods are hinged to one another in the middle. The drive control device drives the guide sleeve (6) to slide up and down and rotate along the crutch body. A control button of the drive control device is provided on the crutch body and close to the handle (1).
Answer: D