Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a hearing aid nipple, comprising a nipple frame (21), a hollow nipple (22) provided on one side of the nipple frame (21) and a container (23) provided on the other side of the nipple frame (21), with a vibration tongue (25) being arranged in the hollow part of the nipple (22), and the tail end of the vibration tongue (25) being fixed to the nipple frame (21), wherein a microphone (31) for receiving environmental sounds is arranged on the wall of the container (23), and in the container (23) are provided a circuit board (32) electrically connected with the microphone (31) and a vibration sensor (24) electrically connected with the circuit board (32) and used for converting the environmental sounds into a vibration wave. A hook (27) is also arranged on the wall of the container (23) and is in contact with the vibration sensor (24) to transfer the vibration waves. One end of the hook (27) that protrudes from the container (23) is detachably connected with one end of the vibration tongue (25) that protrudes from the nipple frame (21). Using the solution of the present invention enables infants with underdeveloped ear canals to hear environmental sounds, and the vibration tongue does not need to be disassembled during cleaning.
A: A hidden pacifier, relating to the field of maternal and baby devices, comprising a curved stop plate, a simulated nipple, a protective housing, and a limit ring. One side of the curved stop plate is disposed on the protective housing; the limit ring is provided in the protective housing; one side of the simulated nipple is connected to the protective housing; a stop plate air hole is provided on the curved stop plate, so as to prevent a baby from being unable to breathe due to swallowing by mistake; the side of the simulated nipple is connected to the protective housing by means of a nipple extension ring; the limit ring is annular and is mounted on the protective housing. The beneficial effects of the utility model are that: the limit ring on the device can maintain the nipple protruding state during use of the device without the need for a user to hold the position of the nipple for a long time, so that a baby can perform sucking better, thereby reducing the workload of the user and making the baby more confortable.
B: A multifunctional energy conservation and environmental protection device. A cavity of a box-type container (20) is divided by separators (23) into five or more compartments (21). An air vent (25) is provided on the upper part of each separator (23), and a water-passing hole (231) is provided on the lower part of each separator (23). A water filling opening (26) with a sealing cover (27) is provided on the top wall or/and a side wall of the box-type container (20), a medium inlet (10) is provided on the left side wall of the box-type container (20), and a medium passing opening (12) is provided on the right side wall of the box-type container (20). A sewage collection tank (35) is provided on the lower side of the box-type container (20), and is in communication with the bottom of the compartment (21) at the medium inlet (10) side by means of a sewage discharging pipe (34). One end of an overflow pipe (24) is in communication with the sewage collection tank (35), and an opening at the other end of the sewage collection tank (35) is located at a water line (29) of one or more compartments (21). A cleaning tank (30) is provided on the bottom wall of each compartment (21). A drain pipe (40) is provided on a side wall of the sewage collection tank (35). Air vents (25) on at least the first separator (23) and the last separator (23) are provided with air filter nets (22). The multifunctional energy conservation and environmental protection device is suitable for processing or recycling waste water or gas comprising dust and impurities.
C: A spreading box vibration device, comprising a vibration grid (1), a vibration unit (2) and a grid fixing unit (3), wherein the vibration unit (2) is clamped between sub-grids (11) of the vibration grid (1) by means of a recess; the vibration grid (1) is fixed in a spreading box by means of the grid fixing unit (3); the vibration unit (2) further comprises a vibration electric motor (23), an electric motor fixing member (24), an eccentric wheel (25), a drive shaft (26), a control board (27), a magnetic sensor (28) and a magnet (29); the control board (27) is fixed at one end of the vibration electric motor (23); the magnetic sensor (28) is fixed at the end of the control board (27) that is away from the vibration electric motor (23); the drive shaft (26) penetrates the vibration electric motor (23); one end of the drive shaft (26) is fixedly connected to the eccentric wheel (25), and the other end thereof passes through a through hole and is fixedly connected to the magnet (29); the electric motor fixing member (24) is sleeved on the vibration electric motor (23); and the electric motor fixing member (24) is embedded in a recess inside an upper cover (21). In the spreading box vibration device, the vibration unit can generate vibration to drive the vibration grid to vibrate such that materials in the spreading box are in a uniform granule state, thereby achieving more uniform spreading. A spreading box and an unmanned aerial vehicle for use in spreading are further related to.
D: An ICU-special portable atomizing device enabling autonomously breathing according to airflow, comprising an atomization control host (03), an atomization generator (02), and a tee connecting pipe (01). The atomization generator (02) comprises a bottom housing (21), a medicinal solution tank (22), a medicinal solution outlet (23), an air guide port (24), a nozzle tube (25), a partition (26), and an atomization sheet (27), and is provided with a first circuit board (28) connected to the atomizing sheet (27) in the bottom housing (21). The partition (26) in the nozzle tube (25) separates the interior of the nozzle tube to form an atomization cavity (29) communicated with the medicinal solution outlet (23) and an air cavity (210) communicated with the air guide port (24). A sensor (211) connected to the first circuit board (28) is provided in the air cavity (210). The nozzle tube on one side of the air cavity (210) is provided with a cross-section stopper (212) that blocks the opening of the air cavity. A first ventilation port (213) and a second ventilation port (214) communicated with the air cavity (210) are respectively provided on both sides of the stopper (212). The first circuit board (28) extends to the outside of the bottom housing and is connected to the atomization generator (02).
Answer: A