Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a portable water toothpick. The portable water toothpick comprises a spray head (1) and an adapter (2), wherein the rear end of the adapter (2) is a connector (21) for butt jointing an externally matching water bottle (7); the middle portion of the connector (21) of the adapter (2) extends rearwards and is provided with a cylindrical body (22), and the cylindrical body (22) extends into the externally matching water bottle (7); and a sealing cavity (221) is arranged in the cylindrical body (22) in the axial direction thereof, the sealing cavity (221) is sealed from the outside, and a battery (3), an electric motor (4), a transmission mechanism (5) and a piston cylinder (6) are sequentially arranged in the sealing cavity (221) from the rear to the front in the axial direction of the cylindrical body (22). Internal mechanisms consisting of the electric motor (4), the battery (3), the piston cylinder (6), etc., of the water toothpick are arranged in a straight line, are packaged in the cylindrical body (22) in a sealed manner and then extend into the externally matching water bottle (7), so that the size of the water toothpick is minimized, and the water toothpick can basically be placed in a pocket when being carried around, and is extremely portable and convenient.
A: Disclosed is an atomizer, comprising: a pump housing (1) provided with an inner cavity (5) extending in the axial direction of the pump housing (1) and a mount being in communication with the inner cavity (5) and located at a first end of the pump housing (1); a sealing element (2) arranged in the mount and provided with a sealing sleeve (21) and a first through hole (22) which is positioned inside the sealing sleeve (21) and is coaxial with the inner cavity (5), wherein at least part of the sealing element (2) abuts against a mounting surface of the mount; a pressing member (3) at least partially arranged in the mount and abutting against the sealing element (2) to press the sealing element (2) and keep the sealing element (2) in the mount, wherein the pressing member (3) is provided with a second through hole coaxial with the inner cavity (5); and a plunger (4), wherein a first end of the plunger (4) penetrates the second through hole of the pressing member (3) and the first through hole (22) of the sealing element (2) and enters the inner cavity (5) of the pump housing (1) and can move in the inner cavity (5) in a reciprocating manner such that fluid can be pumped into and out of the inner cavity (5), and the pump housing (1), the pressing member (3), and the plunger (4) together define a sealed cavity to contain the sealing member (2).
B: A water flosser, comprising a nozzle (2), a body assembly (3) and a wireless induction charging base (3-2). The nozzle (2) is connected to the body assembly (3), and the body assembly (3) is fixed on the wireless induction charging base (3-2) so as to provide charging for the body assembly (3). A handle (2-1-1) has a hollow cavity along the length thereof, a spacing board (30-1) divides the hollow cavity of the handle (2-1-1) into an upper and a lower cavity, the upper cavity having disposed therein an upper internal assembly (6) and the lower cavity having disposed therein a lower internal assembly (11). The upper internal assembly (6) includes a water pump (15), the water pump (15) having a water inlet valve plate (15-6) and a water outlet valve plate (15-6-1) therein, the water inlet valve plate (15-6) and the water outlet valve plate (15-6-1) using a piston (15-3-1) and a connecting rod (15-3) in the water pump (15) to open and close; water in a chamber of the water pump (15) in the upper internal assembly (6) moves in an upper part of the handle (2-1-1) and a sealed cavity formed by the spacing board (30-1) and the lower internal assembly (11), and cannot flow into the lower internal assembly (11), solving the problem of insufficient water flosser use life caused by damage to a PCB circuit board (20) and motor (22) due to a water pump leaking.
C: An adapter for a liquid injector, comprising an adapter body. The adapter body comprises an injection port (1) into which the liquid injector can be inserted and a sealing cavity (2) matching a bottle opening; an abutting column (3) is provided between the injection port (1) and the sealing cavity (2); a liquid injection cavity (4) communicated with the injection port (1) is provided in the abutting column (3); a liquid outlet through hole (5) is provided on the side wall of the abutting column (3), and the sealing cavity (2) and the liquid injection cavity (4) are communicated with each other by means of the liquid outlet through hole (5). A sealed cavity in which liquid leakage is not easy to occur is formed by mounting the injector at the injection port of the adapter and mounting the sealing cavity on a pressing pump at the bottle opening; a liquid is injected into a bottle through a slit on the side wall of the pressing pump by means of the liquid injector, so that it is easy to use and carry and the liquid leakage is not easy to occur.
D: A self-resetting sealing needleless medical infusion connector, comprising: a connector and an infusion adapter. A lower portion of the connector comprises a male connector and a fixing nut. A fluid transport channel is provided in an inner cavity of the connector. The infusion adapter comprises an adapter top cover and an elastic sealing member. An upper portion of the connector is covered by and fixedly connected to a lower portion of the adapter top cover. The sealing member comprises a column body extending in a lengthwise direction of the fluid transport channel. An inner core of the column body comprises a blind hole having a downward opening. A slit that seals under normal conditions passes from a blind top surface of the blind hole to an upper end surface of the sealing member. The sealing member is fixedly provided in an inner cavity of the adapter top cover. A fixing external thread is provided circumferentially at an upper end surface of the adapter top cover. An insertion hole that matches a needleless male connector of an external infusion device is provided in an inner core of the adapter top cover. A small head section of a top end portion of the sealing member extends into the insertion hole and is connected to the same within a fitting tolerance thereof.
Answer: B