Abstract: The present disclosure relates to the technical field of medical appliances, and provides a dental handpiece and a head thereof, and a root canal preparation machine. The head of the dental handpiece comprises a head housing; a movement cavity is provided in the head housing; a rotatable movement and a driving gear are provided in the movement cavity; the driving gear is sleeved on one end of the movement, and the movement can move along the axial direction of the driving gear; a reciprocating driving mechanism is further provided in the movement cavity, and the reciprocating driving mechanism is used for driving the movement to perform reciprocating movement along its own axis.

Abstract: A holder, applied to an electronic vaporization device, includes: a liquid storage groove and an air inlet column provided at an end of the holder, an air hole being provided in the air inlet column, the air hole being in fluid communication with the liquid storage groove. The air inlet column is provided with a drainage structure surrounding the air hole. The drainage structure drains liquid to the liquid storage groove.

Abstract: A power supply component includes: a housing having an accommodating portion; and a holder arranged on the accommodating portion, a start airway being arranged on the holder, a vent channel being defined between an end of the holder connectable to a vaporization component and the housing, the vent channel being in communication with the start airway and outside air such that the outside air enters the start airway through the vent channel.

Abstract: A vaporizer includes: a base having a first cavity, and, on a bottom wall of the base, two electrode holes in communication with the first cavity; a vaporization core having a first electrode wire and a second electrode wire and mounted in the first cavity; and a first magnetic electrode and a second magnetic electrode. The first magnetic electrode is assembled in a first electrode hole of the two electrode holes and in contact with the first electrode wire electrically connectable to the first electrode wire. The second magnetic electrode is assembled in a second electrode hole of the two electrode holes and in contact with the second electrode wire electrically connectable to the second electrode wire.

Abstract: A vaporizer includes: a base having a first cavity, and, on a bottom wall of the base, two electrode holes in communication with the first cavity; a vaporization core having a first electrode wire and a second electrode wire and mounted in the first cavity; and a first magnetic electrode and a second magnetic electrode. The first magnetic electrode is assembled in a first electrode hole of the two electrode holes and in contact with the first electrode wire electrically connectable to the first electrode wire. The second magnetic electrode is assembled in a second electrode hole of the two electrode holes and in contact with the second electrode wire electrically connectable to the second electrode wire.

Abstract: The present disclosure relates to an atomizer and an electronic atomizing device. The atomizer includes a base, a sealing member, an atomizing core and a flow guiding member. The sealing member is arranged between the base and the atomizing core. The base is provided with an air inlet channel, and the sealing member is provided with a directing hole configured to guide air to the atomizing core. Taking a plane perpendicular to an axial direction of the atomizer as a reference plane, a distance between orthographic projections of the flow guiding member and the directing hole on the reference plane is greater than zero.

Abstract: The present disclosure relates to an atomizer and an electronic atomizing device. The atomizer includes a top cover assembly and an atomizing core at least partially received in the top cover assembly. The top cover assembly is provided with a guiding passage and an air guiding hole therein. An at least partially protruding or recessed structure is formed between the guiding passage and the air guiding hole. The atomizing core discharges an aerosol formed by atomizing a liquid into the air guiding hole via the guiding passage.

Abstract: The present disclosure relates to a sealing member, an atomizer, and an electronic atomizing device. The atomizer includes a sealing member and a fixedly disposed atomizing core. The atomizer is provided with a liquid storage chamber, a mounting hole, and an inhalation passage. The sealing member includes a pulling part, a first sealing part, and a second sealing part that is provided on the atomizing core, both the pulling part and the first sealing part are movable relative to the mounting hole such that the sealing member has a sealed state and a use state. In the sealed state, the pulling part, the first sealing part, and the second sealing part are connected to each other, and the first sealing part and the second sealing part respectively isolate and seal the inhalation passage and the atomizing core from the liquid storage chamber.

Abstract: The present disclosure relates to an atomizer and an electronic atomizing device. The atomizer includes a base assembly, an atomizing core and an electrode body. A mounting hole in fluidly communication with an outside atmosphere is formed in the base assembly. The atomizing core is at least partially located in the base assembly and used for atomizing liquid. The electrode body includes a conductive post electrically connected to the power supply and the atomizing core. The conductive post includes a cylinder portion with a circular cross-section. The cylinder portion is in interference fit with the mounting hole to seal the mounting hole.