Patent Description:
An ultrasonic atomization core is disclosed in <CIT> and <CIT>, respectively.

An existing ultrasonic atomization core comprises an atomization sleeve, and an ultrasonic atomization sheet and e-liquid guide cotton that communicates the outside with an atomization surface of the ultrasonic atomization sheet are arranged in the atomization sleeve. When working, the e-liquid guide cotton guides outside liquid smoke generation matters to the ultrasonic atomization sheet for atomizing to generate smoke.

The existing ultrasonic atomization sheet is generally planar, and the temperature at its center position is relatively high, so that the e-liquid guide cotton in contact with the ultrasonic atomization sheet is easily burnt through and burnt out, which affects the atomization effect and shortens the service lives of the e-liquid guide cotton and the ultrasonic atomization sheet. Meanwhile, the planar ultrasonic atomization sheet does not have the effect of accumulating energy, which requires higher working power, so the power endurance is low. In addition, when the atomization core is installed in a housing of an atomizer, a cylindrical elastic electrode of the atomizer directly abuts against the center of the ultrasonic atomization sheet, so that the ultrasonic atomization sheet is easily broken with a little force during assembly.

In the existing ultrasonic atomizer, the ultrasonic atomization core is arranged in the housing, and the atomization core is connected with the housing through a connecting sleeve. In the prior art, in order to ensure the reliability of connection between the atomization core and the housing, an upper section of the atomization core is usually riveted and connected into a lower section of the connecting sleeve. When the atomization core is damaged, the atomization core cannot be replaced separately, so the ultrasonic atomizer is discarded as a whole, and the use cost is high.

In view of the above-mentioned shortcomings of the prior art, it is an object to provide an improved ultrasonic atomization core, ultrasonic atomizer and ultrasonic electronic cigarette, where e-liquid is guided to the center of an ultrasonic atomization sheet more easily, making it difficult for the e-liquid guide cotton to be burnt through or be burnt out, the atomization effect is good, and the service lives of the e-liquid guide cotton and the ultrasonic atomization sheet are long; the ultrasonic atomization sheet can effectively accumulate energy to generate smoke by means of atomization, so low working power is required, and the power endurance is strong; during assembly, the ultrasonic atomization sheet is stressed uniformly and is difficult to break; and the atomization core can be replaced separately, which reduces the use cost.

In order to solve the above technical problems, an ultrasonic atomization core according to claim <NUM> is provided.

With the above structure, since the atomization surface of the ultrasonic atomization sheet is a concave surface, and the e-liquid guide cotton has a convex surface in contact with the atomization surface of the ultrasonic atomization sheet, the e-liquid guide cotton accelerates e-liquid guide by means of the curvature of the convex surface itself on the surface in contact with the concave surface, liquid smoke generation matters quickly flow to the center position of the ultrasonic atomization sheet, the center position of the ultrasonic atomization sheet with a higher temperature can be timely replenished with liquid, the temperature of the center position of the ultrasonic atomization sheet can be reduced, the e-liquid guide cotton at the center position of the ultrasonic atomization sheet can be prevented from being burnt through due to excessive temperature, the ultrasonic atomization sheet would not stop working due to dry burning, the atomization effect is good, and the e-liquid guide cotton and the ultrasonic atomization sheet have long service lives. Meanwhile, the area of curved contact surface between the e-liquid guide cotton and the ultrasonic atomization sheet is larger, more smoke is generated by means of atomization, the amount of smoke is guaranteed, users' requirements for smoke are met, and the user experience is improved. In addition, because the concave atomization surface of the ultrasonic atomization sheet has the function of focusing energy, the required working power is low and the power endurance is strong.

The atomization surface of the ultrasonic atomization sheet is a concave surface, and the e-liquid guide cotton has a convex surface in contact with the concave surface of the ultrasonic atomization sheet. When the ultrasonic atomization sheet is working, the ultrasonic atomization sheet generates high-frequency oscillation, making liquid smoke generation matters to scatter and splash to the edge of the concave surface on the concave surface of the ultrasonic atomization sheet, so many droplets are accumulated on the concave surface, and the droplets are easily absorbed by the e-liquid guide cotton and flow back to the concave surface to participate in the atomization again, thereby saving the liquid smoke generation matters, reducing the use cost, and also preventing users from inhaling the splashed droplets.

The curvature of the convex surface of the e-liquid guide cotton is greater than the curvature of the atomization surface of the ultrasonic atomization sheet. When the curvature of the convex surface of the e-liquid guide cotton is equal to the curvature of the atomization surface of the ultrasonic atomization sheet, the liquid smoke generation matters are guided more easily on the curved contact surface. When the curvature of the convex surface of the e-liquid guide cotton is greater than the curvature of the atomization surface of the ultrasonic atomization sheet, a part of the liquid smoke generation matters remains in the gap between the convex surface of the e-liquid guide cotton and the atomization surface of the ultrasonic atomization sheet. Once replenished, the liquid smoke generation matters can flow to the center of the ultrasonic atomization sheet faster through the gap, so that the effects of liquid guide and atomization are better, the user smokes the same amount of smoke per puff with identical taste, and the user experience is improved.

As a preferred mode, the ultrasonic atomization sheet is spherical, the e-liquid guide cotton has a spherical portion, the curvature of the spherical portion of the e-liquid guide cotton is greater than the curvature of the spherical ultrasonic atomization sheet, and the convex surface of the spherical portion of the e-liquid guide cotton is in contact with the concave surface of the ultrasonic atomization sheet.

With the above structure, the ultrasonic atomization sheet and the e-liquid guide cotton are more convenient to fabricate.

As a preferred mode, the central axis of the spherical portion of the e-liquid guide cotton is collinear with the central axis of the ultrasonic atomization sheet.

Further, the ultrasonic atomization core further comprises an inner sleeve sleeved in the atomization sleeve, the e-liquid guide cotton further comprises a hollow cylindrical portion, the hollow cylindrical portion is connected with the spherical portion to form a cup-shaped structure, the hollow cylindrical portion is sandwiched between the atomization sleeve and the inner sleeve, and the atomization sleeve is provided with a through hole that communicates the hollow cylindrical portion with the outside.

Further, the ultrasonic atomization core further comprises a cotton pressing structure, one end of the cotton pressing structure abuts against the inner sleeve, and the other end of the cotton pressing structure abuts against the concave surface of the spherical portion of the e-liquid guide cotton.

The cotton pressing structure can ensure reliable contact between the e-liquid guide cotton and the atomization surface.

As a preferred mode, the cotton pressing structure comprises a ring portion and at least three first elastic strands, fixed ends of the first elastic strands are connected with the ring portion, free ends of the first elastic strands abut against the spherical portion of the e-liquid guide cotton, and the ring portion abuts against the inner sleeve.

As a preferred mode, the first elastic strands are uniformly arranged along the circumference of the ring portion, and the free ends of the first elastic strands are arc-shaped and attached to the concave surface of the spherical portion of the e-liquid guide cotton, so that the e-liquid guide cotton is uniformly stressed.

Based on the same concept, the present invention further provides an ultrasonic atomizer as set forth in claim <NUM>, comprising a housing in which the ultrasonic atomization core is arranged.

Further, the housing is provided with an elastic electrode that abuts against the convex surface of the ultrasonic atomization sheet.

As a preferred mode, the elastic electrode comprises a cylindrical portion and at least three second elastic strands, fixed ends of the second elastic strands are connected with the cylindrical portion, and free ends of the second elastic strands abut against the convex surface of the ultrasonic atomization sheet.

The elastic electrode with the above-mentioned structure can ensure that four sides of the ultrasonic atomization sheet are stressed uniformly, prevent the ultrasonic atomization sheet from being broken due to a single direction of force applied thereto, and is easy to assemble.

As a preferred mode, the second elastic strands are uniformly arranged on an end surface of the cylindrical portion, and the free ends of the second elastic strands are arc-shaped and attached to the convex surface of the ultrasonic atomization sheet.

As another preferred mode, the atomization core is connected to the housing through a connecting sleeve; the housing comprises a top cover, a base and a bottom cover that are connected in sequence, the base is detachably connected to the bottom cover, a middle section of the outer side wall of the atomization core is in clearance fit with the inner side wall of the base, an upper section of the outer side wall of the atomization core is provided with an external threaded portion, and the inner side wall of the connecting sleeve is provided with an internal threaded portion matching the external threaded portion.

With the above structure, the atomization core is screwed and fixed with the connecting sleeve. When the atomization core is to be replaced, the bottom cover is removed from the base to expose the lower section of the atomization core, and the lower section of the atomization core is held by hand and rotated to take out the atomization core from the housing of the atomizer, so that the atomization core is replaced separately, the discard of the whole atomizer is avoided when the atomization core is damaged, the operation is simple and convenient, and the use cost is reduced.

Further, a bottom end of the atomization core abuts against an inner bottom surface of the bottom cover.

The bottom end of the atomization core abuts against the inner bottom surface of the bottom cover, so that the atomization core has better stability after assembly.

Further, an e-liquid bin is arranged in the top cover, and the atomization sleeve is provided with a through hole that communicates the e-liquid guide cotton with the e-liquid bin; a middle section of the outer side wall of the atomization sleeve is in clearance fit with the inner side wall of the base, and the external threaded portion is arranged on an upper section of the outer side wall of the atomization sleeve.

Further, the connecting sleeve has a baffle portion opposite to an upper part of the through hole, and an e-liquid passing gap that communicates the e-liquid bin with the through hole is formed between the baffle portion and the atomization sleeve.

During normal smoking, the baffle portion does not completely cover the through hole, and e-liquid in the e-liquid bin passes through the e-liquid passing gap and the through hole in sequence to supply e-liquid for the e-liquid guide cotton. When the atomization core is removed, the e-liquid at the through hole slowly flows through the baffle portion and flows into the e-liquid bin with the removal of the atomization core, so as to prevent e-liquid leakage when the atomization core is removed. Due to the baffle portion, when the atomization core is removed, a lot of e-liquid can be stored in the e-liquid bin, which prevents the e-liquid in the e-liquid bin from overflowing during the removal of the atomization core.

Further, a top of the top cover is provided with a suction nozzle that is axially rotatable about the axis of the top cover, and the suction nozzle is provided with an e-liquid injection hole that can be aligned or misaligned with the e-liquid passing hole of the e-liquid bin.

The suction nozzle is rotated, making the e-liquid injection hole to align or misalign with the e-liquid passing hole to open or close the e-liquid bin for injecting e-liquid.

Further, the ultrasonic atomizer further comprises a driving mechanism, and the rotation of the suction nozzle drives the connecting sleeve through the driving mechanism to move axially along an electronic cigarette to open or close the through hole; the inner side wall of the connecting sleeve has an inner smooth portion above the internal threaded portion, and the outer side wall of the atomization sleeve has an outer smooth portion below the external threaded portion; when the connecting sleeve moves axially along the electronic cigarette, the inner smooth portion is opposite to the external threaded portion, and the outer smooth portion is opposite to the internal threaded portion.

With the above structure, when e-liquid is to be injected, the suction nozzle is rotated to open the e-liquid passing hole on the e-liquid bin, and the rotation of the suction nozzle drives the connecting sleeve through the driving mechanism to move axially to close the through hole, so as to prevent e-liquid leakage during e-liquid injection. After the e-liquid is injected, the suction nozzle is rotated to close the e-liquid passing hole on the e-liquid bin, and the rotation of the suction nozzle drives the connecting sleeve through the driving mechanism to move axially to open the through hole, so as to normally guide e-liquid for smoking.

When the connecting sleeve moves axially along the electronic cigarette, the inner smooth portion is opposite to the external threaded portion, and the outer smooth portion is opposite to the internal threaded portion. Accordingly, during the movement of the connecting sleeve, the connecting sleeve also moves axially relative to the atomization core. Therefore, the connecting sleeve would not get stuck and fail to close or open the through hole, and the atomization core would not be separated from the e-liquid bin or shake due to the axial movement of the connecting sleeve.

As a preferred mode, the driving mechanism comprises a fixing sleeve, an upper section of the fixing sleeve is fixedly connected with the suction nozzle, a lower section of the fixing sleeve passes through an air guide hole on the e-liquid bin and is in clearance fit with the e-liquid bin, a top section of the outer side wall of the connecting sleeve is screwed with a top section of the inner side wall of the fixing sleeve, a middle section of the outer side wall of the connecting sleeve has an outer limit plane that limits the circumferential rotation of the connecting sleeve, and the inner side wall of the air guide hole has an inner limit plane corresponding to the outer limit plane.

With the above structure, the upper section of the fixing sleeve is fixedly connected with the suction nozzle, the lower section of the fixing sleeve is arranged in the air guide hole, the fixing sleeve can rotate circumferentially relative to the e-liquid bin, and the rotation of the suction nozzle can drive the fixing sleeve to rotate circumferentially relative to the e-liquid bin. Due to the coordination of the outer limit plane and the inner limit plane, the circumferential rotation of the connecting sleeve is limited. Therefore, when the suction nozzle is rotated, the fixing sleeve rotates and the fixing sleeve is axially fixed, which drives the connecting sleeve to move up and down relative to the e-liquid bin, that is, when the suction nozzle is rotated, the connecting sleeve moves axially along the electronic cigarette to open or close the through hole.

Further, a sealing ring is arranged between the outer side wall of the atomization sleeve and the inner side wall of the base to prevent e-liquid leakage of the e-liquid bin.

Based on the same concept, the present invention further provides an ultrasonic electronic cigarette, according to claim <NUM>, comprising the ultrasonic atomizer.

Compared with the prior art, the present teachings have the following advantages:.

In the <FIG> atomization sleeve, <NUM> through hole, <NUM> outer smooth portion, <NUM> ultrasonic atomization sheet, <NUM> e-liquid guide cotton, <NUM> spherical portion, <NUM> hollow cylindrical portion, <NUM> inner sleeve, <NUM> cotton pressing structure, <NUM> ring portion, <NUM> first elastic strand, <NUM> housing, <NUM> top cover, <NUM> base, <NUM> hook, <NUM> bottom cover, <NUM> clamping groove, <NUM> elastic electrode, <NUM> cylindrical portion, <NUM> second elastic strand, <NUM> connecting sleeve, <NUM> internal threaded portion, <NUM> baffle portion, <NUM> outer limit plane, <NUM> inner smooth portion, <NUM> suction nozzle, <NUM> air inlet, <NUM> e-liquid injection hole, <NUM> e-liquid bin, <NUM> e-liquid passing hole, <NUM> air guide hole, <NUM> inner limit plane, <NUM> sealing gasket, <NUM> silica gel seat, <NUM> electrode ring, <NUM> air pipe, <NUM> air outlet passage, <NUM> protective sheet, <NUM> atomization core, <NUM> external threaded portion, <NUM> e-liquid passing gap, <NUM> fixing sleeve, <NUM> sealing ring.

As shown in <FIG>, an ultrasonic atomization core <NUM> comprises an atomization sleeve <NUM>, an ultrasonic atomization sheet <NUM> and e-liquid guide cotton <NUM> that communicates the outside with an atomization surface of the ultrasonic atomization sheet <NUM> are arranged in the atomization sleeve <NUM>, the ultrasonic atomization sheet <NUM> is spherical, the e-liquid guide cotton <NUM> has a spherical portion <NUM>, the curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is greater than the curvature of the spherical ultrasonic atomization sheet <NUM>, and a convex surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is in contact with a concave surface of the ultrasonic atomization sheet <NUM>. The central axis of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is collinear with the central axis of the ultrasonic atomization sheet <NUM>.

The ultrasonic atomization sheet <NUM> is spherical, and when the ultrasonic atomization sheet <NUM> is working, liquid smoke generation matters atomized by ultrasonic are splashed around. When splashed droplets are accumulated on the spherical surface of the ultrasonic atomization sheet <NUM>, the droplets can slide down to the center position of the ultrasonic atomization sheet <NUM> along with the spherical surface, and be recovered and atomized again. The e-liquid guide cotton <NUM> has a spherical portion <NUM> in contact with the concave surface of the ultrasonic atomization sheet <NUM>, and when the ultrasonic atomization sheet <NUM> is working, the splashed droplets are directly absorbed by the spherical portion <NUM>, so there are more liquid smoke generation matters on the spherical contact surface of the e-liquid guide cotton <NUM>, and the smoke generation matters are guided more easily under the effect of gravity generated due to the curvature of the spherical surface and flow to the center position of the ultrasonic atomization sheet <NUM> more easily, so that the center position of the ultrasonic atomization sheet <NUM> with a higher temperature can be timely replenished with liquid, the temperature of the center position of the ultrasonic atomization sheet <NUM> can be reduced, the e-liquid guide cotton <NUM> can be prevented from being burnt through due to excessive temperature at the center position of the ultrasonic atomization sheet <NUM>, the ultrasonic atomization sheet <NUM> would not be burnt out and has good working continuity and good atomization effect, and the e-liquid guide cotton <NUM> and the ultrasonic atomization sheet <NUM> have long service lives. Meanwhile, the area of spherical contact surface between the e-liquid guide cotton <NUM> and the ultrasonic atomization sheet <NUM> is larger, and more smoke is generated by means of atomization. The direction of smoke atomization is shown in <FIG>. In addition, because the spherical ultrasonic atomization sheet <NUM> has the function of focusing energy, the required working power is low and the power endurance is strong. The curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> may be greater than the curvature of the spherical ultrasonic atomization sheet <NUM>. When the curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is equal to the curvature of the spherical ultrasonic atomization sheet <NUM>, the liquid smoke generation matters are guided more easily on the spherical contact surface. As shown in <FIG>, when the curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is greater than the curvature of the spherical ultrasonic atomization sheet <NUM>, a part of the liquid smoke generation matters remains in the gap between the spherical portion <NUM> of the e-liquid guide cotton <NUM> and the atomization surface of the ultrasonic atomization sheet <NUM>, so that the liquid smoke generation matters can flow to the center of the ultrasonic atomization sheet <NUM> more easily, and the effects of liquid guide and atomization are better.

The ultrasonic atomization core <NUM> further comprises an inner sleeve <NUM> sleeved in the atomization sleeve <NUM>, the e-liquid guide cotton <NUM> further comprises a hollow cylindrical portion <NUM>, the hollow cylindrical portion <NUM> is connected with the spherical portion <NUM> to form a cup-shaped structure, the hollow cylindrical portion <NUM> is sandwiched between the atomization sleeve <NUM> and the inner sleeve <NUM>, and the atomization sleeve <NUM> is provided with a through hole <NUM> that communicates the hollow cylindrical portion <NUM> with the outside.

The ultrasonic atomization core <NUM> further comprises a cotton pressing structure <NUM>, one end of the cotton pressing structure <NUM> abuts against the inner sleeve <NUM>, and the other end of the cotton pressing structure <NUM> abuts against the concave surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM>. The cotton pressing structure <NUM> can ensure reliable contact between the e-liquid guide cotton <NUM> and the atomization surface.

The cotton pressing structure <NUM> comprises a ring portion <NUM> and four first elastic strands <NUM>, fixed ends of the first elastic strands <NUM> are connected with the ring portion <NUM>, and free ends of the first elastic strands <NUM> abut against the spherical portion <NUM> of the e-liquid guide cotton <NUM>. The first elastic strands <NUM> are uniformly arranged along the circumference of the ring portion <NUM>, the free ends of the first elastic strands <NUM> are arc-shaped and attached to the concave surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM>, and the ring portion <NUM> abuts against the inner sleeve <NUM>, so that the e-liquid guide cotton <NUM> is uniformly stressed.

As shown in <FIG>, an ultrasonic atomizer comprises a housing <NUM> in which the ultrasonic atomization core <NUM> is arranged.

The housing <NUM> is provided with an elastic electrode <NUM> that abuts against the convex surface of the ultrasonic atomization sheet <NUM>.

The elastic electrode <NUM> comprises a cylindrical portion <NUM> and four second elastic strands <NUM>, fixed ends of the second elastic strands <NUM> are connected with the cylindrical portion <NUM>, and free ends of the second elastic strands <NUM> abut against the convex surface of the ultrasonic atomization sheet <NUM>. The second elastic strands <NUM> are uniformly arranged on an end surface of the cylindrical portion <NUM>, and the free ends of the second elastic strands <NUM> are arc-shaped and attached to the convex surface of the ultrasonic atomization sheet <NUM>. The elastic electrode <NUM> with the above-mentioned structure can ensure that four sides of the ultrasonic atomization sheet <NUM> are stressed uniformly, can prevent the ultrasonic atomization sheet <NUM> from being broken due to a single direction of force applied thereto, and it is easy to assemble the ultrasonic atomization sheet <NUM>.

The housing <NUM> comprises a top cover <NUM>, a base <NUM> and a bottom cover <NUM> that are connected in sequence.

The atomization core <NUM> is connected with the top cover <NUM> through a connecting sleeve <NUM> and arranged in the top cover <NUM>.

A top of the top cover <NUM> is provided with a rotatable suction nozzle <NUM>. The suction nozzle <NUM> is provided with an air inlet <NUM> and an e-liquid injection hole <NUM>.

An e-liquid bin <NUM> is arranged in the top cover <NUM>. The through hole <NUM> communicates the hollow cylindrical portion <NUM> with the e-liquid bin <NUM>. The suction nozzle <NUM> is rotated, making the e-liquid injection hole <NUM> to align or misalign with an e-liquid passing hole <NUM> of the e-liquid bin <NUM>, to open or close the e-liquid bin <NUM> for injecting e-liquid.

A sealing gasket <NUM> is arranged between the e-liquid bin <NUM> and the suction nozzle <NUM>.

The ultrasonic atomization sheet <NUM> is fixed in the bottom cover <NUM> through a silica gel seat <NUM>.

The elastic electrode <NUM> is arranged at the bottom of the bottom cover <NUM>. The bottom cover <NUM> is further provided with an electrode ring <NUM>. A protective sheet <NUM> is arranged in the bottom cover <NUM>.

An air pipe <NUM> is arranged in the housing <NUM>, one end of the air pipe <NUM> is connected with the suction nozzle <NUM> and communicated with the air inlet <NUM>, and the other end of the air pipe <NUM> extends into the inner sleeve <NUM> and is opposite to the concave surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM>. The air inlet <NUM>, the air pipe <NUM>, the concave surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM>, an air outlet passage <NUM>, and the suction nozzle <NUM> are communicated in sequence.

As shown in <FIG>, an ultrasonic atomizer in an ultrasonic electronic cigarette comprises a housing <NUM>, an atomization core <NUM> is arranged in the housing <NUM>, and the atomization core <NUM> is connected to the housing <NUM> through a connecting sleeve <NUM>; the housing <NUM> comprises a top cover <NUM>, a base <NUM> and a bottom cover <NUM> connected in sequence, the base <NUM> is detachably connected with the bottom cover <NUM>, a middle section of the outer side wall of the atomization core <NUM> is in clearance fit with the inner side wall of the base <NUM>, an upper section of the outer side wall of the atomization core <NUM> is provided with an external threaded portion <NUM>, and the inner side wall of the connecting sleeve <NUM> is provided with an internal threaded portion <NUM> matching the external threaded portion <NUM>. When the atomization core <NUM> is assembled, the external threaded portion <NUM> is fixedly connected to the internal threaded portion <NUM>. When the atomization core <NUM> is removed, the bottom cover <NUM> is removed from the base <NUM> to expose a lower section of the atomization core <NUM>, and the lower section of the atomization core <NUM> is held by hand and rotated to take out the atomization core <NUM> from the housing <NUM> of the atomizer, so that the atomization core <NUM> is replaced separately, the discard of the whole atomizer is avoided when the atomization core <NUM> is damaged, and the use cost is reduced.

In this embodiment, the bottom cover <NUM> is connected with the base <NUM> by a hook, the inner side wall of the bottom cover <NUM> is provided with a clamping groove <NUM>, and the outer side wall of the base <NUM> is provided with a hook <NUM> matching the clamping groove <NUM>. When the atomization core <NUM> is removed, the bottom cover <NUM> is pulled out first to separate the clamping groove <NUM> from the hook <NUM>, and then the atomization core <NUM> can be removed, which can protect the atomization core <NUM> from external dust pollution and improve the purity of smoke.

A bottom end of the atomization core <NUM> abuts against an inner bottom surface of the bottom cover <NUM>. The bottom end of the atomization core <NUM> abuts against the inner bottom surface of the bottom cover <NUM>, so that the atomization core <NUM> has better electrical connection stability after assembly.

An e-liquid bin <NUM> is arranged in the top cover <NUM>, the atomization core <NUM> comprises an atomization sleeve <NUM>, an ultrasonic atomization sheet <NUM> and e-liquid guide cotton <NUM> connected with an atomization surface of the ultrasonic atomization sheet <NUM> are arranged in the atomization sleeve <NUM>, and the atomization sleeve <NUM> is provided with a through hole <NUM> that communicates the e-liquid guide cotton <NUM> with the e-liquid bin <NUM>; a middle section of the outer side wall of the atomization sleeve <NUM> is in clearance fit with the inner side wall of the base <NUM>, and the external threaded portion <NUM> is arranged on an upper section of the outer side wall of the atomization sleeve <NUM>.

The connecting sleeve <NUM> has a baffle portion <NUM> opposite to an upper part of the through hole <NUM>, and an e-liquid passing gap <NUM> that communicates the e-liquid bin <NUM> with the through hole <NUM> is formed between the baffle portion <NUM> and the atomization sleeve <NUM>.

During normal smoking, the baffle portion <NUM> does not completely cover the through hole <NUM>, and e-liquid in the e-liquid bin <NUM> passes through the e-liquid passing gap <NUM> and the through hole <NUM> in sequence to supply e-liquid for the e-liquid guide cotton <NUM>. When the atomization core <NUM> is removed, the e-liquid at the through hole <NUM> slowly flows through the baffle portion <NUM> and flows into the e-liquid bin <NUM> with the removal of the atomization core <NUM>, so as to prevent e-liquid leakage when the atomization core <NUM> is removed. Due to the baffle portion <NUM>, when the atomization core <NUM> is removed, a lot of e-liquid can be stored in the e-liquid bin <NUM>, which prevents the e-liquid from overflowing.

A top of the top cover <NUM> is provided with a suction nozzle <NUM> that is axially rotatable about the axis of the top cover, and the suction nozzle <NUM> is provided with an e-liquid injection hole <NUM> that can be aligned or misaligned with the e-liquid passing hole <NUM> of the e-liquid bin <NUM>.

The suction nozzle <NUM> is rotated to make the e-liquid injection hole <NUM> to align or misalign with the e-liquid passing hole <NUM> to open or close the e-liquid bin <NUM> for injecting e-liquid.

The atomizer further comprises a driving mechanism, and the rotation of the suction nozzle <NUM> drives the connecting sleeve <NUM> through the driving mechanism to move axially along the electronic cigarette to open or close the through hole <NUM>; the inner side wall of the connecting sleeve <NUM> has an inner smooth portion <NUM> above the internal threaded portion <NUM>, and the outer side wall of the atomization sleeve <NUM> has an outer smooth portion <NUM> below the external threaded portion <NUM>; when the connecting sleeve <NUM> moves axially along the electronic cigarette, the inner smooth portion <NUM> is opposite to the external threaded portion <NUM>, and the outer smooth portion <NUM> is opposite to the internal threaded portion <NUM>, so that the connecting sleeve <NUM> would not get stuck and fail to close or open the through hole <NUM>, and the atomization core <NUM> would not be separated from the e-liquid bin or shake due to the axial movement of the connecting sleeve <NUM>.

When e-liquid is to be injected, the suction nozzle <NUM> is rotated to open the e-liquid passing hole <NUM> on the e-liquid bin <NUM>, and the rotation of the suction nozzle <NUM> drives the connecting sleeve <NUM> through the driving mechanism to move axially to close the through hole <NUM>, so as to prevent e-liquid leakage during e-liquid injection. After the e-liquid is injected, the suction nozzle <NUM> is rotated to close the e-liquid passing hole <NUM> on the e-liquid bin <NUM>, and the rotation of the suction nozzle <NUM> drives the connecting sleeve <NUM> through the driving mechanism to move axially to open the through hole <NUM>, so as to normally guide e-liquid for smoking.

The driving mechanism comprises a fixing sleeve <NUM>, an upper section of the fixing sleeve <NUM> is fixedly connected with the suction nozzle <NUM>, a lower section of the fixing sleeve <NUM> passes through an air guide hole <NUM> on the e-liquid bin <NUM> and is in clearance fit with the e-liquid bin <NUM>, a top section of the outer side wall of the connecting sleeve <NUM> is screwed with a top section of the inner side wall of the fixing sleeve <NUM>, a middle section of the outer side wall of the connecting sleeve <NUM> has an outer limit plane <NUM> that limits the circumferential rotation of the connecting sleeve <NUM>, and the inner side wall of the air guide hole <NUM> has an inner limit plane <NUM> corresponding to the outer limit plane <NUM>.

The upper section of the fixing sleeve <NUM> is in clearance fit with the suction nozzle <NUM>, the lower section of the fixing sleeve <NUM> is arranged in the air guide hole <NUM>, the fixing sleeve <NUM> can rotate circumferentially relative to the e-liquid bin <NUM>, and the rotation of the suction nozzle <NUM> can drive the fixing sleeve <NUM> to rotate circumferentially relative to the e-liquid bin <NUM>. Due to the coordination of the outer limit plane <NUM> and the inner limit plane <NUM>, the circumferential rotation of the connecting sleeve <NUM> is limited. Therefore, when the suction nozzle <NUM> is rotated, the fixing sleeve <NUM> rotates and the fixing sleeve <NUM> is axially fixed, which drives the connecting sleeve <NUM> to move up and down relative to the e-liquid bin <NUM>, that is, when the suction nozzle <NUM> is rotated, the connecting sleeve <NUM> moves axially along the electronic cigarette to open or close the through hole <NUM>.

The ultrasonic atomization sheet <NUM> is spherical, the e-liquid guide cotton <NUM> has a spherical portion <NUM>, the curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is greater than the curvature of the spherical ultrasonic atomization sheet <NUM>, and the convex surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is in contact with the concave surface of the ultrasonic atomization sheet <NUM>.

Since the ultrasonic atomization sheet <NUM> is spherical, and the e-liquid guide cotton <NUM> has a spherical portion <NUM> in contact with the concave surface of the ultrasonic atomization sheet <NUM>, the e-liquid guide cotton <NUM> guides e-liquid more easily on the spherical contact surface, the e-liquid can flow to the center position of the ultrasonic atomization sheet <NUM> more easily, the center position of the ultrasonic atomization sheet <NUM> with a higher temperature can be timely replenished with liquid, the temperature of the center position of the ultrasonic atomization sheet <NUM> can be reduced, the e-liquid guide cotton <NUM> can be prevented from being burnt through due to excessive temperature at the center position of the ultrasonic atomization sheet <NUM>, the ultrasonic atomization sheet <NUM> would not be dried out, the atomization effect is good, and the e-liquid guide cotton <NUM> and the ultrasonic atomization sheet <NUM> have long service lives. Meanwhile, the area of spherical contact surface between the e-liquid guide cotton <NUM> and the ultrasonic atomization sheet <NUM> is larger, and more smoke is generated by means of atomization. The direction of smoke atomization is shown in <FIG>. In addition, because the spherical ultrasonic atomization sheet <NUM> has the function of focusing energy, the required working power is low and the power endurance is strong.

The curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> may be greater than the curvature of the spherical ultrasonic atomization sheet <NUM>. When the curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is equal to the curvature of the spherical ultrasonic atomization sheet <NUM>, the e-liquid is guided faster on the spherical contact surface. As shown in <FIG>, when the curvature of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is greater than the curvature of the spherical ultrasonic atomization sheet <NUM>, a certain gap is formed when the spherical portion <NUM> of the e-liquid guide cotton <NUM> is in contact with the concave surface of the ultrasonic atomization sheet <NUM>, and a part of the e-liquid remains in the gap, so that the e-liquid can flow to the center of the ultrasonic atomization sheet <NUM> more easily, and the effects of liquid guide and atomization are better.

The central axis of the spherical portion <NUM> of the e-liquid guide cotton <NUM> is collinear with the central axis of the ultrasonic atomization sheet <NUM>.

The atomizer further comprises an inner sleeve <NUM> sleeved in the atomization sleeve <NUM>, the e-liquid guide cotton <NUM> further comprises a hollow cylindrical portion <NUM>, the hollow cylindrical portion <NUM> is connected with the spherical portion <NUM> to form a cup-shaped structure, the hollow cylindrical portion <NUM> is sandwiched between the atomization sleeve <NUM> and the inner sleeve <NUM>, and the atomization sleeve <NUM> is provided with a through hole <NUM> that communicates the hollow cylindrical portion <NUM> with the outside.

The atomizer further comprises a cotton pressing structure <NUM>, one end of the cotton pressing structure <NUM> abuts against the inner sleeve <NUM>, and the other end of the cotton pressing structure <NUM> abuts against the concave surface of the spherical portion <NUM> of the e-liquid guide cotton <NUM>. The cotton pressing structure <NUM> is a spring.

The cotton pressing structure <NUM> can ensure reliable contact between the e-liquid guide cotton <NUM> and the atomization surface.

A sealing ring <NUM> is arranged between the outer side wall of the atomization sleeve <NUM> and the inner side wall of the base <NUM> to prevent e-liquid leakage of the e-liquid bin.

The bottom cover <NUM> is provided with an elastic electrode <NUM> that abuts against the convex surface of the ultrasonic atomization sheet <NUM>.

The suction nozzle <NUM> is provided with an air inlet <NUM>.

Claim 1:
An ultrasonic atomization core, comprising an atomization sleeve (<NUM>), an ultrasonic atomization sheet (<NUM>) and e-liquid guide cotton (<NUM>) that communicates the outside with an atomization surface of the ultrasonic atomization sheet (<NUM>) are arranged in the atomization sleeve (<NUM>), wherein the atomization surface of the ultrasonic atomization sheet (<NUM>) is a concave surface, the e-liquid guide cotton (<NUM>) has a convex surface corresponding to the atomization surface, the convex surface of the e-liquid guide cotton (<NUM>) is in contact with a center of the atomization surface of the ultrasonic atomization sheet (<NUM>), and the curvature of the convex surface of the e-liquid guide cotton (<NUM>) is greater than the curvature of the atomization surface of the ultrasonic atomization sheet (<NUM>), such that a gap that connects an edge of the e-liquid guide cotton (<NUM>) and the center of the atomization surface of the ultrasonic atomization sheet (<NUM>) is formed between the convex surface of the e-liquid guide cotton and the atomization surface of the ultrasonic atomization sheet.