CN219982121U - Atomizer and ultrasonic atomization device - Google Patents

Abstract

The utility model discloses an atomizer and an ultrasonic atomization device, wherein the ultrasonic atomization device comprises an atomizer and is used for atomizing a liquid matrix into aerosol through ultrasonic vibration; a power supply assembly for providing an electrical drive for the atomizer; a housing that remains connected to the power assembly or is configured as part of the power assembly; the atomizer comprises an elastic buckle structure, a matching part is arranged on the shell, and the elastic buckle structure is in buckle connection with the matching part; wherein at least a portion of the resilient clip structure is configured to be depressed, depressing the resilient clip structure, the resilient clip structure being separated from the housing.

Description

Atomizer and ultrasonic atomization device

Technical Field

The embodiment of the utility model relates to the field of aerosol generating devices, in particular to an atomizer and an ultrasonic atomization device.

Background

The ultrasonic atomizing device atomizes the liquid matrix through the reciprocating vibration of the ultrasonic atomizing sheet inside the device so as to generate aerosol.

The ultrasonic atomization device comprises an atomizer and a power supply assembly, wherein the power supply assembly provides electric drive for the atomizer. Ultrasonic atomizing devices are commonly used as auxiliary medical devices, wherein the atomizer and the power supply assembly are generally configured as one unit, making maintenance and use of components inside the ultrasonic atomizing device inconvenient.

Disclosure of Invention

An embodiment of the present utility model provides an ultrasonic atomizing device including:

an atomizer for atomizing the liquid matrix into an aerosol by ultrasonic vibration;

a power supply assembly for providing an electrical drive for the atomizer;

a housing that remains connected to the power assembly or is configured as part of the power assembly;

the atomizer comprises an elastic buckle structure, a matching part is arranged on a shell of the power supply assembly, and the elastic buckle structure is in buckle connection with the matching part; wherein at least a portion of the resilient snap structure is configured to be depressible, depressing the resilient snap structure, the resilient snap structure being separated from the housing.

The atomizer is connected to the power supply assembly through the elastic buckle structure by being buckled with the shell, at least one part of the elastic buckle structure is configured to be pressed, the elastic buckle structure is pressed, and the elastic buckle structure is separated from the shell, so that the atomizer and the power supply assembly can be separated conveniently. Through separating atomizer and power supply module, be convenient for maintain and change the inside spare part of atomizer and power supply module. At the same time, by separating the atomizer from the power supply assembly, replenishment of the liquid matrix inside the atomizer is facilitated. Further, the atomizer and the power supply assembly are configured to be detachably connected in a buckling mode, so that the atomizer and the power supply assembly can be stored independently.

In some embodiments, the power supply assembly includes a receiving cavity having an opening through which at least a portion of the atomizer can be inserted into or removed from the receiving cavity, the at least a portion of the atomizer being retained inside the receiving cavity by the resilient snap structure.

In some embodiments, the elastic snap structure comprises an elastic arm comprising a first protrusion, the housing being provided with a first hole, the first protrusion being snapped into the first hole.

In some embodiments, the atomizer comprises a reservoir, and a space is provided between the resilient arm and the reservoir.

In some embodiments, pressing the first projection, the atomizer is configured to be movable along a side of the receiving cavity.

In some embodiments, the elastic snap structure comprises an elastic cover comprising a second protrusion, and the housing is provided with a second hole, and the second protrusion may be snapped into the second hole.

In some embodiments, pressing the second projection, the atomizer is configured to be movable along the other side of the receiving cavity.

In some embodiments, the elastic cap includes a mist outlet through which aerosol generated by the atomizer atomization escapes.

In some embodiments, the atomizer further comprises an ultrasonic atomizing assembly for atomizing the liquid matrix into an aerosol by vibration; the atomizer further comprises an open accommodating groove, the accommodating groove is used for accommodating the ultrasonic atomization assembly, and the elastic cover is used for sealing the open end in the accommodating groove.

In some embodiments, the power assembly further comprises a key, the second protrusion and the key being located on a same side of the housing.

In some embodiments, the elastic snap structure comprises an elastic arm and an elastic cover, which are respectively arranged at two sides of the atomizer.

In some embodiments, the atomizer comprises a reservoir for storing a liquid matrix and a reservoir cup detachably connected to an open end of the reservoir, the reservoir being adapted to be replaced to replenish the liquid matrix in the reservoir.

In some embodiments, the liquid storage cup is threadably connected to the liquid storage.

In some embodiments, the nebulizer further comprises a liquid level detector for detecting a volume of liquid matrix stored inside the reservoir.

An embodiment of the present utility model further provides a detachable fastening connection between an atomizer and a power supply assembly, where the atomizer includes an elastic fastening structure, and the elastic fastening structure is fastened and connected with a housing of the power supply assembly; at least a portion of the resilient snap structure is configured to be depressible, depressing the resilient snap structure, the resilient snap structure being separate from the housing of the power assembly.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a perspective view of an ultrasonic atomizing device according to an embodiment of the present utility model;

FIG. 2 is a perspective view of a nebulizer provided in an embodiment of the utility model;

FIG. 3 is an exploded view of a nebulizer provided in an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a nebulizer provided by an embodiment of the utility model;

fig. 5 is a perspective view of yet another view of an ultrasonic atomizing device provided by an embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating the operation of the pressing elastic buckle structure according to the embodiment of the present utility model;

FIG. 7 is a schematic diagram of an atomizer and power supply assembly separated according to an embodiment of the utility model;

FIG. 8 is a cross-sectional view of an ultrasonic atomizing device provided by an embodiment of the present disclosure;

reference numerals in the specific embodiments are as follows:

liquid storage cavity 110 of step surface 101 of first housing 10 of atomizer 100

Second receiving groove 14 of flange 112 of external thread 111 of liquid storage cup 11

The internal thread 121 of the first accommodating groove 12 is divided into a spacing region 122

Inlet 131 and outlet 132 of reservoir 13

The second protrusion 153 of the lid 15 is snapped into the mist outlet 151

Ultrasonic atomization assembly 30 piezoelectric ceramic plate 31 silica gel sleeve 32 electrode 33

First protruding portion 411 of elastic arm 41 of elastic buckle structure 40

Liquid level probe 61

Housing 20 receiving cavity 210 of power assembly 200

First hole 51 and second hole 52 of fitting portion 50

Third conductive spring pin 23 of conductive spring pin 22 of key 21

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

It should be noted that, in the embodiments of the present utility model, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship, movement situation, etc. between the components in a specific posture (as shown in the drawings), if the specific posture changes, the directional indicators correspondingly change, where the "connection" may be a direct connection or an indirect connection, and the "setting", "setting" may be a direct setting or an indirect setting.

Furthermore, the description of the utility model as it relates to "first," "second," etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

One embodiment of the present utility model provides an ultrasonic atomizing device, as shown in fig. 1, which includes an atomizer 100 and a power supply assembly 200, the power supply assembly 200 providing electric drive to the atomizer 100, the atomizer 100 being used to atomize a liquid substrate to generate aerosol by reciprocating vibration.

The ultrasonic atomizing device has different use values according to different liquid matrixes atomized by the atomizer. The ultrasonic atomizing device is used as an auxiliary medical device when a pharmaceutical preparation and an atomizing aid are contained in a liquid matrix, and as an inhalation apparatus for a flavor component when a flavor component and an atomizing aid are contained in a liquid matrix.

Fig. 2 shows a perspective view of a nebulizer 100 according to an embodiment of the utility model, fig. 3 shows an exploded view of the nebulizer 100 according to an embodiment of the utility model, and fig. 4 shows a cross-sectional view of the nebulizer 100 according to an embodiment of the utility model.

The atomizer 100 comprises a first housing 10 and a liquid storage cup 11 removably connected to one end of the first housing 10, wherein the connection between the liquid storage cup 11 and the first housing 10 can be configured as a snap connection, a magnetic connection or a screw connection, and the liquid storage cup 11 is replaced to supplement the liquid matrix in the atomizer 100.

In one example, an open first receiving groove 12 is provided at one end of the first housing 10, an internal thread 121 is provided on an inner wall of the first receiving groove 12, and an external thread 111 is provided on an outer wall of the liquid storage cup 11, and the external thread cooperates with the internal thread to connect the liquid storage cup 11 to one end of the first housing 10. Further, the internal thread on the inner wall of the first receiving groove 12 is set to be the size of the common thread, so that the common mineral water bottle can be connected to one end of the first housing 10, when the liquid storage cup 11 is configured as the common mineral water bottle, the atomizer 100 is used for atomizing water to generate water mist through ultrasonic vibration, and the ultrasonic atomization device can be used as a water supplementing instrument.

The liquid storage cup 11 is a cup-shaped structure with one end open, a flange 111 is arranged at the open end of the liquid storage cup 11, external threads 111 are arranged at the lower end of the flange 111, when the liquid storage cup 11 is connected to one end of the first shell 10, a part of the lower end of the flange 111 of the liquid storage cup 11 is accommodated in the first accommodating groove 12, a part of the upper end of the flange 111 of the liquid storage cup 11 is exposed out of the first accommodating groove 12, and the flange 111 of the liquid storage cup 11 is abutted against the top end face of the first shell 10.

As shown in fig. 4, the atomizer 100 further includes a liquid reservoir 13, and the liquid reservoir 13 and the first housing 10 may be integrally formed. One end of the liquid storage 13 extends to the bottom of the first accommodating groove 12, a first through hole is arranged at the bottom of the first accommodating groove 12, the first through hole is configured as a liquid inlet 131 of the liquid storage 13, and the liquid matrix in the liquid storage cup 11 flows into the first accommodating groove 12 and further flows into the inner cavity of the liquid storage 13 through the first accommodating groove 12. The inner cavity of the liquid storage device 13 and the inner cavity of the first containing groove 12 jointly define a liquid storage cavity 110, the inner cavity of the liquid storage cup 11 is longitudinally communicated with the liquid storage cavity 110, and the liquid matrix in the liquid storage cup 11 can flow to the liquid storage cavity

The atomizer 100 further includes a second accommodating groove 14, the second accommodating groove 14 is configured to accommodate the ultrasonic atomization assembly 30, the second accommodating groove 14 is formed by enclosing a portion of the first housing 10, one end of the second accommodating groove 14 is disposed with an opening, the other end of the liquid reservoir 13 extends to the bottom of the second accommodating groove 14, a second through hole is disposed at the bottom of the second accommodating groove 14, and the second through hole is configured as a liquid outlet 132 of the liquid reservoir 13.

In the compact ultrasonic atomizing device, the atomizer 100 is preferably configured as a vibrating mesh screen atomizer, the ultrasonic atomizing assembly 30 includes a piezoelectric ceramic plate 31 and a flexible silica gel sleeve 32 for assisting in fixing the piezoelectric ceramic plate 31, a densely-distributed micron-sized mesh area is provided on the piezoelectric ceramic plate 31, and the liquid matrix is made to pass through fine meshes by the vibration of the piezoelectric ceramic plate 31 to generate aerosol. The piezoelectric ceramic plate 31 is fixed in the inner cavity of the flexible silica gel sleeve 32, and the silica gel sleeve 32 is provided with mist outlet holes which are opposite to the mesh areas on the piezoelectric ceramic plate 31, so that the escape of aerosol is facilitated. The piezoelectric ceramic plate 31 is fixed inside the flexible silica gel sleeve 32, the flexible silica gel sleeve 32 is further accommodated inside the second accommodating groove 14, and the liquid matrix inside the liquid storage cavity 110 is provided to the ultrasonic atomization assembly 30 through the liquid outlet 132.

The atomizer 100 further comprises two electrodes 33, the two electrodes 33 being in communication with the piezoelectric ceramic plate 31 and an electrical connection on the power supply assembly 200. As shown in fig. 3, the two electrodes 33 are fixed on the first housing 10, the fixed positions of the two electrodes 31 are located at the bottom of the second receiving groove 41, and conductive pins are disposed on both sides of the piezoelectric ceramic sheet 31 and electrically connected to the two electrodes 33, respectively.

The atomizer 100 further includes a cover 15, the cover 15 being disposed at the open end of the second housing 14 to further support the ultrasonic atomizing assembly 30. The cover 15 includes a mist outlet 151, the mist outlet 151 is located at the center of the cover 15, the size of the mist outlet 151 is approximately the same as the size of the micropore area on the piezoelectric ceramic plate 31, and the aerosol atomized by the ultrasonic atomizing assembly 30 escapes through the mist outlet 151.

Two ends of the cover 15 are fixed on the first housing 10 through different fixing structures respectively, two buckles 152 are arranged at the first end of the cover 15, the two buckles 152 are respectively located at two sides of the cover 15, the first end of the cover 15 is fixedly connected to the first housing 10 through the two buckles 152, two through holes are formed in the second end of the cover 15, and the two through holes are respectively used for the two electrodes 33 to pass through.

With further reference to fig. 5 to 8, in an embodiment of the present utility model, a detachable ultrasonic atomizing device structure is further provided, fig. 5 is a perspective view showing a perspective view of an ultrasonic atomizing device according to an embodiment of the present utility model, fig. 6 is a schematic view showing an operation of an elastic snap structure 40 of a pressing atomizer according to an embodiment of the present utility model, fig. 7 is a schematic view showing an atomizer 100 according to an embodiment of the present utility model separated from a power supply assembly, and fig. 8 is a cross-sectional view showing an ultrasonic atomizing device according to an embodiment of the present utility model.

The ultrasonic atomizing device further comprises a housing 20, and a part of the housing 20 encloses a receiving chamber 210 forming an opening through which the atomizer 100 is placed into the interior of the receiving chamber 210. The first housing 10 of the atomizer 100 is provided with a stepped surface 101, and a portion located above the stepped surface 101 is exposed to the outside of the receiving chamber 210, and a portion located below the stepped surface 101 is accommodated to the outside of the receiving chamber 210.

The housing 20 may be a housing of the power supply unit 200, or the housing 20 may be a sleeve member, a part of which is sleeved outside the power supply unit 200 so as to be connected to the power supply unit 200, and the other part of which is connected to the atomizer 100 by snap-fit.

An elastic snap structure 40 is provided on the atomizer 100, and a mating portion 50 is provided on the housing 20, and the elastic snap structure 40 cooperates with the mating portion 50 for snap connection, so that the atomizer 100 can be held inside the receiving chamber 210. Wherein at least a portion of the resilient catch structure 40 is configured to be depressed, depressing the resilient catch structure 40, the resilient catch structure 40 is separated from the housing 20 such that the nebulizer 100 can be removed from the receiving cavity 210.

In some examples, the resilient snap structure 40 includes a resilient arm 41, the resilient arm 41 includes a first protrusion 411, a first hole 51 is provided on the housing 20 of the power supply assembly 200, and the first protrusion 411 may snap within the first hole 51. The first protrusion 411 is exposed through the first hole 51, and a user can directly press the first protrusion 411. The first protrusion 411 may be provided in a triangle, a circle, a square, or the like, thereby prompting the user that the first protrusion 411 is compressible.

A spacer 122 is provided between the elastic arm 41 and the main body portion of the atomizer 100, the spacer 122 being configured as a movable space of the elastic arm 41, the elastic arm 41 being bendable into the spacer 122 by pressing the first protrusion 411 on the elastic arm 41.

In one example, the elastic arm 41 is disposed at one side of the atomizer 100, the first protrusion 411 is pressed inward, the elastic arm 41 is bent inward, the first protrusion 411 on the elastic arm 41 is removed from the first hole 51, and the atomizer 100 is movable along one side of the receiving chamber 210.

In other alternative embodiments, the elastic arms 41 are disposed along the circumference of the atomizer 100, and the first protrusions 411 on the elastic arms 41 are pressed inward at the same time, so that the elastic arms 41 are bent inward of the receiving cavity 210, the first protrusions 411 are removed from the first holes 51, and thus the snap connection between the atomizer 100 and the power supply assembly 200 is released, and the atomizer 100 can be removed from the receiving cavity 210.

Further, the housing 20 is preferably made of a hard plastic material, and the elastic arm 41 is preferably made of a flexible silicone material, so as to improve the pressing feeling of the first protruding portion 411 and the deformability of the elastic arm 41.

In some examples, the resilient snap structure 40 comprises a resilient cap 15, i.e. the cap 15 provided on the atomizer 100 is made of a flexible silicone material. A second hole 52 is provided in the housing 20 of the power supply assembly 200, and the elastic cover 15 includes a second protrusion 153, and the second protrusion 153 may be snapped inside the second hole 52. The second protrusion 153 is exposed through the second hole 52, and a user can directly press the second protrusion 153. The second protrusion 153 may be provided in a triangle, a circle, or a square, etc., thereby prompting the user that the second protrusion 153 is compressible. As shown in fig. 1, the mist outlet 151 is located approximately at the center of the second projecting portion 153.

The second protrusion 153 is pressed toward the inside of the receiving cavity 210, the second protrusion 153 is recessed toward the inside of the receiving cavity 210, the second protrusion 15 is removed from the second hole 52, and thus the snap-fit connection between the atomizer 100 and the power supply assembly 200 is brought into contact, and the atomizer 100 is movable in the longitudinal direction of the receiving cavity 210.

In an embodiment of the present utility model, the elastic buckle structure 40 includes an elastic wall arm 41 and an elastic cover 15, where the elastic arm 41 and the elastic cover 15 are respectively disposed at two sides of the atomizer 100, and the first protrusion 411 on the elastic arm 41 is engaged with the first hole 51, so that one side of the atomizer 100 is stably maintained in the interior of the receiving cavity 210, and the second protrusion 153 on the elastic cover 15 is engaged with the second hole 52, so that the other side of the atomizer 100 is stably maintained in the interior of the receiving cavity 210.

The first protrusion 411 of the elastic arm 41 and the second protrusion 153 of the elastic cover 15 are disposed opposite to each other, and a user can simultaneously press the first protrusion 411 and the second protrusion 153, so that the atomizer 100 can move along the longitudinal direction of the receiving chamber 210.

Through the operation, the atomizer 100 and the power supply assembly 200 can be disconnected, so that the liquid storage cup 11 on the atomizer 100 or the ultrasonic atomization assembly 30 inside the atomizer 100 can be replaced conveniently.

Two conductive pins 22, a first conductive pin and a second conductive pin, are also disposed at intervals at the bottom of the receiving cavity 210 of the power supply assembly 200. When the atomizer 100 is accommodated in the receiving cavity 210, the two electrodes 33 on the atomizer 100 are respectively connected with the two conductive pins 22 on the power supply assembly 200.

The power supply assembly 200 further comprises a battery and a control board, wherein electronic components are further welded on the control board or a charging board is connected with the control board, and the working mode of the ultrasonic atomization device is controlled through the control components on the control board.

The power supply assembly 200 further includes a key 21, the key 21 being configured to be actuated by pressure sensing, the key 21 being connected to a control board inside the power supply assembly 200, and the ultrasonic atomizing device being activated by pressing or touching the key 21.

The key 21 and the second protrusion 153 of the elastic cover 15 are disposed on the same side of the housing 20, so as to facilitate the user to operate the second protrusion 153 and the key 21.

In an embodiment of the present utility model, an intelligent liquid level detection module is further disposed inside the ultrasonic atomizing device, specifically, a liquid level detector 61 is disposed inside the atomizer 100, one end of the liquid level detector 61 extends into the liquid storage cavity 110, and the other end of the liquid level detector 61 is configured as a conductive terminal. A third conductive pin 23 is disposed at the bottom of the receiving cavity 210 of the power supply assembly 200, and when the atomizer 100 is accommodated in the receiving cavity 210, the conductive terminal of the liquid level detector 61 is electrically connected to the third conductive pin 23. The third conductive pins 23 are further connected to a control board. When the liquid level inside the liquid storage cavity 110 is higher than the detection height of the liquid level detector 61, the liquid level detector 61 is further communicated with the piezoelectric ceramic plate 31 through the liquid matrix, so that the piezoelectric ceramic plate 31 is electrically communicated with the control board inside the power supply assembly 200, and the power supply assembly 200 provides electric drive for the atomizer 100. When the liquid level inside the liquid storage cavity 110 is lower than the detection level of the liquid level detector 61, the liquid level detector 61 cannot be connected with the piezoelectric ceramic plate 31 through the liquid matrix, so that the piezoelectric ceramic plate 31 is electrically disconnected from the control board inside the power supply assembly 200, and the power supply assembly 200 cannot provide electric drive for the atomizer 100. By the above-mentioned liquid level monitoring mode, the ultrasonic atomizing assembly 30 is effectively prevented from starting to operate under the condition of insufficient supply of the liquid matrix by the atomizer 100.

It should be noted that the description of the utility model and the accompanying drawings show preferred embodiments of the utility model, but are not limited to the embodiments described in the description, and further, that modifications or variations can be made by a person skilled in the art from the above description, and all such modifications and variations are intended to fall within the scope of the appended claims.

Claims (15)

1. An ultrasonic atomizing device, comprising:

an atomizer for atomizing the liquid matrix into an aerosol by ultrasonic vibration;

a power supply assembly for providing an electrical drive for the atomizer;

a housing that remains connected to the power assembly or is configured as part of the power assembly;

the atomizer comprises an elastic buckle structure, a matching part is arranged on the shell, and the elastic buckle structure is in buckle connection with the matching part; wherein at least a portion of the resilient snap structure is configured to be depressible, depressing the resilient snap structure, the resilient snap structure being separated from the housing.

2. The ultrasonic atomizing device of claim 1, wherein the power supply assembly includes a receiving cavity having an opening through which at least a portion of the atomizer can be inserted into or removed from the receiving cavity, the at least a portion of the atomizer being retained within the interior of the receiving cavity by the resilient snap fit structure.

3. The ultrasonic atomizing device of claim 2, wherein the resilient snap structure comprises a resilient arm including a first projection, the housing having a first aperture disposed therein, the first projection snap within the first aperture.

4. An ultrasonic atomizing device according to claim 3, wherein the atomizer comprises a reservoir, and a space is provided between the resilient arm and the reservoir.

5. An ultrasonic atomizing device according to claim 3, wherein pressing the first projection, the atomizer is configured to be movable along one side of the receiving chamber.

6. The ultrasonic atomizing device of claim 2, wherein the resilient snap feature comprises a resilient cover including a second projection, the housing having a second aperture disposed therein, the second projection being snap-engageable within the second aperture.

7. The ultrasonic atomizing device of claim 6, wherein pressing the second projection, the atomizer is configured to be movable along the other side of the receiving cavity.

8. The ultrasonic atomizing device of claim 6, wherein the elastic cover includes a mist outlet through which aerosol generated by atomization of the atomizer escapes.

9. The ultrasonic atomizing device of claim 6, wherein the atomizer further comprises an ultrasonic atomizing assembly for atomizing the liquid matrix into an aerosol by vibration; the atomizer further comprises an open accommodating groove, the accommodating groove is used for accommodating the ultrasonic atomization assembly, and the elastic cover is used for sealing the open end of the accommodating groove.

10. The ultrasonic atomizing device of claim 6, wherein the power assembly further comprises a key, the second projection and the key being located on a same side of the housing.

11. The ultrasonic atomizing device of claim 1, wherein the resilient snap structure comprises a resilient arm and a resilient cover, the resilient arm and the resilient cover being disposed on opposite sides of the atomizer, respectively.

12. The ultrasonic atomizing device of claim 1, wherein the atomizer further comprises a reservoir and a reservoir cup detachably connected to an open end of the reservoir, the reservoir for storing a liquid matrix, the reservoir being replenished with liquid matrix by replacement of the reservoir cup.

13. The ultrasonic atomizing device of claim 12, wherein the reservoir cup is threadably connected to the reservoir.

14. The ultrasonic atomizing device of claim 12, wherein the atomizer further comprises a liquid level detector for detecting a volume of liquid matrix stored within the interior of the reservoir.

15. The atomizer is detachably connected with the power supply assembly through a buckle, and is characterized by comprising an elastic buckle structure, wherein the elastic buckle structure is connected with a shell of the power supply assembly through a buckle; at least a portion of the resilient snap structure is configured to be depressible, depressing the resilient snap structure, the resilient snap structure being separate from the housing of the power assembly.