WO2007018177A1

WO2007018177A1 - Ultrasonic atomizer

Info

Publication number: WO2007018177A1
Application number: PCT/JP2006/315597
Authority: WO
Inventors: Tetsuya Saitoh; Yasuhiko Nomura
Original assignee: Nippon Mmi Technology Inc.
Priority date: 2005-08-05
Filing date: 2006-08-07
Publication date: 2007-02-15
Also published as: JP2007061815A

Abstract

An ultrasonic atomizer (1) comprising a columnar absorber (5) taking a liquid (7) therein by immersing it in the liquid, a vibrating unit (4) for generating vibration, and a propagation part (41) having a flat vibration propagation end face (42) and propagating the vibration generated by an ultrasonic vibrator to the absorber (5). The atomizer is characterized in that the propagation part (41) is brought into contact with the side face of the absorber (5) so that there is an area not in contact with the absorber (5) in the vibration propagation end face (42). As a result, the ultrasonic atomizer with high atomization efficiency can be provided according to this invention.

Description

Specification

Ultrasonic atomizer

Technical field

[0001] The present invention relates to a technique for atomizing a liquid by ultrasonic vibration.

Background art

[0002] Liquid filled in containers such as medicines and fragrances is sucked up using an absorption material made of felt or a bundle of predetermined fibers using a capillary phenomenon, and the vibration surface of an ultrasonic vibrator made of a piezoelectric element or the like is absorbed by the material. There is a technique in which the liquid absorbed by the absorbent material is atomized (see, for example, Patent Document 1). As one application example of this technology, a liquid fragrance such as a so-called essential oil is released into the air to cause a user to inhale various fragrances. According to this method, it is not necessary to bring the vibrator into direct contact with the liquid! Therefore, it is possible to reduce the size of the apparatus, and it is not necessary to heat the liquid to vaporize, so a fire or the like occurs. There is also the advantage of not worrying.

Patent Document 1: Japanese Unexamined Patent Publication No. 2003-181347

Disclosure of the invention

Problems to be solved by the invention

[0003] When atomizing by applying vibration to the absorbing material that has absorbed the liquid while applying force, a limited region where the vibration by the ultrasonic transducer propagates (usually, the vibration surface and the absorbing material come into contact with each other) There is a problem that the ability to atomize the liquid (hereinafter referred to as atomization efficiency) is low because force atomization is not performed. Of course, if the absorbent material is made larger in size, the contact area can be increased by increasing the size of the ultrasonic transducer, or if the frequency of the transducer is increased, the atomization efficiency can be improved. However, there are problems that the size of each device increases and the size (particle size) of the atomized particles inevitably decreases.

Means for solving the problem

[0004] The present invention has been made in view of the above-described background, and realizes high atomization efficiency without enlarging the apparatus and without restricting the particle diameter of the atomized particles. An atomizing device that can be used is provided. [0005] The present invention includes a columnar absorber that takes the liquid into the liquid by immersing the liquid in the liquid, a vibration generating portion that generates vibration, and a flat vibration propagation surface, and the vibration generation A propagation part that propagates the vibration generated in the part to the absorbent material, and the propagation part and the side surface of the absorbent material are in contact with each other so that there is a region that does not contact the absorbent material on the vibration propagation surface. Provided is an ultrasonic atomizer characterized by being in contact with each other.

[0006] Preferably, according to an aspect, the shape of the vibration propagation surface is a circle, and the position of the upper end surface of the absorber on the vibration propagation surface overlaps the center of the vibration propagation surface. The propagation part and the side surface of the absorbent material are brought into contact with each other.

In another preferred embodiment, the propagation part and the absorbent are brought into contact with each other so that an angle formed by the vibration propagation surface and the upper end surface of the absorbent has a predetermined value. The predetermined value is 45 °, for example. The side surface is a concept including the edge of the upper end surface of the absorbent (intersection line between the upper end surface and the side surface).

[0008] In another preferred embodiment, the vibration generating portion and the propagation portion are fixed by an adhesive.

[0009] In another preferred embodiment, the ultrasonic atomizer further includes a vibrator holder that engages with the propagation part such that the vibration generation part and the propagation part are pressure-bonded. Have.

[0010] In still another preferred aspect, the ultrasonic atomizer further includes a screw and a nut for fixing the propagation part and the vibration generating part.

[0011] In still another preferred embodiment, the propagation part is further provided with a screw groove, and further includes a screwing member that fixes the propagation part and the vibration generating part by engaging with the screw groove.

[0012] In another aspect, the present invention is an ultrasonic atomization device including a housing head and a container portion, and the housing head takes a columnar second shape to take in the liquid when contacting the liquid. A vibration generating part that generates vibration, and a propagation part that has a flat vibration propagation surface and propagates the vibration generated in the vibration generating part to the absorbent, The propagation part and the side surface of the absorbent material are brought into contact with each other so that there is a region that does not come into contact with the absorbent material on the vibration propagation surface, and the container part includes a container for storing a liquid, and the container. When fixed and in contact with a liquid, the liquid is put inside A columnar second absorbent material to be taken in, wherein the housing head and the container portion are engaged with each other in a state where the first absorbent is held by the second absorbent. An ultrasonic atomizer is provided.

Brief Description of Drawings

1 is a cross-sectional view of an ultrasonic atomizer 1. FIG.

FIG. 2 is a diagram for explaining the contact relationship between the propagation part 41 and the absorbent material 5.

FIG. 3 is a diagram for explaining an example of an installation mode of the vibration unit 10.

FIG. 4 is a diagram for explaining an example of an installation mode of the vibration unit 10.

FIG. 5 is a diagram for explaining another example of the installation mode.

FIG. 6 (a) is a diagram illustrating an aspect in which the vibration generating unit 110 and the propagation unit 100 are joined.

FIG. 6 (b) is a diagram illustrating an aspect in which the vibration generating unit 110 and the propagation unit 100 are joined.

[FIG. 7 (a)] FIG. 7A is a diagram illustrating another mode of joining the vibration generating unit 110 and the propagation unit 100 to each other.

FIG. 7 (b) is a diagram showing another mode of joining vibration generating unit 110 and propagation unit 100.

FIG. 8 is a diagram showing another mode of joining vibration generating unit 110 and propagation unit 100.

FIG. 9 is a cross-sectional view of the joint between the housing head 20 and the container part 30.

FIG. 10 is a cross-sectional view of the housing head 20.

Explanation of symbols

[0014] 1 · 'Ultrasonic atomizer, 2 ·' Nosing section, 3, 30 · 'Container section, 4, 10 ·' Vibration unit, 5 · · · Absorber, 6 · · · Substrate, 7 ... 'Liquid, 20 ...' Nosing head, 21 ... 'Head cover, 22 ... Screw, 23 ... Head body, 31 ... Bottle, 32 ... Fiber rod, 33 Inner plug, 40, 110 ... 'Vibration generating part, 41, 100 ...' Propagating part, 42, 104 ... 'Vibration propagation end face, 50 ... Upper end face, 101 ... Tip part, 102 ··································································· Power supply line or 130 , 1 90 ··· Insulating sheet, 200 ··· Oscillator holder, 210 ··· Screw, 220 ··· Nut, 230 ··· Screw fixing member, 240 ··· terminal.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a cross-sectional view of an ultrasonic atomizer 1 according to an embodiment of the present invention. As shown in the figure In addition, the ultrasonic atomizer 1 is roughly composed of a nozzle part 2 made of, for example, plastic resin, and a container part 3 made of, for example, a glass bottle.

The substrate 6 is provided in the housing 2 and the vibration unit 4 is provided on the substrate 6. The vibration unit 4 efficiently uses a cylindrical vibration generating unit 40 including a piezoelectric element that operates based on a control signal supplied from the substrate, and ultrasonic vibration (for example, 40 kHz) generated by the vibration generating unit 40. It consists of a propagation part 41 having a horn shape for good propagation. The propagation unit 41 propagates vibration to other members through mechanical contact via the vibration propagation end face 42. The direction of vibration is preferably the y-y direction in the figure. A control circuit for controlling the vibration unit 4 such as a CPU, a storage element such as a RAM or ROM storing control information, a power supply circuit, a switch circuit, etc. (all not shown) are arranged on the substrate 6. Is done. The vibration unit 4 is electrically connected to the substrate 6. A through hole is formed at the center of the vibration unit 4, and the cylindrical absorbent member 5 is inserted almost vertically through the hole. The absorbent material 5 is a bundle of felt and various fibers, and has a function of absorbing the liquid when it comes into contact with the liquid on the surface and transporting it upward by capillary action or the like. The absorber 5 is brought into contact with the propagation part 41 with a predetermined pressing force through the vibration propagation end face 42 at the upper part of the side surface, while the lower part reaches the bottom of the container part 3 filled with the liquid 7. To be fixed. As a result, the liquid 7 in the container 3 is sucked up and reaches the vicinity of the upper end surface of the absorbent 5. When the force of ultrasonic vibration is applied via the vibration propagation end face 42, the molecules in the liquid 7 that have reached the vicinity of the upper end face of the absorbent 5 will overcome the intermolecular force (surface tension) and become fine particles (typical Is about a few microns) and passes through a hole (not shown; for example, just above the absorbent 5) provided in the housing part 2 and jumps out (sprays) into the air. The housing part 2 and the container part 3 may be formed as a single unit, or may be formed separately by using screws or the like.

Next, with reference to FIG. 2, the contact relationship between the propagation part 41 and the absorbent material 5, which is a feature of the present invention, will be described. FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1 and is an enlarged view of the vibration propagation end face 42. In the figure, m represents the diameter of the absorber, and d represents the diameter of the vibration propagation end face 42. Although d = m is shown in the figure, the values of d and m are not limited to this. As shown in the figure, the upper end surface 50 of the absorbent 5 is in the horizontal direction (y-y direction) and It is fixed at a position crossing the center C of the motion propagation end face 42. In this manner, the upper end surface 50 of the absorbent material 5 is arranged so that the region of the vibration propagation end face 42 does not entirely contact the absorbent material 5, and the center C of the vibration propagation end face 42 is overlapped. In other words, on the vibration propagation end face 42, a region 42B that contacts the absorber 5 and a region 42A that does not contact are formed, and the boundary is located at a position passing through the center C. In this manner, the contact position of the absorber 5 is shifted by 1 Z2d in the vertical direction in the figure with respect to the vibration propagation end face 42 in the vertical direction (X-X direction in the figure). As shown in the figure, the areas 42A and 42B are equal when d = m and when d <m. In the case of d> m, the area of the region 42A is larger than 42B, but there is no change in the arrangement so that the upper end surface 50 of the absorber 5 overlaps the center C of the vibration propagation end surface 42.

[0017] The inventor of the present application has conducted experiments by changing the position of the upper end surface 50 of the absorbent material 5, and as a result, it has been clarified that the atomization efficiency is improved by shifting the contact position of the absorbent material 5. Furthermore, regardless of the value of the diameter m of the absorbent material, the material of the liquid 7 or the absorbent material 5, the frequency generated, the room temperature, and other factors, the position of the upper end surface 50 of the absorbent material 5 is the center C of the vibration propagation end face 42. The results show that the atomization efficiency is highest when they are in overlapping positions. Furthermore, it was found that the direction of the sprayed particles is the highest in the case of this positional relationship. It was also confirmed that the time to atomization was the shortest. It was also clarified that atomization occurs most stably in this position.

[0018] Thus, according to the ultrasonic atomizer 1 according to the present invention, the atomization efficiency is improved. Furthermore, the time until atomization occurs is shortened. In other words, if the switch of the ultrasonic atomizer 1 is turned on and the reaction of force is fast! /, For example, the power supplied to the vibration unit 4 is repeatedly turned ON / OFF at intervals of 3 seconds. By controlling, it is possible to perform fine control such as intermittently generating aroma. Further, when the configuration of the contact position of the present invention is adopted, the particles are sprayed upward, so that the particles can be efficiently diffused in the room without being biased. This also has the effect of preventing the atomized particles from becoming liquid again and collecting on the floor, desk, etc., as compared to, for example, spraying to the side. In addition, in order to achieve high atomization efficiency, it is not necessary to increase the frequency of the vibration unit 4 or to increase the size of the absorber 5 or the vibration propagation end face 42. Can be planned.

Subsequently, an ultrasonic atomizer according to another embodiment of the present invention will be described. The ultrasonic atomizing apparatus according to the present embodiment is configured to include the housing part 2, the container part 3, the absorbent 5 and the substrate 6 of the ultrasonic atomizing apparatus 1. The difference from the first embodiment is that the vibration unit 10 is used instead of and the vibration unit 10 is installed. Hereinafter, this feature will be described in detail. Note that members that are the same in Example 1 and Example 2 are given the same reference numerals.

[0020] FIGS. 3 and 4 are views showing the vibration unit 10 and its installation mode (including the positional relationship with the absorbent 5). As shown in FIG. 3, the vibration unit 10 includes a vibration generation unit 110 made of a piezoelectric element and the like, and a propagation unit 100 for propagating the generated vibration to the absorbent 5. Propagation unit 100 is provided between horn-shaped front end 101 having vibration propagation end surface 104, rear end 102 in mechanical contact with vibration generation unit 110, and front end 101 and rear end 102. Three site forces in the recess 103 that come into contact with the unit holder 140 are also configured. The vibration generating unit 110 has a power supply line 130 attached thereto via a power supply unit 120 (for example, solder), and power is supplied from a power source (not shown) provided on the substrate 6 or the like. It is summer. Moreover, the vibration generating part 110 and the rear end part 102 are fixed by, for example, an adhesive (not shown) formed to have a predetermined thickness.

As can be seen from the figure, in this embodiment, the vibration unit 10 is fixed so as to form a predetermined angle with the absorbent 5. FIG. 3 shows an example in which the vibration propagation end face 104 is fixed so as to form an angle of 45 ° with respect to the upper end face 50 of the absorbent 5. At this time, the vibration propagation end face 104 and the absorbent 5 are ideally in contact with each other at a point P on the upper end face 50 (that is, the corner of the absorbent 5 having a cylindrical shape). As in this embodiment, the vibration propagation end face 104 and the upper end face 50 are brought into contact with each other at a predetermined angle, so that the atomization is less than that in the case where the contact angle is 90 ° (0 °). The inventors have shown that the amount and stability are increased.

[0022] As shown in the figure, in the present embodiment, a support member 150 is provided so as to cover a part of the periphery of the absorbent material 5. As a result, the force in the y-y direction applied to the absorbent 5 does not damage the absorbent 5 and the pressing force from the tip 101 is kept constant. The vibrational state applied to the absorbent 5 is stabilized, and the amount of neutralization from the absorbent 5 can be kept constant. It should be noted that a predetermined interval may be provided between the support member 150 and the absorbent 5 in the non-vibrating state, or may be in contact therewith.

FIG. 4 is a view of the vibration unit 10 and related components as viewed from the x-x direction. As shown in FIGS. 3 and 4, the vibration unit 10 is held in the recess 103 by a unit holder 140 provided on the substrate 6 (not shown). The substrate 6 is provided with a 160 power supply substrate connected to a power source (not shown), and is connected to the feeder line 130. The power supply method is not limited to this. For example, the power supply line 130 may be routed to the outside of the housing portion 2 and connected to an external power source. Moreover, the method of fixing the unit holder 140 to the board | substrate 6 is arbitrary, For example, a screw can be used.

[0024] As described above, ideally, the absorbent 5 and the vibration propagation end face 104 are configured to contact at one point P. However, the absorbent 5 has a finite elastic modulus and a constant contact pressure. Therefore, the contact area is not strictly a single point, but may be grasped as having a binary spread. However, even in this case, the contact angle described above is maintained at a predetermined angle (45 °). The contact pressure can be appropriately set according to parameters such as the physical properties such as the viscosity of the liquid 7 to be atomized and the frequency of vibration generated by the vibration generating unit 110. Further, the fine adjustment of the contact position P may be performed, for example, by visual confirmation by the user. 3 and 4, the contact position P is on the upper end surface 50. However, as shown in FIG. 5, it may be set at a position separated from the upper end surface 50 by a minute distance Δ. In this case, the contact position P is on the side surface of the absorbent 5.

In the embodiment described with reference to FIGS. 3 and 4, the vibration generating part 110 and the rear end part 102 are fixed by an adhesive, but the method for fixing the vibration generating part 110 and the rear end part 102 is as follows. Not limited to this. FIGS. 6 (a) and 6 (b) are diagrams showing another example of a method for fixing the vibration generating unit 110 and the rear end 102. FIG. FIG. 6A is a cross-sectional view of the vibration unit 10, and FIG. 6B is an external perspective view of the vibration unit 10. As shown in FIG. 6 (a), instead of providing an adhesive layer between 102 and 110, the entire surface of the vibration generating part 110 is covered with an insulating sheet 190 and the outside thereof is crimped by the vibrator holder 200. . By fitting the vibrator holder 200 with the recess 103, the vibration generating unit 110 and the rear end 102 of the propagation unit 100 are fixed with a predetermined pressure. vibration The child holder 200 is made of, for example, a metal material such as SUS, and is fitted by sliding from the X—x ′ direction in FIG. Note that the insulating sheet 190 and the vibrator holder 200 are provided with through holes through which the feeders 130 are passed through the central portions thereof.

[0026] Still another example of a method for fixing the vibration generating unit 110 and the rear end 102 will be described with reference to FIGS. 7 (a) and 7 (b). FIG. 7A is a cross-sectional view of the vibration unit 10. As shown in FIG. 7 (a), in this embodiment, the vibration generating portion 110 and the rear end portion 102 are fixed using screws 210 and nuts 220. Specifically, as can be seen from FIG. 7 (b) showing the vibration unit 10 as viewed from the z′-z direction, a hole for penetrating the nut is formed in the central portion of the vibration generating unit 110. Screw holes are provided in the corresponding positions on 102, respectively. Between the vibration generating unit 110 and the nut 210, an insulating sheet 190 and a terminal 240 for supplying power to the vibration generating unit 110 are provided. The terminal 240 protrudes from the side surface of the vibration generating unit 110.

Further, as shown in FIG. 8, the thread groove S is cut in the rear end portion 102, and the vibration generating portion 110 is connected to the rear end portion 102 by a screwing member 230 engaged with the screw groove S. You may make it crimp. When the screwing member 230 is a metal, an insulating sheet 190 may be appropriately provided on the contact surface between the screwing member 230 and the vibration generating part.

The ultrasonic atomizer according to the present embodiment is characterized in that a housing head 20 and a container portion 30 are used in place of the housing portion 2 and the container portion 3 disclosed in the first embodiment. Hereinafter, these characteristic portions will be described in detail. The same components as those disclosed in Examples 1 and 2 are denoted by the same reference numerals. FIG. 9 is a diagram showing a cross-sectional structure of the housing head 20. As shown in the figure, the housing head 20 includes a head cover 21 provided with a hole for discharging the atomized gas to the outside, a head main body 23, and a screw 22 for fixing both. Power is also constructed. Instead of using the screw 22, the head cover 21 and the head main body 23 may be joined using an adhesive, or both may be integrally formed! /. The head main body 23 is formed of plastic resin or the like, and is provided with a unit holder or the like for mounting the substrate 6 (not shown) and the vibration unit 10 described in the above embodiment. In addition, about the attachment method of a vibration unit etc., since the method described in Example 1 or Example 2 can be used, description is abbreviate | omitted in a present Example. What The lid body 23 is further provided with a screw N1 for screwing the container 30. An absorbent 5 is also provided. The joining method of the absorbent 5 and the head body 23 is arbitrary, but as will be described later, the engaging method is strong against the force from below (container 30 side) when engaging with the container 30. Is preferably used. The absorbent 5 has a tip T in a preferred embodiment. As is clear from the figure, Example 3 is different from the above example in that the absorbent 5 does not directly contact the liquid 7 stored in the container.

FIG. 10 shows a cross-sectional view of the state in which the housing head 20 and the container part 30 are engaged. As shown in the figure, the container part 30 is composed of a bottle 31 made of glass or the like, a liquid 7 sealed in the bottle 31, an inner plug 33 made of rubber or the like, and a fiber rod 32. A screw N2 is cut outside the upper part of the bottle 31, and the udging head 20 and the container part 30 are fixed by this screw groove. The fiber rod 32 and the bottle 31 are stopped through the inner plug 33. The inner plug 33 is provided with an air hole (not shown).

When the housing head 20 and the container part 30 are screwed together, the absorbent 5 is pressed against the fiber rod 3 2. Similar to the absorbent 5, the fiber rod 32 is made of a material having a function capable of absorbing the liquid when it comes into contact with the surface and transporting it to the upper part by capillary action or the like. Further, the fiber rod 32 has a cylindrical shape whose diameter is larger than that of the absorbent 5, and the lower end of the fiber rod 32 reaches a position where it is immersed in the liquid 7 (for example, up to the bottom of the bottle 31). The liquid 7 sucked up at the lower part of the fiber rod 32 is carried to the upper part of the fiber tip 32. The liquid 7 that has reached here is further transported upward by the absorbent 5. The fiber rod 32 is preferably formed of a relatively soft material (for example, compared with the absorbent 5) such as plastic resin for the convenience of being held together with the absorbent 5.

[0030] Thus, according to the present embodiment, the housing head 20 provided with the vibration unit and the container part 30 in which the liquid 7 is enclosed are formed as separate bodies and fixed by screws, so that both Manufactured and transported separately 'to be easy to sell. For example, in FIG. 10, if a plastic cover (not shown) having a screw structure that engages with N2 is attached instead of the housing head 20, it can be transported and sold as a single bottle containing a fragrant liquid. Since the container part 30 is provided with a stopper, there will be no serious obstacles when dealing as a single bottle, such as liquid 7 spilling out during transportation. In addition, according to the configuration of the present embodiment, the user can obtain the function of the ultrasonic atomizer only by screwing the separately purchased housing head 20 to the purchased container 30. In other words, there is no need to refill the fragrance liquid with your own hands or purchase a vibration unit for each fragrance type. No, if you purchase one Uzing head 20, you can easily generate various types of fragrances by changing the container 30 attached.

In addition, according to the present embodiment, the absorbent (introduction core) attached to the housing head 20 does not need to be in direct contact with the liquid in the container portion 31, and thus the length thereof can be shortened. Since the housing head 20 can be made compact, it is easy to sell and transport the housing head alone. Further, since it is not necessary to expose the absorbent 5 to the lower side (that is, outside) of the housing head 20, there is no possibility that the absorbent 5 is broken or damaged during transportation.

The present invention can be variously modified with respect to the above-described embodiments. An example is described below. There are no restrictions on the type of liquid to be atomized 7 or the application of the ultrasonic atomizer 1. For example, various essential oils used for aromatherapy can be used as the liquid 7, and alcohol such as ethanol can be used as the liquid 7 as a medical device. As for the spray amount and spray time (time interval), suitable values can be selected according to the type of liquid, the characteristics of the absorbent, or the use of the ultrasonic atomizer 1. Further, the shapes of the propagation parts 41 and 100 (horn) are also arbitrary. Note that the cross-sectional shape of the vibration propagation end faces 42 and 104 does not necessarily have to be a circle. In the first embodiment, the vibration absorbing end face 42 is not necessarily brought into contact with the absorbent material 5. It is only necessary that the end face 50 be in contact with the vibration propagation end face 42. In the first embodiment, as a preferable contact position, the upper end surface 50 of the absorbent material 5 is overlapped with the center C of the vibration propagation end surface 42. It is also possible to adopt an arrangement position that overlaps the center of gravity of the vibration propagation end face 42. Further, the shape of the absorbent material 5 may be a columnar or other columnar shape in addition to a cylinder.

In Example 2, the contact angle is further 45 °. It does not have to be 45 °. For example, although the atomization efficiency is improved even at 30 ° and 60 °, the inventor of the present application shows that the atomization efficiency and the atomization stability are most improved near 45 ° regardless of the viscosity and frequency of the liquid. Revealed by an experiment conducted by the group.

Needless to say, the constituent elements described in each embodiment may be used in combination. For example, in the third embodiment, the force using the vibration unit 10 that contacts the housing head 20 at an angle of 45 ° according to the second embodiment. The vibration unit 4 according to the first embodiment (contact angle) is applied to the housing head 20. May be configured with an ultrasonic atomizer.

Claims

The scope of the claims

[1] A columnar absorbent material that takes the liquid into the liquid by immersing it in the liquid, a vibration generating unit that generates vibration,

A propagation part that has a flat vibration propagation surface, and that propagates the vibration generated in the vibration generation part to the absorber;

With

The propagation part and the side surface of the absorbent material are in contact with each other so that there is a region that does not contact the absorbent material on the vibration propagation surface.

An ultrasonic atomizer characterized by the above.

[2] The vibration propagation surface has a circular shape,

The propagation part and the side surface of the absorbent material are in contact with each other so that the position of the upper end surface of the absorbent material on the vibration propagation surface overlaps the center of the vibration propagation surface.

The ultrasonic atomizer according to claim 1, wherein:

[3] The propagation part and the absorbent are brought into contact with each other so that an angle formed by the vibration propagation surface and the upper end surface of the absorbent has a predetermined value.

The ultrasonic atomizer according to claim 1, wherein:

[4] The predetermined value is 45 °

The ultrasonic atomizer according to claim 3.

[5] The propagation part contacts at an edge of the upper end surface of the absorbent.

The ultrasonic atomizing device according to claim 3 or 4, wherein:

[6] The vibration generating part and the propagation part are fixed by an adhesive.

The ultrasonic atomizer according to claim 1, wherein:

[7] It further includes a resonator holder that engages with the propagation part so that the vibration generation part and the propagation part are pressure-bonded.

The ultrasonic atomizer according to claim 1, wherein:

8. The ultrasonic atomizer according to claim 1, further comprising a screw and a nut for fixing the propagation part and the vibration generating part.

[9] The propagation part is threaded, A screw fixing member for fixing the propagation portion and the vibration generating portion by engaging with the screw groove;

The ultrasonic atomizer according to claim 1, wherein:

No., an ultrasonic atomizing device composed of a Uzing head and a container part,

The housing head is

A columnar first absorber that takes in the liquid into contact with the liquid, a vibration generating section that generates vibration,

A propagation portion having a flat vibration propagation surface that propagates the vibration generated in the vibration generation portion to the absorbent material;

The propagation part and the side surface of the absorbent material are in contact with each other so that there is a region that does not contact the absorbent material on the vibration propagation surface,

The container part is

A container for storing liquid;

A columnar second that is fixed to the container and takes in the liquid when it comes into contact with the liquid.

With 2 absorbent materials,

In a state where the first absorbent is held by the second absorbent, the housing head and the container portion engage with each other.

An ultrasonic atomizer characterized by the above.