JPS6168060A - Horn vibrator of ultrasonic atomizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a horn vibrating body of an ultrasonic atomizer used for inhalation of medicinal solutions into the upper respiratory tract, humidification, and the like.

(b) Conventional technology The ultrasonic atomizer has a large diameter part a and a small diameter part as shown in FIG. A horn e is provided with a circular diaphragm d integrally formed as an atomizing part in the small diameter part, and a cotton swab (or water absorption band) is used to collect the liquid stored in a bottle (not shown) on the circular diaphragm d of the horn e. The part guided by f, the ultrasonic transducer C by the oscillation circuit g
There is one that drives the horn e, magnifies its vibrational energy with the main body of the horn e, transmits it to the diaphragm d, and atomizes the liquid on the surface of the diaphragm d. Note that h is a collar for supporting the horn e on a main body case (not shown).

(c) Problems that the invention attempts to solve In the conventional ultrasonic atomizer described above, the atomizing section is a circular diaphragm, and the oscillation frequency of the oscillation circuit and the resonance frequency of the diaphragm are matched. Atomization was properly performed. Therefore, if the liquid supply status from the cotton swab, that is, the load status changes,
The resonant frequency of the diaphragm changes, the atomization effect is weakened, water droplets that are not atomized adhere to the atomization surface, and overload occurs.
This required extra power to drive the oscillation circuit, which shortened the battery consumption time. Furthermore, if liquid was supplied without being quantified, water droplets would accumulate on the atomizing surface of the horn, resulting in supercharged water, which sometimes could not be atomized by the power of the equipment and had to be wiped off.

Therefore, in order to achieve proper atomization, it was necessary to reduce the load and make contact, and to quantify and supply the liquid. Because of this, the horn is frequently attached and detached from the atomizing part of the horn, and the connection to the atomizing part of the horn differs slightly each time it is installed, making it difficult to satisfy the above conditions in practice. .

In view of the above, it is an object of the present invention to provide a horn vibrating body for an ultrasonic atomizer whose atomization effect is not adversely affected even when the load changes.

(d) Means and operation for solving the problem In the horn vibrating body of the present invention, the atomizing part integrally formed at the tip of the small diameter part has two regions having different distances from the center to the edge. It is configured.

The horn vibrating body of this ultrasonic atomizer supplies liquid to one region having a different distance from the center to the edge, and vibrates for atomization in the other region. The area where liquid is supplied is
Since the resonant frequency is different from the region for atomization, atomization is not performed in the liquid supply region.

Therefore, even if the load changes and the amount of liquid in the liquid supply area changes, vibrations at a constant frequency continue in the atomization area, and a predetermined atomization is performed.

(E) Examples The present invention will be explained in more detail with reference to Examples below.

FIG. 3 is a sectional view of an ultrasonic inhaler in which the present invention is implemented. This ultrasonic inhaler 1 includes a main body part 2 and a liquid supply part 3.
and a suction section 4.

The main body part 2 has an outer shape formed by a main body case 5 and a bottom cover 6, and has an oscillation circuit board 11 inside which is mounted with a power supply board 7, a power jack 8, a battery 9, and an electronic circuit part 10 such as an oscillation circuit.
, a microswitch 12 as a power switch, a drive board 14 for the ultrasonic transducer 13, and the like are housed. Note that 15 is a switch cover.

The liquid supply section 3 includes a bottle 16 for storing water or a chemical solution to be atomized, and a water supply nozzle 17 for guiding the liquid in the bottle 16 to an atomization section of a horn, which will be described later. A more specific structure of the liquid supply section 3 will be described later.

The suction part 4 is a rigid metal body with a conical shape, and has a large diameter part and a small diameter part, an ultrasonic vibrator 13 is attached to the large diameter part, and a diaphragm, that is, an atomization part 18 is formed in the small diameter part. horn 19, suction nozzle 20, sanitary cap 21
It is composed of.

In addition, the main body case 5, bottom cover 6, switch cover 15
The sanitary cap 21 is made of ABS resin, and the bottle 16, water supply nozzle 17, and suction nozzle 20 are made of styrene resin.

FIG. 1 is an enlarged sectional view showing only the liquid supply section 3 and horn 19, and FIG. 2 is a front view of the enlarged portion. The bottle 16 has a rectangular shape in side view and an inverted U-shape in front view, and is made of transparent styrene resin as described above.

Further, a cylindrical nozzle mounting port 22 is provided on the bottom plane 16a.

Further, the nozzle mounting port 22 is configured such that the water supply nozzle 17, which is covered with a tube 23 made of an elastic material such as rubber, is mounted from below. In the attached state, the tube 23 is tightly attached to the inner wall of the nozzle attachment port 22 of the bottle 16, thereby preventing liquid leakage and preventing the water supply nozzle 17 from falling out of the bottle 16.

The water supply nozzle 17 is provided with two liquid supply grooves 24 and 24 in the axial direction for guiding the liquid in the bottle 16 to the outside using gravity and capillary action, and is provided with two liquid supply grooves 24 and 24 on the same line as the liquid supply grooves 24. A slightly more complicated outside air introduction groove 25 is provided in order to introduce into the bottle 16 the same volume of outside air that the liquid was led out of the bottle, and furthermore, a temporary groove 25 is provided in the circumferential direction perpendicular to the groove 24.25. In order to store the suction liquid, a plurality of grooves 26 having a chamber function are provided.

The tip 27 of the water supply nozzle 17 is made long so that the liquid supply groove 24 for water supply is sufficiently immersed in the liquid in the bottle 16. The water supply nozzle 17 is provided with flanges 28 and 29 for fitting the tube 23, and the lower flange 2
Reference numeral 9 is provided for positioning the water supply nozzle 17 and the nozzle mounting port 22. The lower end 3o of the water supply nozzle 17 is attached so as to come into contact with the atomizing part of the bone 19, that is, the diaphragm 18.

The horn I9 has a conical shape as described above, and the ultrasonic transducer 13 is bonded to the end face of the large diameter part 31, and the small diameter part 3
A diaphragm 18 is integrally formed on 2. Diaphragm work 8
The upper part of the disk shape is notched, and the outer periphery is formed of an arcuate non-notched part 33 and a chordal notched part 34. That is, the diaphragm 18 has non-cut portions 33 having different distances from the center.
and a notch 34.

The lower end 3o of the water supply nozzle 17 is connected to the water supply groove 24 through the water supply groove 24.
On the other hand, the section 30a is cut out along the chord shape of the notch 34 of the diaphragm 18. The other 30b is formed into a triangular protrusion, and the lI! of the diaphragm 18! It is in contact with the fog surface, that is, the non-cut portion 33.

When operating this ultrasonic inhaler l to perform an inhalation action, remove the sanitary cap 21 from the bottle 16 shown in FIG. Then, operate the switch cover 15 to turn on the micro switch 12. As a result, the ultrasonic vibrator 13 starts vibrating, and the horn 19 transmits the vibration to the diaphragm 18. On the other hand, the liquid in the bottle 16 is guided from the lower ends 30a, 30b of the water supply nozzle 17 to the notch 34 of the diaphragm 18 due to its own weight and the capillary action of the liquid supply groove 24. The liquid guided to the notch 34 of the diaphragm 18 is pulled into the non-notch portion 33 by the vibration of the non-notch portion 33, is driven by the vibration energy, and is atomized. The atomized liquid is discharged in the direction of arrow A.

The other lower end 30b of the water supply nozzle 17 is triangular,
Since it intersects with the notch 34 at two points P and Q, the liquid is supplied from these points. That is, liquid is supplied from two directions. Since the liquid is supplied to the entire circumference of the non-notched portion 33 from these two directions, the atomization surface becomes wider. In addition, the notch 34
Even if the supply liquid changes at this point, this portion does not contribute to the atomization effect, so it does not affect the vibration of the non-notched portion 33. Therefore, even if the load changes, the resonant frequency of the non-notched portion 33 does not change, and the original vibration, that is, the atomization effect continues.

In addition, in the above embodiment, the water supply nozzle is used to apply water to the diaphragm.
Although the case where liquid is supplied from above has been described, this invention
However, as shown in FIG. 4, the liquid may be supplied from below to the notch 34 of the diaphragm 18 of the horn 19 using a cotton swab 40 from a bottle (not shown). good.

Alternatively, as shown in FIG. 5, liquid may be supplied from above to the notch 34 of the horn 19 via a cotton swab 51 from a bottle 50 provided below the horn 19. In either case of Fig. 4 or Fig. 5.

Also, since the bottle is placed below the horn 19, supercharging due to the weight of the liquid can be avoided.

Furthermore, although a conical horn was used as the horn in each of the above embodiments, the present invention is applicable to other types of horns,
For example, as shown in FIG. 6, the present invention can also be applied to a stepped horn 60. In this embodiment, a stepped horn 60
A cotton swab 6 is inserted from below into a notch 63 formed in the diaphragm 61 of
4 to supply liquid.

Furthermore, in each of the above embodiments, a circular diaphragm with a portion cut out is used as the diaphragm, but a rectangular diaphragm having long sides and short sides may also be used.

(f) Effects of the Invention According to the horn vibrating body of the present invention, since the diaphragm is constituted by two regions with different distances from the center to the edge, liquid is supplied to one region and atomized in the other region. By performing this action, fluctuations in load do not affect the atomization action, and an ultrasonic atomizer that is resistant to fluctuations in load can be obtained.

Furthermore, since the liquid is separated into two directions and supplied to the diaphragm, a wide oscillation surface can be used, and the atomization efficiency can be increased.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of the liquid supply section and horn portion of an ultrasonic inhaler according to an embodiment of the present invention, FIG. 2 is a front view of the enlarged portion, and FIG. Figure 4 <a> 13:n sound 1 m weight) 18: Pain fpv go 19: 71”--> Figure 5 <a> (b) Cb) Figure 6 <a> 61: JKIIrJ Lord 〃 Cb) Cb)

Claims (2)

[Claims] (1) In a horn vibrating body of an ultrasonic atomizer in which an ultrasonic vibrator is provided on the end face of a large diameter part and an atomizing part is integrally formed at the tip of a small diameter part, the atomizing part is A horn vibrating body for an ultrasonic atomizer, characterized in that it is composed of two regions having different distances from the center to the edge. (2) The atomizing section is a partially cutout circular diaphragm, and the two regions have edges formed by an arcuate section and a chord section. Horn vibrating body of ultrasonic atomizer.