JPS6311937B2 - - Google Patents

Description

Detailed Description of the Invention: The present invention atomizes water into fine particles by vibration of an ultrasonic vibrator, and inhales this atomization into the nasal cavity and oral cavity to moisten the mucous membranes, soothe the dry state of the mucous membranes, and relieve inflammation. Regarding liquid atomizer for.

When a liquid (water) is atomized by ultrasonic vibration, if the amount of liquid supplied to the atomizing surface of the ultrasonic vibrator exceeds the atomizing capacity of the ultrasonic vibrator, a large amount of liquid will be generated on the atomizing surface of the ultrasonic vibrator. adheres, forming a thick liquid film on the spray surface, which increases vibration transmission loss and increases the vibration load on the ultrasonic vibrator, which increases the required power. The child's spraying ability decreases, making it increasingly difficult to spray with low power. This point will be explained using the graph of FIG. The one-dot chain line A and the two-dot chain line B indicate the spraying ability of the ultrasonic transducer, and the solid line C and the broken line D indicate the amount of water supplied from the water absorbing body to the ultrasonic transducer. The vertical axis represents the spray capacity or water supply amount, and the horizontal axis represents the elapsed time after turning on the power switch. The dashed line A shows the normal spraying capacity of the ultrasonic vibrator. There is no problem if the water supply amount is smaller than this normal spraying capacity, but if the water supply exceeds this normal spraying capacity as shown by the broken line D. When too much water is supplied, a thick liquid film forms on the spray surface, and as a result, the spraying ability of the ultrasonic vibrator drops sharply as shown by the two-dot chain line B, and the amount of spray drops as shown by the two-dot chain line B, making spraying impossible. It becomes. This problem becomes noticeable during startup. This is because at the time of starting, there is a liquid contained in the water absorbing body, so the amount of water supplied is large, and the curve shows a rise at the time of starting. Therefore, it is important for stable startup to reduce the amount of water supplied, especially at the initial stage.
However, there is a problem in that if the water absorbing body is made thinner as a whole to reduce the amount of water supplied, the amount of spray in a steady state also decreases, making it impossible to obtain a satisfactory amount of spray.

The present invention was made in view of the above-mentioned problems, and its purpose is to be able to start spraying reliably even if the spraying capacity setting of the ultrasonic vibrator is small, and to maintain a sufficient spray amount during steady operation. There is a liquid atomizer that you can get.

The present invention will be explained in detail below with reference to the accompanying drawings. Reference numeral 3 denotes a housing made of a synthetic resin molded product, and the upper part of the housing 3 is divided into upper and lower parts by a partition plate 6, and the partition plate 6 has a mounting opening 7 for mounting the ultrasonic transducer 1. It has a round hole opening. Immediately below the partition plate 6, there is built-in a printed wiring board 16 on which an oscillation circuit section 9 for vibrating the ultrasonic transducer 1 and a power switch 10 are mounted, and a power supply section 11 is provided below it. . The power supply unit 11 has a dual power supply system, and can be supplied with a dry cell battery 12 and used as a power source, or can also be used as a power source with a household AC power source via an external AC power adapter connected to the jack 13. It's becoming like that. 1 is an ultrasonic vibrator consisting of an electrostrictive element 14 that generates vibrations and a metal horn 15 that magnifies the vibrations; one electrode of the electrostrictive element 14 is provided at the center of the back surface of the electrostrictive element 14; The other electrode is electrically connected to the metal horn 15 by bonding the electrostrictive element 14 and the metal horn 15 with a conductive adhesive, and an annular flange 17 is provided on the outer periphery of the metal horn 15. The ultrasonic transducer 1 is protruded and attached to the lower surface of the mounting opening 7 by an annular flange 17 . Further, a tapered chamfer 31 is formed on the outer periphery of the tip of the metal horn 15 of the ultrasonic transducer 1. 20 is the partition plate 6
A water supply tank is set on the top of the tank so that it can be taken in and out.A tank cap 39 is attached to the water supply tank 20 in a watertight manner, and an inclined guide hole 40 is bored in the tank cap 39. The water absorbent body 22 is bent gradually through the holes 40.
This prevents an accident in which the water absorbing body 22 is extremely bent locally and water absorption is stopped or reduced there. The water absorbent body 22 has a core material 33 made of a felt band made of non-woven fabric made of acrylic resin, and both sides thereof are sandwiched between protective plates 34 made of a synthetic resin molded product such as polypropylene resin.
A pair of front and back protection plates 34 are partially welded together and integrated, and have a symmetrical shape along the longitudinal direction. This welded portion 37 allows the water absorbent body 22 to
A small cross-section portion 2 with a reduced cross-sectional area is formed near the end of the core material 33, and the water passage of the core material 33 is narrowed in this small cross-section portion 2. Furthermore, a mounting hole 35 is bored in this welded part 37, and a slit 3 is formed in the welded part 37 from the hole edge of the mounting hole 35 in a direction substantially perpendicular to the hole edge.
8 is cut in. Further, both ends of the core material 33 protrude slightly from both ends of the protection plate 34, and an arc-shaped notch 32 is provided at the tip of the core material 33. The radius of this arcuate notch 32 is slightly larger than the radius of the tip of the metal horn 15. A detachable bottom cover 18 is attached to the bottom of the housing 3, and an accent ring 19 and a transparent detachable mask 25 are attached to the top. The accent ring 19 and the mask 25 have a spray port 26 facing the mounting opening 7.
a and 26b are open, and a hook button 36 is provided protruding from the accent ring 19 near the spray nozzle 26a. Therefore, the water absorbent body 22 is inserted into the guide hole 40.
The water absorbing body 22 is positioned by inserting the water absorbing body 22 into the water tank 20 and immersing one end in the water in the water supply tank 20, removably fitting the attachment hole 35 on the other end into the hook button 36, and applying ultrasonic vibration to the arc-shaped notch 32. The front surface of the core member 33 is made to abut obliquely on the chamfered portion 31 on the side surface of the tip of the child 1 and protrudes forward beyond the tip surface of the ultrasonic transducer 1. In this way, the attachment hole 35 for fixing the water absorbing body 22 is tightly attached to the protection plate 34, and the welded portion 37 is
The slit 38 makes it easy to attach and detach the water absorbent body 22, and the slit 38 makes it easy to attach and detach the water absorbent body 22. Mounting hole 3
5 does not widen and the fitting force decreases, and the water absorbent body 22 can be positioned accurately.

However, when the power switch 10 is turned on,
A high frequency voltage having a frequency approximately equal to the mechanical resonance frequency of the metal horn 15 generated by the oscillation circuit section 9 is applied directly to the electrostrictive element 14 through the lead wire 5, and the other side is applied to the electrostrictive element 14 via the metal horn 15 and a conductive adhesive. is applied to the electrostrictive element 14. Electrostrictive element 1
The ultrasonic vibrations generated by the metal horn 15 vibrate together with the metal horn 15, and the spray surface at the tip of the metal horn 15 is caused to vibrate greatly due to the amplitude expansion effect of the metal horn 15. On the other hand, the core material 33 of the water absorbing body 22 sucks up the water in the water supply tank 20 by capillary action, and supplies water in a thin film form to the vibrating surface of the tip of the metal horn 15, as shown in FIG. 6a. As waves are generated on the vibrating surface due to the vibration, the waves are torn off from the crest as shown in FIG. 6b, and mist particles are generated and sprayed forward. In addition, the amount of water supplied from the water absorber 22 to the spray surface is the water content of the water absorber 22 + the suction capacity of the water absorber 22 at startup, but the water passage is narrowed by forming the small cross section 2 on the water absorber 22. Therefore, the suction ability of the water absorbing body 22 can be limited, and the maximum amount of water supply, which was represented by the broken line D before forming the small cross-section part 2, can be changed to the solid line C by providing the small cross-section part 2. The spraying ability is lowered to below the one-dot chain line A indicating the spraying ability, and even if the spraying ability of the ultrasonic vibrator 1 is low, spraying can be reliably started. Therefore, power consumption can be reduced by using a low-power device. Furthermore, if the small cross-section part 2 is provided at the end of the contact side of the ultrasonic vibrator 1, the water content near the contact part can be reduced and the effect will be even better. Since the distance is shortened, there is less decrease in the amount of water supplied during steady operation due to the formation of the small cross-section portion 2.

When the water in the water tank 20 becomes empty,
Remove the water absorbent body 22 from the hook button 36, and
At the same time, the water supply tank 20 is taken out and water is replenished, but at this time, the core material 33 is sandwiched between the protective plates 34, so it does not get dirty with hand marks, etc., and the spray can be used hygienically without contaminating it. .

What is shown in Fig. 5 is a circuit diagram of the liquid sprayer. When the external AC power adapter is connected to the jack 13, the switch 8 is switched and the battery circuit is opened, allowing the use of household AC power. It will become.

As described above, in the present invention, one end of the water absorbing body for sucking up water and supplying it to the ultrasonic transducer is inserted into a water supply tank, the other end of the water absorbing body is brought into contact with the ultrasonic transducer, and the water absorbing body is Since the cross section is formed with a small cross section, even if the spraying capacity of the ultrasonic vibrator is small, the amount of water supplied at startup (especially the maximum amount) can be lowered to ensure a spray start, and the spray can be started steadily. There is an advantage that a sufficient amount of spray can be obtained during operation. Therefore, spraying can be performed reliably with low power consumption.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the present invention;
Figure 2 is a longitudinal cross-sectional view of the same as above, Figures 3 a, b, and c are front views, top views, and cross-sectional views of the water absorbing body, and Figure 4 is a cross-section of the water absorbing body in contact with an ultrasonic transducer. Figure 5 is a circuit diagram of the present invention, Figures 6a and b are explanatory diagrams and enlarged views showing the state of the liquid film excited by the ultrasonic vibrator, and Figure 7 is the spray of the ultrasonic vibrator. It is a graph showing an example of a time function of the capacity and the amount of water supplied from the water absorbing body to the ultrasonic transducer. 1... Ultrasonic transducer, 2... Small cross section, 20...
...Water tank, 22...Water absorber.

Claims (1)

[Claims] 1. Insert one end of the water absorbing body for sucking up water and supplying it to the ultrasonic transducer into a water supply tank, and bring the other end of the water absorbing body into contact with the ultrasonic transducer. A liquid sprayer characterized in that a small cross-sectional part is formed with a small cross-sectional area. 2. The liquid sprayer according to claim 1, wherein the small cross-sectional portion is provided near the end of the water absorbing body on the ultrasonic vibrator contacting side. 3. Both the front and back sides of the core material are sandwiched between a pair of protection plates to form a water absorbing body, and the pair of protection plates are partially welded to each other to provide a small cross-section part in the core material, and the welded portion of this protection plate is Claim 1, characterized in that the holding means is formed between the casing and the casing.
Liquid sprayer as described in section.