JPH0522056U - Ultrasonic atomizer - Google Patents

Abstract

(57) [Summary] [Object] To provide an ultrasonic atomizer capable of reliably preventing resonance and displacement of a liquid reservoir holder. [Structure] Horn holder 6a and mounting portion 6 of liquid holder 6
By integrally forming b and b, the number of assembling points with the horn 4 is reduced and the liquid reservoir holder 6 is prevented from being displaced. Further, since the vibration amplitude on the base end side of the horn 4 is small, the liquid reservoir holder 6 is assembled at a site corresponding to the vibration node on the base end side of the horn 4 to resonate the liquid reservoir holder 6. To prevent.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an ultrasonic atomizer used in a hand disinfection device and the like.

[0002]

[Prior Art]

 Although not yet publicly known, the applicant has proposed a device for this type of ultrasonic atomization device (Japanese Patent Application No. 2-113407).

This ultrasonic atomizer is a vibrator that generates vibration by applying a high-frequency signal, and a base end is connected to the vibrator to increase the amplitude of the vibration generated by the vibrator and output it from the tip. It has a column-shaped horn and a mounting plate fixed to the base end side of the horn, so that the liquid supplied to the tip of the horn is atomized by the output vibration of the horn. There is. In addition, a liquid reservoir holder for storing the supplied liquid around the horn is attached to the tip of the horn, and the liquid reservoir holder and the horn have annular recesses and protrusions that fit with each other. Therefore, it is assembled. The tip of the horn penetrates through the lower end of the liquid holder, and outlets are provided on both sides of the horn's penetrating portion so that the supply liquid can be gradually discharged from each outlet. ing. Also, since the outlets are provided on both sides of the horn, the liquid that has flowed out is atomized intensively from the positions corresponding to the outlets at the tip of the horn, and the spread of the spray form is directed. Sex has come to occur.

[0004]

[Problems to be solved by the device]

 By the way, when the horn vibrates, antinodes and nodes of the vibration appear alternately in the axial direction of the horn. Therefore, in the above-mentioned conventional example, the tip of the horn is made to correspond to this antinode, and the vibration of maximum amplitude is output from the tip. Further, since vibration is disturbed when an external force is applied to the horn, the mounting plate and the liquid reservoir holder are respectively attached to the portions corresponding to the vibration nodes having the least influence on the horn. However, even if it is said that there is little influence, it is not preferable to assemble the mounting plate and the liquid reservoir holder to the horn individually because the contact points between the horn and the outside increase, and the amplitude at the tip side of the horn is not preferable. Is enlarged, the liquid reservoir holder may resonate with the horn. For this reason, there is a problem in that the output vibration of the horn is likely to be disturbed or abnormal noise is generated. Further, the liquid reservoir holder and the horn are assembled by an annular concave portion and a convex portion, but they are not firmly joined together in order to reduce the external force on the horn. For this reason, there is also a problem in that the liquid holder is rotated in the circumferential direction of the horn due to the vibration of the horn to cause a positional deviation, and the spreading direction of the spray form is deviated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an ultrasonic atomizer capable of reliably preventing resonance and displacement of the liquid reservoir holder. Especially.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a vibrator that generates vibration by applying a high-frequency signal, and a vibration that is generated by the vibrator with its base end connected to the vibrator. A horn that outputs from the tip of the horn, a mounting part for fixing the horn to the outside, and a liquid reservoir holder that collects the liquid supplied to the horn around the horn tip side. In an ultrasonic atomization device in which liquid is discharged from the outlet provided in the liquid holder to the tip of the horn and the liquid is atomized by the output vibration of the horn, the liquid holder and the mounting The part is integrally formed and attached to the part corresponding to the vibration node on the base end side of the horn.

According to a second aspect of the present invention, a plurality of outlets of the liquid reservoir holder are provided in the horn circumferential direction, and outside the liquid reservoir holder from the vicinity of each outlet to the tip side of the horn. It has a plurality of protrusions extending toward it.

Further, according to a third aspect of the present invention, a vent hole is provided on the side surface of the liquid reservoir holder so as to communicate with the inside and outside of the liquid reservoir holder.

[0009]

[Action]

 According to the ultrasonic atomizing device of claim 1, since the liquid reservoir holder and the mounting portion are integrally provided, the assembly position with the horn may be one, and the liquid reservoir holder is located at the same position. There is no gap. Further, since the vibration amplitude is small on the base end side of the horn, the liquid reservoir holder assembled at the part corresponding to the vibration node on the base end side does not resonate with the vibration of the horn. ..

According to the ultrasonic atomizing device of the second aspect, in addition to having the action of the first aspect, the liquid flowing out from each outflow port is generated between each protrusion and the horn. It is guided around each protrusion by the action of capillarity or surface tension, and is atomized collectively from the position corresponding to each protrusion.

According to the ultrasonic atomizing device of the third aspect, in addition to the action of the first or second aspect, the liquid reservoir is provided with the vent hole on the side surface thereof. The inside and outside of the holder have the same atmospheric pressure.

[0012]

【Example】

 1 to 7 show an embodiment of the present invention, which shows an ultrasonic atomizer used in a hand sanitizer.

In FIG. 1, reference numeral 1 denotes a Langevin type vibrator that generates vibration by applying a high-frequency signal. For example, this vibrator 1 is used to cause the vibrator 1 to generate a constant vibration. The oscillation circuit 2 is connected via a conductor. Further, the oscillator circuit 2 is driven by the electric power supplied from the power source 3 such as a household AC power source.

Reference numeral 4 denotes a horn that expands the amplitude of the vibration generated in the vibrator 1 and outputs the horn from the tip end thereof, and the base end thereof is connected to the vibrator 1. The horn 4 is made of aluminum or the like, and its base end portion is formed to have the same diameter as the vibrator 1, and the lower portion from this upper end portion has a smaller diameter than the base end portion, and the lower portion of this small diameter portion has a smaller diameter than this. The diameter is slightly larger, and the lower part has a small diameter up to the tip. Further, an annular groove 4a formed in the circumferential direction of the horn 4 and a lower portion of the annular groove 4a are formed in a boundary portion between the base end portion of the horn 4 and a small diameter portion therebelow. Flange portions 4b are provided respectively, and the flange portions 4b correspond to the vibration nodes of the horn 4. On the other hand, the tip of the horn 4 is formed in a substantially conical shape, and forms the vibration output portion 4c of the horn 4. The vibration output portion 4c is composed of two conical surfaces having different apex angles, and the conical surface on the tip side is formed to have a larger apex angle than the other conical surface. The apex angle of each conical surface may be arbitrarily determined according to the desired form of dispersion, but if it is used for finger distribution, the conical surface on the tip side should be about 60 ° to 120 ° and the other conical surface should be conical. It is suitable to set the surface at about 10 ° to 80 °. Also, if the horn 4 is corroded by a liquid agent, etc., the stress during vibration may cause cracks and damage from the corroded portion. Therefore, the surface of the horn 4 is rust-proofed. There is.

Reference numeral 6 denotes a liquid reservoir holder that stores the disinfectant liquid on the outer periphery of the horn 4, and a horn accommodating portion 6 a that covers the horn 4 from the base end portion to the distal end side, and a horn accommodating portion. 6a and a mounting portion 6b that extends in the horizontal direction from both upper ends of the 6a. The horn accommodating portion 6a is formed in a substantially cylindrical shape, and the bottom surface of the horn accommodating portion 6a forms an inclined surface that becomes lower toward the center, and the tip end side of the horn 4 penetrates through the center portion of the bottom surface. This through-hole supports the outer periphery of the horn 4 by its opening edge, and concave-shaped disinfectant outlets 6c are formed on both sides of the horn 4 at the opening edge. ing. Outside the horn accommodating portion 6a, projections 6d extending from the vicinity of the outlets 6c toward the tip side of the horn 4 are provided, and the projections 6d and the side surfaces of the horn 4 are provided. There is a slight gap between them. Further, a vent hole 6e is provided on the side surface of the horn accommodating portion 6a so that the inside and outside of the horn accommodating portion 6a have the same atmospheric pressure. Further, a step portion 6f corresponding to the flange portion 4b of the horn 4 is formed on the upper edge of the horn accommodating portion 6a, and the lower surface side of the flange portion 4b is fitted into the step portion 6f. On the other hand, the mounting portion 6b is provided with screw mounting portions 6g at two positions near the horn accommodating portion 6a, and a screw 7 is screwed to each screw mounting portion 6g from above. A washer 8 is attached to each screw 7, and one end of each washer 8 is inserted into the annular groove 4 a of the horn 4. As a result, the flange portion 4b is sandwiched between one end of each washer 8 and the step portion 6f, and the liquid reservoir holder 6 is assembled to the horn 4. However, the flange portion 4b is not pressed by each washer 8 and is assembled with a slight play. Further, screw holes 6h for fixing the mounting portion 6b to the outside are formed at both ends of the mounting portion 6b.

Reference numeral 9 is a pump for supplying the sterilizing solution to the horn 4, the tip of its discharge pipe 9 a is inserted into the side surface of the liquid reservoir holder 6, and its suction pipe 9 b is connected to the disinfecting solution storage tank 10. ..

In the ultrasonic atomization device configured as described above, when power is supplied from the power supply 3 to the oscillation circuit 2, a predetermined high frequency signal is applied from the oscillation circuit 2 to the vibrator 1. The vibration generated by the vibrator 1 has its amplitude expanded by the horn 4, and is output from the vibration output unit 4c at the tip. At this time, vibration nodes and antinodes alternately appear in the horn 4 in the axial direction of the horn 4, and the vibration output section 4c corresponds to the antinode having the largest amplitude.

When the disinfectant liquid is supplied from the discharge pipe 9a into the liquid reservoir holder 6 in this vibrating state, the disinfectant liquid temporarily accumulates around the horn 4 and gradually flows out from each outlet 6c. Further, the disinfecting liquid that has flown out reaches the vibration output unit 4c and is atomized at the same time when it contacts the vibration output unit 4c. At this time, the disinfecting liquid flowing out from each outlet 6c is guided between the protrusion 6d and the horn 4 by the action of the capillary action, and each outlet 6a sandwiches the horn 4 between them. Since they are located on both sides, the vibration output part 4c is supplied with the disinfectant solution at a location corresponding to each outlet 6c. As a result, directivity is generated in the direction in which the atomized disinfectant solution A is scattered, and as shown in FIGS. 6 and 7, a spray pattern having a lateral spread is formed.

As described above, according to the ultrasonic atomizing device of the present embodiment, the horn container portion 6a and the mounting portion 6b of the liquid reservoir holder 6 are integrally formed. Only the flange portion 4b needs to be attached, and the influence of the external force on the horn 4 can be minimized, and the liquid reservoir holder 6 does not move out of position, and the spraying form can be expanded. The direction can be kept constant. Further, since the flange portion 4b corresponds to the vibration node on the base end side of the horn 4, since the amplitude of the vibration is small on the base end side of the horn 4, the resonance of the liquid reservoir 6 is surely prevented. can do. Further, since the horn accommodating portion 6a and the mounting portion 6b of the liquid reservoir 6 are integrally formed, the number of parts can be reduced, and the cost and the number of assembling steps can be reduced.

Further, the outlets 6c provided on the bottom surface of the liquid reservoir holder 6 are positioned on both sides of the horn 4, respectively, and the protrusions 6d provided near the outlet 6c vibrate the horn 4. Since the disinfectant solution is concentratedly supplied to the positions corresponding to the respective outlets 6c of the output section 4c, the spraying direction of the atomized disinfectant solution has a directivity to form a horizontally wide dispersion form. be able to. Therefore, when disinfecting the fingers, both hands are arranged side by side, so that the entire fingers can be disinfected evenly.

Furthermore, since the inside and outside of the liquid reservoir holder 6 can be kept at the same atmospheric pressure by the vent hole 6e provided on the side surface of the liquid reservoir holder 6, it is possible to smoothly discharge the disinfectant liquid from the outlet 6c. In addition, the disinfectant solution can be discharged from the ventilation port 6e even if the disinfectant solution is excessively supplied to the liquid reservoir holder 6 due to a failure of the pump 9 or the like.

[0022]

[Effect of the device]

 As described above, according to the ultrasonic atomizing device of the first aspect, the influence of the external force on the horn can be minimized, and the resonance of the liquid reservoir holder can be reliably prevented. You can In addition, since the liquid reservoir holder is not displaced, the spreading direction of the spraying form can be kept constant.

Further, according to the ultrasonic atomizing device of the second aspect, since it is possible to have an arbitrary directivity in the liquid scattering direction, it is possible to form a spray form that spreads in a predetermined direction.

Further, according to the ultrasonic atomizing device of the third aspect, the inside and outside of the liquid reservoir holder can be maintained at the same atmospheric pressure, so that the liquid can smoothly flow out from the outlet.

[0025]

[Brief description of drawings]

[0026]

FIG. 1 is a side view of a main part of an ultrasonic atomizing device according to an embodiment of the present invention.

[0027]

FIG. 2 is a schematic configuration diagram of an ultrasonic atomization device according to an embodiment of the present invention.

[0028]

FIG. 3 is an exploded perspective view of a horn and a liquid reservoir holder.

[0029]

FIG. 4 is a partial cross-sectional view of a liquid reservoir holder.

[0030]

5 is a cross-sectional view taken along the line AA of FIG.

[0031]

FIG. 6 is a side view showing a spraying mode of the disinfecting liquid.

[0032]

7 is a sectional view taken along the line BB of FIG.

[0033]

[Explanation of symbols]

1 ... Transducer, 4 ... Horn, 6 ... Liquid reservoir holder, 6a ... Ho
Housing portion, 6b ... mounting portion, 6c ... outlet, 6d ... protrusion,
6e ... Vent.

Claims (3)

[Scope of utility model registration request] 1. A vibrator that generates vibration by applying a high-frequency signal, a horn whose proximal end is connected to the vibrator and which expands the amplitude of vibration generated by the vibrator and outputs it from the distal end. A mounting portion for fixing the horn to the outside, and a liquid reservoir holder for storing the liquid supplied to the horn around the tip of the horn, and the liquid is supplied from the outlet provided in the liquid reservoir holder. In an ultrasonic atomizer which flows out to the tip of a horn and atomizes the liquid by the output vibration of the horn, the basin side of the horn is formed by integrally forming the liquid reservoir holder and the mounting portion. An ultrasonic atomizer characterized by being attached to the part corresponding to the vibration node of the. 2. A plurality of outlets of the liquid reservoir holder are provided in the horn circumferential direction, and a plurality of outlets are provided outside the liquid reservoir holder from the vicinity of the outlets toward the tip side of the horn. The ultrasonic atomizing device according to claim 1, wherein a protrusion is provided. 3. The ultrasonic atomizing device according to claim 1, wherein a vent hole is provided on a side surface of the liquid reservoir holder so as to communicate with the inside and the outside of the liquid reservoir holder.