JP2014155908A - Liquid spray device and using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid spray device capable of stabilizing spray with simple construction in low cost.SOLUTION: A liquid spray device 1 includes an elastic diaphragm 4 having many micro-pores, and an ultrasonic vibrator 5. In a section around a cylindrical protrusion 31 in a tank 3, a hole 30 is formed for communication between the inside and outside of the tank. The hole is positioned above the liquid level of liquid 7 stored in the tank.

Description

  The present invention relates to a liquid spraying apparatus and use thereof, and more specifically, makeup, skin treatment, and the like can be performed by spraying a liquid such as a cosmetic liquid, a cosmetic liquid, a chemical liquid, or water on the skin surface. The present invention relates to a portable liquid spray device and a cosmetic liquid spray device.

  A cosmetic liquid spraying device that is easy to carry and can be carried anywhere, and that moisturizes the skin by spraying a mist of cosmetic liquid on the user's face, etc., or performs a cosmetic treatment that enhances the activity of the skin's cellular tissue Are known.

  As a conventional example of such a cosmetic liquid spraying device, for example, Patent Document 1 discloses a vibrating spray structure. The vibratory portable spray 100 disclosed in Patent Document 1 has been made for the market so that it can be easily carried, and as shown in FIG. 7, the main body for setting a circuit board 111 and a power source 112 is used. The seat 110 includes a front lid 101 that covers the front, rear, and upper surface, a rear lid 102, and an upper lid 103. A liquid storage tank 113 is formed on the main seat 110, and a separately prepared lid 114 is thermocompression bonded. And unite. A liquid outlet 115 is provided below the liquid storage tank 113 so that liquid is supplied to the vibrating element 117 by gravity, and atomized by ultrasonic waves and sprayed.

  Specifically, the main seat 110 is made of an insulating material and has a structure that is recessed from the back to the front to form a cavity. An irregularly shaped liquid storage tank 113 is provided above the rear end portion of the main seat 110, and each internal surface viewed from the cross section is designed to be vertical or inclined so that the liquid storage tank 113 is provided. The liquid inside is configured to exert sufficient gravity action toward the lower liquid outlet 115. In addition, the liquid storage tank 113 is provided with a circular liquid inlet 116 that opens upward, and a liquid outlet 115 is provided at the bottom of the liquid storage tank 113 in the forward direction perpendicular to the cross section. After the liquid is brought into contact with the vibrating piece 117 and atomized by the action, the liquid is ejected from the guide hole 118.

  The vibrating portable spray 100 injects the necessary liquid from the liquid inlet 116 into the liquid storage tank 113, and when it is full, the liquid inlet 116 is sealed with a plug 119. The liquid placed in the liquid storage tank 113 reaches the vibrating piece 117 of the liquid outlet 115 due to its own gravity, but since the nozzle diameter of the vibrating piece 117 is set to the micron level, the stored liquid Is stored in the liquid storage tank 113 without overflowing.

Utility Model Registration No. 3161996 (Registered July 28, 2012)

  However, in the vibrating spray structure disclosed in the above-mentioned conventional Patent Document 1, necessary liquid is injected from the liquid inlet 116 into the liquid storage tank 113, and when it is full, the liquid inlet 116 is sealed with the stopper 119. As the liquid in the liquid storage tank 113 is reduced by spraying the liquid, the pressure in the liquid storage tank 113 is lowered. When the negative pressure in the liquid storage tank 113 progresses, air is mixed from the nozzle diameter of the vibrating piece 117, and fine bubbles are generated in the liquid in the liquid storage tank 113, which makes spraying unstable. Have a problem.

  Therefore, in the vibration type spray structure disclosed in the above-mentioned Patent Document 1, a small ventilation hole having a valve structure is provided around the liquid storage tank 113 to balance the atmospheric pressure inside and outside the liquid storage tank 113 when the vibration piece 117 vibrates. It is described that a better atomization effect can be achieved while maintaining the above.

  However, the size of the small vent and the position in the liquid storage tank 113 in the small vent are not clearly mentioned. For example, the small ventilation hole is formed to be smaller than the nozzle size of the vibrating piece 117, and the small ventilation hole is positioned below the liquid storage tank 113 so as to remain in contact with the liquid until the liquid is completely sprayed. When formed in the vicinity of the nozzle diameter of the vibrating piece 117, the liquid in the liquid storage tank 113 is reduced by spraying the liquid, and the pressure in the space in the liquid storage tank 113 is reduced. For this reason, when the negative pressure in the space in the liquid storage tank 113 has progressed, the mixing of air from the nozzle diameter of the vibrating piece 117 becomes more dominant than the small vent hole, so spraying is not possible for the same reason as described above. There is a problem of becoming stable.

  Further, for example, when the position of the small vent is formed on the upper part of the liquid storage tank 113 that is not covered with the liquid, the liquid in the liquid storage tank 113 is sprayed by spraying the liquid in the small vent having the valve structure. The pressure in the liquid storage tank 113 is reduced. Therefore, when the negative pressure in the liquid storage tank 113 advances and the pressure in the liquid storage tank 113 is equal to or lower than the cracking pressure of the valve structure, air is taken in, so the pressure balance can be adjusted with high accuracy. However, there is a problem that the spray becomes unstable for the same reason as described above.

  Furthermore, since it is very difficult to form a small vent having a valve structure capable of adjusting the pressure balance with high accuracy, there is a problem that the manufacturing cost of the liquid storage tank 113 is increased.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a liquid spraying apparatus capable of stabilizing spraying at low cost with a simple configuration and use thereof.

  In order to solve the above-described problem, a liquid spraying apparatus according to one aspect of the present invention includes a tank including a liquid supply port and a protruding portion formed to protrude and a liquid holding portion for holding liquid, a case, An elastic diaphragm having a large number of micropores supported by the case and attached to the liquid supply port, and an ultrasonic vibrator, and ultrasonically vibrating the elastic diaphragm with the ultrasonic vibrator A liquid spraying apparatus for spraying liquid stored in a tank from a liquid supply port through a large number of micro holes in an elastic diaphragm, wherein the projecting portion side portion of the tank has a hole communicating with the inside and outside of the tank Is formed, and the hole is located above the liquid level of the liquid stored in the tank.

  In order to solve the above-described problem, a cosmetic liquid spraying apparatus according to an aspect of the present invention includes the liquid spraying apparatus.

  According to one aspect of the present invention, there is an effect of providing a liquid spray device and a cosmetic liquid spray device that can stabilize spray at a low cost with a simple configuration.

It is sectional drawing which shows the structure of the liquid spraying apparatus which concerns on Embodiment 1 of this invention, and shows the spraying state of a liquid spraying apparatus. It is the perspective view which showed the structure of the tank in the liquid spraying apparatus of FIG. 1, and was seen from the liquid supply port side. It is the perspective view which showed the structure of the tank with which the liquid spraying apparatus which concerns on Embodiment 2 of this invention is equipped, and was seen from the liquid supply port side. It is the perspective view which showed the structure of the tank with which the liquid spraying apparatus which concerns on Embodiment 3 of this invention is equipped, and was seen from the liquid supply port side. It is sectional drawing which shows the structure of the tank in the liquid spraying apparatus which concerns on an Example, and shows a state when supplying and storing the liquid to this tank before attaching to a case. It is sectional drawing which shows the structure of the liquid spraying apparatus which concerns on a comparative example. It is a disassembled perspective view which shows the structure of the conventional liquid spraying apparatus.

Embodiment 1
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

  The liquid spraying device in this embodiment can be applied to a cosmetic liquid spraying device, for example. However, the present invention is not necessarily limited thereto, and in the present invention, not only cosmetic liquid as liquid of the liquid spraying device, but also chemicals for preventing bad breath, chemicals sprayed on wounds or sprains, and other liquid spraying devices It is possible to apply to. Hereinafter, a configuration suitable when the liquid spraying apparatus of the present embodiment is applied to a cosmetic liquid spraying apparatus will be described.

  Further, when the liquid spray device of the present embodiment is used as a cosmetic liquid spray device, for example, it is possible to perform a makeup or skin treatment by spraying a liquid foundation or a liquid such as cosmetic liquid or water onto the skin surface. It can be suitably used for a portable cosmetic liquid device.

  The configuration of the liquid spray apparatus according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view showing a configuration of a liquid spraying apparatus according to the present embodiment. FIG. 2 is a perspective view showing the configuration of the tank in the liquid spraying apparatus of FIG. 1 as seen from the liquid supply port side.

  As shown in FIG. 1, the liquid spray device 1 of this embodiment includes a case 2, a tank 3, an elastic diaphragm 4, an ultrasonic vibrator 5, a hole 30, and a packing 6.

  The case 2 is disposed so as to support the tank 3, the elastic diaphragm 4, the ultrasonic transducer 5 and the packing 6. The case 2 is made of a resin material by an injection molding method such as a blow molding method.

  The tank 3 stores a liquid 7 such as a cosmetic liquid sprayed from the liquid spraying apparatus 1. As shown in FIG. 2, the tank 3 includes a cylindrical protruding portion 31 and a liquid holding portion 32 as protruding portions connected to each other. Then, when the cylindrical protrusion 31 is attached to the case 2, the liquid 7 in the liquid holding part 32 is sprayed from the liquid spraying device 1 through the cylindrical protrusion 31. In addition, in this embodiment, although the cylindrical protrusion part 31 is formed in the cylinder shape, in this invention, a protrusion part is not specifically limited to a cylinder shape, What is necessary is just a protruding shape. Since the cylindrical projecting portion 31 is provided so as to project, the tank 3 can be easily attached to the case 2 and the packing 6 can be easily covered. It can be said that the cylindrical protruding portion 31 functions as a connecting portion for attaching the tank 3 to the case 2.

  As shown in FIGS. 1 and 2, a hole 30 is formed in the tank 3 to communicate the inside of the tank 3 with the outside of the tank 3. This hole 30 is formed on the cylindrical protrusion 31 side at the upper end of the liquid holding part 32 in the tank 3.

The air holes 30 can be formed by a blow molding die. That is, the tank 3 having the holes 30 at desired positions can be manufactured by providing a needle at a position where the holes 30 are to be formed in the mold and performing blow molding. Alternatively, the holes 30 can be formed at desired positions of the tank 3 by performing, for example, carbon dioxide (CO ₂ ) laser treatment on the tank 3 manufactured by the blow molding method. For example, the diameter of the hole 30 can be adjusted to several μm or more by changing the shape of the needle for forming the hole 30 and the output and aperture of the carbon dioxide (CO ₂ ) laser. The hole diameter of the air hole 30 is formed larger than the diameter of the minute hole of the elastic diaphragm 4. For example,
The elastic diaphragm 4 is attached to the liquid supply port 33 of the cylindrical protrusion 31 and has a number of micro holes (not shown) having a diameter size of about several μm to 100 μm. The elastic diaphragm 4 having such micro holes is made of a metal material such as stainless steel by, for example, electrocasting. In the present embodiment, the pores of the elastic diaphragm 4 have a tank 3 side diameter size of 80 to 100 μm and a spray side (external side) diameter size of several μm to several tens of μm. And the shape of the side wall which forms a micropore is a taper shape. That is, it is narrowed down so that the diameter size on the spray side (external side) is smaller than the diameter size on the tank 3 side.

  The ultrasonic transducer 5 has a wafer shape and is made of a material such as piezoelectric ceramics made of lead zirconate titanate (PZT), for example. Piezoelectric ceramics constituting the ultrasonic transducer 5 are controlled by being linked to a control electronic circuit board (not shown) via an electronic circuit (not shown). Thereby, mechanical displacement is generated by the piezoelectric effect generated by the energized piezoelectric ceramic. As a result, the elastic diaphragm 4 is pulled back and forth. The elastic diaphragm 4 vibrates back and forth at an ultrasonic frequency of, for example, 130 KHz, creates a pressure difference on both sides of the micropores, finely atomizes the liquid 7, and discharges the cosmetic liquid through the micropores. Thereby, the uniform and precise atomization effect is acquired.

  A storage space (not shown) is formed below the tank 3, and the control electronic circuit board (not shown) and a power source (not shown) are stored in the storage space. The ultrasonic transducer 5 is controlled by a switch (not shown) provided on the outer surface of the tank 3. The power source (not shown) may be a type supplied from an external power source or a type incorporating a power source, and any of them does not affect the effect of the present invention.

  The packing 6 is disposed so as to cover a part of the cylindrical protrusion 31 of the tank 3. The packing 6 is made of a soft material, and alleviates vibration generated from the operating elastic diaphragm 4 and also prevents the liquid 7 from leaking.

  A method of using the liquid spray apparatus 1 having the above configuration will be described.

  First, when injecting the liquid 7 into the tank 3 of the liquid spraying apparatus 1, the user removes the tank 3 from the case 2 of the liquid spraying apparatus 1. Then, after the liquid supply port 33 faces the tank 3, a liquid 7 such as a cosmetic liquid is injected from the liquid supply port 33. The injection amount of the liquid 7 at this time is preferably stopped to an amount that satisfies the liquid holding part 32, which is recommended as a method of use by the cosmetic liquid spray device manufacturer, for example, as shown in FIG. By doing so, a little air layer can be formed inside the tank 3. Thereby, the fluctuation | variation of the pressure at the time of spraying can be suppressed. That is, when the liquid 7 is fully stored in the tank 3, the degree of negative pressure during spraying is increased.

  Thereafter, the tank 3 is mounted on the case 2 so that the liquid supply port 33 of the tank 3 is in contact with the elastic diaphragm 4 with the liquid supply port 33 of the tank 3 facing upward. At this time, the cylindrical protrusion 31 of the tank 3 is sealed with the packing 6 by removing the air holes 30. Thereby, the liquid spraying apparatus 1 storing the liquid 7 is completed.

  When using the liquid spraying apparatus 1 storing the liquid 7, first, as shown in FIG. 1, the elastic vibration plate 4 is directed downward and the elastic vibration plate 4 is directed toward the ejection target. . At this time, the liquid 7 is stored in the tank 3 with an air layer. That is, the upper surface of the liquid 7 exists below the position of the hole 30.

  In this state, the ultrasonic transducer 5 is driven and controlled by a switch (not shown) provided on the outer surface of the tank 3. That is, by driving and controlling the ultrasonic vibrator 5, the spraying of the liquid 7 by the elastic diaphragm 4 is turned on / off, and the spray amount is increased or decreased. As a result, the liquid 7 stored in the tank 3 is sprayed from the liquid supply port 33 through a large number of micro holes in the elastic diaphragm 4. At this time, the atmospheric pressure in the tank 3 varies due to spraying. As a result, the spray becomes unstable due to fluctuations in atmospheric pressure, and air flows from the micropores of the elastic diaphragm 4 during spraying, which also makes the spray unstable.

  Here, in the present embodiment, the cylindrical protrusion 31 of the tank 3 is formed with a hole 30 that communicates the inside and the outside of the tank 3. This hole 30 is formed on the cylindrical protrusion 31 side at the upper end of the liquid holding part 32 in the tank 3. The hole diameter of the air holes 30 is larger than the diameter of the micro holes of the elastic diaphragm 4.

  For this reason, even if the liquid 7 is ejected from the micropores of the elastic diaphragm 4 due to the ultrasonic vibrations by the elastic diaphragm 4 and the atmospheric pressure inside the tank 3 fluctuates, the external air remains in the tank 3 via the holes 30. Supplied inside. As a result, the balance of atmospheric pressure can be maintained inside and outside the tank 3. Therefore, according to the liquid spraying apparatus 1 of the present embodiment, even if the liquid 7 is ejected from the microholes of the elastic diaphragm 4, air is mixed from the microholes of the elastic diaphragm 4 and minute inside the tank 3. No bubbles are generated. Therefore, in the liquid spray apparatus 1, the spray of the liquid 7 is stabilized.

  Moreover, since the hole diameter of the hole 30 is formed larger than the hole diameter of the minute hole of the elastic diaphragm 4, the external air is dominant from the hole 30 than the minute hole of the elastic diaphragm 4 ( (Preferentially) will be supplied into the tank 3. Thereby, spraying of the liquid 7 becomes more stable.

  The above operations and effects have been proved by spray experiments in the examples described later.

  In the configuration of FIG. 1, the position of the hole 30 is the position on the cylindrical protrusion 31 side in the tank 3. When the position of the hole 30 is a position opposite to the cylindrical projecting portion 31 in the tank 3, when the liquid 7 such as a cosmetic liquid is injected from the liquid supply port 33, the injected liquid 7 is exposed from the hole 30 to the outside. There is a risk of leakage.

  In the configuration of FIG. 1, the hole 30 is located at the upper end of the liquid holding unit 32. However, the position of the hole 30 is not limited to the position of FIG. 1, and may be at a position above the liquid level of the liquid 7 stored in the tank 3 when the tank 3 is attached to the case 2. Even at such a position of the hole 30, when the liquid 7 is ejected from the microhole of the elastic diaphragm 4 by the ultrasonic vibration by the elastic diaphragm 4, the external air passes through the hole 30. It is supplied to the inside and the balance of atmospheric pressure can be maintained inside and outside the tank 3.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted. FIG. 3 is a perspective view showing the configuration of the tank 3 provided in the liquid spraying apparatus 1 according to the present embodiment, viewed from the liquid supply port side.

  As shown in FIG. 3, a raised portion 34 is formed on the cylindrical projecting portion 31 side of the upper end of the liquid holding portion 32 in the tank 3. The raised portion 34 has a structure raised in the direction in which the cylindrical protruding portion 31 protrudes. The hole 30 is formed in the raised portion 34. The inner wall of the liquid holding part 32 is raised toward the cylindrical projecting part 31 at the position of the raised part 34. That is, in the liquid holding part 32, a space is secured in the portion of the raised part 34 inside.

  According to the configuration of the liquid spraying apparatus 1 of the present embodiment, when the liquid 7 is injected into the tank 3, the risk of the liquid 7 leaking outside through the holes 30 is reduced. When the tank 3 is filled with the liquid 7, the liquid 3 such as a cosmetic liquid is injected from the liquid supply port 33 after the liquid supply port 33 faces the tank 3. At this time, the liquid 7 is filled until it comes into contact with the inner wall of the liquid holding portion 32 on the cylindrical projecting portion 31 side. Here, since the air holes 30 are formed in the raised portions 34, they are always located above the liquid surface of the liquid 7 (on the cylindrical projecting portion 31 side). Therefore, the risk of the liquid 7 leaking from the holes 30 to the outside of the tank 3 during the filling operation of the liquid 7 into the tank 3 is reduced.

  Further, when the tank 7 is filled with the liquid 7, the user may accidentally press the tank 3 strongly with a finger. In such a case, the liquid level of the liquid 7 inside the tank 3 rises and the liquid 7 may leak from the hole 30 to the outside of the tank 3. However, according to the liquid spraying apparatus 1 of the present embodiment, since the space is secured in the raised portion 34 inside the liquid holding unit 32, even if the user accidentally strongly presses the tank 3 with a finger, the liquid 7 There is room for the liquid level to rise by the amount of space formed in the raised portion 34. The liquid level of the liquid 7 entering the raised portion 34 is always equal to the liquid level of the liquid 7 entering the cylindrical protrusion 31. For this reason, even if the user accidentally presses the tank 3 strongly with a finger, the risk that the liquid 7 leaks from the hole 30 to the outside of the tank 3 is reduced.

[Embodiment 3]
The following will describe still another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted. FIG. 4 is a perspective view showing the configuration of the tank 3 provided in the liquid spraying apparatus 1 according to the present embodiment, as viewed from the liquid supply port side.

  As shown in FIG. 4, a thick portion 35 is formed on the cylindrical projecting portion 31 side of the upper end of the liquid holding portion 32 in the tank 3. The thick portion 35 has a structure that rises in the direction in which the cylindrical protruding portion 31 protrudes. The holes 30 are formed in the thick part 35. In the liquid holding part 32, the thickness of the wall part in the thick part 35 is larger than the thickness of the other wall parts. For this reason, the air holes 30 penetrating the thick portion 35 are longer than those in the first and second embodiments. It can be said that the thick portion 35 has a configuration in which the film thickness in the above-described raised portion 34 is larger than the surrounding film thickness.

  As described above, as a method for increasing the thickness of only the portion where the hole 30 is formed in the tank 3 to increase the thickness, for example, the following method can be cited. That is, first, before the tank 3 is blow-molded, a plate for thickening (the same material as the tank 3) is set in advance in a blow-molding die. Thereafter, the tank 3 is blow-molded using this blow-molding die. In this case, the air holes 30 are formed after blow molding.

  According to the configuration of the liquid spraying apparatus 1 of the present embodiment, the risk of the liquid 7 leaking to the outside through the air holes 30 is reduced against unexpected pressing and tilting of the tank 3. When the filling of the liquid 7 into the tank 3 is completed, the liquid level of the liquid 7 comes into contact with the inner wall side of the tank 3 in the hole 30. Since the holes 30 formed in the thick part 35 have a relatively large length, the flow path resistance is large. Therefore, the risk of the liquid 7 leaking to the outside through the air holes 30 with respect to the pressing and tilting of the tank 3 is reduced.

  From the above, when the essential points of the liquid spraying apparatus 1 according to the present invention are summarized, a hole 30 that communicates the inside and the outside of the tank 3 is formed in the cylindrical protrusion 31 side portion of the tank 3. Is at a position above the liquid level of the liquid 7 stored in the tank 3. As a result, it is possible to provide the liquid spraying apparatus 1 that is free from leakage of the liquid 7, is inexpensive, and is rich in spraying stability.

[Summary]
The liquid spraying apparatus 1 according to the first aspect of the present invention includes a tank 3 including a liquid supply port 33 and a protruding portion (cylindrical protruding portion 31) formed to protrude and a liquid holding portion 32 for holding liquid, and a case 2, an elastic diaphragm 4 that is supported by the case 2 and has a large number of micropores attached to the liquid supply port 33, and an ultrasonic vibrator 5. A liquid spraying apparatus 1 that ultrasonically vibrates a plate 4 to spray the liquid 7 stored in the tank 3 from a liquid supply port 33 through a large number of microholes in the elastic vibration plate 4, wherein the protrusions in the tank 3 On the (cylindrical protruding portion 31) side portion, a hole 30 is formed to communicate the inside and the outside of the tank 3, and the hole 30 is more than the liquid level of the liquid 7 stored in the tank 3. It is in the upper position.

  According to the above configuration, the liquid spraying apparatus 1 causes the elastic vibrator 4 to be ultrasonically vibrated by the ultrasonic vibrator 5, and causes the liquid 7 stored in the tank 3 to be supplied from the liquid supply port 33 to the large number of elastic vibration plates 4. Spray through the micropores. In this case, the degree of negative pressure in the tank 3 varies due to spraying. As a result, the spray becomes unstable due to fluctuations in the degree of negative pressure, and air also flows from the micropores of the elastic diaphragm 4 during spraying, which also makes the spray unstable.

  Here, according to the above configuration, a hole 30 that communicates the inside and the outside of the tank 3 is formed in the portion of the tank 3 on the side of the protruding portion (tubular protruding portion 31). Reference numeral 30 denotes a position above the liquid level of the liquid 7 stored in the tank 3. For this reason, even if the liquid 7 is ejected from the micropores of the elastic diaphragm 4 due to the ultrasonic vibrations by the elastic diaphragm 4 and the atmospheric pressure inside the tank 3 fluctuates, the external air remains in the tank 3 via the holes 30. The pressure is supplied to the inside, and the balance of atmospheric pressure is maintained inside and outside the tank 3. Therefore, according to the above configuration, even if the liquid 7 is ejected from the micropores of the elastic diaphragm 4, air is mixed from the micropores of the elastic diaphragm 4 and microbubbles are not generated inside the tank 3. Therefore, the spray of the liquid 7 is stabilized.

  As mentioned above, according to said structure, the liquid spraying apparatus 1 which can stabilize spraying with a simple structure at low cost can be provided.

  The liquid spray apparatus 1 according to the second aspect of the present invention may be configured such that, in the first aspect, the holes 30 are formed at the upper end of the liquid holding part 32. Thereby, spraying of the liquid 7 can be reliably stabilized.

  In the liquid spraying apparatus 1 according to aspect 3 of the present invention, in the above aspect 1 or 2, the hole diameter of the hole 30 is preferably formed larger than the hole diameter of the microhole of the elastic diaphragm 4.

  According to the above configuration, since the hole diameter of the hole 30 is formed larger than the hole diameter of the minute hole of the elastic diaphragm 4, the external air is more void than the hole of the elastic diaphragm 4. From the inside (preferentially) into the tank 3. Thereby, according to said structure, spraying of the liquid 7 is stabilized more.

  In the liquid spraying apparatus 1 according to Aspect 4 of the present invention, in any one of Aspects 1 to 3, the protruding portion (cylindrical protruding portion 31) protrudes from the protruding portion (cylindrical protruding portion 31) side portion. It is preferable that a raised portion 34 that is raised in the direction to be formed is formed, and the hole 30 is formed in the raised portion 34.

  By the way, when the liquid 7 is injected into the tank 3, the risk of the liquid 7 leaking outside through the holes 30 is reduced. When the tank 3 is filled with the liquid 7, the liquid 3 such as a cosmetic liquid is injected from the liquid supply port 33 after the liquid supply port 33 faces the tank 3. At this time, the liquid 7 is filled until it comes into contact with the inner wall of the liquid holding portion 32 on the cylindrical projecting portion 31 side.

  Here, according to said structure, the protruding part (tubular protrusion 31) side part is formed with the protruding part 34 which protruded in the direction which the said protrusion (cylindrical protrusion 31) protrudes. Since the air holes 30 are formed in the raised portions 34, they are always located above the liquid surface of the liquid 7 (on the cylindrical projecting portion 31 side). Therefore, according to the above configuration, the risk of the liquid 7 leaking from the hole 30 to the outside of the tank 3 during the filling operation of the liquid 7 into the tank 3 is reduced.

  In addition, in the liquid spray device 1 according to aspect 5 of the present invention, in the aspect 4, it is preferable that the raised portion 34 constitutes a thick portion 35 having a film thickness larger than the surrounding film thickness.

  According to said structure, since the said protruding part 34 comprises the thick part 35 in which the film thickness was larger than the surrounding film thickness, the void | hole 30 which penetrates this thick part 35 is comparatively long. Is getting bigger. When the filling of the liquid 7 into the tank 3 is completed, the liquid level of the liquid 7 comes into contact with the inner wall side of the tank 3 in the hole 30. At this time, since the air holes 30 formed in the thick portion 35 have a relatively large length, the flow path resistance is large. Therefore, the risk of the liquid 7 leaking to the outside through the air holes 30 with respect to the pressing and tilting of the tank 3 is reduced.

  The cosmetic liquid spraying apparatus according to the fifth aspect of the present invention includes the liquid spraying apparatus 1 according to any one of the first to fourth aspects.

  According to said structure, the cosmetic liquid spraying apparatus which can stabilize spraying with a simple structure at low cost can be provided.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  About the liquid spraying apparatus 1 of this Embodiment, in order to verify the effect of the hole 30, the spraying experiment was done. The spray experiment will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing a configuration of the tank 3 in the liquid spraying apparatus 1 according to the embodiment and a state when the liquid 7 is supplied and stored in the tank 3 before being attached to the case 2. FIG. 6 is a cross-sectional view showing a configuration of a liquid spray device 80 according to a comparative example. In this example, an experiment was performed using the liquid spraying apparatus 1 shown in FIG. Further, as a comparative example, a spraying experiment was also performed on the liquid spraying device 80 in which the holes 30 were not formed in the tank 3.

In this embodiment, the holes 30 formed in the tank 3 are formed by a carbon dioxide (CO ₂ ) laser, and the diameter size of the holes 30 is 180 μm. Further, as shown in FIG. 6, the liquid spray device 80 according to the comparative example has the same configuration as the liquid spray device 1 except that the holes 30 are not formed in the tank 3.

  The spraying experiment was performed according to the following procedure.

  First, as shown in FIG. 5, in the comparative example and the example, 3 g of the liquid 7 made of cosmetic liquid was stored in the tank 3 and set in the case 2 of the liquid spraying device 1 and the liquid spraying device 80. Next, the ultrasonic vibrator 5 which is controlled by a switch (not shown) and energized is ultrasonically vibrated to vibrate the elastic vibration plate 4, and the liquid generated from the micropores of the elastic vibration plate 4 is caused by the pressure generated accordingly. 7 was sprayed 3 times for 30 seconds each. The spray results were as shown in Table 1 below.

  As a result, in the comparative example, there is no spray stability and the spray amount is as small as 0.38 g to 0.52 g, whereas in the example, the spray amount is as large as 0.68 g to 0.71 g. I found out that

  Thus, in the liquid spraying apparatus 1 of the embodiment, the air holes 30 communicating with the inside of the tank 3 and the outside of the tank 3 are formed on the upper end portion of the tank 3 and on the cylindrical projecting portion 31 side. The size of the hole 30 is larger than the size of the microhole of the elastic diaphragm 4 and is formed outside the packing 6 that covers a part of the cylindrical protrusion 31 of the tank 3. That is, the air holes 30 are not blocked by the packing 6. As a result, when the atmospheric pressure in the tank 3 fluctuates due to spraying, air is supplied from the air holes 30 as shown in FIG. 1, and the balance between the atmospheric pressure inside and outside the tank 3 can be maintained. However, as shown in FIG. 7, in the liquid spraying device 80 of the comparative example, air is mixed from the micropores of the elastic diaphragm 4, and microbubbles are generated inside the liquid 7 of the tank 3. It becomes. From the above, it was possible to confirm the spray stability in the liquid spray apparatus 1 of the example.

  In addition, it was confirmed that there was no leakage of the liquid 7 from the micropores and the holes 30 when the surface tension of the liquid 7 was generated with the micropore diameter size of the elastic diaphragm 4 and the diameter size of the holes 30. .

  The present invention relates to a liquid spraying device and a cosmetic liquid spraying device that sprays liquid stored in a tank by ultrasonically vibrating an elastic vibration plate with an ultrasonic vibrator through a large number of pores of the elastic vibration plate from a liquid supply port. Applicable. Moreover, as a liquid of a liquid spraying apparatus, it can be applied not only to a cosmetic liquid but also to a chemical liquid for preventing bad breath, a chemical liquid sprayed on a wound or sprain, and other liquid spraying apparatuses.

DESCRIPTION OF SYMBOLS 1 Liquid spraying apparatus 2 Case 3 Tank 4 Elastic diaphragm 5 Ultrasonic vibrator 6 Packing 7 Liquid 30 Hole 31 Cylindrical protrusion (protrusion)
32 Liquid holding part 33 Liquid supply port 34 Raised part 35 Thick part

Claims (5)

A tank having a liquid supply port and a protruding portion formed to protrude and a liquid holding portion for holding liquid, a case, and an elastic body having a large number of micropores supported by the case and attached to the liquid supply port A vibration plate and an ultrasonic vibrator are provided. The elastic vibration plate is ultrasonically vibrated by the ultrasonic vibrator, and the liquid stored in the tank is sprayed from a liquid supply port through a large number of holes in the elastic vibration plate. A liquid spraying device,
The projecting portion side portion of the tank has a hole that communicates the inside and outside of the tank, and the hole is located above the liquid level of the liquid stored in the tank. A liquid spraying device characterized by the above.   The liquid spraying device according to claim 1, wherein the hole is formed in an upper end portion of the liquid holding portion.   3. The liquid spraying apparatus according to claim 1, wherein a hole diameter of the hole is formed larger than a hole diameter of the micro hole of the elastic diaphragm. The protruding portion side portion is formed with a protruding portion protruding in the direction in which the protruding portion protrudes,
The liquid sprayer according to claim 1, wherein the hole is formed in the raised portion. A cosmetic spraying device comprising the liquid spraying device according to any one of claims 1 to 4.

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