JP2003070914A - Atomizing head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact atomizing head capable of stably atomizing various drug solution in an optional direction. SOLUTION: The atomizing head is provided with an ultrasonic vibrator transducer which is composed of a resonator for amplifying the minute displacement of a group of piezoelectric elements (ultrasonic vibration generation means) provided on the side of a proximal end and transmitting it to the side of a distal end to generate the ultrasonic vibration of a longitudinal vibration mode. An imperforated diaphragm 57 (ultrasonic vibration means) is provided on the side of the distal end of the resonator of this ultrasonic vibrator transducer and which resonates and vibrates with the ultrasonic vibration of the ultrasonic vibrator transducer for atomizing the drug solution (liquid) fed from a liquid reservoir. The imperforated diaphragm 57 is constituted by performing surface processing 71 obtained by combining a water-repelling side 81 as a first surface area and a hydrophilic side 82 as a second surface area to the full surface of this atomizing surface.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Spray head that atomizes and sprays liquid by ultrasonic vibration
About. [0002] In recent years, spraying apparatuses have been used for medical or industrial purposes.
Widely used for The above spray device atomizes liquid
And a spray head for spraying. Above spray head
Is described in, for example, JP-A-5-228410.
Liquid is atomized and sprayed by ultrasonic vibration as
It has been proposed. [0003] The above-mentioned spray head is shown, for example, in FIG.
It is configured as follows. FIG. 10 shows a conventional spray head.
FIG. [0004] As shown in FIG.
A through hole 102 is formed at the center of the horn 101,
A diaphragm 103 which is a radiation part so as to communicate with the through hole 102
Is formed with an injection hole 104. In addition, the spray head
100 is behind a horn 101 with a liquid supply connection 10
5 and the periphery of the liquid supply connection portion 105.
An ultrasonic vibrator 106 is mounted behind the horn 101
ing. This ultrasonic vibrator 106 has a lead wire 107
Connected, and a drive (not shown)
A drive signal is supplied from a circuit. [0005] Further, the spray head 100 is provided with the liquid
Connect the hose 108 to the supply connection 105 and
A pump (not shown) is connected to the hose 108 to supply the liquid.
It is configured to be payable. [0006] The spray head 100 is
Pump from the liquid supply connection 105 to the horn
Injection of the diaphragm 103 through the through hole 102 of 101
The liquid is supplied to the hole 104 and the ultrasonic vibrator
The diaphragm 103 is driven by ultrasonic vibration by driving the
So that the liquid is atomized and sprayed from the injection hole 104.
It has become. [0007] The conventional spray head configured as described above.
Is provided with liquid supply means on the front surface of the diaphragm 103.
There is an advantage that the configuration is simplified because there is no such a device. SUMMARY OF THE INVENTION
The conventional spray head is located at the center of the ultrasonic vibrator 106.
A liquid supply connection portion 105, the ultrasonic vibrator
The through hole 102 is formed at the center of the
I have. For this reason, the conventional spray head 100 is inevitable.
Ultrasonic vibration is almost at the center of the diaphragm 103
It is possible to atomize the liquid in this center without generating
Can not. Therefore, the conventional spray head 100 described above
Spraying cannot be performed using the entire surface of the diaphragm 103.
Therefore, there is a problem that the atomization efficiency is poor. Further, the above-mentioned conventional spraying head 100 is
Optimizing liquid level management, which is the most important when performing
Is difficult. [0010] The above-mentioned conventional spray head 100 is a liquid mist.
Liquid must be supplied to the diaphragm in an optimal condition
If so, it is impossible to atomize the liquid. Where the liquid
The optimal state of the body is the liquid supplied to the diaphragm 103.
That is, the film thickness becomes uniform. The above conventional spray head
100 is very severe in liquid film thickness management,
Not only makes the atomization of the
Is difficult. Further, the conventional spray head 100 has a liquid
The surface management depends on the liquid characteristics, and the liquid film thickness is controlled
Must be surface-treated according to the characteristics of each liquid
There is. The above-mentioned surface treatment is performed, for example, on a liquid having a high contact angle.
When using a body, an ultrasonic wave is used to reduce the liquid film thickness.
It is necessary to apply a hydrophilic treatment or the like to the radiation surface. Conversely, the above surface
When using a liquid with a low contact angle,
Must be subjected to a water-repellent treatment in order to obtain an optimum thickness. Here, considering medical use in the human body,
The spray volume and particle size of the liquid chemical used are
・ Depends on the part to which the human body is applied, and more chemicals are used
Those with some liquid properties may be used. Ma
In addition, the management of the liquid film on the diaphragm is also important in the direction of atomization.
It becomes important. The present invention has been made in view of these circumstances.
It can spray various chemicals stably and is optional
To provide a small spray head capable of spraying
Aim. [0015] To achieve the above object,
The present invention atomizes and sprays a liquid based on ultrasonic vibration
In the spray head, the liquid is supplied from a predetermined liquid supply means.
Has a surface property in which the contact angle with the liquid is the first contact angle
Supplied from a first surface area and predetermined liquid supply means
A surface property in which the contact angle with the liquid is different from the first contact angle
Having a second surface region having a predetermined ultrasonic vibration
The first and the second based on the ultrasonic vibration generated by the raw means
Ultrasonic vibration means to atomize the liquid supplied to the surface area
It is characterized by having. [0016] With this configuration, various chemical solutions can be stably and reliably supplied.
Realizes a small spray head that can spray in any direction
You. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
An embodiment will be described. 1 to 9 show one embodiment of the present invention.
FIG. 1 shows an embodiment of the present invention.
FIG. 2 is an overall configuration diagram showing a medical spray system, and FIG.
FIG. 3 is an explanatory view showing the distal end side of the catheter, and FIG.
FIG. 4 is a front view of the exterior of the catheter viewed from the direction A. FIG.
Explanatory drawing showing the rear end side of the mist catheter, FIG.
FIG. 6 is an explanatory sectional view showing the distal end side of the catheter, and FIG.
Sectional explanatory view showing the vicinity of the piezoelectric element group of the mist catheter, FIG.
5 is a sectional view taken along the line BB of FIG. 5, and FIG. 8 shows the spray head of FIG.
FIG. 9 is a cross-sectional configuration diagram, and FIG. 9 is a non-porous diaphragm subjected to a surface treatment.
FIG. 9A is an explanatory view showing an atomized surface of FIG.
The water-repellent coating film in a thin line shape in the horizontal direction
FIG. 9B is an explanatory view showing the atomized surface of the non-porous diaphragm in the case.
Cuts the water-repellent coating film into a thin line only in the vertical direction
FIG. 7 is an explanatory diagram showing an atomized surface of a non-porous diaphragm in a case where the diaphragm is not used. In the present embodiment, a medical spray device,
The present invention is applied to a medical spray device used for bronchial treatment.
Will be explained. FIG. 1 shows a first embodiment of the present invention.
A medical spray system 1 having a state is provided with an endoscope device 2 and a medical
Spraying device (hereinafter simply referred to as a spraying device) 3 and a respirator 4
It is composed of The medical spray system according to the present embodiment
The system 1 is configured to be combined with the endoscope device 2.
However, the system can be configured only with the spray device 3. The endoscope apparatus 2 includes an image pickup means (not shown).
Endoscope (hereinafter referred to as an endoscope) 2a having a light source device
(Not shown) and video processor (not shown)
Connected to. The endoscope device 2 includes the light source
Illumination light is supplied from the device to the endoscope 2a to
Light up. The illuminated subject image is inserted into the endoscope 2a.
It is taken in from the leading end of the
You. The video processor includes an imaging device of the endoscope 2a.
Process image signals from the device with a signal processing circuit (not shown)
And transmits it to a monitor (not shown) to display the endoscope image.
It has become so. The spraying device 3 is a thin device that can be inserted into bronchi.
Ultrasonic vibration is provided on the distal end side of the long and flexible flexible tube 10.
Spray head 1 for atomizing and spraying liquid chemicals
1A and a spray catheter 11
Control device 12 for controlling the spray head 11A of the nozzle 11
It is mainly composed of The nebulizing catheter 11 is connected to the flexible tube 1
The connector portion 13 extends to the rear end side of the “0”. This
The connector 13 is connected to a drive signal line via a relay connector 14.
15 and liquid supply tube 16 are detachably connected
, And is connected to the control device 12. Further, the nebulizing catheter 11 can be
The outer circumference of the flexible tube 10 is taped from the proximal end side of the spray head 11A.
It is covered with an outer tube 17 such as Freon (registered trademark).
You. The outer tube 17 is provided on the rear end side of the flexible tube 10.
The flexible tube 10 is fixed to the
The positioning is fixed. These outer tubes 17 and
The screw fixing portion 18 is provided at the tip of the nebulizing catheter 11.
Centering hand to position the end side in the center of the lumen
Constitutes a stage. This centering means will be described later.
You. The nebulizing catheter 11 and the endoscope 2
a is inserted into the tracheal tube 21 and led out into the bronchi.
It is supposed to be. The tracheal tube 21 is placed outside the body cavity.
A pressure sensor 23 is connected to an airway 22 which is a connection portion provided.
Is provided. The tracheal tube 21 is connected
The ventilator 4 is connected via a tube 24.
You. Further, the tracheal tube 21 is connected to the distal end side with a body cavity.
A balloon 25 for fixing the inside is provided.
In addition, this tracheal tube 21 is generally used.
Since it is a tracheal tube, detailed description is omitted. The pressure sensor 23 is connected to the controller 12
Are connected by a signal line 23a. This pressure sensor 23
Detects the pressure at the time of inspiration and expiration by the respirator 4
Then, a sensor signal is output to the control device 12.
ing. The pressure sensor 23 detects the dark value of the detected pressure.
At the time of pressure rise and fall by the respirator 4, that is,
The dark value at the start and end of intake can be set separately.
You. The pressure sensor 23 is an amplifier-separated type digital or
Is an analog pressure sensor. The pressure sensor 23 includes:
The control device 12 detects the timing of the spray / liquid feed drive.
It is also possible to put out. Therefore, the controller 12
Is based on a sensor signal from the pressure sensor 23,
The spray head 11A can be controlled. By this
In the present embodiment, the control device 12 and the artificial call
Timing at the time of inspiration and expiration without connecting to the inhaler 4
It is possible to perform the spraying of the chemical solution according to the time. The control device 12 includes the nebulizing catheter.
11 to the spray head 11A.
A driving circuit 31 for outputting and driving, and the spray head 11
A, and a liquid sending section 32 for supplying a chemical solution to A.
A liquid feed drive unit 33 that moves,
Solenoid valve 34 for controlling supply, and control unit for controlling these
35. In addition, the control device 12
By operating the operation panel 36 having switches (not shown)
The control unit 35 and the drive circuit 31 are controlled.
It has become. The control unit 35 is, for example, a professional
The drive circuit 31 is a grammable controller.
The liquid supply section 32, the liquid supply drive section 33, and the solenoid valve 34
It has a built-in program for controlling. The control unit 35 detects whether the pressure sensor 23
These sensor signals and operation signals from the operation panel 36
Based on the above, a liquid sending start or stop signal is sent to the liquid sending driving unit 33.
Is output. The liquid sending drive unit 33 includes:
Based on the signal from the control unit 35, to the liquid sending unit 32
A drive signal is output. The liquid sending section 32
Is driven by a drive signal from the liquid sending drive unit 33,
The liquid medicine is supplied to the nebulizing catheter 11.
You. At this time, the control unit 35 opens the solenoid valve 34.
A close signal is output to control the supply of the chemical. In addition, before
The electromagnetic valve 34 is configured to stop the liquid supply from the liquid supply unit 32 when the liquid supply is stopped.
This is to prevent the liquid from being supplied too much.
You. Further, a plurality of the solenoid valves 34 may be provided. The liquid sending section 32 detects the remaining amount of the chemical solution.
Equipped with a limit sensor (not shown) to reduce
Output a limit detection signal to the control unit 35
It has become so. Further, the control unit 35 includes the pressure sensor
23 and the operation from the operation panel 36.
Based on the operation signal or the limit detection signal from the liquid sending section 32.
Output a spray start or stop signal to the drive circuit 31
It is supposed to. The drive circuit 31 includes the spray head 11
The current value of the drive signal (alternating voltage) output to A is not shown.
Current detection means. Said
The drive circuit 31 detects a leak or disconnection by the current detecting means.
Output an emergency stop signal to the control unit 35
As well as shutting down. Ma
In addition, the drive circuit 31 is a diagram showing the operation panel 36.
No pressing of the emergency stop button causes the control
An emergency stop signal is output to 35. Next, the detailed structure of the nebulizing catheter 11 will be described.
Will be described. First, referring to FIG. 2 to FIG.
Center for positioning the tip side of tell 11 in the lumen
A description will be given of the rolling means. As shown in FIG. 2 and FIG.
The tel 11 is cut near the tip of the outer tube 17.
And divide it into four parts to form the centering part 41.
Has formed. Then, as shown in FIG.
When the screw fixing portion 18 is shifted toward the distal end with respect to
The tip of the outer tube 17 is the spray head 11A.
This is formed at a connecting portion 42 between the flexible tube 10 and the distal end portion.
The flexible tube 10 is stopped by the contact portion 42a (see FIG. 5).
In contrast, the center ring portion 41 becomes
It expands in the direction. Here, the outer tube 17 is
The position of the flexible tube 10 with respect to the flexible tube 10 is determined by the fastening portion 18.
By being fixed and fixed, the outside of the center ring portion 41 is
The outward extension is fixed. This allows
The distal end side of the nebulizing catheter 11 has a lumen in the bronchus.
It is positioned at the center and sprayed from the spray head 11A.
The target solution does not adhere to the luminal wall in the bronchi
It is possible to reach the site. Next, referring to FIG. 5 to FIG.
The configuration of the tip side of the tell 11 will be described. As described above, the nebulizing catheter 11
The spray head 11A on the distal end side of the flexible tube 10.
It is provided with. As shown in FIG. 5, the spray head 11A
Is polarized in the thickness direction as ultrasonic vibration generating means.
The piezoelectric elements 51a so that the polarization directions are alternately opposed.
Element group 51 and a plurality of piezoelectric element groups 5
1 made of a stainless steel resonator 52 for amplifying the minute displacement.
The ultrasonic vibrator 53 to be formed and the ultrasonic vibrator 53
The large-diameter portion 52a on the proximal end side of the resonator 52 so as to cover the outer periphery.
And a resin-made cylindrical tube 54 fixed to the outer peripheral side surface of
Have been. The spray head 11A covers the spray side.
A resin spray head cover is
-55 is provided. In addition, this spray head cover 5
5 may be formed integrally with the cylindrical tube 54. The rear end side of the spray head 11A is outside.
It is held and fixed to the mounting member 56. This exterior member 56
Is connected and fixed at its rear end by the connecting portion 42.
You. The connecting portion 42 is located on the distal end side of the outer tube 17.
A contact portion 42a with which the end face contacts is formed. Mentioned above
As described above, the distal end side of the outer tube 17 is
2a so as to be stopped. The resonator 52 of the spray head 11A
Can be used as ultrasonic vibration means, for example, stainless steel
The 0.05mm thick disc-shaped non-porous diaphragm 57
Bonded and fixed. Before facing the non-porous diaphragm 57
The inner peripheral surface side of the cylindrical tube 54 is the vertical
Protects against contact of the non-porous diaphragm 57 in the vibration mode
Protection member 58 is provided. The resonator 52 includes a large-diameter portion 52 on the base end side.
a, for example, a chemical solution supply / discharge pipe 59 having an inner diameter of 0.3 mm.
Is inserted and fixed. This chemical supply and discharge pipe 5
9 is covered with a chemical tube 61 and the relay
It extends to the connector 14. The piezoelectric element group 51 includes a fixed holding member 62.
Is held in. 6 and FIG.
Drive to the electrodes of each piezoelectric element 51a as shown in FIG.
The signal line 63 is connected. These drive signal lines 63
The other end is joined by a heat shrinkable tube 64 and
To the relay connector 14
I have. The connection portion 42 is connected to the base end side of the connection portion 42.
The distal end portion 10a of the flexible tube 10 heats the outer sheath 67.
With the contraction tube 68 and the extending portion 42b of the connecting portion 42
And the outer periphery thereof is fixed with a metal ring 69.
You. Next, referring to FIG.
A detailed configuration will be described. The ultrasonic transducer 53 includes the piezoelectric element group
The front end face of the front end 51 has a large diameter portion 52 on the base end side of the resonator 52.
The piezoelectric element group 51 is bonded and fixed to the end face
And is integrally formed with the container 52. At this time,
The vibrator 52 is configured to conduct to the negative pole. The piezoelectric element 51a is polarized in the thickness direction.
Silver or nickel on both end surfaces.
The respective nickel electrodes are patterned. The pressure
The electric element 51a has, for example, a thickness of 0.2 mm and an outer diameter of 2 mm.
It is a 2 mm square shape. The piezoelectric element 51a has, for example, a polarization direction
Are stacked so that the piezoelectric element groups 51 face each other.
Has formed. In the present embodiment, the piezoelectric element is
The piezoelectric element group 51 is configured by laminating the
Increase the amplitude to increase the spray volume,
If the number is reduced, the frequency will be higher and the particle size will be finer
Needless to say, this is achieved. The piezoelectric element 51a has ten poles and a minus pole in front.
The drive signal line 63 is connected to a lead wire.
Incidentally, the piezoelectric element 51a has ten poles and a negative pole not shown.
Connected to the drive signal line 63 via a flexible substrate
It may be. Further, a wiring connection is provided between the piezoelectric elements 51a.
An electrode plate (not shown) may be installed to facilitate connection.
No. The piezoelectric signal is transmitted through these drive signal lines 63.
The element 51a is a sine wave intermittent from the drive circuit 31.
Alternatively, drive the square wave drive signal to a predetermined voltage, frequency, and pulse number.
Is applied to cause minute displacement. Then, the spray head 11A is
The ultrasonic vibration generated in the element group 51 causes the resonator
52 is excited in the longitudinal vibration mode in the longitudinal axis direction,
The chemical solution stored in the liquid part is sprayed on the side of the non-porous diaphragm 57
From the spray side of the non-porous diaphragm 57
And spray it. The resonator 52 includes a large-diameter portion 52 on the tip side.
b, a concave portion 70a is formed, and only at the outer peripheral end surface
The non-porous diaphragm 57 is fixedly joined. By this
Thus, the resonator 52 is formed by the concave portion 70a.
Vibration displacement of non-porous diaphragm 57 causes attenuation due to chemical contact
Voltage value applied to the piezoelectric element group 51
Can be easily sprayed even with small values,
By applying a high voltage, a higher viscosity
Contains low surface tension chemicals or relatively large dispersed particles
Chemical solution can be sprayed. The non-porous diaphragm 57 includes:
A surface treatment 71 described later is performed. In addition, the tip side large
The end surface of the diameter portion 52b is not subjected to the surface treatment 71.
No. The resonator 52 includes a large-diameter portion 52 on the distal end side.
b and a small-diameter portion 52c between the base-side large-diameter portion 52a.
The small diameter portion 52c is formed in an empty space communicating with the concave portion 70a.
The intermediate portion 70b is formed up to the base end side large diameter portion 52a.
You. The resonator 52 has, for example, a total length of 6 mm and
The outer diameter of the end-side large-diameter portion 52a is approximately φ4 mm,
52b is approximately 3 mm in outer diameter, and the small diameter portion 52c is approximately φ in outer diameter.
The diameter is 0.8 mm and the inner diameter is approximately 0.5 mm. As a result, the resonator 52 is
The cross-sectional area is reduced by the small diameter portion 52c. others
Therefore, the resonator 52 is generated in the piezoelectric element group 51.
The expansion rate of the vibration amplitude that excites the resonance with minute displacement is improved,
Larger amplitude than the cylindrical resonator 52
You. Further, the resonator 52 is formed at a vibration antinode position.
The distal-side large-diameter portion 52b has an additional mass.
Large deformation at the connection part 52d between the part 52b and the small diameter part 52c
Is to attract. As a result,
The vibrator 52 is provided at an outer peripheral portion of the large-diameter portion 52b on the distal end side (non-porous diaphragm).
57 at the outer peripheral portion).
Is excited, and a bending vibration is generated together with the non-porous diaphragm 57.
Do. As a result, the non-porous diaphragm 57 is provided with the resonator
52, and a large-amplitude vibration is excited so that the resonator 5
2 near the center of the tip-side large-diameter portion 52b.
The width can be obtained. As described above, the size of the resonator 52 on the base end side is large.
The diameter portion 52a is formed by bonding the cylindrical tube 54 to the outer peripheral side surface.
Is defined. As a result, the small diameter of the resonator 52
Between the outer circumference of the portion 52c and the inner diameter of the cylindrical tube 54,
A distal end opening of the chemical supply / discharge pipe 59 is provided.
Liquid storage for storing the chemical supplied from the supply / discharge pipe 59
A portion 72 is formed. The cylindrical tube 54 is connected to the front end surface by
Longer axis than the end face of the large-diameter portion 52b on the tip side of the resonator 52
It is formed to be several hundred μm long. The cylinder
The pipe 54 has the inner diameter and the outer circumference of the tip-side large-diameter portion 52b.
Annular gap (or annular spray gap)
) The coaxial assembly is made so that 73 is about several hundred μm.
Is done. The spray head 11 configured as described above
A is supplied with a chemical from the chemical supply and discharge pipe 59, and
The liquid is stored in the storage part 72. And the spray head 1
1A is a driving signal from the driving circuit 31 as described above.
Is applied, the piezoelectric element group 51 is slightly displaced,
The resonator 52 is excited in the longitudinal vibration mode in the longitudinal direction, and
The non-porous diaphragm 57 is excited by resonance to excite large amplitude vibration and
It vibrates in bending. The liquid medicine stored in the liquid storage section 72 is
It is supplied onto the non-perforated diaphragm 57 through the annular gap 73.
You. Then, the chemical solution on the non-porous diaphragm 57 is subjected to non-porous vibration.
The bending vibration of the plate 57 causes
The capillary wave is excited, and the capillary wave
A large amount of the chemical is atomized from the entire surface of the hole diaphragm 57, and
It is to be sprayed and sprayed. Here, considering medical use in the human body,
The spray volume and particle size of the liquid chemical used are
・ Depends on the part to which the human body is applied, and more chemicals are used
Those with some liquid properties may be used. For this reason, the vibration is supplied to the non-porous diaphragm 57.
Due to the characteristics of the liquid, the non-porous diaphragm 57
The thickness of the formed liquid film varies and is suitable for spraying.
Not be. Therefore, the spray head 11A sprays the spray.
A liquid film that can be sprayed most efficiently for stable operation
We need to maintain our state. To solve the above problem, a display on the diaphragm
Although surface treatment is generally performed, a chemical solution
It was necessary to change the surface treatment depending on the body characteristics. Therefore, in the present embodiment, the medicine to be supplied is
A first surface area having a surface property at which a liquid has a first contact angle
Area and a second surface having a surface property of a second contact angle
The atomizing surface of the non-porous diaphragm 57 is formed by combining the
Configuration. As shown in FIGS. 9A and 9B,
The surface treatment 71 is applied to the entire surface of the atomizing surface of the diaphragm 57.
ing. The surface treatment 71 is performed, for example, by the non-porous vibration
Water-repellent coating is applied to the entire atomizing surface of the moving plate 57,
Later, by shaving off a part of this water-repellent coating film,
Has formed. FIG. 9 (a) shows the water-repellent core in the vertical and horizontal directions.
The coating film into thin lines and combine them in a grid
FIG. 9 shows the atomized surface of the non-porous diaphragm 57 when the
(B) The water-repellent coating film is formed into a thin line only in the vertical direction.
The non-porous diaphragm 5 when scraped and combined in parallel
7 on the atomized surface. Thus, the non-perforated diaphragm 57 is
The water-repellent coating is used as a first surface area on the entire surface of the atomization surface.
A water-repellent side 81 having a water-repellent portion where
Thin water-repellent coating as a surface area
A linear hydrophilic side (non-water repellent) 82 is formed. It is to be noted that the surface treatment 71 includes the water repellent side 81.
And the hydrophilic side (non-water repellent) 82
It may be formed. That is, instead of the water-repellent coating,
Instead, apply a hydrophilic (non-water repellent) coating, and then
Cut off part of this hydrophilic (non-water repellent) coating film
It may be formed by the thing, and the water-repellent coating,
Formed by applying a hydrophilic (non-water repellent) coating
You may. Note that, in the case of FIG.
The part with the hydrophilic side (non-water repellent) 82 is assembled in a hound's tooth check pattern.
You can combine them. In any case, the surface treatment
Reference numeral 71 denotes the water repellent on the entire atomizing surface of the non-porous diaphragm 57.
Side 81 and the hydrophilic side (non-water repellent) 82
What is necessary is just to be formed. The non-porous diaphragm 57 is provided with
The chemical supplied to the entire surface is water-repellent on the water-repellent side 81,
It is drawn to the hydrophilic side (non-water repellent) 82. However
While the water repellent side 81 and the hydrophilic side (non-water repellent) 82
Are formed by alternately combining
A thin layer is formed on the water-repellent side without being completely drawn to the hydrophilic side
Resulting in a substantially uniform liquid film thickness over the entire atomizing surface
It becomes. Therefore, the non-porous diaphragm 57 is provided with
The chemical supplied to the entire surface is in an optimal state. As a result, the spray head 11 of the present embodiment
A can spray various chemicals stably and in any direction
It becomes. The present invention is limited to only the above-described embodiments.
Is not limited and does not depart from the gist of the invention
Various modifications can be made. [Appendix] (Appendix 1) Atomization and spraying of liquid based on ultrasonic vibration
Supply from a predetermined liquid supply means
Has a surface property where the contact angle with the liquid to be discharged is the first contact angle.
A first surface area to be supplied and a liquid supplied from a predetermined liquid supply means.
The contact angle with the liquid to be discharged is different from the first contact angle
A second surface region having a shape,
The first and the second are based on the ultrasonic vibration generated by the motion generating means.
Ultrasonic vibrating hand for atomizing liquid supplied to the surface area 2
A spray head comprising a step. (Appendix 2) The first surface area is water-repellent
Having a hydrophilic property or a hydrophilic property, opposite to the first surface area.
The second surface region has hydrophilicity or water repellency.
The spray head according to claim 1, wherein (Appendix 3) The first surface region and the
Combine with the second surface area in a grid or staggered grid
The spray according to claim 1, wherein the spray is formed by
head. (Additional Item 4) The first surface region and the
The second surface area may be formed by being combined in parallel.
The spray head according to claim 1, characterized in that: According to the present invention as described above,
Small size that can spray various chemicals stably and in any direction
A spray head can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram showing a medical spray system provided with an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a distal end side of the spray catheter of FIG. FIG. 4 is an external front view of the spraying catheter of FIG. 2 viewed from the direction A. FIG. 4 is an explanatory view showing the rear end side of the spraying catheter of FIG. 1. FIG. 5 is a sectional explanatory view showing the distal end side of the spraying catheter of FIG. FIG. 7 is a cross-sectional explanatory view showing the vicinity of the piezoelectric element group of the nebulizing catheter of FIG. 5; FIG. 7 is a cross-sectional view of the nebulizing head of FIG. 5; FIG. FIG. 10 is an explanatory view showing a conventional atomizing head of a non-perforated diaphragm. FIG. 10 is an explanatory view showing a conventional spray head. [Description of References] 1... Medical spraying system 2. Spraying device) 10 Flexible tube 11 Spraying catheter 11A Spray head 51 Piezoelectric element group ( Ultrasonic vibration generating means) 51a Piezoelectric element 52 Resonator 53 Ultrasonic vibrator 54 Cylindrical tube 57 Non-porous vibrating plate (Ultrasonic vibrating means) 71 Surface treatment 81 Water repellent side 82 Hydrophilic side

Claims (1)

Claims: 1. A spray head for atomizing and spraying a liquid based on ultrasonic vibration, wherein a contact angle with a liquid supplied from a predetermined liquid supply means is a first contact angle. A first surface region having a property, and a second surface region having a surface property in which a contact angle with a liquid supplied from a predetermined liquid supply unit is different from the first contact angle. A spray head for atomizing the liquid supplied to the first and second surface regions based on the ultrasonic vibration generated by the ultrasonic vibration generating means.