JP2003265994A - Spray head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized spray head capable of stably spraying various liquids in an optional direction. <P>SOLUTION: The spray head 11A is constituted so as to be provided with an ultrasonic transducer 53 having a resonator 52 which amplifies the fine displacement of a piezoelectric element group 51 provided on the base end side and transfers to the tip end side and producing ultrasonic vibration. The spray head 11A has a liquid chemical supply and discharge pipe 59 as a liquid supply means for supplying the liquid (liquid chemical) to the tip side end surface of the resonator 52 of the ultrasonic transducer 53 or a perforated vibration plate 57 mounted on the end surface and a liquid storage part 72. In the spray head 11A, the perforated vibration plate 57 is constituted so as to form the small number of fine poles to allow the liquid chemical supplied from the liquid chemical supply and discharge pipe 59 and the liquid storage part 72 to cause pressure loss. <P>COPYRIGHT: (C)2003,JPO

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. As shown in FIG.
0 has a through hole 102 formed at the center of the horn 101,
A diaphragm which is a radiating portion so as to communicate with the through hole 102
An injection hole 104 is formed in 103. In addition,
The fog head 100 has a liquid supply connection behind the horn 101
And a liquid supply connection portion 105.
Behind the surrounding horn 101, the ultrasonic vibrator 106
I am wearing it. The ultrasonic transducer 106 is connected to the lead wire 1
07 is connected and is not shown through this lead wire 107.
Drive signal is supplied from a new drive circuit.
You. Further, the spray head 100 is connected to the liquid supply connection.
Connect the hose 108 to the part 105 and
Connect a pump (not shown) to 108 to supply liquid
It is configured. [0004] 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. Conventional spray head configured as above
100 is provided with a liquid supply means on the front face of the diaphragm 103.
There is an advantage that the configuration is simplified because it is not lit. [0005] However, the above described
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 can be performed using the entire surface of the diaphragm 103.
However, there is a problem that the atomization efficiency is poor. Also on
The conventional spray head 100 is the most important when atomizing.
It is difficult to optimally perform liquid level management. [0006] 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 described above
The liquid level control depends on the liquid characteristics and the liquid film thickness is controlled.
Therefore, it is necessary to match the characteristics of each liquid. Where the human body
Considering the medical use inside, the chemical liquid that is used
Spray size and spray particle size differ depending on the case and application site.
In addition, the chemical used has various liquid properties.
May be used. In addition, liquid film management on the diaphragm
Is also important in the direction of atomization. [0007] The conventional spray head 100 includes the supersonic
The diaphragm 103 is placed vertically above the wave
Liquid film thickness is relatively uniform when atomizing
However, with respect to the ultrasonic vibrator 106, the vibration plate 10
When the liquid crystal 3 is arranged other than vertically above the liquid, the liquid
At 03, the liquid film thickness was biased, leading to a decrease in the amount of atomization.
Wake up. Here, the spray head is used for medical purposes inside the human body.
Considering that, in the human body, in general, thin ducts (airway, lungs,
Spraying in the digestive tract, etc.)
And a function capable of spraying in various arbitrary directions is required. [0008] The present invention has been made in view of these circumstances.
That can spray various liquids stably and
To provide a small spray head capable of spraying
Aim. [0009] In order to achieve the above object,
The present invention is directed to atomizing and spraying a liquid by ultrasonic vibration.
In the head, the small displacement of the piezoelectric element
Has a resonator that amplifies and transmits to the tip side, longitudinal vibration mode
An ultrasonic vibrator for generating ultrasonic vibration of the ultrasonic vibrator;
For the end face on the tip side of the rotor or the diaphragm installed on this end face
Liquid supply means for supplying liquid by means of
Pressure loss member that reduces the supply pressure of the liquid supplied from
And characterized in that: With this configuration
Various liquids can be sprayed stably and sprayed in any direction.
A small spray head capable of fog is realized. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;
An embodiment will be described. (First Embodiment) FIGS. 1 to 6 show a first embodiment of the present invention.
FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is an overall configuration diagram showing a medical spraying system provided with FIG.
FIG. 3 is an explanatory view showing the distal end side of the nebulization catheter of FIG.
Sectional explanatory view showing the vicinity of the piezoelectric element group of the nebulization catheter, FIG.
4 is a cross-sectional configuration diagram showing the spray head of FIG. 2, and FIG.
FIG. 6 is an enlarged view showing the tip side of the ultrasonic transducer, and FIG. 6 is a modification of FIG.
FIG. 7 is an enlarged view of the tip side of an ultrasonic transducer showing an example.
Description showing a porous diaphragm having pores (mesh)
FIG. 7A shows a case where a plurality of round holes having the same diameter are formed.
FIG. 7 (b) is an explanatory view showing a perforated diaphragm having different diameters.
Explanatory drawing showing a plurality of perforated diaphragms, FIG.
(C) is a perforated wire mesh or a plurality of square holes
Explanatory drawing showing a diaphragm, FIG. 7D shows concentric slits
Explanatory view showing a porous diaphragm in which a plurality of holes are formed, FIG.
(E) is a concentric slot having a plurality of edges (waveforms).
FIG. 3 is an explanatory view showing a multi-hole diaphragm formed with a plurality of slots.
You. In the present embodiment, a medical spraying device, particularly
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 device 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 apparatus 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 is provided with
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. 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
A pressure cell is connected to an airway 22 which is a connection portion provided outside the body cavity.
The sensor 23 is provided. In addition, the tracheal tube 2
1 indicates that the ventilator 4 is connected via a connection tube 24.
Has been continued. Further, the tracheal tube 21 is
A balloon 25 for fixing the end side in the body cavity is provided.
ing. The tracheal tube 21 is generally used.
Detailed description is omitted because this is a tracheal tube.
You. 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 controls the pressure
Sensor signal from force sensor 23 and operation panel 36
Operation signal or limit detection from the liquid sending section 32
A signal to start or stop spraying is sent to the drive circuit 31 based on the signal.
Signal is output. 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. The nebulizing catheter 11 is connected to the outside
Make a cut near the distal end of the mounting tube 17 to make four
It is divided to form a centering portion 41. Soshi
Then, the screw fixing portion 18 is attached to the flexible tube 10.
When it is shifted to the distal end side, the distal end side of the outer tube 17 is
The contact portion 56a formed on the exterior member 56 described above (see FIG. 2).
And contracted with respect to the flexible tube 10,
The center ring portion 41 expands outward in the outer periphery.
ing. 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. 2 and FIG.
The configuration on the tip side of the satellite 11 will be described. Mentioned above
As described above, the spraying catheter 11 is connected to the tip of the flexible tube 10.
The spray head 11A is provided on the end side. As shown in FIG. 2, the spray head 11A
Separates the piezoelectric element 51a polarized in the thickness direction by this amount.
Piezoelectric elements with multiple layers stacked so that polar directions alternately face each other
Group 51 and a switch for amplifying the minute displacement of the piezoelectric element group 51.
Ultrasonic vibrator 53 composed of Tenres resonator 52
Is configured. The spray head 11A is
The tree is covered so as to cover the outer periphery of the ultrasonic vibrator 53 and the spray side.
A fat-made cylindrical tube 54 is provided on the base end side large-diameter portion 52 of the resonator 52.
a is fixed to the outer peripheral side surface. The cylindrical tube 54 has its distal end side in the inner diameter direction.
A folded portion 54a is formed toward. This turn
The portion 54a is provided on the spray side and on the spray side surface (exposed to outside air).
Surface) is coated with a fluorine-based water-repellent film 55, for example.
ing. The cylindrical tube 54 is connected to the ultrasonic vibrator 53.
A cover for covering the spray side of the ultrasonic vibrator 5
3 may be configured separately from the one that covers the outer peripheral side. The spray head 11A has its rear end 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 outer tube 17.
ing. The exterior member 56 is formed of the exterior tube 17.
A contact portion 56a with which the distal end surface abuts is formed. Previous
The distal end of the outer tube 17 contacts the contact portion 56a.
It is designed to be touched and stopped. The resonator 52 of the spray head 11A
Is, for example, a stainless steel 100 μm thick
Is fixedly joined. This
The porous diaphragm 57 has fine pores (mesh holes) as described later.
1) are formed. In addition, this porous diaphragm 5
7 is to reduce the supply pressure of the supplied chemical solution as described later.
Also serves as a pressure loss member to be lost. In addition, this porous vibration
The spray side of the moving plate 57 is further finer than this diaphragm and
Mesh with multiple fine holes (mesh)
The shroud 58 is fixedly held. This mesh
The plate 58 is a stainless steel plate similar to the porous diaphragm 57.
It is configured in a disc shape with a thickness of 50 μm made of stainless steel. The resonator 52 is formed in the small diameter portion 52c.
For example, a chemical solution having an inner diameter of 0.3 mm
The distal end side of the supply / discharge pipe 59 is inserted and fixed. This medicine
The other end of the liquid supply / discharge pipe 59 is covered with the chemical tube 61.
And extends to the relay connector 14. Also before
The flexible tube 10 connected to the base end of the exterior member 56
The distal end portion 10a is formed by connecting the outer sheath 62 to a heat-shrinkable tube.
At 63, it is sandwiched by the extending portion 56b of the exterior member 56,
Further, the outer periphery is fixed by a metal ring 64. The group of piezoelectric elements 51 is
It is held and fixed at the proximal end. This piezoelectric element group 51 includes:
As shown in FIG. 3, the electrodes of each piezoelectric element 51a are driven.
The motion signal line 67 is connected. These electrodes are
The portion 65 protruding from the element 51 is a heat-shrinkable tube 66.
And inserted into the drive signal line 67,
It extends to the connector 14. Next, referring to FIG. 4 and FIG.
The detailed configuration of the node 11A will be described. The ultrasonic transducer 53
Means that the piezoelectric element group 51 has a large diameter on the base end side of the resonator 52.
It is stored in the storage part 52f formed in the part 52a. So
Then, the ultrasonic transducer 53 is a base end of the resonator 52.
The male screw part 6 is formed on the female screw part 68a formed on the side large diameter part 52a.
8b is screwed on the tip side of the piezoelectric element group 51.
The end face is pressed against the end face of the resonator 52 inside the storage portion 52f.
The piezoelectric element group 51 and the resonator 52 are
It is configured integrally. At this time,
The resonator 52 is configured to conduct to the negative pole.
You. As a result, the ultrasonic vibrator 53
Does not use an adhesive to join the piezoelectric element group 51.
This causes a change in the characteristics due to peeling of this adhesive and cracks.
Therefore, the life of the resonator 52 can be extended.
You. The ultrasonic vibrator 53 has a male screw portion 68b.
Since it is located in a part that does not come in contact with the chemical,
It does not go around to the piezoelectric element group 51 side. 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 is, for example,
For example, four piezoelectric elements are stacked so that the polarization directions are opposite to each other.
The child group 51 is constituted. Note that, in the present embodiment,
A piezoelectric element group 51 is formed by laminating four piezoelectric elements.
However, increasing the number of layers increases the amplitude and increases the amount of spray.
If the number of stacked layers is reduced, higher
Needless to say, the diameter of the element can be reduced. The piezoelectric element 51a has ten poles and a minus pole in front.
The driving signal line 67 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 67 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. Via these drive signal lines 67, the piezoelectric element 51
a is a sine wave or a rectangle intermittent from the drive circuit 31
Apply wave drive signal at specified voltage, frequency and pulse number
Then, a small displacement is made. 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 stored in the liquid part is sprayed on the side surface of the porous diaphragm 57.
From the spray side of the perforated diaphragm 57
And spray it through the mesh plate 58.
It has become. The resonator 52 includes a large-diameter portion 52 on the distal end side.
b, a concave portion 71 is formed,
The hole diaphragm 57 is joined and fixed. This allows
The resonator 52 is formed by the recess 71 so that
The vibration displacement of the moving plate 57 causes damping due to chemical contact.
And the voltage value applied to the piezoelectric element group 51 is small.
Even at a low value, it is easy to spray
By applying pressure, a higher viscosity chemical solution or lower
Spray a chemical solution with surface tension or a chemical solution containing relatively large dispersed particles.
Can be fog. In addition, the end of the large diameter portion 52b on the distal end side
On the surface (the surface that comes into contact with the outside air), the water-repellent film 55 is formed.
Not in. The resonator 52 is formed in the small diameter portion 52c.
The formed space portion 52d communicates with the concave portion 71 and
To store the chemical supplied from the chemical supply and discharge pipe 59
Is formed. This liquid storage 72 is
When the chemical supplied from the chemical supply / discharge pipe 59 is stored,
Then, the stored chemical solution is supplied to the porous diaphragm 57.
It is a channel. The resonator 52 has, for example, a total length of 6
mm, the outer diameter of the proximal-side large-diameter portion 52a is approximately φ4 mm,
The large-diameter portion 52b on the front end side has an outer diameter of approximately φ3 mm,
2c with outer diameter of approximately 0.8mm and inner diameter of approximately 0.5mm
are doing. 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 (a porous diaphragm).
57 at the outer peripheral portion).
Is excited, and a bending vibration is generated together with the porous diaphragm 57.
Do. As a result, the perforated diaphragm 57 is connected to 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 is obtained. The spray head 11A is provided with the storage head.
The chemical supplied from the liquid part 72 to the porous diaphragm 57 is
Of liquid meniscus formed in fine pores (mesh)
A capillary wave is generated by the capillary wave.
Atomization from the fine holes (mesh) of the perforated diaphragm 57
And sprayed through the mesh plate 58.
Swelling. Then, the spray head 11A is
The chemical solution supplied to the hole diaphragm 57 has the fine holes (mesh holes).
Capillary wave on the surface of the liquid meniscus formed in
Is generated, and the capillary vibration is generated by the capillary wave.
The chemical is atomized from the fine holes (mesh) of the plate 57,
Spray plate 58
You. Here, the conventional spray head is provided with
Drug supplied from the supply / discharge pipe 59 via the liquid storage 72
When the supply pressure of the liquid is high,
(Mesh) on the liquid characteristics and spray direction of the chemical
Thus, the thickness of the formed liquid becomes uneven. Therefore,
Conventional spray heads use a liquid film that can spray most efficiently.
The state cannot be maintained. Therefore, this implementation
The spray head 11 </ b> A in the form is provided with a supplied liquid (chemical liquid).
A pressure loss member for reducing the supply pressure is provided. That is, as shown in FIG.
Is a pressure loss member that applies pressure loss to the supplied chemical liquid.
Form micropores (mesh) with a small number of holes to raise
The perforated diaphragm 57 is configured so as to be formed. still,
Fine holes (mesh) formed in the porous diaphragm 57
Has an opening diameter of, for example, 100 μm. Change
Next, the mesh provided on the spray side of the perforated diaphragm 57 will be described.
The shroud 58 has several tens of
Forming a gap 73 of about several hundred μm, for example, 50 μm
Ring member 74 is provided. The perforated diaphragm 57 and the mesh plate
The port 58 has the water-repellent film on the spray side surface (the surface that is exposed to outside air).
55 are coated. In addition, the multi-hole diaphragm
57, mesh plate 58 and ring member 74
The recess formed in the large-diameter portion 52b on the distal end side of the resonator 52
At the outer peripheral end face of the part 71, the joint
Is to be determined. The ring member 74 forms
The perforated diaphragm 57 and the mesh plate 58
Of the gap 73 corresponds to the vibration of the perforated diaphragm 57.
It fluctuates accordingly. By this,
The chemical liquid stored in the liquid storage section 72 is
With the vibration, the mesh plate 58 and the multi-hole vibration
By changing the distance of the gap 73 with the plate 57,
Self-supplied from the fine holes (mesh) of the porous diaphragm 57. At this time, the chemical solution supply / discharge pipe 59
The chemical supplied from the reservoir 72 through the reservoir 72 is
Once at a portion other than the fine holes (mesh) of the hole diaphragm 57
After being blocked, the fine holes (mesh) of the perforated diaphragm 57
The supply pressure of the chemical solution is lost because it is self-supplied from
Becomes possible. Then, the chemical solution on the porous diaphragm 57
Is caused by the surface tension of this chemical solution.
At 8, the liquid film thickness is kept optimal. Therefore, the spray head 11A is
Even if the spray direction is changed in a narrow lumen inside the human body,
The supply pressure of the liquid is reduced and the fine holes of the porous diaphragm 57 are reduced.
Self-supplied from (mesh) and mesh plate
58, the surface tension is maintained.
The liquid film thickness of the chemical solution on the moving plate 57 is not biased.
No. The mesh plate 58 and the porous plate
By changing the distance of the gap 73 with the diaphragm 57,
The mesh plate 58 vibrates relative to the chemical solution.
Can be considered. As a result, the chemical solution
In addition to the vibration caused by the capillary wave of the drug solution itself,
Separation (atomization) of the wave front of the chemical solution is more effective
Occurs at a constant rate. The spray particle size obtained here mainly depends on the drug.
It is governed by the wavelength of the capillary wave excited by the liquid. Subordinate
For example, a mesh 82 having a hole diameter of 100 μm.
Even with the use of the shplate 58, the resulting spray particle size is 1
A spray particle size in the range of up to 00 μm is obtained, and the peak particle size is
It can be 10 μm or less. Also the desired grain
Spray with a considerably large mesh size for the diameter
Because it can be performed, even with a chemical solution with dispersed particles
Spraying can be performed without clogging. As a result, in the present embodiment, various liquids
Small size that can spray stably and spray in any direction
The spray head 11A can be realized. In addition, as shown in FIG.
The mesh plate 58 has its end portion subjected to the multi-hole vibration.
The plate 57 is made of an elastic and chemical-resistant silicone rubber or the like.
You may comprise so that it may be fixed with the adhesive 75. The perforated diaphragm 57 and the mesh
For example, as shown in FIG.
A hole (mesh) 81 may be used.
Note that FIG. 7 shows that the porous diaphragm 57 has different types of fine holes.
81 is shown as a representative example. FIG.
The multi-hole diaphragm 57A shown in FIG.
A plurality of round holes having a diameter are formed. In contrast, FIG.
The porous diaphragm 57B shown in FIG.
A plurality of round holes having different diameters are formed. FIG. 7 (c)
The porous diaphragm 57C shown in FIG.
In addition, a plurality of square holes are formed. In addition, these porous vibrations
With respect to the moving plates 57A to 57C, the multi-hole vibration shown in FIG.
The moving plate 57D has concentric slits as the fine holes 81.
A plurality is formed. On the other hand, FIG.
The porous diaphragm 57E shown in FIG.
A plurality of concentric slits having a
Have been. The multi-hole vibrations shown in FIGS.
The plate 57 (57A to 57E) has an opening portion of the fine hole 81.
The area is large enough not to lose the rigidity of the plate.
Have been. These perforated diaphragms 57 (57A to 57E)
Indicates that the opening area of the fine holes 81 is related to the spray amount,
The spray amount can be increased as the area increases. The perforated diaphragms 57 (57A to 57A)
7E), the opening width of the fine holes 81 is clogged.
It is formed so that it does not spread. That is, the opening of the fine holes 81
The width of the mouth can be adjusted by the surface tension even with a chemical solution with a low surface tension.
It is formed narrow enough to hold. Because of this, spray
The head 11A stably sprays even if the spray direction is changed.
It is possible to do. Furthermore, these multi-hole diaphragms 57
(57A to 57E) indicate that the peripheral length of the opening of the fine hole 81 is
It has some influence on the spray particle size.
More flexible by changing the size of the micro holes 81
Can respond. In this embodiment, a medical spraying device, in particular,
The present invention is applied to a medical spray device used for bronchial treatment
Although the present invention is not limited to this, the trachea
A doctor equipped with a spray head 11A used for purposes other than support treatment
The present invention may be applied to a spray device for
In addition, other than the medical spray device, for example, used for industrial
Applying the present invention to a spraying device having a spraying head 11A
It may be configured. (Second Embodiment) FIG. 8 and FIG.
FIG. 8 relates to the second embodiment of the present invention, and FIG.
FIG. 9 is a cross-sectional configuration diagram showing a spray head according to an embodiment.
It is an enlarged view showing the tip side of an ultrasonic transducer. The first
In the embodiment, the pressure loss member of the supplied chemical liquid is used as the pressure loss member.
Although it is configured using the perforated diaphragm 57, the second actual
In this embodiment, a pressure loss member is provided in the liquid storage section.
Other configurations are substantially the same as those in the first embodiment.
Therefore, the description is omitted, and the same components are denoted by the same reference numerals.
I do. As shown in FIG. 8, the injection according to the second embodiment
The fog head 11B is located outside the small diameter portion 52c of the resonator 52.
Between the circumference and the inner diameter of the cylindrical tube 54
59 is provided with a tip opening,
Forming a liquid storage part 72B for storing the chemical liquid supplied from
are doing. Further, the resonator 52 is provided with
Instead of the hole diaphragm 57, for example, stainless steel is used as the diaphragm.
Disc-shaped non-porous diaphragm 91 with a thickness of 100 μm
Bonded and fixed. On the other hand, as shown in FIG.
The tube 54 has this inner diameter and the larger diameter on the tip side of the resonator 52.
An annular gap (or an annular injection formed from the outer periphery of the portion 52b)
(Also called fog gap) 92 is about several hundred μm
And coaxially assembled. Further, the cylindrical tube 54 is provided with the folded portion 5
4a is the same as that described in the first embodiment.
The mesh plate 58 is made of an elastic and chemically resistant silicon.
And is fixed and held by an adhesive 75 such as rubber rubber.
You. The mesh plate 58 is provided in the first embodiment.
As described in the embodiment, the ring member 74 is used.
May be configured. In this case, the ring member 74
Can be used to replace the mesh plate 58 with the silicone rubber or the like.
Of the mesh plate 58.
The ring member 74 attached with the
It is configured to be fixedly held on the return portion 54a. In addition, the Messi
The lock plate 58 is the same as that described in the first embodiment.
Similarly to the above, the water repellent film 55
Is coated. The mesh plate 58 is provided with the non-porous vibration
As described in the first embodiment between the moving plate 91 and
A gap 93 having a similar size is formed. This gi
The distance between the cap 93 and the vibration of the non-porous diaphragm 91 increases.
It fluctuates. This allows the liquid
The chemical solution stored in the portion 72B has an inner diameter of the cylindrical tube 54 and
From the outer periphery of the tip-side large-diameter portion 52b of the resonator 52
Of the non-perforated diaphragm 91 through the annular gap 92 formed.
The non-porous diaphragm 91 is guided onto the diaphragm from near the edge.
The non-perforated diaphragm 91 and the mesh
Self-sufficiency is obtained by changing the distance to the port 58. So
Then, the chemical solution on the non-porous diaphragm 91 is placed on the surface of this chemical solution.
The liquid film thickness is minimized on the mesh plate 58 by tension.
It is kept properly. The chemical on the non-porous diaphragm 91 is
Capillary waves are excited on this diaphragm, and this capillary
It is atomized from the entire surface of the non-porous diaphragm 91 by the rally wave.
Then, the fine holes (mesh) of the mesh plate 58 are removed.
It is designed to be sprayed through. In this embodiment, the spray head 11B
Are the outer circumference of the small diameter portion 52c of the resonator 52 and the cylindrical tube.
And pressure inside the liquid storage portion 72B formed between
It is configured by providing a loss member. That is, the spray head 11
B is the inside diameter of the cylindrical tube 54 and the resonator 52
From the upper end surface of the base end side large diameter portion 52a to the front end side large diameter portion 52b.
Sponge or urethane as a pressure loss member
Porous and elastic porous bullets such as tongues, fibers and filters
The body 94 is provided. Thus, the chemical solution supply / discharge pipe 59
Is supplied from the liquid storage section 72B through the liquid storage section 72B.
Supply pressure is lost by passing through the porous elastic body 94
The gap through the annular gap 92 at a negative pressure.
It is supplied so as to ooze from 92. And said nothing
The chemical solution on the hole diaphragm 91 is transferred to the mesh plate 58.
Liquid film thickness is maintained optimally by surface tension
It has become. Accordingly, the spray head 11B is
Even if the spray direction is changed in a narrow lumen inside the human body,
The liquid supply pressure is reduced and the non-porous diaphragm 91 is
As well as being self-supplied on the
The surface tension is maintained. For this reason, the spray head 1
1B is a view of the mesh plate 58 and the cylindrical tube 54.
The drug solution does not seep out from between the folded portion 54a and
The liquid film thickness of the chemical solution on the non-porous diaphragm 91 becomes uneven.
Nothing. The chemical on the non-porous diaphragm 91 is
Capillary waves are excited on the non-porous diaphragm 91,
Fog from the entire surface of the non-porous diaphragm 91 by the capillary wave
And sprayed. At this time, the non-perforated diaphragm 91 and the front
The distance of the gap 93 from the mesh plate 58 changes.
By doing so, the mesh plate 5
8 can be considered to be vibrating. By this
The chemical solution is subject to vibration caused by the capillary wave of the chemical solution itself.
In addition, the separation of the wave front of the chemical solution (mist
) Occur more efficiently. Follow
Thus, the spray head 11B of the second embodiment is
It is possible to spray more efficiently than in the first embodiment.
You. In this embodiment, the resonator 52
A structure in which the non-perforated diaphragm 91 is installed in the large-diameter portion 52b on the distal end side.
However, the use of the non-porous diaphragm 91 is not required.
And the cavity 52d of the resonator 52 is filled to resonate integrally.
A medicine container is formed, and a medicine is provided on the distal end surface of the distal large-diameter portion 52b.
You may comprise so that a liquid may be supplied. Note that the present invention
The present invention is not limited to only the above-described embodiments.
Various modifications can be made without departing from the spirit of the invention. [Supplementary notes] (Supplementary note 1) The liquid is atomized and sprayed by ultrasonic vibration.
In the spray head, the minute change of the piezoelectric element
Has a resonator that amplifies the position and transmits it to the tip,
An ultrasonic vibrator for generating ultrasonic vibration of the
To the end face of the wave oscillator or the diaphragm installed on this end face
Liquid supply means for supplying liquid to the liquid supply means,
Pressure loss that reduces the supply pressure of the liquid supplied from the stage
A spray head comprising: a member. (Appendix 2) The pressure loss member is
Elastically arranged in the flow path of the liquid from the liquid supply means
Item 1. The injection member according to Item 1, wherein the injection member is a porous member.
Fog head. (Supplementary Note 3) The diaphragm may be configured so that the pressure loss
The spray head according to claim 1 is a member.
De. (Additional Item 4) The diaphragm is a non-porous diaphragm.
The spray head according to claim 1, wherein: (Appendix 5) End face diameter of the ultrasonic transducer
A cylindrical tube installed with a predetermined gap in the direction
The spray head according to claim 1, characterized in that: (Supplementary Note 6) The outer peripheral side of the resonator is liquid
The spray passage according to claim 1, characterized in that
Good. (Supplementary Note 7) The inside of the resonator is made of liquid
The spray head according to claim 1, wherein the spray head is a flow path.
De. (Additional Item 8) The pressure loss member is
To the extent that pressure loss occurs in the liquid from the liquid supply means
This is a multi-hole diaphragm with a small number of micro holes.
The spray head according to claim 1, characterized in that: (Appendix 9)
Provided on the base end side of the resonator so as to cover the outer periphery of the vibrator.
The ultrasonic vibrator vibrates ultrasonically in a longitudinal vibration mode.
With the above, the liquid supplied from the liquid supply means is
The end face of the resonator or the diaphragm installed on this end face
In the radial direction of the front end face of the resonator so as to be self-supplied.
Additional item 5 characterized by being installed with a constant gap formed.
A spray head according to item 1. (Additional Item 10) The end face on the tip side of the cylindrical tube
Install a mesh plate in this mesh plate
Between the end face of the resonator or the diaphragm,
Is characterized in that the film thickness is maintained by its surface tension
6. The spray head according to claim 5, wherein (Appendix 11) The mesh plate is
Additional note characterized by being elastically fixed to the cylindrical tube
Item 11. A spray head according to Item 10. (Additional Item 12) The diaphragm and the mesh
The plate is elastically fixed with silicone.
The spray head according to claim 10, characterized in that: (Appendix 13) The diaphragm and the mesh
Are fixed to the resonator by laser welding.
The spray head according to claim 10, characterized in that
De. (Additional Item 14) The diaphragm and the mesh
Characterized in that it has a spacer between
Item 11. A spray head according to Item 10. (Supplementary Item 15) The liquid is removed by ultrasonic vibration.
For the spray head that atomizes and sprays, the pressure
A resonator that amplifies the minute displacement of the electric element and transmits it to the tip side
An ultrasonic vibrator for generating ultrasonic vibration;
With respect to the resonator of the ultrasonic transducer, the piezoelectric element
Pressing and fixing means for pressing and fixing to the rear end side not in contact with the liquid,
A spray head comprising: According to the present invention as described above,
Various liquids can be sprayed stably and can be sprayed in any direction.
An efficient and small spray head can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram showing a medical spray system provided with a first 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 explanatory cross-sectional view showing the vicinity of a piezoelectric element group of the nebulization catheter of FIG. 2; FIG. 4 is a cross-sectional configuration diagram showing a nebulization head of FIG. 2; FIG. 5 is an enlarged view showing the tip side of the ultrasonic transducer of FIG. 6 is an enlarged view of the tip side of an ultrasonic vibrator showing a modified example of FIG. 5 [FIG. 7] An explanatory view showing a porous diaphragm having various fine holes (mesh) [FIG. FIG. 9 is an enlarged view showing the tip side of the ultrasonic transducer shown in FIG. 8; FIG. 10 is an explanatory view showing a conventional spray head; Spray system 2 Endoscope device 3 Spray device (medical spray device) 10 Flexible tube 11 Spray catheter 1 A: Spray head 12: Control device 51: Piezoelectric element group 51a: Piezoelectric element 52: Resonator 53: Ultrasonic vibrator 54: Cylindrical tube 57: Porous diaphragm (pressure loss member) 58: Mesh plate 73: Gap 74: Ring member

Claims (1)

Claims: 1. A spray head for atomizing and spraying a liquid by ultrasonic vibration, comprising a resonator for amplifying a minute displacement of a piezoelectric element provided on a base end side and transmitting the displacement to a tip end side. An ultrasonic vibrator that generates ultrasonic vibrations in a longitudinal vibration mode; a liquid supply unit that supplies liquid to a distal end surface of the ultrasonic vibrator or a diaphragm installed on the end surface; and the liquid supply unit. And a pressure loss member for reducing a supply pressure of the liquid supplied from the spray head.