WO2021187513A1 - 保持部材、照射器具及びプラズマ装置 - Google Patents
保持部材、照射器具及びプラズマ装置 Download PDFInfo
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- WO2021187513A1 WO2021187513A1 PCT/JP2021/010776 JP2021010776W WO2021187513A1 WO 2021187513 A1 WO2021187513 A1 WO 2021187513A1 JP 2021010776 W JP2021010776 W JP 2021010776W WO 2021187513 A1 WO2021187513 A1 WO 2021187513A1
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- electrode
- contact surface
- vertical contact
- irradiation device
- axis
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Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
- H05H1/2443—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes the plasma fluid flowing through a dielectric tube
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/042—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating using additional gas becoming plasma
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/06—Implements for therapeutic treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/0005—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for pharmaceuticals, biologicals or living parts
- A61L2/0011—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor for pharmaceuticals, biologicals or living parts using physical methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
- H05H1/2431—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes using cylindrical electrodes, e.g. rotary drums
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
- H05H1/2443—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes the plasma fluid flowing through a dielectric tube
- H05H1/245—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes the plasma fluid flowing through a dielectric tube the plasma being activated using internal electrodes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00744—Fluid flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/44—Applying ionised fluids
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H2245/00—Applications of plasma devices
- H05H2245/30—Medical applications
- H05H2245/32—Surgery, e.g. scalpels, blades or bistoury; Treatments inside the body
Definitions
- the present invention relates to a holding member, an irradiation device, and a plasma device.
- the handpiece for a plasma irradiation device disclosed in JP2017-35281A sterilizes the affected area by irradiating the affected area with plasma from the tip.
- the handpiece for the plasma irradiation device of JP2017-35281A includes a second electrode (33) electrically connected to the electric connector (40), an insulating tube (36) that electrically insulates and covers the electrode, and the like. It is provided with a housing for accommodating these electrodes and an insulating tube.
- the insulating tube (36) is formed in a cylindrical shape so as to cover the root side of the second electrode (33), one end of which is attached to the electric connector (40), and the other end of which is a glass support member (38) or the like. Members are attached.
- the holding member that holds the electrodes has a divided structure.
- a split structure is adopted for the holding member to improve assembling property, there is a possibility that a short circuit may occur between the electrode and an object outside the holding member.
- An object of the present invention is to provide a holding member, an electrode holder, an irradiation device, and a plasma device that can effectively solve such a problem.
- the irradiation apparatus includes a first electrode to which a voltage is applied to generate plasma and a holding member for holding the first electrode, and the holding member includes a first member and a second member.
- the first member and the second member come into contact with each other to form a storage space for accommodating the first electrode, and the contact surface between the first member and the second member is the first member.
- any perpendicular line to the axis passing through the non-vertical contact surface may be non-parallel to the non-vertical contact surface.
- the non-vertical contact surface may have an angle larger than 45 ° with respect to the radial direction perpendicular to the axis.
- the non-vertical contact surface may surround the first electrode from the periphery around the axis.
- the non-vertical contact surface includes a first non-vertical contact surface and a second non-vertical contact surface separated from the first non-vertical contact surface in a radial direction perpendicular to the axis. It may be.
- the first electrode has a terminal portion connected to an external power source, and the non-vertical contact surface is located outside the terminal portion in a radial direction perpendicular to the axis. You may.
- the contact surface includes a vertical contact surface perpendicular to the axis, and the vertical contact surface may be different from the region where the terminal portion is located in the extending direction of the axis.
- the first electrode has a diameter-expanded portion having the largest outward protrusion length in the radial direction perpendicular to the axis, and the non-vertical contact surface has the diameter. It may be located outside the enlarged diameter portion in the direction.
- the contact surface includes a vertical contact surface perpendicular to the axis, and the vertical contact surface is located in a region different from the region where the enlarged diameter portion is located in the extending direction of the axis. You may.
- a second electrode is attached to the holding member so as to face a part of the first electrode, and the non-vertical contact surface has the second electrode in the direction in which the axis extends. It may be located in a region different from the region in which it is located.
- the irradiation device includes an outer cylinder member that is electrically grounded and accommodates the entire first electrode, and the non-vertical contact surface is located between the first electrode and the outer cylinder member. You may.
- the plasma apparatus according to the present invention includes the above-mentioned irradiation device.
- the holding member according to the present invention is a holding member that holds a first electrode to which a voltage is applied to generate plasma, and the holding member has a first member and a second member, and the first member. And the second member come into contact with each other to form a storage space for accommodating the first electrode, and the contact surface between the first member and the second member is not perpendicular to the axis of the first electrode. Includes non-vertical contact surfaces.
- the holding member the irradiating device, and the plasma device of the present invention, it is possible to suppress a short circuit between the electrode and an external object of the holding member while improving the assembling property.
- FIG. 3 is a cross-sectional view of an irradiation device according to an embodiment of the present invention.
- FIG. 3 is a cross-sectional view taken along the line IV-IV of the irradiation device of FIG.
- FIG. 3 is a cross-sectional view taken along the line VV of the irradiation device of FIG.
- FIG. 3 is a partial cross-sectional view of an irradiation device according to an embodiment of the present invention.
- the perspective view of the 1st member and the 2nd part of the holding member which concerns on one Embodiment of this invention.
- FIG. 3 is a cross-sectional view of an irradiation device according to a third modification.
- the plasma device of the present invention is a plasma jet irradiation device or an active gas irradiation device. Both the plasma jet irradiator and the active gas irradiator generate plasma.
- the plasma jet irradiation device directly irradiates the irradiated object with the generated plasma and the active species.
- the active species is produced by the reaction of the gas in the plasma or the gas around the plasma with the plasma.
- the active species are, for example, active oxygen species, active nitrogen species and the like.
- the active oxygen species are, for example, hydroxyl radical, singlet oxygen, ozone, hydrogen peroxide, superoxide anion radical and the like.
- Reactive nitrogen species include, for example, nitric oxide, nitrogen dioxide, peroxynitrite, nitrite peroxide, dinitrogen trioxide and the like.
- the active gas irradiation device irradiates the object to be irradiated with an active gas containing an active species.
- the active species is produced by the reaction of the gas in the plasma or the gas around the plasma with the plasma.
- the plasma device of this embodiment is, for example, an active gas irradiation device.
- the active gas irradiation device 100 of the present embodiment includes an irradiation device 10, a supply unit 20, a gas pipeline 30, a voltage supply line 40, a supply source 70, and a notification unit. It includes 80 and a control unit 90 (calculation unit).
- the irradiation device 10 discharges the active gas generated in the irradiation device 10.
- the irradiation device 10 is operated by a doctor or the like, and has a shape, size, and weight that can be easily operated by a human hand.
- the irradiation device 10 is connected to the supply unit 20 by a gas pipe line 30, a ground line 31, and a voltage supply line 40.
- the irradiation device 10 includes an outer cylinder member 8 described later, and a nozzle 9 constituting the tip of the irradiation device 10.
- the nozzle 9 is attached to the tip of the holding member 1 described later.
- the nozzle 9 has a flow path for an active gas inside.
- the flow path of the active gas in the nozzle 9 communicates with the flow path of the plasma generating gas inside the holding member 1 described later.
- the active gas passes through the irradiation port 1c1 of the third member 1c of the holding member 1 described later and the flow path inside the nozzle 9, and the nozzle irradiation located at the tip of the nozzle 9 is performed. It is discharged from the mouth 9a.
- the gas pipeline 30 and the voltage supply line 40 are housed in one cable 32.
- the supply unit 20 supplies electric power and plasma generating gas to the irradiation device 10.
- the supply unit 20 houses the supply source 70.
- the supply source 70 contains a gas for generating plasma.
- the supply unit 20 receives power from a power source such as a 100 V household power source. Further, the supply unit 20 may be equipped with a rechargeable battery as a power source inside.
- FIG. 3 is a cross-sectional view (longitudinal cross section) of the surface of the irradiation device 10 along the extending direction of the irradiation device 10.
- FIG. 4 is a cross-sectional view showing a cross section of the irradiation device 10 of FIG. 3 along the IV-IV line.
- FIG. 5 is a cross-sectional view showing a cross section of the irradiation device 10 of FIG. 3 along the VV line.
- the outer cylinder member 8 and the nozzle 9 are not shown.
- the irradiation device 10 includes an electrode holder 7.
- the electrode holder 7 includes a first electrode 4 and a holding member 1 that holds the first electrode 4.
- the electrode holder 7 further includes a second electrode 5, a tubular dielectric 3, and O-rings 6a, 6b, and 6c.
- the irradiation device 10 may include an electrically grounded outer cylinder member 8 in addition to the electrode holder 7.
- FIG. 6 is a diagram showing a range surrounded by a two-dot chain line with reference numeral VI of FIG. 3 for an irradiation device 10 further provided with an outer cylinder member 8 in addition to the electrode holder 7 shown in FIG.
- the outer cylinder member 8 is a conductive member having a substantially cylindrical shape and accommodating the entire first electrode 4 inside.
- the outer cylinder member 8 may accommodate the entire electrode holder 7.
- the outer cylinder member 8 houses the electrode holder 7 inside.
- the first electrode 4 is an electrode to which a voltage is applied to generate plasma.
- the first electrode 4 has a terminal portion 4a connected to an external power source via a voltage supply line 40, and a voltage is applied by the external power source.
- the terminal portion 4a is a soldered portion when the voltage supply line 40 is soldered to the first electrode 4.
- the first electrode 4 has an axis O1.
- the axis O1 of the first electrode 4 is, for example, a virtual line segment extending in the extending direction d1 of the first electrode 4 and located in a range where the first electrode 4 is located in the direction d1.
- the extending direction d1 of the axis O1 is also referred to as the axis direction d1.
- the first electrode 4 has a diameter-expanded portion 4b having the largest outward protrusion length in the radial direction d2 perpendicular to the axis O1.
- the first electrode 4 has a diameter-expanded portion 4b and a detail 4c having a smaller outward protrusion length in the radial direction d2 than the diameter-expanded portion 4b.
- a part of the enlarged diameter portion 4b is connected to an external power source to form a terminal portion 4a.
- the enlarged diameter portion 4b and the detail 4c each have a substantially cylindrical shape extending in the axial direction d1.
- the outer diameter d of the portion of the first electrode 4 facing the second electrode 5, which will be described later, can be appropriately determined in consideration of the application of the active gas irradiation device 100 (that is, the size of the irradiation device 10) and the like.
- the outer diameter d is preferably 0.5 mm to 20 mm, more preferably 1 mm to 10 mm.
- the outer diameter d is at least the above lower limit value, the first electrode 4 can be easily manufactured.
- the outer diameter d is at least the above lower limit value, the surface area of the first electrode 4 becomes large, plasma can be generated more efficiently, and healing and the like can be further promoted.
- the outer diameter d is not more than the above upper limit value, plasma can be generated more efficiently and healing or the like can be further promoted without making the irradiation device 10 excessively large.
- the material of the first electrode 4 is not particularly limited as long as it is a conductive material, and a metal that can be used as an electrode of a known plasma device can be applied.
- Examples of the material of the first electrode 4 include metals such as stainless steel, copper and tungsten, carbon and the like.
- the voltage applied to the first electrode 4 is not particularly limited as long as plasma is generated between the first electrode 4 and the second electrode 5.
- the voltage applied to the first electrode 4 is, for example, 0.5 kVpp or more and 20 kVpp or less.
- the voltage applied to the first electrode 4 is more preferably 2 kVpp or more and 18 kVpp or less, and further preferably 5 kVpp or more and 15 kVpp or less.
- pp" in "kVpp” is an abbreviation for peak to peak.
- the second electrode 5 is an electrode facing a part of the first electrode 4.
- the second electrode 5 is a cylindrical electrode that orbits a part of the first electrode 4.
- the second electrode 5 faces a part of the detail 4c of the first electrode 4 in the radial direction d2.
- the second electrode 5 is electrically grounded.
- the second electrode 5 is electrically grounded by being connected to the ground wire 31.
- the effect of the second electrode 5 facing a part of the first electrode 4 will be described. Assuming that the length of the second electrode 5 in the axial direction d1 is larger than the length of the first electrode 4 in the axial direction d1, and the second electrode 5 faces the entire first electrode 4 in the axial direction d1. think. In this case, the area where the first electrode 4 and the second electrode 5 face each other becomes larger. The temperature of the generated plasma increases as the area of the electrodes used increases. Therefore, when the second electrode 5 faces the entire first electrode 4, the generated plasma becomes hotter.
- the second electrode 5 faces a part of the first electrode 4, it is possible to prevent the generated plasma from becoming hot. Therefore, for example, it is possible to generate a lower temperature plasma suitable for irradiating the teeth and skin of humans and animals. In particular, even when a higher voltage is applied to the electrodes, it is possible to suppress the temperature rise of the generated plasma. Therefore, it can be said that the form in which the second electrode 5 faces a part of the first electrode 4 is particularly suitable when a high voltage is applied to the electrodes.
- the tip portion 4d of the first electrode 4 protrudes toward the tip end side (left side in FIG. 3) of the irradiation device 10 with respect to the tip portion 5a of the second electrode 5.
- plasma can be stably generated over the entire length of the second electrode 5 in the axial direction d1.
- the material of the second electrode 5 is not particularly limited as long as it is a conductive material, and a metal used for an electrode of a known plasma device can be applied.
- Examples of the material of the second electrode 5 include metals such as stainless steel, copper and tungsten, carbon and the like.
- the tubular dielectric 3 is a member having an inner space 3a.
- the tubular dielectric 3 is a cylindrical member extending in the axial direction d1.
- the first electrode 4 is arranged in the inner space 3a of the tubular dielectric 3.
- a part of the detail 4c of the first electrode 4 is arranged in the inner space 3a.
- the first electrode 4 is arranged so as to be separated from the inner surface of the tubular dielectric 3. Further, the second electrode 5 is arranged so as to be in contact with the outer surface of the tubular dielectric 3.
- the material of the tubular dielectric 3 As the material of the tubular dielectric 3, a dielectric material used in a known plasma device can be applied.
- the material of the tubular dielectric 3 is, for example, glass, ceramics, synthetic resin, or the like. The lower the dielectric constant of the tubular dielectric 3, the more preferable.
- the inner diameter R of the tubular dielectric 3 can be appropriately determined in consideration of the outer diameter d of the portion of the first electrode 4 facing the second electrode 5, which will be described later.
- the inner diameter R is determined so that the distance s described later is within a desired range.
- the distance s between the outer surface of the first electrode 4 and the inner surface of the tubular dielectric 3 is preferably 0.05 mm to 5 mm, preferably 0.1 mm to 0.1 mm. 1 mm is more preferable.
- the distance s is equal to or greater than the above lower limit value, a desired amount of plasma generating gas can be easily passed when the inner space 3a of the tubular dielectric 3 is used as a flow path for the plasma generating gas as described later. ..
- the distance s is equal to or less than the above upper limit value, plasma can be generated more efficiently and the temperature of the active gas can be lowered.
- the holding member 1 is a member that holds the electrodes. As an example, the holding member 1 electrically insulates the first electrode 4. Further, as an example, as shown in FIG. 3, the holding member 1 contacts the first electrode 4 and holds the first electrode 4. Further, as an example, the holding member 1 directly faces the first electrode 4 and holds the first electrode 4. In other words, a region where other members are not located is formed at least partially between the holding member 1 and the first electrode 4. As shown in FIG. 3, the holding member 1 has a first member 1a and a second member 1b. The first member 1a and the second member 1b come into contact with each other to form a storage space 1d that accommodates at least a part of the first electrode 4. In the example shown in FIG. 3, the enlarged diameter portion 4b of the first electrode 4 is housed in the storage space 1d.
- FIG. 7 is a perspective view showing the first member 1a and the second member 1b. Note that in FIG. 7, the screw holes used for fixing the first member 1a and the second member 1b to each other are not shown.
- the first member 1a and the second member 1b are both substantially cylindrical members extending in the axial direction d1.
- the second member 1b has a shape in which at least a part thereof can be inserted into the first member 1a. Specifically, the second member 1b has an outer diameter smaller than the inner diameter of the first member 1a, at least in part.
- the first member 1a and the second member 1b come into contact with each other, and a storage space 1d is formed.
- the first member 1a and the second member 1b may come into contact with each other to form a storage space 1d by inserting at least a part of the first member 1a into the second member 1b.
- the second member 1b is provided with a screw hole 1b1 for inserting a screw.
- the first member 1a is also provided with a screw hole. The first member 1a and the second member 1b are fixed to each other in a state of being in contact with each other by screws (not shown) inserted into the screw holes of the first member 1a and the second member 1b.
- the first member 1a contacts the first electrode 4 from one side along the axis O1 (right side in FIG. 3), and the first member 1a is in contact with the first electrode 4 and one side along the axis O1 of the first electrode 4. It regulates the movement to. Further, the second member 1b contacts the first electrode 4 from the other side (left side in FIG. 3) along the axis O1 and restricts the movement of the first electrode 4 to the other side along the axis O1. ing. In the example shown in FIG. 3, the second member 1b is in contact with the enlarged diameter portion 4b of the first electrode 4 from the other side along the axis O1 via the O-ring 6a.
- the O-ring 6a is a member made of an elastic resin member, is sandwiched between the diameter-expanded portion 4b and the second member 1b, and is in close contact with the diameter-expanded portion 4b and the second member 1b. As a result, the first electrode 4 is held in a state where the movement in the axial direction d1 is restricted.
- the holding member 1 further includes a third member 1c. Then, the holding member 1 further holds the second electrode 5 and the tubular dielectric 3 by the second member 1b and the third member 1c.
- the third member 1c is a substantially cylindrical member extending in the axial direction d1.
- the second member 1b has a shape in which at least a part thereof can be inserted into the third member 1c. Specifically, the second member 1b has an outer diameter smaller than the inner diameter of the third member 1c, at least in part.
- the second member 1b and the third member 1c come into contact with each other, and a space for accommodating the second electrode 5 and the tubular dielectric 3 is created. It is formed.
- the second member 1b and the third member 1c come into contact with each other, and the second electrode 5 and the tubular dielectric 3 are formed.
- a space for accommodating may be formed.
- the second member 1b contacts the second electrode 5 from one side along the axis O1 and restricts the movement of the second electrode 5 to the other side along the axis O1.
- the third member 1c contacts the second electrode from the other side along the axis O1 and restricts the movement of the second electrode 5 to the other side along the axis O1.
- the second electrode 5 is held in a state where the movement in the axial direction d1 is restricted.
- the second member 1b contacts the tubular dielectric 3 from one side along the axis O1 via the O-ring 6b, and moves the tubular dielectric 3 to one side along the axis O1. It is regulated.
- the third member 1c contacts the tubular dielectric 3 from the other side along the axis O1 via the O-ring 6c, and moves the tubular dielectric 3 to the other side along the axis O1. It is regulated.
- the O-rings 6b and 6c are members made of an elastic resin member, and have an inner diameter that is in close contact with the outer peripheral surface of the tubular dielectric 3. As a result, the tubular dielectric 3 is held in a state in which movement in the axial direction d1 is restricted.
- An irradiation port 1c1 is provided at the tip of the third member 1c on the tip side (left side in FIG. 3) of the irradiation device 10.
- the irradiation port 1c1 communicates the inner space 3a of the tubular dielectric 3 with the outside of the irradiation device 10.
- the holding member 1 has a part of the voltage supply line 40 so that the voltage supply line 40 can be connected to the terminal portion 4a and extend to the outside of the holding member 1. It further has a voltage supply line accommodating portion 1e for accommodating. Further, in the examples shown in FIGS. 3 and 5, the holding member 1 is a part of the grounding wire 31 so that the grounding wire 31 can be connected to the second electrode 5 and extend to the outside of the holding member 1. Further has a ground wire accommodating portion 1f for accommodating the above.
- the shapes of the first member 1a, the second member 1b, and the third member 1c are substantially cylindrical.
- the shapes of the first member 1a, the second member 1b, and the third member 1c may be polygonal cylinders such as a square cylinder, a hexagonal cylinder, and an octagonal cylinder.
- the material of the first member 1a, the second member 1b, and the third member 1c is not particularly limited, but a material having an insulating property is preferable.
- the insulating material is, for example, a thermoplastic resin, a thermosetting resin, or the like.
- Thermoplastic resins include, for example, polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene resin (ABS resin), polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF).
- thermosetting resin is, for example, a phenol resin, a melamine resin, a urea resin, an epoxy resin, an unsaturated polyester resin, a silicon resin, or the like.
- a composite of polyethylene terephthalate (PET) as a main raw material filled with short glass fibers, an inorganic filler, or the like can also be used. Examples of such a material include Unilate (registered trademark) manufactured by Unitika Ltd.
- PEEK or mPPE has the physical characteristics of a resin suitable for the materials of the first member 1a, the second member 1b and the third member 1c. Therefore, it is more preferable.
- the holding member 1 When the holding member 1 includes the first member 1a and the second member 1b, and further includes the third member 1c, the holding member 1 can be disassembled into a plurality of members. Therefore, the first electrode 4, the second electrode 5, the tubular dielectric 3, and the like held by the holding member 1 can be easily removed from the holding member 1. Further, it is also possible to easily assemble the electrode holder 7 and the irradiation device 10 by using the first member 1a, the second member 1b, and the third member 1c.
- the irradiation device 10 shown in FIG. 3 can be assembled by the following procedure, for example. First, the first member 1a, the second member 1b, and the first electrode 4 are arranged so that the first member 1a and the second member 1b face each other with the first electrode 4 interposed therebetween.
- the first member 1a and the second member 1b are brought into contact with each other and fixed to each other so that at least a part of the first electrode 4 is accommodated in the storage space 1d.
- the first member is such that at least the enlarged diameter portion 4b is located inside the first member 1a and at least a part of the details 4c is located outside the first member 1a.
- the electrode 4 is inserted into the first member 1a from the diameter-expanded portion 4b side. As a result, the first electrode 4 and the first member 1a come into contact with each other in the axial direction d1, and the movement of the first electrode 4 is suppressed.
- the second member 1b is brought closer from the detail 4c side of the first electrode 4, the detail 4c passes through the inside of the second member 1b, and the second member 1b covers the enlarged diameter portion 4b.
- the second member 1b is brought into contact with each other and fixed to each other. As a result, the first electrode 4 is held by the first member 1a and the second member 1b.
- the third member 1c, the second electrode 5, and the tubular dielectric 3 are arranged so that the second member 1b and the third member 1c face each other with the second electrode 5 and the tubular dielectric 3 interposed therebetween.
- the second member 1b and the third member 1c are brought into contact with each other and fixed to each other so that the second electrode 5 and the tubular dielectric 3 are accommodated between the second member 1b and the third member 1c. do.
- the irradiation device 10 According to the irradiation device 10 according to the present embodiment, it can be assembled according to the above procedure, and the first electrode 4 and the second member 1b buffer when the first member 1a and the second member 1b are brought into contact with each other. It becomes difficult to assemble and the assembleability becomes good.
- the contact surface 2 between the first member 1a and the second member 1b includes a non-vertical contact surface 2a that is not perpendicular to the axis O1.
- the contact surface 2 includes the non-vertical contact surface 2a and the vertical contact surface 2b perpendicular to the axis O1.
- the non-vertical contact surface 2a is located outside the radial direction d2 with respect to the first electrode 4.
- the angle ⁇ formed by the non-vertical contact surface 2a with respect to the radial direction d2 is 90 °.
- the non-vertical contact surface 2a Surrounds the first electrode 4 from the periphery centered on the axis O1 as shown in FIG.
- FIG. 8 is a cross-sectional view showing the periphery of the contact surface 2 in the irradiation device 10 including the electrode holder 7 and the outer cylinder member 8 according to the reference example.
- a conductive object such as the outer cylinder member 8 shown in FIG. 8 may be arranged outside the first electrode 4 in the radial direction d2 and outside the holding member 1.
- the contact surface 2 according to the reference example does not have the non-vertical contact surface 2a and is a surface perpendicular to the axis O1.
- the contact surface 2 includes the non-vertical contact surface 2a.
- the non-vertical contact surface 2a is provided so that the perpendicular line to the axis O1 includes a line intersecting the non-vertical contact surface 2a. Since the contact surface 2 includes the non-vertical contact surface 2a, the holding member extends from the first electrode 4 in the radial direction d2 at a position where the non-vertical contact surface 2a is located outside the radial direction d2 of the first electrode 4. The lines of electric force directed to the external object of 1 are blocked by the first member 1a and the second member 1b.
- the creepage distance between the first electrode 4 and the external object of the holding member 1 can be increased. Then, it is possible to suppress a short circuit between the first electrode 4 and an external object of the holding member 1 via between the first member 1a and the second member 1b. In particular, it is possible to suppress a short circuit between the first member 1a and the second member 1b while facilitating the disassembly and assembly of the holding member 1.
- the non-vertical contact surface 2a is located between the first electrode 4 and the outer cylinder member 8. Therefore, it is possible to suppress a short circuit between the first electrode 4 and the outer cylinder member 8 via between the first member 1a and the second member 1b.
- the non-vertical contact surface 2a is provided so that an arbitrary perpendicular line to the axis O1 passing through the non-vertical contact surface 2a is non-parallel to the non-vertical contact surface O1.
- a perpendicular line to the axis O1 passing through the non-vertical contact surface 2a is drawn, it is always non-parallel to the non-vertical contact surface 2a and a perpendicular line parallel to the non-vertical contact surface 2a is drawn.
- a non-vertical contact surface 2a is provided so that the non-vertical contact surface 2a cannot be provided.
- the terminal portion 4a of the first electrode 4 has a configuration for connecting the first electrode 4 to an external power source, such as solder and a portion of the voltage supply line 40 to be soldered to the first electrode 4. Elements can be placed. Therefore, in the terminal portion 4a, the first electrode 4 and the first electrode 4 are electrically connected to each other as much as the components for connecting the first electrode 4 to the external power source are arranged. It is considered that the distance between the element and the object outside the holding member 1 is likely to be short, and a short circuit is likely to occur.
- the non-vertical contact surface 2a is located outside the terminal portion 4a in the radial direction d2. As a result, a short circuit between the terminal portion 4a and an external object of the holding member 1 can be effectively suppressed.
- the enlarged diameter portion 4b of the first electrode 4 is the portion of the first electrode 4 having the largest outward protrusion length in the radial direction d2, it is an object outside the holding member 1. It is considered that the distance between the two is likely to be short and a short circuit is likely to occur.
- the non-vertical contact surface 2a is located outside the enlarged diameter portion 4b in the radial direction d2. As a result, a short circuit between the enlarged diameter portion 4b and an external object of the holding member 1 can be effectively suppressed.
- the second electrode 5 faces a part of the first electrode 4.
- the portion of the first electrode 4 that does not face the second electrode 5 is short-circuited with an external object of the holding member 1 by the amount that the second electrode 5 does not exist between the portions that face the second electrode 5. It is thought that it is likely to occur.
- the non-vertical contact surface 2a is located in a region different from the region in which the second electrode 5 is located in the extending direction of the axis O1. As a result, it is possible to effectively suppress a short circuit between the portion of the first electrode 4 that does not face the second electrode 5 and an external object of the holding member 1.
- a part of the first electrode 4 is arranged in the inner space 3a of the tubular dielectric 3.
- the non-vertical contact surface 2a is located in a region different from the region where the tubular dielectric 3 is located in the axial direction d1 where the axis O1 extends.
- the non-vertical contact surface 2a surrounds the first electrode 4 from the periphery centered on the axis O1. Therefore, it is possible to suppress a short circuit between the first electrode 4 and an external object of the holding member 1 in the entire circumferential direction centered on the axis O1.
- the contact surface 2 includes the vertical contact surface 2b.
- the vertical contact surface 2b is located in the region where the first electrode 4 is located in the axial direction d1.
- the thickness of the holding member 1 extending from the first electrode 4 in the radial direction d2 and blocking the electric lines of force toward the external object of the holding member 1 becomes small. ..
- the vertical contact surface 2b is located in a region different from the region in which the terminal portion 4a is located in the axial direction d1. Therefore, it is possible to secure the thickness of the holding member 1 in the region where the terminal portion 4a is located. As a result, for example, even when a high voltage is applied to the first electrode 4, the terminal portion 4a and the external object of the holding member 1 are short-circuited through the portion where the thickness of the holding member 1 is small. , Can be suppressed.
- the vertical contact surface 2b is located in a region different from the region in which the enlarged diameter portion 4b is located in the axial direction d1. As a result, it is possible to prevent the enlarged diameter portion 4b and the external object of the holding member 1 from being short-circuited through the portion where the thickness of the holding member 1 is small.
- the first electrode 4 includes a first portion 4e located in the inner space 3a of the tubular dielectric 3 and a second portion 4f located outside the inner space 3a.
- the vertical contact surface 2b is located in a region different from the region in which the second portion 4f is located in the axial direction d1.
- the vertical contact surface 2b is located in a region different from the region in which the first electrode 4 is located in the axial direction d1.
- the thickness of the holding member 1 in the entire region where the first electrode 4 is located can be secured.
- plasma generation gas is supplied from the supply unit 20 between the first electrode 4 and the second electrode 5.
- the first electrode 4 and the tubular dielectric 3 are arranged apart from each other.
- the inner space 3a of the tubular dielectric 3 may be used as a flow path for the plasma generating gas to supply the plasma generating gas between the first electrode 4 and the second electrode 5.
- the gap between the second electrode 5 and the tubular dielectric 3 is used as a flow path for the plasma generating gas.
- a plasma generating gas may be supplied between the first electrode 4 and the second electrode 5.
- the method of supplying the plasma generating gas between the first electrode 4 and the second electrode 5 is not particularly limited.
- the inside of the first electrode 4 may be hollow.
- the plasma generating gas supplied to the irradiation device 10 via the gas pipeline 30 passes through the inside of the first electrode 4 and is provided on the first electrode 4 facing the second electrode 5. By exiting the hole, it is supplied between the first electrode 4 and the second electrode 5.
- the holding member 1 described later may be provided with a through hole. In this case, the plasma generating gas supplied to the irradiation device 10 via the gas pipeline 30 is supplied between the first electrode 4 and the second electrode 5 through the through hole of the holding member 1. ..
- the supply unit 20 as shown in FIG. 1 supplies electricity and plasma generating gas to the irradiation device 10.
- the supply unit 20 can adjust the voltage and frequency applied between the first electrode 4 and the second electrode 5.
- the supply unit 20 includes a housing 21 that houses the supply source 70.
- the housing 21 houses the supply source 70 in a detachable manner. As a result, when the gas in the supply source 70 housed in the housing 21 runs out, the plasma generation gas supply source 70 can be replaced.
- the supply source 70 supplies a plasma generating gas between the first electrode 4 and the second electrode 5.
- the supply source 70 is a pressure-resistant container in which a gas for plasma generation is housed. As shown in FIG. 2, the supply source 70 is detachably attached to the pipe 75 arranged in the housing 21.
- the pipe 75 connects the supply source 70 and the gas pipe line 30.
- a solenoid valve 71, a pressure regulator 73, a flow rate controller 74, and a pressure sensor 72 (remaining amount sensor) are attached to the pipe 75.
- the solenoid valve 71 When the solenoid valve 71 is opened, the plasma generating gas is supplied from the supply source 70 to the irradiation device 10 via the pipe 75 and the gas pipeline 30.
- the solenoid valve 71 does not have a configuration in which the valve opening degree can be adjusted, but has a configuration in which only opening and closing can be switched.
- the solenoid valve 71 may have a configuration in which the valve opening degree can be adjusted.
- the pressure regulator 73 is arranged between the solenoid valve 71 and the supply source 70. The pressure regulator 73 reduces the pressure of the plasma generating gas (reducing the plasma generating gas) from the supply source 70 toward the solenoid valve 71.
- the flow rate controller 74 is arranged between the solenoid valve 71 and the gas pipeline 30.
- the flow rate controller 74 adjusts the flow rate (supply amount per unit time) of the plasma generating gas that has passed through the solenoid valve 71.
- the flow rate controller 74 adjusts the flow rate of the plasma generating gas to, for example, 3 L / min.
- the pressure sensor 72 detects the remaining amount V1 of the plasma generating gas at the supply source 70.
- the pressure sensor 72 measures the pressure (residual pressure) in the supply source 70 as the remaining amount V1.
- the pressure sensor 72 measures the pressure (primary pressure) of the plasma generating gas passing between the pressure regulator 73 and the supply source 70 (primary side of the pressure regulator 73) as the pressure of the supply source 70.
- the pressure sensor 72 for example, Keyence's AP-V80 series (specifically, for example, AP-15S) or the like can be adopted.
- the actual remaining amount V1 (volume) of the supply source 70 is calculated from the residual pressure measured by the pressure sensor 72 and the capacity (internal volume) of the supply source 70.
- the capacity for calculation is set by selecting the actual capacity of the supply source 70 on the system screen of an input unit (not shown). You may. Further, in the case of using a fixed-dose supply source 70 as the supply source 70, the control unit 90 may store the capacity in advance.
- a joint 76 is provided at the end of the pipe 75 on the supply source 70 side.
- a supply source 70 is detachably attached to the joint 76.
- plasma is generated while the solenoid valve 71, the pressure regulator 73, the flow rate controller 74, and the pressure sensor 72 (hereinafter referred to as “solenoid valve 71, etc.”) are fixed to the housing 21.
- the gas supply source 70 can be replaced.
- a common solenoid valve 71 or the like can be used for both the supply source 70 before replacement and the supply source 70 after replacement.
- the solenoid valve 71 and the like may be fixed to the supply source 70 and may be integrally detachable from the housing 21 together with the supply source 70.
- the gas pipeline 30 is a path for supplying plasma generation gas from the supply unit 20 to the irradiation device 10.
- the gas pipeline 30 is connected to the rear end of the tubular dielectric 3 of the irradiation device 10.
- the material of the gas pipe 30 is not particularly limited, and a known material used for the gas pipe can be applied.
- a resin pipe, a rubber tube, or the like can be exemplified, and a flexible material is preferable.
- the voltage supply line 40 is a wiring that supplies a voltage from the supply unit 20 to the irradiation device 10. As described above, the voltage supply line 40 is connected to the first electrode 4 of the irradiation device 10 and is connected to a foot switch (not shown).
- the material of the voltage supply line 40 is not particularly limited, and a known material used for the voltage supply line can be applied. As the material of the voltage supply wire 40, a metal conductor or the like coated with an insulating material can be exemplified.
- the control unit 90 as shown in FIG. 2 is configured by using an information processing device. That is, the control unit 90 includes a CPU (Central Processor Unit), a memory, and an auxiliary storage device connected by a bus. The control unit 90 operates by executing a program. The control unit 90 may be built in the supply unit 20, for example. The control unit 90 controls the irradiation device 10, the supply unit 20, and the notification unit 80.
- a CPU Central Processor Unit
- the control unit 90 controls the irradiation device 10, the supply unit 20, and the notification unit 80.
- a foot switch (not shown) is electrically connected to the control unit 90.
- the control unit 90 When the foot switch is operated by the user of the irradiation device 10, an electric signal is sent from the foot switch to the control unit 90.
- the control unit 90 receives the electric signal, the control unit 90 operates the solenoid valve 71 and the flow rate controller 74, and applies a voltage to the first electrode 4.
- the control unit 90 when the user presses the foot switch once, the control unit 90 receives an electric signal. Then, the control unit 90 opens the solenoid valve 71 for a predetermined time, causes the flow controller 74 to adjust the flow rate of the plasma generating gas that has passed through the solenoid valve 71, and applies a voltage to the first electrode 4 for a predetermined time. do. As a result, a certain amount of plasma generating gas is supplied from the supply source 70 between the first electrode 4 and the second electrode 5, and the active gas is discharged from the nozzle irradiation port 9a for a certain period of time (for example, about several seconds to several tens of seconds). , 30 seconds in this embodiment), and the gas is continuously discharged.
- a certain period of time for example, about several seconds to several tens of seconds. , 30 seconds in this embodiment
- the amount of active gas discharged per time the user presses the foot switch is fixed.
- Such an operation of discharging an active gas having a predetermined discharge amount is called a unit operation.
- the unit operation is one pressing of the foot switch by the user.
- the amount of active gas discharged per unit operation (the amount of plasma generating gas supplied from the supply source 70 to the first electrode 4 and the second electrode 5 per unit operation) is set in advance. It may be a fixed value or a variable value that can be set by operating an operation panel (not shown).
- the control unit 90 calculates at least one of the remaining number N and the remaining time T of the plasma generating gas as residual information. In the present embodiment, the control unit 90 calculates only the remaining number N of the remaining number N and the remaining time T as the remaining information.
- the remaining number N is the number of remaining unit operations in which the plasma generating gas remaining in the supply source 70 can supply the plasma generating gas between the first electrode 4 and the second electrode 5 from the supply source 70. Is.
- the remaining time T is the remaining time during which the plasma generating gas remaining in the supply source 70 can supply the plasma generating gas between the first electrode 4 and the second electrode 5 from the supply source 70.
- Both the remaining number of times N and the remaining time T can be calculated from the remaining amount V1 of the plasma generating gas at the supply source 70.
- the average value V2 (average value) of the amount of plasma generation gas used (supply amount) in the last few times is calculated, and the average value V2 (average value) is divided by the remaining amount V1 of the plasma generation gas.
- the remaining number of times N is calculated.
- the notification unit 80 notifies at least one of the remaining number of times N and the remaining time T.
- the notification unit 80 displays the remaining number of times N.
- the notification unit 80 displays the remaining number N calculated by the control unit 90 as a number.
- a display device capable of displaying an arbitrary number may be adopted, or a mechanical counter may be adopted.
- the notification unit 80 is provided on the outer surface of the housing 21 integrally with the housing 21, but may be provided independently of the supply unit 20. Further, the notification unit 80 may display the remaining number of times N in a form different from the number. For example, the notification unit 80 may adopt a configuration in which an analog display formed by a dial and hands is used. Further, for example, the notification unit 80 may notify the remaining number of times N depending on the color display mode and the light lighting mode.
- the notification unit 80 may notify the remaining number of times N by voice.
- a speaker or the like can be adopted as the notification unit 80.
- a user such as a doctor moves the irradiation device 10 with the irradiation device 10 and directs the nozzle irradiation port 9a toward an object to be irradiated, which will be described later.
- the user presses the foot switch to supply electricity and plasma generating gas from the supply source 70 to the irradiation device 10.
- the plasma generating gas supplied to the irradiation device 10 flows into the inner space 3a of the tubular dielectric 3 from the rear end of the tubular dielectric 3.
- the plasma generating gas is ionized at a position where the first electrode 4 and the second electrode 5 face each other to become plasma.
- the first electrode 4 and the second electrode 5 face each other in a direction orthogonal to the flow direction of the plasma generating gas.
- the plasma generated at the position where the outer peripheral surface of the first electrode 4 and the inner peripheral surface of the second electrode 5 face each other changes the gas composition while flowing through the inner space 3a of the tubular dielectric 3, and activates radicals and the like. It becomes an active gas containing seeds.
- the generated active gas is discharged from the nozzle irradiation port 9a.
- the discharged active gas further activates a part of the gas in the vicinity of the nozzle irradiation port 9a to generate an active species.
- the active gas containing these active species is irradiated to the object to be irradiated.
- Examples of the irradiated object include cells, biological tissues, and individual organisms.
- Examples of the biological tissue include organs such as internal organs, epithelial tissue covering the inner surface of the body surface and body cavity, periodontal tissue such as gingiva, alveolar bone, periodontal ligament and cementum, teeth and bone.
- the individual organism may be any of mammals such as humans, dogs, cats and pigs; birds; fish and the like.
- the plasma generating gas examples include rare gases such as helium, neon, argon, and krypton; nitrogen; and the like. These gases may be used alone or in combination of two or more.
- the plasma generating gas preferably contains nitrogen as a main component.
- nitrogen is the main component means that the content of nitrogen in the plasma generating gas is more than 50% by volume. That is, the nitrogen content in the plasma generating gas is preferably more than 50% by volume, more preferably 70% by volume or more, and particularly preferably 90% by volume to 100% by volume.
- the gas components other than nitrogen in the plasma generating gas are not particularly limited, and examples thereof include oxygen and rare gases.
- the invention according to the present embodiment is described above. As described above, in the invention according to the present embodiment, since the second electrode 5 faces a part of the first electrode 4, a high voltage is particularly applied to the electrodes. Suitable for cases. Therefore, it can be said that the invention according to the present embodiment is particularly suitable when the plasma generating gas contains nitrogen gas as a main component.
- the oxygen concentration of the plasma generating gas introduced into the tubular dielectric 3 is preferably 1% by volume or less. If the oxygen concentration is not more than the upper limit, the generation of ozone can be reduced.
- the flow rate of the plasma generating gas introduced into the tubular dielectric 3 is preferably 1 L / min to 10 L / min.
- the flow rate of the plasma generating gas introduced into the tubular dielectric 3 is at least the lower limit value, it is easy to suppress an increase in the temperature of the irradiated surface of the irradiated object.
- the flow rate of the plasma generating gas is not more than the upper limit value, the cleaning, activation or healing of the irradiated object can be further promoted.
- the temperature of the active gas irradiated from the nozzle irradiation port 9a is preferably 50 ° C. or lower, more preferably 45 ° C. or lower, and even more preferably 40 ° C. or lower.
- the temperature of the irradiated surface is likely to be 40 ° C. or less.
- the lower limit of the temperature of the active gas irradiated from the nozzle irradiation port 9a is not particularly limited, and is, for example, 10 ° C. or higher.
- the temperature of the active gas is a value obtained by measuring the temperature of the active gas at the nozzle irradiation port 9a with a thermocouple.
- the distance (irradiation distance) from the nozzle irradiation port 9a to the irradiated surface is preferably, for example, 0.01 mm to 10 mm.
- the irradiation distance is equal to or more than the above lower limit value, the temperature of the irradiated surface can be lowered and the irritation to the irradiated surface can be further alleviated.
- the irradiation distance is not more than the above upper limit value, the effect of healing and the like can be further enhanced.
- the temperature of the irradiated surface at a position separated from the nozzle irradiation port 9a by 1 mm or more and 10 mm or less is preferably 40 ° C. or less.
- the lower limit of the temperature of the irradiated surface is not particularly limited, but is, for example, 10 ° C. or higher.
- the temperature of the irradiated surface is the AC voltage applied between the first electrode 4 and the second electrode 5, the discharge amount of the activated gas to be irradiated, the distance from the tip 4d of the first electrode 4 to the nozzle irradiation port 9a, etc. It can be adjusted by the combination of.
- the temperature of the irradiated surface can be measured using a thermocouple.
- Active species (radicals, etc.) contained in the active gas include hydroxyl radical, singlet oxygen, ozone, hydrogen peroxide, superoxide anion radical, nitric oxide, nitrogen dioxide, peroxynitrite, nitrite peroxide, and trioxide.
- hydroxyl radical singlet oxygen
- ozone hydrogen peroxide
- superoxide anion radical nitric oxide
- nitrogen dioxide peroxynitrite
- nitrite peroxide nitrite peroxide
- trioxide trioxide.
- Nitric oxide and the like can be exemplified.
- the type of active species contained in the active gas can be further adjusted to, for example, the type of plasma generating gas.
- the density of hydroxyl radicals (radical density) in the active gas is preferably 0.1 ⁇ mol / L to 300 ⁇ mol / L.
- the radical density is at least the lower limit value, it is easy to promote the cleaning, activation or healing of abnormalities of the irradiated object selected from cells, biological tissues and individual organisms.
- the radical density is not more than the upper limit value, the irritation to the irradiated surface can be reduced.
- the radical density can be measured by, for example, the following method. 0.2 mL of a 0.2 mol / L solution of DMPO (5,5-dimethyl-1-pyrroline-N-oxide) is irradiated with an active gas for 30 seconds. At this time, the distance from the nozzle irradiation port 9a to the liquid surface is set to 5.0 mm. The hydroxyl radical concentration of the solution irradiated with the active gas is measured by using the electron spin resonance (ESR) method, and this is used as the radical density.
- ESR electron spin resonance
- the density of singlet oxygen (singlet oxygen density) in the active gas is preferably 0.1 ⁇ mol / L to 300 ⁇ mol / L.
- the singlet oxygen density is at least the lower limit value, it is easy to promote the cleaning, activation or healing of abnormalities of irradiated objects such as cells, biological tissues and individual organisms.
- it is not more than the upper limit value, the irritation to the irradiated surface can be reduced.
- the singlet oxygen density can be measured by, for example, the following method. Irradiate 0.4 mL of a 0.1 mol / L solution of TPC (2,2,5,5-tetramethyl-3-pyrroline-3-carboxamide) with an active gas for 30 seconds. At this time, the distance from the nozzle irradiation port 9a to the liquid surface is set to 5.0 mm. The singlet oxygen concentration of the solution irradiated with the active gas is measured by using the electron spin resonance (ESR) method, and this is defined as the singlet oxygen density.
- ESR electron spin resonance
- the flow rate of the active gas irradiated from the nozzle irradiation port 9a is preferably 1 L / min to 10 L / min.
- the flow rate of the active gas irradiated from the nozzle irradiation port 9a is at least the lower limit value, the effect of the active gas acting on the irradiated surface can be sufficiently enhanced.
- the flow rate of the active gas irradiated from the nozzle irradiation port 9a is less than the upper limit value, it is possible to prevent the temperature of the surface to be irradiated with the active gas from rising excessively. In addition, when the irradiated surface is wet, rapid drying of the irradiated surface can be prevented.
- the flow rate of the active gas to be irradiated from the nozzle irradiation port 9a can be adjusted by the amount of plasma generating gas supplied to the tubular dielectric 3.
- the active gas generated by the active gas irradiation device 100 has the effect of promoting healing of trauma and abnormalities. By irradiating a cell, a living tissue or an individual organism with an active gas, the cleansing, activation, or healing of the irradiated portion can be promoted.
- the irradiation frequency When irradiating an active gas for the purpose of promoting healing of trauma or abnormality, there are no particular restrictions on the irradiation frequency, the number of irradiations, and the irradiation period.
- the irradiation conditions such as once to 5 times a day, 10 seconds to 10 minutes each time, 1 day to 30 days, etc. , Preferred from the viewpoint of promoting healing.
- the active gas irradiation device 100 of the present embodiment is particularly useful as an oral treatment instrument and a dental treatment instrument.
- the active gas irradiation device 100 of the present embodiment is also suitable as an instrument for animal treatment.
- FIG. 9 is a cross-sectional view showing the irradiation device 10 according to the first modification.
- the angle ⁇ is not 90 °.
- the contact surface 2 does not include the vertical contact surface 2b.
- the non-vertical contact surface 2a preferably has an angle ⁇ larger than 45 ° with respect to the radial direction d2. In this case, the creepage distance between the first electrode 4 and the external object of the holding member 1 can be made longer than when the angle ⁇ is 45 ° or less.
- FIG. 10 is a cross-sectional view showing the irradiation device 10 according to the second modification.
- the non-vertical contact surface 2a includes a first non-vertical contact surface 2a1 and a second non-vertical contact surface 2a2 separated from the first non-vertical contact surface 2a1 in the radial direction d2.
- each of the first non-vertical contact surface 2a1 and the second non-vertical contact surface 2a2 surrounds the first electrode 4 from the periphery centered on the axis O1.
- the non-vertical contact surface 2a increases the creepage distance between the first electrode 4 and the external object of the holding member 1. be able to.
- FIG. 11 is a perspective view of the first member 1a and the second member 1b according to the third modification.
- FIG. 12 is a cross-sectional view of the irradiation device 10 according to the third modification on a plane passing through the terminal portion 4a and perpendicular to the axis O1.
- a non-vertical contact surface 2a is formed on a part of the circumferential direction centered on the axis O1. Is formed.
- the non-vertical contact surface 2a is located outside the terminal portion 4a in the radial direction d2. In this case, the non-vertical contact surface 2a can effectively suppress a short circuit between the terminal portion 4a and an external object of the holding member 1.
- the first member 1a and the second member 1b have a substantially cylindrical shape, and the first member 1a and the second member 1b are brought into contact with each other to form a storage space 1d.
- An example in which the first member 1a and the second member 1b are lined up in the axial direction d1 has been described.
- the forms of the first member 1a and the second member 1b are not particularly limited as long as they come into contact with each other to form the storage space 1d and the contact surface 2 including the non-vertical contact surface 2a.
- both the first member 1a and the second member 1b have a semi-cylindrical shape.
- a cylindrical shape can be formed by bringing the first member 1a and the second member 1b into contact with each other, and the inside of the cylindrical shape can be used as the storage space 1d.
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Abstract
Description
上述の実施の形態においては、非垂直接触面2aが、径方向d2に対して90°の角度をなしている例について説明した。しかしながら、非垂直接触面2aが径方向d2に対してなす角度θは、これに限られない。図9は、第1の変形例に係る照射器具10を示す断面図である。図9に示す例において、角度θは90°にはなっていない。また、接触面2は垂直接触面2bを含まない。非垂直接触面2aは、径方向d2に対して45°より大きな角度θをなすことが好ましい。この場合、角度θが45°以下の場合よりも、第1電極4と保持部材1の外部の物体との間の沿面距離を、より長くすることができる。
図10は、第2の変形例に係る照射器具10を示す断面図である。図10に示す例において、非垂直接触面2aは、第1非垂直接触面2a1と、第1非垂直接触面2a1から径方向d2に離間した第2非垂直接触面2a2と、を含む。本変形例においては、第1非垂直接触面2a1及び第2非垂直接触面2a2のそれぞれが、軸線O1を中心とした周囲から第1電極4を囲っている。非垂直接触面2aが第1非垂直接触面2a1と第2非垂直接触面2a2とを含むことによって、第1電極4と保持部材1の外部の物体との間の沿面距離を、より長くすることができる。
上述の実施の形態及び各変形例においては、非垂直接触面2aが、軸線O1を中心とした周囲から第1電極4を囲っている例について説明した。しかしながら、非垂直接触面2aの形態は、これに限られない。図11は、第3の変形例に係る第1部材1a及び第2部材1bの斜視図である。図12は、第3の変形例に係る照射器具10の、端子部4aを通り軸線O1に垂直な面における断面図である。
上述の実施の形態及び各変形例においては、第1部材1a及び第2部材1bが略筒状の形状を有し、第1部材1aと第2部材1bとを接触させて収納空間1dを形成する際には第1部材1aと第2部材1bとが軸線方向d1に並ぶ例について説明した。しかしながら、第1部材1a及び第2部材1bの形態は、互いに接触することによって、収納空間1dと、非垂直接触面2aを含む接触面2とを形成する限り、特に限られない。一例として、第1部材1aと第2部材1bとは、ともに半円筒形状を有する。この場合、第1部材1aと第2部材1bとを接触させることによって円筒形状を形成することができ、該円筒形状の内部を収納空間1dとすることができる。
上述の実施の形態及び各変形例においては、第2電極5が電気的に接地されている例について説明した。しかしながら、第2電極5の形態はこれに限られず、第2電極5にも電圧が印加されてもよい。一例として、第1電極4と第2電極5とに、半周期だけずらされた交流が印加される。この場合、上述した第1電極4と接触面2との位置関係は、特に矛盾しない限り、第2電極5と接触面2との位置関係に適用されてもよい。
Claims (13)
- プラズマを生成するために電圧が印加される第1電極と、
前記第1電極を保持する保持部材と、を備え、
前記保持部材は、第1部材及び第2部材を有し、前記第1部材と前記第2部材とが接触することで、前記第1電極を収容する収納空間を構成し、
前記第1部材と前記第2部材との接触面は、前記第1電極の軸線に非垂直な非垂直接触面を含む、照射器具。 - 前記非垂直接触面を通る前記軸線への任意の垂線が、前記非垂直接触面と非平行となる、請求項1に記載の照射器具。
- 前記非垂直接触面は、前記軸線に垂直な径方向に対して45°より大きな角度をなす、請求項1又は2に記載の照射器具。
- 前記非垂直接触面は、前記軸線を中心とした周囲から前記第1電極を囲っている、請求項1乃至3のいずれか一項に記載の照射器具。
- 前記非垂直接触面は、第1非垂直接触面と、前記第1非垂直接触面から前記軸線に垂直な径方向に離間した第2非垂直接触面と、を含む、請求項1乃至4のいずれか一項に記載の照射器具。
- 前記第1電極は、外部の電力源に接続する端子部を有し、
前記非垂直接触面は、前記軸線に垂直な径方向における前記端子部の外方に位置する、請求項1乃至5のいずれか一項に記載の照射器具。 - 前記接触面は、前記軸線に垂直な垂直接触面を含み、
前記垂直接触面は、前記軸線の延びる方向における前記端子部が位置する領域とは異なる領域に位置する、請求項6に記載の照射器具。 - 前記第1電極は、前記軸線に垂直な径方向の外方への突出長さが最も大きくなっている拡径部を有し、
前記非垂直接触面は、前記径方向における前記拡径部の外方に位置する、請求項1乃至7のいずれか一項に記載の照射器具。 - 前記接触面は、前記軸線に垂直な垂直接触面を含み、
前記垂直接触面は、前記軸線の延びる方向における前記拡径部が位置する領域とは異なる領域に位置する、請求項8に記載の照射器具。 - 前記保持部材には、前記第1電極の一部に対向するように第2電極が取り付けられ、
前記非垂直接触面は、前記軸線の延びる方向において前記第2電極が位置する領域とは異なる領域に位置する、請求項1乃至9のいずれか一項に記載の照射器具。 - 電気的に接地され且つ前記第1電極の全体を収容する外筒部材を備え、
前記非垂直接触面は、前記第1電極と前記外筒部材との間に位置する、請求項1乃至10のいずれか一項に記載の照射器具。 - 請求項1乃至11のいずれか一項に記載の照射器具を備える、プラズマ装置。
- プラズマを生成するために電圧が印加される第1電極を保持する保持部材であって、
前記保持部材は、第1部材及び第2部材を有し、前記第1部材と前記第2部材とが接触することで、前記第1電極を収容する収納空間を構成し、
前記第1部材と前記第2部材との接触面は、前記第1電極の軸線に非垂直な非垂直接触面を含む、保持部材。
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EP21770581.3A EP4124179A4 (en) | 2020-03-18 | 2021-03-17 | SUPPORT ELEMENT, IRRADIATION INSTRUMENT AND PLASMA DEVICE |
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