Title of invention: In-body injection device for medical powder
Technical field
[0001]
　The present invention relates to a medical powder injection device used in a surgical operation or the like, and is particularly suitable for medical powder used for injecting powder for adhesion prevention or hemostasis onto a tissue for treatment. Regarding the body injection device.
Background technology
[0002]
　If tissues such as organs damaged by surgical measures such as surgery or tissue collection are left untreated, the damaged parts may adhere to surrounding tissues. Such tissue adhesions cause infertility due to fallopian tube adhesions and intestinal obstruction due to intestinal adhesions, which is a heavy burden on patients, and it is necessary to remove the adhesions during reoperation. It can also cause new damage to the organs. Therefore, conventionally, in order to prevent adhesions in damaged tissues, a film-like adhesion-preventing material that physically covers the wound portion during surgery or the like has been used.
[0003]
　By the way, in recent years, since the burden on patients can be reduced, the number of cases in which surgical measures such as surgery are performed endoscopically is increasing.
[0004]
　However, it has been difficult to use a film-like adhesion-preventing material that has been conventionally used for endoscopic surgery. That is, it is conceivable to roll the film-like adhesion-preventing material into small pieces, insert it into the body through a trocar, and then spread the adhesion-preventing material inside the body to cover the damaged part. However, there is a problem that the film-shaped adhesion-preventing material is liable to crack, and it is difficult to attach the adhesion-preventing material to the correct position to cover the damaged portion.
[0005]
　In view of such a problem, the present inventors, for example, in Japanese Patent Application Laid-Open No. 2017-51545 (Patent Document 1), are medical powders capable of injecting a powdery adhesion-preventing material or the like into the body. We are proposing an in-body injection device for the body. In this way, by injecting an adhesion-preventing material or the like as a powder onto the treatment site, it has become possible to more easily perform treatment with the adhesion-preventing material even under an endoscope. Therefore, the present inventors have conducted further research and developed an injection device capable of injecting medical powder more stably, and have reached the present invention.
Prior art literature
Patent documents
[0006]
Patent Document 1: Japanese Unexamined Patent Publication No. 2017-51545
Outline of the invention
Problems to be solved by the invention
[0007]
　Here, the present invention has been made against the background of the above-mentioned circumstances, and the problem to be solved thereof is to provide a novel structure capable of more stably injecting medical powder. The purpose of the present invention is to provide an in-vivo injection device for medical powder.
Means to solve problems
[0008]
　In the first aspect of the present invention, the medical powder is supplied to the injection passage through which the pressure gas flows through the powder passage, and the medical powder is injected into the body together with the pressure gas through the injection passage for medical use. The internal powder injection device includes a conductive member exposed to the powder passage and a static elimination member exposed to an external space outside the powder passage, and the conductive member and the static elimination member are electrically connected to each other. It is characterized by being done.
[0009]
　According to the in-vivo injection device for medical powder having a structure according to this embodiment, the medical powder is formed in a powder container or powder passage in which the medical powder is housed, and / or powders are connected to each other. The static electricity generated by rubbing against each other is removed by being discharged to an external space, for example, through the conductive member and the static eliminating member exposed in the powder passage. As a result, it is possible to prevent the medical powder from sticking to the powder container or the powder passage or agglomerating the powders due to the action of static electricity, and the medical powder may be clogged in the powder passage, for example. It can be stably injected without doing anything.
[0010]
　A second aspect of the present invention is the medical powder in-body injection device according to the first aspect, which includes a vibration mechanism for vibrating the powder passage.
[0011]
　According to the in-body injection device for medical powder having a structure according to this embodiment, the vibration applied to the powder passage by the vibration mechanism is also applied to the powder container or the like that stores the medical powder. The medical powder is sent from the powder container to the injection passage through the powder passage. Here, the effect of the present invention is effective because the medical powder is more likely to rub against the container or passage and / or the powders are more likely to rub against each other due to the vibration applied by the vibration mechanism. Can be enjoyed.
[0012]
　In the third aspect of the present invention, in the medical powder in-body injection device according to the first or second aspect, the members constituting the powder passage are formed of a thermoplastic resin.
[0013]
　According to the in-vivo injection device for medical powder having a structure according to this aspect, the effect of the present invention can be effectively enjoyed. That is, since the synthetic resin generally has an electrical insulating property, its surface is easily charged. Therefore, when the member constituting the powder passage is a synthetic resin, static electricity is more likely to be generated due to rubbing against the medical powder. However, by removing the static electricity according to the present invention, the medical powder Can be stably injected. As the synthetic resin constituting the powder passage, a thermoplastic resin is suitable because it is advantageous for molding and handling.
[0014]
　A fourth aspect of the present invention is the medical powder in-body injection device according to any one of the first to third aspects, wherein the medical powder is an adhesion preventive material.
[0015]
　According to the in-vivo injection device for medical powder having a structure according to this embodiment, since the medical powder is an adhesion-preventing material, it is stored in a dry state, for example, in a powder container from the viewpoint of stability and the like. Is preferable. In such a dry state, static electricity is more likely to be generated by rubbing the powder against the container, the passage, and / or the powders, so that the effect of the present invention can be effectively enjoyed.
Effect of the invention
[0016]
　According to the in-body injection device for medical powder having a structure according to the present invention, static electricity generated by rubbing the medical powder with the powder container, the powder passage, and / or the powders can be removed. Therefore, it is possible to prevent the medical powder from sticking to the powder container or the powder passage or agglomerate the powders, and the medical powder can be stably ejected without clogging the powder passage. ..
A brief description of the drawing
[0017]
FIG. 1 is a perspective view showing the entire body injection device for medical powder as the first embodiment of the present invention in a state where the powder is injected by operating the pressing portion.
FIG. 2 is a front view of the medical powder in-body injection device shown in FIG.
FIG. 3 is a plan view of the medical powder in-vivo injection device shown in FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG.
5 is a perspective view showing a holding member constituting the internal injection device for medical powder shown in FIG. 1. FIG.
FIG. 6 is a front view of the holding member shown in FIG.
FIG. 7 is a right side view of the holding member shown in FIG.
FIG. 8 is a sectional view taken along line VIII-VIII in FIG.
9 is a perspective view showing a conductive member constituting the internal injection device for medical powder shown in FIG. 1. FIG.
FIG. 10 is a vertical cross-sectional view of a holding member constituting an in-body injection device for medical powder as a second embodiment of the present invention, in which a powder container for accommodating medical powder is attached. The figure which shows.
Mode for carrying out the invention
[0018]
　Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
　First, FIGS. 1 to 4 show an in-body injection device for medical powder (hereinafter, also referred to as an injection device) 10 as a first embodiment of the present invention. The injection device 10 has a substantially syringe shape as a whole, and by gripping the grip portion 12 and operating the piston-shaped pressing portion 14, medical powder is discharged from the tip of the injection nozzle portion 16 together with the pressure gas. It is designed to be injected into the body. In the following description, the axial direction indicates the left-right direction in FIG. 2 in which the injection device 10 extends, and the tip direction indicates the left direction in FIG. 2 which is the tip side of the injection nozzle portion 16. The direction indicates the right direction in FIG. 2 which is the grip portion 12 side. The vertical direction indicates the vertical direction in FIG. 2, and the horizontal direction indicates the vertical direction in FIG.
[0020]
　More specifically, the injection device 10 includes a body portion 20 in which the device main body 18 has a hollow structure and a pressing portion 14 attached to the body portion 20. The apparatus main body 18 has a substantially syringe shape as a whole, and finger hooks 22a and 22b protruding in opposite directions in the left-right direction are formed at the base end portion of the body portion 20. In the present embodiment, the finger hooks 22a and 22b are substantially bow-shaped, respectively, so that the user can easily hook the fingers during use. The body portion 20 has a divided structure in the width direction (vertical direction in FIG. 3), and is formed by overlapping the end faces of half-split cylindrical members and fixing them by adhesion or fitting. There is.
[0021]
　Further, the tip end portion of the piston-shaped pressing portion 14 is inserted into the base end side opening of the body portion 20. The pressing portion 14 can be slidably displaced in the axial direction at the base end portion of the apparatus main body 18, and the outer diameter dimension of the tip is made larger than the inner diameter dimension at the base end of the body portion 20. , The pressing portion 14 is prevented from coming out from the body portion 20 toward the base end side. Further, the base end portion of the pressing portion 14 is an operating portion 24 extending in the left-right direction. The injection device 10 includes a pressing portion 14, an operating portion 24, and finger hooking portions 22a and 22b to form a gripping portion 12.
[0022]
　On the other hand, the tip of the body portion 20 is provided with an injection nozzle portion 16 extending toward the tip side, and the injection nozzle portion 16 extends from the tip side of the soft tube 26 extending in the axial direction to a tubular hard tube 28. Is configured to include a fixed structure. With such a structure, it is possible to easily change the injection direction of the injection nozzle portion 16 by picking the hard tube 28 with forceps or the like during the operation. In the present embodiment, the straightening vane 30 is assembled in the accommodation state at the tip opening of the hard tube 28. The shape of the straightening vane 30 is not particularly limited, but in the present embodiment, it is a twisted plate shape. The injection fluid is guided along the twisting surface of the rectifying plate 30 and is rectified in a spiral shape while being injected to the outside, so that the injected medical powder is centrifugally based on a spiral rotational action. Force is applied to allow the medical powder to diffuse and be ejected over a wider area and substantially uniformly.
[0023]
　An injection passage 32 is provided inside the injection device 10 from the end of the pressing portion 14 to the tip of the injection nozzle portion 16. The base end side portion of the injection passage 32 is composed of an internal passage 34 provided inside the pressing portion 14. The internal passage 34 extends axially from the tip of the pressing portion 14, bends downward at the axial intermediate portion of the pressing portion 14, and extends outward, and the base end of the internal passage 34 serves as a connection port 36. It is open to the outside. A tubular member 40 is connected to the connection port 36 via a flexible tube 38, and in the present embodiment, a filter 42 is provided inside the tubular member 40. The filter 42 allows the pressure gas to pass through and does not allow germs in the pressure gas to pass through. The tubular member 40 communicates with the supply source of the pressure gas to enter the internal passage 34. A sterile pressure gas is supplied. On the other hand, the tip end side portion of the injection passage 32 is composed of an injection nozzle portion 16 including soft and hard tubes 26 and 28.
[0024]
　Further, in the intermediate portion of the injection passage 32, an operating means 44 for switching the injection passage 32 between a communication state and a cutoff state, and a powder supply mechanism 46 for supplying medical powder into the injection passage 32 are provided. .. By operating the operating means 44, it is possible to switch between spraying and stopping the medical powder.
[0025]
　The operating means 44 includes a pressing portion 14 and an opening / closing valve 48, and transmits an external operating force applied to the pressing portion 14 to the opening / closing valve 48 to switch the opening / closing valve 48 and thus the injection passage 32. It is designed to let you. Various known structures can be adopted as the on-off valve 48, but in the present embodiment, a sealing valve is arranged at the tip of the internal passage 34, and a fixed nozzle 50 is provided on the tip side of the sealing valve. The internal passage 34 is communicated with the fixed nozzle 50 by inserting the fixed nozzle 50 into the sealing valve, while the internal passage 34 is sealed by pulling out the fixed nozzle 50. A structure that is blocked is adopted.
[0026]
　Further, a tubular member 52 extending in the axial direction is provided at the tip of the pressing portion 14, and a sealing valve is sandwiched and fixed between the pressing portion 14 and the tubular member 52 by adhesion or the like. On the other hand, the fixed nozzle 50 provided on the tip end side of the sealing valve is fixed inside the proximal end portion of the body portion 20, extends toward the proximal end side, and the extending tip of the fixed nozzle 50 is a tubular member. It has entered the inside of 52. Further, a spring (not shown) is provided in a compressed state at the base end portion of the body portion 20, and the pressing portion 14 is always urged toward the base end side.
[0027]
　As a result, in the initial state, the pressing portion 14 is elastically positioned to the moving end on the base end side, the fixed nozzle 50 and the sealing valve are separated from each other by a predetermined distance, and the opening / closing valve 48 is held in the shutoff state. It is supposed to be done. On the other hand, as shown in FIGS. 1 to 4, by pushing the pressing portion 14 toward the tip side against the urging force, the fixed nozzle 50 is inserted into the sealing valve and the injection passage 32 is in a communicating state. It has become like. Further, by releasing the pushing force on the pressing portion 14, the pressing portion 14 automatically returns to the initial position.
[0028]
　Further, in the body portion 20, the holding member 54 shown in FIGS. 5 to 8 is provided on the tip end side of the fixed nozzle 50. In the present embodiment, the holding member 54 is made of a hard synthetic resin, and at least a portion constituting the powder passage 66 described later is made of polycarbonate which is a thermoplastic resin. In particular, in the present embodiment, in the injection device 10, each member except the soft tube, the O-ring, the spring, and the like is made of polycarbonate, and the holding member 54 is also made of polycarbonate as a whole. However, the synthetic resin forming each member of the injection device 10 is not limited to polycarbonate, and for example, "TRITAN (registered trademark)" manufactured by Eastman, acrylic resin, and the like can be preferably adopted.
[0029]
　The holding member 54 is formed with a relay passage 56 extending in the axial direction, and the tip of the relay passage 56 is directly or indirectly connected to the base end of the soft tube 26, while the relay passage 56. Is directly or indirectly connected to the tip of the fixed nozzle 50. As a result, an injection passage 32 is configured from the internal passage 34 of the pressing portion 14 to the tip of the injection nozzle portion 16 via the fixed nozzle 50 and the relay passage 56. In the present embodiment, the base end of the relay passage 56 and the tip end of the fixed nozzle 50 are indirectly connected by a plurality of flexible tube tubes, tubular members, or the like.
[0030]
　On the other hand, a substantially tubular fixing member 58 is externally fitted and fixed to the base end portion of the soft tube 26, and the base end side of the fixing member 58 is internally fitted and fixed to the substantially tubular support member 60. ing. Here, the fixing member 58 and the support member 60 are set so that they can be attached to and detached from each other, and the medical powder is gelled by the water in the body and clogs inside the injection nozzle portion 16, and the medical powder is used. Even if the body cannot inject, it can be easily solved by replacing the fixing member 58 and the injection nozzle portion 16. Further, the tip end side of the relay passage 56 is internally fitted and fixed to the base end side of the support member 60. As a result, the tip of the relay passage 56 and the base end of the soft tube 26 are indirectly connected. In short, the gas flow path to which the pressure gas is supplied from the external pressure source includes the internal passage 34, the fixed nozzle 50, the relay passage 56, the soft and hard tubes 26 and 28, and the total length of the injection passage 32. The pressure gas is circulated throughout the area.
[0031]
　On the other hand, as the powder supply mechanism 46, the holding member 54 is provided with a container holder 62 exposed upward from the body portion 20, and the container holder 62 is provided with a powder container containing medical powder. 64 is detachably attached. As the powder container 64, various shapes and sizes are adopted according to the type of medical powder to be used, and the shape and size of the container holder 62 are also used in the powder container 64 to be adopted. It is set appropriately according to it. In particular, the present invention does not limit the medical powder to be used, and can be applied to medical powders such as anti-adhesion materials, hemostatic materials and various chemicals, and is adopted accordingly. The powder container 64 and the container holder 62 to be formed can also be appropriately set. The material of the powder container 64 is not limited in any way, and any conventionally known material of the container such as glass or a hard synthetic resin can be adopted. In this embodiment, an adhesion-preventing material containing PGA (polyglutamic acid) is used as a medical powder. PGA is composed of a carboxylic acid and is likely to generate electrons, so that static electricity is likely to be generated, and the effects of the present invention can be enjoyed more effectively.
[0032]
　Further, the holding member 54 is formed with a powder passage 66 extending from the formed portion of the container holder 62 toward the relay passage 56. In the present embodiment, the powder passage 66 extends substantially straight in the vertical direction, and the upper portion of the powder passage 66 on the powder container 64 side extends substantially straight with a larger inner diameter than the lower portion. On the other hand, the lower portion of the powder passage 66 on the relay passage 56 side has an inner diameter smaller toward the relay passage 56. Then, by mounting the powder container 64 on the container holder 62 with its opening facing downward, the inside of the powder container 64 is communicated with the relay passage 56 through the powder passage 66 and accommodated in the powder container 64. The medical powder is supplied to the relay passage 56. The shape of the powder passage 66 is not limited in any way, and may extend straight over the entire length in the length direction, or may be partially or wholly bent or curved. Further, the powder passage 66 may be formed so as to be inclined with respect to the vertical direction.
[0033]
　Furthermore, the holding member 54 is equipped with a vibration mechanism 68. As the vibrating mechanism 68, conventionally known ones such as those described in JP2012-143502 can be adopted. That is, the eccentric rotating body 70 is rotatably assembled to the lower part of the holding member 54 around the central axis, and the eccentric rotation is caused by the fluid pressure exerted through the branch passage 72 branched from the tip side of the fixed nozzle 50. The body 70 is rotationally driven. Here, the center of gravity of the eccentric rotating body 70 is set eccentrically from the rotation center axis, and fluid pressure is applied to the serrated pressure receiving surface provided on the outer peripheral surface to rotate around the rotation center axis. As a result, the holding member 54 and the powder container 64 mounted on the holding member 54 are vibrated at a frequency corresponding to the rotation cycle. Then, by vibrating the powder container 64, clogging of the medical powder inside the powder container 64, the powder passage 66, etc. is prevented, and the relay passage 56 of the medical powder as described above is reached. The supply of powder is becoming more stable.
[0034]
　Here, as shown in FIGS. 5 to 8, the holding member 54 of the present embodiment includes a conductive member 74 having conductivity and a static elimination member 76 that removes electricity by discharging electricity into the atmosphere (space), for example. And are provided.
[0035]
　The material of the conductive member 74 is not limited as long as it has conductivity. In this embodiment, the material is made of stainless steel (SUS), but in addition to metal, a conductive resin or conductive material is used. Rubber and the like can also be adopted. Further, the shape of the conductive member 74 is not limited in any way, and a mesh shape or the like can be adopted, but in the present embodiment, it is a thin rectangular plate shape as shown in FIG. In the present embodiment, the conductive member 74 is arranged in a state of being substantially embedded in the holding member 54 in the vertical intermediate portion of the powder passage 66, and specifically, the powder passage 66 has a large diameter. It is provided at the boundary between the upper portion and the lower portion having a smaller diameter toward the lower side. A substantially semicircular notch 78 having a curvature substantially equal to that of the inner peripheral surface of the powder passage 66 is formed on one side portion of the conductive member 74, and a part of the conductive member 74 (particularly). The inner peripheral surface 79) of the notch 78 is exposed on the powder passage 66, and the other part of the conductive member 74 (particularly the side portion opposite to the side where the notch 78 is provided) is held. It is exposed on the outer peripheral surface of the member 54. In this embodiment, the conductive member 74 is provided with a through hole 80 for filling a molding material, and the holding member 54 is insert-molded in a state where the conductive member 74 is set inside the mold. However, for example, the holding member and the conductive member may be formed separately and reassembled.
[0036]
　On the other hand, the material of the static elimination member 76 is not limited as long as electricity can be removed by, for example, discharging into the atmosphere, and is formed of, for example, a conductive polymer. The method of removing electricity by the static elimination member 76 is not limited to discharge to the atmosphere, but in the present embodiment, electricity is removed by corona discharge. Further, the shape of the static elimination member 76 is not limited in any way, but in the present embodiment, the shape of the static elimination member 76 is a substantially tapered cylinder shape in which the diameter gradually decreases downward as a whole. That is, in the present embodiment, the sheet-shaped static elimination member 76 is wound and fixed at a position corresponding to the lower portion of the powder passage 66 on the outer peripheral surface of the holding member 54. Then, the static elimination member 76 is exposed in the external space 82 (in the present embodiment, the internal space of the body portion 20) outside the powder passage 66. The static elimination member 76 may be exposed in a space located outside the powder passage 66, and may not be exposed in a space outside the injection device 10. Further, in the present embodiment, "Denkitol (registered trademark)" manufactured by Nippon Baileen Co., Ltd. is used as the static elimination member 76. For example, "Electromesh (trade name)" manufactured by 100th Telecommunications Industry Co., Ltd. "Discharge-kun Paper (trade name)" manufactured by Nippon Vacuum Packaging Machinery Co., Ltd. can also be adopted.
[0037]
　Then, in the present embodiment, the static elimination member 76 is fixed to the outer peripheral surface of the holding member 54, and is in direct contact with the lower surface of the portion of the conductive member 74 exposed on the outer peripheral surface of the holding member 54. It is electrically connected. The conductive member and the static elimination member may be arranged apart from each other, or may be indirectly connected by a conductive member and electrically connected.
[0038]
　In the injection device 10 of the present embodiment having such a shape, the palm, more specifically, the base portion of the thumb on the palm side and the operation portion 24 of the pressing portion 14 are overlapped with each other while hooking the fingers on the finger hook portions 22a and 22b. The grip portion 12 is gripped. Then, the pressing portion 14 is pushed toward the tip side by the palm of the hand to switch the injection passage 32 to the communicating state, so that the medical powder contained in the powder container 64 is ejected from the tip opening of the injection nozzle portion 16. Can be done. That is, as shown in FIGS. 1 to 4, when the pressing portion 14 is pushed toward the tip side, the on-off valve 48 held in the closed state is opened and the entire length of the injection passage 32 is in the communicating state. And the pressure gas is supplied through the gas flow path. On the other hand, along with this, the pressure gas is supplied to the excitation mechanism 68 through the branch passage 72 branching from the fixed nozzle 50, so that the eccentric rotating body 70 rotates and the excitation force is continuously generated. , The medical powder in the powder container 64 is gradually sent out into the injection passage 32, and is injected to the outside from the tip opening of the injection nozzle portion 16 together with the pressure gas flowing through the injection passage 32. ..
[0039]
　On the other hand, when the pushing force of the pressing portion 14 is released, the pressing portion 14 returns to the initial position due to the urging force of the spring provided in the body portion 20, so that the opening / closing valve 48 held in the open state is closed. The injection passage 32 is shut off. As a result, the supply of the pressure gas into the injection passage 32 is stopped, so that the injection of the medical powder to the outside is also stopped.
[0040]
　In short, the injection passage 32 is switched between a communication state and a cutoff state by the operating means 44. That is, the supply and stop of the pressure gas in the injection device 10 are switched by the operating means 44. Here, if the injection passage 32 is in the communicating state, the medical powder is injected, while if the injection passage 32 is in the blocking state, the injection of the medical powder is stopped. Therefore, the operating means 44 is used. It also switches between injection and stop of injection of medical powder.
[0041]
　In the medical powder in-body injection device 10 of the present embodiment having the above-mentioned structure, the conductive member 74 is arranged in a state of being exposed on the powder passage 66, and the static eliminator member 76 is arranged in the powder passage 66. Since the conductive member 74 and the static eliminator member 76 are electrically connected to each other in a state of being exposed to the outside external space 82, the medical powder can be contained in the powder container 64 or the powder container 64 or the like. The static electricity generated by the powder passage 66 and / or the medical powder rubbing against each other is discharged to the external space 82 outside the powder passage 66 by the static eliminator member 76 through the conductive member 74. Therefore, the medical powder is prevented from sticking to or agglomerating on the powder container 64 or the powder passage 66 due to the action of static electricity, and the medical powder is stably injected through the injection passage 32. obtain.
[0042]
　In particular, in the present embodiment, the holding member 54 is equipped with a vibration mechanism 68, and the medical powder is generated in the powder container 64 or the powder passage 66 by the vibration applied by the vibration mechanism 68. It is agitated. As a result, the medical powder further rubs against the powder container 64 and the powder passage 66, and / or the medical powders against each other, so that more static electricity is generated. Therefore, by removing static electricity as described above, the medical powder can be sprayed more stably.
[0043]
　Further, in the present embodiment, since the holding member 54 constituting the powder passage 66 is made of polycarbonate which is a thermoplastic resin, the surface of the powder passage 66 is easily charged. As a result, static electricity is more likely to be generated by the rubbing of the powder passage 66 with the medical powder, but by removing the static electricity as described above, the medical powder can be jetted more stably.
[0044]
　Further, in the present embodiment, an adhesion preventive material containing PGA is adopted as a medical powder. In particular, in the present embodiment, from the viewpoint of stability, it is preferable that the medical powder is contained in the powder container 64 in a dry state and injected from the injection passage 32, but PGA contains a carboxylic acid. Therefore, the transfer of electrons is likely to occur, and static electricity is more likely to be generated in a dry state. Even in such a case, by removing static electricity as described above, the medical powder can be ejected even more stably.
[0045]
　Next, FIG. 10 shows a holding member 54 constituting an in-body injection device for medical powder as a second embodiment of the present invention in a state where a powder container 64 is attached. In the present embodiment, the shape of the holding member 54 is substantially the same as that of the first embodiment, but the shape of the conductive member 84 provided on the holding member 54 is different from that of the first embodiment. In the present embodiment, the members and parts substantially the same as those in the first embodiment are designated by the same reference numerals as those in the first embodiment in the drawings, and detailed description thereof will be omitted.
[0046]
　That is, the conductive member 84 of the present embodiment has a substantially ring shape, and the conductive member 84 is arranged in a state of being substantially embedded in the holding member 54 in the vertical intermediate portion of the powder passage 66. As a result, a part of the conductive member 84 (particularly the inner peripheral surface) is exposed on the powder passage 66, and the other part of the conductive member 84 (particularly the outer peripheral portion of the lower surface) is exposed on the outer periphery of the holding member 54. It is exposed on the surface.
[0047]
　Further, as in the first embodiment, the sheet-shaped static elimination member 76 is wound and fixed at a position corresponding to the lower portion of the powder passage 66 on the outer peripheral surface of the holding member 54. On the outer peripheral surface of the holding member 54, the exposed portion of the conductive member 84 and the static elimination member 76 are in direct contact with each other and are electrically connected.
[0048]
　Therefore, even when the conductive member 84 has the above-mentioned shape, the static electricity generated in the powder passage 66 passes through the conductive member 84 and the static eliminator member 76 into the external space 82 outside the powder passage 66. Since it is discharged, the same effect as that of the first embodiment can be exhibited.
[0049]
　Although the embodiments of the present invention have been described in detail above, the present invention is not limitedly interpreted by the specific description in the embodiments.
[0050]
　For example, in the above-described embodiment, the conductive members 74 and 84 are arranged in a substantially plate shape or a substantially ring shape and are substantially embedded in the holding member 54, and the static elimination member 76 has a substantially tapered tubular shape. Although it was fixed to the outer peripheral surface of the holding member 54, the arrangement position of the conductive member and the static elimination member is a space in which the conductive member is exposed on the powder passage and the static elimination member can discharge outside the powder passage. As long as it is exposed to, there is no limitation. That is, for example, the conductive member may be arranged by sticking to a portion in contact with the powder such as the inner peripheral surface of the holding member constituting the powder passage, or in addition to or in place of the powder passage of the above embodiment. It may be provided in the powder passage in the powder container. Further, the static elimination member may be provided on the inner peripheral surface or the outer peripheral surface of the body portion in place of or in addition to the outer peripheral surface of the holding member, and may be electrically connected to the conductive member through an appropriate conductive member. Good. That is, these conductive members and the static elimination member may be fixed to each other, if necessary, in a state of direct contact, for example, or fixed to each other by a conductive member in a contact state or a non-contact state. You may. Further, for example, by forming an arbitrary powder passage forming member exposed to the external space and assembled with a conductive member such as metal, it is possible to implement the electrically connected conductive member and the static elimination member. That is, the conductive member and the static elimination member can be composed of a single member.
[0051]
　Further, in the above-described embodiment, the injection device 10 has a substantially syringe shape as a whole, but the shape of the injection device is not limited in any way. That is, the shape of the injection device is described in, for example, JP-A-2017-51545 (Patent Document 1), JP-A-2016-22259, JP-A-2014-140557, etc., in addition to those described in the above-described embodiment. Any of these can be adopted.
[0052]
　Furthermore, in the above-described embodiment, the injection nozzle portion 16 is configured to include the soft tube 26 so that the injection direction of the medical powder can be easily changed, but it is composed of, for example, only a hard tube. Also, the mechanism for changing the injection direction is not essential. Further, in the above-described embodiment, the fixing member 58 and the support member 60 are detachable from each other, and can be replaced when, for example, the injection nozzle portion 16 is clogged. On the other hand, they may be integrally formed and cannot be exchanged. In that case, it is preferable to separately provide a mechanism for removing the clogging of the medical powder.
[0053]
　Further, in the present invention, a vibration mechanism for vibrating the powder passage is not essential. That is, medical powder may be supplied from the powder container to the injection passage through the powder passage, for example, by the action of gravity.
[0054]
　Furthermore, in the above-described embodiment, the powder container 64, which is separate from the injection device 10, is separately attached, but the powder container capable of accommodating the medical powder is integrally attached to the injection device. It may be formed or supplied from an external powder container. Even in such a case, the passage from the portion accommodating the medical powder to the injection passage is regarded as the powder passage.
[0055]
　Further, in the present invention, the pressure gas is supplied from the outside, but for example, a cylinder of the pressure gas may be built in the injection device.
Code description
[0056]
10: Internal injection device for medical powder, 32: Injection passage, 66: Powder passage, 68: Vibration mechanism, 74, 84: Conductive member, 76: Static elimination member, 82: External space
The scope of the claims
[Claim 1]
　Is supplied to the injection passage medical powder to flow of pressurized gas through the powder passage in the body injector medical powder the medical powder is injected into the body through the injection passage with pressurized gas,
　the A medical treatment characterized in that a conductive member exposed to the powder passage and a static elimination member exposed to an external space outside the powder passage are provided, and the conductive member and the static elimination member are electrically connected to each other. In-body injection device for powder.
[Claim 2]
　The in-body injection device for medical powder according to claim 1, further comprising a vibration mechanism for vibrating the powder passage.
[Claim 3]
　The in-body injection device for medical powder according to claim 1 or 2, wherein the member constituting the powder passage is made of a thermoplastic resin.
[Claim 4]
　The in-body injection device for medical powder according to any one of claims 1 to 3, wherein the medical powder is an adhesion preventive material.