JP6072391B1 - Capsule ejection device and capsule ejection system - Google Patents

Abstract

Provided are a capsule release device and a capsule release system capable of accurately arranging a capsule endoscope in a large intestine with a simple operation. The capsule discharge device 20 is provided on the distal end side of the tubular portion 211, and has a tubular distal end portion 212 in which the inner diameter of the end portion on the side not in contact with the tubular portion 211 is equal to or smaller than the outer diameter of the capsule endoscope 10, A cylinder portion 21 provided on the outer peripheral side of the proximal end side of the cylindrical portion 211 and having a positioning portion 213 for determining a position where the capsule endoscope 10 is inserted into the subject; An insertion portion 221 that is slidably inserted, a pressing portion 222 that is provided on the distal end side of the insertion portion 221, has an outer diameter larger than the outer diameter of the insertion portion 221 and smaller than the inner diameter of the cylindrical portion 211, and insertion A piston portion 22 provided on the base end side of the portion 221 and having an operation portion 223 larger than the outer diameter of the insertion portion 221.

Description

  The present invention relates to a capsule release device and a capsule release system for releasing a capsule endoscope and inserting the capsule endoscope into a subject.

  Conventionally, since a capsule endoscope is taken orally, it takes a considerable time to reach the large intestine from the mouth of the subject. For this reason, conventionally, a technique for observing the large intestine by inserting a capsule endoscope from the anus of a subject is known (see Patent Document 1). In this technique, a capsule endoscope is inserted into the large intestine of the subject by inserting a guide wire that holds the capsule endoscope into the anus of the subject via the endoscope.

Japanese Patent Laying-Open No. 2005-230449

  However, in Patent Document 1 described above, since the capsule endoscope is inserted into the subject via the endoscope and placed, it is difficult to accurately position the capsule endoscope with respect to the subject. . Further, the above-described Patent Document 1 has a problem in that work is complicated because many tools are necessary for inserting the capsule endoscope into the subject.

  The present invention has been made in view of the above, and an object of the present invention is to provide a capsule release device and a capsule release system capable of accurately arranging a capsule endoscope in the large intestine with a simple operation. .

  In order to solve the above-described problems and achieve the object, a capsule discharge device according to the present invention includes a cylindrical cylindrical portion having an inner diameter larger than an outer diameter of a capsule endoscope that can be introduced into a subject, A tubular distal end provided on the distal end side of the cylindrical portion and having an inner diameter of an end portion not in contact with the cylindrical portion that is equal to or smaller than an outer diameter of the capsule endoscope; and a predetermined distance from the distal end portion A cylinder portion having a positioning portion provided on an outer peripheral side of the proximal end side of the cylindrical portion for determining a position for inserting the capsule endoscope with respect to the subject; An insertion portion that is slidably inserted; a pressing portion that presses the capsule endoscope toward the distal end portion; and a proximal end side of the insertion portion that is gripped by an operator to hold the pressing portion A piston portion having an operation portion for pushing into the distal end side. It is characterized in.

  In the capsule discharge device according to the present invention, in the above invention, the distal end portion gradually decreases in inner diameter from the distal end side of the cylindrical portion, and the thickness in the thickness direction gradually increases from the distal end side of the cylindrical portion. The operation portion is larger than the outer diameter of the insertion portion.

  In the capsule discharge device according to the present invention, in the above invention, at least a part of the positioning portion extends toward an outer peripheral side of the cylindrical portion on the proximal end side of the cylindrical portion. It is characterized by.

  Further, in the capsule discharge device according to the present invention, in the above invention, the capsule endoscope has an imaging unit that images the subject, and the distal end portion has a longitudinal direction of the capsule endoscope. The cylindrical portion is held so as to coincide with the longitudinal direction of the cylindrical portion, and the imaging direction of the imaging portion is held toward the insertion direction of the subject.

  Moreover, the capsule discharge device according to the present invention is characterized in that, in the above-described invention, the capsule discharge device further includes a lubricant disposed between the distal end portion and the capsule endoscope.

  Moreover, the capsule discharge device according to the present invention further includes a reduced diameter portion provided on the inner peripheral side of the cylindrical portion in the above invention, wherein the pressing portion has an outer diameter larger than an outer diameter of the insertion portion, and The inner diameter of the reduced diameter portion is smaller than the outer diameter of the pressing portion and smaller than the outer diameter of the insertion portion.

  Further, in the above invention, the capsule discharge device according to the present invention is provided on the inner peripheral side of the cylindrical portion, is smaller than the outer diameter of the pressing portion, and gradually increases in inner diameter from the distal end side of the cylindrical portion. The claw portion further formed with an inclined and elastically deformable claw portion, the claw portion abuts on the pressing portion, and at least one of the pressing portion or the claw portion elastically deforms and passes the pressing portion, The pressing portion presses the capsule endoscope after passing through the claw portion.

  The capsule discharge device according to the present invention is characterized in that, in the above invention, the capsule discharge device further includes a support member disposed between the claw portion and the tip portion and supporting the capsule endoscope in the axial direction. To do.

  The capsule discharge device according to the present invention further includes a holding state releasing unit that releases the state in which the distal end portion holds the capsule endoscope by an operation of inserting the insertion unit. It is characterized by that.

  In the capsule discharge device according to the present invention, in the above invention, the holding state release portion is provided on an inner peripheral side of the cylindrical portion, is smaller than an outer diameter of the distal end portion, and gradually from the distal end side of the cylindrical portion. And a groove portion provided on the outer peripheral side of the cylindrical portion corresponding to the portion provided with the claw portion.

  Further, in the capsule discharge device according to the present invention, in the above invention, the cylindrical portion is accommodated in a cylindrical first cylindrical member and the first cylindrical member, and the first cylindrical member A second cylindrical member that is slidable with respect to the first cylindrical member, and a first stopper that maintains a state in which the second cylindrical member is extended from the first cylindrical member. A first insertion member having a shape, a second insertion member housed in the first insertion member and slidable with respect to the first insertion member, and the second insertion member from the first insertion member And a second stopper portion that maintains the extended state.

  In the capsule discharge device according to the present invention as set forth in the invention described above, a plurality of the first stopper portions are provided at predetermined intervals on the outer peripheral side of the second cylindrical member.

  In the capsule discharge device according to the present invention as set forth in the invention described above, the first cylindrical member is provided with a plurality of holes communicating the inner peripheral side and the outer peripheral side.

  A capsule discharge system according to the present invention includes the capsule discharge device and the capsule endoscope.

  According to the present invention, there is an effect that the capsule endoscope can be accurately inserted into the large intestine with a simple operation.

FIG. 1 is a diagram illustrating a configuration example of a capsule endoscope system according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram showing an example of the internal structure of the capsule endoscope according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a schematic configuration of the capsule discharge device according to Embodiment 1 of the present invention. FIG. 4A is a diagram schematically showing a process for releasing the capsule endoscope into the subject using the capsule releasing apparatus according to Embodiment 1 of the present invention. FIG. 4B is a diagram schematically illustrating a process for releasing the capsule endoscope into the subject using the capsule discharge device according to Embodiment 1 of the present invention. FIG. 4C is a diagram schematically illustrating a process for releasing the capsule endoscope into the subject using the capsule discharge device according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to a modification of the first embodiment of the present invention. FIG. 6 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Embodiment 2 of the present invention. FIG. 7A is a diagram schematically showing a process for releasing a capsule endoscope into a subject using the capsule releasing apparatus according to Embodiment 2 of the present invention. FIG. 7B is a diagram schematically showing processing for releasing the capsule endoscope into the subject using the capsule releasing apparatus according to Embodiment 2 of the present invention. FIG. 7C is a diagram schematically showing a process for releasing the capsule endoscope into the subject using the capsule releasing apparatus according to Embodiment 2 of the present invention. FIG. 8 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to a modification of the second embodiment of the present invention. FIG. 9A is a diagram schematically showing a process for releasing a capsule endoscope into a subject using a capsule releasing apparatus according to a modification of the second embodiment of the present invention. FIG. 9B is a diagram schematically showing a process for releasing the capsule endoscope into the subject using the capsule discharge device according to the modification of the second embodiment of the present invention. FIG. 10 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Embodiment 3 of the present invention. FIG. 11A is a diagram schematically showing a process for releasing a capsule endoscope into a subject using the capsule releasing apparatus according to Embodiment 3 of the present invention. FIG. 11B is a diagram schematically showing a process for releasing the capsule endoscope into the subject using the capsule releasing apparatus according to Embodiment 3 of the present invention. FIG. 12 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Embodiment 4 of the present invention. FIG. 13: is sectional drawing which shows schematic structure of the capsule discharge | release apparatus which concerns on Embodiment 4 of this invention. FIG. 14 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Modification 1 of Embodiment 4 of the present invention. FIG. 15 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Modification 1 of Embodiment 4 of the present invention. FIG. 16: is sectional drawing which shows schematic structure of the capsule discharge | release apparatus of the modification 2 of Embodiment 4 of this invention. FIG. 17 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Modification 2 of Embodiment 4 of the present invention.

  Hereinafter, a capsule endoscope system according to an embodiment of the present invention will be described with reference to the drawings. In the following description, a capsule endoscope that is introduced together with an isotonic solution from the anus of the subject and moves in the subject by magnetic induction is illustrated, but it moves by peristaltic movement from the esophagus to the anus of the subject. Various capsule endoscopes such as a capsule endoscope that images the inside of the digestive tract or a self-propelled capsule endoscope that can self-propell in the subject can be used. Moreover, in the following description, each figure has shown only the shape, magnitude | size, and positional relationship roughly to such an extent that the content of this invention can be understood. Therefore, the present invention is not limited only to the shape, size, and positional relationship exemplified in the drawings. In the description of the drawings, the same portions are denoted by the same reference numerals.

(Embodiment 1)
[Configuration of capsule endoscope system]
FIG. 1 is a diagram illustrating a configuration example of a capsule endoscope system according to Embodiment 1 of the present invention. A capsule endoscope system 1 shown in FIG. 1 wirelessly transmits an image signal (image information) that is inserted into the large intestine of a subject 2 via a capsule release device, which will be described later, and acquired by imaging the inside of the subject 2. A capsule endoscope 10 that detects the position of the capsule endoscope 10 through a plurality of sense coils 11a provided below the bed 3 on which the subject 2 is placed; A magnetic field generator 12 that generates a magnetic field acting on the capsule endoscope 10, a signal processor 13 that processes a signal output from the position detector 11, and a signal for operating the magnetic field generator 12 are generated. In order to guide and operate the signal generating device 14, the receiving device 15 that receives the image signal wirelessly transmitted from the capsule endoscope 10 via the plurality of receiving antennas 15a, and the capsule endoscope 10. Based on the operation input device 16, the image signal received by the receiving device 15, a control device 17 that performs processing for displaying an image in the subject 2 (hereinafter referred to as “in-vivo image”), an in-vivo image, and the like Display device 18 for displaying the information. The bed 3 is arranged such that the upper surface (the surface on which the subject 2 is placed) is parallel to the horizontal surface (the surface perpendicular to the direction of gravity). In the following, the longitudinal direction of the bed 3 is the X direction, the short direction of the bed 3 is the Y direction, and the vertical direction (gravity direction) is the Z direction. In the first embodiment, the magnetic field generator 12 functions as a magnetic field generator.

[Configuration of capsule endoscope]
Next, the configuration of the capsule endoscope 10 will be described. FIG. 2 is a schematic diagram illustrating an example of the internal structure of the capsule endoscope 10. The capsule endoscope 10 shown in FIG. 2 captures a capsule-type casing 101 that is an exterior formed in a size that can be easily introduced into the subject 2 and an imaging that generates an image signal by imaging the subject 2. Unit 102, a wireless communication unit 103 that wirelessly transmits an image signal generated by the imaging unit 102 to the outside, a power supply unit 104 that supplies power to each component of the capsule endoscope 10, and a capsule endoscope A magnetic field generator 105 that generates an alternating magnetic field for position detection 10, a permanent magnet 106 that enables magnetic induction by the magnetic field generator 12, and a controller that controls each component of the capsule endoscope 10. 107.

  The capsule-type casing 101 is an exterior case formed to have a size that can be introduced into the organ of the subject 2 and is realized by closing both side opening ends of the cylindrical casing 111 with dome-shaped casings 112 and 113. Is done. The dome-shaped housing 112 is a dome-shaped optical member that is transparent to light in a predetermined wavelength band such as visible light. The cylindrical casing 111 and the dome-shaped casing 113 are colored casings that are substantially opaque to visible light. As shown in FIG. 2, the capsule-type casing 101 formed by the cylindrical casing 111 and the dome-shaped casings 112 and 113 includes an imaging unit 102, a wireless communication unit 103, a power supply unit 104, and a magnetic field generation unit 105. The permanent magnet 106 and the control unit 107 are contained in a liquid-tight manner.

  The imaging unit 102 includes an illumination unit 114 such as an LED (Light Emitting Diode), an optical system 115 such as a condenser lens, and an imaging element 116 such as a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD). Have. The illumination unit 114 emits illumination light such as white light to the imaging field of the imaging element 116 under the control of the control unit 107, and illuminates the subject 2 in the imaging field through the dome-shaped housing 112. The optical system 115 focuses the reflected light from the imaging field of view on the imaging surface of the imaging element 116 to form a subject image. The optical system 115 is configured using at least one lens. The image sensor 116 receives reflected light from the imaging field focused on the imaging surface, and photoelectrically converts the received optical signal, thereby representing an object image in the imaging field, that is, an in-vivo image of the subject 2. Generate a signal.

  In the present embodiment, only one imaging unit 102 is provided in the capsule endoscope 10, but the imaging unit 102 is also provided on the dome-shaped casing 113 side, and the axis La of the capsule endoscope 10 is provided. It is good also as a structure which can image the front and back of. In this case, the dome-shaped casing 113 is also formed by an optical member that is transparent to light of a predetermined wavelength band such as visible light. In this case, in the two imaging units 102, each optical axis is substantially parallel or substantially coincident with the axis La that is the central axis in the longitudinal direction of the capsule casing 101, and the imaging fields of view are directed in opposite directions. Are arranged as follows.

  The wireless communication unit 103 sequentially wirelessly transmits the image signal generated by the imaging unit 102 to the outside via an antenna (not shown). Specifically, the wireless communication unit 103 acquires the image signal generated by the imaging unit 102 from the control unit 107, and performs signal processing such as modulation on the image signal to generate a wireless signal. The wireless communication unit 103 transmits this wireless signal to the receiving device 15 provided outside the subject 2.

  The power supply unit 104 is a power storage unit such as a button-type battery or a capacitor, and includes a magnetic switch, an optical switch, or a switch unit (not shown) that can be switched by a command from the control unit 107. The power supply unit 104 receives a high-frequency signal having a specific pattern as a command for switching the switch unit applied from the outside, for example, via the wireless communication unit 103, and the power is turned on / off by the control of the control unit 107 based on the high-frequency signal. The state is switched, and the power of the power storage unit is supplied to each unit of the capsule endoscope 10 in the on state. Moreover, the power supply part 104 stops the electric power supply to each part of the capsule endoscope 10 in an OFF state.

  The magnetic field generation unit 105 includes a transmission coil that forms a part of the resonance circuit and generates a magnetic field when a current flows, and a capacitor that forms a resonance circuit together with the transmission coil, and supplies power from the power supply unit 104. In response, an alternating magnetic field having a predetermined frequency is generated.

  The permanent magnet 106 is fixedly arranged inside the capsule endoscope 10 so that the magnetization direction has an inclination with respect to the axis La. In the first embodiment, the permanent magnet 106 is arranged so that the magnetization direction is orthogonal to the axis La. The permanent magnet 106 operates following a magnetic field applied from the outside. As a result, magnetic guidance of the capsule endoscope 10 by the magnetic field generator 12 described later is realized.

  The control unit 107 is configured using a CPU (Central Processing Unit) or the like, controls each operation of the imaging unit 102 and the wireless communication unit 103, and controls input / output of signals between these respective components. Specifically, every time the image sensor 116 generates an image signal, the control unit 107 acquires the image signal, performs predetermined signal processing, and further wirelessly sequentially transmits the image signal to the outside in time series. The wireless communication unit 103 is controlled to transmit.

[Configuration of capsule discharge device]
Next, the structure of the capsule discharge device for inserting and releasing the capsule endoscope 10 into the subject 2 will be described. FIG. 3 is a cross-sectional view showing a schematic configuration of the capsule discharge device. The capsule discharge device 20 shown in FIG. 3 is used as a disposable system in a state where the capsule endoscope 10 and a lubricant are loaded.

  The capsule discharge device 20 shown in FIG. 3 accommodates the capsule endoscope 10 therein and is inserted into the large intestine of the subject 2 via the anus of the subject 2. The piston part 22 inserted slidably and the lubricant 23 for moving the capsule endoscope 10 smoothly are provided. The lubricant 23 is configured using a material applicable to a living body such as glycerin, petrolatum, gel, and lidocaine jelly.

  The cylinder part 21 includes a cylinder part 211, a tip part 212, a positioning part 213, and a reduced diameter part 214. The cylindrical portion 211, the tip portion 212, the positioning portion 213, and the reduced diameter portion 214 are formed using an elastically deformable resin or the like. This formation may be an integral formation.

  The cylinder part 211 has a cylindrical shape. The cylindrical portion 211 has an inner diameter larger than the outer diameter of the capsule endoscope 10 that can be introduced into the subject. The cylindrical portion 211 is formed with a predetermined length so that the distal end portion 212 is disposed at a desired site of the large intestine of the subject 2.

  The distal end portion 212 is provided on the distal end side of the tubular portion 211 and has a tubular shape in which the inner diameter of the end portion on the side not in contact with the tubular portion is equal to or smaller than the outer diameter of the capsule endoscope 10. Specifically, the distal end portion 212 has a tubular shape that is equal to or smaller than the outer diameter of the capsule endoscope 10, and the inner diameter gradually decreases from the distal end side of the cylindrical portion 211, and the thickness of the cylindrical portion 211 increases. It gradually decreases from the tip side of the. The distal end portion 212 is configured to hold the capsule endoscope 10 on the inner diameter side thereof. In addition, the distal end portion 212 holds the longitudinal axis La of the capsule endoscope 10 and the longitudinal direction of the cylindrical portion 211 so as to coincide with each other and controls the imaging direction of the imaging unit 102 of the capsule endoscope 10. The sample 2 is held in the direction of insertion. An inner diameter D2 of the distal end portion 212 is smaller than an inner diameter D1 of the cylindrical portion 211.

  The positioning portion 213 is provided on the outer peripheral side of the proximal end side of the cylindrical portion 211 at a position having a predetermined length from the distal end portion 212, and determines the position where the capsule endoscope 10 is inserted into the subject 2. It becomes the standard. Here, the predetermined length is a length set by taking into account the distance from the anus of the subject 2 to a predetermined position, for example, the colon. The positioning portion 213 has a flange shape, and is provided extending toward at least the outer peripheral side of the tubular portion 211 on the proximal end side of the tubular portion 211. The positioning portion 213 may be configured to extend not only in a flange shape but only in a part of the outer periphery, or only as a display that clearly indicates the insertion position such as a line, a symbol, a mark, or a character. It is good also as a structure which does not provide.

  The reduced diameter portion 214 is provided on the inner peripheral side of the cylindrical portion 211 corresponding to the portion where the positioning portion 213 is provided. The reduced diameter portion 214 has an inner diameter that is smaller than the outer diameter of the pressing portion 222 of the piston portion 22 described later and larger than the outer diameter of the insertion portion 221. The reduced diameter portion 214 prevents a pressing portion of the piston portion 22 described later from falling off from the cylinder portion 21.

  The piston part 22 includes an insertion part 221, a pressing part 222, and an operation part 223. The insertion part 221, the pressing part 222, and the operation part 223 are formed of resin or the like. This formation may be an integral formation.

  The insertion portion 221 has a cylindrical shape and is slidably inserted into the reduced diameter portion 214 in the cylindrical portion 211. The pressing portion 222 is provided on the distal end side of the insertion portion 221, and the outer diameter thereof is larger than the outer diameter of the insertion portion 221 and smaller than the inner diameter of the cylindrical portion 211. The outer diameter portion of the insertion portion 221 is formed to be slidable with respect to the inner diameter portion of the cylindrical portion 211. The operation unit 223 is provided on the proximal side proximal end portion of the insertion portion 221, and the outer diameter thereof is larger than the outer diameter of the insertion portion 221.

[Discharge operation using capsule discharge device]
Next, a release operation for releasing the capsule endoscope 10 into the subject 2 using the capsule release device 20 will be described. 4A to 4C are diagrams schematically showing processing for releasing the capsule endoscope 10 into the subject 2 using the capsule releasing device 20.

  As shown in FIG. 4A, first, the operator inserts the capsule discharge device 20 into the anus 2a of the subject 2 in a state where the capsule endoscope 10 is loaded in the cylinder portion 21 together with the lubricant 23 in advance. The positioning unit 213 is brought into contact with the subject 2. In this case, the operator needs to insert the sphincter of the anus 2a of the subject 2 with a force that overcomes the sphincter, and grasps the cylindrical portion 211 so as not to accidentally release the capsule endoscope 10 into the subject 2. The positioning part 213 of the cylinder part 21 is pushed toward the subject 2 and inserted into the anus 2 a of the subject 2. As a result, the positioning unit 213 is finally pressed against and contacted with the body wall around the anus, and the position of the capsule discharge device 20 with respect to the subject 2 can be determined.

  Subsequently, the surgeon further presses the operation portion 223 of the piston portion 22 in the insertion direction of the subject 2, thereby bringing the pressing portion 222 of the piston portion 22 into contact with the capsule endoscope 10 and bringing them into contact with each other. By further pushing the piston portion 22 in the state, the capsule endoscope 10 is released from the distal end portion 212 of the cylinder portion 21 into the living body (FIG. 4B → FIG. 4C). Thereby, the capsule endoscope 10 is arranged at a desired position of the large intestine 2b of the subject 2. Furthermore, since the lubricant 23 is also released together with the capsule endoscope 10 by the movement of the piston portion 22, the capsule endoscope 10 can be smoothly inserted into the living body. Note that when the capsule discharge device 20 is inserted into the subject 2, the lubricant 23 may be applied to the surface of the cylinder portion 21. Thereby, the capsule discharge device 20 can be more easily inserted into the subject 2.

  According to the first embodiment of the present invention described above, since the positioning portion 213 is provided on the outer peripheral side of the cylinder portion 21, the capsule endoscope 10 can be easily placed at a desired position in the large intestine 2b of the subject 2. Can be easily inserted by operation.

  Furthermore, according to the first embodiment of the present invention, the distal end portion 212 holds the capsule endoscope 10 with the longitudinal direction of the capsule endoscope 10 aligned with the longitudinal direction of the cylindrical portion 211, and the imaging of the capsule endoscope 10. Since the side is held in the direction in which the subject 2 is inserted, insertion can be performed while viewing the image transmitted from the capsule endoscope 10 when the capsule endoscope 10 is inserted.

  Further, according to Embodiment 1 of the present invention, since the lubricant 23 is accommodated in the capsule discharge device 20, when the capsule endoscope 10 is inserted into the subject 2, it can be smoothly inserted. .

(Modification of Embodiment 1)
Next, a modification according to the first embodiment of the present invention will be described. The modification according to Embodiment 1 of the present invention is different only in the configuration of the cylinder portion of the capsule discharge device 20 according to Embodiment 1 described above. For this reason, below, the structure of the capsule discharge | release apparatus which concerns on the modification of this Embodiment 1 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge device 20 which concerns on Embodiment 1 mentioned above, and description is abbreviate | omitted.

  FIG. 5 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to a modification of the first embodiment of the present invention. A capsule discharge device 20a shown in FIG. 5 includes a cylinder part 21a that houses the capsule endoscope 10 and is inserted into the large intestine 2b of the subject 2 through the anus of the subject 2, a piston part 22, And a lubricant 23.

  The cylinder part 21 a includes a cylinder part 211, a tip part 212, a positioning part 213, a reduced diameter part 214, and a flange part 215. The flange portion 215 is provided to extend toward the outer peripheral side on the proximal end side of the cylindrical portion 211. The tube portion 211, the tip portion 212, the positioning portion 213, the reduced diameter portion 214, and the flange portion 215 are integrally formed.

  According to the modification of the first embodiment of the present invention described above, the operator can take a gripping position like a syringe by placing a finger between the flange portion 215 and the positioning portion 213. The operation of the piston portion 22 can be easily performed. As a result, the release operation of the capsule endoscope 10 can be easily performed with a simple operation.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. The capsule discharge device according to the second embodiment is different in configuration from the capsule discharge device 20 according to the first embodiment described above. For this reason, below, the structure of the capsule discharge | release apparatus which concerns on this Embodiment 2 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge device 20 which concerns on Embodiment 1 mentioned above, and description is abbreviate | omitted.

[Configuration of capsule discharge device]
FIG. 6 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Embodiment 2 of the present invention. The capsule discharge device 20b shown in FIG. 6 accommodates the capsule endoscope 10 therein and is inserted into the large intestine of the subject 2 through the anus of the subject 2, and the cylinder portion 21b. The piston part 22b inserted slidably and the lubricant 23 are provided.

  The cylinder part 21 b includes a cylinder part 211, a tip part 212, a positioning part 213, a reduced diameter part 214, and a claw part 216.

  The nail | claw part 216 is provided in the inner peripheral side of the cylinder part 211, and the internal diameter is smaller than the outer diameter of the press part 222b mentioned later. The claw portion 216 is formed using an elastically deformable member. The claw portion 216 is formed to be inclined so that the inner diameter gradually increases from the tip side. The claw portion 216 prevents the piston portion 22b from entering, and when pressed by the piston portion 22b, at least one of the pressing portion 222b or the claw portion 216 described later is elastically deformed. The claw portion 216 is provided on the entire inner circumference side of the cylindrical portion 211, but may be configured to be provided on a part of the inner circumferential side of the cylindrical portion 211.

  The piston portion 22b is slidably inserted into the cylindrical portion 211, and is provided at the distal end side of the insertion portion 221b, with an insertion portion 221b having a space 224 formed therein, and is larger than the outer diameter of the insertion portion 221b. A pressing portion 222b having an outer diameter smaller than the inner diameter of the cylindrical portion 211 and an operation portion 223 are provided. The space 224 is formed so as to penetrate the longitudinal direction of the insertion portion 221b. Further, the pressing portion 222 b is formed in a tapered shape so that the diameter gradually increases from the distal end toward the proximal end side, and the maximum outer diameter is larger than the minimum inner diameter of the claw portion 216. The lubricant 23 is filled on the tip side of the claw portion 216.

[Discharge operation using capsule discharge device]
Next, a release operation for releasing the capsule endoscope 10 into the subject 2 using the capsule release device 20b will be described. 7A to 7C are diagrams schematically showing processing for releasing the capsule endoscope 10 into the subject 2 using the capsule releasing device 20b.

  As shown in FIG. 7A, first, the operator inserts the capsule discharge device 20b into the anus 2a of the subject 2 in a state where the capsule endoscope 10 and the lubricant 23 are loaded in the cylinder portion 21b in advance. The positioning unit 213 is brought into contact with the subject 2. In this case, it is necessary for the operator to insert the sphincter of the anus 2a of the subject 2 with a force that overcomes the sphincter, and while grasping the positioning unit 213 so as not to accidentally release the capsule endoscope 10 into the subject 2. Insert into the anus 2a of the subject 2. Thereby, the position of the capsule discharge device 20b with respect to the subject 2 is determined.

  Subsequently, the surgeon pushes the operating portion 223 of the piston portion 22b strongly in the insertion direction of the subject 2 to get over the pressing portion 222b of the piston portion 22b over the claw portion 216 of the cylinder portion 21b (FIG. 7A). → FIG. 7B). At this time, the pressing portion 222b of the piston portion 22b is elastically deformed so as to shrink toward the center in the radial direction, thereby moving over the claw portion 216 and moving to the position on the tip end portion 212 side. That is, in order to get over the claw portion 216, it is necessary to press the operation portion 223 by applying a large force, so that the piston portion 22b may be accidentally pressed during transport of the capsule discharge device 20b. In addition, the capsule endoscope 10 can be prevented from being released at an undesired location.

  After that, the surgeon further presses the operation portion 223 of the piston portion 22b in the insertion direction of the subject 2, thereby bringing the pressing portion 222b of the piston portion 22b into contact with the capsule endoscope 10 and in contact with the capsule endoscope 10. By further pushing in the piston portion 22b, the capsule endoscope 10 is released from the distal end portion 212 of the cylinder portion 21b into the living body (FIG. 7B → FIG. 7C). Thereby, the capsule endoscope 10 is arranged at a desired position of the large intestine 2b of the subject 2.

  According to the second embodiment of the present invention described above, by providing the claw portion 216 on the inner peripheral side of the cylinder portion 21b, the capsule endoscope 10 is erroneously not desired when transporting the capsule discharge device 20b. It can be prevented from being released.

(Modification of Embodiment 2)
Next, a modification according to the second embodiment of the present invention will be described. In the modified example according to the second embodiment of the present invention, the support member that holds the capsule endoscope 10 in place of the lubricant 23 loaded in the capsule discharge device 20b according to the second embodiment described above is the cylinder portion 21b. To house. For this reason, below, the structure of the capsule discharge | release apparatus which concerns on the modification of this Embodiment 2 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge | release apparatus 20b which concerns on Embodiment 2 mentioned above, and description is abbreviate | omitted.

  FIG. 8 is a cross-sectional view illustrating a schematic configuration of a capsule discharge device according to a modification of the second embodiment of the present invention. 8 includes a cylinder portion 21b, a piston portion 22b, and a support member 24 that holds the capsule endoscope 10. The capsule discharge device 20c illustrated in FIG.

  The support member 24 maintains the position of the capsule endoscope 10 in the cylinder portion 21b. The support member 24 prevents the capsule endoscope 10 from dropping into the cylinder portion 21b even when an external force is applied from the digestive tract or the like when the capsule discharge device 20c is inserted into the subject 2. Thus, the capsule endoscope 10 is supported in the axial direction until the time of release. The support member 24 has a columnar shape, and a groove portion that supports the capsule endoscope 10 therein is provided on the distal end side. The support member 24 is formed using, for example, a sponge. Further, the support member 24 prevents damage caused by the capsule endoscope 10 coming into contact with the pressing portion 222b of the piston portion 22b. Further, the support member 24 is disposed inside the cylinder portion 21b in a state of being in contact with the claw portion 216.

[Capsule release operation using capsule release device]
Next, a release operation for releasing the capsule endoscope 10 into the subject 2 using the capsule release device 20c will be described. FIG. 9A and FIG. 9B are diagrams schematically showing processing for releasing the capsule endoscope 10 into the subject 2 using the capsule releasing device 20c.

  As shown in FIG. 9A, first, the operator inserts the capsule discharge device 20c into the anus 2a of the subject 2 in a state where the capsule endoscope 10 is loaded together with the support member 24 in the cylinder portion 21b in advance. The positioning unit 213 is brought into contact with the subject 2. In this case, the support member 24 supports the capsule endoscope 10 even when an external force is applied from the sphincter of the anus 2a of the subject 2. Thereby, it is possible to prevent the capsule endoscope 10 from falling into the cylinder portion 21b.

  Subsequently, the surgeon strongly pushes the operation portion 223 of the piston portion 22b in the insertion direction of the subject 2, thereby getting over the pressing portion 222b of the piston portion 22b with respect to the claw portion 216 of the cylinder portion 21b. The pressing part 222b of 22b is brought into contact with the support member 24, and the capsule part 10 is further released from the tip part 212 of the cylinder part 21b by further pushing the piston part 22b in the contacted state (FIG. 9A). → FIG. 9B). Thereby, the capsule endoscope 10 is arranged at a desired position of the large intestine 2b of the subject 2.

  According to the modification of the second embodiment of the present invention described above, by providing the support member 24 that maintains the position of the capsule endoscope 10 in the cylinder portion 21b, the capsule endoscope 10 is provided with the cylinder portion. It is possible to prevent falling into 21b.

  In the modification of the second embodiment of the present invention, the lubricant 23 may be loaded between the cylinder portion 21b and the capsule endoscope 10.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. The capsule discharge device according to the third embodiment is different in configuration from the capsule discharge device 20b according to the second embodiment described above. Therefore, the configuration of the capsule discharge device according to the third embodiment will be described below. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge | release apparatus 20b which concerns on Embodiment 2 mentioned above, and description is abbreviate | omitted.

[Configuration of capsule discharge device]
FIG. 10 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Embodiment 3 of the present invention. A capsule release device 20d shown in FIG. 10 includes a cylinder part 21d that accommodates the capsule endoscope 10 therein and is inserted into the large intestine of the subject 2 through the anus of the subject 2, and a piston part 22b. Prepare. In the capsule discharge device 20d, the lubricant 23 may be disposed in the cylinder portion 21d.

  The cylinder part 21 d includes a cylinder part 211, a tip part 212, a positioning part 213, a reduced diameter part 214, and a holding state release part 400.

  The holding state release unit 400 releases the state in which the distal end portion 212 holds the capsule endoscope 10 by an operation of inserting the insertion portion 221b. The holding state release unit 400 includes a claw portion 216 and a groove portion 217.

  The groove portion 217 is provided by forming a groove on the outer peripheral side of the tube portion 211 so as to go around the center of the tube portion 211. The thickness dimension of the cylinder part 211 in the groove part 217 is smaller than the thickness dimension of the other part of the cylinder part 211. The groove portion 217 is provided on the outer peripheral side of the cylindrical portion 211 corresponding to the portion where the claw portion 216 is provided.

[Discharge operation using capsule discharge device]
Next, a release operation for releasing the capsule endoscope 10 into the subject 2 using the capsule release device 20d will be described. FIG. 11A and FIG. 11B are diagrams schematically showing processing for releasing the capsule endoscope 10 into the subject 2 using the capsule discharge device 20d.

  As shown in FIG. 11A, first, the operator inserts the capsule discharge device 20d into the anus 2a of the subject 2 with the capsule endoscope 10 loaded in the cylinder portion 21d, and covers the positioning portion 213. Contact with the specimen 2. The capsule endoscope 10 is previously held by the distal end portion 212.

  Subsequently, the operator presses the pressing portion 222b of the piston portion 22b against the claw portion 216 of the cylinder portion 21d by strongly pressing the operation portion 223 of the piston portion 22b in the insertion direction of the subject 2. In this case, in the capsule discharge device 20d, the inclined surface of the pressing portion 222b of the piston portion 22b presses the inclined surface of the claw portion 216. As a result, a force that pushes the distal end portion 212 toward the outer edge side acts on the distal end portion 212 of the cylinder portion 21d, so that the distal end portion 212 spreads to the outer peripheral side with respect to the groove portion 217, and the capsule endoscope 10 is released. (FIG. 11A → FIG. 11B). As a result, the capsule endoscope 10 is placed at a desired position on the large intestine 2b of the subject 2.

  According to the third embodiment of the present invention described above, the capsule endoscope 10 can be easily inserted into the large intestine 2b of the subject 2 by a simple operation.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. The capsule discharge device according to the fourth embodiment is different in configuration from the capsule discharge devices according to the first to third embodiments described above. Specifically, the capsule discharge device according to the fourth embodiment has a shape that can be expanded and contracted. For this reason, below, the structure of the capsule discharge | release apparatus which concerns on this Embodiment 4 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge device 20 which concerns on Embodiment 1 mentioned above, and description is abbreviate | omitted.

  FIG. 12 is a cross-sectional view showing a schematic configuration of a capsule discharge device according to Embodiment 4 of the present invention, and is a cross-sectional view showing a contracted state. FIG. 13: is sectional drawing which shows schematic structure of the capsule discharge | release apparatus which concerns on Embodiment 4 of this invention, and is sectional drawing which shows an expansion | extension state.

  12 and 13 includes a cylinder part 21e that accommodates the capsule endoscope 10 therein and is inserted into the large intestine of the subject 2 through the anus of the subject 2, and a cylinder part 21e. And a piston portion 22e slidably inserted.

  The cylinder portion 21e includes a first cylindrical member 30 having a cylindrical shape, and a second cylindrical member 31 that is slidably disposed inside the first cylindrical member 30 and has a cylindrical shape.

  The first cylindrical member 30 has a cylindrical first cylindrical portion 301 and an inner diameter that gradually decreases from the distal end side of the first cylindrical portion 301 (D11 → D10), and the thickness of the first cylindrical member 30 And a distal end portion 302 that is smaller in outer diameter than the outer diameter of the capsule endoscope 10 and can be elastically deformed, and a proximal end side of the first cylindrical portion 301 from the inner peripheral side. And an annular reduced diameter portion 303 provided extending toward the center. The distal end 302 side of the reduced diameter portion 303 is an inclined surface.

  The second cylindrical member 31 includes a cylindrical second cylindrical portion 311, a first convex portion 312 and a second convex portion 313 provided to extend toward the outer circumference in the radial direction of the second cylindrical portion 311. And having. The second convex portion 313 gradually decreases in diameter toward the proximal end side of the second cylindrical member 31 and forms an inclined surface. The first convex portion 312 and the second convex portion 313 are engaged with the reduced diameter portion 303 of the first cylindrical member 30 to extend the second cylindrical member 31 from the first cylindrical member 30. It functions as a first stopper for maintaining.

  The piston portion 22e includes a first insertion member 40 having a cylindrical shape, and a second insertion member 41 having a cylindrical shape, which is slidably disposed inside the first insertion member 40.

  The first insertion member 40 includes a cylindrical first insertion member 401 that is slidably inserted into the second cylindrical portion 311, and an inner diameter of the first cylindrical portion 301 that is larger than the outer diameter of the first insertion member 401. A pressing portion 402 having a smaller outer diameter, and a third convex portion 403 provided on the inner peripheral side of the first insertion member 401 on the proximal end side and formed toward the center of the first insertion member 401. The third convex portion 403 is formed such that the diameter gradually decreases from the proximal end side to the distal end side of the first insertion member 40, and has an inclined surface.

  The second insertion member 41 includes a cylindrical second insertion portion 411, a fourth convex portion 412 that is larger than the outer diameter of the second insertion portion 411 and smaller than the inner diameter of the third convex portion 403, and a fifth convex portion 413. It has the operation part 223 provided in the base end side of the 2nd insertion part 411, and the through-hole 224b penetrated in the longitudinal direction of a 2nd insertion member. The 5th convex part 413 is formed so that a diameter may become small gradually toward the base end side of the 2nd insertion part 411, and has an inclined surface. The 4th convex part 412 and the 5th convex part 413 maintain the state which extended the 2nd insertion member 41 from the 1st insertion member 40 by fitting with the 3rd convex part 403 of the 1st insertion member 40. It functions as a second stopper portion for this purpose.

  In the capsule discharge device 20e configured as described above, first, the surgeon extends the second cylindrical member 31 from the first cylindrical member 30, whereby the first convex portion 312 and the second convex portion 313 are moved to the first. It fits in the reduced diameter part 303 of the cylindrical member 30. Thereafter, the capsule releasing device 20e is configured such that the operator extends the second insertion member 41 from the first insertion member 40, thereby changing the fourth protrusion 412 and the fifth protrusion 413 to the third protrusion of the first insertion member 40. 403 is fitted (see FIG. 12 → FIG. 13). After each fitting operation is completed, the capsule endoscope can be placed at a desired position of the large intestine of the subject by performing the same operation as in the above-described embodiments.

  According to the fourth embodiment of the present invention described above, the capsule discharge device 20e can be downsized.

  In the fourth embodiment of the present invention, the claw portion 216 of the second embodiment described above may be provided on the inner peripheral side of the second cylindrical member 31. Thereby, it is possible to prevent the capsule endoscope from being accidentally released at an undesired location when the capsule releasing device 20e is transported.

(Modification 1 of Embodiment 4)
Next, Modification 1 of Embodiment 4 of the present invention will be described. Modification 1 according to the fourth embodiment is different in the configuration of the cylinder portion 21e in the capsule discharge device 20e of the fourth embodiment described above. For this reason, below, the structure of the capsule discharge | release apparatus which concerns on the modification 1 of this Embodiment 4 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge device 20e which concerns on Embodiment 4 mentioned above, and description is abbreviate | omitted.

  FIG. 14: is sectional drawing which shows schematic structure of the capsule discharge device which concerns on the modification 1 of Embodiment 4 of this invention, and is sectional drawing which shows a contracted state. FIG. 15: is sectional drawing which shows schematic structure of the capsule discharge device which concerns on the modification 1 of Embodiment 4 of this invention, and is sectional drawing which shows an expansion | extension state.

  The cylinder part 21f of the capsule discharge device 20f shown in FIGS. 14 and 15 has a second cylindrical member 31a instead of the second cylindrical member 31 of the capsule discharge device 20e according to Embodiment 4 described above.

  The second cylindrical member 31 a includes a second cylindrical portion 311, a first convex portion 312, and a plurality of second convex portions 313. The plurality of second convex portions 313 are provided at predetermined equal intervals from the distal end side of the second cylindrical member 31a.

  In the capsule discharge device 20f configured as described above, first, the surgeon extends the second cylindrical member 31a from the first cylindrical member 30, whereby the first convex portion 312 and the second convex portion 313 are moved to the first. It fits in the reduced diameter part 303 of the cylindrical member 30. In this case, the surgeon changes the position of the second convex portion 313 to be fitted to the reduced diameter portion 303 of the first cylindrical member 30 according to the subject 2. Thereby, the length of the capsule discharge device 20f can be changed and extended according to the subject 2.

  According to the first modification of the fourth embodiment of the present invention described above, the insertion length of the capsule discharge device 20f can be changed according to the subject 2, and the size can be reduced during storage.

  Moreover, in the modification 1 of Embodiment 4 of this invention, you may provide the nail | claw part of Embodiment 2 mentioned above in the inner peripheral side of the 2nd cylindrical member 31a. As a result, it is possible to prevent the capsule endoscope from being accidentally released at an undesired location when the capsule discharge device is transported.

(Modification 2 of Embodiment 4)
Next, a second modification of the fourth embodiment of the present invention will be described. The second modification according to the fourth embodiment is different in the configuration of the capsule discharge device 20f of the first modification according to the fourth embodiment described above. For this reason, below, the structure of the capsule discharge | release apparatus which concerns on the modification 2 of this Embodiment 4 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure same as the capsule discharge | release apparatus 20f which concerns on the modification 1 of Embodiment 4 mentioned above, and description is abbreviate | omitted.

  FIG. 16: is sectional drawing which shows schematic structure of the capsule discharge | release apparatus of the modification 2 of Embodiment 4 of this invention, and is sectional drawing which shows a contracted state. FIG. 17: is sectional drawing which shows schematic structure of the capsule discharge | release apparatus which concerns on the modification 2 of Embodiment 4 of this invention, and is sectional drawing which shows an expansion | extension state.

  A capsule discharge device 20g shown in FIG. 16 has a first cylindrical member 30a instead of the first cylindrical member 30 of the capsule discharge device 20f according to Modification 1 of Embodiment 4 described above. The first cylindrical member 30a is provided with a plurality of holes 304 that communicate the inner peripheral side and the outer peripheral side at predetermined intervals. In addition, although the hole 304 is provided with two or more by the 1st cylindrical member 30a, only the front end side of the 1st cylindrical member 30a may be sufficient.

  In the capsule discharge device 20g configured as described above, when the piston portion 22e is inserted into the cylinder portion 21g, the lubricant 23 stored in the cylinder portion 21g is discharged to the outside through the hole 304. As a result, the capsule discharge device 20g can be inserted into the subject 2 more smoothly than when the lubricant 23 is discharged from the distal end portion 302.

  According to the second modification of the fourth embodiment of the present invention described above, the lubricant 23 is introduced from the hole 304 into the subject 2 by providing the first cylindrical member 30a with the plurality of holes 304 connected to the outside. Since the discharge is performed, the capsule discharge device 20g can be inserted into the subject 2 more smoothly than when the lubricant 23 is discharged from the distal end portion 302.

(Other embodiments)
In the first to fourth embodiments of the present invention described above, a cushioning material such as sponge or rubber may be further provided on the pressing portion of the piston portion. Thereby, it is possible to prevent the capsule endoscope from being damaged by the sliding operation of the piston portion.

  Moreover, in Embodiment 1-4 of this invention, you may provide a non-slip structure, for example, a groove | channel in the outer periphery of the operation part of a piston part, or may form in a taper shape. Thereby, since the operator can hold | grip a piston part reliably, insertion operation can be performed easily.

  Further, the present invention is not limited to the above-described embodiment as it is, and in the implementation stage, the constituent elements can be modified and embodied without departing from the gist of the invention. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some constituent elements may be deleted from all the constituent elements described in the above-described embodiments without departing from the gist of the present invention. Furthermore, the constituent elements described in the embodiments may be combined as appropriate.

  In addition, a term described together with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term anywhere in the specification or the drawings. Thus, various modifications and applications are possible without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Capsule type | mold endoscope system 2 Subject 2a Anus 2b Large intestine 3 Bed 10 Capsule type | mold endoscope 11 Position detection apparatus 12 Magnetic field generator 13 Signal processing apparatus 14 Signal generator 15 Receiving apparatus 15a Receiving antenna 16 Operation input apparatus 17 Control Device 18 Display device 20, 20a to 20g Capsule discharge device 21, 21a, 21b, 21d, 21e, 21f, 21g Cylinder part 22, 22b, 22e Piston part 23 Lubricant 24 Support member 30, 30a First cylindrical member 31, 31a 2nd cylindrical member 40 1st insertion member 41 2nd insertion member 101 Capsule type housing 102 Imaging part 211 Tube part 212,302 Tip part 213 Positioning part 214,303 Reduced diameter part 215 Flange part 216 Claw part 217 Groove part 221 , 221b Insertion part 222, 222b, 40 Press part 223 Operation part 301 1st cylinder part 304 Hole 311 2nd cylinder part 312 1st convex part 313 2nd convex part 400 Holding state cancellation | release part 401 1st insertion member 403 3rd convex part 411 2nd insertion part 412 4th Convex part 413 Fifth convex part

Claims (14)

A cylindrical tube portion having an inner diameter larger than the outer diameter of the capsule endoscope that can be introduced into the subject, and an inner diameter of the end portion provided on the distal end side of the tube portion and not in contact with the tube portion. A distal end portion having a tubular shape that is equal to or smaller than an outer diameter of the capsule endoscope, and a proximal end side outer peripheral side of the cylindrical portion at a predetermined distance from the distal end portion, and the capsule mold with respect to the subject A positioning part for determining a position to insert an endoscope, and a cylinder part having
An insertion portion that is slidably inserted into the cylindrical portion, a pressing portion that presses the capsule endoscope toward the distal end side, and a proximal end side of the insertion portion that is gripped by an operator And an operating portion for pushing the pressing portion toward the distal end side, and a piston portion,
Equipped with a,
The capsule discharge device according to claim 1, wherein the pressing portion has an outer diameter larger than an outer diameter of the insertion portion and smaller than an inner diameter of the cylindrical portion . The tip has an inner diameter that gradually decreases from the tip side of the tube portion, and the thickness in the thickness direction gradually decreases from the tip side of the tube portion,
The capsule operating device according to claim 1, wherein the operation unit is larger than an outer diameter of the insertion unit.   2. The capsule discharge device according to claim 1, wherein at least a part of the positioning portion extends toward an outer peripheral side of the cylindrical portion on a proximal end side of the cylindrical portion. The capsule endoscope has an imaging unit that images the subject,
The distal end portion holds the longitudinal direction of the capsule endoscope in alignment with the longitudinal direction of the cylindrical portion, and holds the imaging direction of the imaging portion toward the insertion direction of the subject. Capsule release device according to claim 1, characterized in that   The capsule discharge device according to claim 1, further comprising a lubricant disposed between the tip portion and the capsule endoscope. It further comprises a reduced diameter portion provided on the inner peripheral side of the cylindrical portion,
Before Kichijimi diameter has an inner diameter smaller than the outer diameter of the pressing portion, the capsule release device according to claim 1, characterized in that larger than the outer diameter of the insertion portion. A claw portion that is provided on the inner peripheral side of the cylindrical portion, is formed so as to be smaller than the outer diameter of the pressing portion, and is gradually inclined from the distal end side of the cylindrical portion, and is elastically deformable. ,
The claw portion contacts the pressing portion, and at least one of the pressing portion or the claw portion is elastically deformed to pass the pressing portion,
The capsule discharge device according to claim 1, wherein the pressing portion presses the capsule endoscope after passing through the claw portion.   The capsule discharge device according to claim 7, further comprising a support member that is disposed between the claw portion and the distal end portion and supports the capsule endoscope in an axial direction.   The capsule discharge device according to claim 1, further comprising a holding state release unit that releases a state in which the distal end portion holds the capsule endoscope by an operation of inserting the insertion unit. . The holding state releasing unit is
A claw portion that is provided on the inner peripheral side of the cylindrical portion, is formed so as to be smaller than the outer diameter of the distal end portion and inclined so that the inner diameter gradually increases from the distal end side of the cylindrical portion;
A groove portion provided on the outer peripheral side of the cylindrical portion corresponding to a portion provided with the claw portion;
The capsule discharge device according to claim 9, comprising: The cylindrical portion is
A first tubular member having a tubular shape;
A second tubular member housed inside the first tubular member and slidable relative to the first tubular member;
A first stopper for maintaining a state in which the second tubular member is extended from the first tubular member;
Have
The insertion part is
A first insertion member having a cylindrical shape;
A second insertion member housed inside the first insertion member and slidable relative to the first insertion member;
A second stopper portion for maintaining a state in which the second insertion member is extended from the first insertion member;
The capsule discharge device according to claim 1, comprising:   The capsule discharge device according to claim 11, wherein a plurality of the first stopper portions are provided at a predetermined interval on an outer peripheral side of the second cylindrical member.   13. The capsule discharge device according to claim 12, wherein the first cylindrical member is provided with a plurality of holes communicating the inner peripheral side and the outer peripheral side. A capsule release device according to claim 1;
The capsule endoscope;
A capsule release system comprising:

Images