JP5893803B1 - Endoscope - Google Patents

Abstract

An insertion portion, a treatment instrument insertion conduit 50 provided with an insertion passage 51 through which a treatment instrument is inserted into the tubular partition wall 52, and a part of the partition wall 52 of the treatment instrument insertion conduit 50 In the radial direction of the treatment instrument insertion conduit 50, which is configured to have a predetermined length in the circumferential direction C of the partition wall 52 and is softer than the other partition wall 52 and pressed from the outside of the partition wall 52. K is provided with a deformable portion 58 that can be deformed toward the insertion passage 51 and can be partially reduced in diameter.

Description

  The present invention relates to an endoscope in which a treatment instrument insertion portion is provided in an insertion portion to be inserted into a subject.

 In recent years, endoscopes are widely used in the medical field and the industrial field. An endoscope used in the medical field can observe an organ in a body cavity by inserting an elongated insertion portion into a body cavity as a subject.

 An endoscope used in the medical field is a body cavity using a treatment tool inserted into an insertion passage in a tubular partition wall in a treatment instrument insertion conduit that is a treatment instrument insertion portion provided in an insertion portion as necessary. Various treatments can be performed inside. In addition, the structure by which the treatment tool penetration conduit was provided in the insertion part is disclosed by Japan Unexamined-Japanese-Patent No. 2002-272673.

  By the way, in the state where the treatment instrument is inserted into the insertion path of the treatment instrument insertion conduit, when the diameter of the treatment instrument is too small than the diameter of the insertion passage, the partition wall and the treatment of the treatment instrument insertion conduit in the radial direction of the insertion portion A large gap will occur between the tool and the tool.

 Therefore, during the treatment in the body cavity using the treatment tool, the treatment tool is likely to move back and forth in the radial direction and the extending direction of the insertion portion in the insertion path.

 As a result, there is a problem in that the position of the treatment tool is displaced, and it is difficult to transmit the operation force to the treatment tool, and the operability of the treatment tool is lowered.

 In addition, the above is usually the case where the treatment instrument insertion conduit also serves as the suction conduit, but in order to improve the suction performance, when the diameter of the insertion passage is made larger than usual, for example, the diameter of the insertion passage. Is usually a problem when the thickness is increased to 3.7 mm and 4.2 mm in the case of 2.8 mm.

  The present invention has been made in view of the above problems, and when a treatment tool is inserted through the insertion passage of the treatment instrument insertion conduit, a large gap is generated between the partition wall of the treatment instrument insertion conduit and the treatment instrument. Even so, an object is to provide an endoscope having a configuration capable of improving the operability of the treatment instrument.

An endoscope according to one aspect of the present invention includes an insertion portion that is inserted into a subject, and a treatment instrument insertion that is provided in the insertion portion and that includes an insertion passage through which a treatment instrument is inserted into a tubular partition wall. And a part of the partition wall of the treatment instrument insertion portion that is configured to have a predetermined length in the circumferential direction of the partition wall and is more flexible than the other partition part and is pressed from outside the partition wall In this way, the treatment instrument insertion portion can be deformed to the insertion passage side in the radial direction, and the insertion passage can be partially reduced in diameter. A pressing portion that is provided outside the radial direction and presses the deforming portion toward the insertion path in the radial direction; and a driving mechanism for the pressing portion, and the pressing portion is rotated. It is a free plate-shaped member, and the drive mechanism is the insertion portion. Tip together are inserted are constructed from pulling member connected to the plate-like member, the plate member with the traction of the traction member by rotating in one direction, for pressing the deformable portion .
In addition, an endoscope according to another aspect of the present invention includes an insertion portion that is inserted into a subject, and an insertion passage that is provided in the insertion portion and through which a treatment instrument is inserted into a tubular partition wall. A treatment instrument insertion portion, and a part of the partition wall of the treatment instrument insertion portion that is configured to have a predetermined length in the circumferential direction of the partition wall, and is more flexible than the other partition wall portion and the partition wall By being pressed from the outside, the treatment instrument insertion portion can be deformed to the insertion passage side in the radial direction, and the insertion passage can be partially reduced in diameter, and the deformation in the insertion portion. A pressing portion that is provided on the outer side in the radial direction than the portion, presses the deforming portion toward the insertion path in the radial direction, and a driving mechanism for the pressing portion. Coiled part that deforms when voltage is applied The drive mechanism is composed of an electrically conductive portion that is inserted into the insertion portion and has a distal end electrically connected to the coil-shaped member, and from the power source via the electrically conductive portion, the coil shape When a voltage is applied to the member, the coiled member is deformed and presses the deformed portion.

The figure which shows the external appearance of the endoscope of 1st Embodiment. 1 is a partial cross-sectional view of the distal end side of the insertion portion of FIG. 1 along the line II-II in FIG. FIG. 2 is a perspective view of the tubular unit of FIG. Sectional drawing of the front-end | tip part of FIG. 2 which follows the IV-IV line in FIG. The fragmentary perspective view which shows the plate-shaped member of FIG. 2 with a traction member Partial sectional view of the distal end side of the insertion portion of the endoscope in the second embodiment Partial sectional view of the distal end side of the insertion portion of the endoscope according to the third embodiment Sectional drawing which expands and shows the site | part enclosed by the VIII line in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. The drawings are schematic, and it should be noted that the relationship between the thickness and width of each member, the ratio of the thickness of each member, and the like are different from the actual ones. Of course, the part from which the relationship and ratio of a mutual dimension differ is contained.

(First embodiment)
FIG. 1 is a diagram illustrating an appearance of an endoscope according to the present embodiment.
As shown in FIG. 1, the endoscope 1 is connected to an insertion portion 2 to be inserted into a subject and a proximal end in the extending direction E of the insertion portion 2 (hereinafter simply referred to as a proximal end). And an operation unit 3.

 Further, the endoscope 1 includes a universal cord 8 extending from the operation unit 3 and a connector 9 provided at an extended end of the universal cord 8. Note that the endoscope 1 is electrically connected to an external device such as a control device or a lighting device via the connector 9.

 The insertion portion 2 includes a flexible tube portion 13 that is long along the extending direction E, and a curved portion 12 that is located in front of the flexible tube portion 13 in the extending direction E (hereinafter simply referred to as the front). And a distal end portion 11 positioned in front of the curved portion 12.

 An imaging unit 30 (see FIG. 2), which will be described later, that images the inside of the subject, an illumination unit (not shown) that supplies illumination light to the subject, and the like are provided in the distal end portion 11.

 The bending portion 12 can be bent in four directions, for example, up, down, left, and right, by turning knobs 4 and 6 for bending operation provided in the operation portion 3.

 The operation part 3 is provided with a turning knob 4 for up / down bending operation for bending the bending part 12 in the up / down direction and a turning knob 6 for left / right bending operation for bending the bending part 12 in the left / right direction.

 The operation unit 3 is provided with a fixing lever 5 that fixes the rotation position of the rotation knob 4 and a fixing knob 7 that fixes the rotation position of the rotation knob 6.

 Further, the operating portion 3 is provided with a turning lever 10 for turning a plate-like member 62 (see FIG. 2), which will be described later, provided in the distal end portion 11.

 Further, as shown by a dotted line in FIG. 1, in the endoscope 1, a treatment instrument insertion portion that is a treatment instrument insertion portion that also serves as a suction conduit is inserted in the insertion portion 2, the operation portion 3, the universal cord 8, and the connector 9. A conduit 50 is provided.

 As shown in FIG. 2 to be described later, the treatment instrument insertion conduit 50 includes a tubular partition wall 52 and an insertion passage 51 formed in the partition wall 52 and through which the treatment instrument 70 (see FIG. 4) is inserted. Configured.

 In the treatment instrument insertion conduit 50, one end of the insertion passage 51 is opened as an opening 51k in a distal end surface 2s provided in the distal end portion 11 of the insertion portion 2 as shown in FIG. The connector 9 communicates with a suction cap 9k. A suction device (not shown) is connected to the suction base 9k.

 Further, the treatment instrument insertion conduit 50 is branched in the operation section 3, and the end of the branched treatment instrument insertion conduit 50 communicates with a treatment instrument insertion port 3 i provided in the operation section 3. .

 Next, the structure in the front-end | tip part 11 is shown using FIGS. In particular, the configuration of the distal end side in the extending direction E of the treatment instrument insertion conduit 50 (hereinafter simply referred to as the distal end side) is shown.

 2 is a partial cross-sectional view of the insertion portion of FIG. 1 along the line II-II in FIG. 1, FIG. 3 is a perspective view of the tubular unit in FIG. 2, and FIG. FIG. 5 is a partial perspective view showing the plate-like member of FIG. 2 together with the traction member, along the IV line.

 As shown in FIG. 2, the distal end portion 11 includes a substantially cylindrical distal end hard member 20 inside. The distal end side of the curved rubber 69 constituting the outer periphery of the bending portion 12 is fixed to the proximal end side in the extending direction E of the outer peripheral surface 20g of the distal end rigid member 20 (hereinafter simply referred to as the proximal end side).

 Further, the distal end cover 21 is covered on the distal end side and the distal end surface 20 s of the outer peripheral surface 20 g of the distal end rigid member 20.

 Note that the distal end cover 21 has an objective lens (not shown), an illumination lens (not shown), and a treatment instrument insertion conduit that forms an imaging unit 30 (described later) exposed on the distal end surface 20 s of the distal end surface 20 s of the distal end hard member 20. The distal end surface 20s is covered except for the openings 51k of the 50 insertion passages 51 and the openings of various pipes (not shown).

 A through hole 20a that penetrates the distal hard member 20 along the extending direction E is formed in the distal hard member 20, and the distal end of the imaging unit 30 that is an imaging unit that images the inside of the subject is formed in the through hole 20a. The side is fixed. Since the detailed configuration of the imaging unit 30 is well known, the description thereof is omitted.

 In addition to the through hole 20a, the distal end hard member 20 is formed with a plurality of through holes penetrating the distal end hard member 20 in the extending direction E. Each through hole has a distal end of an illumination unit (not shown). The side and the tip side of various pipes are fixed.

 As an example, the distal end hard member 20 is formed with a through hole 20b penetrating the distal end hard member 20 along the extending direction E, and the distal end side of the treatment instrument insertion conduit 50 is fixed to the through hole 20b. Yes.

 Specifically, on the base end side in the extending direction E of the through-hole 20b (hereinafter simply referred to as the base end side), the extending direction of the suction cap 54 having the insertion passage 51 therein and constituting the partition wall 52 is provided. The front half of E is fitted.

 In addition, on the outer periphery of the rear half part of the extending direction E of the suction cap 54, the tip of the suction tube 55 which has the insertion path 51 and constitutes the partition wall 52 is fixed.

 In addition, a tubular unit 53 having an insertion passage 51 therein and constituting a partition wall 52 is fixed to the distal end side of the through hole 20b.

 As shown in FIG. 3, the tubular unit 53 is composed of a cylindrical member having an outward flange 53f at the tip, and is attached to and detached from the through hole 20b from the outside of the insertion portion 2 through the opening 51k of the insertion passage 51. It is free.

 Specifically, by removing the tip cover 21 from the tip surface 20s of the tip hard member 20, it is detachable from the through hole 20b through the opening 51k.

 Further, as shown in FIGS. 3 and 4, the tubular unit 53 is provided with a deformed portion 58 configured to have a predetermined length in the circumferential direction C of the partition wall 52.

 The deformable portion 58 is made of a material that is more flexible than other portions of the tubular unit 53, for example, a polymer material.

 The deformation portion 58 is deformable to the insertion passage 51 side in the radial direction K by being pressed from the outside in the radial direction K of the tubular unit 53. As shown in FIG. 4, the deformed portion 58 is configured so as to be able to be reduced in diameter so as to partially reduce the diameter of the insertion passage 51 from the diameter K1 to the diameter K2 (K2 <K1).

 The deforming portion 58 holds the treatment instrument 70 inserted through the insertion passage 51 by reducing or reducing the gap P between the outer periphery of the treatment instrument 70 and the inner periphery of the deformation section 58 after the deformation to the diameter K2. It has a function. As a result, the operability of the treatment instrument 70 is improved.

 The predetermined length of the deformable portion 58 in the circumferential direction C is defined by the diameter K3 of the treatment instrument 70. That is, it is defined by the size of the gap P when the treatment instrument 70 is inserted into the insertion passage 51.

 For example, the predetermined length of the deformable portion 58 in the circumferential direction C is 3, 7 mm, 4, 2 mm, which is the large diameter K1 of the insertion passage 51 as described above, and the diameter K3 of the treatment instrument 70 is approximately 2. In the case of .8 mm, as indicated by the dotted line in FIG.

 Further, as shown in FIG. 4, the deformable portion 58 is located opposite to the imaging unit 30 in the radial direction K, and with the pressing, the imaging unit 30 side, specifically, the visual field center side of the imaging unit 30 It is configured to be deformed.

 This is because, after the deformation portion 58 is deformed, the distal end of the treatment instrument 70 that protrudes forward from the opening 51k when the treatment instrument 70 inserted through the insertion passage 51 is moved toward the imaging unit 30 in the radial direction K. This is because the side easily enters the field of view of the objective lens of the imaging unit 30. In other words, even if the forward protrusion amount from the opening 51k in the treatment instrument 70 is small, the treatment tool 70 falls within the field of view of the objective lens.

 Further, as shown in FIG. 2, when the tubular unit 53 is fixed to the through-hole 20 b, the deforming portion 58 has a position facing the opening 51 k, specifically, an outward flange of the tubular unit 53 in the extending direction E. It is configured on the 53f side.

 This is because, when the deformable portion 58 is located near the opening 51k, the deformable portion 58 holds the treatment instrument 70 near the opening 51k when the deformable portion 58 is deformed to the diameter K2 as shown by the dotted line in FIG. it can. For this reason, it is because the retainability by the deformation | transformation part 58 of the treatment tool 70 which protrudes ahead rather than the opening 51k improves. In other words, this is because the displacement of the treatment instrument 70 can be prevented.

 As shown in FIG. 2, in the distal end hard member 20, a space H is formed between the distal end side of the through hole 20 b and the outer peripheral surface 20 g of the distal end hard member 20.

 Further, as shown in FIGS. 2, 4, and 5, the space H is located on the outer side in the radial direction K with respect to the deformable portion 58, and the deformable portion 58 is more specifically arranged on the insertion passage 51 side in the radial direction K. Is provided with a detachable plate-like member 62 which is a pressing portion for pressing toward the imaging unit 30 side.

 As shown in FIG. 5, the plate-like member 62 is formed in a semicircular shape, and as shown in FIG. 4, each end in the longitudinal direction is pivotally supported by the tip hard member 20 by a pin 64. Therefore, it is configured to be rotatable. Therefore, by removing the pin 64 and removing the tip cover 21, the plate-like member 62 can be attached to and detached from the tip hard member 20.

 As shown in FIG. 5, the plate-like member 62 is connected to the leading end of a pulling member 63 that is a drive mechanism inserted into the insertion portion 2 and the operation portion 3.

 In addition, as shown in FIG. 5, the pulling member 63 is comprised from the wire-shaped member, for example. Further, the base end of the pulling member 63 is fixed to the turning lever 10 provided in the operation unit 3.

 Therefore, when the pulling member 63 is pulled rearward in the extending direction E (hereinafter simply referred to as the rear) with the rotation of the rotating lever 10 in one direction, the plate-like member 62 causes the two pins 64 to move. It rotates in one direction as a pivot axis.

 As a result, the plate-like member 62 partially reduces the diameter of the insertion path 51 from the diameter K1 to the diameter K2 by pressing the deformable portion 58 and deforming the deformable portion 58 with rotation in one direction. Let the diameter.

 When the deformation amount of the deformable portion 58 using the plate-like member 62 is too large, the deformable portion 58 comes into close contact with the outer peripheral surface of the treatment instrument 70, and further presses the treatment instrument 70 against the inner peripheral surface 53 n of the tubular unit 53. Therefore, it becomes difficult for the treatment instrument 70 to move back and forth in the extending direction E.

 However, the treatment instrument 70 may be moved back and forth in the extending direction E during the treatment, and in this case, it becomes difficult to perform the operation of moving the treatment instrument 70.

 In consideration of this, in the present embodiment, as shown in FIG. 3, the tubular unit 53 is provided with a deformation amount defining mechanism 59 that defines the deformation amount of the deformation portion 58.

 Specifically, in the present embodiment, the deformation amount defining mechanism 59 is configured at the boundary between the deformation portion 58 and the other part of the tubular unit 53.

 The plate-like member 62 deforms the deformable portion 58 after rotating in one direction. However, when a part of the plate-like member 62 hits the deformation amount defining mechanism 59, the deformable portion 58 can be further deformed. become unable. That is, the deformation amount defining mechanism 59 can prevent the deformation portion 58 from being deformed by a predetermined amount or more.

 For example, when the diameter K3 of the treatment instrument 70 is 2, 8 mm, for example, the deformation amount defining mechanism 59 is set so that the diameter K2 after deformation by the plate-like member 62 of the deformation portion 58 does not become 2, 8 mm or less. The amount of deformation of the deformation portion 58 is defined.

 That is, according to the position where the deformation amount defining mechanism 59 is provided with respect to the tubular unit 53, in other words, depending on the contact position of the plate-like member 62 with respect to the deformation amount defining mechanism 59, the deformation amount of the deformation portion 58. Is prescribed.

 According to such a configuration, even if the diameter K1 of the insertion passage 51 is larger than, for example, 2, 8 mm, a part of the insertion passage 51 after the deformation portion 58 is deformed by the deformation amount defining mechanism 59. The diameter K2 is approximately 2, 8 mm.

 Therefore, the mobility of the treatment instrument 70 in the front-rear direction in the extending direction E is the same as that when the treatment instrument 70 is inserted through the insertion path 51 having a diameter K1 of 2 or 8 mm, and the front from the opening 51k. Since the amount of protrusion of the treatment tool 70 is the same, the operator can operate the treatment tool 70 without feeling uncomfortable.

 The deformation amount defining mechanism 59 is a member that can be abutted by the plate-like member 62 after the plate-like member 62 is rotated in one direction. It may be a separate member.

 Further, the deformation amount defining mechanism 59 may be configured by a member that regulates the pulling amount of the pulling member 63 on the operation unit 3 side.

 In addition, as described above, the tubular unit 53 is detachable to the outside of the insertion portion 2 through the opening 51k. Therefore, even if the deformation portion 58 is damaged, only the deformation portion 58 or the deformation portion 58 is obtained. The entire tubular unit 53 having the structure can be easily replaced.

 As shown in FIGS. 2 and 4, the space H including the tubular unit 53, the distal end hard member 20, and the cover member 61 is watertight.

 This prevents the liquid from entering the space H during the cleaning / disinfecting process of the endoscope 1, so that the cleaning / disinfecting of the distal end side of the insertion portion 2 is improved.

 As described above, in the present embodiment, the tubular unit 53 constituting the partition wall 52 on the distal end side of the treatment instrument insertion conduit 50 is pressed by the plate-like member 62 and deformed toward the insertion passage 51 in the radial direction K. Thus, it has been shown that the deformed portion 58 for partially reducing the diameter of the insertion passage 51 from the diameter K1 to the diameter K2 is provided.

 Here, as shown in FIG. 4, the diameter K <b> 1 of the insertion passage 51 of the treatment instrument insertion conduit 50 is larger than the diameter K <b> 3 of the treatment instrument 70 inserted through the insertion passage 51. When there is a large gap P between them, the treatment instrument 70 cannot be held by the treatment instrument insertion conduit 50, and the operability of the treatment instrument 70 may deteriorate as described above.

 However, if the configuration of the present embodiment is used, the deformable portion 58 is deformed by the plate-like member 62, and the diameter of the insertion path 51 is partially reduced from the diameter K1 to the diameter K2 substantially equal to the diameter K3 of the treatment instrument 70. Since the diameter can be increased, the treatment tool 70 can be reliably held by the deformable portion 58. Therefore, the operability of the treatment tool 70 can be improved.

 Further, since the deforming portion 58 presses the treatment instrument 70 toward the imaging unit 30, the treatment instrument 70 does not disappear from the observation image obtained by the imaging unit 30 with the pressing, and the treatment instrument 70 is not observed. It is not necessary to readjust the position of the treatment instrument 70 so as to be displayed on the screen. Therefore, the treatment time in the subject using the treatment tool 70 can be shortened.

 Further, since the deformable portion 58 is provided in the tubular unit 53 that is detachable through the opening 51k with respect to the through hole 20b, the deformable portion 58 can be easily repaired or replaced simply by removing the tip cover 21. It can be carried out.

 In the insertion passage 51, when the deformed portion 58 is not deformed, the diameter K1 of the insertion passage 51 is constant in the extending direction E, and there is no portion protruding from the inner peripheral surface 53n of the tubular unit 53 to the insertion passage 51. . Therefore, when the insertion passage 51 is cleaned and disinfected, the insertion passage 51 can be easily and surely cleaned and disinfected even by rubbing using a brush or the like.

 From the above, even when a large gap P is generated between the partition wall 52 of the treatment instrument insertion conduit 50 and the treatment instrument 70 when the treatment instrument 70 is inserted into the insertion passage 51 of the treatment instrument insertion conduit 50, the treatment instrument 70 is treated. The endoscope 1 having a configuration that can improve the operability of the tool 70 can be provided.

(Second Embodiment)
FIG. 6 is a partial cross-sectional view of the distal end side of the insertion portion of the endoscope according to the present embodiment.

 Compared with the endoscope of the first embodiment shown in FIGS. 1 to 5 described above, the configuration of the endoscope of the second embodiment is configured such that the pressing portion is formed of a coiled member, and the driving mechanism. Is different from that of the electric conduction part. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

 As shown in FIG. 6, in this Embodiment, the press part provided in the space H is comprised from the coil-shaped member 162 which deform | transforms when a voltage is applied. In addition, as the coil-shaped member 162, a metal alloy is mentioned, for example.

 The coil-shaped member 162 is also detachable with respect to the space H by removing the tip cover 21 from the tip hard member 20.

 The drive mechanism is an electrical conduction portion 163 inserted into the insertion portion 2 and the operation portion 3, and the distal end of the electrical conduction portion 163 penetrates the distal end hard member 20 along the extending direction E. The coil-shaped member 162 is electrically connected through a through hole 20 c communicating with the space H. In addition, as the electrical conduction portion 163, a conductive wire can be used.

 In such a configuration, when an operation input is performed by the operator from the instruction switch provided in the operation unit 3, a voltage is applied to the coiled member 162 from an external power source (not shown) via the electrical conduction unit 163. .

 As a result, the coil-shaped member 162 is deformed, and the deformed portion 58 is pressed in the same manner as the plate-shaped member 62 of the first embodiment. As a result, the diameter of the insertion passage 51 is partially reduced from the diameter K1 to the diameter K2.

 In the present embodiment, examples of the deformation amount regulating mechanism that regulates the deformation amount of the deforming portion 58 include a voltage adjusting member (not shown) that adjusts the amount of voltage supplied to the coiled member 162.

 That is, by adjusting the amount of voltage supplied to the coiled member 162, the amount of deformation of the coiled member 162 can be varied, so that the amount of deformation of the deformable portion 58 can be adjusted. Other configurations are the same as those in the first embodiment described above.

 Even in such a configuration, the same effect as in the first embodiment described above can be obtained, and the arrangement space of the plate-like member 62 is not required in the space H, and the coil-like member 162 that is linear is provided. Therefore, the diameter of the distal end portion 11 can be reduced as compared with the first embodiment described above.

(Third embodiment)
FIG. 7 is a partial cross-sectional view of the distal end side of the insertion portion of the endoscope according to the present embodiment, and FIG. 8 is an enlarged cross-sectional view showing a portion surrounded by line VIII in FIG.

 The configuration of the endoscope according to the third embodiment is the same as that of the endoscope according to the first embodiment shown in FIGS. 1 to 5 and the endoscope according to the second embodiment shown in FIG. The difference is that the deformed portion is formed of a balloon. Therefore, the same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

 As shown in FIGS. 7 and 8, in the present embodiment, the deformable portion 58 is formed of a balloon.

 As shown in FIG. 8, the distal end hard member 20 is formed with a through hole 20d penetrating along the extending direction E and communicating with the space H. The distal end side of the air base 83 is formed in the through hole 20d. It is fixed. An air supply tube 88 that is a pressurizing tube is connected to the base end of the air base 83.

 In such a configuration, the deforming portion 58 is supplied with a fluid, for example, air A, from the external fluid supply device (not shown) to the space H via the air supply tube 88 and the air base 83, thereby 1. Like the second embodiment, it is pressed and deformed. As a result, the diameter of the insertion passage 51 is reduced from the diameter K1 to the diameter K2.

 The supply of air A to the space H is performed by an operation input from an instruction switch provided in the operation unit 3.

 In the present embodiment, as the deformation amount defining mechanism that defines the deformation amount of the deformation portion 58, an air adjustment member (not shown) that adjusts the supply amount of the air A to the space H can be cited. That is, by adjusting the supply amount of the air A to the space H, the deformation amount of the deformation portion 58 can be adjusted.

 Other configurations are the same as those of the first and second embodiments described above. Note that what is supplied to the space H is not limited to the air A but may be liquid. That is, the deforming portion 58 may be deformed by supplying the liquid to the space H.

 Even in such a configuration, the same effects as those of the first embodiment described above can be obtained, and the pressing portion is not required as in the first and second embodiments described above. Reduction can be achieved and the diameter of the distal end portion 11 can be further reduced.

 In the first to third embodiments described above, it has been shown that the deformable portion 58 is provided in the tubular unit 53 that is detachable from the through hole 20b.

 Not only this but the deformation | transformation part 58 may be provided in a part of partition on the front end side of the treatment instrument penetration conduit 50 fixed to the through-hole 20b. Further, the number of the deforming portions 58 is not limited to one, and a plurality of the deforming portions 58 may be provided in the partition wall 52 of the treatment instrument insertion conduit 50.

  In addition, the plate-like member 62 and the coil-like member 162 that are the pressing portions shown in the first and second embodiments described above are merely examples of the pressing portion, and the pressing portion is a member that can press the deformation portion 58, Any configuration can be used.

This application is filed on the basis of the priority claim of Japanese Patent Application No. 2014-083049 filed in Japan on April 14, 2014, and the above contents are the description, claims and drawings of the present application. Is quoted in

Claims (12)

An insertion part to be inserted into the subject;
A treatment instrument insertion portion provided in the insertion portion and configured with an insertion passage through which a treatment instrument is inserted into a tubular partition;
A part of the partition wall of the treatment instrument insertion portion is configured to have a predetermined length in the circumferential direction of the partition wall and is more flexible than the other partition wall part and is pressed from outside the partition wall. The deformable portion is deformable to the insertion passage side in the radial direction of the treatment instrument insertion portion, and the diameter of the insertion passage can be partially reduced.
A pressing portion provided outside the deformation portion in the radial direction in the insertion portion, and pressing the deformation portion toward the insertion path in the radial direction;
A driving mechanism for the pressing portion;
It has
The pressing portion is a rotatable plate-like member, and the driving mechanism is configured by a pulling member that is inserted into the insertion portion and has a tip connected to the plate-like member. An endoscope , wherein the deformable portion is pressed by the plate member rotating in one direction as it is pulled . An imaging unit for imaging the inside of the subject is provided in the insertion unit, and the deformation unit is located opposite to the imaging unit in the radial direction, and is deformed to the imaging unit side by pressing. characterized by endoscope according to claim 1. The flexible portion is characterized by being provided freely tubular unit detachable to the insertion outer together constitute the treatment tool insertion portion, the endoscope according to claim 1. The treatment instrument insertion portion, said insertion path has an opening in the distal end surface of the distal end of the insertion portion, the flexible portion is characterized by being composed at a position facing the opening in said partition wall, wherein The endoscope according to Item 1. The flexible portion is characterized by being composed of a polymer material, an endoscope according to claim 1. The endoscope according to claim 1, further comprising a deformation amount defining mechanism that defines a deformation amount of the deformation portion. An insertion part to be inserted into the subject;
A treatment instrument insertion portion provided in the insertion portion and configured with an insertion passage through which a treatment instrument is inserted into a tubular partition;
A part of the partition wall of the treatment instrument insertion portion is configured to have a predetermined length in the circumferential direction of the partition wall and is more flexible than the other partition wall part and is pressed from outside the partition wall. The deformable portion is deformable to the insertion passage side in the radial direction of the treatment instrument insertion portion, and the diameter of the insertion passage can be partially reduced.
A pressing portion provided outside the deformation portion in the radial direction in the insertion portion, and pressing the deformation portion toward the insertion path in the radial direction;
A driving mechanism for the pressing portion;
It has
The pressing portion is a coil-shaped member that is deformed when a voltage is applied, and the driving mechanism is inserted into the insertion portion and has an electrically conductive portion whose tip is electrically connected to the coil-shaped member. An endoscope configured, wherein when a voltage is applied from a power source to the coiled member through the electrical conducting portion, the coiled member is deformed and presses the deformed portion. An imaging unit for imaging the inside of the subject is provided in the insertion unit, and the deformation unit is located opposite to the imaging unit in the radial direction, and is deformed to the imaging unit side by pressing. The endoscope according to claim 7, wherein: The endoscope according to claim 7, wherein the deforming portion is provided in a tubular unit that constitutes the treatment instrument insertion portion and is detachable from the insertion portion. The treatment instrument insertion portion is configured such that the insertion passage has an opening at a distal end surface of the distal end of the insertion portion, and the deformation portion is configured to face the opening in the partition wall. The endoscope according to Item 7. The endoscope according to claim 7, wherein the deformable portion is made of a polymer material. The endoscope according to claim 7, further comprising a deformation amount defining mechanism that defines a deformation amount of the deformation portion.

Images