JPWO2018012121A1 - Endoscope optical adapter attachment / detachment aid and endoscope system - Google Patents

Abstract

  The endoscope optical adapter attaching / detaching auxiliary tool 30 is an endoscope optical adapter attaching / detaching auxiliary tool 30 for assisting in attaching / detaching the optical adapter 20 to the distal end portion 11 of the insertion portion 10 of the endoscope 4. Auxiliary tool body 31 that accommodates the removable optical adapter 20 at the distal end 11 of the insertion part 10 of the endoscope 4 and an observation light that is provided inside the auxiliary tool body 31 and reflected by illumination light is provided in the insertion part 4. And a detection filter 36 that detects the type of the optical adapter 20 by forming an image on the image pickup device 15.

Description

  The present invention relates to an endoscope optical adapter attaching / detaching auxiliary tool and an endoscope system for attaching and detaching an optical adapter that is detachable with respect to a distal end portion of an insertion portion of an endoscope.

  In recent years, an insertion device to be inserted into a subject, such as an endoscope, has been widely used in the medical field and the industrial field. An endoscope used in the medical field is inserted into a body cavity serving as a subject by inserting an elongated insertion portion into a body cavity to be observed and, if necessary, inserted into an insertion channel of a treatment instrument included in the endoscope. Various treatments can be performed using the treatment tool.

  In addition, endoscopes used in the industrial field are designed to damage and corrode test sites in a subject by inserting the elongated insertion portion of the endoscope into a subject such as a jet engine or factory piping. Etc., various treatments, inspections, etc. can be performed.

  In particular, in an endoscope in the industrial field, an adapter-type endoscope having an optical adapter that is detachable with respect to a distal end portion of an insertion portion is known. There are a plurality of types of optical adapters used for adapter-type endoscopes. By attaching to the tip of the insertion portion of the endoscope, it is possible to change optical characteristics such as viewing angle and observation direction. .

  In recent years, along with the reduction in the diameter of the insertion portion, the optical adapter has also been reduced in size and diameter, making it difficult to attach and detach the optical adapter from the distal end portion of the endoscope. As a countermeasure against these problems, a technique for improving workability at the time of attachment is known by using an optical adapter attachment / detachment assisting tool capable of gripping the outer periphery of the optical adapter.

  For example, Japanese Patent Application Laid-Open No. 2015- 211730 discloses an endoscope system in which an optical adapter identification function for identifying the type of an optical adapter is provided in an optical adapter attachment / detachment aid. In this endoscope system, for example, an auxiliary tool mounting portion is provided on the outer surface of the housing, and it is necessary to determine the type of the optical adapter by inserting the optical adapter attaching / detaching auxiliary tool into the auxiliary tool mounting portion.

  Japanese Unexamined Patent Application Publication No. 2014-235239 discloses an endoscope system that detects return light of illumination light and identifies the type of optical adapter. The endoscope system includes a first light guide member that is inserted into the insertion portion and guides the illumination light emitted from the light source to the distal end of the insertion portion, and the illumination light is guided to the distal end of the insertion portion. A part of the leaked light is transmitted or reflected by a different type of identification member for each optical adapter.

  Furthermore, the endoscope system includes a second light guide member that guides return light that is inserted into the insertion portion and transmitted or reflected by the identification member to the operation portion or the apparatus main body. Then, the endoscope system identifies the type of the optical adapter by detecting the return light guided by the second light guide member by the detection member provided in the operation unit or the apparatus main body.

  However, in the endoscope system disclosed in Japanese Patent Application Laid-Open No. 2015- 211730, for example, by providing an auxiliary tool mounting portion outside the main body housing, the main body housing becomes large, and the endoscope system can be downsized. Hinder. In addition, for example, since an auxiliary tool mounting portion is provided outside the main body housing, the type of the optical adapter is discriminated on the spot when the distal end portion of the insertion portion to be inspected is located away from the main body housing. However, it is necessary to carry the optical adapter mounting aid to the auxiliary tool mounting portion provided in the main body casing, which may reduce the inspection efficiency.

  In addition, in the endoscope system disclosed in Japanese Patent Application Laid-Open No. 2014-235239, it is necessary to provide a second light guide member that guides return light for identifying the optical adapter in the insertion portion. There is a problem that the diameter is increased.

  Therefore, the present invention provides an optical adapter attaching / detaching aid and an endoscope system that can identify the type of an optical adapter with a simple configuration without causing a decrease in inspection efficiency and an increase in the diameter of an insertion portion. With the goal.

  An endoscope optical adapter attaching / detaching auxiliary tool according to one aspect of the present invention is an endoscope optical adapter attaching / detaching auxiliary tool for assisting in attaching / detaching an optical adapter to a distal end portion of an insertion portion of an endoscope, An auxiliary instrument body that houses the detachable optical adapter at the distal end of the insertion section of the endoscope, and an observation light that is provided inside the auxiliary instrument body and that reflects or transmits illumination light is provided in the insertion section. And a detector that detects the type of the optical adapter by forming an image on the image sensor.

  An endoscope system according to an aspect of the present invention includes an endoscope including an insertion portion having a distal end portion, and an apparatus main body that is detachable from the endoscope. An optical adapter detachably attached to the distal end portion, an auxiliary tool main body that accommodates the optical adapter, and an imaging device that is provided inside the auxiliary tool main body and that provides observation light reflected or transmitted by illumination light at the insertion portion And an endoscope optical adapter attachment / detachment assisting device including a detection unit that detects the type of the optical adapter by forming an image.

It is a block diagram which shows the structure of the endoscope system concerning 1st Embodiment. It is sectional drawing which shows the structure of an optical adapter. It is a perspective view which shows the structure of the optical adapter attachment / detachment auxiliary tool for endoscopes. It is sectional drawing which shows the state with which the optical adapter was mounted | worn with the front-end | tip part of the endoscope with the optical adapter attachment / detachment auxiliary tool for endoscopes. It is a figure which shows roughly the state by which the optical adapter was mounted | worn by the front-end | tip part of the endoscope with the optical adapter attachment / detachment auxiliary tool for endoscopes. It is a figure which shows an example of the table which the memory | storage part of FIG. 5 has. It is sectional drawing which shows the state with which the optical adapter was mounted | worn with the front-end | tip part of the endoscope with the optical adapter attachment / detachment auxiliary tool for endoscopes which concerns on 2nd Embodiment. It is sectional drawing which shows the state with which the optical adapter was mounted | worn with the front-end | tip part of the endoscope with the optical adapter attachment / detachment auxiliary tool for endoscopes which concerns on 3rd Embodiment. It is a figure which shows an example of the observation plate of FIG. It is sectional drawing which shows the state with which the optical adapter was mounted | worn with the front-end | tip part of the endoscope with the optical adapter attachment / detachment auxiliary tool for endoscopes which concerns on 4th Embodiment. It is sectional drawing in alignment with the XX line of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In each drawing used in the following description, the scale of each component may be different in order to make each component large enough to be recognized on the drawing. That is, the present invention is not limited only to the number of components, the shape of the components, the ratio of the sizes of the components, and the relative positional relationship between the components described in these drawings.

(First embodiment)
FIG. 1 is a configuration diagram illustrating a configuration of an endoscope system according to the first embodiment.

  As shown in FIG. 1, an endoscope system 1 includes an endoscope apparatus 2 and an endoscope optical adapter attaching / detaching auxiliary tool (hereinafter simply referred to as an auxiliary tool) 30, and a main part is configured. ing.

  The endoscope apparatus 2 includes an endoscope 4 and an apparatus main body 6 having functions such as a monitor 6a and a video processor.

  The endoscope 4 includes an insertion unit 10 to be inserted into a subject, an operation unit 8 connected to the proximal end in the insertion direction S of the insertion unit 10, and a universal cord extending from the operation unit 8. The main part is comprised.

  The insertion portion 10 is sequentially connected from the distal end side to the distal end portion 11, the bending portion 12 configured to be bent in the vertical direction, for example, connected to the proximal end of the distal end portion 11, and the proximal end of the bending portion 12. The main portion is configured to include a flexible portion 13 that is a long flexible portion having flexibility.

  The operation unit 8 is provided with a bending operation lever 8 a for performing a bending operation on the bending unit 12. The bending portion 12 is configured to bend upward or downward, for example, via a wire (not shown) disposed in the insertion portion 10 from the operation portion 8 in response to the turning operation of the bending operation lever 8a. ing. The bending direction of the bending portion 12 is not limited to the vertical direction, and may be the horizontal direction.

  In addition to the bending operation lever 8a, the operation unit 8 is provided with switches 8b for instructing an endoscope function.

  The universal cord 5 is provided with a connector 5a at its extended end, and is detachably connected to the apparatus main body 6 via the connector 5a. In the universal cord 5, a light guide 14 (see FIG. 4) that extends from the apparatus main body 6 and transmits illumination light from the apparatus main body 6, and an image sensor 15 (FIG. 4) provided at the tip thereof in the tip portion 11. 4), a signal cable 16 (see FIG. 4) connected to the imaging unit is inserted.

  On the monitor 6 a of the apparatus body 6, an endoscopic image captured by the imaging element 15 of the imaging unit provided in the distal end portion 11 is displayed. In addition, various devices such as a control unit 61 (see FIG. 5) that performs image processing and various controls and a recording device that records the processed image are provided inside the apparatus main body 6. The detailed configuration of the apparatus main body 6 will be described with reference to FIG.

  The auxiliary tool 30 holds the optical adapter 20 shown in FIG. 2 to be described later, and assists in attaching / detaching the optical adapter 20 to / from the distal end portion 11 of the insertion portion 10 of the endoscope 4.

  Next, the configuration of the optical adapter 20 will be described with reference to FIG. FIG. 2 is a cross-sectional view showing the configuration of the optical adapter.

  The optical adapter 20 includes a substantially cylindrical lens holding frame 21 provided on the distal end side, and an annular retaining ring 22 that is rotatably fitted to the base end portion of the lens holding frame 21. Has been.

  In the lens holding frame 21, an objective optical system 23 composed of a plurality of objective lens groups and an illumination optical system 24 composed of an illumination lens and a light guide for transmitting illumination light are incorporated.

  A female screw portion 25 is formed on the inner peripheral portion of the retaining ring 22. The optical adapter 20 is detachably mounted by screwing a retaining ring 22 to the distal end portion 11 of the insertion portion 10 of the endoscope 4, and the optical characteristics of the endoscope 4 can be changed.

  Note that there are a plurality of types of optical adapters 20, and depending on the type to be attached to the distal end portion 11 of the endoscope 4, the viewing angle can be changed such as close-up, wide angle, magnification (telephoto), direct view, side view, It is possible to change various optical characteristics such as changing the observation direction such as strabismus.

  Next, the configuration of the auxiliary tool 30 will be described with reference to FIG. FIG. 3 is a perspective view showing a configuration of an endoscope optical adapter attachment / detachment aid.

  The auxiliary tool 30 is for identifying a plurality of later-described optical adapters 20, and further, when the optical adapter 20 is attached to and detached from the distal end portion 11 of the insertion portion 10 of the endoscope 4, the optical adapter 20. Is for holding inside.

  The auxiliary tool 30 is formed of a metal such as stainless steel, a hard resin, or the like, and has a substantially cylindrical auxiliary tool main body 31 that accommodates and holds the removable optical adapter 20 at the distal end portion 11 of the insertion portion 10 of the endoscope 4. doing.

  A removable grip 32 is provided in the circumferential direction in the middle part of the auxiliary tool body 31. The detachable grip 32 is provided with, for example, a plurality of V-shaped grooves in a direction parallel to the central axis (longitudinal axis) X. The user can attach / detach the optical adapter 20 accommodated in the auxiliary tool 30 to / from the distal end portion 11 of the insertion unit 10 by holding the detachable grip 32 and rotating the auxiliary tool 30.

  Further, confirmation windows 33 for confirming that the optical adapter 20 is accommodated in the auxiliary tool 30 are provided on the distal end side of the auxiliary tool body 31 at substantially equal intervals around the circumference. Thereby, the user can confirm visually whether the optical adapter 20 is accommodated in the auxiliary tool 30 from the confirmation window 33. Moreover, the auxiliary tool main body 31 of the auxiliary tool 30 is formed with a plurality of, in this case, four slits 34 parallel to the central axis X at substantially equal intervals around the circumference from the base end to the middle part.

  Next, the configuration of the auxiliary tool 30 will be described in more detail with reference to FIG. FIG. 4 is a cross-sectional view showing a state where the optical adapter is attached to the distal end portion of the endoscope by the endoscope optical adapter attaching / detaching auxiliary tool.

  The auxiliary tool main body 31 is provided with a retaining ring grip 35 that abuts the outer periphery of the retaining ring 22 of the optical adapter 20 and holds the optical adapter 20 on the inner peripheral surface where the detachable grip 32 is disposed. The retaining ring gripping portion 35 is configured to grip the retaining ring 22 of the optical adapter 20 when the user grips the detachable grip 32.

  A detection filter 36 for detecting the type of the optical adapter 20 is provided on the inner surface of the distal end portion of the auxiliary tool body 31. The detection filter 36 is disposed at a position facing the objective optical system 23 and the illumination optical system 24 provided on the distal end side of the optical adapter 20. The detection filter 36 has a characteristic of reflecting only wavelengths (colors) of different types for each optical adapter 20.

  Next, the configuration of the apparatus main body 6 that detects the type of the optical adapter 20 will be described with reference to FIGS. 5 and 6. FIG. 5 is a diagram schematically showing a state in which the optical adapter is attached to the distal end portion of the endoscope using the endoscope optical adapter attaching / detaching auxiliary tool. FIG. 6 is a diagram illustrating an example of a table included in the storage unit of FIG.

  As illustrated in FIG. 5, the apparatus main body 6 includes a control unit 61, a light source 62, and a storage unit 63.

  The light source 62 is, for example, a xenon lamp, an LED, or the like, and is disposed to face the base end surface of the light guide 14. The light source 62 is driven by the control unit 61 under control, and the illumination light is incident on the proximal end surface of the light guide 14. The light source 62 supplies illumination light from the distal end surface of the distal end portion 11 to the proximal end surface of the illumination optical system 24 of the optical adapter 20 via the light guide 14. In addition, although the light source 62 is provided in the apparatus main body 6, you may provide in the operation part 8, for example.

  The illumination light incident on the proximal end surface of the illumination optical system 24 is emitted from the distal end surface of the illumination optical system 24 and illuminates the detection filter 36. In addition, after the optical adapter 20 is attached to the distal end portion 11, illumination light is irradiated from the distal end surface of the illumination optical system 24 into the subject in a state where the auxiliary tool 30 is detached from the optical adapter 20.

  The detection filter 36 emits reflected light having a predetermined wavelength (color) according to the type of the optical adapter 20 when illuminated with illumination light. This reflected light is imaged by the objective optical system 23 of the optical adapter 20 and imaged by the image sensor 15 at the tip 11. An imaging signal imaged by the imaging element 15 is transmitted to the control unit 61 of the apparatus body 6 via the signal cable 16.

  The control unit 61 detects the color of the reflected light (returned light) from the detection filter 36 imaged by the image sensor 15. The storage unit 63 includes a table 63a in which detection filter characteristic information is stored. As shown in FIG. 6, the detection filter characteristic information of the table 63a includes a plurality of reflected light colors (blue, red, green, yellow,...) And the type (optical) of the optical adapter 20 associated with each color. Adapter A, B, C, D,...) Is associated information. The storage unit 63 stores the type of the optical adapter 20 detected by the control unit 61.

  The control unit 61 detects the color of the return light of the detection filter 36 from the image pickup signal from the image pickup device 15, and detects the type of the optical adapter 20 attached to the distal end portion 11 by referring to the table 63 a of the storage unit 63. To do.

  As described above, the detection filter 36 forms a detection unit that detects the type of the optical adapter 20 by forming an image of the observation light reflected by the illumination light on the imaging device 15 provided at the distal end portion 11 of the insertion unit 10. To do.

  In addition to storing the detected type of the optical adapter 20 in the storage unit 63, the control unit 61 can display the detected type of the optical adapter 20 on the monitor 6a. Further, the control unit 61 can superimpose the type of the optical adapter 20 detected on the observation image while observing the subject using the endoscope 4 and can display it on the monitor 6a.

  This observation image can be stored in the storage unit 63 as a still image or a moving image. Note that the observation image may be stored in a storage device (not shown) that is detachable from the apparatus main body 6. Accordingly, the user can easily recognize the type of the optical adapter 20 used for the inspection when confirming the observation image after the inspection.

  Next, the operation of detecting the type of the optical adapter 20 attached to the distal end portion 11 will be described using the configuration shown in FIGS.

  First, the auxiliary tool 30 extrapolates the distal end portion 11 of the insertion portion 10 of the endoscope 4 from the opening of the auxiliary tool body 31 by the user from the state where the optical adapter 20 is accommodated and held in the auxiliary tool body 31. To be fitted.

  Then, the auxiliary tool 30 is rotated in a predetermined direction, and the female screw portion 25 of the retaining ring 22 of the optical adapter 20 in the auxiliary tool body 31 and the male screw portion 17 (see FIG. 4) of the distal end portion 11 are screwed together. Thus, the optical adapter 20 is attached to the distal end portion 11.

  At this time, the user grips the detachable grip 32 provided on the auxiliary tool body 31, so that the detachable grip 32 is deformed inward, and the retaining ring gripping portion 35 reliably locks the retaining ring 22 of the optical adapter 20. can do. Thereby, the user can securely fasten the retaining ring 22 of the optical adapter 20 to the distal end portion 11 by rotating the auxiliary tool 30 in a predetermined direction.

  When the optical adapter 20 is mounted on the distal end portion 11 using the auxiliary tool 30, the illumination light emitted from the light source 62 is guided from the proximal end surface of the light guide 14 to the distal end surface, and the proximal end surface of the illumination optical system 24. Is incident on. The illumination light incident on the proximal end surface of the illumination optical system 24 is emitted from the distal end surface of the illumination optical system 24 and illuminates the detection filter 36.

  The detection filter 36 reflects or excites only a specific color (wavelength) when irradiated with illumination light, and outputs reflected light. The reflected light is imaged on the image pickup device 15 by the objective optical system 23 and becomes an observation image. This observation image is transmitted to the control unit 61 of the apparatus main body 6 via the signal cable 16. The auxiliary tool 30 and the optical adapter 20 have a one-to-one correspondence, and the control unit 61 detects information (color) obtained from the transmitted observation image and the detection stored in the table 63a of the storage unit 63. The type of the optical adapter 20 can be detected by comparing with the filter characteristic information. After detection, the auxiliary tool 30 is removed from the optical adapter 20 and stored in a storage case (not shown) or the like.

  As described above, the auxiliary tool 30 accommodates the optical adapter 20 that is detachable at the distal end portion 11 of the insertion portion 10 of the endoscope 4 in the auxiliary tool main body 31, and the detection filter 36 that detects the type of the optical adapter 20. The auxiliary tool main body 31 is provided on the inner surface of the distal end portion. The endoscope system 1 detects the type of the optical adapter 20 from the reflected light obtained by irradiating the detection filter 36 with illumination light.

  With such a configuration, it is not necessary to provide a new optical fiber or the like for the type detection of the optical adapter 20 in the insertion portion 10 of the endoscope 4, and the insertion portion 10 is not increased in diameter. Further, since the type of the optical adapter 20 can be identified by irradiating illumination light when the optical adapter 20 is attached to the distal end portion 11 of the insertion portion 10 by the auxiliary tool 30, the auxiliary tool 30 is provided in the apparatus main body 6 or the like. Therefore, it is not necessary to insert it into the discriminating section, and work efficiency is not reduced. In addition, since it is not necessary to use part of the illumination light for type detection, illumination and observation performance are not deteriorated.

  Therefore, according to the optical adapter attaching / detaching aid and the endoscope system of the present embodiment, the type of the optical adapter can be identified with a simple configuration without causing a decrease in inspection efficiency and an increase in the diameter of the insertion portion. .

(Second Embodiment)
Next, a second embodiment will be described.

  FIG. 7 is a cross-sectional view illustrating a state where the optical adapter is attached to the distal end portion of the endoscope by the endoscope optical adapter attaching / detaching auxiliary tool according to the second embodiment. In FIG. 7, the same components as those in FIG. 4 are denoted by the same reference numerals and description thereof is omitted.

  The auxiliary tool 30a according to the second embodiment is configured to include a light guide ring 71, a diffusion plate 72, a light shielding ring 73, and a color plate 74 inside the distal end portion of the auxiliary tool body 31. .

  The light guide ring 71 is a transparent optical component having a substantially cylindrical shape, and is disposed at a position facing the emission surface of the illumination optical system 24 of the optical adapter 20. The light guide ring 71 is provided with a tapered gradient on the surface opposite to the exit surface of the illumination optical system 24, and the illumination light emitted from the illumination optical system 24 is directed in the center direction (a diffusion plate 72 is disposed). Direction).

  Since the auxiliary tool 30 is rotated according to the retaining ring 22 of the optical adapter 20 so that the optical adapter 20 is attached to and detached from the distal end portion 11, the rotational position of the auxiliary tool 30 is attached to the optical adapter 20. It changes with every departure. In the present embodiment, since the substantially cylindrical light guide ring 71 is used, illumination light can be sufficiently incident on the light guide ring 71 regardless of the position of the illumination optical system 24.

  The diffusion plate 72 is a cylindrical light diffusion member in which fine particles of the diffusion material are distributed substantially uniformly on the transparent member, and is disposed in contact with the inner wall of the light guide ring 71. The diffusion plate 72 is guided by the light guide ring 71, diffuses the illumination light incident from the outer peripheral surface, and irradiates the back surface of the color plate 74 (the surface opposite to the surface facing the objective optical system 23). .

  The light shielding ring 73 is a cylindrical opaque rubber or resin member. The light shielding ring 73 is disposed between the light guide ring 71 and the diffusion plate 72 and is in contact with the outer peripheral surface of the color plate 74. If the illumination light emitted from the illumination optical system 24 is directly incident on the objective optical system 23 without passing through the color plate 74, halation may occur. The light shielding ring 73 prevents the diffusion component of the illumination light from being directly incident on the objective optical system 23 without passing through the color plate 74, and prevents halation from occurring. Further, by using rubber or a resin member for the light shielding ring 73, for example, when the light shielding ring 73 contacts the objective optical system 23 or the illumination optical system 24, the objective optical system 23 or the illumination optical system 24 is not damaged. .

  The color plate 74 is, for example, a resin-made circular plate of a color determined for each type of the optical adapter 20 configured by a cut filter or a color filter. The color plate 74 emits light uniformly when illuminated with illumination light from the back surface. The light emitted from the color plate 74 is captured by the image sensor 15 and transmitted to the control unit 61 of the apparatus body 6 as an observation image.

  As in the first embodiment, the control unit 61 compares the information obtained from the transmitted observation image with the detection filter characteristic information stored in the table 63a of the storage unit 63, and applies it to the distal end portion 11. The type of the mounted optical adapter 20 is determined.

  As described above, the color plate 74 forms a detection unit that detects the type of the optical adapter 20 by forming an image of the observation light transmitted through the illumination light on the imaging device 15 provided at the distal end portion 11 of the insertion unit 10. To do.

  With such a configuration, the auxiliary tool 30a can identify the type of the optical adapter with a simple configuration without reducing the inspection efficiency and increasing the diameter of the insertion portion, as in the first embodiment. .

(Third embodiment)
Next, a third embodiment will be described.

  FIG. 8 is a cross-sectional view showing a state in which the optical adapter is attached to the distal end portion of the endoscope by the endoscope optical adapter attaching / detaching auxiliary tool according to the third embodiment. Moreover, FIG. 9 is a figure which shows an example of the observation plate of FIG. In FIG. 8, the same components as those in FIG. 4 are denoted by the same reference numerals and description thereof is omitted.

  The auxiliary tool 30b of the third embodiment has a light guide ring 81, a lens frame 82, a depth adjustment lens 83, a diffusion ring 84, and an identification plate 85 inside the distal end portion of the auxiliary tool body 31. Configured.

  The light guide ring 81 is a transparent optical component having a substantially cylindrical shape, and is disposed at a position facing the emission surface of the illumination optical system 24 of the optical adapter 20. The light guide ring 81 emits the illumination light irradiated from the illumination optical system 24 in the direction of the tip (the direction in which the diffusion ring 84 is disposed).

  The diffusing ring 84 is a substantially cylindrical light diffusing member in which fine particles of the diffusing material are uniformly distributed on the transparent member, and is disposed in contact with the distal end surface of the light guide ring 81. The diffusion ring 84 diffuses the illumination light guided by the light guide ring 81 and irradiates the identification plate 85.

  The lens frame 82 is disposed with the outer peripheral surface in contact with the inner peripheral surface of the light guide ring 81, and holds the depth adjustment lens 83 through a hole provided in the center.

  A circular identification plate 85 is provided on the distal end side of the depth adjustment lens 83. The depth adjustment lens 83 adjusts the observation depth of the optical adapter 20 and is adjusted to focus on the identification plate 85 disposed on the front surface.

  As shown in FIG. 9, the identification plate 85 is provided with a different QR code (registered trademark) C for each type of the optical adapter 20. The identification plate 85 is not limited to the QR code (registered trademark) C, and may be, for example, a barcode.

  The illumination light guided by the light guide ring 81 is diffused by the diffusion ring 84 and illuminates the identification plate 85. The image sensor 15 is illuminated with illumination light, images the QR code (registered trademark) C of the identification plate 85 imaged by the depth adjustment lens 83 and the objective optical system 23, and controls the control unit 61 of the apparatus body 6 as an observation image. Transmit to. The control unit 61 determines the type of the optical adapter 20 attached to the distal end portion 11 according to the QR code (registered trademark) C imaged by the imaging element 15.

  As described above, the identification plate 85 forms a detection unit that detects the type of the optical adapter 20 by imaging the observation light reflected by the illumination light on the imaging element 15 provided at the distal end portion 11 of the insertion unit 10. To do.

  With such a configuration, the auxiliary tool 30b can identify the type of the optical adapter with a simple configuration without causing a decrease in inspection efficiency and an increase in the diameter of the insertion portion, as in the first embodiment. .

(Fourth embodiment)
Next, a fourth embodiment will be described.

  In the fourth embodiment, an endoscope optical adapter attaching / detaching auxiliary tool capable of detecting the type of the side-viewing optical adapter will be described.

  FIG. 10 is a cross-sectional view showing a state where the optical adapter is attached to the distal end portion of the endoscope by the endoscope optical adapter attaching / detaching auxiliary tool according to the fourth embodiment, and FIG. 11 is a cross-sectional view of FIG. It is sectional drawing along the line of -X.

  As shown in FIG. 10, the side-view optical adapter 20 </ b> A is provided with an illumination window 90 and an observation window 91 on the side surface on the distal end side. In the lens holding frame 21, an objective optical system 23a composed of a prism and a plurality of objective lenses and an illumination optical system 24a composed of an illumination lens and a light guide for transmitting illumination light are incorporated.

  The illumination optical system 24a. The illumination light from the light guide 14 is guided to the illumination window 90. The objective optical system 23 a having a prism guides light from the subject that has passed through the observation window 91 to the image pickup device 15 and forms an image on the image pickup surface of the image pickup device 15.

  In the auxiliary tool 30c, the inner peripheral surface on the proximal end side of the head portion 92 is fixed to the outer peripheral surface on the distal end side of the auxiliary tool main body 31.

  In addition, the auxiliary tool 30 c includes a light guide ring 93, a diffusion ring 94, and a stripe ring 95 inside the head portion 92.

  The light guide ring 93 is a transparent optical component having a substantially cylindrical shape, and is disposed at a position where the inner peripheral surface faces the emission surface of the illumination window 90 of the optical adapter 20A. The light guide ring 93 has a tapered gradient on the surface opposite to the exit surface of the illumination window 90, and reflects the illumination light guided to the illumination optical system 24a and emitted from the illumination window 90 in the proximal direction. Let

  The diffusing ring 94 is a light diffusing member having a substantially cylindrical shape, which is disposed at the base end portion of the light guide ring 93, and as shown in FIG. The diffusion ring 94 diffuses the illumination light guided by the light guide ring 93 and irradiates the back surface of the stripe ring 95 (the surface opposite to the surface facing the observation window 91).

  A stripe ring 95 for detecting the type of the optical adapter 20 </ b> A is provided on the inner peripheral surface of the diffusion ring 94. As shown in FIG. 11, the stripe ring 95 is configured by alternately arranging color filters 95 a and 95 b of different colors. The stripe ring 95 is not limited to the color filters 95a and 95b, and may be a cut filter, for example.

  The stripe ring 95 emits light uniformly when irradiated with illumination light from the back surface. The light emitted from the stripe ring 95 is captured by the image sensor 15 and transmitted to the control unit 61 of the apparatus body 6 as an observation image.

  As in the first embodiment, the control unit 61 compares the information obtained from the transmitted observation image with the detection filter characteristic information stored in the table 63a of the storage unit 63, and applies it to the distal end portion 11. The type of the mounted optical adapter 20 is determined.

  As described above, the stripe ring 95 forms a detection unit that detects the type of the optical adapter 20 by forming an image of the observation light transmitted through the illumination light on the imaging element 15 provided at the distal end portion 11 of the insertion unit 10. To do.

  In the stripe ring 95, the color filters 95a and 95b of different colors are alternately arranged, so that the image sensor 15 images the two colors of the color filters 95a and 95b. Then, the control unit 61 detects the type of the optical adapter 20 from the two colors captured by the image sensor 15. Therefore, the auxiliary tool 30c can improve the detection accuracy compared to detecting the type of the optical adapter 20 from one color.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

  This application is filed on the basis of the priority claim of Japanese Patent Application No. 161377872 filed in Japan on July 12, 2016, and the above disclosure is included in the present specification and claims. Shall be quoted.

Claims (10)

An endoscope optical adapter attaching / detaching auxiliary tool for assisting in attaching / detaching the optical adapter to the distal end portion of the insertion portion of the endoscope,
An auxiliary tool body that houses the detachable optical adapter at the distal end of the insertion portion of the endoscope;
A detection unit that is provided inside the auxiliary tool main body and forms an image of observation light reflected or transmitted by illumination light on an image sensor provided in the insertion unit, thereby detecting the type of the optical adapter. An endoscope optical adapter attachment / detachment assisting tool characterized by the above.   The detection unit is a detection filter having a function of reflecting only a specific wavelength of the illumination light, and according to the wavelength of the observation light reflected by the detection filter imaged on the imaging element, The optical adapter attaching / detaching auxiliary tool for endoscope according to claim 1, wherein the type is detected.   The detection unit is a color filter having a function of transmitting only a specific wavelength of the illumination light, and according to the wavelength of the observation light transmitted through the color filter that forms an image on the image sensor. The optical adapter attaching / detaching auxiliary tool for endoscope according to claim 1, wherein the type is detected.   The detection unit includes a light-dark pattern detection pattern having a characteristic shape that reflects the illumination light, and the light-dark pattern observation light having the characteristic shape reflected by the detection pattern imaged on the image sensor. The endoscope optical adapter attachment / detachment assisting tool according to claim 1, wherein the type of the optical adapter is detected according to the condition.   The detection unit is at least two color filters of different colors, and detects the type of the optical adapter according to the wavelength of the observation light transmitted through the two color filters formed on the image sensor. The endoscope optical adapter attachment / detachment assisting tool according to claim 1, An endoscope device including an endoscope including an insertion portion having a distal end portion, and a device main body detachably attached to the endoscope;
An optical adapter detachably attached to the tip,
The optical adapter is configured to form an image on an image pickup device provided in the insertion unit, and an auxiliary tool main body that accommodates the optical adapter, and observation light that is provided inside the auxiliary tool main body and reflected or transmitted by illumination light. An endoscope system comprising: an endoscope optical adapter attachment / detachment assisting device including a detection unit that detects the type of the endoscope.   The detection unit is a detection filter having a function of reflecting only a specific wavelength of the illumination light, and according to the wavelength of the observation light reflected by the detection filter imaged on the imaging element, The endoscope system according to claim 6, wherein the type is detected.   The detection unit is a color filter having a function of transmitting only a specific wavelength of the illumination light, and according to the wavelength of the observation light transmitted through the color filter that forms an image on the image sensor. The endoscope system according to claim 6, wherein the type is detected.   The detection unit includes a light-dark pattern detection pattern having a characteristic shape that reflects the illumination light, and the light-dark pattern observation light having the characteristic shape reflected by the detection pattern imaged on the image sensor. The endoscope system according to claim 6, wherein the type of the optical adapter is detected according to the condition.   The detection unit is at least two color filters of different colors, and detects the type of the optical adapter according to the wavelength of the observation light transmitted through the two color filters formed on the image sensor. The endoscope system according to claim 6, wherein the endoscope system is characterized.

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