JP4789610B2 - Endoscopic inspection tool and endoscope system - Google Patents

Description

  The present invention relates to an endoscope system including an endoscope having an insertion portion having an imaging portion that is inserted into a body cavity, for example, in diagnosis, examination, or treatment, and an endoscope that is detachable from the endoscope. The present invention relates to a mirror inspection tool.

  2. Description of the Related Art In recent years, various endoscopes used for diagnosis, inspection or treatment of organs and living tissues in body cavities, or inspection of industrial plants and the like are widely used. These endoscopes have various visual field ranges depending on the purpose of use.

Moreover, the conventional endoscope cannot determine how much the resolving power of the imaging part of the endoscope is on the user's own site at the site of endoscopy. Therefore, for example, in Patent Document 1, when observing a minute part in an organ or the like, or when observing a fine part inside a complicated machine, it is important to have a clear image and quality of an endoscope. A simple image confirmation device for confirming whether a trouble has occurred in an imaging unit of an endoscope is disclosed.
JP 2002-272670 A

  Conventionally, in order to select an endoscope having a visual field range suitable for the purpose of use, the user uses a plurality of endoscopes with different visual field ranges and photographs the palm as a subject, etc. There was no other way to compare the differences in the range.

  However, the simple image confirmation device described in Patent Document 1 can confirm the image and image quality of an endoscope, but cannot compare the visual field ranges included in various endoscopes.

  For this reason, it is difficult for the user to always grasp the visual field range of various endoscopes under the same conditions, and it is easy to quantitatively evaluate the difference in the visual field range of various endoscopes. I could not.

  Therefore, the present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an endoscopic inspection capable of simply and quantitatively evaluating the visual field range of an endoscope. A tool and an endoscope system.

An endoscopic inspection tool according to one aspect of the present invention is an endoscopic inspection tool that evaluates the visual field range of an endoscope , and is configured to recognize the viewing angle of the endoscope. The first index with characters for identifying the viewing angle when the observation window is positioned at a predetermined position, and the first index so that the field of view of the endoscope can be recognized And a second index which is a distinguished pattern .

An endoscope system according to an aspect of the present invention includes a first endoscope provided with a first observation unit having a predetermined visual field range, and a second visual field range wider than the first endoscope. The second endoscope provided with the observation means and the first observation means of the first endoscope or the second observation means of the second endoscope are positioned at predetermined positions. A first index with characters for identifying the viewing angles of the first endoscope and the second endoscope at the time, the first endoscope and the second endoscope And a second index which is a pattern distinguished according to the first index so that the difference in the visual field range can be recognized .

  ADVANTAGE OF THE INVENTION According to this invention, the inspection tool for endoscope which can evaluate the visual field range which an endoscope has easily and quantitatively, and an endoscope system are realizable.

  Hereinafter, an embodiment according to an endoscope of the present invention will be described with reference to the drawings. In the description of each embodiment below, a flexible endoscope used in the medical field will be described as an example, but of course, also in a rigid endoscope and an endoscope used in the industrial field, Since the same effects are obtained and the basic configuration is substantially the same, the description thereof is omitted.

(First embodiment)
First, a first embodiment of the present invention will be described.
1 to 9 relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing a distal end portion of an endoscope and an endoscope inspection tool, and FIG. 2 is an endoscope inspection tool. FIG. 3 is a cross-sectional view of the endoscope inspection tool, FIG. 4 is a plan view showing one surface of the index sheet, and FIG. 5 illustrates a state in which the index sheet is installed on the endoscope inspection tool. FIG. 6 is a view showing a state where the endoscope inspection tool is attached to the distal end portion of the endoscope, FIG. 7 is a cross-sectional view of the endoscope inspection tool attached with the endoscope, and FIG. Is a diagram showing an endoscopic image captured by the first endoscope, and FIG. 9 is a diagram showing an endoscopic image captured by the second endoscope.

As shown in FIG. 1, the endoscope system 1 according to the present embodiment includes an endoscope 2 and an endoscope inspection tool 20.
The endoscope includes a distal end portion 3, a bending portion 4, and a flexible tube portion (not shown), and includes an elongated and flexible insertion portion 5 that is inserted into a body cavity. Although not shown at the base end of the insertion portion 5, an operation portion (reference numeral 10 in FIG. 14) and a light source device (reference numeral 54 in FIG. 14) extending from the side of the operation portion, A universal cord (reference numeral 10a in FIG. 14) connected to a video processor (reference numeral 53 in FIG. 14) or the like is provided.

  As described above, the insertion portion 5 includes, in order from the distal end side, the distal end portion 3 formed of a hard member and a bending portion formed by bending a plurality of bending pieces so as to be able to bend in the vertical and horizontal directions, for example. 4 and a flexible tube portion (not shown) having flexibility.

  An observation window 6 for capturing an optical image, two illumination windows 7a and 7b for irradiating illumination light, and an opening face the observation window 6 on the distal end surface of the distal end portion 3 to supply air and water. An A / W (air / water) nozzle 8 and an opening of an endoscope channel 9 through which a treatment instrument or the like is inserted are disposed.

  In the distal end portion 3, a lens unit (not shown) that collects the imaging light incident from the observation window 6 and an imaging unit (not shown) such as a CCD or a CMOS that images the imaging light are incorporated. . The optical image condensed on the image pickup means is displayed on the monitor (reference numeral 52 in FIG. 14) from the video processor via the universal code.

  The endoscope inspection tool 20 is made of, for example, a transparent synthetic resin such as acrylic, and has a cylindrical body 21 serving as an index portion with one end closed, and a cylindrical shape extending from the center of the closed surface. And an endoscope mounting portion 22 as attachment means.

  As shown in FIG. 2 and FIG. 3, the endoscope mounting portion 22 penetrates to the inside of the cylindrical body 21 and is fixed to the closed surface of the cylindrical body 21. A disc-shaped stopper 23 having a hole at the center is fixed to an end portion of the endoscope mounting portion 22 located in the cylindrical body 21.

  In the cylindrical body 21 of the endoscope inspection tool 20, an index sheet 24 shown in FIG. 4 is formed into a cylindrical shape as shown in FIG. 5 and inserted along the inner peripheral surface.

  In the index sheet 24, a first index 25 and a second index 26 are printed on the surface of a white rectangular sheet body 24a formed of paper, cellophane, or the like. In the sheet body 24 a, the long side length is set to be substantially the same as the inner peripheral length of the cylindrical body 21, and the short side length is set to be substantially the same as the cylindrical length of the cylindrical body 21. .

  The first index 25 of the present embodiment is an index printed by arranging, for example, numbers from −8 to 15 as characters at regular intervals in the short side direction of the sheet body 24a. The first index 25 is not limited to the number of -8 to 15, but is a striped pattern, a grid pattern, or a dot pattern that are distinguished at a predetermined regular interval in the short side direction of the sheet body 24a. Or a picture.

  In addition, the second index 26 of the present embodiment is a stripe printed at predetermined equal intervals so as to extend in the long side direction of the sheet body 24a in accordance with the numbers 0 to 6 of the first index 25. It is a pattern. For example, the second index 26 may be a striped pattern that is distinguished by color-coded lines, or may be a striped pattern that is distinguished by lines having different shades.

  The second index 26 is similar to the first index 25 described above, and can distinguish the short side direction of the sheet body 24a, and is arranged in a lattice pattern and dots arranged at predetermined equal intervals so as to extend in the long side direction. It may be a pattern or a picture.

  Further, the index sheet 24 is white except for a portion where the first index 25 and the second index 26 are printed.

  As shown in FIG. 5, the indicator sheet 24 is deformed into a cylindrical shape so that the short sides are adjacent to each other so that the surfaces on which the first and second indicators 25 and 26 are printed are on the inner peripheral side. It is inserted into the cylindrical body 21 of the endoscope inspection tool 20.

  At this time, the length of the long side of the sheet body 24 a is set to be approximately the same as the inner peripheral length of the cylindrical body 21, and the length of the short side is approximately the same as the cylindrical length of the cylindrical body 21. Therefore, it is arranged so as to cover the entire inner peripheral surface of the cylindrical body 21 of the endoscope inspection tool 20.

  As described above, the endoscope inspection tool 20 according to the present embodiment includes the index sheet 24.

  In the endoscope inspection tool 20, as shown in FIG. 6, the insertion portion 5 of the endoscope 2 is inserted into the endoscope mounting portion 22 from the distal end portion 3 side. At this time, the insertion portion 5 of the endoscope 2 is inserted into the endoscope mounting portion 22 until the distal end surface of the distal end portion 3 comes into contact with the stopper 23 of the endoscope mounting portion 22. The user confirms whether the distal end surface of the distal end portion 3 of the endoscope 2 is securely in contact with the stopper 23 because the end surface of the cylindrical body 21 and the endoscope mounting portion 22 are transparent members. It can be performed.

  The endoscope inspection tool 20 of the present embodiment configured as described above indicates how much a plurality of endoscopes 2 having different viewing angles have a visual field range based on an image displayed on a monitor. It can be always grasped under the same conditions, and is used for simply and quantitatively evaluating the difference in the visual field range of the plurality of endoscopes 2.

  That is, as shown in FIG. 7, for example, two endoscopes 2, that is, a first endoscope (2) having a viewing angle θ 1 and a second endoscope (2) having a viewing angle θ 2. When comparing the visual field ranges, the user inserts the insertion portion 5 of each endoscope 2 into the endoscope mounting portion 22 of the endoscope inspection tool 20 from the distal end portion 3 side.

  Here, an example is given in which the viewing angle θ1 of the first endoscope (2) is set smaller than the viewing angle θ2 of the second endoscope (2) (θ1 <θ2). explain. That is, the second endoscope (2) is a wider-angle endoscope 2 than the first endoscope (2), and the user can take an endoscope image taken by each of the endoscopes 2. The difference in the mirror image can be confirmed on the monitor.

  Specifically, when the user attaches the first endoscope 2 to the endoscope inspection tool 20, as shown in FIG. 8, the first index 25 is determined by the endoscope image 31 displayed on the monitor. It can be confirmed that the number 4 is displayed in the upper right corner of the figure. Further, the user can also confirm up to approximately three lines (lines along the number 4 of the first index 25) on both sides in the figure of the endoscopic image 31 also by the second index 26. .

  Next, when the user attaches the second endoscope 2 to the endoscope inspection tool 20, as shown in FIG. 9, the number 1 of the first index is obtained from the endoscope image 32 displayed on the monitor. Can be confirmed in the upper right corner of the figure. In addition, the user can also check up to approximately six lines (lines along the number 1 of the first index 25) on both sides of the endoscopic image 32 in the figure by the second index 26. .

  That is, the endoscope inspection tool 20 according to the present embodiment can determine the position where each endoscope 2 is mounted by the endoscope mounting portion 22, and can determine a predetermined position from the imaging optical axis of these endoscopes 2. By providing the first index 25 and the second index 26 at positions spaced apart from each other, the difference in the visual field range of each endoscope 2 can be evaluated.

  The first index 25 is an index that is easier for the user to recognize by, for example, a numerical value corresponding to the viewing angle of each endoscope 2. That is, for example, assuming that the endoscope image 31 shown in FIG. 8 is displayed by the endoscope 2 with a viewing angle of 120 degrees, the number 120 is printed at a position corresponding to the number 4 of the first index 25. The user can easily recognize that the currently confirmed endoscope 2 has a viewing angle θ1 of 120 degrees. Further, for example, when the endoscope image 32 shown in FIG. 9 is displayed by the endoscope 2 having a viewing angle of 170 degrees, the number 170 is printed at a position corresponding to the number 1 of the first index 25. The user can easily recognize that the currently confirmed endoscope 2 has a viewing angle θ2 of 170 degrees.

  Further, since the portions where the first index 25 and the second index 26 are not printed are white, the user uses the white portion of the index sheet 24 to adjust the white balance of each endoscope 2. It can be performed.

  As a result of the above, in the endoscope system 1 including the endoscope inspection tool 20 according to the present embodiment, the difference in the visual field range of the plurality of endoscopes 2 having different viewing angles under a certain condition is clarified. And the user can clearly recognize the difference. That is, the endoscope system 1 allows a user who uses a plurality of endoscopes 2 having different viewing angles to always grasp the field of view of the endoscopic image displayed by each endoscope 2 under the same conditions. It is configured so that the quantitative difference in the visual field range can be easily evaluated.

  Note that the endoscope mounting portion 22 of the endoscope inspection tool 20 is arranged on the distal end surface of the distal end portion 3 as shown in FIG. An alignment groove 23a for hooking a certain A / W nozzle 8 has a protrusion 23b provided with a stopper 23 and an alignment projection 23c inserted into the endoscope channel 9 of the endoscope 2. May be. Each of the portions 23a and 23b for alignment is provided on the stopper 23 so as not to disturb the visual field range of the endoscope 2.

  FIG. 10 is a view showing the endoscope mounting portion 22 of the endoscope inspection tool 20 in which the insertion portion 5 of the endoscope 2 for explaining the alignment groove portion 23a is inserted. 11 is a view showing the endoscope mounting portion 22 of the endoscope inspection tool 20 into which the insertion portion 5 of the endoscope 2 for explaining the alignment convex portion 23b is inserted.

  In the present embodiment, the index sheet 24 that is detachably inserted into the cylindrical body 21 of the endoscope inspection tool 20 is used. However, the first index 25 and The second index 26 may be directly printed, painted, colored, or the like.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
FIGS. 12 and 13 relate to the second embodiment, FIG. 12 is a cross-sectional view of an endoscope inspection tool to which an endoscope is attached, and FIG. 13 is a plan view showing an index body. In the description of the present embodiment, 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. 12, in the endoscope inspection tool 20a according to the present embodiment, instead of the above-described cylindrical body 21, a hole portion fixed to the middle outer peripheral portion of the endoscope mounting portion 22 is formed at the apex portion. It has the cone 27 which consists of a substantially conical transparent member formed. The cone 27 is provided with an index body 28 serving as an index portion which is a disk-shaped plate on the end surface.

  As shown in FIG. 13, a first index 29 and a second index 30 are printed on one surface of the index body 28 on the side facing the cone 27. The first index 29 of the present embodiment is a printed index in which numbers 0 to 20 are arranged at predetermined equal intervals from the center of the index body 28 toward the outer periphery. The first index 29 is not limited to the numbers 0 to 20, but may be a striped pattern, a lattice pattern, a dot pattern, a picture, or the like that are distinguished at a predetermined regular interval.

  On the other hand, the second index 30 of the present embodiment is a striped pattern printed at predetermined equal intervals along the circumference of the index body 28 according to the numbers 10 to 20 of the first index 29. It is. The second indicator 30 may also be a striped pattern distinguished by lines with different colors, for example, or may be a striped pattern distinguished by lines having different shades.

  Note that the second index 30 may also be a lattice pattern, a dot pattern, a picture, or the like arranged at predetermined equal intervals, similarly to the first index 29 described above.

  The indicator body 28 is also white except for the portion where the first indicator 29 and the second indicator 30 are printed.

  In the endoscope inspection tool 20a of the present embodiment configured as described above, the insertion portion 5 of the endoscope 2 is inserted into the distal end of the endoscope mounting portion 22 as in the first embodiment. It is inserted from the part 3 side. At this time, the user confirms whether or not the distal end surface of the distal end portion 3 of the endoscope 2 is securely in contact with the stopper 23 because the cone 27 and the endoscope mounting portion 22 are transparent members. It can be performed.

  Similarly to the first embodiment, the endoscope inspection tool 20a according to the present embodiment can determine the position where each endoscope 2 is mounted by the endoscope mounting section 22, and these By providing the first index 29 and the second index 30 at positions separated from the imaging optical axis of the endoscope 2 by a predetermined distance, it is possible to evaluate the difference in the visual field range of each endoscope 2. Yes.

  That is, also in the endoscope inspection tool 20a, the first and second indices 29 and 30 of the index body 28 are respectively photographed by the endoscope 2 having different viewing angles, as in the first embodiment. This makes it possible to clarify the difference in the field of view of the plurality of endoscopes 2 having different viewing angles under a certain condition, and to allow the user to clearly recognize the difference. That is, even in the endoscope system 1 according to the present embodiment including the endoscope 2 and the endoscope inspection tool 20a, each endoscope is used for a user who uses a plurality of endoscopes 2 having different viewing angles. Since the visual field range of the endoscopic image displayed by the mirror 2 is always grasped under the same condition, the quantitative difference in the visual field range can be easily evaluated.

  By the way, as shown in FIG. 14, the endoscope 2 that is generally not used generally has an anti-bending portion 10 b that is a base portion of a universal cord 10 a that extends from an operation portion 10 that is connected to the proximal end of the insertion portion 5. Is hooked on the hanger 59 of the hook portion 58 of the work trolley 51. In order to confirm the visual field range of the endoscope 2 when not in use, the endoscope inspection tools 20 and 20a of the above-described embodiments (the endoscope inspection tool 20 is shown in FIG. 14). May be attached to the lower end portion of the work trolley 51 where the distal end portion 3 of the insertion portion 5 of the endoscope 2 is located. That is, the endoscope inspection tool is not provided with a fixing portion for fixing the distal end portion 3. FIG. 14 is an overall configuration diagram showing an endoscope system and various devices.

  From the above, the user can confirm the visual field range of the endoscope 2 to be used on the monitor 52 before performing inspection, treatment, and the like using the endoscope 2.

  The work trolley 51 is mounted with the above-described monitor 52 for displaying an endoscope image, a video processor 53, a light source device 54, a water supply tank 55, a keyboard 56, a suction device 57, and the like. An endoscope medical system 50 is configured by the endoscope 2 and the endoscope inspection tool 20 (20a).

  As shown in FIG. 15, the endoscope medical system 50 has a distal end portion of the insertion portion 5 in a state where the folding stop portion 10 b of the endoscope 2 is hooked on the hanger 59 of the hook portion 58 of the work trolley 51. The position at which 3 is inserted into the endoscope inspection tool 20 may be determined. FIG. 15 is a general configuration diagram showing the endoscope system 1 and various devices, showing a modification.

  Specifically, as shown in FIG. 16, the endoscope inspection tool 20 does not have the endoscope mounting portion 22, and the cylinder body 21 is placed horizontally on the lower side of the work trolley 51. The fixing member 35 is fixed to the provided first beam portion 51a. FIG. 16 is a cross-sectional view of the endoscope inspection tool 20 in a state where it is fixed to the work trolley 51 of FIG. 15 and the distal end portion 3 of the endoscope 2 is inserted.

  A hole 21 a into which the distal end portion 3 and the bending portion 4 of the endoscope 2 can be inserted is formed in the closing surface of the cylindrical body 21 that is the upper end surface of the endoscope inspection tool 20.

  That is, at least the distal end portion 3 is inserted from the hole 21a in a state where the endoscope 2 is hooked on the work trolley 51, and is positioned at a predetermined height position in the cylindrical body 21 of the endoscope inspection tool 20. Is done. That is, the insertion portion 5 of the endoscope 2 is not fixed to the endoscope inspection tool 20.

  Further, the predetermined height position of the distal end portion 3 in the endoscope inspection tool 20 is such that the height adjustment of the hook portion 58 and the fixing position of the endoscope inspection tool 20 to the first beam portion 51 are performed. Set by

  With such a configuration, the user can use the monitor 52 to view the viewing angle provided by each of the plurality of endoscopes 2 having the same length of the insertion portion 5 before being used by the work trolley 51. Therefore, it is possible to easily evaluate the difference in the visual field range quantitatively.

  As shown in FIGS. 17 and 18, the insertion portion 5 of the endoscope 2 is placed on the second beam portion 51 b of the work trolley 51 in accordance with the index 5 a indicating the insertion length provided on the outer surface thereof. The distal end portion 3 may be positioned at a predetermined height in the cylindrical body 21 of the endoscope inspection tool 20 by being fixed. FIG. 17 shows a modified example, and shows a state where the distal end portion of the endoscope is inserted into the endoscope inspection tool fixed to the work trolley, and FIG. 18 shows the inner state fixed to the work trolley. It is a figure which shows the state before the front-end | tip part of an endoscope is inserted in the inspection tool for endoscopes.

  Specifically, the insertion portion of the endoscope 2 to the second beam portion 51b of the work trolley 51 provided in parallel on the upper side of the first beam portion 51a to which the endoscope inspection tool 20 is fixed. 5 is fixed. The insertion portion 5 is fixed at a predetermined height position to the second beam portion 51b by a fixing band 36 provided on the second beam portion 51b.

  The fixing position of the insertion portion 5 in the height direction is matched with the upper end of the fixing band 36 by an index 5a (a line number 10 in the drawing) for grasping the insertion length written on the insertion portion 5. Note that one end of the fixed band 36 is fixed to the second beam portion 51b, and a surface fastener is disposed on the back surface of the other end portion. Further, as shown in FIG. 18, the other end portion of the second beam portion 51b can be attached to and detached from the second beam portion 51b by being attached to or peeled from the surface fastener of the fixing band 36, as shown in FIG. A flat surface fastener 36a is provided. In addition, the structure which makes the said other end part of the fixed band 36 and the 2nd beam part 51b detachable is not limited to the hook-and-loop fastener 36a, For example, you may utilize a magnet.

  That is, the user aligns the fixing band 36 at the same reference position of each index 5a provided on the insertion portion 5 of each endoscope 2 and fixes the insertion portion 5 to the second beam portion 51b. A predetermined height position in the cylindrical body 21 of the endoscope inspection tool 20 at the distal end portion 3 inserted into the endoscope inspection tool 20 can be positioned.

  With this configuration, the user can monitor the viewing angle provided by each of the plurality of endoscopes 2 having different lengths of the insertion portion 5 before use that is hooked on the work trolley 51. 52, it is possible to easily evaluate the difference in the visual field range quantitatively.

  The invention described in each of the above embodiments is not limited to each embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment, the problems described in the column of problems to be solved by the invention can be solved, and the effects described in the effects of the invention can be achieved. In the case of being obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.

The perspective view of the endoscope system which concerns on 1st Embodiment and shows the front-end | tip part of an endoscope and the inspection tool for endoscopes. The whole block diagram which shows the inspection tool for endoscopes similarly. Sectional drawing of the inspection tool for endoscopes same as the above. The top view which shows the one surface of an index sheet | seat same as the above. The figure explaining the state by which an indicator sheet | seat is installed in the inspection tool for endoscopes. The figure which shows the state by which the inspection tool for endoscopes was mounted | worn with the front-end | tip part of the endoscope. Sectional drawing of the inspection tool for endoscopes with which the endoscope was mounted | worn with the same. The figure which shows the endoscope image which the 1st endoscope caught similarly. The figure which shows the endoscope image which the 2nd endoscope caught similarly. The figure which shows the endoscope mounting part of the inspection tool for endoscopes which showed the modification and showed the insertion part of the endoscope for demonstrating the groove part for the alignment formed in the stopper. The figure which shows the endoscope mounting part of the inspection tool for endoscopes in which the insertion part of the endoscope for illustrating the convex part for the alignment formed in a stopper is shown similarly in the same. Sectional drawing of the inspection tool for endoscopes concerning 2nd Embodiment with which the endoscope was mounted | worn. The top view which shows an indicator body similarly. 1 is an overall configuration diagram showing an endoscope system and various devices. The whole block diagram which shows a modification and shows an endoscope system and various apparatuses. Sectional drawing of the inspection tool for endoscopes of the state fixed to the work trolley of FIG. 15, and the front-end | tip part of an endoscope being inserted. The figure which shows a modification and the state which has inserted the front-end | tip part of the endoscope in the inspection tool for endoscopes fixed to the work trolley. The figure which shows the state before the front-end | tip part of an endoscope is inserted in the inspection tool for endoscopes fixed to the work trolley.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Endoscope system 2 ... Endoscope 20, 20a ... Endoscopic inspection tool 21 ... Cylindrical body 22 ... Endoscope mounting part 24a ... Sheet body 24. ..Indicator sheets 25, 29 ... first indicator 26,30 ... second indicator

Claims (7)

An endoscopic inspection tool for evaluating the visual field range of an endoscope,
A first index with a character for identifying the viewing angle when the observation window of the endoscope is positioned at a predetermined position so that the viewing angle of the endoscope can be recognized ;
A second index that is a pattern that is distinguished according to the first index so that the visual field range of the endoscope can be recognized ;
An endoscopic inspection tool characterized by comprising: Wherein the character of the first index, endoscopic Kengu of claim 1, wherein the angle der Rukoto corresponding to the viewing angle. The endoscope inspection tool according to claim 1 or 2, further comprising a mounting portion that positions and defines the position of the observation window of the endoscope at the predetermined position. The mounting portion is a cylindrical body formed of a transparent resin into which the insertion portion of the endoscope is inserted, and a distal end surface of the insertion portion abuts on an end portion of the cylindrical body, and the observation window The endoscope inspection tool according to claim 3, wherein a stopper for positioning the position of the endoscope is provided. A cylindrical body having a closed end face, and extending so that the mounting portion penetrates in the center of the end face;
A sheet body on which the first index and the second index are printed and inserted by being rolled along an inner peripheral surface of the cylindrical body;
The endoscope inspection tool according to claim 3 or 4, further comprising: The endoscopic inspection tool according to claim 5, wherein the sheet body is white in a portion where the first index and the second index are not printed. A first endoscope provided with first observation means having a predetermined visual field range;
A second endoscope comprising second observation means having a wider field of view than the first endoscope;
The first endoscope and the second endoscope when the first observation means of the first endoscope or the second observation means of the second endoscope is positioned at a predetermined position. A first index with letters identifying the viewing angle of the endoscope ;
A second index that is a pattern that is differentiated according to the first index so that a difference in field of view of the first endoscope and the second endoscope can be recognized ;
An endoscope system comprising: