JPH03242548A - Endoescope device - Google Patents

Abstract

PURPOSE:To specify positions of defects both in directions of axis and circumference of a pipe by providing a coil for a probe type eddy flaw detection at an optional location on the outer circumferential surface at the tip of an endoscope. CONSTITUTION:Illumination light is transmitted through light guide 33 and irradiate the surface 44 of a mirror from a lens system 30 to light the circumference of a pipe 40 on the side of an endoscope. The reflected light is reflected with the mirror 44 to form an image on the surface of a solid image sensor 30 via lens systems 38 and 25 and taken out as electrical signal through a signal line 32. A probe coil 45 for eddy flaw detection is provided on the outer circumferential surface of the tip of the probe 20 and a signal line 21 is connected to an eddy flaw detector. The mirror 44 and the probe coil 45 are rotated with an ultrasonic motor comprising a rotor 42 and a stator 43 to detect and observe a defect.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an endoscope device equipped with an eddy current flaw detection device.

[Prior Art] Eddy current flaw detection devices and endoscope devices have conventionally been used to inspect flaws, corrosion, etc. in pipes.

Eddy current flaw detection equipment guides eddy currents into the dielectric material using an alternating magnetic field from an eddy current detection coil that moves within the pipe (dielectric material).
The alternating magnetic field force and eddy current (electromotive force) are maintained at certain values.

However, since the eddy current is reduced due to defects such as scratches and corrosion existing in the conduit, the balance between the alternating magnetic field force and the eddy current is lost, and the impedance changes. This impedance change is used to detect damage such as scratches or corrosion.

Furthermore, an endoscope device inserts an insertion section having an observation window at its distal end into a conduit, and observes a subject image obtained from the observation window using optical or electrical means.

Further, as a device combining an eddy current flaw detection device and an endoscope device, there is a technique disclosed in Japanese Utility Model Application Publication No. 60-33313. This technology involves disposing the tip of an optical fiber for endoscopy (m < fiber scope) on the head that is inserted into the pipe, and an optical system for directing the optical axis of the optical fiber toward the pipe wall, and an optical system for eddy current testing. It is equipped with a coil.

FIG. 5 is a conceptual diagram showing this conventional configuration.

As shown in this figure, the head portion 101 inserted into the tube has an elongated cylindrical shape, and includes bobbin-type coils 102a, l.
02b, mirror 103, and optical fiber 104. The coil 102a is wound along the long axis inside the outer peripheral surface of the tip of the head portion 1ol. Behind the coil 102a, a mirror 103 tilted at 45 degrees with respect to the long axis of the head section 101 is provided at the center of the diameter of the head section 101. An optical fiber 104 is provided so that its optical axis is aligned with the center of this mirror 103 and its long axis direction is aligned with the long axis of the head section 101. At the same time, a coil 102b is provided inside the outer peripheral surface of the head section 101 and rearward along the long axis from a position equivalent to the tip position of the optical fiber 104 on the long axis. The coils 102a and 102b have different winding directions and generate magnetic fluxes in different directions, thereby eliminating noise caused by vibrations and the like. With this configuration, defective parts are detected by changes in the impedance of the coils. Impedance detection is achieved by generating an alternating magnetic field by passing a current through the coils 102a and 102b, and applying the alternating magnetic field to the object (dielectric material). Eddy currents are generated, and a balance is maintained between these eddy currents and the alternating magnetic field. However, if there is a defective part in the object, the value of the eddy current changes, and a back electromotive force is added to the alternating magnetic field, causing a change in the value of the current flowing through the coil. That is, the coil impedance changes and the balance is lost. The defective part was detected by detecting the impedance change at this time using a Whiston bridge circuit or the like. There was also a similar configuration in which the mirror 103 was provided so as to be rotatable 360 degrees along the outer circumference with the long axis direction as the rotation center.

With such a configuration, conventionally, the head portion 101 was installed inside the pipe.
Insert the bobbin type coils 102a and 102b to find defective parts such as scratches and rot, and remove the defective parts with ξG-10.
3 and an optical fiber 104 for observation.

[Problem to be solved]

However, in this configuration, the bobbin type coil 102a102b
Although it is possible to find out where in the long axis direction the defective part that has occurred inside the tube is located, it is not possible to know where on the inner periphery the defective part is located. ff, since the bobbin type coils 102a and 102b are coils wound along the outer circumference of the head 101, a uniform alternating magnetic field is generated everywhere on the outer circumference of the head 101.

Therefore, impedance changes occur uniformly at any part on the outer circumference, and although it is possible to identify where in the long axis direction the impedance change occurs, at what part on the inner circumference of the pipe the impedance change occurs. It was not possible to determine whether it was alive. Therefore, there is a spatula F″10 in the pipe.
1, the mirror must be rotated 360 degrees at the location where the impedance change occurs to find out where the defective part is, which is troublesome.

The present invention has been developed in view of the above-mentioned problems, and provides an eddy current flaw detection device that can identify not only the position in the longitudinal direction of the pipe but also the position on the inner circumference thereof, and the An object of the present invention is to provide an endoscope device comprising an optical system for observing the position of the object.

[Means for Solving the Problems] In order to achieve the above object, an endoscope device of the present invention is provided with an eddy current flaw detection coil at its distal end, in which the central axis of the eddy current flaw detection coil is inside the endoscope device. It faces approximately in the circumferential direction of the distal end of the endoscope, and the distal end rotates about the long axis of the endoscope as a rotation axis.

[Effect]

In the endoscope device configured as described above, the eddy current flaw detection coil is not a bobbin-type coil located along the outer circumference of the endoscope tip, but is placed anywhere on the outer circumferential surface of the endoscope tip. A coil is installed with the normal line as the winding axis, and in order to detect defects, the tip of the endoscope rotates with the long axis as the rotation axis, so it can cover the entire 360-degree inner circumference of the tube into which it is inserted. Can be detected.

〔Example〕

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

1 and 2 relate to a first embodiment of the present invention, FIG. 1 is an overall explanatory diagram of an endoscope apparatus, and FIG. 2 is a sectional view of the distal end portion of the endoscope.

In FIG. 1, an endoscope device 1 includes an endoscope 2, a light source device 3 that supplies illumination light to the endoscope, and a camera control unit (hereinafter abbreviated as CCU) 4 that includes a video signal processing circuit. , a videotape recorder that records images (
Hereinafter, it will be abbreviated as VTR. ) 5, a monitor 6 for displaying endoscopic images, and an eddy current flaw detection device 7.

The endoscope 2 includes an insertion section 8, and an operation section 9 is connected to the rear end of the insertion section 8. The insertion portion 8 has a distal end portion 10. Curved portion 11. A flexible IQ tube section 12 is provided at the jli, and the operation section 9 is provided at the rear end of the flexible tube section 12.
are installed in succession. The operating section 9 is provided with a bending operation knob 13 that can bend the bending section 11 in the vertical and horizontal directions, and further has a universal cord 14 extending from the side.

The rear end of the universal cord 14 has a light source connector】5
is provided and is detachably connected to the light source device 3. A signal universal cord 16 extends from the connector 15, and the signal universal cord 1
The signal connector 17 provided at the rear end of the CC
It is detachably connected to U4.

The CCU4 is connected to the VTR5, and the CCU4 is connected to the VTR5.
The video signal output from 4 can be recorded. Further, the VTR 5 is connected to the monitor 6 and the eddy current flaw detection device 7, and outputs a video signal to the monitor 6 to display an endoscope image on the screen, and also outputs an impedance change signal emitted from the eddy current flaw detection device. is the ON signal, and the signal generated when there is no change in impedance is the OFF signal, and this ○N10 FF signal is V.
It can be input via the TR remote control cable 18.

An optical adapter 19 is detachably provided on the tip 10, and an eddy current flaw detection probe 20 is provided on the optical adapter 19. This eddy current flaw detection probe 20 has a signal line 2
1 is connected to the eddy current flaw detection device 7.

In FIG. 2, the endoscope tip 10 includes a rigid cylindrical tip component 24 in which an observation hole 22 and an illumination hole 23 are provided. A lens system 25 and a light distribution lens system 26 are provided in the illumination through hole 23, respectively. A cylindrical member 27 is externally fitted and fixed to the rear part of the tip component 24 . Inside the cylindrical member 27, a first prism 28 is provided with an inclined surface 28 on the optical axis of the objective lens system 25.
A is provided with the slope 28a facing backward, and this slope 28a
A wedge-shaped second prism 29 is provided with its acute angle facing forward. A solid-state image sensor 30 is provided at the rear end of the second prism 29. Solid-state image sensor 30
A subject image is formed on the imaging surface by the objective lens system 25, and is exchanged into an electrical signal. The solid-state image sensor 30 is provided on a substrate 31 on which electronic circuits and the like are mounted. A signal line connecting portion 31a is formed at the rear end of the substrate 31, and a plurality of signal lines 32 are connected to this signal line connecting portion 31a. The signal line 32 is connected to the insertion section 8, the operating section 9 shown in the first [ffl], and the universal cord 1.
4, light source connector 15, and signal universal cord 16
It is connected to a video signal processing circuit (not shown) built in the CCU 4 via a signal connector 17 and a signal connector 17 .

Furthermore, a light guide fiber 33 for transmitting illumination light is inserted into the cylindrical member 27 and has an output end face on the rear end face of the light distribution lens system 26 . The light guide fiber 33 is connected to the light source device 3 via the insertion section 8, the operation section 9, the universal cord 14, and the light source connector 15.

The rear end of the cylindrical member 27 is connected to the frontmost curved section 34 among the plurality of curved sections constituting the curved section 11 . Further, a connecting ring 35 is rotatably fitted onto the outer circumferential surface of the central portion of the cylindrical member 27 . A male tapered portion 35a is formed on the outer circumferential surface of the connecting ring 35 on the tip side, and a finger hook portion 35b for rotating the connecting ring 35 is formed on the rear portion.

The optical adapter 19 is attached to the tip component 24 . A recess 36 into which the tip component 24 is inserted is provided at the rear end of the optical adapter 19.

A female screw portion 37 is provided on the inner circumferential surface of the rear end of the recess 36 and is screwed into the male screw portion 35a. In addition, the objective lens system 2 is attached to the distal end component 24.
A viewing angle conversion lens system 38 and an illumination light transmission lens system 39 are provided, respectively, with their optical axes aligned with those of the light distribution lens system 26 .

A groove 19a is provided in which the diameter of the tip of the optical adapter 19 is slightly narrower, and the stator 43. A rotor 42 and a ring-shaped member 41 are provided. The stator 43 has a ring shape with an inner diameter approximately equal to the outer circumference of the groove 19a and an outer diameter approximately equal to the outer diameter of the optical adapter 19, and is fitted into the groove 19a and joined to the optical adapter 19. There is. The rotor 42 has approximately the same shape as the stator 43, and is fitted into the groove 19a so as to be in close contact with the stator 43. The ring-shaped member 41 has a ring shape in which the rear outer diameter is approximately equal to that of the optical adapter 19 and the outer diameter gradually increases toward the front. It is inserted and fitted so that it can rotate freely. A ring-shaped slip ring 48 is provided at the tip of the narrow diameter portion inside the ring-shaped member 41 so as to surround the photographing system and the illumination system.

Furthermore, a mirror surface 4 is formed by cutting a cylindrical prism at an angle of 45° to the long axis and thinly coating aluminum on the cut surface.
An eddy current flaw detection probe 20 having a shape in which the tip 4 is inclined at approximately 45 degrees with respect to the end surface of the tip is disposed facing the step ring 48 and the ring-shaped member 41. A probe-shaped coil 4 is located at the center of the bottom of the eddy current flaw detection probe 20.
5 is provided. Near the apex angle of the eddy current flaw detection probe 20, the eddy current flaw detection probe 20 and a ring-shaped member 4 are arranged.
A rod-shaped stay 46 that connects 1 has one end fitted near the apex angle and the other end fitted into a part of the ring-shaped member. Further, a stay 47 is provided near the bottom surface of the eddy current flaw detection probe 20 and on the apex side of the probe shaped coil 45, one end of which is fitted near the bottom surface of the eddy current flaw detection probe 20, and the other end of the stay 47 It is arranged in contact with the slip ring 48. Furthermore, an electrode 49 is embedded in the other end of the stay 47 and is arranged to be slidable with respect to the slip ring 48, forming an electrical contact with the slip ring 48. The electrode 49 is electrically connected to the probe-shaped coil 45 via wiring 50, and the signal line 21 extends from the slip ring 48.

Next, the operation of the endoscope apparatus configured as described above will be explained.

The illumination light supplied from the light source device 3 is transmitted through the light guide fiber 33, exits through the light distribution lens system 26 and the illumination light transmission lens system 39, and is irradiated onto the other surface 44. The illumination light irradiated onto the ξ mirror surface 44 has its optical axis tilted by 45 degrees and illuminates the inner peripheral portion of W40 on the side portion of the endoscope. The reflected light from the inner circumferential surface of the tube 40 is inclined by 45 degrees by the mirror surface 44 and travels toward the long axis direction. The solid-state image sensor 30 then passes through the viewing angle conversion lens system 38 and the objective lens system 25.
The image is formed on the imaging plane. The formed optical image is converted into an electrical signal and output to a video signal processing circuit (not shown) of the CCU 4 via the signal line 32. The video signal processing circuit generates a video signal from the input electrical signal, and the video signal is converted to VT.
It is output to R5 and the monitor 6, and an image of the inner peripheral surface of the tube 40 is displayed on the screen of the monitor 6.

At this time, mirror 4 is used to observe 360 degrees of the inner surface of tube 40.
Rotate 4. Its action is shown below.

First, an ultrasonic motor consisting of a rotor 42 and a stator 43 is rotated to rotate the ring-shaped member 41 joined to the rotor 42. Therefore, the rotational force is transmitted to the stay 46 and the eddy current flaw detection probe 20 which are joined to the ring-shaped member 41, and rotate together with the ring-shaped member 41. Due to this rotation, the probe-shaped coil 45 provided on the bottom surface of the eddy current flaw detection probe 20 also rotates around the tube 40 in the same manner as the ring-shaped member 41.
rotates 360° along the inner peripheral surface of the Simultaneously with this rotation, a current is applied to the probe-shaped coil 45. This current generates an alternating magnetic field around the coil, and this alternating magnetic field generates an electromotive force on the inner peripheral surface of the tube 40 facing the probe-shaped coil 45, causing an eddy current to flow. In this way, the eddy current flaw detection probe 20 of the endoscope is moved inside the tube 40 without rotating, and the inner peripheral surface of the tube 40 is thoroughly searched. Here tube 40
If there is a defect on the inner peripheral surface of the coil, the eddy current changes, causing electromagnetic induction and causing a change in the value of the current flowing through the coil.

The impedance change of the coil at this time is the wiring 50. Electrode 49. Slim ring 48. It passes through the signal line 21 and is sent to the eddy current flaw detection device 7. The eddy current flaw detector 7 that receives this impedance change signal outputs an OFF signal force output to the VTR 5 when there is no change in impedance, and outputs an ON signal to the VTR 5 when a change occurs in impedance. Upon receiving the ON signal, the VTR 5 starts recording operation. When the probe-shaped coil 45 detects a defective part in this way, recording is started. However, at this point, the image displayed on the monitor 6 and VTR 5 is at a position 180" opposite to the position of the defect on the inner circumferential surface of the tube 40. Therefore, the eddy current flaw detection probe 20 is further positioned on the inner circumferential surface of the tube 40. 180 along the surface
When rotated, the defective area was detected on monitor 6 and VTR 5.
will be displayed on the screen.

However, the signal from the eddy current flaw detection device 7 is combined with the video signal, and V
It may also be recorded on TR5.

As described above, according to this embodiment, since the eddy current flaw detection probe 20 rotates along the inner circumferential surface of the tube 40, the probe-shaped coil 45 rotates along the inner circumferential surface of the tube 40, so the probe-shaped The coil 45 is capable of detecting a defect site over the entire 360-degree circumferential surface of the tube. Here, the rotation of the ultrasonic motor that rotates the eddy current flaw detection probe 20 may be controlled by determining the pulse wave required for one rotation and controlling the output of the pulse wave, or by rotating the eddy current probe 20 at a constant speed and controlling its angular velocity. You can also find it from time.

Alternatively, a detection sensor may be used. Furthermore, in this embodiment, since both the probe-shaped coil 45 and the reflection mirror 44 are integrally disposed in the eddy current flaw detection probe 20, the tube 40
Only one motor is needed to detect the inner periphery of the endoscope and rotate the observation coil and mirror, making the endoscope device more compact, lighter, simpler, and lower in cost.

FIG. 3 is a sectional view of the distal end portion of an endoscope according to a second embodiment of the present invention. Furthermore, the same reference numerals are given to the same constituent members as in the first embodiment, and the explanation thereof will be omitted.

The endoscope distal end 10 of this embodiment has a shape consisting of a cylindrical main body 10a and a cylindrical groove 10b whose distal end has a smaller outer diameter than the main body 10a. This tip 10
The objective lens system 25. Solid-state image sensor 30. Signal line 32
are provided for each. At the same time, a stator 43 is inserted into the groove 10b and is connected to the tip 10 at the contact point between the main body 10a and the groove 10b. Further, a slip ring 48 is fitted onto the outer peripheral surface of the outermost edge of the groove portion 10b, and is electrically connected to the eddy current flaw detection device 7 (not shown) via a signal line 21.

An optical adapter 19 is rotatably provided at the tip 10. At the rear end of this optical adapter 19,
The adapter body 19a is composed of a fitting part 19b into which the groove part 10a is rotatably inserted, and the other part of the adapter main body 19a. A rotor 42 having the same shape as the stator 43 is joined to the end surface of this fitting portion 19b. The connection is such that the stator 43 and the rotor 42, which are joined by fitting the fitting part 19b into the groove part 10b, are brought into close contact with each other. The electrode 49 is inserted into the fitting part 1 so as to face the slip ring 48 provided in the groove part 10b.
It is buried on the outer circumferential surface of the tip of 9b.

Further, the electrode 49 has electrical contact with the slip ring 48. Inside the adapter body 19a, an adapter lens 51, a triangular prism 52, and a cover glass 53 are provided as an imaging optical system from the fitting part 19b side, with the optical axis aligned with the objective lens system 25. There is. The triangular prism 52 is connected to the adapter lens 51.
and the optical axis, the exit surface is oriented perpendicularly to the optical axis, the incident surface is oriented parallel to the optical axis, and the slope is inclined at 45 degrees to the optical axis. constitutes a total reflection surface 52a. The cover glass 53 is provided on the outer peripheral surface of the adapter body 19a so as to face the exit surface of the triangular prism 52. Furthermore, a light source 54 is provided at the tip of the adapter body 19a as an illumination optical system.
and a lighting cover glass 55. The light source 54 has an optical axis in the same direction as the optical axis of the cover glass. The illumination cover glass 55 is provided on the outer peripheral surface of the adapter body 19a so that the light beam emitted from the light source 54 is transmitted therethrough. Further, a probe-shaped coil 45 is provided as an eddy current flaw detection probe on the outer peripheral surface of the rear end of the adapter body 19a and on the same side as the illumination cover glass 55 and the cover glass 53, and is provided on the fitting portion 19b. The electrode 49 is electrically connected with a wiring 50.

The operation of the second embodiment configured as described above will be explained.

The endoscope device of this embodiment is inserted into a tube (not shown) to observe a defective site. During this observation, an ultrasonic motor is driven by a rotor 42 and a stator 43, and an optical adapter connected to the rotor 42 is used. 19, the rotor 42 is rotated along the inner circumference of the tube. Therefore, the probe-shaped coil 45 built into the optical adapter 19 and both the imaging and illumination optical systems move in a spiral around the inner circumference of the tube. The illumination light supplied from the light source 54 is emitted from the illumination cover glass 55 and is irradiated onto the inner peripheral surface of the tube (not shown). The light reflected from the inner peripheral surface of the tube is reflected by the cover glass 53.
．． Triangular prism 52. Adapter lens 51. The image is formed on the imaging surface of the solid-state image sensor 30 via the objective lens system 25 .

The formed optical image is converted into an electrical signal and output via a signal line 32 to a video signal processing circuit of a CCU (not shown). From the output, an image of the inner peripheral surface of the tube is displayed on a monitor (not shown).

At the same time, when the probe coil 45 discovers a defective area on the inner circumferential surface of the tube, the signal is sent to the wiring 50. Electrode 4
9. Slip ring 48. The defect signal is transmitted to an eddy current flaw detector (not shown) via the signal line 21 and displayed. Therefore, the observer reads the defect signal generated by the eddy current flaw detection device and performs the observation from the observation monitor at that position. However, the probe-shaped coil 45 of this embodiment does not need to be located on the exit side of both the illumination and observation light beams, and may be placed anywhere on the outer peripheral surface of the adapter body 19a.

With such a configuration and operation, in addition to the same effects as in the first embodiment, both the optical adapter 19 and the tip 10 have a cylindrical shape and there is no external protrusion, so there is no need to worry about anything when inserting or removing the adapter. There is no risk of getting caught in the optical system, and there is no problem of dust or the like adhering to the optical system, which would significantly reduce the accuracy of imaging and illumination.

FIG. 4 is a sectional view of the distal end portion of an endoscope according to a third embodiment of the present invention. Furthermore, the same reference numerals are given to the same tank bottom members as in the first embodiment and the second embodiment, and the explanation thereof will be omitted.

In this embodiment, the shape of the tip portion 10 and the objective lens system 25 are
．． Stator 43. Solid-state image sensor 30. Each configuration of the signal line 32 is the same as in the second embodiment. As in the first embodiment, the slip ring 48 is disposed on the tip surface of the groove 10b, and has a ring shape having an inner diameter slightly larger than the outer diameter of the objective lens system 25 so as to surround the tip surface of the objective lens system 25. It is buried in Furthermore, as an illumination system, one end is connected to a light source device 3 (not shown), the other end is expanded into a conical shape behind the solid-state image sensor 30, and the objective lens system 25. Solid-state image sensor 30
The groove 10b is arranged so as to wrap around the outer periphery of the
The slip ring 48 is embedded in a ring shape larger in diameter than the slip ring 48 at the end face thereof. Further, the optical adapter 19 also includes an adapter body 19a, a fitting part 1, and a fitting part 1, as in the second embodiment.
9b, rotor 42. Adapter lens 51. A triangular prism 52° cover glass 53 is provided, and the optical adapter 19 is rotatable relative to the tip 10. The electrode 49 is embedded on the rear end surface of the fitting portion 19b so as to face the slip ring 48. A transparent probe-shaped coil 58 is provided on the exit surface of the cover glass 53, which is connected to a transparent electrode coil. Furthermore, it has an electrical connection with an electrode 49. The optical adapter 19 has a ring-shaped light guide 5 having one end surface having the same shape as the other end surface of the light guide 56.
7 is provided. The one end surface of the ring-shaped light guide 57 and the other end surface of the light guide 56 are embedded in the end surface of the fitting portion 19b so as to face each other. Since this ring-shaped light guide 57 is configured to surround the optical axis of the imaging system, the cover glass 53. triangular prism 52
．． It has a hook-shaped shape surrounding the adapter lens 51. The other end surface of the ring-shaped light guide 57 has a circular shape surrounding the transparent probe-shaped coil 58 and is disposed on the outer peripheral surface of the adapter body 19a.

The operation of this embodiment with the above configuration will be described below.

Illumination light supplied from a light source device (not shown) is transmitted to the light guide 57 and is emitted onto the inner peripheral surface of the tube (not shown). Since the optical adapter 19 rotates as in the second embodiment, the illumination light also travels spirally on the inner peripheral surface of the tube. The light beam reflected from the inner periphery of this tube passes through a transparent probe-shaped coil and enters the cover glass. The following description will be omitted since the transmission of images by the photographing system and the signal of the defective site sent from the transparent probe coil through the wiring 50 are the same as in the second embodiment.

Based on the above configuration and operation, this embodiment has the following effects in addition to the effects of the second embodiment. In the illumination method of this embodiment, the light source is not provided at the tip of the optical adapter 19 and is transmitted through the light guide, so the endoscope can be made more compact and lightweight than when the light source is provided at the tip. Therefore, it is possible to reduce the mechanical load applied to the rotor 42 and stator 43, which is good.

〔Effect of the invention〕

As described above, according to the present invention, in detecting a defective site existing on the inner circumferential surface of a tube, it is possible to identify not only the position in the long axis direction of the tube but also the position on the circumferential surface 360 degrees at that position. can be specified.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the entire endoscope apparatus showing the first embodiment;
The figure is a sectional view of the tip of an endoscope showing the first embodiment, Figures 3 and 4 are sectional views of the tip of the endoscope showing the second and third embodiments, and Figure 5 is a conventional It is a conceptual diagram showing the technology. 1 --- Endoscope device 2 ・-- Endoscope 3 --- Light source device 4 --- Camera control unit 5 ---
---Video tape recorder 6--Monitor 7--1.-Eddy current flaw detection device

Claims (1)

[Scope of Claims] An endoscope device having an eddy current flaw detection coil at its distal end, wherein the central axis of the eddy current flaw detection coil is oriented substantially in the circumferential direction of the endoscope distal end, and An endoscope device characterized in that it rotates about the long axis of a mirror as a rotation axis.