Inserting device into testee body

[Detailed Description of the Invention]

[Industrial Application] The present invention relates to the sample interpolation ON device which guides an insert portion magnetically.

[Description of the Prior Art] In recent years, in the medical field and the industrial field, an endoscope came to be used widely. In order to perform the inspection or diagnosis by the above-mentioned endoscope, it is necessary to insert an insert portion into the abdominal cavity etc. In this case, if it is not the way person who became skillful in insertion work since the insertion course is crooked in many cases, insertion may take time. Forming a ferromagnetic or a magnet in the insert portion of an endoscope, and guiding this insert portion magnetically from the outside of the body for coping with this, as shown in JP,55-133237,A, the West German patent application public presentation No. 1262276, etc. is proposed.

[Problem(s) to be Solved by the Invention] However, when a magnetic body is used for the flare portion of an insert portion, it is necessary to change the intensity of an external magnetic field and to control guidance, and there is a problem that guidance control nature is bad and a device is enlarged. There is a possibility that a magnetic body may generate heat and there is a problem in safety in a medical endoscope. In light of the above-mentioned circumstances, an object of the present invention is to be able to guide an insert portion using the magnetic field which occurs from the magnetic field generating means provided in the insert portion, and to provide the sample interpolation ON device which raised guidance control nature and safety.

[Means for solving problem] In what guides the above-mentioned insert portion using the magnetic field which the sample interpolation ON device of the present invention has an insert portion inserted into a sample, and the magnetic field generating means provided in the above-mentioned insert portion, and occurs from the above-mentioned magnetic field generating means, As the above-mentioned magnetic field generating means, the air core coil which generates a magnetic field by energization is used.

[Function] In the present invention, by energizing in an air core coil, this air core coil generates a magnetic field, and an insert portion is guided using this magnetic field. Control of guidance is possible by control of the current energized in an air core coil. If the energization to an air core coil is stopped, an air core coil will be made nonmagnetic.

[Example] Hereinafter, a detailed description of the invention is carried out with reference to drawings. The explanatory view in which Drawings 1 thru/or 4 are applied to the 1st example of the present invention, and Drawing 1 shows the important section of an endoscope apparatus, the perspective view in which Drawing 2 shows the whole endoscope apparatus, the sectional view in which Drawing 3 shows the tip part of the insert portion of an endoscope, the 4th (21 is an explanatory view showing the important section of the endoscope apparatus of the modification of this example.) As shown in Drawing 2, endoscope apparatus 1 of this example is, Endoscope 2 which is fiberscope, and light equipment 3 which supplies the illumination light to this endoscope 2, TV right camera with which eye contacting part 4 of the above-mentioned endoscope 2 is equipped, and camera control unit (it is hereafter described as CCU.) 6 which performs signal processing to this TV right camera, TV monitor 7 which inputs the picture signal outputted from this CCU6, and displays a photographic subject image, It has magnetism generator 11 allocated in the circumference of A bed 10 on which patient 9 in whom insert portion 8 of the above-mentioned endoscope 2 is inserted is placed, and control device 31 to which air core coil 30 which was provided in the above-mentioned endoscope 2, and which is mentioned below is connected. The above-mentioned endoscope 2 has insert portion 8 of the thin length who has flexibility, large final controlling element 13 is provided in the back end of this insert portion 8, and eye contacting part 4 is provided in the top part (rear end part) of this final controlling element 13. Light guide cable 14 is installed from the flank of final controlling element 13, and connector 14a connected to the above-mentioned light equipment 3 enabling free attachment and detachment is provided at the tip of this light guide 14. As shown in Drawing 3, one hard tip constituting part is provided and bent side 21 which can curve is provided behind this tip constituting part 19 at the tip side of the above-mentioned insert portion 8. The lighting window and the observation door are provided in the tip side of the above-mentioned tip constituting part 19. Light distribution lens 15 is provided inside the above-mentioned lighting window, and light guide 16 is provided in the back end of this Light distribution lens 15. This light guide 16 is inserted in in the inside of the above-mentioned insert portion 8 and light guide cable 14, and the incident end part is connected to the above-mentioned connector 14a. And the illumination light which emitted light with the lamp in the above-mentioned light equipment 3 which is not illustrated is Strategy(ed) by the condensing lens which is not illustrated, and enters into the incidence end of the above-mentioned light guide 16, and it puts it ahead eight from the above-mentioned lighting window through this light guide 16 and Light distribution lens 15. Object lens 24 is provided inside the above-mentioned observation door, and the tip side of image guide 25 is arranged in the image focus location of this object lens 24. This image guide 25 was inserted in in the inside of the above-mentioned insert portion 8 and final controlling element 13, and the rear end face is opposite to the eyepiece in eye contacting part 4 which is not illustrated. And a photographic subject's optical image illuminated by the above-mentioned illumination light is imaged by the tip side of image guide 25 with object lens 24, it is transmitted to eye contacting part 4 by this image guide 25, and expansion observation is carried out via the eyepiece of this eye contacting part 4. TV right camera with which the above-mentioned eye contacting part 4 is equipped is provided with the imaging lens which counters the above-mentioned eyepiece and which is not illustrated, and the solid-state image sensing device which is arranged in the image focus location of this imaging lens and which is not illustrated, for example, CCD. And the optical image transmitted to the above-mentioned eye contacting part 4 is imaged on CCD with the above-mentioned imaging lens, and photoelectric conversion is carried out by this CCD. Signal processing of the output signal of this CCD is inputted and carried out to CCU6, it is changed into a picture signal, and a photographic subject image is displayed on TV monitor 7 which inputs this picture signal. bent side 21 which adjoins the above-mentioned tip constituting part 19 -- joint piece 22 and 22. .. is connected mutually, enabling free rotation, and it is constituted, can curve freely to the up-and-down direction or a horizontal direction, and can curve now in the arbitrary directions by rotating the curve knob which was provided in final controlling element 13 and which is not illustrated. This bent side 21 is covered with flexible exterior covering. This insert portion 8 comprises Nonmagnetic material aluminum, a copper system alloy, a plastic, etc. which are not drawn by magnetism. As shown in Drawings 1 and 3, two air core coils 41.42 are attached to the position where the directions of an axis differ in the peripheral part by the side of the tip of the above-mentioned insert portion 8. Lead 43 connected to the both ends of this air core coil 41.42 is connected to control bag ?J L 2 through connecting cord 44 which extended from final controlling element 13 through the outside of insert portion 8, or the inside of insert portion 8. A bed 10 in which patient 9 is laid horizontally comprises nonmagnetic materials, such as wooden. The circumference of this A bed 10 is provided with magnetism Generator a 11. This magnetism generator 11 has magnetic field generation part 51 which consists of an electromagnet or a permanent magnet. It is provided on piston 52 which can move up and down and this magnetic field generation part 51 is movable to the up-and-down direction (it is considered as the direction of Z.). The lower part of this piston 52 is being fixed on movable stand 53. Rail 54 a+ to which this movable stand 53 met the longitudinal direction (it is considered as the direction of X.) of A bed 10 On base 54 which has 54 a, along with the above-mentioned rails 54a and 54a, it is attached so that movement is possible. On base 55 which has rails 55a and 55a which met in the direction of Y which intersects perpendicularly in the above-mentioned X direction and the direction of Z, along with the above-mentioned rails 55a and 55a, the above-mentioned base 54 is attached so that movement is possible. Thus, magnetic field generation part 51 can be moved now in the arbitrary directions of X, Y, and Z. On the other hand, the above-mentioned control device 31 is provided with two direct-current power supplies 32.33 and change switches 34 as shown in Drawing 1. One end of the above-mentioned air core coil 41.42 is connected to traveling contact 34a of change switch 34, and the other end is connected to the anode of power supply 32, and the cathode of power supply 33. The cathode of power supply 32 is connected to fixed contact 34b of change switch 34, and the anode of power supply 33 is connected to fixed contact 34c of change switch 34. It is not connected to 34d of another fixed contact of change switch 34 at all. Therefore, the thing for which traveling contact 34a of change switch 34 is alternatively connected to one side of fixed contacts 34b and 34c, Direction of the current energized in air core coil 41.42 can be reversed, and, thereby, the magnetism committed between air core coil 41.42 and magnetism generator 11 can be made into power of absorption or restitution. When traveling contact 34a of change switch 34 is connected to 34 d of fixed contacts, it does not energize in air core coil 41.42, but magnetism occurs between magnetism generators 11. Next, the operation of this example by which above composition was carried out is explained. After inserting insert portion 8 of endoscope 2 to some extent into samples, such as the large intestine, traveling contact 34a of change switch 34 in control device 12 is connected to one side of fixed contacts 34b and 34c, and it energizes in air core coil 41.42. Then, a magnetic field occurs from this air core coil 41.42, and the magnetism of power of absorption or restitution occurs between magnetism generators 11 arranged out of a sample. And observing the endoscope displayed on TV monitor 7, magnetic field generation part 51 of magnetism generator 11 is moved, and insert portion 8 is guided within a sample using the above-mentioned magnetism. By switching the above-mentioned change switch 34, the above-mentioned magnetism can be switched to restitution or power of absorption from restitution from power of absorption, and the attitude of insert portion 8 can also be controlled. If traveling contact 34a of change switch 34 is connected to 34 d of fixed contacts, it does not energize in air core coil 41.42, but this air core coil 41.42 will lose magnetism, that of the power of acting on insert portion 8 will be lost, and will suspend insert portion 8. Thus, according to this example, insertion of insert portion 8 to a crooked part like the large intestine becomes easy. It is control of guidance of insert portion 8 by having used air core coil 41.42 which generates a magnetic field by energization as a magnetic field generating means provided in insert portion 8, It becomes possible by control of the current energized in air core coil 41.42, and therefore regularity may be sufficient as the magnetic field which magnetism generator 11 besides a sample generates, its guidance control nature improves and the miniaturization of a device and low-cost-ization of it are attained. If the energization to air core coil 41.42 is stopped, since air core coil 41.42 makes it nonmagnetic, it will not have a possibility of generating heat and its safety will improve. In this example, air core coil 41.42 may be beforehand built in insert portion 8, and attachment and detachment of it may be enabled as an adapter. It becomes possible by using power supply 32.33 as a variable voltage power supply to adjust the magnetism which acts on air core coil 41.42. Drawing 4 shows the modification of this example. By energizing * This example provides a plurality of air core coils 61, 62, and 63.64 in the position where the directions of an axis of insert portion 8 differ, and cuts them alternatively in these coils with control device 31. Thus, it becomes controllable [ a more complicated and more delicate motion ] by energizing alternatively in coils 61 and 62.63.64. Drawings 5 thru/or 7 are applied to the 2nd example of the present invention, and the explanatory view in which Drawing 5 shows the important section of an endoscope apparatus, the circuit diagram showing the composition of a control device [ in / in Drawing 6 / the modification of this example ], and Drawing 7 are wave form charts showing the current energized in an air core coil in a modification. As shown in Drawing 5, this example provides exchange power supply 36 in control device 31, and enables connection of the above-mentioned exchange power supply 36 at air core coil 41.42 of the 1st example. If exchange current is sent through air core coil 41.42 by the above-mentioned exchange power supply 36, the magnetism which occurs between magnetism generators 11 will be reversed by turns to power of absorption and restitution, and, thereby, insert portion 8 will vibrate in the direction of an axis. And by this vibration, stillness friction between insert portion 8 and a sample decreases, and insertion of insert portion 8 becomes easier. In the above-mentioned control device 31, direct-current power supplies 32 and 33 and change switch 34 in the 1st example are also formed besides the above-mentioned exchange power supply 36, and it may enable it to energize exchange current and direct-current current alternatively in air core coil 41*42. Composition 1 other operations and effects are the same as the 1st example. Drawings 6 and 7 show the modification of this example. Variable voltage direct-current power supply 37 is connected to the above-mentioned exchange power supply 36 in series, and it enables it to superimpose direct-current current on the exchange current energized in air core coil 41.42 in this modification, as shown in Drawing 6. If direct-current current is made into zero as shown in Drawing 7 (a), insert portion 8 will vibrate in the direction of an axis centering on a predetermined position, and if direct-current current is superimposed as shown in Drawing 7 (b), insert portion 8 will move or retreat, vibrating in the direction of an axis. Drawing 8 is an explanatory view showing the important section of the endoscope apparatus in the 3rd example of the present invention. In this example, four air core coils 71, 72, and 73.74 wound around the saddle type are provided in the peripheral part of insert portion 8. air core coil 71.72 of each other being arranged in an object position, and energizing in these air core coils 71 and 72 -- a diameter direction -- magnetic flux -- generating To shake -- it is like. In the above-mentioned air core coil 71.72, in a different position in the direction of an axis of insert portion 8, air core coil 73.74 of each other is arranged in an object position, and is arranged [ coil / 71.72 / air core ] in a position which is different 90 degrees in a peripheral direction. By energizing in this air core coil 73.74, magnetic flux occurs in the diameter direction which intersects perpendicularly with the direction of the magnetic flux which occurs with the above-mentioned air core coil 71.72. External magnetism generator 11 generates a magnetic field which generates magnetism between energized air core coils 71~74. In this example, if exchange current is added to the above-mentioned air core coil 71~74, insert portion 8 will vibrate to a diameter direction by an interaction with the regular magnetic field by external magnetism generator 11. By this vibration, stillness friction between insert portion 8 and a sample decreases, and insertion of insert portion 8 becomes easier. Insert portion 8 can be guided for [ vertical and horizontal ] all directions by adding direct-current current to the above-mentioned air core coil 71~74 alternatively. Composition 1 other operations and effects are the same as the 1st example. Drawings 9 thru/or 10 are applied to the 4th example of the present invention, and the explanatory view in which Drawing 9 shows the important section of an endoscope apparatus, the circuit diagram showing the circuit where Drawing 10 controls the energization to an air core coil, and Drawing 11 are explanatory views for explaining operation of this example. As shown in Drawing 9, in this example, three air core coils 81 and 82.83 are provided in a different position in the direction of an axis of the peripheral part of insert portion 8 of endoscope 2. Magnetic fluid balloon 84 is attached to the peripheral part of insert portion 8 so that these coils 81 and 82.83 may be covered. Magnetic fluid tank 87 formed out of endoscope 2 is connected to this magnetic fluid balloon 84 via tube 85 inserted in in the inside of insert portion 8, and pump 86 is infixed in the above-mentioned tube 85. And it can be filled up now with the magnetic fluid stored by magnetic fluid tank 87 in magnetic fluid balloon 84 with the above-mentioned pump 86. As shown in Drawing 10, the end of the above-mentioned air core coil 81*82.83 is connected to fixed contacts 89b, 89c, and 89d of change switch 89, respectively. Traveling contact 89a of the above-mentioned change switch 89 is connected to the anode of direct-current power supply 88, and the cathode of this power supply 88 is connected to the other end of air core coils 81 and 82.83. Therefore, it can energize now alternatively in air core coil 81.82.83 by turning off and replacing the above-mentioned change switch 89. Magnetism generator 11 is not formed in this example. Other composition is the same as that of the 1st example. Next, the operation of this example is explained. Insert portion 8 is inserted into a sample, and it is filled up with a magnetic fluid in magnetic fluid balloon 84. And traveling contact 89a of change switch 89 is cyclically connected in order of fixed contacts 89b, 89c, 89d, and 89b and -=. Then, air core coil 81 and 82*83 generate a magnetic field in order in this turn. In order that magnetic fluids may gather for the circumference of the air core coil which generated the magnetic field, magnetic fluid balloon 84 swells. Therefore, as shown in Drawing 11, the circumference of coil 81 swells first, then the circumference of coil 82 swells, and then as for the above-mentioned balloon 84, the circumference of coil 83 swells. By repeating this operation, balloon 84 in contact with the inner wall of a sample wriggles, and insert portion 8 is automatically inserted in the back in a sample. Thus, according to this example, without using external magnetism generator 11, it can see among them and can insert insert portion 8 of M2 automatically. Drawing 12 is an explanatory view showing the capsule type endoscope in the 5th example of the present invention, and its control device. It sees in a capsule type and M150 has cylindrical main part 151 of a capsule in which the front end part and the rear end part were formed in the shape of a surface of a sphere. An observation door is provided in the central part of the front end side of this main part 151 of a capsule, and object lens 152 is provided inside this observation door. CCD153 is provided in the image focus location of this object lens 152. The circumference of the above-mentioned observation door is provided with a plurality of lighting windows, and LED154 is provided inside each lighting window. In the back end side in the above-mentioned main part 151 of a capsule, Drive circuit 156 which drives the above-mentioned CCD 153 and LED154, Transmission and reception section 157 which performs transmission and reception of the output signal of above-mentioned COD 153 or various kinds of command signals between control devices 160 arranged out of a sample, and power supply section 158 which has a battery which supplies electric power to each component of capsule type endoscope 150 are provided. Air core coil 159 is provided in the perimeter side in the above-mentioned main part 151 of a capsule. The above-mentioned control device 160 is between transmission and reception sections 157 of the above-mentioned capsule type endoscope 150, With radio or a cable, transmission and reception section 161 which transmits and receives a signal, and pre-delivery receiving part 161,157 are passed, It has control means 162 which sends various kinds of command signals to capsule type endoscope 150, and signal-processing circuit 163 which carries out signal processing of the output signal of CCD153 inputted via the above-mentioned transmission and reception section 161, and it changes into a picture signal. And the picture signal from the above-mentioned signal-processing circuit 163 is inputted into TV monitor 7, and the photographic subject image picturized with capsule type endoscope 150 on this TV monitor 7 is displayed. Although not illustrated, the same magnetism generator 11 as the 1st example is formed in the circumference of the sample. While energizing in air core coil 159 and generating a magnetic field from this air core coil 159 like the 1st example in this example, A magnetic field is generated from magnetism generator 11, magnetism is generated between this magnetism generator 11 and air core coil 159 of capsule type endoscope 150, magnetism generator 11 is moved to it, and capsule type endoscope 150 is guided. It is i of the above-mentioned object lens 152 and CCD153.LED154 grade in main part 151 of a capsule! It replaces with an element required for Police, sensors, such as pH sensor and a temperature sensor, are formed, and it may be made to detect pH in the stomach, pH in intestines, temperature, etc. The extraction means and drug administration means for extracting intestinal juice etc. may be established in main part 151 of a capsule. Composition 1 other operations and effects are the same as the 1st example. The present invention is applicable to an endoscope also at a Limited catheter. The present invention is applicable also to the electronic endoscope which provided the solid-state image sensing device in the tip part of the insert portion. By the way, when guiding an insert portion magnetically by the magnetism generating part which provided permanent magnet 1 ferromagnetic or the electromagnet in the tip part of the insert portion of the above-mentioned electronic endoscope, and was provided in the outside of the body and a high magnetic field is generated by a magnetism generating part, the endoscopic image obtained by an electronic endoscope may be confused. Then, six examples of the endoscope apparatus which enabled it to guide an insert portion magnetically are shown below, without disturbing an endoscopic image. The explanatory view in which Drawings 13 thru/or 16 are applied to the 1st example, and Drawing 13 shows the whole endoscope apparatus, the block diagram in which Drawing 14 shows the composition of an endoscope apparatus, the block diagram in which Drawing 15 shows the composition of a process circuit, and Drawing 16 are explanatory views for explaining operation of this example. As shown in Drawing 13, endoscope apparatus 201 is, Electronic endoscope 202 and video processor 203 which the illumination light is supplied to this electronic endoscope 202, and performs signal processing to this electronic endoscope 202, It has magnetism generator 11 allocated under A bed 10 on which TV monitor 7 which inputs the picture signal outputted from the above-mentioned video processor 203, and displays a photographic subject image, and patient 9 in whom insert portion 8 of the above-mentioned endoscope 202 is inserted are placed. The above-mentioned magnetism generator 11 has magnetism generating part 231 which consists of electromagnets, and movement of this magnetism generating part 231 is attained in the level surface. The above-mentioned electronic endoscope 202 is provided with insert portion 8 of the thin length who has flexibility, final controlling element 13 formed successively by the back end of this insert portion 8, and universal code 204 installed from the flank of this final controlling element 13. Connector 205 connected to connector receptacle 209 of the above-mentioned video processor 203 enabling free attachment and detachment is provided in the end of above-mentioned universal code 204. As shown in Drawing 14, solid-state image sensing device, for example, CCD, 206 is allocated in the image focus location of object lens 24 established in the tip part of the above-mentioned insert portion 8. Cable 207 for signal transmission connected to this CCD206 is inserted in in the inside of insert portion 8. final controlling element 13 and universal code 204, and is connected to the above-mentioned connector 205. The incident end part of light guide 16 is also connected to the above-mentioned connector 205. Ferromagnetic 208 is attached to the peripheral part of bent side 21 of the above-mentioned insert portion 8. In the above-mentioned video processor 203, light source part 212 which has lamp 213 and lens 214 is provided, it is condensed with lens 214 and the illumination light emitted from the above-mentioned lamp 213 enters into the incidence end of the above-mentioned light guide 16. In the above-mentioned video processor 203, the Tulloch generator 217, and drive circuit 218, process circuit 221, magnetism drive circuit 224 and controller 225 into which the clock generated from this clock generation machine 217 is inputted are formed. The clock signal which occurred with the above-mentioned clock generation machine 217 is inputted into drive circuit 218, and this drive circuit 218 generates a CCD drive signal. This drive circuit 218 has reset and level transmission pulse generator 219, and perpendicular transmission pulse generator 220, and generator 219.220 generates reset pulse (electric charge) phiR1 level transmission pulse phiH and perpendicular transmission pulse phiV, respectively. Above-mentioned perpendicular transmission pulse phiV, electric charge reset pulse phiR, and level transmission pulse phiH are impressed to CCD206 through cable 207 for signal transmission. If the drive signal from the above-mentioned drive circuit 218 is impressed, CCD206 will output signal S which carried out photoelectric conversion, and this signal S will be inputted into process circuit 221 through cable 206 for signal transmission. The above-mentioned process circuit 221 takes in signal S outputted from CCD206, and outputs a picture signal to TV monitor 7. This process time H221 should be shown in 15 figure. Signal-processing figure B232 which carries out signal processing of the output signal of CCD 206, and it changes into a picture signal, A/D converter 233 which changes the picture signal from this signal-processing circuit 232 into a digital signal, Field memory 234 which memorizes the output signal of this A/D converter 233, It has D/A converter 235 which changes into an analog signal the signal read from this field memory 234, and it outputs to TV monitor 7, VTR which is not illustrated, etc., and, as for the above-mentioned field memory 234, writing and read-out are controlled by controller 225. The above-mentioned magnetism drive circuit 224 drives magnetism generating part 231 of magnetism generator 11. By generating a magnetic field from the above-mentioned magnetism generating part 231, magnetism (for example, power of absorption) occurs between this magnetism generating part 231 and ferromagnetic 208 provided in insert portion 8, and it becomes possible to guide insert portion 8 magnetically by this magnetism. In this example, as field memory 234 and magnetism drive circuit 224 in process circuit 221 are controlled by controller 225 and it is shown in Drawing 16 by it, a picture signal is obtained every other field, and it displays on TV monitor 7, or records on VTR etc. And he generates a magnetic field and is trying to guide to insert portion 8 magnetically from magnetism generating part 231 in the field which does not obtain a picture signal. In the field which does not obtain a picture signal, the picture of the field before field memory 234 memorizes is read once again. Thus, since the timing which obtains an endoscopic image, and the timing guided magnetically have been independent completely according to this example, insert portion 8 can be guided magnetically, without confusing an endoscopic image by a magnetic field. An air core coil may be provided in insert portion 8 like the 1st example instead of ferromagnetic 208. Composition 1 operation and effect of others of this example are the same as the 1st example. Drawing 17 is an explanatory view for explaining operation of the 2nd example. This example differs only in field memory 234 by controller 225, and control of magnetism drive figure 8224 from the 1st example. Drawing 17 shows the synchronized signal of the picture signal, i.e., Vertical Synchronizing signal VS and level Open J To 1 signal H3. As shown in this figure, in this example, an image is obtained and recorded [ display and ] in each fields of all. And it is made to perform magnetic Induction in a perpendicular blanking period (Vertical Synchronizing signal period). According to this example, insert portion 8 can be guided magnetically, without degrading image quality. Composition 1 other operations and effects are the same as that of the 1st example. Drawing 18 is an explanatory view for explaining operation of the 3rd example. This example switches operation of controller 225 with the switch etc. which are not illustrated, It is made into the field mode which takes in a picture signal every other field like the 1st example at the time of magnetic guidance, the magnetic field for magnetic guidance is generated in the field which does not take in an image, and it is made to consider it as the frame [ which does not perform magnetic induction ] mode from which an image is usually obtained in all the fields at the time. According to this example, at the time of magnetic guidance, since high definition is not required, it can make it field mode, and at the time of observation, it can usually be used in frame mode so that high definition may be obtained. Composition 2 other operations and effects are the same as that of the 1st example. Drawing 19 is an explanatory view for explaining operation of the 4th example. At the time of magnetic guidance, this example is a constant interval, performs freezing (still-picture-izing) of a picture, and release of freezing by turns, and is made to perform magnetic guidance by field memory 234 at the time of freezing. Therefore, at the time of magnetic guidance, the freezing picture which is not disturbed by the magnetic field is displayed on TV monitor 7. According to this example, magnetic guidance can be performed efficiently. Composition 1 other operations and effects are the same as that of the 1st example. The perspective view in which Drawings 20 and 21 are applied to the 5th example, and Drawing 20 shows the whole endoscope apparatus, the explanatory view in which Drawing 21 (a) shows the composition of a magnetism generator, and Drawing 21 (b) are A-A-line sectional views of The 21st figure <a. the 1st example is what is going to guide insert portion 8 in two dimensions -- oh, as for this example, guidance of To is attained in three dimensions. In this example, as shown in Drawing 20, circular magnetism generator 261 surrounding patient 9 focusing on patient 9 is formed instead of magnetism generator 11 in the 1st example. This magnetism generator 261 is movable to the longitudinal direction of A bed 10 in which patient 9 was laid about rail 262 top. The base of insert portion 242 of an endoscope is connected to observation unit 243 which built in video processor 203 in this example. This observation unit 243 is connected to final controlling element 245 which has a control circuit which controls the above-mentioned magnetism generator 261 via cable 244. The above-mentioned magnetism generator 261 is also connected to the above-mentioned final controlling element 245 via cable 240. Endoscopic image monitor 248, patient data indicator 263, and guidance switch 264 connected to the control circuit which performs control of magnetism generator 261 are formed in the above-mentioned final controlling element 245. As shown in Drawing 21, the above-mentioned magnetism generator 261 has ring part 265, and ring shape guide ring 267 is provided in this ring part 265. On this guide ring 267, a plurality of magnetism generating part 266A~266P are arranged along with a peripheral direction, and a magnetic field can be alternatively generated now from arbitrary magnetism generating parts by operation of guidance switch 264 of the above-mentioned final controlling element 245. Drawing 21 shows the state where the above-mentioned insert portion 242 was inserted into large intestine 241. In this example, insert portion 242 can be moved in the up-and-down direction by choosing magnetism generating part 266A and 266■, for example, and adjusting suitably the intensity of the magnetism by each magnetism generating part 266A and 2661. By choosing magnetism generating part 266P, 266A266B, and each class of magnetism generating part 266H-2661 and 266J, and, for example, generating magnetism from these, a magnetic field more powerful than one magnetism generator is obtained, and the stable guidance operation of it is attained. for example, wide range movement of insert portion 8 is attained magnetism generating part 266A and by [ which are boiled 266G266 ] choosing three like and generating magnetism from these. In addition, it can do [ guiding insert portion 242 in various modes with various combination of magnetism generating part 266A~266P, or ]. The timing of generating of the magnetic field from magnetism generating part 266A~266P in this example is the same as that of the 1st thru/or the 4th example. If 0 he is trying to display the direction of the magnetism which occurs with magnetism generator 261, for example, the direction of magnetism, is above, as shown in Drawing 20, a message called rUPJ will be displayed on endoscopic image monitor 428. Composition 8 other operations and effects are the same as that of the 1st thru/or the 4th example. The explanatory view and Drawing 23 (b) showing an index in case the sectional view and Drawing 23 (a) in which Drawings 22 and 23 are applied to the 6th example, and Drawing 22 shows the tip part of the insert portion of an endoscope do not generate an external magnetic field are an explanatory view showing an index when generating an external magnetic field. Insert portion 8 of the endoscope of this example constitutes instead at least 1 side of hood 20 attached to tip constituting part 19 and this tip constituting part 19 from a ferromagnetic, without providing air core coil 41.42 to insert portion 8 in the 1st example. And he is trying to guide insert portion 8 by the magnetism which arises between this ferromagnetic and an external magnetism generator. In this example, index device 270 is formed in the front of object lens 24 established in the tip part of the above-mentioned insert portion 8. This index device 270 has ring 271 of the hollow formed by a transparent glass tube or tube as shown in Drawing 23, and magnetic fluid 272, and this magnetic fluid 272 and the good transparent fluid of dispersibility with equal specific gravity are enclosed in this ring 271. The above-mentioned magnetic fluid 272 is observed with object lens 24. Within a uniform magnetic field, as shown in Drawing 23 (a), magnetic fluid 272 is distributed uniformly, and when the magnetic field for magnetic guidance is generated from the exterior, as shown in Drawing 23 (b), magnetic fluid 272 inclines toward one side. Therefore, the direction of a magnetic field can be known in an endoscopic image. Composition 1 other operations and effects are the same as that of the 1st thru/or the 4th example. It may be made to separate the timing which guides magnetically the timing which obtains a picture signal like the 1st [ above-mentioned ] thru/or the 4th example using what provided the ferromagnetic instead of and this capsule type endoscope in the capsule type endoscope shown in Drawing 12. [ air core coil 159 ]

[Effect of the Invention] As explained above, in order to guide an insert portion, in the present invention, an air core coil which generates a magnetic field by energization was used as a magnetic field generating means provided in this insert portion. Therefore, guidance control becomes possible by control of current energized in an air core coil, and its guidance control nature improves, and since an air core coil will become nonmagnetic and will not generate heat if energization to an air core coil is stopped, it is effective in safety improving.

[Brief Description of the Drawings]

It is an explanatory view in which Drawings 1 thru/or 4 are applied to the 1st example of the present invention, and Drawing 1 shows the important section of an endoscope apparatus, Drawings 3 are a perspective view in which Drawing 2 shows the whole endoscope apparatus, and a sectional view showing the tip part of the insert portion of an endoscope, The explanatory view and Drawings 5 or 7 in which Drawing 4 shows the important section of the endoscope apparatus of the modification of this example is applied to the 2nd example of the present invention, In Drawings 6, Drawing 5 is an explanatory view showing the important section of an endoscope apparatus, and a circuit diagram showing the composition of the control device in the modification of this example, Drawing 7 is a wave form chart showing the current energized in an air core coil in a modification, Drawing 8 is an explanatory view showing the important section of the endoscope apparatus in the 3rd example of the present invention, It is an explanatory view in which Drawings 9 thru/or 10 are applied to the 4th example of the present invention, and Drawing 9 shows the important section of an endoscope apparatus, The circuit diagram and Drawing 11 showing the circuit where Drawing 10 controls the energization to an air core coil are explanatory views for explaining operation of this example, Drawing 12 is an explanatory view showing the capsule type endoscope in the 5th example of the present invention, and its control device, It is an explanatory view in which Drawings 13 thru/or 23 are applied to six examples of the endoscope apparatus which enabled it to guide an insert portion magnetically without disturbing an endoscopic image, Drawings 13 thru/or 16 are applied to the 1st example, and Drawing 13 shows the whole endoscope apparatus, Drawings 15 are a block diagram in which Drawing 14 shows the composition of an endoscope apparatus, and a block diagram showing the composition of a process circuit, Drawings 17 are an explanatory view for Drawing 16 to illustrate operation of this example, and an explanatory view for explaining operation of the 2nd example, Drawings 19 are an explanatory view for Drawing 18 to illustrate operation of the 3rd example, and an explanatory view for explaining operation of the 4th example, It is a perspective view in which Drawings 20 and 21 are applied to the 5th example, and Drawing 20 shows the whole endoscope apparatus, In the explanatory view and Drawing 21 (b) showing the composition of a magnetism generator, Drawing 21 (a) is A-A-line sectional views of Drawing 21 (a), They are a sectional view in which Drawings 22 and 23 are applied to the 6th example, and Drawing 22 shows the tip part of the insert portion of an endoscope, and Drawing 23 (the explanatory view and Drawing 23 (b) showing an index in case a> does not generate an external magnetic field are an explanatory view showing an index when generating an external magnetic field.). 1 .. Endoscope apparatus 2 ... Endoscope 8 and insert portion 11 ... Magnetism generator 41.42 ... Air core coil Drawing 4 Drawing 5 The 6th Drawing 7 Mouth The 9th Figure Drawing 10 Drawing 11 Drawing 13 Drawing 15 z Drawing 12 Drawing 16 A fields B fields A7 (- Rudo) B fields Drawing 17 Drawing 18 Drawing 19