JP3973631B2 - Endoscope - Google Patents

Description

  The present invention relates to an endoscope in which the hardness of an insertion portion can be variably adjusted.

For example, in an endoscope that is inserted into the large intestine, the insertion part is passed through a bent sigmoid colon or the like, so that the insertion part is considerably soft. However, after the distal end of the insertion section passes through the sigmoid colon (when the distal end reaches the splenic curve), the sigmoid colon is straightened and the insertion section is hardened to be inserted deeper while maintaining its state. Sometimes you want to be hard. In order to cope with this, for example, Patent Literature 1 discloses that the coil pipe is compressed by pulling the wire inserted into the coil pipe disposed in the insertion portion by lever operation at the hand side operation portion. Proposals have been made to increase the hardness.
Japanese Utility Model Publication No. 3-43802

  Since the coil pipe for hardening the insertion portion is provided separately from the other built-in objects, the insertion portion becomes thicker than the case where there is no coil pipe. In particular, when it is desired to increase the degree of hardening, it is necessary to increase the diameter of the coil pipe. In this case, the insertion portion also increases in diameter.

(Object of invention)
An object of the present invention is to provide an endoscope that can efficiently reduce the installation space for the flexible variable member, prevent the insertion portion from becoming thick as much as possible, and change the hardness of the insertion portion. .

The invention according to claim 1 is provided with an insertion portion having a soft cylindrical body, a proximal side of the insertion portion , an operation knob, and the insertion portion with respect to the insertion portion in accordance with an operation by the operation knob. wherein a shall be used in the long axial on the operation unit and a moving member which is advanced and retracted along, other than the ability to adjust based on the flexibility of the front Symbol insertion portion to the operator of the operation application A built-in object that is inserted through the cylindrical body, is coaxially fitted to the built-in object , is connected to the moving member, and is compressed and deformed in the axial direction in accordance with the advancement and retraction of the moving member. A tubular flexible variable member whose own flexibility is adjusted, and when the flexibility of the insertion portion needs to be adjusted , the movable member is advanced and retracted by operation of the operation knob. and, of the insertion portion to adjust the flexibility of the flexible variable member in accordance with this An endoscope being characterized in that to be able to appropriately adjust FLEXIBLE.

  The invention according to claim 2 is the endoscope according to claim 1, wherein the flexible variable member is a coil pipe fitted into the built-in object.

The invention according to claim 3 is characterized in that a rack as the moving member is attached to a proximal end portion of the coil pipe, and the rack can be advanced and retracted by rotating a pinion provided in the operation portion. The endoscope according to claim 2.

The invention according to claim 4, wherein the internals are endoscopic according to claim 1, claim 2 or claim 3, characterized in that the bending operation wire and wire insertion for inserting the bending operation wire It is a mirror.

The invention according to claim 5 is the endoscope according to claim 1 , 2 or 3 , wherein the built-in object is a pipe through which a fluid flows.

The invention according to claim 6, wherein the internals are Claim 1 which is a member of an optical system, an endoscope according to claim 2 or claim 3.

The invention according to claim 7 is the endoscope according to claim 1, 2, or 3, wherein the built-in object is a member of an optical system.
The invention according to claim 8, wherein the optical system member is an endoscope according to claim 7, characterized in that the glass fiber.

  According to the present invention, by providing a flexible variable member (variable adjustment member) coaxially with at least one of the built-in objects arranged in the soft cylindrical body of the insertion portion, the insertion portion is flexible in a space efficient manner. A variable property member is housed to prevent the insertion portion from becoming thicker as much as possible.

< First form >
The first embodiment will be described with reference to FIGS.
(Constitution)
FIG. 1 shows an internal structure of an electronic endoscope 2 in the endoscope apparatus 1, and FIG. 2 shows a system of the endoscope apparatus 1. The endoscope apparatus 1 includes an endoscope 2, a control device 3 having a light source unit that supplies illumination light to the endoscope 2, and a signal processing unit that performs signal processing on an image signal sent from the endoscope 2. And a monitor 4 for displaying a video signal output from the control device 3 on the screen.

  The electronic endoscope 2 includes an elongated flexible insertion portion 6, a large-diameter operation portion 7 connected to the rear end side of the insertion portion 6, and a universal cable extending from the side portion of the operation portion 7. 8 and.

  The insertion portion 6 is provided with a rigid distal end portion 9 located on the distal end side, and a bendable bending portion 11 is provided on the rear side adjacent to the distal end portion 9. Further, a flexible portion 12 having a flexible and flexible cylindrical body is continuously provided behind the curved portion 11. The bending portion 11 is configured to bend in both the up / down / left / right directions by operating a bending operation knob 13 provided in the operation portion 7.

  A connector 14 for connecting the universal cable 8 to the control device 3 is provided at the extending end of the universal cable 8. The monitor 4 is connected to the control device 3 by a signal cable 16.

  As shown in FIG. 1, the distal end portion 9 of the insertion portion 6 is provided with a distal end portion main body 17 formed of a hard material in a substantially cylindrical shape, and the distal end portion main body 17 has a longitudinal length of the insertion portion 6. A forceps channel through hole 18 and an observation through hole 19 are provided in parallel to the direction. The forceps channel through-hole 18 incorporates a connection tube 21, and a flexible portion for forming a forceps channel 22 at the rear portion of the connection tube 21 protruding rearward from the distal end body 17. The tip of the tube 23 is connected. The forceps channel tube 23 is inserted into the insertion portion 6, and a rear end portion thereof is led into the operation portion 7 and connected to a forceps port 24 provided in the operation portion 7.

  An objective lens system 26 is provided in front of the observation through-hole 19, and a solid-state image sensor 27 is provided at the imaging position of the objective lens system 26. A signal line 28 capable of transmitting an image signal is connected to the solid-state image sensor 27. The signal line 28 is inserted into the insertion portion 6 and provided in the connector 14 through the operation portion 7 and the universal cable 8. Connected to the contact 29.

  The connector 14 is provided with a light guide connector 32 that allows illumination light emitted from a light source (not shown) to enter the end of the light guide 31. The light guide 31 passes through each of the universal cable 8, the operation unit 7, and the insertion unit 6, and the tip portion thereof is inserted into a light guide through hole (not shown) provided in the tip body 17. Illumination light can be irradiated to the observation site of the operative field.

  A plurality of substantially annular joint pieces 33 are rotatably arranged in the bending portion 11 and arranged in the longitudinal direction of the insertion portion 6. The most advanced joint piece 33 of the joint pieces 33 is a tip portion. The body 17 is fixed by being fitted around the rear end. A distal end portion of an annular connecting tube 34 provided at the distal end of the flexible portion 12 is fitted and fixed to the joint piece 33 at the rearmost end of the plurality of joint pieces 33. Further, the connecting pipe 34 supports the tip of an angle wire guide 36 (not shown in FIG. 1) connected to the rear end of the tip body 17 and formed by a metal coil pipe. 1, an angle wire 37 (not shown in FIG. 1) such as a flexible twisted wire operated by the bending operation knob 13 is inserted and supported so that it can be pulled and loosened. The bending portion 11 is bent so that the front end portion 9 can be directed in the up / down / left / right directions. The bending portion 11 is covered with a soft outer jacket 65.

By the way, the insertion section 6 is provided with a flexible adjustment mechanism (means) described below so that it can be easily inserted into a bent body cavity such as a deep portion of the large intestine.
In the soft portion 12 of the insertion portion 6, a metal coil pipe 39 and a flexible adjustment wire 41 inserted through the inner hole are provided as a flexible variable member as a flexibility adjusting means. is there. The tip of the coil pipe 39 is brazed and fixed to the inner wall of the connection pipe 34 connecting the front end of the flexible portion 12 and the rear end of the bending portion 11 with a braze 42. Furthermore, the tip of the flexibility adjusting wire 41 is also fixed to the tip of the coil pipe 39 or the connecting pipe 34 by the wax 42.

  Further, as shown in FIG. 1, the middle portion of the coil pipe 39 on the rear end side is connected to the inner peripheral surface of the connection base 43 that connects the rear end of the flexible portion 12 and the front end of the operation portion 7 with a braze 42. It is fixed by brazing. Here, as shown in FIG. 1, the rear end of the coil pipe 39 extends to the inner side of the operation portion 7 behind the brazing fixing portion.

  The flexible variable member as the flexibility adjusting means is arranged such that at least the middle part thereof is movable in the circumferential direction except for the front and rear end parts in the soft part 12. Generally speaking, the flexible variable member has a plurality of built-in objects inserted into the cylindrical body, and one of the built-in objects can change its flexibility and move in the peripheral direction by an operation on the hand side. is there.

  On the other hand, the flexibility adjusting wire 41 housed in the coil pipe 39 is connected at its rear end to one end of the link member 45 in the operation portion 7. As shown in FIG. 3, one end of another link 46 is connected to the other end of the link member 45. As shown in FIG. 4, the other end of another link 46 is connected to a later-described advance / retreat operation mechanism on the lever 47 side for performing a flexibility adjustment operation as described later.

One end of the lever 47 is formed as a disc-shaped base end portion 48, and the top of the other end is formed as a finger holding portion 49. The lever 47 is pivotally attached by pivotally attaching the center of the base end portion 48 to the frame of the operation portion 7 by a pivotal support portion 50 such as a rivet.
A link connecting member 52 is attached to the outer periphery of the base end portion 48. The link connecting member 52 is attached to the tip end of the link 46 so as to be rotatable around the pivot portion 51.

  Therefore, the lever 47 can be rotated from the state indicated by the two-dot chain line in FIG. 4 to the position indicated by the solid line by operating around the pivotal support portion 50 so as to draw the finger holder 49. By this rotation operation, the link 46 can be moved to the operation unit 7 side in the substantially longitudinal direction of the insertion unit 6, tension is applied to the flexibility adjusting wire 41, the connection tube 34 is pulled toward the operation unit 7 side, and the coil The pipe 39 is also set in a state close to tight winding.

  Therefore, the flexibility adjusting wire 41 can maintain the tension, generate a reaction force in the direction in which the flexible portion 12 is bent, and increase the rigidity of the flexible portion 12. That is, the rigidity of the flexible portion 12 can be varied by the amount of rotation of the lever 47.

  The pivot portion 50 of the lever 47 is substantially the same as the center of rotation of the bending operation knob 13, and the lever 47 is located near the bending operation knob 13 and operates the bending operation knob 13, as shown in FIG. Similarly to the above, the lever 47 can be rotated by a simple operation.

  The tip portion of the coil pipe 39 does not necessarily have to be fixed to the inner wall of the connection pipe 34 or the like. In such a case, the coil pipe 39 may slightly fluctuate inside the insertion portion 6, but when the wire 41 is pulled, it is not necessary to pull only the coil pipe 39 and the connection pipe 34. There is an advantage that the ability can be reduced.

  Next, a built-in structure of the flexible portion 12 in the insertion portion 6 of the endoscope 2 will be described. There can be various types as shown in FIGS. 5A, 5B, and 5C.

  In general, in addition to the above-described built-in member, an air supply tube 61, a water supply tube 62, and upper, lower, left and right angle wires 37 are inserted into the cylindrical body 60 of the insertion portion 6, and coiled angle wires are inserted and guided. A guide 36 is inserted. The signal line 28 is composed of a plurality of shield lines 63 and is bundled by providing a binding resin layer 64 on the exterior thereof.

  The light guide 31 is bundled by a bundling tube 59 such as silicon rubber or foaming tetrafluoroethylene resin. In addition, the forceps channel tube 23 described above, the coil pipe 39 serving as the flexibility adjusting means, and the flexibility adjusting wire 41 inserted therethrough are inserted into the cylindrical body 60 in an appropriate arrangement.

  In FIG. 5, the cylindrical body 60 of the insertion portion 6 is drawn with a single layer. However, as shown in FIG. 1, for example, the outer casing 58 and the inner cylindrical body 57 are actually often composed of multiple layers. . The jacket 58 is made of a synthetic resin. The inner cylinder 57 may be a metal tube, a knitted tube knitted with a metal wire and a synthetic resin function, or a spiral tube in which a metal plate is spirally wound on the inner layer thereof. The spiral tube may be multiplexed by changing the winding direction.

A feature of this embodiment is that a protective cylinder (tubular body) that surrounds another built-in member in order to protect the coil pipe 39 through which the flexible adjustment wire 41 is inserted, which is a flexible variable member of the flexible adjustment means. ) 56, which is used as a partition member. In the case of FIG. 5A, the protective cylinder 56 surrounds the two light guides 31 that are optical system members made of glass fibers that are non-metallic materials and the signal line 28 that includes non-metallic materials, Both of them were partitioned into a space different from the space where the coil pipe 39 and the wire 41 of the flexibility adjusting means are located.

  In the case of FIG. 5B, the forceps channel tube 23, the air supply tube 61, the water supply tube 62, 2, which is a non-metallic material whose protective cylinder 56 is a member other than the light guide 31 and the signal line 28. The angle wire guide 36 and the angle wire 37 of the book are also enclosed.

  In the case of FIG. 5C, a plurality of protective cylinders 56 a and 56 b are provided, and the protective cylinders 56 a and 56 b surround the light guide 31. Of course, as a protection form by the protection cylinder 56 in the present invention, various variations other than the forms in FIGS. 5A to 5C are conceivable.

  Specific examples of the protective cylinder 56 include those shown in FIGS. FIGS. 5A to 5C show a form in which the protective cylinder 56 (including 56a and 56b) is viewed obliquely from the side. First, the protective cylinder 56 in FIG. 6A is a tube having a substantially circular cross section. As this tube, for example, a resin tube such as a foaming tetrafluoroethylene resin or a rubber-based resin, or a tube in which such a material is stacked in a plurality of layers may be used.

  In FIG. 6B, since the protective cylinder 56 surrounds only the two light guides 31 with the protective cylinder 56, the protective cylinder 56 has a non-circular shape such as a substantially oval shape or an oval cross section. It extends in a direction perpendicular to the axial direction.

  The protective cylinder 56 in FIG. 6C is a coiled cylinder formed by, for example, spirally winding a metal plate. The material may be a hard resin instead of a metal, but in any case, it becomes a cylindrical body that is less likely to be crushed in the radial direction than in the case of FIG. Further, the protective cylinder 56 may be a coil made of a metal wire having a round cross section or a tightly wound shape.

  The protective cylinder 56 in FIG. 6 (d) constitutes the protective cylinder 56 by metal thin wires or a knitted pipe knitted with metal thin wires and synthetic resin fibers. Alternatively, a metal tube or a synthetic resin fiber embedded in a resin tube may be used. Each of the structures has a structure that is less likely to be crushed than that of FIG.

  The range in which these protective cylinders 56 are provided is a portion where the coil pipe 39 of the flexibility adjusting means disposed in the soft portion 12 exerts a hardening action. Therefore, if the tip of the coil pipe 39 is halfway through the soft portion 12, the protective cylinder 56 may be provided in the soft portion 12 on the hand side. Of course, the full length of the soft part 12 may be sufficient.

  Further, the flexible variable member of the flexibility adjusting means is not a combination of the tubular coil pipe 39 and the wire 41 as described above. For example, the flexible pipe is a resin tube that softens the coil pipe 39 by heating. However, it may be a member for adjusting flexibility by combining it with a heating means (heater), and may be any elongated built-in object that can adjust flexibility.

(Function)
The operation of the endoscope apparatus 1 of this form will be described as a case where it is inserted into the large intestine transanally.

  First, the bending operation knob 13 is operated to insert the insertion portion 6 of the endoscope 2 into the large intestine, and the distal end portion 9 of the insertion portion 6 moves from the descending colon 93 as shown in FIG. After reaching the splenic curve 94, the insertion portion 6 is twisted while pulling the flexible portion 12 to bring the intestine and the insertion portion 6 into a straight state as shown in FIG. 7B. Thereafter, when an attempt is made to insert it into the transverse colon 95, the vicinity of the sigmoid colon 92 tries to return to the bent state. Here, by turning the lever 47, the flexible adjustment wire 41 of the flexible adjustment means. The coil pipe 39 is hardened. Thereby, the rigidity of the soft part 12 can be increased as described above, and the soft part 12 of the insertion part 6 can be prevented from returning to the bent state. Therefore, the distal end side of the insertion portion 6 can be bent and insertion into the transverse colon 95 side can be performed smoothly.

  Further, by passing through the transverse colon 95 with the rigidity of the soft portion 12 increased, the deflection of the transverse colon 95 is released as shown in FIG. Can be inserted into the cecum 98.

According to this embodiment , since the adjustment operation lever 47 is provided so as to be at substantially the same rotation center position as the bending operation knob 13, an assistant such as when a flexible adjustment member is provided separately is provided. Flexibility can be adjusted with a simple operation without the need. A biopsy can also be performed by inserting a biopsy forceps into the forceps channel 22.

  Here, when the flexible adjustment coil pipe 39 in the flexible portion 12 is hardened in a state where the flexible portion 12 of the insertion portion 6 is bent as shown in FIG. 7C, other built-in objects are compressed. . The light guide 31 made of glass fiber and an image guide (not shown) are particularly easily damaged by the compression. Since this embodiment is an example of an electronic endoscope, an image guide is not used. However, in the case of a fiber endoscope, the image guide may be surrounded by a protective cylinder 56.

  Specifically, in FIG. 5A, the light guide 31 and the signal line 28 are surrounded by the protection cylinder 56, and these are separated from the coil pipe 39 of the flexibility adjusting means. Is protected from the compression of the coil pipe 39. The light guide 31 is usually provided with a bundling tube 59 for bundling it, but this is the main function of bundling, and is very flexible and easily crushed. Not enough to protect. Even if the protective cylinder 56 is somewhat crushed by the compression of the coil pipe 39, there is a sufficient gap between the light guide 31 and the signal line 28, so that the compression force of the coil pipe 39 is absorbed and the light guide 31, The signal line 28 can be protected.

  Of course, the protective cylinder 56 may be made of a material that is hardly crushed by the compression of the coil pipe 39 (for example, metal). Since the signal line 28 is more resistant than the light guide 31, it may be arranged outside the protective cylinder 56 (see FIG. 6C). Further, in the case of a fiberscope instead of an electronic scope, it is necessary to dispose an image guide that is less resistant than the light guide 31 in the protective cylinder 56 instead of the signal line 28. The coil pipe 39 (and the wire 41) can move inside the cylindrical body 60 outside the protective cylinder 56. If the coil pipe 39 is fixed to a certain part (direction) of the cylindrical body 60, resistance is generated when the flexible portion 12 is bent, and the flexible portion 12 becomes hard to some extent before the coil pipe 39 is hardened. However, if the coil pipe 39 can move in the cylindrical body 60 as shown in FIGS. 5A to 5C, the flexible portion 12 can be made sufficiently soft and can easily pass through the sigmoid colon 92.

  5B, in addition to the light guide 31 and the signal line 28, the protective cylinder 56 surrounds the forceps channel tube 23, the air supply tube 61, the water supply tube 62, and the angle wire guide 36. Therefore, the angle wire guide 36 in the protective cylinder 56 that protects the buckling and crushing of the tubes does not need to be protected originally, but in order to make space efficiency effective, Two were placed inside the protective cylinder 56 and the others were placed outside.

  In FIG. 5C, since there is a sufficient gap between the protective cylinder 56a and the bundling tube 59, the compression force of the coil pipe 39 can be absorbed there even if the protective cylinder 56a is made of a material that is somewhat crushed. Since there is almost no gap between the protective cylinder 56b and the bundling tube 59, the protective cylinder 56b needs to be made of a material that is not easily crushed (metal, hard resin, thick resin). By individually enclosing the low-resistance built-in objects with the protective cylinders 56a and 56b, as shown in FIG. 5A, rather than enclosing a plurality of built-in objects with the circular protective cylinder 56. You can minimize wasted space.

(effect)
As described above, in this embodiment , even if the flexible portion 12 of the insertion portion 6 is bent and the coil pipe 39 which is a member for adjusting flexibility is hardened, the built-in object such as the light guide 31 can be used. The coil pipe 39 can be protected from pressure.

< Second form >
The second mode will be described with reference to FIGS.
(Constitution)
FIG. 8 shows a system of the endoscope apparatus 1. In the endoscope 2 in this form , an insertion port for inserting a long action portion 67 of a flexibility adjusting jig 66 (described later) shown in FIG. 9 in the vicinity of the forceps port 24 in the operation unit 7. 68 is provided. The insertion portion 6 of the endoscope 2 is provided with an insertion tube 69 communicating with the insertion port 68. The distal end side of the insertion tube 69 is disposed in the soft part 12 closer to the proximal side than the bending portion 11, and the distal end of the insertion tube 69 is closed. The internal structure of the flexible portion 12 in the insertion portion 6 of the endoscope 2 is the same as the example of FIGS. 5A to 5C as described above, and the peripheral position of the arrangement position of the coil pipe 39 in FIG. The insertion tube 69 is only disposed corresponding to the above. The structure of the other endoscope body is the same as that of the first embodiment described above.

  The flexibility adjusting jig 66 constitutes a flexible variable member. As shown in FIG. 9, the coil pipe 39 similar to that in the first embodiment and the wire 41 inserted through the coil pipe 39 are provided. It is equipped with. The tip of the wire 41 is fixed to the tip 70 of the coil pipe 39. The distal end 70 is formed in a round shape so that the insertion tube 69 of the endoscope 2 is not damaged. A support column 73 is inserted into the main body 72 of the operation unit 71 of the adjustment jig 66 so as to be able to advance and retreat. The proximal end of the wire 41 is connected to the support column 73. A spiral spiral groove 74 is provided on the outer peripheral wall portion of the main body 72. A pin 75 provided on the column 73 is fitted in the spiral groove 74. In addition, some (one or more) recesses 76 are provided in the middle of the spiral groove 74, and a pin 75 is fitted into an arbitrary recess 76 for engagement. Handles 77 and 78 are attached to the main body 72 and the column 73, respectively.

(Function)
When the flexibility adjusting jig 66 rotates the handle 78 with respect to the handle 77, the pin 75 moves along the spiral groove 74, the column 73 moves in the axial direction with respect to the main body 72, and the coil pipe 39 is moved. For example, the action portion 67 can be hardened by pulling the wire 41 and applying a compressive force to the coil pipe 39. The flexible portion 12 can be changed from a soft state to a hard state by performing the above-described operation after the action portion 67 of the flexibility adjusting jig 66 is inserted into the insertion tube 69. At that time, if the pin 75 is fitted and engaged with the recess 76, the state can be reliably maintained.

In this embodiment , the action portion 67 of the flexibility adjusting jig 66 can be appropriately moved in the axial direction within the insertion tube 69, so that the range and the portion of the flexible portion 12 of the insertion portion 6 to be hardened can be adjusted according to the user's preference. Can be adjusted in the direction. If there are a plurality of recesses 76, the pin 75 can be stopped there, and the flexibility can be changed in a plurality of stages.

(effect)
The site where the soft part 12 is hardened can be adjusted according to the user's preference, and the hardening level can be adjusted in a plurality of stages, so that the insertion into the large intestine can be improved according to the individual user.

(Modification)
The position at which the insertion opening 68 of the endoscope 2 is provided may be not the front of the forceps opening 24 but the rear thereof, or may be on the side of the operation unit 7. Furthermore, it may be behind the position of the bending operation knob 13. Further, the insertion through the insertion tube 69 is not limited to that shown in FIG. 9, but may be, for example, a metal or a hard resin wire (stylet). That is, the soft part before inserting a stylet can be hardened only by inserting a stylet, and a simple flexible adjustment means can be comprised.

< Third form >
A third embodiment according to the present invention will be described with reference to FIGS.
(Constitution)
FIG. 10 is a diagram schematically showing a main part inside the endoscope 2. FIG. 11 is a view showing the vicinity of the operation unit 7 of the endoscope 2. In FIG. 10, reference numeral 100 denotes a bending operation wire as one of the built-in members. Similar to the above-described embodiment , the distal end of the bending operation wire 100 is fixed to the distal end side portion of the bending portion 11 in the insertion portion 6. The proximal side of the bending operation wire 100 is connected to an advance / retreat operation mechanism (not shown) operated by the bending operation knob 13 of the operation unit 7 through another member (not shown). The bending operation wire 100 is advanced and retracted by the rotation of the bending operation knob 13.

  As shown in FIG. 10, the bending operation wire 100 inside the endoscope 2 is surrounded by a wire insertion tube 101, and the distal end of the wire insertion tube 101 is the proximal end of the bending portion 11 or the flexible portion 12. For example, it is fixedly attached to the tip of the wire with a solder 42. The proximal end of the wire insertion tube 101 is fixed to a stopper member 102 provided in the operation unit 7. The wire insertion tube 101 is made of, for example, a thin metal pipe (such as a stainless steel pipe).

  A coil pipe 103 is provided around the wire insertion tube 101, and the coil pipe 103 is installed so as to surround the wire insertion tube 101. The distal end of the coil pipe 103 is fixedly attached to the distal end of the wire insertion tube 101 by the brazing 42, for example. That is, the distal end of the coil pipe 103 is fixed to the proximal end of the bending portion 11 or the distal end of the flexible portion 12.

  A rack 104 is attached and fixed to the proximal end of the coil pipe 103. The rack 104 has a pinion 105 having projections and depressions matching the projections and depressions formed on the outer periphery thereof fitted and connected. The rack 104 can be advanced and retracted by rotating the pinion 105 by an operation on the operation unit 7. The pinion 105 is rotatably supported by a support column 106 provided in the operation unit 7. As shown in FIG. 11, an operation knob 107 disposed outside the operation unit 7 is connected to the support column 106, and the pinion 105 is rotated by the operation knob 107. As shown in FIG. 12, the operation portion 7 is provided with a protrusion 108 that locks the operation knob 107 so that the rotation of the operation knob 107 in the loosening direction can be stopped.

  As shown in FIG. 13, a protective cylinder 56 similar to that described in the first embodiment is provided in the flexible portion 12 of the insertion portion 6 of the endoscope 2, whereby the light guide 31 and the air supply The tube 61, the water supply tube 62, and the forceps channel tube 23 are surrounded. In addition, an angle wire 37 and an angle wire guide 36, a wire 100, a wire insertion tube 101, a coil pipe 103, and a signal line 28 are disposed outside the protective cylinder 56.

(Function)
The wire insertion tube 101 has the same role as the angle wire guide 36 of the first embodiment , and even if the wire 100 is advanced and retracted, the wire insertion tube 101 does not move and can be bent as in a normal endoscope. On the other hand, when the operation knob 107 is rotated, the pinion 105 is rotated and the rack 104 is advanced and retracted. Therefore, if the operation is performed so as to compress the coil pipe 103, the coil pipe 103 can be hardened, and the flexible portion of the insertion portion 6 can be made. 12 can be hardened or softened. When the coil pipe 103 is compressed, the operation knob 107 can be stopped by the protrusion 108 even if it is released from the operation knob 107 by hand. That is, as shown in FIG. 12, when the operation knob 107 passes the slope of the projection 108, it drops into the engagement surface of the projection 108 and is locked, and the operation knob 107 can be stopped at that position. When returning to the original position, the operation knob 108 is once moved toward the outside of the operation unit 7 so that it can be returned to the original position beyond the apex of the protrusion 108.

  The larger the diameter of the coil pipe 103, the greater the hardening effect. However, by providing it coaxially with the bending operation wire 100, the space in the cylindrical body 60 can be used effectively. In the example of FIG. 13, since the bending operation wire 100 and the wire insertion tube 101 are in the coil pipe 103, a space in which the coil pipe 103 can move in the cylindrical body 60 can be widened as compared with that provided separately.

  In the example of FIG. 13, a metal built-in object outside the protective cylinder 56 (when the signal line 28 is considered to be resistant because the inside is metal), the inside of the protective cylinder 56 is By arranging the non-metallic built-in material, the non-metallic built-in material which is considered to be weak against the compression of the coil pipe 103 is protected.

  The flexibility adjusting member does not necessarily depend on the coil pipe 103 and means for applying a compressive force thereto. For example, a resin tube that is softened by heat is provided instead of the coil pipe 103, and the wire insertion tube 101 serves as a heating means. Thus, the flexibility may be adjusted, or other technical means may be used.

  Furthermore, the flexibility adjusting member such as the coil pipe 103 is not limited to the outer periphery of the wire 100 and the insertion tube 101, and may be the outer periphery of the air supply, water supply, and suction pipes, or the light guide 31. Or the signal line 28 (or image guide). By doing so, the built-in object surrounded by the flexible adjustment member is no longer subjected to the pressure of the flexible adjustment member, and the built-in object can be protected.

(effect)
According to this embodiment, the flexible adjustment member can be installed in the cylindrical body 60 by effectively using the space in the insertion portion 6 in addition to the effects of the other embodiments described above.

  In addition, as a built-in thing enclosed by the said flexible adjustment member used as a flexible variable member, the pipe | tube which flows a fluid, the member of an optical system, or glass fiber may be sufficient.

[Appendix]
(1) An insertion portion having a soft cylindrical body, a plurality of built-in objects inserted through the cylindrical body, and the flexibility of one of the built-in objects is changed by the operation on the hand side and in the peripheral direction. In an endoscope provided with a movable flexible member,
An endoscope provided with a partition member installed in the cylindrical body and partitioning the flexible variable member and at least one other built-in object other than the flexible variable member.
(2) In the first item, the built-in material partitioned from the flexible variable member by the partition member is a non-metallic material.
(3) In the second item, the non-metallic material is a glass fiber.
(4) In the item 3, the glass fiber is a light guide.
(5) In the item 3, the glass fiber is an image guide.
(6) In the second item, the non-metallic material is a tube member.
(7) In the second item, the non-metallic material includes a signal line.
(8) In the first item, the partition member partitions a plurality of built-in objects.
(9) In the above eighth item, the partition member is an irregular shape adapted to a plurality of built-in object shapes.
(10) In the eighth item, the plurality of built-in objects are all optical members.
(11) In the eighth item, the built-in object includes a bending operation coil pipe.

(12) In the first aspect, the partition member partitions one built-in object.
(13) In the first item, the partition member is a resin tube.

(14) In the first item, the partition member is a spiral tube.
(15) In the first item, the partition member is a knitted tube.
(16) In the first item, the flexible variable member is capable of moving back and forth in the axial direction within the cylindrical body.
(17) In the fifteenth item, the flexible variable member includes a hard stylet and a pipe line through which the hard stylet is inserted.
(18) In the first item, the flexibility variable member can change its flexibility in a plurality of stages.
(19) In the first item, the operation member of the flexible variable member is in the vicinity of the bending knob.
(20) In the first item, the flexible variable member includes a coil pipe and a wire inserted through the coil pipe.
(21) In the first item, there is a gap between the partition member and the built-in object.

Sectional drawing which shows the internal structure of the electronic endoscope of a 1st form . Explanatory drawing of the schematic structure of the system of the endoscope apparatus of a 1st form similarly. Sectional drawing of the operation part case of the said endoscope similarly. Explanatory drawing of the flexible adjustment wire advance / retreat operation mechanism of the endoscope similarly. (A) (b) (c) is sectional drawing which each shows the specific example of the built-in structure of the soft part in the said endoscope insertion part. (A) (b) (c) (d) is a perspective view which shows the specific example of the cylinder for protection in the said endoscope, respectively. Explanatory drawing of use when the endoscope is inserted into the large intestine transanally. Explanatory drawing of the schematic structure of the system of the endoscope apparatus of a 2nd form . The perspective view of the flexibility adjustment jig of the endoscope of the 2nd form . Explanatory drawing which showed typically the principal part inside the endoscope of a 3rd form . The side view of the operation part of the endoscope of the 3rd form similarly. Explanatory drawing which similarly shows the relationship between the operation knob of the endoscope of the 3rd form , and the protrusion which latches this. Sectional drawing which shows the specific example of the built-in structure of the soft part in the endoscope insertion part of the 3rd form similarly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Endoscope apparatus, 2 ... Endoscope, 6 ... Insertion part, 7 ... Operation part, 9 ... Tip part, 11 ... Bending part, 12 ... Soft part, 22 ... Forceps channel, 23 ... Tube, 28 ... Signal Wire 31, light guide 36, angle wire guide 37, angle wire 39 39 coil pipe, 41 flexible adjustment wire 47 lever, 60 cylindrical body 61 air supply tube 62 water supply Tube 101 101 Wire insertion tube 103 Coil pipe 104 Rack 105 Pinion 107 Operation knob

Claims (8)

An insertion portion having a flexible cylindrical body;
An operation part provided on the hand side of the insertion part, and comprising an operation knob and a moving member that is advanced and retracted along the longitudinal direction of the insertion part with respect to the insertion part in accordance with an operation by the operation knob ;
A built-in which is disposed inserted into the tubular body a shall be used in the previous SL other than the ability to adjust, based on the insertion portion of the flexible operation of the operator application,
A tubular tube that is coaxially fitted to the built-in object , is connected to the moving member, and is compressed and deformed in the axial direction in accordance with advancement and retraction of the moving member . A flexible variable member;
Comprising a said forward and backward the movable member in operation by the operation knob when the flexibility of adjustment of the insertion portion required, the adjust the flexibility of the flexible variable member in accordance with this An endoscope characterized in that the flexibility of the insertion portion can be adjusted as appropriate.   The endoscope according to claim 1, wherein the flexible variable member is a coil pipe fitted into the built-in object. 3. The rack according to claim 2, wherein a rack as the moving member is attached to a proximal end portion of the coil pipe, and the rack can be advanced and retracted by rotating a pinion provided in the operation portion. Endoscope.   The endoscope according to claim 1, wherein the built-in object is a bending operation wire.   The endoscope according to claim 1, wherein the built-in object is a bending operation wire and a wire insertion tube through which the bending operation wire is inserted.   The endoscope according to claim 1, wherein the built-in object is a tube through which a fluid flows.   The endoscope according to claim 1, wherein the built-in object is a member of an optical system. The endoscope according to claim 7 , wherein the member of the optical system is a glass fiber.

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