JP5675334B2 - Endoscope - Google Patents

Description

  The present invention relates to an endoscope in which a bending portion is provided on the distal end side in the insertion direction of an insertion portion to be inserted into a duct.

  Conventionally, in the industrial field, by observing and inspecting scratches, corrosion, etc. in a subject by inserting a long and narrow insertion portion into a subject, for example, a boiler, turbine, engine, chemical plant, sewage pipe, etc. Endoscopes that can perform the above are widely used.

  Here, some insertion portions of industrial endoscopes are formed to be very long so that they can be sufficiently observed up to a deep portion in a long pipeline. In addition, the insertion portion is generally formed with flexibility so that a bent portion in the duct can easily pass therethrough.

  However, when the long insertion part has flexibility, when inserting the insertion part to the deep part by feeding the proximal end side of the insertion part from the vicinity of the inlet of the pipe to the inside of the pipe There is a problem that the feeding force is hardly transmitted to the distal end side of the insertion portion, and the insertion property of the insertion portion is poor.

  In view of such a problem, Patent Document 1 discloses that a guide wire inserted into a treatment instrument insertion conduit provided in an insertion portion is protruded forward from the distal end of the insertion portion, and the protruding guide wire is provided. The structure which improves the insertability of an insertion part by advancing an insertion part as a guide is disclosed. In addition, a configuration that improves the insertability of the insertion portion using a known oversheath is also well known.

JP 2005-328998 A

  However, even when a guide wire or a guide sheath is used, when the insertion portion is long, the insertion portion has flexibility, so that there is a problem that the insertion property of the arrow is poor.

  By the way, inside the insertion portion, fluid is supplied to the test site in addition to the light guide that supplies illumination light to the test site in the pipe, various power supply lines, and the treatment instrument insertion pipe described above. In general, a plurality of built-in objects such as various pulling wires such as a pulling wire that bends a bending portion provided in an insertion portion, and various kinds of conduits such as a conduit to be provided are provided. Furthermore, if another inspection tool or the like is provided in the insertion portion, the number of built-in items in the insertion portion increases.

  However, the internal structure of the insertion portion is complicated by these built-in objects. Moreover, since there are many built-in things of an insertion part, since an insertion part will become thick, since operativity fell, there existed a problem that the insertion property of an arrow-insertion part fell.

  The present invention has been made in view of the above-described problems, and has a configuration capable of reducing the amount of built-in objects disposed in the insertion portion and improving the insertability of the long insertion portion. An object of the present invention is to provide an endoscope.

In order to achieve the above object, an endoscope according to one aspect of the present invention is an endoscope in which a bending portion is provided on a distal end side in an insertion direction of an insertion portion to be inserted into a subject, and an outer periphery of the insertion portion. And a pressed member fixed to the rear of the insertion direction with respect to the bending portion, and a pipe-shaped push-in along the insertion portion that applies a pressing force to the pressed member in the front of the insertion direction. The push-in member is movable forward and backward in the insertion direction with respect to the insertion portion, and the distal end side in the insertion direction is inserted through a through-hole formed in the pressed member. A pressing member that protrudes forward in the insertion direction from the pressed member and is fixed to a rear position in the insertion direction than the pressed member of the pressing member is forward in the insertion direction of the pressing member. With the movement of To press the pressed member Te.
An endoscope according to another aspect of the present invention is an endoscope in which a bending portion is provided on a distal end side in an insertion direction of an insertion portion to be inserted into a subject. And a pressed member fixed to the rear in the insertion direction, and a pipe-shaped pressing member along the insertion portion that applies a pressing force to the pressed member in the front in the insertion direction. The pressed member is a base member that is detachably attached to the outer periphery of the insertion portion and at a position behind the bending portion in the insertion direction, and the base member has a tip of the push-in member in the insertion direction. It is composed of a fixed rear base member and a plurality of types of front base members that are selectively detachable with respect to the rear base member and are located in front of the rear base member in the insertion direction. And the rear of the pushing member After the front base member is mounted on the side base member, a power supply line for supplying driving power to the electrical components provided on the front side base member is provided.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to aim at reduction of the internal material arrange | positioned at an insertion part, the endoscope which comprises the structure which can improve the insertability of a long insertion part can be provided. .

The perspective view which shows the outline of a structure of the endoscope of 1st Embodiment. The fragmentary perspective view which shows the front end side of the insertion part of the endoscope of 2nd Embodiment The fragmentary perspective view which shows the front end side of the insertion part of the endoscope of 3rd Embodiment The figure which shows schematically the state by which the pulling wire of FIG. 3 was pulled and the front end side of the flexible tube part was curved. The fragmentary perspective view which shows the front end side of the insertion part of the endoscope of 4th Embodiment The figure which shows schematically the state by which the pulling wire of FIG. 5 was pulled and the front end side of the flexible tube part was curved. FIG. 5 is a schematic view of the centering member shown in FIG. The fragmentary perspective view which shows the front end side of the insertion part of the endoscope of 5th Embodiment Partially exploded perspective view showing a base member fixed to the rear of the bending portion and the distal end side of the push rod on the distal end side of the insertion portion of the endoscope of the sixth embodiment The fragmentary perspective view which shows the front end side of the insertion part of the endoscope of 7th Embodiment

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view schematically showing the configuration of the endoscope according to the present embodiment.
As shown in FIG. 1, the endoscope 1 includes an insertion portion 5 that is inserted into a conduit D (see FIG. 7), an operation portion 16, a connection cable 17, a device main body 20, a push rod 13, and the like. The main part is comprised.

  The insertion portion 5 has a long length, for example, about 20 m, and is inserted from the distal end side in the insertion direction S (hereinafter simply referred to as the distal end side) in order from the distal end portion 2 and the distal end portion 2. A bending portion 3 positioned on the base end side in the direction S (hereinafter simply referred to as a base end side) and a flexible flexible tube portion 4 positioned on the base end side of the bending portion 3 are provided.

  A plurality of types of known optical adapters 6 are detachable from the distal end portion 2. As is well known, the insertion portion 5 is constituted by a flexible tube portion 4 having flexibility except that the distal end portion 2 and the bending portion 3 are provided on the distal end side.

  Note that the bending portion 3 is usually softer than the flexible tube portion 4 so as to be easily bent, and the distal end portion 2 is hard to protect an imaging unit (not shown) provided therein. It is formed from a member.

  The operation unit 16 is provided on the proximal end side of the insertion unit 5, and the operation unit 16 is provided with a bending operation lever 16 a that performs the bending operation of the bending unit 3.

  The connection cable 17 extends from the operation unit 16 and has an extended end connected to the apparatus main body 20. The operation unit 16 and the apparatus main body 20 are connected by the connection cable 17.

  The apparatus body 20 is a control device that performs control such as driving and controlling an imaging unit provided in the distal end portion 2 and displaying an endoscopic image captured by the imaging unit on the display unit 21. A power source that supplies power to an illumination member such as an LED (not shown) provided in the optical adapter 6, a light source device that supplies illumination light to the light guide, and a gas that supplies gas A (see FIG. 10) into the pipe D A supply source and the like are provided inside.

  Further, centering members 7 and 9 having two radial shapes are inserted by the connecting coil member 11 behind the bending portion 3 in the insertion direction S (hereinafter simply referred to as the rear) with respect to the outer periphery of the insertion portion 5. It is fixed in a connected state along the direction S. That is, the centering members 7 and 9 are fixed to the outer periphery of the insertion portion 5, specifically, the outer periphery of the flexible tube portion 4 in a state of being separated in the insertion direction S.

  As is well known, the centering members 7 and 9 are for positioning the distal end side of the insertion portion 5 in the center of the pipe D within the pipe D, that is, with respect to the inner wall of the pipe D. The outer periphery on the distal end side of the insertion portion 5 is positioned at substantially equal intervals in all 360 ° directions in the radial direction of 5, and is formed of, for example, a hard material having no elastic force.

  The centering member 7 is located on the outer periphery on the distal end side of the flexible tube portion 4 behind the bending portion 3 with respect to a position near the base end in the insertion direction of the bending portion 3 (hereinafter simply referred to as the base end). , 8b (the base 8b is not shown) is detachable. Specifically, the centering member 7 is attached by being sandwiched between bases 8 a and 8 b detachably attached to the flexible tube portion 4. That is, the centering member 7 can be replaced by the caps 8a and 8b.

  Further, the tip of the connecting coil member 11 in the insertion direction S (hereinafter simply referred to as the tip) is detachably attached to the base 8b (not shown) with respect to the centering member 7.

  The centering member 9 which is a member to be pressed is positioned behind the centering member 7 by the connecting coil member 11 as described above, and attached to the position by the bases 10a and 10b (the base 10b is not shown). It is free. Specifically, the centering member 9 is attached by being sandwiched between bases 10 a and 10 b detachably attached to the flexible tube portion 4. That is, the centering member 9 can be replaced by the caps 10a and 10b.

  The base end of the connecting coil member 11 is detachably attached to the base 10a with respect to the centering member 9.

  The connecting coil member 11 is covered on the outer periphery of the flexible tube portion 4 and is detachable from the centering members 7 and 9 by the bases 8b and 10a as described above. Thereby, the connection coil member 11 can be replaced with one having a different length in the insertion direction S or one having a different hardness.

  The distance between the centering member 7 and the centering member 9 in the insertion direction S can be changed by changing the length of the connecting coil member 11.

  In addition, if the connecting coil member 11 is normally composed of a hard member, the straightness on the distal end side of the insertion portion 5 is improved, but there is a drawback that the passage of the bent portion in the duct D is reduced. Yes, if it is composed of a soft member, the passability of the bent portion is improved, but since there is a disadvantage that the straightness on the distal end side of the insertion portion 5 is reduced, it is not too hard and not too soft. It is composed of a hard member or a soft member giving priority to the passability of the bent portion.

  In addition, the push rod 13 having a predetermined hardness parallel to the insertion direction S along the insertion portion 5 and formed in a pipe shape from, for example, a carbon fiber rod or a glass fiber rod has a diameter equal to the outer circumference of the insertion portion 5. It is provided at a set interval in the direction.

  The push rod 13 has a proximal end fixed to the apparatus main body 20 and a distal end on the front side in the insertion direction S with respect to the centering member 7 through the through holes 8h and 10h provided in the centering members 7 and 9, respectively. (Hereinafter simply referred to as the front). That is, the front end side of the push rod 13 is supported by the centering members 7 and 9 by inserting the through holes 8h and 10h.

The push rod 13 is inserted through the through holes 8h and 10h so that the push rod 13 can move forward and backward in the insertion direction S with respect to the insertion portion 5. Further, a pressing member 12 is fixed at a position behind the centering member 9 of the push bar 13.
The push rod 13 is disposed on the pressing member 12 at a position where the adapter 6 and the distal end portion 2 are pulled forward from the centering member 7 when the push rod 13 is pulled to the hand side and the tip of the push rod 13 is located at the centering member 7. The length is set to 1 + Δl, which is slightly longer than the length 1 of the bending portion 3.
Then, considering the viewing angle θ of observation when the bending portion 3 in a state where the bending is not applied is straight, the position is set to be outside the visual field or slightly into the visual field.
Illuminate efficiently, make sure that it does not get in the way of observation, and make the push bar 13 slightly protrude from the tip, confirm the position of the push bar 13 and check the push bar 13 when curving. This is to prevent the pushing rod 13 from being bent forcibly.

  When the proximal end side of the push rod 13 is pushed forward from the vicinity of the inlet of the pipe D, the push member 12 is moved forward and brought into contact with the centering member 9 as the push rod 13 moves forward. The centering member 9 is pressed, that is, by applying a pressing force to the centering member 9, the insertability of the insertion portion 5 is improved. That is, in order to insert the distal end side of the insertion portion 5 to the deep portion, the distal end side of the insertion portion 5 is pushed in to assist.

  As described above, the connecting coil member 11 is composed of a member having a hardness that is not too hard and not too soft, or a soft member, and the long insertion portion 5 is mostly flexible. Since the flexible tube portion 4 and the soft curved portion 3 having the length of the insertion portion 5 are simply fed out from the vicinity of the inlet opening of the pipe D, the feeding force is applied to the distal end side of the insertion portion 5. This is because it is difficult to be transmitted and it is difficult to insert the distal end side of the insertion portion 5 to the deep portion.

  In addition, the pipe-shaped push rod 13 is supplied with illumination light into the pipe line. Specifically, the light is emitted from an illumination member such as an LED provided in the adapter 6 to assist the illumination light. A light guide 15 that is an inspection tool for supplying light is provided. The light guide 15 is made of, for example, quartz fiber.

  The light guide 15 transmits light supplied from the above-described light source device provided in the apparatus main body 20 from the proximal end to the distal end 13 s of the push rod 13, and the transmitted light is used as auxiliary light L. Irradiated from the tip 13s into the pipe D.

  That is, the push rod 13 has a function of supplying the auxiliary light L into the pipe D while assisting the insertion of the distal end side of the insertion portion 5 to the deep portion. Of course, the light emitted from the tip of the push rod 13 may be used as the main illumination light without providing any illumination member on the adapter 6.

  Thus, in the present embodiment, the centering member 9 is fixed to the rear of the curved portion 3 on the outer periphery of the long insertion portion 5, and the centering member 9 is fixed to the push-in bar 13. It has been shown that a pressing force is applied by the pressing member 12.

  According to this, even if the connecting coil member 11 is made of a soft member in consideration of the passability of the bent portion of the pipe D, the pressing member 12 is brought into contact with the centering member 9 by the hard push rod 13. By making contact and pressing the centering member 9 forward, the insertability of the long insertion portion 5 into the deep portion on the distal end side is reliably improved.

  Further, it is shown that the light guide 15 is provided inside the push rod 13. According to this, since the light emitted from the light source device in the apparatus main body 20 is irradiated into the pipe D as the auxiliary light L from the tip 13s of the push rod 13 through the light guide 15, the push is pushed. The rod 13 can be used as a means for irradiating the auxiliary light L.

  Therefore, it is not necessary to insert the light guide 15 for transmitting the auxiliary light L into the insertion portion 5, so that the built-in items of the insertion portion 5 can be reduced.

  From the above, it is possible to provide the endoscope 1 having a configuration capable of reducing the amount of built-in objects arranged in the insertion portion 5 and improving the insertability of the long insertion portion 5. .

A modification will be described below.
In the above-described embodiment, the push rod 13 is movable forward and backward with respect to the insertion portion 5 through the through holes 8h and 10h. As the push rod 13 moves forward, the push rod 13 It has been shown that the insertion property of the insertion portion 5 is improved by pressing the centering member 9 with the pressing member 12 provided in the position 13.

  Not limited to this, the tip 13s of the push rod 13 may be directly fixed to the centering member 7 without providing the pressing member 12.

  According to such a configuration, for the same reason as in the present embodiment, the centering member 7 can be pushed in by the push-in rod 13, thereby improving the insertion property of the insertion portion 5 into the deep portion of the pipe D. This can be achieved in the same manner as the above. In such a configuration, the centering member 7 constitutes a pressed member in the present embodiment.

  In the present embodiment, two centering members are shown as an example, but it is needless to say that one or three or more centering members may be used.

  Further, in the present embodiment, the push rod 13 is formed in a pipe shape and the light guide 15 is provided therein. However, the present invention is not limited to this, and the light guide 15 itself is a push rod. You may comprise.

In this case, the light guide 15 needs to be made of a quartz fiber having a predetermined hardness and flexibility as described above.
Moreover, the front side of the pressing member 12 of the push bar 13 may be a separate member, and the tip side may be made flexible.
In this case, when performing a bending operation, even if it strikes against the push-in rod 13, the bending load can be reduced and the bending is less likely to be hindered.

(Second Embodiment)
FIG. 2 is a partial perspective view showing the distal end side of the insertion portion of the endoscope according to the present embodiment.
The configuration of the endoscope according to the second embodiment is different from the endoscope according to the first embodiment shown in FIG. 1 described above in that the treatment tool can be inserted into the push rod. Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 2, the inside of the pipe-shaped push rod 13 has a treatment tool that performs a predetermined treatment on the inside of the pipe D, for example, a gripping portion 25 t that grips an object in the pipe D at the tip. A treatment tool 25, which is an inspection tool, can be inserted through the insertion direction S.

  In addition, as a treatment tool other than the treatment tool 25 having the grip portion 25t, a well-known treatment usually used in an industrial endoscope, such as a treatment tool for cutting a pipe D or an object located in the pipe D, or the like. Tools.

  Although not shown, an insertion / extraction port is formed on the proximal end side of the push-in bar 13 so that the treatment instrument can be inserted into and extracted from the inside. Other configurations are the same as those in the first embodiment described above.

  According to such a configuration, it is not necessary to provide a conduit for inserting the treatment instrument in the insertion portion 5, so that the built-in contents of the insertion portion 5 can be reduced. Other effects are the same as those in the first embodiment described above.

In the present embodiment, it is shown that one treatment instrument 25 is inserted into the push-in bar 13, but the present invention is not limited to this, and a plurality of treatment instruments may be freely inserted. Or the light guide 15 mentioned above may be freely insertable with a treatment tool.
Further, if the bending shape on the distal end side of the treatment instrument 25 is stored, in the case of treatment in the vicinity of the distal end 2, the treatment instrument 25 is slightly used with the push bar 13 as the distal end side, and is separated from the distal end 2. In the case of an existing treatment, the push rod is pulled toward the hand side, the length for projecting the treatment instrument 25 is increased, and the treatment tool 25 is bent greatly.
This allows a wide range of treatments.

(Third embodiment)
FIG. 3 is a partial perspective view showing the distal end side of the insertion portion of the endoscope according to the present embodiment, and FIG. 4 shows a state in which the distal end side of the flexible tube portion is bent as the pulling wire of FIG. 3 is pulled. It is a figure shown roughly.

  The configuration of the endoscope according to the third embodiment is different from the endoscope according to the first embodiment shown in FIG. 1 described above in that a puller wire can be inserted into the push rod. Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 3, in the present embodiment, the centering member 7 is detachable by caps 8 a and 8 b behind the base end of the bending portion 3 by a predetermined distance. A base member 38 is detachable at a position behind the end and ahead of the centering member 7.

  Further, on the outer periphery of the insertion portion 5, the front coil member 31 is covered between the base member 38 and the centering member 7. The front end and the base end of the front coil member 31 are detachable from the base member 38 and the centering member 7, respectively. Further, the front coil member 31 is made of a coarser winding, that is, a softer one than the connecting coil member 11 in consideration of the passage of the bent portion of the pipe D.

  Further, in the present embodiment, the tip of the push bar 13 is fixed to the centering member 7. Therefore, by pushing the pushing rod 13 forward, a pressing force is applied to the centering member 7, thereby improving the insertability of the insertion portion 5 into the deep part of the pipe D. The first and second embodiments described above. The same can be done. Therefore, in the present embodiment, the centering member 7 constitutes a pressed portion.

  Furthermore, a pulling wire 35, which is an inspection tool whose tip is fixed to the base member 38, can be inserted in the insertion direction S before and after the pipe-shaped push rod 13. Other configurations are the same as those in the first embodiment described above.

  According to such a configuration, when the pulling wire 35 is pulled, the base member 38 to which the tip of the pulling wire 35 is fixed is fixed to the rear of the bending portion 3, so that as shown in FIG. A portion of the flexible tube portion 4 covered with the front coil member 31 is curved in one direction as indicated by an arrow V.

  Therefore, along with the bending of the bending portion 3, the distal end side of the insertion portion 5 can be greatly bent, and the front coil member 31 of the flexible tube portion 4 is covered in a direction different from the bending portion 3. Since the region can be curved, the passage of the bent portion on the distal end side of the insertion portion 5 in the duct D is improved, and the observation range can be widened. Other effects are the same as those of the first embodiment described above.

  In the present embodiment, an example in which only one push rod 13 is provided has been described. However, a plurality of push rods 13 may be provided.

  Specifically, for example, if four push rods 13 are provided and a pulling wire having a tip fixed to the base member 38 is fixed inside each of the push rods 13, the flexible tube portion 4 is pulled along with the pulling of each pulling wire. The part covered with the front coil member 31 can be bent in four directions like the bending portion 3.

  Also in the present embodiment, in addition to the pulling wire 35, the light guide 15, the treatment tool 25, and the like may be inserted into the push rod 13.

(Fourth embodiment)
FIG. 5 is a partial perspective view showing the distal end side of the insertion portion of the endoscope according to the present embodiment, and FIG. 6 shows a state in which the distal end side of the flexible tube portion is bent as the pulling wire in FIG. 5 is pulled. 7 schematically shows the centering member of FIG. 5 as viewed from the direction VII in FIG.

  Compared to the endoscope of the third embodiment shown in FIGS. 3 and 4 described above, the configuration of the endoscope of the fourth embodiment is that the centering member is made of a spherical member. Different. Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 5, in the present embodiment, spherical centering members 47 and 49 are provided on the outer periphery of the insertion portion 5 behind the curved portion 3, and the bases 48a, 48b, 40a, and 40b (the base 48b) are provided. 40b are not shown). The functions of the centering members 47 and 49 are the same as the centering members 7 and 9 of the first embodiment described above.

  The centering members 47 and 49 are connected by the connecting coil member 11 as in the first embodiment. The connecting coil member 11 is detachable from the centering members 47 and 49.

  Further, as shown in FIG. 7, the insertion portion 5, that is, the flexible tube portion 4 is inserted into the centering members 47 and 49 eccentrically from the center P of the centering members 47 and 49 downward in the radial direction. Has been.

  The flexible tube portion 4 is always located below the pipe line D even if the centering members 47 and 49 are rotated by its own weight. Even if the flexible tube portion 4 is eccentric to the lower side with respect to the centering members 47 and 49, the distal end side of the flexible tube portion 4 becomes the inner wall of the pipe line D by the spherical centering members 47 and 49. There is no rubbing.

  Furthermore, through holes 47h and 49h penetrating in the insertion direction S are provided at positions above the holes through which the insertion portions 5 of the centering members 47 and 49 are inserted, and the through holes 47h and 49h are provided. The tip of the push rod 13 is fixed to the centering member 47 via

  From this, pressing force is applied to the centering member 47 by pushing the pushing rod 13 forward, so that the insertion performance of the insertion portion 5 into the deep portion of the pipe D is improved in the first to third embodiments described above. This can be achieved in the same manner as the above. Therefore, in the present embodiment, the centering member 47 constitutes a pressed portion.

  Further, on the outer periphery of the insertion portion 5, the base member 38 is detachable at a position behind the base end of the bending portion 3 and ahead of the centering member 47.

  Further, the pulling wire 35 can be inserted back and forth inside the push rod 13, and the tip of the pulling wire 35 is fixed to the fixing portion 38 k of the base member 38. Other configurations are the same as those of the third embodiment described above.

According to such a configuration, when the pulling wire 35 is pulled, the base member 38 to which the tip of the pulling wire 35 is fixed is fixed to the rear of the bending portion 3, so that as shown in FIG. A portion of the flexible tube portion 4 between the base member 38 and the centering member 47 is curved upward as indicated by an arrow W. Therefore, together with the bending of the bending portion 3, the distal end side of the insertion portion 5 can be greatly bent upward, and the observation range can be widened.
Further, since the flexible tube 4 rotates with respect to the centering member 47 and the position is surely on the lower side as shown in FIG. 6, it may be supported via a bearing.

  As shown in FIG. 7, since the insertion portion 5 is eccentrically inserted downward with respect to the centering member 47, a large space above the insertion portion 5 is secured in the pipe D. This is because the distal end side of the insertion portion 5 can be bent upward in a larger direction than usual.

  In the configuration of the present embodiment, similarly to the third embodiment described above, the portion between the base member 38 and the centering member 47 of the flexible tube portion 4 is arranged in a direction different from the bending portion 3. Can be curved.

  Other effects are the same as those of the first embodiment described above.

(Fifth embodiment)
FIG. 8 is a partial perspective view showing the distal end side of the insertion portion of the endoscope according to the present embodiment.
Compared with the endoscope of the first embodiment shown in FIG. 1 described above, the configuration of the endoscope of the fifth embodiment is that a power supply line is provided inside the push rod. Is different. Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 8, in the present embodiment, the centering member 57 has a streamlined shape that curves in a backward direction and is composed of one, and the outer periphery of the insertion portion 5. In FIG. 2, the caps 58a and 58b (the cap 58b is not shown) are detachably fixed behind the bending portion 3.

  The tip of the push bar 13 is fixed to the centering member 57. From this, the pressing force is applied to the centering member 57 by pushing the push rod 13 forward, so that the insertability of the insertion portion 5 into the deep portion of the pipe D is improved in the first to fourth embodiments described above. This can be achieved in the same manner as the above. Therefore, in the present embodiment, the centering member 57 constitutes a pressed portion.

  A flexible substrate 51 is fixed to the front surface of the centering member 57, and a plurality of illumination members, for example, LEDs 52, for supplying illumination light into the duct are electrically connected to the flexible substrate 51. The illumination light illuminated from the LED 52 may be either auxiliary light or main illumination light.

  Furthermore, in the present embodiment, a power supply line 55 that is an inspection tool for supplying power to the LED is provided inside the pipe-shaped push rod 13. The tip of the power supply line 55 is electrically connected to the flexible substrate 51. Other configurations are the same as those in the first embodiment described above.

  According to such a configuration, it is not necessary to provide the power supply line 55 in the insertion portion 5, so that the built-in contents of the insertion portion 5 can be reduced. Other effects are the same as those in the first embodiment described above.

Also in the present embodiment, in addition to the power supply line 55, the light guide 15, the treatment instrument 25, the pulling wire 35, and the like may be inserted into the push rod 13.
Furthermore, the centering member 57 may be bent in advance in the vicinity of the flexible tube portion 4 so that the centering member 57 is opened by pushing the push rod 13.
Opening by pushing and closing by pulling enables insertion according to the pipe size.

(Sixth embodiment)
FIG. 9 is a partially exploded perspective view showing a base member fixed to the rear side of the bending portion and the front end side of the push rod on the distal end side of the insertion portion of the endoscope according to the present embodiment.

  Compared with the endoscope of the fifth embodiment shown in FIG. 8 described above, the configuration of the endoscope of the sixth embodiment is supplied with electric power from a power supply line provided inside the push rod. The difference is that the electrical member is provided on the front base member that is detachable from the rear base member. Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the fifth embodiment, and description thereof will be omitted.

  As shown in FIG. 9, in the present embodiment, a cap member 63 composed of a front cap member 61 and a rear cap member 68 is detachable on the outer periphery of the insertion portion 5 behind the bending portion 3. It has become.

  A connector 66 provided at the tip of the push rod 13 is detachably attached to the rear base member 68. After the connector 66 is mounted, the connector 66 is electrically connected to a rear connector 68s provided on the front end surface of the rear base member 68.

  Further, after the connector 66 is mounted, the pusher bar 13 is pushed forward so that a pressing force is applied to the rear cap member 68. Therefore, the insertion property of the insertion portion 5 into the deep portion of the pipe D is improved. This can be achieved similarly to the first to fifth embodiments. Therefore, in the present embodiment, the rear base member 68 constitutes a pressed portion.

  The front base member 61 is a base 61b to which a base 61a to which an illumination member such as an LED 61 as an electrical part is fixed, or a C-MOS unit 69 which is an electrical part that can be screwed to the female screw 61n is detachable via the female screw 61n. Etc., and any one of the caps is selectively detachable from the rear cap member 68. Other examples of the front base member 61 include a base having a temperature sensor as an electrical component.

  The front base member 61 is detachable from the rear base member 68 via a key groove 68k formed on the outer peripheral surface of the rear base member 68. The key groove 68k restricts, that is, positions, the front base member 61 relative to the rear base member 68 after the mounting. One centering member as shown in the first embodiment may be inserted between the base 61 and the base 68.

  Further, after the front base member 61 is attached to the rear base member 68, the rear connector 68 s is electrically connected to a front connector (not shown) provided on the front base member 61.

  Also in the present embodiment, a power supply line 55 is provided inside the push rod 13. When the push rod 13 is attached to the rear base member 68 and the front base member 61 is attached to the rear base member 68, the power supply line 55 is connected to the rear side via the connector 66, the rear connector 68s, and the front connector. Drive power is supplied to the LEDs 62 of the base 61a selectively attached to the base member 68 and the C-MOS unit 69 of the base 61b. Other configurations are the same as those of the fifth embodiment described above.

  According to such a configuration, similarly to the fifth embodiment, it is not necessary to provide the power supply line 55 in the insertion portion 5, so that the built-in items of the insertion portion 5 can be reduced. Further, by simply replacing the front base member 61 with respect to the rear base member 68, a base having a plurality of types of electrical components can be mounted, and driving power can be supplied to each electrical component after mounting. .

  Other effects are the same as those of the first embodiment described above. Also in the present embodiment, in addition to the power supply line 55, the light guide 15, the treatment instrument 25, the pulling wire 35, and the like may be inserted into the push rod 13.

(Seventh embodiment)
FIG. 10 is a partial perspective view showing the distal end side of the insertion portion of the endoscope according to the present embodiment.
The configuration of the endoscope according to the seventh embodiment is such that a gas supply path is provided inside the push-in rod as compared with the endoscope according to the first embodiment shown in FIG. 1 described above. Is different. Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  In the present embodiment, as shown in FIG. 10, the push rod 13 is provided so as to protrude forward from the lens 6 r that is an objective optical system provided on the tip surface of the adapter 6, and the centering member 7. A stopper 74 is provided at a portion protruding further forward.

  In addition, a fluid supply path R that is a flow path is formed inside the push rod 13. Specifically, a pipe-shaped inner pipe member 77 is provided inside the push rod 13. The region 13i between the inner peripheral surface of the rod 13 to be pushed in and the outer peripheral surface of the inner pipe member 77 has a configuration in which the tip is closed by welding, solder, or the like.

  Further, a side opening 13h that communicates with the region 13i is formed on the outer peripheral surface of the push rod 13 so as to be positioned in front of the retainer 74, specifically, at the same position as the lens 6r in the insertion direction S. Yes. When the adapter 6 is not attached to the distal end portion 2, the side opening 13 h is formed in the same position as the lens provided on the distal end surface of the distal end portion 2 in the insertion direction S. Further, the position of the side opening 13h with respect to the lens can be adjusted by moving the push bar 13 forward and backward.

  The inside 77i of the inner pipe member 77 constitutes a first gas supply path that supplies the gas A into the pipe line from the tip opening of the inner pipe member 77 and removes dirt on the site to be examined in the pipe D. ing.

  In addition, the region 13i constitutes a second gas supply path that supplies the gas A to the lens 6r from the side opening 13h and removes dirt on the lens 6r. Other configurations are the same as those in the first embodiment described above.

  According to such a configuration, it is not necessary to provide a gas supply path for supplying gas into the lens 6r or the pipe D in the insertion portion 5, and therefore, the amount of built-in material in the insertion portion 5 can be reduced. Other effects are the same as those of the first embodiment described above.

  In the first to seventh embodiments described above, the push rod 13 is shown as an example, but the present invention is not limited to this, and it may be composed of a plurality of push rods. Of course. In this case, the members provided inside may be different for each push rod.

  Furthermore, the endoscope 1 includes an insertion portion 5 to be inserted into the pipe D in addition to the push rod 13, an operation portion 16, a connection cable 17, and an apparatus main body 20, and a main portion is configured. I showed that.

  Not only this but the structure where the insertion part 5 was extended from the apparatus main body 20 WHEREIN: The structure by which the operation part 16 was interposed in the middle position of the insertion part 5, and the structure by which the operation part 16 was provided in the apparatus main body 20 Needless to say, the present invention may be applied.

DESCRIPTION OF SYMBOLS 1 ... Endoscope 3 ... Bending part 5 ... Insertion part 6r ... Lens (objective optical system)
7. Centering member (member to be pressed)
8h ... through hole 9 ... centering member (member to be pressed)
10h ... through hole 12 ... pressing member 13 ... pressing rod 13h ... side opening 13i ... region (second gas supply path)
DESCRIPTION OF SYMBOLS 15 ... Light guide 25 ... Treatment tool 35 ... Pulling wire 38 ... Base member 47 ... Centering member (pressed member)
52 ... LED (lighting member)
55 ... Power supply line 57 ... Centering member (member to be pressed)
61 ... front side cap member 62 ... LED (electrical part)
63 ... Base member 68 ... Rear side base member (pressed member)
69 ... C-MOS sensor (electrical parts)
77 ... Inner pipe member 77i ... Inside of the inner pipe member (first gas supply path)
A ... Gas D ... Pipe line P ... Center of centering member R ... Gas supply path S ... Insertion direction

Claims (10)

An endoscope provided with a bending portion on the distal end side in the insertion direction of an insertion portion to be inserted into a subject,
On the outer periphery of the insertion portion, a pressed member fixed to the rear of the insertion direction rather than the bending portion;
A pipe-shaped pushing member along the insertion portion that applies a pressing force to the pressed member forward in the insertion direction , and
The pushing member is movable forward and backward in the insertion direction with respect to the insertion portion, and the distal end side in the insertion direction is more than the pressed member through a through hole formed in the pressed member. Protrudes forward in the insertion direction,
A pressing member fixed at a rear position in the insertion direction with respect to the pressed member of the pressing member presses the pressed member as the pressing member moves forward in the insertion direction. Endoscope.   The pressed member is a centering member that is located on the outer periphery of the insertion portion and is detachable with respect to the rear in the insertion direction with respect to the bending portion, and that positions the insertion portion at the center of the conduit. The endoscope according to claim 1. The endoscope according to claim 1, wherein a light guide that supplies illumination light to the subject is provided inside the pushing member . The treatment tool for performing a treatment on the subject, which can be inserted through the push-in member before and after the insertion direction, is provided in the push-in member. The endoscope described. The base further comprises a base that is detachable at the outer periphery of the insertion portion and at a position behind the bending portion in the insertion direction and ahead of the pressed member in the insertion direction,
5. The pulling wire having a distal end in the insertion direction fixed to the base is provided inside the push-in member so as to be inserted before and after the insertion direction. 6. The endoscope according to item 1 . The endoscope according to claim 5, wherein the insertion portion is located eccentrically in a radial direction with respect to a center of the pressed member . The pressed member is provided with an illumination member that supplies illumination light to the subject,
The endoscope according to any one of claims 1 to 6, wherein a power supply line for supplying driving power to the illumination member is provided inside the pushing member . The endoscope according to claim 1, wherein a gas supply path is provided inside the pushing member . A pipe-shaped inner pipe member is further provided inside the pushing member,
In the region between the outer peripheral surface of the inner pipe member and the inner peripheral surface of the push-in member, the distal end in the insertion direction is closed,
A first gas supply path serving as the gas supply path for supplying gas to the subject from the opening in the insertion direction of the inner pipe member is configured inside the inner pipe member,
A second gas supply serving as the gas supply path for supplying gas to the objective optical system provided in the insertion portion from a side opening provided to communicate with the region on the outer peripheral surface of the pushing member in the region. The endoscope according to claim 8 , wherein a path is configured . An endoscope provided with a bending portion on the distal end side in the insertion direction of an insertion portion to be inserted into a subject,
On the outer periphery of the insertion portion, a pressed member fixed to the rear of the insertion direction rather than the bending portion;
A pipe-shaped pushing member along the insertion portion that applies a pressing force to the pressed member forward in the insertion direction, and
The pressed member is a cap member that is detachable at a position on the outer periphery of the insertion portion and behind the bending portion in the insertion direction,
The base member includes a rear base member to which a distal end of the push-in member in the insertion direction is fixed, and is selectively detachable from the rear base member in the insertion direction rather than the rear base member. It is composed of a plurality of types of front base members positioned in the front,
A power supply line for supplying driving power to an electrical component provided on the front base member after the front base member is mounted on the rear base member is provided inside the pushing member. endoscope you.

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