JP4800743B2 - Endoscope device - Google Patents

Description

  The present invention relates to an endoscope apparatus including a flexible tube having an elastic member layer and an outer layer knitted tube that is flexible and braided with a thin wire to cover the flexible tube.

  In general, an endoscope apparatus includes an elongated flexible tube that can be easily inserted into a subject, and a bendable bending portion that is arranged near the distal end of the flexible tube so that the endoscope device can be easily introduced into a bent inspection target site. An insertion portion connected at the distal end side cap portion is provided. Particularly in the industrial field, in order to protect the insertion portion from a load applied from a subject, an outer layer knitted tube in which a thin wire is braided in the insertion portion is covered over the entire insertion portion including the flexible tube and the bending portion. I am letting. Such an outer layer knitted tube also plays a role of reducing friction with the subject and facilitating introduction into the examination site.

As such an endoscope apparatus, the bending portion and the flexible tube are covered with one outer layer knitted tube (for example, refer to Patent Document 1), and the bending portion and the flexible tube are separately provided. The thing (for example, refer patent document 2) coat | covered with the outer layer knitted pipe is proposed.
JP 2000-166858 A Japanese Patent Publication No. 6-46264

  However, for example, in the case of the endoscope device described in Patent Document 1, since one outer layer knitted tube is covered, the specifications of the outer layer knitted tube are the same in both the flexible tube and the curved portion. That is, in the case of an outer layer knitted tube having a specification in consideration of bending performance, the resistance of the flexible tube is low. On the other hand, when the outer layer knitted tube having the specifications in consideration of durability is used, the bending performance at the bending portion is lowered.

Moreover, in the case of the endoscope apparatus described in Patent Document 2, the curved portion of the outer layer knitted tube or the covering of the flexible tube is formed by assembling the distal end portion or the curved portion to the flexible tube and inserting the signal system therein. In this state, the outer layer knitted tube prepared separately is manually fitted, and workability is poor.
Furthermore, the outer layer metal braided tube is fixed to the flexible tube or the bending portion by fixing a fixing base member to the end, and connecting the base member to the distal end side base portion connecting the flexible tube and the bending portion. Since it is performed by fixing, the outer diameter of the fixing part will be thick.

  The present invention has been made in view of the above circumstances, and even if the outer layer knitted tube in the bending portion and the flexible tube is made a separate body, without increasing the outer diameter of the distal end side cap portion, each portion is provided. An object of the present invention is to provide an endoscope apparatus in which an outer layer knitted tube having suitable specifications is arranged.

The present invention employs the following means in order to solve the above problems.
An endoscope apparatus according to the present invention includes a flexible tube having an elastic member layer, a bending portion that can be bent with respect to the flexible tube, and a flexible and thin wire braided to form the flexible tube. An endoscope apparatus comprising an insertion portion having a covering outer layer knitted tube and a tubular distal end side cap portion connecting the curved portion to a distal end of the flexible tube, wherein the distal end side cap portion is the outer layer knitted shape A short tube that squeezes the tip of the tube and fixes the tube to the flexible tube, and an axial direction of the flexible tube that follows the shape of the flexible tube exposed to the tip side of the short tube A tip cap disposed on the flexible tube .

  According to the present invention, the outer tube can be reliably fixed to the flexible tube by applying a restriction such as swaging to the short tube. Moreover, the operation | work which connects a front end side nozzle | cap | die part to a flexible tube, and the operation | work which fixes an outer layer knitted tube to a flexible tube can each be performed separately, and workability | operativity can be improved.

Moreover, the endoscope apparatus according to the present invention is the endoscope apparatus, characterized in that a tubular member protruding from the elastic member layer to the distal end of the flexible tube is arranged.
According to the present invention, the tubular member and the distal end cap can be bonded and fixed, and the distal end cap can be fixed to the flexible tube without swaging the distal end of the flexible tube.

  The endoscope apparatus according to the present invention is the endoscope apparatus described above, wherein the outer layer knitted tube is fixed to the flexible tube from the outside in the radial direction at the proximal end of the flexible tube. An end cap fixing portion is disposed, and the rear end cap fixing portion fixes the outer knitted tube to the elastic member layer, and the axial direction of the flexible tube with respect to the first tube portion And a second pipe portion connected to the elastic member layer.

  In this invention, since the first tube portion and the second tube portion do not overlap in the radial direction, when the rear end of the outer layer knitted tube is fixed to the flexible tube, it is fixed without increasing the outer diameter at the connection portion. can do.

  According to the present invention, even if the outer layer knitted tube is provided separately in the bending portion and the flexible tube, the outer layer knitted tube having a specification suitable for each portion without increasing the outer diameter of the distal end side cap portion. Can be arranged.

A first embodiment according to the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, an endoscope apparatus 1 according to this embodiment includes an industrial endoscope (hereinafter referred to as an endoscope) 3 having a flexible elongated insertion portion 2. A cylindrical drum portion 5 that winds up the insertion portion 2 of the endoscope 3, a frame portion 6 that rotatably holds the drum portion 5, and an upper end of the frame portion 6, and various switches and A front panel 7 in which connectors and ducts for supply and exhaust are arranged, a remote controller (hereinafter referred to as a remote controller) 8 which is a remote control device detachably connected to the front panel 7 via a cable 8A, and a telescopic type The monitor 10 is an observation device rotatably supported by the pole, a box-shaped case main body 11A, and a lid 11B that covers the front panel 7 provided on the upper surface of the case main body 11A so as to be openable and closable. Stored inside A housing case 11 having a cushioning material or the like to suppress the impact force applied to the device, the power is connected to the front panel 7 in the AC cable 12 can supply is mainly composed. The drum portion 5 is not essential, and the insertion portion 2 may be directly stored in the storage case 11.

The insertion portion 2 extends from the inside of the case main body 11A via a rubber member 2a for buckling prevention disposed on the front panel 7.
As shown in FIGS. 3 and 4, the insertion portion 2 includes, in order from the distal end side, a rigid distal end main body portion 15 having an imaging element 13 and a distal end side disposed on the rear end side of the distal end main body portion 15. A bendable bending portion 16 that directs the main body portion 15 in a desired direction, an elongated flexible tube 17, an outer knitted tube 18 that is flexible and braided with a thin metal wire and covers the flexible tube 17, A tubular distal end base portion 20 that connects the bending portion 16 in the distal direction of the flexible tube 17 is provided.

Various optical adapters 21 for converting optical characteristics such as a viewing direction and a viewing angle are detachably attached to the distal end main body portion 15.
The bending portion 16 is covered with a bending portion outer layer knitted tube 22 that is separate from the outer layer knitting tube 18 and is intended to protect the bending portion 16 and ensure slipperiness with a subject (not shown). The bending portion outer layer knitted tube 22 has a distal end side in the vicinity of a tubular tip body base 23 connecting the distal end main body portion 15 and the bending portion 16, and a rear end side connecting the bending portion 16 and the flexible tube 17. It is fixed in the vicinity of the side cap portion 20 by an adhesive G, a bobbin fixing, or both a bobbin fixing and an adhesive.

  The distal end base portion 20 is provided in parallel with the distal end cap 24 connected to the bending portion 16 and the flexible tube 17, and in the axis C direction of the flexible tube 17 with respect to the distal end cap 24, and the outer layer knitted tube 18. And a short tube 25 that is squeezed and fixed to the flexible tube 17 so that the distal end side of the tube does not open. The distal end cap 24 is further fitted with a bending portion connecting portion 24A connected to the inner peripheral surface of the bending portion 16, and an inner layer resin 28 described later of the flexible tube 17 disposed on the rear end side of the bending portion connecting portion 24A. And a flexible tube connecting portion 24B to be connected.

  The flexible tube connecting portion 24B has a small diameter portion 24Ba having a constant inner diameter that can be fitted to an inner layer knitted tube 27 described later of the flexible tube 17, and a constant inner diameter that can be fitted to the inner layer resin 28. And a distal end cap large diameter portion 24Bb.

  The flexible tube 17 includes, in order from the inside, a flex 26 in which a flat plate material is spirally wound, an inner layer knitted tube 27 that covers the flex 26 in order to prevent the flexible tube 17 from being twisted, and extrusion molding these. For example, a thermoplastic inner layer resin (elastic member layer) 28 such as a polyester elastomer is laminated. A part of the inner layer resin 28 is impregnated in the inner layer knitted tube 27 and the flex 26 so that it does not easily peel off. The flex 26 and the inner layer knitted tube 27 are made hard by being partly integrated with solder.

The outer layer knitted tube 18 is coated on the inner layer resin 28 for the purpose of protecting the flexible tube 17 and ensuring slipperiness with the subject.
The outer layer knitted tube 18 is knitted with a specification different from that of the bent portion outer layer knitted tube 22 that greatly affects the bending performance. For example, the knitted wire diameter is set larger than that of the bent portion outer layer knitted tube 22. ing.

  The outer knitted tube 18 is impregnated from the outer peripheral surface side with a thermoplastic outer layer resin (not shown) such as a polyester elastomer so that a part of the outer knitted tube 18 is exposed on the outermost layer surface. Yes. The outer layer resin and the inner layer resin 27 impregnated in the inner layer knitted tube 27 and the flex 26 are integrated by melting or bonding.

  On the other hand, as shown in FIG. 2 and FIG. 5A, a rear end cap fixing portion 35 is disposed on the rear end side of the flexible tube 17 and the outer layer knitted tube 18. As shown in FIG. 1, the rear end cap fixing portion 35 is connected to an electric bending mechanism portion 42 described later for bending the bending portion 16.

  That is, the electric bending mechanism 42 pulls an operation wire (not shown) whose end is fixed to the distal end of the bending portion 16 through the flexible tube 17 to bend the bending portion 16 and connects to the distal end of the bending portion 16. The tip body 15 thus made can be directed in a desired direction. This operation wire is covered with a coil pipe (not shown) in order to improve bendability and resistance.

The rear end cap fixing portion 35 includes a rear end cap 36 having a connector 36A, a first tube portion 38A for fixing the outer layer knitted tube 18 to the inner layer resin 28, and the flexible tube 17 with respect to the first tube portion 38A. And a second pipe part 38B connected to the inner layer resin 28.
The first tube portion 38A and the second tube portion 38B have the same outer diameter, and the second tube portion 38B is preferably made of a soft material such as an aluminum alloy. Since the second pipe portion 38B is crushed in the radial direction between the flexible tube 17 and the rear end cap 36, as shown in FIG. The outer diameter may be smaller than the outer diameter of the first pipe portion 38A.
The rear end cap 36 is fixed to the first tube portion 38A and the second tube portion 38B, and has a penetration length for inserting solder or the like for ensuring electrical conduction with the flexible tube 17. A hole 36A is arranged.

  The drum unit 5 performs signal processing on the light source unit 40 that supplies illumination light to a light guide (not shown) inserted into the insertion unit 2 of the endoscope 3 and the image sensor 13 provided on the distal end main body unit 15. A camera control unit (hereinafter referred to as CCU) 41 to be performed, an electric bending mechanism portion 42 that electrically drives the bending portion 16 of the insertion portion 2 via a transmission operation wire, and an operation instruction signal from the remote controller 8 The electric bending circuit section 43 and the like for controlling the bending state of the bending section 16 to a desired state by driving and controlling a motor unit (not shown) included in the electric bending mechanism section 42 is housed.

  The electric bending mechanism part 42 and the electric bending circuit part 43 are connected via a drive cable (not shown). The electric bending circuit unit 43 drives and controls the motor unit of the electric bending mechanism unit 42 based on an operation instruction signal generated by the operation of the remote controller 8 to bend the bending portion in a desired direction.

  Connected to the CCU 41 is a signal line 45 shown in FIG. 3 inserted from the distal end main body portion 15 into the insertion portion 2. The CCU 41 converts the image signal transmitted from the image pickup device 13 disposed in the distal end main body portion 15 of the insertion portion 2 to the TV signal through the signal line 45 and then transmits the TV signal to the monitor 10. It has become.

  The remote controller 8 is for remotely controlling the bending operation of the bending portion 16, and as an operation member for performing bending control, for example, a joystick 46 is disposed near the center as shown in FIG. A bend ON button 47 is disposed on the lower end side of the joystick 46.

Next, the manufacturing method of the insertion part 2 in the endoscope 3 according to the present invention will be described.
First, the inner layer knitted tube 27 is coated on the flex 26, and the distal ends of the flex 26 are integrated with solder to be hardened. The inner layer resin 28 is coated from the outside to form the flexible tube 17. The flexible tube 17 in this state is inserted into the outer layer knitted tube 18 to cover the outer resin. And the front-end | tip part is cut | disconnected and it is set as the state shown to Fig.6 (a). In addition, you may coat | cover the outer layer knitted tube 18 directly with respect to the flexible tube 17 with a brader machine.

Next, as shown in FIG. 6B, the short tube 25 is fixed at a predetermined position while the short tube 25 is inserted into the outer side of the outer layer knitted tube 18 and swung. The short tube 25 may be inserted before cutting the tip of the outer layer knitted tube 18.
Then, as shown in FIG. 6C, the outer layer knitted tube 18 at the tip of the short tube 25 is peeled off to expose the inner layer resin 28. Further, the tip end side is peeled off from the exposed inner layer resin 28 to expose the inner layer knitted tube 27 as shown in FIG.

  Subsequently, the flexible tube connecting portion 24B of the distal end cap 24 is extrapolated to the flexible tube 17, and the distal end cap small diameter portion 24Ba of the flexible tube connecting portion 24B and the inner layer knitted tube 27 are fitted and bonded. The distal end cap large diameter portion 24Bb and the inner layer resin 28 are fixed by swaging and adhesion. Thereby, the tip cap 24 and the flexible tube 17 are firmly fixed, and the airtightness of the flexible tube 17 is reliably ensured. Here, when a gap is generated between the tip cap 24 and the short tube 25, repair bonding is performed using an adhesive G as shown in FIG.

  Thus, the bending portion 16 and the bending portion connecting portion 24A of the distal end cap 24 are fitted and bonded, and the distal end main body portion 15 is attached to obtain the distal end side of the insertion portion 2.

  With respect to the rear end side of the insertion portion 2, as shown in FIG. 7B, the rear end side of the outer layer knitted tube 18 into which the flexible tube 17 is inserted as shown in FIG. The first tube portion 38A is inserted outside, or the first tube portion 38A is inserted after the outer resin is coated. Then, the first tube portion 38A is swaged and bonded and fixed, and as shown in FIG. 7C, the outer layer knitted tube 18 on the rear end side is peeled off from the first tube portion 38A to remove the inner layer resin. 28 is exposed.

  Subsequently, the second pipe portion 38B is inserted into the rear end side of the first pipe portion 38A so as to be aligned in the direction of the axis C of the flexible tube 17, and as shown in FIG. After swaging in the same manner, the adhesive is fixed. Thereafter, as shown in FIG. 7 (e), the rear end of the second pipe portion 38B is cut to a suitable length so that the first pipe portion 38A and the second pipe are shown in FIG. 7 (f). The rear end cap 36 is fitted to the outside of the portion 38B and fixed and attached with an adhesive or the like. Thereby, the rear end cap 36 and the flexible tube 17 are firmly fixed, and the airtightness of the flexible tube 17 is reliably ensured. In this way, the rear end side of the insertion portion 2 is obtained by pouring solder into the through long hole 36 </ b> A of the rear end cap 36.

According to this endoscope apparatus 1, the operation of connecting the distal end side cap portion 20 to the flexible tube 17 and the operation of fixing the outer layer knitted tube 18 to the flexible tube 17 can be performed separately, Workability can be improved. Further, since the distal end cap 24 and the short tube 25 do not overlap with the insertion portion 2 in the radial direction, the outer layer knitted tube 18 covering the flexible tube 17 and the curved portion outer layer knitted tube 22 covering the bending portion 16 Even if these are separated, the outer layer knitted tube 18 can be fixed without increasing the outer diameter of the distal end side cap portion 20.
Therefore, the outer layer knitted tube 18 and the curved portion outer layer knitted tube 22 can be arranged as having suitable specifications for the flexible tube 17 and the curved portion 16, respectively.

  Similarly, since the first tube portion 38A and the second tube portion 38B do not overlap in the radial direction also on the rear end side of the insertion portion 2, when fixing the rear end of the outer layer knitted tube 18 to the flexible tube 17, It can fix without increasing the outer diameter in a connection part.

Next, a second embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to 1st Embodiment mentioned above, and description is abbreviate | omitted.
The difference between the second embodiment and the first embodiment is that the flexible tube connecting portion 52B of the distal end cap 52 in the insertion portion 51 of the endoscope apparatus 50 according to the present embodiment is fixed to the inner layer resin 28. The inner diameter side base 52BA and the outer diameter side base 52BB fitted on the inner diameter side base 52BA are provided with a double structure in the radial direction.

The manufacturing method of this insertion part 51 is demonstrated.
First, as in the first embodiment, the inner layer knitted tube 27 is coated on the flex 26, and the distal ends of each are integrated with solder. The inner layer resin 28 is coated from the outside to form the flexible tube 17. The flexible tube 17 in this state is inserted into the outer layer knitted tube 18 to cover the outer resin. And the front-end | tip part is cut | disconnected and it is set as the state shown to Fig.9 (a).

Next, as shown in FIG. 9B, the short tube 25 is inserted into the outer side of the outer knitted tube 18 and is swaged and fixed at a predetermined position. The short tube 25 may be inserted before cutting the tip of the outer layer knitted tube 18.
Then, as shown in FIG. 9C, the outer layer knitted tube 18 at the tip of the short tube 25 is peeled off to expose the inner layer resin 28. Further, the tip end side is peeled off from the exposed inner layer resin 28 to expose the inner layer knitted tube 27 as shown in FIG.

Here, as shown in FIG. 9 (e), the inner diameter side base 52BA of the tip base 52 is extrapolated to the flexible tube 17, fitted with the inner layer resin 28 and fixed by swaging, and the inner layer knitted tube Adhesive fixing to 27.
And as shown in FIG.9 (f), the outer diameter side nozzle | cap | die 52BB is externally fitted to the inner diameter side nozzle | cap | die 52BA, and it adheres and fixes.

  Thus, the bending portion 16 and the bending portion connecting portion 24A of the distal end cap 52 are fitted and bonded, and the distal end main body portion 15 is attached to obtain the distal end side of the insertion portion 51. The rear end side of the insertion portion 51 is assembled in the same manner as in the first embodiment.

According to the endoscope apparatus 50, even if the tip cap 52 is damaged during the swaging operation when the tip cap 52 is attached, only the inner diameter side cap 52BA needs to be replaced, and the risk of breakage can be reduced. it can.
Further, unlike the first embodiment, the coil pipe 53A of the operation wire 53 is attached to the outer diameter side base 52BB, and therefore, during the swaging operation of the inner diameter side base 52BA, the coil pipe 53A is twisted and buckled, The risk of damaging the coil pipe 53A due to a work mistake can be suppressed.

Next, a third embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the third embodiment and the first embodiment is that the flexible tube 62 in the insertion portion 61 of the endoscope apparatus 60 according to this embodiment has an inner layer resin 28 as shown in FIG. The tubular member 63 is projected from the circumferential front end side.

As shown in FIG. 11, a plurality of U-shaped grooves 63 </ b> A are provided on the distal end side of the tubular member 63. Solder is inserted into the U-shaped groove 63 </ b> A when the tubular member 63 is fixed to the inner knitted tube 27.
Therefore, the distal end cap 65 is not fixed to the inner layer resin 28 by swaging, but is externally fitted to the tubular member 63 and fixed thereto. Accordingly, the inner diameter of the flexible tube connecting portion 65B of the tip cap 65 is constant unlike the first embodiment.

A method for manufacturing the insertion portion 61 will be described.
First, as shown in FIG. 12A, the inner layer knitted tube 27 is coated on the flex 26, and the distal end sides of each are integrated with solder to form a hard solder portion 66. Then, as shown in FIG. 12B, the tubular member 63 is inserted, and solder is poured into the U-shaped groove 63A and fixed at a predetermined position.

  Next, as shown in FIG. 12C, the inner layer resin 28 is coated from the outside of the inner layer knitted tube 27 including the tubular member 63 to form a flexible tube 62. The flexible tube 62 in this state is inserted into the outer knitted tube 18 as shown in FIG. And the front-end | tip part is cut | disconnected and it is set as the state shown in FIG.12 (e).

Subsequently, as shown in FIG. 12 (f), the short tube 25 is inserted into the outer side of the outer layer knitted tube 18 and is swaged and fixed at a predetermined position. The short tube 25 may be inserted before cutting the tip of the outer layer knitted tube 18.
Then, as shown in FIG. 12G, the outer layer knitted tube 18 and the inner layer resin 28 at the tip of the short tube 25 are cut away to expose the tip of the tubular member 63. As shown in FIG. 12 (h), a tip cap 65 is externally fitted and fixed to the exposed tubular member 63 by adhesion. Here, when a gap is generated between the tip cap 65 and the short tube 25, the adhesive G is used for repair bonding.

  According to the endoscope apparatus 60, the tubular member 63 and the tip cap 65 can be bonded and fixed, and the tip cap 65 can be fixed to the flexible tube 62 without being swaging fixed. Therefore, the overall amount of swaging work can be reduced.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the endoscope apparatus is an integrated type including not only an endoscope but also a monitor or the like, but it may be a separate type including only an endoscope.
Further, although the video scope having the image pickup device 13 in the distal end main body portion 15 is used, a fiber scope may be used.

  Furthermore, in 1st Embodiment, although the internal diameter of the front-end | tip base large diameter part 24Bb in the flexible tube connection part 24B of the front-end | tip base 24 is constant, not only this but as shown in FIG. A flexible tube connecting portion 71B and a tip cap 71 in which a plurality of jaw portions 70 are arranged may be used. In this case, since the jaw portion 70 bites into the inner layer resin 28, the tip cap 71 can be connected to the flexible tube 17 in a state where the airtightness is further improved.

  Further, as shown in FIG. 14, a female screw portion 72 may be arranged instead of the jaw portion 70. Even if the flexible tube connecting portion 73B and the tip cap 73 are used, the female screw portion 72 bites into the inner layer resin 28, so that the tip cap 73 can be connected to the flexible tube 17 in a more airtight state. .

  Also, the outer resin of the flexible tube and the inner layer resin 28 impregnated in the inner layer knitted tube 27 and the flex 26 are said to be integrated with the thermoplastic elastomer by melting or bonding, but the inner layer resin and the outer layer resin Or a different type of resin (for example, the inner layer resin may be a thermoplastic elastomer and the outer layer resin may be a thermosetting elastomer). Further, the outer layer resin may be fixed to the inner layer resin and the outer knitted tube as a thermosetting / vulcanized type having adhesiveness. Further, the inner layer resin is coated on the flex and inner layer knitted tube by extrusion molding, but the above-described structure may be formed by coating a tube-shaped resin. At this time, the inner layer knitted tube may not be used.

  At this time, by making the melting point of the outer layer resin lower than the melting point of the inner layer resin, it is possible to reduce the thinning of the inner layer resin by suppressing the impregnation of the inner layer resin with the outer layer resin and improve the reliability of the flexible tube. be able to. Moreover, the adhesive force between the inner layer resin and the outer layer resin can be increased by subjecting the inner layer resin or the inner layer resin and the outer layer knitted tube to a surface treatment such as UV cleaning or plasma treatment. Further, before the outer layer resin is coated, the outer layer resin may be coated by applying an adhesive resin (primer or the like) to the inner layer resin or the inner layer resin covered with the outer knitted tube. .

1 is an overall schematic diagram showing an endoscope apparatus according to a first embodiment of the present invention. 1 is an overall schematic diagram showing an insertion portion of an endoscope apparatus according to a first embodiment of the present invention. It is side surface sectional drawing which shows the front end side of the insertion part of the endoscope apparatus which concerns on the 1st Embodiment of this invention. It is side surface sectional drawing which shows the front end side of the insertion part of the endoscope apparatus which concerns on the 1st Embodiment of this invention. It is side surface sectional drawing which shows the rear end side of the insertion part of the endoscope apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the manufacture process of the front end side of the insertion part in the endoscope apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the manufacture process of the rear end side of the insertion part in the endoscope apparatus which concerns on the 1st Embodiment of this invention. It is side surface sectional drawing which shows the front end side of the insertion part of the endoscope apparatus which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the manufacture process of the front end side of the insertion part in the endoscope apparatus which concerns on the 2nd Embodiment of this invention. It is side surface sectional drawing which shows the front end side of the insertion part of the endoscope apparatus which concerns on the 3rd Embodiment of this invention. It is explanatory drawing which shows a part of the front end side of the insertion part of the endoscope apparatus which concerns on the 3rd Embodiment of this invention. It is explanatory drawing (sectional drawing) which shows the manufacturing process of the front end side of the insertion part in the endoscope apparatus which concerns on the 3rd Embodiment of this invention. It is side surface sectional drawing which shows the modification of the front end side nozzle | cap | die part in the insertion part of the endoscope apparatus which concerns on the 1st Embodiment of this invention. It is side surface sectional drawing which shows the modification of the front end side nozzle | cap | die part in the insertion part of the endoscope apparatus which concerns on the 1st Embodiment of this invention.

Explanation of symbols

1, 50, 60 Endoscopic devices 2, 51, 61 Insertion section 16 Bending section 17, 62 Flexible tube 18 Outer layer knitted tube 20 Tip side cap portion 24, 52, 65, 73, 71, 73 Tip cap 25 Short Tube 28 Inner layer resin (elastic member layer)
35 Rear end cap fixing part 38A First pipe part 38B Second pipe part 52BA Inner diameter side base 52BB Outer diameter side base 63 Tubular member

Claims (4)

A flexible tube having an elastic member layer; a bending portion that can be bent with respect to the flexible tube; an outer layer knitted tube that is flexible and braided to cover the flexible tube; and the bending portion In an endoscope apparatus comprising an insertion portion having a tubular distal end base portion connecting the distal end of the flexible tube to the distal end of the flexible tube,
The distal caps portion, and the short tube secured to said flexible tube and squeeze the tip of the outer knitted-like tube,
A distal end cap disposed on the flexible tube so as to be in the axial direction of the flexible tube and along the shape of the flexible tube exposed to the distal end side of the short tube. An endoscope apparatus. 2. The endoscope according to claim 1 , wherein the distal end base includes an inner diameter side base connected to the elastic member layer and an outer diameter side base fitted to the inner diameter side base. apparatus. The endoscope apparatus according to claim 1 , wherein a tubular member protruding from the elastic member layer to a distal end of the flexible tube is disposed. At the base end of the flexible tube, a rear end cap fixing portion for fixing the outer layer knitted tube to the flexible tube from the outside in the radial direction is arranged,
The rear end cap fixing part, a first pipe part for fixing the outer layer knitted pipe to the elastic member layer;
Provided side by side with respect to said first tubular portion in the axial direction of the flexible tube, one of claims 1 to 3, characterized in that it comprises a second tube portion connected to the elastic member layer The endoscope apparatus as described in any one.

Images