JP6704872B2 - Endoscope and method of mounting optical system in endoscope - Google Patents

Description

The present invention relates to an endoscope and a method for attaching an optical system in the endoscope, and more particularly, to an upright position for accommodating an optical system accommodating portion for accommodating a side-viewing type optical system and a treatment instrument stand at the distal end portion of the insertion portion. The present invention relates to a technique for attaching an optical system to an endoscope in which a table housing portion is arranged adjacent to the endoscope.

In the endoscope, various treatment tools are inserted into a treatment tool insertion opening provided in the operation unit, and are guided out from a treatment tool outlet opening on the upper surface side of the distal end portion for use in treatment and inspection. For example, a duodenal endoscope has a catheter or the like, and an ultrasonic endoscope has a puncture needle or the like. In addition, treatment tools such as forceps and snares are used. In such a treatment tool, it is necessary to change the lead-out direction at the distal end portion in order to treat and inspect a desired position in the subject, and therefore, the treatment tool and the guide wire are placed in the upright stand accommodating portion formed at the distal end portion. A treatment tool stand for standing up is provided.

In an endoscope such as a duodenoscope, at the distal end portion of the insertion portion, an optical system storage portion for storing a side-viewing type optical system and an upright stand accommodating portion for accommodating a treatment tool stand are provided at the tip end axis. It is arranged adjacent to a position orthogonal to the core direction.

To attach a side-view optical system to the tip of an endoscope, generally, a signal cable of an image pickup unit and a light guide for illumination are provided from an attachment opening formed on the side of the tip. The base end side is inserted into the cable insertion path, and the lens barrel of the image pickup unit and the mouthpiece of the light guide are respectively attached to the two attachment holes formed on the upper surface (the upper surface of the tip end portion) of the optical system storage section.

However, the tip portion of the endoscope is originally small (thickness is, for example, 5 mm to 10 mm), and the space of the optical system storage portion provided therein is also small.

Furthermore, as described above, the optical system storage unit that stores the side-view optical system and the standing base storage unit that stores the treatment instrument stand are arranged adjacent to each other, and the space of the optical system storage unit is It gets smaller and smaller. It is difficult to attach the image pickup unit and the light guide to the attachment holes through the optical system storage portion having such a small space.

Furthermore, the signal cable is composed of a composite multi-core cable and is inserted through the entire length of the insertion portion of the endoscope. Therefore, the signal cable may be strongly pushed and pulled each time the insertion portion is bent, and the signal cable may be peeled off or disconnected from the connection portion with the substrate which is a component of the imaging unit.

As a measure to prevent this peeling and disconnection, the cable portion near the substrate of the signal cable is hardened with a fixing agent such as an adhesive or a sealing agent, and the flexibility of the fixing portion becomes small. It is difficult to route the signal cable when mounting it in the mounting hole.

In particular, the side-view optical system has an observation field on the side and rear side of the tip, so that the lens barrel of the imaging unit and the mouthpiece of the light guide are inserted diagonally rearward from the conventional vertical insertion into the mounting hole. You have to tilt it in. For this reason, it is necessary to position the imaging unit at an appropriate position in the optical system storage portion, but if the fixing portion has a small flexibility, it becomes difficult to perform appropriate positioning.

By the way, in Patent Document 1, in an ultrasonic endoscope in which an array-shaped ultrasonic transducer in which a plurality of electric cables are connected to a distal end hard portion and an observation optical system are respectively mounted, an ultrasonic endoscope in the distal end hard portion is It is disclosed that a first holder that holds a sound wave oscillator and a second holder that holds an observation optical system are dividably connected to each other. As a result, even if the optical fiber bundle such as the light guide and image guide of the observation optical system is damaged by the bending operation of the endoscope, the expensive ultrasonic transducer fixed integrally with the optical fiber bundle is replaced. Instead, only the optical fiber bundles can be replaced, so that the cost at the time of repair can be reduced.

JP 62-275438 A

As in Patent Document 1, the tip of the endoscope can be divided into two members, a first holder that holds an ultrasonic transducer and a second holder that holds an observation optical system. So, it may be possible to replace only the optical fiber bundle. However, even if the tip portion can be divided, it is difficult to prevent damage to the imaging unit body and disconnection of the light guide when the optical system is attached to the attachment hole.

In particular, when the cable portion near the substrate of the signal cable is hardened with a fixing agent such as an adhesive or a sealant and the fixing portion has a small flexibility, the image pickup unit main body when the optical system is attached to the mounting hole is It is more difficult to prevent breakage and breakage of the light guide.

The present invention has been made in view of such circumstances, and an endoscope capable of preventing the image pickup unit from being damaged or the light guide being broken when the image pickup unit and the light guide are attached to the distal end portion. Another object of the present invention is to provide a method for attaching an optical system in an endoscope.

In order to achieve the object, the endoscope of the present invention has a distal end portion of an insertion portion, an optical system accommodating portion for accommodating a side-viewing type optical system, and a treatment instrument standing upright on the treatment instrument lead-out opening side of the distal end portion. In an endoscope including an image pickup unit and a light guide, an upright stand accommodating portion for accommodating a stand is disposed adjacent to a position orthogonal to the axial direction of the distal end portion. Body block formed with a cable insertion passage communicated with the main body and a treatment instrument insertion passage communicated with the upright stand accommodating portion, and is detachably attached to the main body block, and the axial direction of the distal end portion with respect to the main body block A movable block that is slidable on the movable block, and the movable block has a frame body that constitutes a part of the outer shell surface of the tip portion, and the frame body has an open side surface on the upright stand housing side, and the frame body Mounting holes for mounting the lens barrel of the image pickup unit and the mouthpiece of the light guide are formed on the upper surface of the moving block, which is the surface on the side of the treatment instrument outlet opening.

According to the endoscope of the present invention, the signal cable and the light guide can be easily routed when the lens barrel of the imaging unit and the mouthpiece of the light guide are attached to the attachment holes. Therefore, since an unreasonable force is not applied to the image pickup unit and the light guide, problems such as damage to the image pickup unit and disconnection of the light guide can be prevented.

In another aspect of the present invention, the main body block forms a partition wall that separates the optical system storage section and the upright stand storage section, and a bottom surface that is connected to the partition wall and that faces the upper surface of the optical system storage section on the moving block side. And a bottom portion having a U-shaped cross section in a direction orthogonal to the axial direction of the portion.

In another aspect of the present invention, a first guide portion is formed in one of the moving block and the main body block, and the other block is engaged with the first guide portion and A first engaging portion that allows the moving block to slide is formed.

The first guide portion or the first engaging portion may be formed at the end of the bottom surface of the main body block opposite to the partition wall.

In another aspect of the present invention, a second guide portion is formed in one of the moving block and the main body block, and the second guide portion is engaged with the other block, and the second guide portion is engaged with the main body block. It is possible to adopt a mode in which a second engaging portion that allows the moving block to slide is formed.

One of the second guide portion and the second engaging portion is formed on the partition wall upper portion which is a position on the partition wall of the main body block on the side of the treatment instrument lead-out opening portion, and the other is opposed to the partition wall upper portion of the moving block. It is possible to adopt a mode in which it is formed at the position where

In another aspect of the present invention, one of the moving block and the main body block is provided with an engaging projection, and the other block is provided with an engaging hole for fitting with the engaging projection. be able to.

In another aspect of the present invention, one of the moving block and the body block may be provided with a screw, and the other block may be provided with a screw hole to be screwed into the screw.

In another aspect of the present invention, a sealing agent may be coated on a contact surface portion between the moving block and the main body block when the moving block is attached to the main body block.

In another aspect of the present invention, an observation window is provided in a mounting hole to which a lens barrel of the imaging unit is attached, and an observation window is cleaned on an upper surface of the main body block side, which is a surface of the main body block on the treatment instrument lead-out opening side. A mode in which an air/water nozzle is provided, and the tip end surface of the air/water nozzle is located in the vicinity of a contact line at which the upper surface of the moving block on the moving block side and the upper surface of the main body block on the main body block contact each other when the moving block is mounted on the main body block. Can be taken.

In another aspect of the present invention, the tip portion may have a tip portion main body and a cap detachably attached to the tip portion main body, and the tip portion main body may be configured by a body block and a moving block. ..

In order to achieve the object of the method for attaching an optical system in an endoscope of the present invention, an optical system storage portion for storing a side-viewing optical system and a treatment tool lead-out opening side of the distal end portion are provided at the distal end portion of the insertion portion. An upright stand accommodating section for accommodating a treatment tool stand that stands upright is disposed adjacent to a position orthogonal to the axial direction of the distal end, the optical system includes an imaging unit and a light guide, and the distal end is an optical unit. A main body block in which a cable insertion passage communicated with the system storage portion and a treatment tool insertion passage communicated with the upright base storage portion are formed, and a shaft of a tip end portion detachably attached to the main body block. An optical system mounting method for mounting an imaging unit and a light guide to a distal end portion using an endoscope having a movable block slidable in a core direction, in which the movable block is slid in a direction away from a main body block. And the signal cable of the imaging unit with the lens barrel of the imaging unit and the base of the light guide positioned near the tip of the moving block after sliding. An inserting step of inserting the light guide from the exposed portion into the cable insertion passage of the main body block, and an attaching step of attaching the lens barrel of the image pickup unit and the base of the light guide to the respective attaching holes formed in the moving block, Slide the moving block in the direction to attach it to the main unit block and push the signal cable and the light guide into the cable insertion path while sealing the moving block upright stand housing side and storing the imaging unit and light guide in the optical system housing. And a fixing step of fixing the moving block and the main body block.

By performing the method of attaching the optical system in the endoscope of the present invention, it is possible to prevent the image pickup unit from being damaged or the light guide being broken when attaching the image pickup unit and the light guide to the distal end portion.

According to the endoscope and the method of attaching the optical system in the endoscope of the present invention, it is possible to prevent the imaging unit from being damaged or the light guide from being broken when the imaging unit and the light guide are attached to the distal end portion. You can

Overall configuration diagram of an endoscope equipped with a treatment instrument stand and peripheral devices A perspective view showing an example of a side-viewing type imaging unit. The perspective view which expanded and showed the front-end|tip part of a side view type endoscope. Perspective view of the tip with the cap removed, seen from diagonally above Exploded perspective view of the tip Perspective view of moving block before mounting optical system removed from main unit block Perspective view illustrating a moving block Step flow diagram for attaching the optical system to the tip Perspective view of insertion process in step flow The perspective view which looked at the insertion process from the stand base accommodation part side of the moving block. The perspective view which looked at the attachment process from the stand base part side of the moving block. Explanatory drawing explaining the front-end|tip part of the endoscope of contrast contrasted with the endoscope of this invention. Schematic diagram of attaching an optical system to the tip of a proportional endoscope

Hereinafter, preferred embodiments of an endoscope and a method for attaching an optical system in the endoscope according to the present invention will be described with reference to the accompanying drawings.

The present invention will be described by the following preferred embodiments. Modifications can be made in many ways without departing from the scope of the invention, and other embodiments other than this embodiment can be used. Therefore, all the modifications within the scope of the present invention are included in the claims.

Here, in the drawings, the parts indicated by the same symbols are the same elements having the same functions. Further, in the present specification, when the numerical range is represented by "-", the numerical values of the upper limit and the lower limit indicated by "-" are included in the numerical range.

[Endoscope]
FIG. 1 is an overall configuration diagram of an endoscope and peripheral devices according to the present embodiment.

As shown in FIG. 1, the endoscope 1 is mainly connected to an insertion portion 2 to be inserted into the body of a patient (subject) and a base end of the insertion portion 2 so as to grasp and insert the endoscope 1. The operation unit 3 used for operating the unit 2 and the like.

Then, the endoscope 1 is connected to the processor device 15 and the light source device 19 which are peripheral devices via the universal cord 4, and the processor device 15 and the monitor device 17 are connected.

The processor device 15 supplies power to the endoscope 1 via a cable inserted in the universal cord 4, controls the drive of the image pickup unit 16 (see FIG. 2) provided at the distal end portion 7, and at the same time, the image pickup unit. An image pickup signal transmitted via 16 signal cables 21 (see FIG. 2) is received, and various signal processing is performed on the received image pickup signal to convert it into image data. The image data converted by the processor device 15 is displayed as an observation image (endoscopic image) on the monitor screen 17A of the monitor device 17 connected to the processor device 15 by a cable.

The light source device 19 supplies illumination light for imaging with the imaging unit 16 to the distal end portion 7 via the universal cord 4 and the light guide 43 (see FIG. 9) inserted in the endoscope 1.

FIG. 2 shows an example of the side-view type image pickup unit 16, which includes a lens barrel 25, a prism (not shown), a solid-state image pickup element 27, a substrate 28, a reinforcing frame 32, and a sealant 33 (for example, epoxy resin). The signal cable 21, the cable fixing portion 35, the protective tube 37 and the like. As the solid-state imaging device 27, for example, CCD (charge-coupled-devices) or CMOS (complementary metal-oxide-semiconductor) is used.

A multi-core cable is used as the signal cable 21, and includes a plurality of strands 39, a shield wire (not shown) that bundles these strands, and an outer cover 41 that covers the strands 39. Are soldered to the substrate 28. The plurality of strands 39 and the shield wire are surrounded by the reinforcing frame 32, and the narrowed narrowed portion on the substrate 28 side of the reinforcing frame 32 and the signal cable 21 are wound with a bundle thread (not shown), and then bonded. A thread winding portion is formed in which the signal cable 21 and the reinforcing frame 32 are integrally fixed by being fixed with an agent. Further, the sealant 33 is filled in the reinforcing frame 32. As a result, even if the signal cable 21 is strongly pushed and pulled each time the insertion portion 2 is bent, the signal cable 21 is less likely to be separated from the substrate 28, while the signal cable 21 near the substrate 28 is less flexible.

As shown in FIG. 1, the insertion portion 2 of the endoscope 1 is composed of a flexible portion 5, a bending portion 6, and a distal end portion 7 which are successively provided from the base end toward the distal end. The soft part 5 has flexibility and is curved in an arbitrary direction along the insertion path of the insertion part 2. The bending portion 6 is bent in the vertical and horizontal directions by operating the angle knobs 8 and 9 of the operating portion 3.

The distal end portion 7 takes an image of an observed region in the body through the observation window 18 (see FIG. 3) and sends the taken image as an observation image (endoscopic image) to the processor device 15 connected by the universal cord 4. Parts. In addition, an illumination unit for irradiating the observation site with illumination light propagated from the light source device 19 connected by the universal cord 4 through the light guide 43 inside the endoscope 1 is provided.

(Structure of the tip)
Next, the structure of the tip portion 7 will be described.

In the present embodiment, the case will be described in which the distal end portion 7 is composed of the distal end portion main body 30 and the cap 26 that is detachable from the distal end portion main body 30. However, the present invention is not limited to the case where the tip portion 7 has the cap 26, and includes a mode without the cap 26.

FIG. 3 is an enlarged perspective view of the distal end portion 7 with the cap 26 attached, and FIG. 4 is a perspective view of the distal end portion main body 30 with the cap 26 removed. Further, FIG. 5 is an exploded perspective view of the tip portion 7.

In the following description, as shown by the arrow indicating the direction of FIG. 5, the position on the tip side in the direction of the longitudinal axis Q (axis of FR-RE) of the tip portion 7 (axial direction) is the tip side. It is referred to as FR (or front FR), and the position on the side of the operation unit 3 is referred to as the proximal end RE (or the rear RE). Further, a position on the right hand side facing the front end direction of the tip portion 7 is called a right side RI, and a position on the left hand side is called a left side LE. Furthermore, the direction orthogonal to the plane including the intersecting axis where the axis of FR-RE and the axis of RI-LE intersect is defined as the vertical direction of the distal end portion 7, and the side of the treatment instrument lead-out opening 29 described below is the upper side UP. The opposite side is called the lower side DW.

As shown in FIGS. 3 to 5, the distal end portion 7 has a distal end portion main body 30 (also referred to as a distal end hard portion) that divides the inside of the distal end portion 7 into a plurality of regions and integrally assembles various components. The outer peripheral portion of the tip portion main body 30 is covered with a removable cap 26 (see FIG. 5).

The tip portion main body 30 is formed of a rigid member such as a metal material having corrosion resistance, and the cap 26 is formed of a material having an elastic force, for example, elastic rubber, in a shape based on a cylindrical shape with the tip end side closed.

As shown in FIG. 5, the cap 26 has an opening window 26</b>A that opens the entire opening 29 (treatment instrument lead-out opening 29) on the upper surface side of the upright stand housing portion 22 and a part of the upper side of the opening 36 on the front surface side. And a partition wall portion 26B that closes the entire opening portion 38 on the lower surface side of the upright stand housing portion 22 and a lower portion of the opening portion 36 on the front surface side.

An engaging portion (not shown) is formed at the base end of the cap 26 so as to project inward in the radial direction in an annular shape, and the engaging portion is a groove formed in the outer peripheral portion of the tip portion main body 30. By engaging with 31, the cap 26 is attached to the tip portion main body 30.

The tip portion main body 30 is formed by a base end wall portion 22C on the base end side and a pair of left and right side wall portions 22A, 22B extending from the base end wall portion 22C toward the tip end and facing each other. It is formed in a U shape when seen. As a result, in the distal end portion 7, between the right side wall portion 22B and the left side wall portion 22A, the upright stand accommodating portion 22 that is a space for accommodating the treatment instrument upright stand 24 is formed.

A standing lever housing chamber 40, which is a space for housing a standing lever 84 described later, is formed on the right side of the side wall portion 22B, and the above-described components of the observation unit and the illumination unit are arranged on the left side of the side wall portion 22A. An optical system storage portion 42, which is a space portion for storing a certain image pickup unit 16 and a light guide 43 (see FIG. 10), is formed. That is, the optical system storage section 42 and the upright stand storage section 22 are arranged adjacent to each other at a position orthogonal to the axial direction (longitudinal axis Q direction) of the distal end portion 7.

Note that the term “adjacent” here includes not only that there is nothing between them, but also includes the case where a partition wall 51 is provided between the optical system storage section 42 and the upright stand storage section 22, as described later. It means that a part of the tip end portion 7 has a relationship including the optical system storage portion 42 and the upright stand storage portion 22 in the same cross section orthogonal to the longitudinal axis Q direction.

The standing lever accommodating chamber 40 and the optical system accommodating portion 42 are covered with a protective plate (not shown) to maintain airtightness.

On the upper surface of the left side wall portion 22A of the pair of side wall portions 22A and 22B of the tip portion main body 30, the illumination window 20 is arranged in this order from the tip side, then the observation window 18 is arranged, and finally, the air and water supply. The nozzle 23 is arranged.

The illumination window 20 is a component of the illumination unit mounted on the tip portion 7, and receives the illumination light emitted from the light emitting portion provided at the end portion of the light guide 43 that propagates the light from the light source device 19. Irradiate the observation site.

The observation window 18 is a constituent element of an observation unit that acquires an image of an observation site existing laterally with respect to the longitudinal axis Q (direction orthogonal to the longitudinal axis Q). The subject light is captured by the imaging unit 16, which is another component of the observation section.

The air supply/water supply nozzle 23 can switch between air supply and water supply to the observation window 18 by operating the air supply/water supply button 10 (see FIG. 1) of the operation unit 3. In addition, a suction channel is connected to the treatment instrument insertion passage 14 (see FIG. 3) in the insertion portion 2, and the suction button 11 (see FIG. 1) of the operation portion 3 is operated to suction from the upright stand accommodating portion 22. Is done.

(Standing unit housing and treatment instrument stand)
Next, the upright stand accommodating section 22 and the treatment tool upright stand 24 provided in the upright stand accommodating section 22 will be described.

As shown in FIGS. 3 to 5, the treatment instrument stand 24 is formed in a tongue shape having a guide surface S that is recessed inward from the lower portion to the tip portion on the surface on the side for guiding a guide wire (not shown). To be done. That is, the treatment instrument stand 24 has a lower part in which a narrow groove 24A is formed at the center position in the width direction along the standing direction, and the narrow groove 24A is widened toward both sides to be narrowed again. It is composed of a central portion in which the narrowed wide groove 24B is formed and a tip portion in which the narrowed groove 24C is formed continuously from the wide groove 24B along the standing direction. The narrow groove 24A, the wide groove 24B, and the narrow groove 24C form the guide surface S of the guide wire, and the wide groove 24B is formed such that the cross section of the treatment instrument upright stand 24 in the width direction has a substantially inverted trapezoidal cube shape. It

The treatment tool stand 24 has a stand housing portion in which the treatment tool (not shown) or the guide wire guided to the stand housing portion 22 is bent by the standing operation of the standing lever 12 (see FIG. 1). It guides in the direction which goes to the treatment tool lead-out opening 29 on the upper surface side of 22, and guides a treatment tool or a guide wire from the treatment tool lead-out opening 29.

An outlet of the treatment instrument insertion passage 14 is formed at a lower portion of the base end wall portion 22C of the upright stand accommodating portion 22, and the treatment instrument introduction port 13 (of the operation portion 3 of the operation portion 3 is formed through the treatment instrument insertion passage 14 that is inserted through the insertion portion 2). (See FIG. 1). Then, the treatment instrument or the guide wire inserted from the treatment instrument introduction port 13 is guided to the upright stand accommodating portion 22 through the treatment instrument insertion passage 14.

In addition, a guide wire fixing portion 34 that fixes the guide wire with the treatment instrument stand 24 when the treatment instrument stand 24 is erected is provided on the upper portion of the base end wall portion 22C of the stand holder 22.

The guide wire fixing portion 34 is formed of a convex portion 34A that protrudes from the central portion in the width direction of the base end wall portion 22C and is tapered in the protruding direction. The convex portion 34A is formed in a substantially trapezoidal cubic shape with the base end wall portion 22C as the bottom surface. That is, the convex portion 34A of the substantially trapezoidal cube has a horizontal upper surface 34A1 that is tapered in the projecting direction, both side surfaces 34A2 inclined so as to intersect the projecting direction, and a lower surface 34A3 that is curvedly curved in the projecting direction. It is configured with a rectangular tip surface 34A4 where these four surfaces 34A1, 34A2, 34A3 intersect. It is preferable that the tip surface 34A4 has a rounded rectangular shape. Then, the convex portion 34A is formed in a shape corresponding to the substantially inverted trapezoidal cubic wide groove 24B formed in the central portion of the treatment instrument upright stand 24 described above. Thereby, when the treatment instrument stand 24 is raised and the convex portion 34A of the guide wire fixing portion 34 and the wide groove 24B of the treatment instrument stand 24 are aligned with each other, the wide groove 24B surrounds the convex portion 34A. ..

Therefore, when the guide wire led out from the treatment instrument lead-out opening 29 is locked to the guide surface S of the treatment instrument stand 24 and the treatment instrument stand 24 is raised, the guide surface of the treatment instrument stand 24 is shown. The guide wire can be sandwiched between the wide groove 24B of S and the convex portion 34A of the guide wire fixing portion 34. As a result, the guide wire can be reliably fixed at the center portion in the width direction of the treatment instrument stand 24. Further, the position where the guide wire is fixed becomes the maximum standing position of the treatment tool.

As shown in FIG. 5, in the upright stand accommodating portion 22, the opening portion on the upper surface side is the opening portion 29 (the treatment instrument lead-out opening portion 29) and the opening portion on the front surface side in the state in which the cap 26 is removed from the tip portion main body 30. The opening 36 has a portion as an opening portion and the opening portion on the lower surface side as an opening portion 38, and these opening portions 29, 36, 38 are connected in series so as to extend from the upper surface to the lower surface and open to the lower surface.

In addition, a holding hole 50 penetrating from the standing lever housing chamber 40 to the standing base housing portion 22 is formed near the lower end of the side wall portion 22B arranged on the right side of the standing base housing portion 22, and the holding hole 50 has a rotating shaft. 82 is rotatably supported.

In the present embodiment, the rotating shaft 82 is extended from the base end of the standing lever 84 that is integrally formed with the standing lever 84 and extends in the shape of a long plate, and one end is fixed to the standing lever 84 that is a standing stand rising mechanism. It has a fixed end and a free end at the other end, and is formed in a cantilever shape. A member having the rotating shaft 82 and the standing lever 84 extending in a direction substantially perpendicular to the axis of the rotating shaft 82 is referred to as a drive member 80, but the rotating shaft 82 and the standing lever 84 may be separate bodies. ..

Further, a seal member (not shown) is arranged between the rotary shaft 82 and the holding hole 50 to prevent gas and liquid from invading the upright stand accommodating portion 22 and the upright lever accommodating chamber 40. ..

The first shaft portion 90 of the rotary shaft 82 that projects into the upright stand accommodating portion 22 is fitted into the fitting hole 66 formed in the connecting portion 64 of the treatment tool upright stand 24, so that Link.

On the right side of the side wall 22B, a fan-shaped space centering on the holding hole 50 is formed as the standing lever storage chamber 40. In the standing lever housing chamber 40, the standing lever 84 of the driving member 80 is housed together with the rotation shaft 82 of the driving member 80 being inserted into the holding hole 50.

Then, the tip end of the operating wire (not shown) is coupled to the tip end of the standing lever 84 via a coupling tool (not shown). The operation wire is inserted into the insertion portion 2 through the wire insertion hole 44 (see FIG. 5) opened on the wall surface of the upright lever accommodating chamber 40, and is connected to the upright operation lever 12 of the operation portion 3.

As a result, the operation wire is pushed and pulled by the operation of the upright operation lever 12, and the upright lever 84 rotates together with the rotary shaft 82. Then, the rotation of the rotating shaft 82 causes the treatment instrument upright table 24 to rotate, and the treatment instrument upright table 24 performs an up-and-down motion. The raising mechanism for rotating the rotating shaft 82 is not limited to that of the present embodiment in which the raising lever 84 is pushed and pulled by the operation wire.

(Divided structure of the tip body)
Next, the divided structure of the tip body 30 will be described.

FIG. 6 is a perspective view of the moving block 30B removed from the main body block 30A. FIG. 7 is a perspective view of the moving block 30B slid in a direction away from the main body block 30A, as viewed obliquely from below.

6 and 7 show the state before the image pickup unit 16 and the light guide 43 are attached to the attachment holes 53 and 54.

As shown in FIGS. 6 and 7, the distal end portion main body 30 is formed with the cable insertion passages 45 and 47 that communicate with the optical system storage portion 42 and the treatment instrument insertion passage 14 that communicates with the upright stand storage portion 22. The main body block 30A and the movable block 30B that is detachably attached to the main body block 30A and is slidable in the axial direction (longitudinal axis Q direction) of the tip portion 7 with respect to the main body block 30A. That is, the tip portion main body 30 is formed into a structure that can be divided into a main body block 30A and a moving block 30B. In this case, it is preferable that the axial directions of the cable insertion passages 45 and 47 formed in the main body block 30A and the sliding direction of the moving block 30B be the same (parallel relationship).

As shown in FIGS. 6 and 7, the insertion opening 45A of the cable insertion passage 45 of the signal cable 21 among the cable insertion passages 45 and 47 is arranged on the upper side of the optical system storage portion 42, and the cable insertion passage of the light guide 43 is provided. An insertion opening 47A of 47 is arranged on the lower side of the optical system storage section 42.

Here, the moving block 30B is detachably attached to the main body block 30A means that the moving block falls off (disengages) from the main body block when the moving block 30B is slid in a direction away from the main body block 30A. It means that you can do it.

As shown in FIG. 6, the main body block 30A includes a base end side upper surface portion 49 that is an upper surface on the main body block 30A side that extends from the base end wall portion 22C of the distal end portion main body 30 to the vicinity of the observation window 18, and a base end portion. A partition wall 51 that extends from the end wall portion 22C to the tip position of the tip body 30 and separates the optical system storage portion 42 from the upright stand storage portion 22 and a bottom surface of the optical system storage portion 42 that is connected to the partition wall 51. The bottom surface portion 52 is formed and has a U-shaped cross section in a direction (RI-LE direction in FIG. 5) orthogonal to the axial direction of the tip portion 7. The bottom surface portion 52 is formed so as to face a tip-side upper surface portion 56 (movement block-side upper surface) of the moving block 30B, which will be described later, and extends from the base end wall portion 22C to the vicinity of the tip position of the tip portion main body 30.

In this way, by forming the bottom portion 52 having a U-shaped cross section in the optical system storage portion 42, the light guide 43 that is wired to the lower side of the optical system storage portion 42 of the signal cable 21 and the light guide 43. Will be settled better. This facilitates positioning of the signal cable 21 wired on the upper side of the optical system storage section 42.

In addition, the air/water nozzle 23 described above is provided on the base end side upper surface portion 49 which is the upper surface of the main body block side. In this case, when the moving block 30B is attached to the main body block 30A, the distal end side upper surface portion 56, which is the moving block side upper surface of the moving block 30B, and the base end side upper surface portion 49, which is the main body block side upper surface of the main body block 30A, contact each other. It is preferable that the tip end surface 23A of the air/water feeding nozzle 23 is located near the contact line L (see FIG. 4). As a result, the cleaning water or air ejected from the air/water supply nozzle 23 jumps over the contact line L and is ejected, so that the cleaning water or air does not hit the contact line L and the water sharpness does not deteriorate.

Here, the water sharpness refers to the cleaning performance by water supply and the water drop removal performance by air supply in cleaning the observation window 18 by the air/water supply nozzle 23.

Further, as shown in FIGS. 6 and 7, the moving block 30B has a frame body that constitutes a part of the outer shell surface of the distal end portion 7. Then, the side surface of the frame on the side of the upright stand accommodating portion 22 is opened, and the lens barrel 25 of the image pickup unit 16 and the light guide 43 (see FIG. 9) are provided on the upper surface which is the surface of the frame on the side of the treatment instrument outlet opening 29. Mounting holes 53 and 54 for mounting the cap 43A (see FIG. 9) respectively are formed.

That is, the frame body of the moving block 30B includes a leading end surface portion 55 forming a leading end surface of the optical system housing portion 42, and a leading end side upper surface portion 56 (moving block extending from the leading end surface portion 55 to a position near the end of the observation window 18). Upper surface) and a side surface portion 57 provided on the opposite side of the upright stand accommodating portion 22 so as to face the partition wall 51.

Therefore, the base end side upper surface portion 49 (main body block side upper surface) of the main body block 30A, the partition wall 51, and the bottom surface portion 52, the front end surface portion 55 and the front end side upper surface portion 56 (moving block side upper surface) that configure the frame body of the moving block 30B. ) And the side surface portion 57 form the left side wall portion 22A of the tip portion main body 30 described above.

As shown in FIG. 6, at the end of the bottom portion 52 of the main body block 30A, which has a U-shaped cross-section, on the side opposite to the partition wall 51, the slide of the moving block 30B with respect to the main body block 30A is guided. One guide portion 52A is formed. Further, as shown in FIG. 7, a first engaging portion 57A that engages with the first guide portion 52A is formed at the lower end of the side surface portion 57 of the moving block 30B.

The main block 30A may be provided with the first engaging portion 57A, and the moving block 30B may be provided with the first guide portion 52A.

Further, as shown in FIG. 6, a second guide portion 51A for guiding the slide of the moving block 30B with respect to the main body block 30A is formed above the partition wall 51, and as shown in FIG. 7, the partition wall 51 of the moving block 30B. A second engaging portion 56A that engages with the second guide portion 51A is formed at a position facing the upper portion.

The main body block 30A may be provided with the second engaging portion 56A, and the moving block 30B may be provided with the second guide portion 51A.

Specific examples of the first guide portion 52A and the first engaging portion 57A and specific examples of the second guide portion 51A and the second engaging portion 56A include, for example, a moving block 30B and a main body block 30A. A method in which a rail-shaped fitting groove is formed in one of the blocks and a rail-shaped fitting protrusion that engages with the fitting groove is formed in the other block can be adopted.

As a result, not only can the moving block 30B slide smoothly with respect to the main body block 30A, but also the first guide portion 52A, the first engaging portion 57A, the second guide portion 51A, and the second engaging portion 56A. Engagement also improves the sealing performance when the moving block 30B is attached to the main body block 30A.

Then, when the moving block 30B is slid in the direction away from the main body block 30A, the upright stand accommodating portion 22 side of the moving block 30B is exposed to the outside. Further, when the moving block 30B is slid in the direction in which the moving block 30B is mounted on the body block 30A, the standing block housing portion 22 side of the moving block 30B is sealed by the partition wall 51 of the body block 30A.

Further, as shown in FIGS. 6 and 7, one of the moving block 30B and the main body block 30A is provided with an engagement protrusion 58, and the other block is engaged with the engagement protrusion 58. A joint hole 59 is formed.

6 and 7, the engaging projection 58 is formed on the main body block 30A and the engaging hole 59 is formed on the moving block 30B, but the engaging hole 59 is formed on the main body block 30A and the moving block 30B is formed. The engagement protrusion 58 may be formed.

That is, the engaging projections 58 and the engaging holes 59 are formed at the positions where the moving block 30B and the main body block 30A face each other in the sliding direction, and when the moving block 30B is slid in the mounting direction to the main body block 30A. The engagement protrusion 58 and the engagement hole 59 are fitted together. Thereby, the moving block 30B is attached to the main body block 30A so that the moving block 30B and the main body block 30A are not displaced in the direction orthogonal to the axial direction of the tip portion 7 (RI-LE direction in FIG. 5). You can Therefore, the sealing performance of the tip body 30 can be improved.

In addition, as shown in FIGS. 6 and 7, one of the moving block 30B and the main body block 30A is provided with a screw 60, and the other block is provided with a screw hole 61 that is screwed into the screw 60. To be done. In FIGS. 6 and 7, a through hole 62 into which the screw 60 is inserted is formed in the lower end of the partition wall 51 of the main body block 30A, and the screw 60 is retained in the through hole 62, and the moving block 30B is projected to the lower part of the front end surface portion 55. The protruding portion 55A is formed with a screw hole 61 in which a female screw is engraved.

Alternatively, the partition wall of the main body block 30A may be provided with a screw hole 61, a through hole 62 for inserting the screw 60 may be formed in the moving block 30B, and the screw 60 may be held in the through hole 62.

As a result, the tip portion 7 can be easily disassembled and assembled, so that the work such as repair and replacement of parts becomes easy.

Although not shown, a sealant is coated on a contact surface portion between the moving block 30B and the body block 30A when the moving block 30B is attached to the body block 30A. Thereby, even if the tip portion 7 is divided into the main body block 30A and the moving block 30B, the watertightness of the tip portion 7 can be secured. Examples of the sealing agent include epoxy resin, epoxy acrylate, urethane acrylate, and silicone resin.

[How to attach the optical system to the endoscope]
Next, a method of attaching the lens barrel 25 of the imaging unit 16 and the base 43A of the light guide 43 to the attachment holes 53 and 54 of the distal end portion 7 of the endoscope 1 configured as described above will be described.

FIG. 8 is a step flow diagram showing the steps of the attachment method.

First, as shown by arrow A in FIG. 7, the moving block 30B is slid in a direction away from the main body block 30A to expose the upright stand housing portion 22 side of the moving block 30B to the outside (exposing step: S10).

Further, by sliding the moving block 30B in a direction away from the main body block 30A, the optical system housing portion 42 side (see FIG. 6) of the main body block 30A is exposed to the outside, and the insertion openings 45A of the cable insertion passages 45, 47 are provided. , 47A are exposed to the outside.

Next, as shown in FIGS. 9 and 10, with the lens barrel 25 of the imaging unit 16 and the base of the light guide 43 positioned near the tip of the moving block 30B after sliding, the signal cable of the imaging unit 16 is placed. 21 and the light guide 43 are inserted into the cable insertion passages 45 and 47 of the main body block 30A from the exposed portions (insertion step: S20).

Next, as shown in FIG. 11, the lens barrel 25 of the imaging unit 16 and the base 43A of the light guide 43 are attached to the attachment holes 53 and 54 formed in the moving block 30B (attachment step: S30).

9 to 11, components other than the lens barrel 25 of the image pickup unit 16 shown in FIG. 2 (for example, the substrate 28) are not shown.

In this mounting step, since the mounting holes 53 and 54 for mounting the lens barrel 25 of the imaging unit 16 and the base 43A of the light guide 43 are formed in the moving block 30B, the moving block 30B can be slid in the direction away from the main body block 30A. Thus, a long distance can be secured between the mounting holes 53, 54 and the insertion openings 45A, 47A of the cable insertion passages 45, 47. Furthermore, by sliding the moving block 30B in a direction away from the main body block 30A, the upright stand housing portion 22 side of the moving block 30B is exposed to the outside.

Accordingly, when the lens barrel 25 of the image pickup unit 16 and the base 43A of the light guide 43 are attached to the attachment holes 53 and 54, the signal cable 21 and the light guide 43 can be easily routed. Therefore, since the image pickup unit 16 and the light guide 43 can be attached to the attachment holes 53 and 54 so as not to exert an unreasonable force, the conventional problems such as the image pickup unit 16 being damaged or the light guide 43 breaking. Can be prevented.

Here, in order to compare with the endoscope 1 of the present invention, a case where the image pickup unit 16 and the light guide 43 are attached to the attachment holes 53 and 54 by using the contrastive endoscope 100 of FIG. 12 will be described.

The endoscope 100 of the comparative example shown in FIG. 12 is configured such that the side surface portion 102 of the tip portion main body 30 on the standing base housing portion 22 side can be detached to expose the optical system housing portion 42 to the outside. The holes 53 and 54 are provided in the tip body 30.

FIG. 13 is a schematic diagram in which the side surface portion 102 of the endoscope 100 of the comparative example shown in FIG. 12 is removed from the distal end portion main body 30 and the imaging unit 16 and the light guide 43 are attached to the attachment holes 53 and 54.

As shown in FIG. 13, since the side-view type optical system has an observation visual field on the side and rear side of the distal end portion 7, the lens barrel 25 of the imaging unit 16 is perpendicular to the mounting hole 53 (at the distal end portion). It must be inserted in a posture tilted obliquely backward with respect to the direction orthogonal to the axial direction). In order to obtain this posture, it is necessary to position the image pickup unit 16 as shown in FIG. 13 (hereinafter, referred to as ideal positioning).

However, actually, in a state where the signal cable 21 is inserted into the cable insertion passage 45, the image pickup unit 16 is positioned in a direction shown by a dotted line in FIG. 13 (hereinafter, actually referred to as positioning). In this case, if the opening diameter of the insertion port 45A of the cable insertion passage 45 is increased, the image pickup unit 16 can be placed in the ideal positioning, but the space of the optical system storage section 42 is narrow and impossible.

Therefore, it is necessary to change the image pickup unit 16 from the actual positioning to the ideal positioning, tilt the posture of the image pickup unit 16 rearward, and attach the lens barrel 25 to the attachment hole 53. However, the image pickup unit 16 is not flexible because the reinforcing frame 32 is applied to the connection portion of the signal cable 21 to the substrate 28 and is fixed with an adhesive. Further, since the distance between the mounting hole 53 and the insertion port 45A of the cable insertion passage 45 is short, it is difficult to handle the signal cable 21.

As a result, the image pickup unit 16 is forcibly changed from the actual positioning to the ideal positioning, so that an excessive force is applied to the image pickup unit 16 and the image pickup unit 16 is easily damaged.

Although the attachment of the base 43A of the light guide 43 to the attachment hole 54 is not as great as that of the image pickup unit 16, there is a similar problem and the light guide 43 is easily broken.

On the other hand, in the endoscope 1 of the present invention, the moving block is provided even when the reinforcing frame 32 is applied to the connection portion of the signal cable 21 to the substrate 28 and is fixed with the adhesive, which is not flexible. By sliding 30B in the direction away from the main body block 30A, it is possible to secure a long distance between the mounting hole 53 and the insertion port 45A of the cable insertion passage 45. As a result, the image pickup unit 16 can be easily moved to ideal positioning, so that the image pickup unit 16 can be prevented from being damaged when the image pickup unit 16 is attached to the attachment hole 53.

Further, the moving block 30B is slid in the direction away from the main body block 30A, so that the upright stand housing portion 22 side of the moving block 30B is exposed to the outside. This allows the signal cable 21 to be routed so that the imaging unit 16 can achieve ideal positioning in a state where the inflexible portion of the imaging unit 16 is pulled out from the exposed portion to the outside. Thereby, when the image pickup unit 16 takes the ideal positioning, the image pickup unit 16 is not subjected to an excessive force, so that the image pickup unit 16 can be prevented from being damaged.

Next, as shown by an arrow B in FIG. 7, the moving block 30B is slid in a direction to be attached to the main body block 30A, and the signal cable 21 and the light guide 43 are pushed into the cable insertion passages 45 and 47. The upright stand accommodating portion 22 side is sealed and the image pickup unit 16 and the light guide 43 are accommodated in the optical system accommodating portion 42 (accommodation step: S40).

In this storing step, since the sliding direction of the moving block 30B and the axial direction of the cable insertion passages 45 and 47 are the same, the signal cable 21 and the light guide 43 are connected to the cable insertion passages 45 and 47. It can be pushed in smoothly.

Next, the moving block 30B and the main body block 30A are fixed with screws 60 (fixing step: S50).

As a result, the work of attaching the imaging unit 16 and the light guide 43 to the tip portion 7 is completed. Therefore, by performing the method of attaching the optical system in the endoscope of the present invention, it is possible to prevent the imaging unit 16 from being damaged or the light guide 43 from being broken.

DESCRIPTION OF SYMBOLS 1... Endoscope 2... Insertion part 3... Operation part 4... Universal cord 5... Flexible part 6... Bending part 7... Tip part 8... Angle knob 9... Angle knob 10... Air supply/water supply button 11... Suction button 12... Standing up Operation lever 13... Treatment instrument inlet 14... Treatment instrument insertion passage 15... Processor device 16... Imaging unit 17... Monitor device 17A... Monitor screen 18... Observation window 19... Light source device 20... Illumination window 21... Signal cable 22... Stand Housing part 22A... Side wall part 22B... Side wall part 22C... Base end wall part 23... Air/water nozzle 23A... Tip surface 24... Treatment tool stand 24A... Narrow groove 24B... Wide groove 24C... Narrow groove 25... Lens barrel 26... Cap 26A... Opening window 26B... Partition part 27... Solid-state image sensor 28... Substrate 29... Opening on the upper surface side (treatment tool leading opening)
30... Tip body 30A... Body block 30B... Moving block 31... Groove 32... Reinforcement frame 33... Sealant 34... Guide wire fixing portion 34A... Projection 34A1... Top surface 34A2... Side surface 34A3... Bottom surface 34A4... Tip surface 35... Cable fixing part 36... Front side opening 37... Protective tube 38... Bottom side opening 39... Element wire 40... Standing lever housing chamber 41... Outer skin 42... Optical system housing 43... Light guide 43A... Base 44... Wire Insertion hole 45... Cable insertion passage 45A... Insertion port 47... Cable insertion passage 47A... Insertion port 49... Base end side upper surface portion (main body block side upper surface)
50... Holding hole 51... Partition wall 51A... Second guide portion 52... Bottom surface portion 52A... First guide portion 53... Mounting hole 54... Mounting hole 55... Tip surface portion 55A... Projection portion 56... Tip side upper surface portion (moving block) Side upper surface)
56A... 2nd engaging part 57... Side part 57A... 1st engaging part 58... Engaging protrusion 59... Engaging hole 60... Screw 61... Screw hole 62... Through hole 64... Connecting part 66... Fitting hole 80... Driving member 82... Rotating shaft 84... Standing lever 90... First shaft part 100... Endoscope 102... Side part A... Arrow B... Arrow DW... Lower FR... Tip side (front side)
L... Contact line LE... Left side Q... Longitudinal axis RE... Base end side (rear side)
RI... right side S... guide surface UP... upper side

Claims (12)

The distal end portion of the insertion portion includes an optical system storage portion for storing a side-viewing type optical system, and a standing base storage portion for storing a treatment instrument stand that stands upright on the treatment instrument lead-out opening side of the distal end portion. Is disposed adjacent to a position orthogonal to the axial direction of the, the optical system is an endoscope including an imaging unit and a light guide,
The tip is
A cable insertion path communicating with the optical system storage section and a cable insertion path through which the signal cable of the imaging unit and the light guide are inserted, and a treatment instrument insertion path communicated with the upright stand storage section are formed. The main body block,
A removable block that is detachably attached to the main body block and is slidable in the axial direction of the distal end portion with respect to the main body block;
The moving block has a frame body forming a part of the outer shell surface of the tip portion,
The side surface of the frame body on the side of the upright stand is open, and the movable block side upper surface of the frame body, which is the surface on the side of the treatment instrument lead-out opening side, has a lens barrel of the imaging unit and a base of the light guide. An endoscope having mounting holes for mounting and. The body block is
A partition wall for partitioning the optical system storage portion and the stand base storage portion,
A bottom surface that is continuously provided to the partition wall and forms a bottom surface facing the moving block side top surface of the optical system storage section, and has a U-shaped cross section in a direction orthogonal to the axial direction of the tip section; The endoscope according to claim 1, which has. A first guide portion is formed on one of the moving block and the main body block, and the other block is engaged with the first guide portion to move the moving block with respect to the main body block. The endoscope according to claim 2 , wherein a first engagement portion that allows the slide is formed. The endoscope according to claim 3, wherein the first guide portion or the first engagement portion is formed at an end portion of the bottom surface portion of the main body block opposite to the partition wall. A second guide portion is formed in either one of the moving block and the main body block, and the other block engages with the second guide portion to move the moving block with respect to the main body block. The endoscope according to any one of claims 2 to 4, wherein a second engaging portion that allows the slide is formed. One of the second guide portion and the second engagement portion is formed in the partition wall upper part of the partition wall of the main body block, which is the position on the side of the treatment instrument lead-out opening portion, and the other is the movable portion. The endoscope according to claim 5, wherein the endoscope is formed at a position facing the upper part of the partition wall of the block. 7. One of the moving block and the main body block is formed with an engagement protrusion on one of the blocks, and the other block is formed with an engagement hole for fitting with the engagement protrusion. The endoscope according to item 1. The screw is provided in any one of the moving block and the main body block, and the screw hole that is screwed into the screw is formed in the other block. Endoscope. The sealing agent is coated on a contact surface portion between the moving block and the main body block when the moving block is attached to the main body block. Endoscope. There is an observation window in the mounting hole for mounting the lens barrel of the imaging unit,
An air/water supply nozzle for cleaning the observation window is provided on an upper surface of the main body block side, which is a surface of the main body block on the side of the treatment instrument lead-out opening, and moves when the moving block is mounted on the main body block. 10. The internal view according to any one of claims 1 to 9, wherein a tip end surface of the air/water supply nozzle is located near a contact line where an upper surface of the block on the moving block side and an upper surface of the main body block on the main body block are in contact with each other. mirror. The tip is
Tip body,
A detachable cap on the tip body,
The endoscope according to any one of claims 1 to 10, wherein the tip portion main body is composed of the main body block and the moving block. The distal end portion of the insertion portion includes an optical system storage portion for storing a side-viewing type optical system, and a standing base storage portion for storing a treatment instrument stand that stands upright on the treatment instrument lead-out opening side of the distal end portion. The optical system includes an image pickup unit and a light guide, and the tip portion is a cable insertion path that communicates with the optical system storage portion and A main body block formed with a cable insertion passage through which the signal cable of the imaging unit and the light guide are inserted and a treatment tool insertion passage communicated with the upright stand accommodating portion, and detachably attached to the main body block, A distal end portion using an endoscope having a movable block slidable in the axial direction of the distal end portion with respect to a main body block and having a side surface on the side of the upright stand accommodating portion open. A method of attaching an optical system for attaching the imaging unit and the light guide to,
An exposing step in which the moving block is slid in a direction away from the main body block to expose the stand base side of the moving block to the outside;
With the lens barrel of the imaging unit and the base of the light guide positioned near the tip of the moving block after sliding, the signal cable and the light guide of the imaging unit are exposed from the exposed portion of the main body block. An insertion step of inserting into the cable insertion passage,
An attaching step of attaching the lens barrel of the imaging unit and the mouthpiece of the light guide to the respective mounting holes formed on the upper surface of the moving block which is the surface of the moving block on the side of the treatment instrument outlet opening .
The moving block is slid in a direction to be attached to the main body block, and the signal cable and the light guide are pushed into the cable insertion passage while hermetically closing the upright stand housing portion side of the moving block, and the imaging unit and the image pickup unit. A storing step of storing the light guide in the optical system storing section,
A method of mounting an optical system in an endoscope, comprising a fixing step of fixing the moving block and the main body block.

Images