JP2015029764A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope in which an amount of water supply to an observation range is hardly restricted, the degree of freedom of setting of a water supply range is high, and sure and effective water supply to a target site is possible.SOLUTION: A raising base storage recess is recessed in the vicinity of a tip of an insertion part while turning an opening surface laterally, a tip of a treatment instrument conduit line is opened in the raising base storage recess, and a raising base is supported in the raising base storage recess so as to be raised and lowered. A tip of a water supply conduit line provided in the insertion part separately from the treatment instrument conduit line is opened in the raising base storage recess as a send-out port inclined in a direction approaching the opening surface of the raising base storage recess as approaching the tip of the insertion part. When the raising base is raised, the track of water supply sent from the send-out port of the water supply conduit line overlaps with the raising base, and the direction of water supply is changed with a water supply guiding surface of the raising base.

Description

  The present invention relates to an endoscope, and more particularly to an endoscope having a function of supplying water to an observation target at the distal end of an insertion portion of the endoscope.

  Some endoscopes have a so-called sub-water supply function that supplies water from the distal end of the insertion portion to the observation range to clean and color the target portion. The conventional sub-water supply function is a direct-view type in which the observation optical system observes the forward direction along the axial direction of the insertion portion because of the structure in which the pipe (channel) for auxiliary water supply opens forward at the tip of the insertion portion. The endoscope is provided in an endoscope, and is not generally used for a side-view type endoscope in which an observation range by an observation optical system faces a side of an insertion portion. As an alternative to a dedicated auxiliary water supply function in a side-view type endoscope, it has been performed to supply water to a lateral observation site using a treatment instrument channel through which a treatment instrument is inserted. However, it is necessary to remove the treatment instrument from the treatment instrument channel at the time of water supply, and it takes time to use, and since it is not a pipe structure originally intended for water supply, it is difficult to effectively reach the target site. It was a problem.

  In Patent Document 1, in a side-view type endoscope, a configuration in which the direction of auxiliary water supply is determined using a treatment instrument raising mechanism for guiding a treatment instrument such as forceps inserted into a treatment instrument channel to a target site. Proposed. An example of this type of endoscope is shown in FIGS. The distal end rigid portion 60 that constitutes the distal end of the insertion portion of the endoscope is provided with an observation window 61 that faces laterally with respect to the axis of the insertion portion, and the observation optical system is indicated by M0 from the observation window 61 in the figure. A lateral range can be observed. The distal end rigid portion 60 is provided with an elevator base recess 62 that opens toward the observation range M0, and a treatment instrument raising mechanism 63 is provided in the elevator base recess 62. The treatment instrument raising mechanism 63 is pivotally attached to the raising base 63a by an axis orthogonal to the axis of the insertion portion, and the raising angle of the raising base 63a is changed by operating means provided in the operation part of the endoscope. Can be made. FIG. 10 shows an initial state where the raising base 63a is not raised, and FIG. 12 shows a state where the raising base 63a is raised to the maximum.

  A treatment instrument channel 64 is disposed as a conduit through which a treatment instrument such as forceps is inserted in the insertion portion, and the distal end of the treatment instrument channel 64 is open to the elevator storage recess 62. The treatment instrument inserted into the treatment instrument channel 64 enters the raising base accommodating recess 62 through the distal end opening of the treatment instrument channel 64, and the protruding direction from the raising base accommodating recess 62 is along the treatment instrument guide surface 63b of the raising base 63a. Determined.

  In addition to the treatment instrument channel 64, an auxiliary water supply channel 65 is disposed in the insertion portion. The tip of the auxiliary water supply channel 65 is embedded in the raising base 63a, and the outlet 63 that is continuous with the tip of the auxiliary water feeding channel 65 is formed inside the raising base 63a. The delivery port 66 passes through the lower side of the treatment instrument guide surface 63b in the elevator base 63a and opens at the front end of the elevator base 63a. The direction of the delivery port 66 changes in accordance with the change in the angle of the raising base 63a, whereby the direction of the secondary water delivered from the delivery port 66 via the secondary water supply channel 65 can be changed. The direction of the sub-water supply sent out from the outlet 66 at each angle of the elevator 63a is shown as a water supply track S0 in FIGS. An escape portion 63c that prevents interference with the auxiliary water supply channel 65 during the raising / lowering operation of the elevator 63a is formed in a portion of the elevator 63a where the auxiliary water supply channel 65 is embedded.

Japanese Patent Laid-Open No. 2001-389

  10 to 12, since the auxiliary water supply channel 65 and the outlet 66 that are auxiliary water supply pipes are passed through the raising base 63a, the diameter of the water supply pipe is likely to be restricted. If the diameter of the water supply conduit is small, the amount of water supply is small, and there is a possibility that a sufficient cleaning effect cannot be obtained when the target site is cleaned. In addition, when the raising base 63a is raised as shown in FIG. 12, the bending angle of the auxiliary water supply channel 65 inside the raising base 63a is increased, and the auxiliary water supply channel 65 is buckled or narrowed, resulting in a reduction in water supply performance. And loss of function may occur.

  Furthermore, when the outlet 66 is set so that the water supply trajectory S0 faces the observation range M0 with the elevator 63a raised as shown in FIG. 12, the initial stage in which the elevator 63a is not raised as shown in FIG. In this state, the water supply trajectory S0 deviates from the observation range M0, and water cannot be supplied to the target site in the observation range M0. When the elevator 63a is raised to the position shown in FIG. 11, the water supply trajectory S0 enters the front area of the observation range M0. However, in the angle range of the elevator 63a from the position shown in FIG. 11 to the maximum raising position shown in FIG. The water supply possible area with respect to the range M0 is narrow, and a large area in which the auxiliary water supply cannot reach within the observation range M0 remains.

  Based on the above awareness of the problem, the present invention makes it difficult to restrict the amount of water supplied to the observation range, and has a high degree of freedom in setting the water supply range, enabling reliable and efficient water supply to the target site. An object is to provide an endoscope.

  The present invention provides an elevator storage recess that is recessed in the vicinity of the distal end of the insertion portion with the opening surface facing sideways, and a treatment instrument conduit that is disposed in the insertion portion and has a distal end that opens into the elevation storage recess. The raising stand that is supported so as to be able to be tilted up and down around the axis perpendicular to the axis of the insertion portion in the raising stand housing recess, and determines the protruding direction from the raising stand housing recess of the treatment instrument inserted into the treatment instrument conduit In this endoscope, a water supply conduit different from the treatment instrument conduit is provided in the insertion portion, and the tip of the water supply conduit approaches the opening surface of the elevator storage recess as it approaches the tip of the insertion portion. When the elevator is opened as an outlet that is inclined in the direction and the elevator is raised, the water supply trajectory delivered from the outlet of the water supply pipeline overlaps with the elevator, and the water supply of the elevator It is characterized by changing the direction of water supply by the guide surface.

  INDUSTRIAL APPLICABILITY The present invention is suitable for an endoscope having a side-viewing type optical observation section in which an observation window is directed in a direction in which the opening surface of the raising base storage recess opens, and in an initial state where the raising base is not raised, It is preferable that the water supply trajectory sent out from the optical path passes through the observation range of the optical observation unit without overlapping the elevator.

  In the state where the elevator is raised, the angle between the water supply trajectory delivered from the outlet and the water supply guide surface of the elevator is 90 degrees or more, which makes it easy to efficiently supply water to the target site. .

  By using the water supply guide surface of the elevator as a treatment instrument guide surface that determines the protruding direction of the treatment instrument from the elevator storage recess, water supply can be guided while keeping the elevator compact. Alternatively, in the raising stand, the position of the treatment instrument guide surface may be changed to form a water supply guide surface to facilitate simultaneous use of the treatment instrument and the auxiliary water supply function.

  An elevator housing recess having a rear wall having an opening at the distal end of the treatment instrument conduit, a pair of side walls located on both sides of the elevator base, and a bottom wall connecting the bottom portions of the pair of side walls and facing the opening surface On the other hand, it is preferable to arrange the outlet of the water supply pipeline so as to open to the rear wall and the bottom wall of the elevator housing recess.

  In the endoscope of the present invention, the outlet of the water supply pipe provided separately from the treatment instrument pipe in the insertion section is inclined in a direction approaching the opening surface of the elevator storage recess as it approaches the distal end of the insertion section. The direction of the water supplied from the outlet is changed by the water supply guide surface of the raised platform. According to this configuration, it is possible to secure the diameter of the water supply pipeline without being restricted by the internal structure of the elevator, while arbitrarily setting the water supply direction using the elevator, and by the operation of the elevator There is no risk of buckling or stenosis in the water pipe. Therefore, the amount of water supplied toward the observation range does not become insufficient, and the degree of freedom in setting the water supply range is high, so that reliable and efficient water supply to the target site can be realized.

It is a front view which shows the whole structure of an endoscope system. It is a connection diagram of an endoscope and an auxiliary water supply device. It is an endoscope of an embodiment to which the present invention is applied, and is a side view of a tip hard part of an insertion part when a raising stand of a treatment instrument raising mechanism is in an initial state. It is a sectional side view which follows the AA arrow line of FIG. FIG. 4 is a side view of the distal end hard portion of the insertion portion when the raising base is raised by the endoscope of FIG. 3. It is a sectional side view which follows the BB arrow line of FIG. It is a sectional side view which follows the BB arrow line of FIG. 5 which shows the state which raised the raising stand and performed water supply. In the endoscope of another embodiment in which the arrangement of the auxiliary water supply channels is different, it is a side sectional view of the distal end rigid portion of the insertion portion when the raising base is in the initial state. It is a cross-sectional view of the raising stand of another embodiment provided with the water supply guide surface for sub-water supply, and the treatment tool guide surface for treatment tools separately. FIG. 6 is a side sectional view of a distal end rigid portion of an insertion portion when water is supplied with a conventional endoscope in which a water supply pipeline is arranged inside the elevator in a state where the elevator is in an initial state. It is a sectional side view of the front-end | tip hard part of an insertion part when water supply is performed in the state which raised the raising stand to the middle with the same endoscope. It is a sectional side view of the tip rigid part of an insertion part when water supply is performed in the state which raised the raising stand to the maximum with the same endoscope.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The endoscope system shown in FIG. 1 has an endoscope 1 and a processor 2. The endoscope 1 is inserted into a patient's body to take an image, treat an affected area, and the like, and is detachably connected to the processor 2 via a connector 3. The endoscope 1 is an electronic endoscope that obtains an image signal by photoelectric conversion by an imaging device, and the processor 2 is an image processing circuit that processes the image signal sent from the endoscope 1 or illumination light to the endoscope 1. And a power supply circuit for supplying power to the endoscope 1 are incorporated. Although not shown in FIG. 1, an image observation monitor is connected to the processor 2, and an image processed by the processor 2 is observed on the monitor.

  The endoscope 1 includes a thin insertion portion 10 to be inserted into a patient's body, an operation portion 11 connected to a base portion of the insertion portion 10, and a universal tube 12 extending from the operation portion 11. A connector 3 is provided at the tip of the universal tube 12. The insertion portion 10 includes, in order from the front (in the order of insertion into the patient's body), the distal end rigid portion 13, the bending portion 14 bent by remote operation from the operation portion 11, and a flexible tube 15 having flexibility. have. When the operation knob 16 provided in the operation unit 11 is turned, the bending portion 14 is bent.

  As shown in FIG. 2, the endoscope system further includes an auxiliary water feeding device 4. The sub-water supply device 4 is operated by operating a pump button to send the liquid in the water supply bottle 5 to the sub-water supply tube 6, and the tip of the sub-water supply tube 6 is attached to the sub-water supply inlet 7 provided in the connector 3. Connected.

  3 to 7 show an embodiment of an endoscope according to the present invention. The distal end hard portion 13 of the insertion portion 10 is configured by covering the outer side of the hard main body portion 20 with a cap 21, and the main body portion 20 is provided with an elevator storage recess 22 facing the opening sideways. ing. A treatment instrument raising mechanism 23 is provided in the raising base accommodating recess 22, and an observation window 24 and an illumination window 25 are provided on the side portion of the raising base accommodating depression 22 so as to be displaced in the front-rear direction. The observation window 24 is an optical element located on the most object side in the observation optical system, and an imaging element (not shown) is provided at the rearmost part of the observation optical system. An image signal cable (not shown) is connected to the substrate that supports the image sensor. The illumination window 25 is an optical element located closest to the object side in the illumination optical system, and an exit end face of a light guide fiber (not shown) is located behind the illumination window 25. The image signal cable and the light guide fiber are arranged from the insertion unit 10 through the operation unit 11 to the universal tube 12, and are connected to the processor 2 through the connector 3. The image signal cable sends an image signal obtained by photoelectric conversion by the imaging device to an image processing circuit in the processor 2, and the light guide fiber supplies illumination light from the light source device in the processor 2 to the illumination window 25. In the endoscope 1 of the present embodiment, the observation window 24 constituting the observation optical system and the illumination window 25 constituting the illumination optical system are substantially orthogonal to the axis of the distal end rigid portion 13 (insertion axis of the insertion portion 10). This is a side-view type endoscope that faces the direction, and the observation range in the front-rear direction by the observation optical system is indicated by M1 in FIGS.

  In the insertion portion 10, a treatment instrument channel (treatment instrument duct) 30, an air / water feeding channel 31, and an auxiliary water feeding channel (water feeding duct) 32 are arranged as independent pipes. The treatment instrument channel 30 is connected to the treatment instrument insertion port 17 (FIG. 1) provided in the operation unit 11, and the distal end is opened to the raising base accommodating recess 22, so that a treatment instrument such as forceps can be connected to the treatment instrument insertion port 17. It can be inserted and guided to the elevator storage recess 22.

  The air / water supply channel 31 is connected to an air / water supply device (not shown), and the front end opens behind the observation window 24 and the illumination window 25 (FIGS. 3 and 5). When the air / water supply button 18 provided in the operation unit 11 is operated, air or liquid is sent from the air / water supply device into the air / water supply channel 31 and is sent out from the front end opening of the air / water supply channel 31. Air supply and water supply from the front end opening of the air / water supply channel 31 are used to clean the observation window 24 and the illumination window 25 and to remove water droplets.

  The auxiliary water supply channel 32 is arranged from the universal tube 12 to the insertion part 10 through the operation unit 11, and the base end on the universal tube 12 side is connected to the auxiliary water supply inlet 7 (FIG. 2) of the connector 3 and inserted. The tip on the part 10 side is connected to the elevator storage recess 22 via a delivery port (water supply conduit) 33 described later. By operating the auxiliary water supply device 4, the liquid is sent from the water supply bottle 5 through the auxiliary water supply tube 6 into the auxiliary water supply channel 32, and water is supplied from the outlet port 33. The water supply via the auxiliary water supply channel 32 is referred to as auxiliary water supply. The auxiliary water supply is used for cleaning blood, dirt, etc. attached to the observation site by the observation optical system.

  The treatment instrument raising mechanism 23 is a structure in which a raising base 23b is pivotally attached by a shaft 23a in the raising base accommodating recess 22, and the raising base 23b has a deep groove-shaped (concave) guide surface (water feeding guide surface, treatment). A tool guide surface 23c is formed. The raising base 23 b is positioned in front of the distal end opening of the treatment instrument channel 30, and when a treatment instrument (not shown) inserted into the treatment instrument channel 30 is pushed into the riser storage recess 22 from the treatment instrument insertion port 17, The instrument abuts on the guide surface 23c of the elevator 23b, and the direction in which the treatment instrument protrudes from the elevator storage recess 22 is determined by the guide surface 23c. The raising base 23b can be moved up and down about the shaft 23a from the initial state shown in FIGS. 3 and 4 to the maximum raising position shown in FIGS. 5 and 6, and according to the angle change of the raising base 23b. The protruding direction of the treatment tool changes. The raising / lowering operation mechanism of the raising base 23b provided in the operation part 11 is well-known, The illustration is abbreviate | omitted.

  The elevator storage recess 22 is a recess that is open and recessed toward the side of the distal rigid portion 13 (in the upward direction of the elevator 23b), and the distal ends of the treatment instrument channel 30 and the auxiliary water supply channel 32 open. A rear wall 22a, a pair of side walls 22b extending from the rear wall in the axial direction of the tip rigid portion 13 and positioned on both sides of the elevator base 23b, a bottom wall 22c connecting the bottoms of the pair of side walls 22b, and a bottom wall 22c A front wall 22d that is positioned forward and constitutes the most distal portion of the distal end rigid portion 13, and a portion facing the bottom wall 22c is an opening surface 22e that is open toward the side of the distal end rigid portion 13. ing.

  As shown in FIG. 4, the guide surface 23 c of the elevator base 23 b has an opening surface 22 e from the bottom wall 22 c side of the elevator base recess 22 toward the distal end side of the insertion portion 10 in an initial state where the elevator base 23 b is not raised. There is a slope in the direction to the side. As the elevator base 23b is raised, the inclination angle of the guide surface 23c with respect to the axis of the insertion portion 10 gradually increases, and when the elevator base 23b is raised to the maximum as shown in FIGS. 23c approaches the rear wall 22a of the elevator storage recess 22 and opposes it.

  The treatment instrument channel 30 and the auxiliary water supply channel 32 are respectively disposed in the insertion portion 10 in a direction along the axis of the insertion portion 10, and in the distal end rigid portion 13, in the depth direction of the elevator storage recess 22. The auxiliary water supply channel 32 is located at a position shallower than the treatment instrument channel 30 (position close to the opening surface 22e). As shown in FIG. 3 and FIG. 5, the positional relationship in the lateral width direction of the elevator 23 b is that the auxiliary water supply channel 32 is located behind the deepest portion of the guide surface 23 c (substantially the center in the lateral width direction of the elevator 23 b). ing.

  As shown in FIGS. 4, 6, and 7, the front end portion of the auxiliary water supply channel 32 connected to the elevator storage recess 22 is closer to the rear wall 22 a (the front end side of the insertion portion 10) from the bottom wall 22 c side. It is connected to a delivery port 33 that is inclined so as to proceed toward the opening surface 22e. Therefore, the reference water supply trajectory S1 (FIG. 4), which is the sub-water supply trajectory delivered from the sub-water supply channel 32, is headed obliquely forward with the delivery port 33 extended. In the initial state (FIGS. 3 and 4) of the treatment instrument raising mechanism 23 in which the raising table 23b is not raised, the raising table 23b is not positioned on the reference water supply path S1, and the auxiliary water supply from the auxiliary water supply channel 32 is not performed. It proceeds along the reference water supply trajectory S1 without changing the direction. The reference water supply trajectory S1 is set so as to pass through the observation range M1 by the observation optical system, and particularly through the forefront region of the observation range M1.

  5 to 7 show a state where the raising base 23b is raised to the maximum. Due to the raising operation, the raising base 23b approaches the rear wall 22a, and the raising base 23b advances on the reference water supply track S1 so that the reference water supply track S1 and the guide surface 23c intersect each other. Then, as shown in FIG. 7, the water supply along the reference water supply trajectory S1 hits the guide surface 23c of the elevator 23b, changes its direction, and is sent out on the maximum startup water supply trajectory S2 along the guide surface 23c. The maximum raising water trajectory S2 is within the observation range M1 by the observation optical system, and is set so as to pass through an area close to the end of the observation range M1.

  When the raising base 23b is raised at an angle smaller than the maximum raising angle, the direction of the guiding surface 23c changes according to the raising angle, and according to the angle change of the raising base 23b (the guiding surface 23c). Thus, the sub-water supply trajectory can be set in any direction from the reference water supply trajectory S1 to the maximum rising water supply trajectory S2. As a condition for reliably setting the sub-water supply direction by the guide surface 23c, an angle θ formed by the direction D1 (FIG. 6) of the reference water supply track S1 and the extending direction D2 (FIG. 6) of the guide surface 23c. If (FIG. 6) is smaller than 90 degrees, there is a risk that smooth water supply along the guide surface 23c may be hindered, so the angle θ is preferably 90 degrees or more. In the present embodiment, the angle θ is larger than 90 degrees even at the maximum rising angle in FIG. 6 where the angle θ is the smallest in the movable range of the raising base 23b, and effective water feeding is performed in any direction of the observation range M1. be able to.

  FIG. 8 shows another embodiment in which a sub-water supply channel (water supply conduit) 132 is disposed on the lower side of the treatment instrument channel 30 (the side closer to the bottom wall 22c of the elevator base recess 22). The outlet (water supply conduit) 133 continuing to the tip of the auxiliary water supply channel 132 is opened on the bottom wall 22c in the vicinity of the shaft 23a of the treatment instrument raising mechanism 23, and the reference water supply trajectory S11 in which the outlet 133 is extended. Is inclined obliquely forward from the bottom wall 22c side of the elevator base recess 22 toward the opening surface 22e. FIG. 8 shows an initial state in which the elevator 23b is not raised. At this time, the reference water supply trajectory S11 passes through the observation range M1 by the observation optical system, and particularly passes through a region near the forefront of the observation range M1. Is set to When the elevator 23b is raised from the state of FIG. 8, the elevator 23b advances on the reference water supply track S11, and the direction of the auxiliary water supply along the reference water supply track S11 is changed by the guide surface 23c of the elevator 23b. Can do. As the raising angle of the raising base 23b is increased, the sub-water feeding direction approaches the rear of the observation range M1. Even in this embodiment, it is possible to make the auxiliary water supply reach most of the observation range M1 by using the raising operation of the raising base 23b while securing a sufficient amount of water passing through the auxiliary water supply channel 132 and the outlet 133. .

  As described above, in the endoscope to which the present invention is applied, the auxiliary water supply channels 32 and 132 and the outlets 33 and 133 are provided only in the main body portion 20 in the distal end rigid portion 13 of the insertion portion 10, and the treatment instrument raising mechanism In the initial state where the elevator 23b of 23 is not raised, the reference water supply trajectories S1 and S11 sent from the outlets 33 and 133 are positioned within the observation range M1 and guided by the raising operation of the elevator 23b. The water supply trajectory is changed by the sub-water supply hitting the surface 23c. According to this configuration, since the auxiliary water supply channels 32 and 132 and the outlets 33 and 133 are not disposed in the raising base 23b, the diameters of these pipes are not easily restricted, and the raising base 23b is moved up. Occasionally, there is no possibility of narrowing or buckling of the auxiliary water supply channels 32, 132 and the outlets 33, 133. Furthermore, water can be supplied into the observation range M1 even when the elevator 23b is not raised, and a wide water supply possible area within the observation range M1 can be secured. Therefore, reliable water supply to the target site can be performed without a shortage of water supply.

  In each of the embodiments described above, the guide surface 23c is used as a surface to which the secondary water supply is applied when the direction of the secondary water supply is changed using the elevator 23b. Therefore, when the secondary water supply function is used, the treatment tool is provided on the guide surface 23c. It is desirable to make the state where no is placed. However, in the case of performing auxiliary water supply from the use state of the treatment instrument, it is not necessary to pull out the entire treatment instrument from the treatment instrument channel 30, and it is only necessary to slightly pull the treatment instrument so that the treatment instrument does not protrude into the raising base accommodating recess 22.

  As a different embodiment, a water supply guide surface 41 that guides sub-water supply and a treatment instrument guide surface 42 that guides a treatment tool may be provided individually, such as a raising base 40 whose cross-sectional shape is shown in FIG. In this embodiment, since the auxiliary water supply can be applied to the water supply guide surface 41 while placing the treatment instrument on the treatment instrument guide surface 42, the treatment instrument and the auxiliary water supply function can be used simultaneously.

  As mentioned above, although demonstrated based on illustration embodiment, this invention is not limited to embodiment. For example, the endoscope of the embodiment has a side-view type observation optical unit as an observation means, but in addition to this, the endoscope can be applied to an endoscope having an ultrasonic probe for obtaining an ultrasonic tomographic image at the distal end of the insertion unit. It is. Further, the present invention can also be applied to an endoscope provided with a perspective observation optical unit that observes obliquely forward with respect to the axis of the insertion unit. Even in such a perspective-type endoscope, by applying the present invention, reliable and efficient water supply to the target site in the observation range can be realized.

DESCRIPTION OF SYMBOLS 1 Endoscope 2 Processor 3 Connector 4 Sub-water supply apparatus 5 Water supply bottle 6 Sub-water supply tube 7 Sub-water supply inlet 10 Insertion part 11 Operation part 12 Universal tube 13 Tip rigid part 14 Bending part 15 Flexible tube 16 Operation knob 17 Treatment tool Insertion port 18 Air supply / water supply button 20 Main body 21 Cap 22 Raising base storage recess 22a Rear wall 22b Side wall 22c Bottom wall 22d Front wall 22e Opening surface 23 Treatment instrument raising mechanism 23a Shaft 23b Raising base 23c Guiding surface (water feeding guiding surface, Treatment instrument guide surface)
24 Observation window 25 Illumination window 30 Treatment instrument channel (treatment instrument pipeline)
31 Air / Water Channel 32 132 Sub-Water Channel (Water Pipe Line)
33 133 Outlet (water pipe)
40 Raising stand 41 Water supply guide surface 42 Treatment instrument guide surface M1 Observation range S1 S11 Reference water supply track S2 Maximum startup water supply track

Claims (7)

An elevator storage recess recessed in the vicinity of the distal end portion of the insertion portion with the opening surface facing sideways,
A treatment instrument conduit that is disposed in the insertion portion and has a distal end that opens into the elevator storage recess;
The treatment instrument that is supported so as to be able to be tilted up and down around the axis perpendicular to the axis of the insertion section in the raising base storage recess, and the protruding direction of the treatment instrument inserted through the treatment instrument conduit from the raising base storage depression A platform to decide,
In an endoscope having
A water supply conduit different from the treatment instrument conduit is provided in the insertion portion, and the tip of the water supply conduit is inclined in a direction approaching the opening surface of the elevator storage recess as it approaches the tip of the insertion portion. As an outlet to be opened in the above-mentioned elevator storage recess,
When the raising base is raised, the water supply trajectory delivered from the outlet of the water supply pipe line overlaps with the raising base, and the direction of water supply is changed by the water supply guide surface of the raising base. Endoscope. The endoscope according to claim 1, further comprising a side-viewing type optical observation unit in which an observation window is directed in a direction in which the opening surface of the elevator storage recess is opened,
An endoscope in which the trajectory of water delivered from the delivery port passes through the observation range of the optical observation unit without overlapping the riser in an initial state where the elevator is not raised. The endoscope according to claim 1 or 2, wherein an angle formed between a water supply trajectory sent from the outlet and the water supply guide surface in the elevator is 90 degrees or more in a state where the elevator is raised. Endoscope that is. The endoscope according to any one of claims 1 to 3, wherein the water supply guide surface of the raising base is also used as a treatment instrument guiding surface that determines a projecting direction of the treatment tool from the raising base housing recess. Endoscope. The endoscope according to any one of claims 1 to 3, wherein the water supply guide surface of the elevator is positioned with respect to a treatment instrument guide surface that determines a protruding direction of the treatment instrument from the elevator storage recess. Endoscope formed on the above-mentioned raising base by making it different. The endoscope according to any one of claims 1 to 5, wherein the raising base accommodating recess includes a rear wall where a distal end of the treatment instrument conduit is opened, and a pair of side walls located on both sides of the raising base. And a bottom wall that connects the bottoms of the pair of side walls and faces the opening surface, and the delivery port opens to the rear wall of the elevator storage recess. The endoscope according to any one of claims 1 to 5, wherein the raising base accommodating recess includes a rear wall where a distal end of the treatment instrument conduit is opened, and a pair of side walls located on both sides of the raising base. And a bottom wall that connects the bottoms of the pair of side walls and faces the opening surface, and the delivery port opens to the bottom wall of the elevator storage recess.

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