JP2009284939A - Distal end hood with treatment instrument raising device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distal end hood with a treatment instrument raising device for an endoscope, capable of controlling the direction of projection of a treatment instrument by smoothly turning a treatment instrument guide hole through which the distal end of the treatment instrument projecting from a treatment instrument projection hole passes even if the distal end hood is pressed on the mucus membrane, etc., and capable of controlling the direction of projection of the treatment instrument for a universal endoscope in which a function for controlling the direction of projection of the treatment instrument is not incorporated. <P>SOLUTION: A treatment instrument guide ring 24 having the treatment instrument guide hole 23 through which the distal end of the treatment instrument 100 passes is fitted and disposed in the inner surface of a distal end hood tube 21 in such a way as rotatable around the axis, and a flexible treatment instrument guide ring driving shaft 28 for controlling the direction of the treatment instrument guide ring 24 by rotationally driving the treatment instrument guide ring 24 from the proximal end side of an insertion part 11 is disposed to extend rearward from the distal end hood tube 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a distal end hood with a treatment instrument raising device for an endoscope that is detachably attached to the distal end of an insertion portion of the endoscope.

The endoscope distal end hood is generally formed in a cylindrical shape that opens forward, and is projected from the distal end of the insertion section of the endoscope by rotating the distal end hood around the axis. Some have an additional function capable of controlling the orientation of the treatment tool (for example, Patent Document 1).
Japanese Patent Laid-Open No. 54-88681 FIGS. 5 and 6 etc.

  In the distal end hood with a treatment instrument raising device for an endoscope described in Patent Document 1, a distal end hood itself is formed with a treatment instrument guide portion through which a distal end portion of the treatment instrument protruded from the treatment instrument projection port passes. The protrusion direction of the treatment instrument can be changed by rotating the entire tip hood in the direction around the axis at the tip of the insertion portion.

  However, in the body, the tip hood tends to be pressed against the mucous membrane, etc. As a result, the tip hood cannot rotate smoothly, and it cannot be done when trying to change the protruding direction of the treatment instrument. May end up.

  Further, in the invention described in Patent Document 1, since the drive shaft for rotationally driving the tip hood is incorporated in the endoscope, a dedicated endoscope incorporating such a driving operation shaft is incorporated. Can only be used with a mirror.

  The present invention controls the projection direction of the treatment instrument by smoothly rotating the treatment instrument guide hole through which the distal end portion of the treatment instrument projected from the treatment instrument projection port passes even when the distal end hood is pressed against the mucous membrane or the like. In addition, a general-purpose endoscope that does not incorporate a function for controlling the protruding direction of the treatment tool can control the protruding direction of the treatment tool. An object is to provide a tip hood with an upper device.

  In order to achieve the above object, a distal end hood with a treatment instrument raising device for an endoscope of the present invention is a tube in which a distal end hood tube that is detachably attached to the distal end of an insertion portion of the endoscope opens forward. The distal hood cylinder is provided with a treatment instrument guide means for changing the direction of the distal end portion of the treatment instrument that is formed in a shape and projects forward from the treatment instrument projection port formed on the distal end surface of the insertion portion. In a distal hood with a treatment instrument raising device of an endoscope, a distal hood cylinder is attached to the distal end of the insertion portion so as not to rotate, and a distal end portion of the treatment instrument that protrudes from the treatment instrument projection port passes as a treatment instrument guide. A treatment instrument guide ring provided with a treatment instrument guide hole is fitted and disposed on the inner peripheral part of the distal end hood cylinder so as to be rotatable in the direction around the axis, and the treatment instrument guide ring is driven to rotate from the proximal end side of the insertion part. Flexible process to control the direction Ingredients guide ring drive shaft, are those extending located rearward from the front end hood tube.

  The treatment instrument guide ring may be detachably attached to the tip hood tube. In that case, a step portion having a small inner diameter on the tip side is formed on the inner peripheral surface of the tip hood tube. When the hood tube is attached to the distal end of the insertion portion, the treatment instrument guide ring is loosely sandwiched between the stepped portion and the distal end surface of the insertion portion, and the distal hood tube is removed from the distal end of the insertion portion. In this state, the treatment instrument guide ring may be detachable backward from the tip hood cylinder.

  Further, the treatment instrument guide ring may be rotated by a treatment instrument guide ring drive shaft via a gear mechanism, and the treatment instrument guide ring drive shaft is rotationally driven from the base end side by a reversible motor. You may be made to do.

  According to the present invention, the treatment instrument guide ring having the treatment instrument guide hole through which the distal end portion of the treatment instrument protruded from the treatment instrument projection port passes is rotatable in the direction around the axis on the inner peripheral portion of the distal end hood tube. A flexible treatment instrument guide ring drive shaft for rotating and controlling the direction of the treatment instrument guide ring from the proximal end side of the insertion portion extends rearward from the distal end hood tube and is arranged to be fitted and arranged. Therefore, even when the distal end hood is pressed against the mucous membrane or the like, the treatment instrument guide hole can be smoothly rotated to control the projection direction of the treatment instrument, and in addition, the projection direction of the treatment instrument can be controlled. Even a general-purpose endoscope in which the above function is not incorporated can control the protruding direction of the treatment instrument.

  A distal end hood cylinder that is detachably attached to the distal end of the insertion portion of the endoscope is formed in a cylindrical shape that opens forward, and projects forward from a treatment instrument projection port formed on the distal end surface of the insertion portion. In a tip hood with a treatment tool raising device for an endoscope in which a treatment tool guide means for changing the direction of the tip portion of the treatment tool is provided on the tip hood tube, the tip hood tube cannot be rotated at the tip of the insertion portion. A treatment instrument guide ring provided with a treatment instrument guide hole through which the distal end portion of the treatment instrument protruded from the treatment instrument projection port passes as a treatment instrument guide means is attached to the inner periphery of the distal end hood tube in the direction around the axis. A flexible treatment instrument guide ring drive shaft for rotating and fitting the treatment instrument guide ring from the proximal end side of the insertion portion and controlling the direction thereof extends from the distal end hood cylinder to the rear. It is arranged out.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a state in which a distal end hood 20 with a treatment instrument raising device that is detachable from the endoscope 10 is attached to the endoscope 10, and a distal end portion of the treatment instrument 100 projects forward therefrom. FIG. 2 is a plan sectional view, FIG. 3 is a front view, and FIG. 4 is a perspective view. However, FIG. 2 shows a combined cross section of the axial position of the treatment instrument insertion channel 14.

  Reference numeral 11 denotes a flexible insertion portion of the endoscope 10, and an observation window 13 is disposed on the distal end surface of the distal end portion main body 12 connected to the distal end thereof as shown in FIGS. 3 and 4. . Illustrations of an illumination window and an air / water supply nozzle arranged alongside the observation window 13 are omitted.

  As shown in FIG. 1 and FIG. 2, a treatment instrument insertion channel 14 made of a flexible tube is inserted through the entire length of the insertion portion 11, and a treatment instrument projection port 14 o serving as an outlet thereof is a distal end portion main body 12. It opens to the front surface of the front. The treatment instrument protrusion 14o is formed at a position near the periphery that is displaced with respect to the center of the distal end surface of the distal end main body 12.

  The distal end hood 20 with the treatment instrument raising device is detachable with respect to the endoscope 10, and FIG. 5 shows a state where the distal end hood 20 with the treatment instrument raising device is not attached to the endoscope 10. . The tip hood cylinder 21 that is detachably attached to the tip portion main body 12 is formed in a substantially cylindrical shape that opens forward by an elastic material.

  Since the latter half portion (the portion on the right side in each drawing) of the tip hood cylinder 21 is formed to have a size that allows the outer periphery of the tip portion main body 12 to be elastically tightened. As shown in FIG. 1 and FIG. 2, the tip hood tube 21 can be attached so as to cover the outer periphery of the tip portion main body 12.

  In this state, the retaining protrusion 22 formed so as to protrude inwardly on the inner peripheral surface of the rear end of the front end hood cylinder 21 is recessed in the outer peripheral surface of the front end main body 12. , The distal end hood tube 21 is fixed to the distal end main body 12 in a state where it cannot move in either the axial direction or the axial direction. However, the tip hood tube 21 may be fixed to the tip portion main body 12 so as not to rotate by other means.

  If the rear end portion of the front end hood tube 21 is elastically deformed with a strong force of a certain level or more from the state in which the front end hood tube 21 is attached to the front end portion body 12, the retaining protrusion 22 is removed from the engagement recess 15 and As shown in FIG. 5, the tip hood tube 21 can be removed from the tip portion main body 12.

  A treatment instrument guide ring 24 (treatment instrument guide means having a treatment instrument guide hole 23 through which the distal end portion of the treatment instrument 100 projected from the treatment instrument projection port 14o passes in the inner peripheral portion of the intermediate portion of the distal end hood cylinder 21. ) Is fitted and arranged so as to be rotatable around the axis, and the treatment instrument guide ring 24 is rotated to displace the treatment instrument guide hole 23, thereby changing the protruding direction of the distal end portion of the treatment instrument 100. Can do.

  The treatment instrument guide ring 24 is formed in a cylindrical shape as a whole as shown in FIG. 6 alone, and the treatment instrument guide hole 23 is formed in the plate-like portion 25 formed so as to block a part of the distal end surface. And a gear groove 26 is partially formed on the outer periphery of the treatment instrument guide ring 24. However, the gear groove 26 may be formed on the entire circumference.

  As shown in FIG. 1 and FIG. 5, a step portion 21a having a small inner diameter on the tip side is formed on the inner peripheral surface of the tip hood cylinder 21, and as shown in FIG. In a state where the hood cylinder 21 is attached to the distal end body 12, the treatment instrument guide ring 24 is loosely sandwiched between the stepped portion 21 a and the distal end surface of the distal end body 12. In this state, the treatment instrument guide ring 24 is rotatable in the direction around the axis, and movement in the axis direction is restricted by the step portion 21 a and the distal end surface of the distal end main body 12. Therefore, it is preferable to perform a frictional resistance reduction process or the like for improving slipping on the stepped portion 21a and the distal end surface of the distal end main body 12 or the like.

  Further, as shown in FIG. 5, in the state where the distal end hood tube 21 is detached from the distal end portion main body 12, the treatment instrument guide ring 24 is detachable rearward from the distal end hood tube 21, and as shown in FIG. In addition, the treatment instrument guide ring 24 can be easily separated from the distal end hood cylinder 21, and the distal end hood cylinder 21 and the treatment instrument guide ring 24 can be easily and individually cleaned and disinfected.

  As shown in FIG. 5 and FIG. 8 illustrating the VIII-VIII cross section, a gear mechanism 27 that meshes with the gear groove 26 of the treatment instrument guide ring 24 is built in the side wall portion of the distal end hood cylinder 21, A flexible treatment instrument guide ring drive shaft 28 for controlling the direction of the treatment instrument guide ring 24 by rotationally driving the treatment instrument guide ring 24 with the gear mechanism 27 extends from the distal end hood tube 21 to the rear. .

  The treatment instrument guide ring drive shaft 28 is inserted and disposed over the entire length in a flexible guide tube 29 that is rotatable in the direction around the axis. The gear mechanism 27 may be a single gear or a gear group in which a plurality of gears are engaged.

  FIG. 9 shows the operation unit 15 connected to the proximal end of the insertion unit 11. The operation unit 15 is provided with a treatment instrument insertion port 14i that is an inlet of the treatment instrument insertion channel 14, a reversibly rotatable motor 16 for rotating the treatment instrument guide ring drive shaft 28 from the base end side, and the like. Yes.

  Reference numeral 17 denotes a push button switch for rotating the motor 16 in the forward direction. Reference numeral 18 denotes a push button switch for rotating the motor 16 in the reverse direction. Both of them are of the type in which the motor 16 rotates only while being pushed in with a fingertip. .

  As a result, by appropriately pressing the two push button switches 17 and 18, the treatment instrument guide ring 24 is rotated in an arbitrary direction by an arbitrary angle and stopped via the treatment instrument guide ring drive shaft 28. Can do. However, a mechanism for manually rotating the treatment instrument guide ring drive shaft 28 may be provided instead of the motor 16.

  10 and 11 are a front view and a plan sectional view showing a state in which the protruding direction of the distal end portion of the treatment instrument 100 protruding forward from the treatment instrument protrusion port 14o is controlled by the treatment instrument guide ring 24, When the treatment instrument guide ring 24 is rotationally driven in the distal end hood tube 21 as shown by A, the treatment instrument guide hole 23 formed in the treatment instrument guide ring 24 rotates to pass through it. The direction of the distal end portion of the treatment instrument 100 is changed to an obliquely forward left direction as indicated by an arrow B.

  Further, when the treatment instrument guide ring 24 is driven to rotate in the reverse direction, the protruding direction of the treatment instrument 100 is changed to the diagonally forward direction as indicated by a two-dot chain line, and the push button switches 17 and 18 are appropriately operated. Therefore, it can be in a stationary state at any position in between.

  Thus, by rotating the treatment instrument guide ring 24 in the distal hood cylinder 21, the treatment instrument guide hole 23 is rotated, and the protruding direction of the distal end portion of the treatment instrument 100 can be changed. Even when the tube 21 is pressed against the mucous membrane surface or the like, the protruding direction of the treatment instrument can be reliably controlled.

  Since it is necessary to return the treatment instrument guide hole 23 to the original position when the treatment instrument 100 is pulled out, for example, when the two push button switches 17 and 18 are pressed simultaneously, such control is performed. It is convenient if you put it. Or you may provide the 3rd pushbutton switch (not shown) etc. for performing such control.

It is side surface sectional drawing of the state which the front end hood with the treatment tool raising apparatus of the endoscope of the Example of this invention was attached to the endoscope, and the treatment tool protruded. 1 is a plan sectional view of a state in which a distal end hood with a treatment instrument raising device for an endoscope of an embodiment of the present invention is attached to an endoscope and a treatment instrument protrudes. It is a front view of the state where the tip hood with the treatment instrument raising device of the endoscope of the embodiment of the present invention is attached to the endoscope and the treatment instrument protrudes. It is a perspective view in the state where the front end hood with the treatment instrument raising device of the endoscope of the embodiment of the present invention is attached to the endoscope and the treatment instrument protrudes. It is side surface sectional drawing of the front end hood with the treatment tool raising apparatus of the endoscope of the Example of this invention. It is a single perspective view of the treatment instrument guide ring of the embodiment of the present invention. It is side surface sectional drawing of the state from which the treatment tool guide ring was removed from the front hood with a treatment tool raising apparatus of the endoscope of the Example of this invention. It is VIII-VIII sectional drawing in FIG. 5 of the Example of this invention. 2 is a schematic side view of an operation unit of an endoscope according to an embodiment of the present invention. FIG. It is a front view which shows the protrusion direction control state of the treatment tool by the front hood with the treatment tool raising device of the endoscope of the embodiment of the present invention. It is a top sectional view showing the projection direction control state of the treatment tool by the tip hood with the treatment tool raising device of the endoscope of the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Endoscope 11 Insertion part 12 Tip part main body 13 Observation window 14 Treatment tool insertion channel 14o Treatment tool protrusion 15 Operation part 16 Motor 17, 18 Pushbutton switch 20 Tip hood with treatment tool raising device 21 Tip hood cylinder 21a Stage 23 treatment instrument guide hole 24 treatment instrument guide ring (treatment instrument guide means)
26 gear groove 27 gear mechanism 28 treatment instrument guide ring drive shaft 29 guide tube 100 treatment instrument

Claims (5)

A distal end hood cylinder that is detachably attached to the distal end of the insertion portion of the endoscope is formed in a cylindrical shape that opens forward, and protrudes forward from a treatment instrument projection port formed on the distal end surface of the insertion portion. In the tip hood with a treatment tool raising device for an endoscope provided with a treatment tool guide means for changing the direction of the tip portion of the treatment tool provided in the tip hood cylinder,
A treatment instrument provided with a treatment instrument guide hole through which the distal end portion of the treatment instrument protruded from the treatment instrument projection port passes as the treatment instrument guide means. A guide ring is fitted and disposed on the inner peripheral portion of the distal hood cylinder so as to be rotatable in the direction around the axis, and the treatment instrument guide ring is rotationally driven from the proximal end side of the insertion portion to control its direction. A distal end hood with a treatment instrument raising device for an endoscope, characterized in that a flexible treatment instrument guide ring drive shaft is extended rearward from the distal end hood tube.   The distal end hood with a treatment instrument raising device for an endoscope according to claim 1, wherein the treatment instrument guide ring is detachably attached to the distal end hood tube.   In a state where a step portion having a small inner diameter on the tip side is formed on the inner peripheral surface of the tip hood tube, and the tip hood tube is attached to the tip of the insertion portion, the treatment instrument guide ring is connected to the step portion. When the distal end hood tube is removed from the distal end of the insertion portion, the treatment instrument guide ring is detached from the distal end hood tube rearward. The distal end hood with a treatment instrument raising device for an endoscope according to claim 2, which is free.   The tip hood with a treatment instrument raising device for an endoscope according to any one of claims 1 to 3, wherein the treatment instrument guide ring is rotationally driven by the treatment instrument guide ring drive shaft via a gear mechanism.   The distal end hood with a treatment instrument raising device for an endoscope according to claim 4, wherein the treatment instrument guide ring drive shaft is rotationally driven from a proximal end side by a reversibly rotatable motor.

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