JP2002360509A - Endoscope having device for raising instrument for medical treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope having a device for raising an instrument for medical treatment which permits the exact and easy regulation of the effective length of a guide coil 12 for guiding a control wire. SOLUTION: This endoscope has a device for raising the instrument for medical treatment which is arranged with a control wire 11 for actuating a piece 3 for raising the instrument for medical treatment in the state of passing the inside of an insertion portion 1 and is fixed with both ends of the guide coil 12 for guiding the control wire 11 to a control section connected to the base end of the insertion portion 1 and the front end of insertion portion 1. The guide coil 12 is divided in its halfway position and the divided segments of the guide coil 12 are connected by a connecting mechanism 20 variable in its length in an axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having a treatment instrument raising device for controlling the direction in which the treatment instrument projects.

[0002]

2. Description of the Related Art In general, an endoscope having a treatment tool raising device has a treatment tool raising piece for controlling the projecting direction of a treatment tool protruding from the distal end of an insertion portion, which is disposed at the distal end of the insertion portion. An operation wire for operating the upper piece is arranged so as to pass through the insertion portion.

Such an operation wire is operated in an axial direction at an operation portion connected to a base end of the insertion portion, but a guide coil which becomes a tension when pulled from the operation portion side in the insertion portion. It is inserted and arranged inside.

[0004]

Both ends of the above-described guide coil are fixed to the distal end of the insertion portion and the operating portion by soldering or the like, so that the effective length of the guide coil is determined by the soldering position. Has become.

Therefore, in order for the guide coil to have the correct effective length, it is necessary to precisely fine-tune the soldering position on the operation unit side after fixing to the distal end side of the insertion unit.

However, since built-in components such as tubes and optical fiber bundles, various mechanisms, and the like are densely arranged around the solder fixing portion in such an operation portion, it is delicate without adversely affecting the surroundings. It is not easy to perform the soldering operation while performing the adjustment. In some cases, the member may be damaged, or the adjustment of the effective length of the guide coil may be insufficient.

Accordingly, an object of the present invention is to provide an endoscope having a treatment instrument raising device capable of accurately and easily adjusting the effective length of a guide coil.

[0008]

In order to achieve the above object, an endoscope having a treatment instrument raising device according to the present invention is provided with a treatment instrument control apparatus for controlling the direction in which the treatment tool projects from the distal end of the insertion section. The upper piece is arranged at the distal end of the insertion section, and the operation wire for operating the treatment instrument raising piece is arranged so as to pass through the insertion section, and both ends of the guide coil for guiding the operation wire are connected to the insertion section. In an endoscope having a treatment instrument raising device fixed to an operation portion connected to a base end and a distal end of an insertion portion, a guide coil is divided at an intermediate position, and a divided portion of the guide coil is extended in an axial direction. Are connected by a variable connection mechanism.

If the connecting mechanism is arranged inside the window formed in the connecting member for connecting the operating portion and the inserting portion, the adjusting operation is easy, and the connecting mechanism is provided at the divided end of the guide coil. A screw mechanism may be used in which the bases fixed to each are approached / separated in the axial direction by a member which is screwed with both of them.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows an endoscope, in which a distal end main body 2 having an objective optical system and the like is connected to a distal end of an insertion section 1 covered with a flexible tube.

A treatment instrument insertion channel (not shown) for inserting the treatment instrument 100 is inserted through the entire length of the insertion section 1, and the treatment instrument 100 that projects laterally from the distal end main body 2. A treatment instrument raising piece 3 for controlling the projecting direction of the distal end portion 100a is disposed in the distal end portion main body 2.

An operation wire 11 for operating the treatment instrument raising piece 3 has a distal end connected to the treatment instrument raising piece 3.
The base end is drawn out into the operation section 4 which passes through the insertion section 1 and is connected to the base end of the insertion section 1.

The operation wire 11 is disposed in the insertion portion 1 so as to be able to advance and retreat in the axial direction within a guide coil 12 in which, for example, a stainless steel wire is tightly wound with a constant diameter. It is fixed to the distal end body 2 and the operation unit 4.

With such a configuration, the operating wire 1 is operated by operating the treatment instrument raising piece operating lever 5 disposed on the operating section 4.
When the instrument 1 is advanced and retracted in the axial direction, the treatment instrument raising piece 3 operates, and the distal end portion 100 of the treatment instrument 100 from the distal end main body 2.
The projection direction of a can be arbitrarily controlled.

FIG. 1 shows a connecting portion 6 between the insertion portion 1 and the operation portion 4 during an assembling process.
a and the operation unit body 41 are fixedly connected by a cylindrical connection tube 61.

An operation section frame 42 is fixedly disposed in the operation section body 41. A base end cap 13 fixed to the base end of the guide coil 12 by soldering or the like is fixed to the operation section frame 42. It is fitted and fixed in the base receiving seat 43.

An outer cover 62 is provided on the connecting cylinder 61 so as to be movable in the axial direction. A window 61a having a large opening formed in the connecting cylinder 61 is assembled with the outer cover 62 after assembly.
Is to be closed by.

The guide coil 12 is divided into two parts by a portion located in the window 61a, and the divided parts of the guide coil 12 are connected by a connection mechanism 20 having a variable length in the axial direction. The divided guide coil 1
2 is 12A on the distal side and 12B on the proximal side.

FIG. 2 shows a portion where the guide coil 12 is fixed to the operation section frame 42 and a portion of the connection mechanism 20. In the guide coil 12, an insertion tube 14 made of, for example, a tetrafluoroethylene resin tube or the like is provided. The end portion 14 a is protruded from the base end cap 13 into the operation section 4. However, the insertion tube 14 does not necessarily have to be provided.

The operation wire 11 is inserted through the insertion tube 14, and its proximal end is disposed in the operation section 4 so as to be operated by the treatment instrument raising piece operation lever 5. (Not shown).

The connection mechanism 20 includes the distal guide coil 12
A and the screw caps 21A and 21B fixed to each of the base end side guide coil 12B by soldering or the like.
2 and screwed together.

On the outer peripheral surfaces of both screw bases 21A and 21B,
A right screw is screwed on one side and a left screw is screwed on the other. Both screw bases 21A and 21B are arranged so as to have a gap of about 1 cm in the axial direction.

On the inner peripheral surface of the screw cylinder 22, a center boundary portion 22 a where no screw is screwed is sandwiched, and both screw bases 21 are formed.
A right screw and a left screw to be screwed with A and 21B are screwed. Therefore, by rotating the screw cylinder 22 around the axis with respect to the two screw bases 21A and 21B, the two screw bases 21A and 21B can be approached / separated by an arbitrary length in the axial direction.

Therefore, in the step of connecting the insertion section 1 and the operation section 4, the effective length of the guide coil 12 is such that both ends are fixed to the distal end main body 2 and the operation section 4.
Connection mechanism 2 through window 61 a formed in connection cylinder 61
By adjusting 0, it is possible to adjust accurately and easily.

[0025]

According to the present invention, the guide coil for guiding the operation wire for operating the treatment instrument raising piece is divided at an intermediate position thereof, and the length of the divided portion of the guide coil is variable in the axial direction. By being connected by the connection mechanism, the effective length of the guide coil can be adjusted accurately and easily, and the connection mechanism is arranged inside the window formed in the connecting member connecting the operation section and the insertion section. Thus, it can be easily adjusted at any time during the assembly process of the endoscope or at the time of repair and inspection.

[Brief description of the drawings]

FIG. 1 is a partial side cross-sectional view during an assembling process of an endoscope having a treatment instrument raising device according to an embodiment of the present invention.

FIG. 2 is a side cross-sectional view of the vicinity of a base end portion of a guide coil of the endoscope having the treatment instrument raising device according to the embodiment of the present invention.

FIG. 3 is an external view of an endoscope according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion part 2 End part main body 3 Treatment tool raising piece 4 Operation part 6 Connection part 11 Operation wire 12 Guide coil 20 Connection mechanism 21A, 21B Screw base 22 Screw cylinder 61 Connection cylinder 61a Window 62 Exterior cover

Claims (3)

[Claims] A treatment instrument raising piece for controlling a projecting direction of a treatment instrument protruding from a distal end of an insertion portion is disposed at a distal end of the insertion portion, and an operation wire for operating the treatment instrument raising piece is provided. The treatment instrument is disposed so as to pass through the insertion portion, and both ends of a guide coil for guiding the operation wire are fixed to an operation portion connected to a base end of the insertion portion and a distal end of the insertion portion. An endoscope having an upper device, wherein the guide coil is divided at an intermediate position thereof, and the divided portions of the guide coil are connected by a connection mechanism having a variable length in the axial direction. An endoscope having a. 2. The endoscope having the treatment instrument raising device according to claim 1, wherein the connection mechanism is disposed inside a window formed in a connecting member that connects the operation section and the insertion section. . 3. The screw mechanism according to claim 1, wherein the connection mechanism is a screw mechanism for moving the base fixed to each of the divided ends of the guide coil in the axial direction by a member screwed to both ends. An endoscope having a treatment instrument raising device according to (1).