JP2827778B2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope used for medical purposes or the like, and more particularly to an endoscope in which various functional members can be mounted on an insertion portion thereof.

[0002]

2. Description of the Related Art In general, an endoscope is provided with an insertion section for insertion into a body cavity or the like connected to a main body operation section, and an illumination window and an observation window are formed at the tip of the insertion section. It is for performing examination and diagnosis of a body cavity through an observation window below. Further, a treatment instrument insertion passage is provided so that cells can be collected, an affected part can be removed, and other treatments can be performed with the insertion portion inserted into the body cavity. The treatment instrument insertion passage has a treatment instrument introduction section provided in the main body operation section and a treatment instrument outlet port provided at the distal end of the insertion section, and is flexible between the treatment instrument introduction section and the treatment instrument exit port. A treatment instrument insertion channel formed of a tube having flexibility is interposed. Therefore, by inserting a treatment tool such as forceps from the treatment tool introduction portion,
The treatment instrument is passed through the treatment instrument insertion channel and protrudes outside from the treatment instrument outlet.

There are various types of treatment tools, such as forceps, a high-frequency knife, a high-frequency snare, an injection needle, a tube for supplying a contrast agent, and the like. Since the injection needle or tube has a uniform outer diameter as a whole, it must be used with an outer diameter smaller than the treatment instrument insertion channel. On the other hand, for a treatment tool such as a forceps, a control cable for opening and closing the operation mechanism is connected to an operation mechanism such as a gripping claw provided at the tip, and a base of the control cable is provided. The control cable is formed to be longer than at least the entire length of the treatment instrument insertion channel, and when the treatment instrument is inserted, the operation mechanism is passed through the treatment instrument insertion channel to allow the treatment cable to be inserted. The operation mechanism is configured to protrude from the outlet through a predetermined length, and an operation such as opening and closing of the operation mechanism is performed by remote operation by an operation unit located outside the treatment instrument introduction unit.

[0004]

Among the above-mentioned treatment tools, those having an operating mechanism at the distal end, such as forceps, for performing treatment such as removal of an affected part more efficiently. It is preferable to use a relatively large one. However, since the treatment tool is inserted through the treatment tool insertion channel, the operating mechanism is restricted by the inner diameter of the treatment tool insertion channel, and it cannot be increased in size in order to increase the efficiency of the treatment. become. In particular, in recent years, there has been a strong demand for reducing the diameter of the insertion portion from the viewpoint of reducing patient's pain and the like, and from this point as well, the size of the operating mechanism of the treatment tool is increasingly restricted. In addition, if various functional members other than the above-described treatment tools can be used for the endoscope, the accuracy of inspection, diagnosis, and the like can be improved. Not.

The present invention has been made in view of the above points, and an object of the present invention is to provide various functional members, including a treatment tool having a large operating mechanism ,
It is an object of the present invention to provide an endoscope which can be equipped with an operation section for remotely operating an operation mechanism section of a material .

[0006]

Means for Solving the Problems To achieve the above object, the present invention provides a device for inserting a treatment tool such as forceps into an insertion portion.
An endoscope having a discharge port at a distal end portion, and a treatment tool insertion passage having an introduction port in a main body operation section, wherein a diameter of the hole extends over a predetermined length from a treatment tool discharge port side of the treatment tool insertion path. Expansion
Then, a thread is formed on the inner surface of the portion where the hole diameter has increased.
Then, the treatment instrument insertion passage is connected to the screw
Connection ring for uniform inner surface shape
Different treatment functions by forming a functional step
A functional member with an operating mechanism
With and without a common distal end mounting part
Take the operating unit for operating by remote control the operating mechanism portion of the predetermined function member attached to the mounting portion is detachable
It is characterized in that a common operation unit side attachment portion to be attached is provided in the introduction port.

[0007]

[Function] As a treatment tool, for example, a forceps has an operating mechanism at its tip.
A functional member provided with gripping claws and the like as
The operating mechanism of the material is operated by remote control.
Operation of the operating mechanism, such as opening and closing the gripper
And an operation unit that controls the
And a control cable to be connected. The control cable can be formed to have a small diameter and can be inserted into the treatment instrument insertion channel. Therefore, only this control cable is inserted into the treatment instrument insertion channel, and the functional member is mounted on the holding portion provided at the treatment instrument outlet.
To wear. Thereby, the functional member is not restricted by the inner diameter of the treatment instrument insertion channel, and can be formed to a desired size. In addition, the control cable extends to the operation section of the main body through the treatment instrument insertion channel, and is connected to the forceps plug provided at the introduction port.
The operation part is connected to a screw part for removal. Therefore, the machine
The function member is controlled by an operation unit fixedly held by the main unit operation unit.
It can be remotely controlled in a stable state. In addition, treatment tools
As a member to be attached to the holding portion of the outlet, a grasping forceps
Not only with nails, but also with an operation unit
Various things can be installed as long as they work.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a schematic configuration of the endoscope. The endoscope generally includes an insertion section 1 to be inserted into a body cavity, a main body operation section 2 connected to a base end of the insertion section 1, and a universal cord 3. The insertion portion 1 includes a distal end hard portion 1a, an angle portion 1b, and a soft portion 1c in this order from the distal end side.
It has become. An illumination window 1 is provided on the distal end surface of the distal end hard portion 1a.
0, an observation window 11, a treatment tool outlet 12, and the like. A treatment instrument insertion channel 13 is provided in the treatment instrument outlet 12.
The treatment instrument insertion channel 13 passes through the entire insertion section 1, and the other end is connected to a treatment instrument introduction section 14 provided near a portion connected to the main body operation section 2.

Next, FIG. 2 shows a cross section of the distal end portion of the insertion section 1. The treatment instrument outlet 12 is formed of a through hole formed in the distal end hard portion 1a.
The treatment instrument insertion channel 13 is connected to the connection pipe 15. A step is formed on the distal end opening side of the treatment instrument outlet port 12 and the hole diameter is enlarged, and a functional member described later is detachably mounted on the inner surface thereof, and holds a stable state in the mounted state. Destination for
A screw portion 16 constituting an end-side mounting portion is formed. A connection ring 17 provided with a thread groove on the outer peripheral surface is always screwed into the screw portion 16, so that the treatment instrument outlet 12 has an even height with no step over its entire length.
A treatment with a uniform hole diameter that allows smooth insertion of various treatment tools
The original function of the tool insertion channel 13 can be demonstrated.
ing. Reference numeral 18 denotes an observation mechanism including an objective lens 18a and a solid-state imaging device 18b.

Here, in place of the connecting ring 17, various functional members can be attached to the treatment instrument outlet port 12. As this functional member, there is a forceps operating mechanism 20, as shown in FIGS. The forceps operating mechanism 20 has a pair of gripping claws 21 and 21 as an operating mechanism, and the gripping claws 21 and 21 are rotatably connected to a shaft 22. Extending portions 21a, 21a are connected to the gripping claws 21 toward the base end side from the connecting portion to the shaft 22, and links 23, 23 are pivotally attached to the extending portions 21a, 21a. ing. The other end of the link 23 is pivotally attached to the holder 24. A screw portion is formed on the outer surface of the holding body 24, and this screw portion is adapted to be screwed into the screw portion 16 of the treatment instrument outlet 12.

Reference numeral 25 denotes an operating wire for opening and closing the gripping claws 21 and 21 constituting the forceps operating mechanism 20. One end of the operating wire 25 is fixed to a connecting portion 26 provided to be connected to the shaft 22. , And extends through a wire insertion passage 24 a formed in the holding body 24. Between the connecting portion 26 of the operation wire 25 and the holder 24, there are always gripping claws 21 and
A spring 27 for urging the valve 1 in the closing direction is elastically mounted. On the other hand, when the shaft 22 is displaced in the direction approaching the holder 24 by the operation wire 25 against the spring 27, the gripping claws 21 and 21 are opened.

The operation wire 25 is connected to the treatment instrument insertion channel 1
3, the other end is led out of the treatment instrument introduction unit 14 to the outside, and is detachably connected to the operation unit 28. The operation unit 28 serves as an operation unit side mounting unit.
Screw part 14 for attaching and detaching the forceps stopper of the functional treatment instrument introduction part 14
a, and an operating member 30 slidable in the axial direction on the mounting portion 29. The operating member 30 has a shaft portion 30a provided in the axial direction and a shaft portion 30a. The finger ring 30b is provided continuously. The pin 3 is inserted into the fitting portion of the operating member 30 to the mounting portion 29.
1 is provided, and the pin 31 is inserted into a long groove 32 formed in the mounting portion 29 to prevent the operation member 30 from slipping out and rotating. The operation member 30 is provided with a wire insertion portion 30c, and the end of the operation wire 25 is inserted into the wire insertion portion 30c,
It is configured to be fixed by screwing the set screw 33.

In order to mount the forceps operating mechanism 20, first, the connecting ring 17 attached to the treatment instrument outlet 12 is removed, and the operation wire 25 is connected to the treatment instrument insertion channel through the treatment instrument outlet 12. 13, and the holding body 24 is screwed into the treatment instrument outlet 12. Further, the attachment portion 29 of the operation unit 28 is attached to the treatment instrument introduction unit 14.
Then, the distal end of the operation wire 25 is led out of the treatment instrument introduction portion 14 to the outside, and the wire insertion portion 3 of the operation member 30 is drawn out.
0c, insert the tip of the operation wire 25 into the set screw 3
Fix with 3. As a result, the forceps operating mechanism 20 is operable by the operation unit 28 and is mounted on the endoscope.

Here, the gripping claws 21 and 21 constituting the forceps operating mechanism 20 are not limited by the inner diameter of the treatment instrument insertion channel 13 and have a size as required, such as the size of an affected part. be able to. Then, the endoscope equipped with the forceps operating mechanism 20 is inserted into a patient's body or the like, and a finger or the like of the hand holding the main body operation unit 2 is fixedly held by the main body operation unit 2. The gripping claws 21, 21 of the forceps operating mechanism 20 are inserted through the finger ring 30 b of the operating member 30 and push and pull the shaft portion 30 a.
By opening and closing the device, operations such as grasping and extracting the affected part can be performed extremely easily in a stable state. In other words, treatment
Forceps actuation mechanism 20 at both ends of tool insertion channel 13
The operating member 30 is fixed, and the treatment tool insertion channel
Formed by inserting the operation wire 25 into the tunnel 13
A transmission tool integrated with the endoscope
Function.

FIGS. 5 and 6 show a second embodiment of the present invention. In this embodiment, a forceps actuating mechanism as an actuating mechanism of a functional member using hydraulic pressure is used. The mechanism is configured to open and close the gripping claws of the mechanism. That is,
A pair of gripping claws 41, 41 constituting the forceps operating mechanism 40 are rotatably mounted on a shaft 42, and extending portions 41a, 41a extending from a connecting portion of the gripping claw 41 to the shaft 42 to the base end side.
Links 43, 43 are pivotally connected to the
The reference numerals 3 and 43 are pivotally attached to the holding body 44. An operating rod 45 is connected to the shaft 42, and the tip of the operating rod 45 is connected to a piston 46. The piston 46 is the holder 4
4 is slidably provided in a working chamber 47 formed in the housing 4, and a spring 48 is elastically mounted between the piston 46 and the inner surface of the working chamber 47 of the holding body 44.
By the action of the spring 48, the operating rod 45 is moved to the operating chamber 47.
The shaft 42 is brought into the position close to the holder 4 and the gripping claws 41 are closed in this state.

When the piston 46 is pushed in the direction against the spring 48, the operating rod 45 is extended, the shaft 42 is displaced forward, and the gripping claws 41, 41 are opened. Piston 4
Numeral 6 is configured to be pushed by hydraulic pressure. For this purpose, in the treatment instrument insertion channel 13 is filled with working liquid comprising water such as, forceps plug detachment of the treatment instrument introduction section 14
A cylindrical body 49a is formed in the screw portion 14a for
Pushing member 49b is detachably attached to the cylindrical body 49a.
Have been. Accordingly, when the pushing member 49b is pushed into the passage of the treatment instrument introduction portion 14 in the cylindrical body 49a , pressure is generated in the treatment instrument insertion channel 13 in accordance with the pushing stroke, and the pressure is reduced. By the action, the piston 46 is slidably displaced along the working chamber 47. Follow
Thus, the cylindrical body 49a forms an attachment portion, and the cylindrical body 49a
And the pressing member 49b constitute an operating member,
As a whole, the operating part 49 is formed by the cylinder 49a and the pushing member 49b.
Is configured.

With the above configuration, the forceps operating mechanism 4
0 is screwed into the screw portion 16 provided in the treatment instrument outlet 12, the working liquid is supplied into the treatment instrument insertion channel 13, and the operation section 49 is attached to the treatment instrument introduction section 14. By simply pressing the main body operating section 2 with the fingers of the hand, the gripping claws 41 of the forceps operating mechanism 40 are opened to release the pressing force.
To close by the action of the spring 48.
The closing operation can be easily performed.

As the functional member, in addition to the above, various members can be mounted. In short, any functional member may be used as long as it can be attached to and detached from the treatment instrument outlet. It is not limited by the hole diameter of the insertion channel.
Further, if the connection ring is screwed into this screw portion, it can be made to function as a normal treatment instrument insertion passage.

[0019]

As described above, according to the present invention, the hole diameter extends over a predetermined length from the treatment instrument outlet port side of the treatment instrument insertion passage.
Is enlarged and a screw is formed on the inner surface, and the treatment instrument insertion passage
To make the inner surface uniform to the treatment tool outlet
Steps that can be screwed into the ring
Various functional members with an operating mechanism
With or without a common tip side mounting part that can be mounted, or
When a functional member is attached to this tip-side attachment,
Stable operation unit that operates the operation mechanism by remote control
Each operation section is attached to the treatment instrument
Since a common operation unit side mounting portion that is detachably mounted is provided , various functional members including a treatment tool having a large operating mechanism portion and this functional member are remotely operated. The operating part to be activated is fixedly incorporated into the endoscope, facilitating the operation part stably held by the surgeon.
And smoothly operated, and fixed to the front end mounting part
Certain functional components can be reliably operated and
The functional members and their operation parts can be easily attached and detached according to
The entire treatment tool insertion channel is
Partly configured as endoscope with built-in functional members such as treatment tools
When it comes to function and no functional components are used
If a connecting ring is attached to the distal end mounting part,
A treatment tool having a uniform inner surface shape with no steps or the like in the passage
Can be used as a path to guide the smooth and reliable
It has the effect of cutting.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an endoscope.

FIG. 2 is a sectional view of a distal end portion of an insertion portion.

FIG. 3 is an explanatory diagram of a configuration of a functional member according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of a configuration of operation means of the functional member of FIG. 3;

FIG. 5 is an explanatory diagram of a configuration of a functional member according to a second embodiment of the present invention.

FIG. 6 is an explanatory diagram of a configuration of an operation unit of the functional member of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Insertion part 12 Treatment tool outlet 13 Treatment tool insertion channel 14 Treatment tool introduction part 16 Screw part 17 Connection ring 20, 40 Forceps operation mechanism 21, 41 Gripping claw 24, 44 Holder 25 Operation wire 28 , 49 Operation part 30 Operation Member 46 Piston

Claims (1)

(57) [Claims] 1. An endoscope in which a treatment tool such as forceps is inserted through an insertion portion, and a treatment tool insertion passage having a lead-out port at a distal end portion and an introduction port at a main body operation section is provided. The hole diameter increases over a predetermined length from the treatment instrument outlet side of the passage
Then, a thread is formed on the inner surface of the portion where the hole diameter has increased.
Then, the treatment instrument insertion passage is connected to the screw
Connection ring for uniform inner surface shape
Different treatment functions by forming a functional step
A functional member with an operating mechanism
With and without a common distal end mounting part
Take the operating unit for operating by remote control the operating mechanism portion of the predetermined function member attached to the mounting portion is detachable
An endoscope , wherein a common operation unit side attachment portion to be attached is provided at the introduction port.