JPH10127652A - Structure of remote control part for treatment tool for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve versatility as a control part by respectively providing both the functions as a control part having a lock mechanism and as a control part having no lock mechanism even in any cases. SOLUTION: A control part 4 is provided with a lock mechanism 22 for disenabling the relative movement of 1st and 2nd finger hooks 15 and 16 mutually held so as to relatively move. This lock mechanism 22 has a 1st lock part 23 installed at the 1st finger hook 15 and a 2nd lock part 24 installed at the 2nd finger hook 16, and both the lock parts 23 and 24 are provided with lock parts 29 and 30 for setting the relative positions of the 1st and 2nd finger hooks 15 and 16 on plural stages while changing these relative positions on the respective stages. In addition to a lock position to mutually lock these lock parts 29 and 30, both the lock parts 23 and 24 can take an unlock position to mutually unlock these lock parts 29 and 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool for an endoscope used for an operation, a medical examination, or the like, in which a treatment portion provided at a distal end of an interlocking member inserted into a body through an endoscope is remotely controlled. The present invention relates to a structure of an operation unit operated and operated.

[0002]

2. Description of the Related Art A conventional operation portion of an endoscope treatment instrument includes a lock mechanism for disabling relative rotation between a first finger hook and a second finger hook rotatably supported with each other. There is. In this lock mechanism, for example, the first lock portion provided on the first finger hook and the second lock portion provided on the second finger hook are pressed against each other on opposing surfaces, and the relative positions of the two lock portions are determined. The opposite surface is provided with a concave and convex tooth-shaped locking portion for changing the relative rotation position of the first finger hook and the second finger hook into a plurality of steps and setting the relative position at each step.

[0003]

By the way, as the treatment section, there are various types such as a scissors-like treatment section for cutting and a grasping treatment section for grasping according to the purpose. In the treatment tool for an endoscope having this grasping treatment section, if the lock mechanism is provided, the holding state can be locked after holding the cut object, and the cut object can be easily taken out.

However, in a treatment tool for an endoscope having a scissor-like treatment section, if the lock mechanism is provided, it must be opened and closed while maintaining the unlocked state. Operation becomes difficult.

[0005] The present invention provides a highly versatile and convenient endoscope treatment which can be used both as an operation unit having a lock mechanism and as an operation unit without a lock mechanism regardless of the type of treatment unit. The purpose is to provide tools.

[0006]

The endoscope according to the present invention will be described with reference to the reference numerals of the drawings of the following embodiments (first embodiment shown in FIGS. 1 to 4 and second embodiment shown in FIGS. 5 to 8). The mirror treatment tool will be described.

In a treatment tool for an endoscope, a treatment section (2, 3) provided at a distal end of an interlocking member (1) inserted into the body through the endoscope is remotely operated by an operation section (4). To operate. In the operation section (4), a first finger hook (15) and a second finger hook (16) supported so as to be relatively movable with each other, and the first finger hook (15) and the second finger hook (16) are supported. Lock mechanism (22) for disabling relative movement with (22)
And In this lock mechanism (22),
First lock portion (23) provided on first finger hook (15)
And a second lock portion (2) provided on the second finger hook (16).
4), the relative positions of the first finger hook (15) and the second finger hook (16) are changed in a plurality of steps in each of the lock portions (23, 24), and the relative position is changed in each step. (29, 30).

In particular, the two lock portions (23, 24)
In addition to the locking position (P) where the locking portions (29, 30) are engaged with each other, the locking portions (29, 30)
Can be in an unlocked position (Q) for releasing the two from each other.

[0009]

DETAILED DESCRIPTION OF THE INVENTION

First Embodiment First, an endoscope treatment tool according to a first embodiment of the present invention will be described with reference to FIGS.

The treatment tool for an endoscope is roughly divided into an interlocking member 1 inserted into the body through the endoscope, and a treatment portion 2 provided at the distal end of the interlocking member 1 (see FIGS. 1 and 2). ) Or a treatment section 3 (see FIGS. 3 and 4), and an operation section 4 for operating the treatment sections 2 and 3 by remote control.

(About Outline of the Interlocking Member 1 and Treatment Units 2 and 3) In the interlocking member 1 shown in FIGS.
An interlocking rod 6 is inserted into an outer cylinder 5 formed of an elongated cylindrical plastic tube, and a locking portion 5a is formed at the base end of the outer cylinder 5 and protrudes from the base end of the outer cylinder 5. A locking portion 6 a is formed at the base end of the interlocking rod 6.

In the scissor-like treatment section 2 shown in FIG. 2, a pair of blades 7 and 8 are rotatably supported by the open / close center shaft 9 with respect to the distal end of the outer cylinder 5 and have both blades. An opening / closing link mechanism 10 is connected to the bodies 7 and 8, and the tip of the interlocking rod 6 is connected to the opening / closing link mechanism 10.

In the gripping treatment section 3 shown in FIG. 3, a pair of grippers 11 and 12 are rotatably supported by the open / close center shaft 13 with respect to the distal end of the outer cylinder 5.
An opening / closing link mechanism 14 is connected to the two grippers 11 and 12, and a distal end of the interlocking rod 6 is connected to the opening / closing link mechanism 14.

(Outline of the Operation Unit 4) In the operation unit 4 shown in FIGS. 2 and 3, the first finger hook 15 and the second finger hook 16 are rotatable by the opening / closing center shaft 17. Finger support rings 18a, 19a are formed on handle portions 18, 19 of both finger supports 15, 16, which are supported and are lower than the opening / closing center shaft portion 17, respectively. In the first finger hook 15, a connecting portion 20 is provided above the opening / closing central shaft portion 17.
Is formed, and a connecting portion 21 is formed in a portion of the second finger hook 16 above the opening / closing central shaft portion 17, and when the handle portions 18, 19 of the finger hooks 15, 16 are opened and closed, The connecting portion 21 of the second finger hook 16 approaches or separates from the connecting portion 20 of the first finger hook 15.

(Outline of the connection state of the interlocking member 1 to the operation unit 4) As shown in FIGS. 1A and 4A, the base end of the outer cylinder 5 and the interlocking The proximal end of the rod 6 is inserted into the connecting portion 20 of the first finger hook 15, and the locking portion 5a of the outer cylinder 5 is detachably connected to the connecting portion 20. 6 is the connecting portion 2 of the second finger hook 16
1 and is detachably connected to 1.

(Regarding the lock mechanism 22 for disabling the relative movement of the finger hooks 15 and 16) The lock mechanism 22 has a claw-shaped first lock portion 23 and a claw-shaped second lock portion 24. As shown in FIG. 1 (b) and FIG. 4 (b), the finger hook of the first finger hook 15 in the opposing inner sides of the finger hook rings 18a, 19a in the handle portions 18, 19 of the finger hooks 15, 16 Inside the ring 18a, a first lock portion 23 is rotatably supported by a shaft portion 25, and a concave storage portion 26 is formed. On the other hand, a second lock portion 24 is rotatably supported by a shaft portion 27 inside the finger hook ring 19 a of the second finger hook body 16, and a concave shape is formed outside the finger hook ring 19 a of the second finger hook body 16. A storage section 28 is formed. The first lock portion 23 protruding from the finger hook ring 18a and the second lock portion 24 protruding from the finger hook ring 19a are opposingly elastically pressed against each other, and their opposing surfaces are provided with locking portions 29, 30 (unevenness). Alternating teeth) are formed and engaged with each other. An operation knob 31 is formed on the second lock portion 24.

(Regarding the unlocked state of the lock mechanism 22 shown in FIGS. 1 and 2) In this unlocked state, the interlocking member 1 to which the scissor-like treatment section 2 is attached is connected to the operation section 4.

In the lock mechanism 22, the first lock portion 2
3 rotates around the shaft portion 25 to the unlock position Q, is retracted from the lock position P by being stored in the storage portion 26, and the second lock portion 24 is unlocked position Q about the shaft portion 27. To the locked position P
And the locking portions 29 and 30 are separated from each other.

When the operating portions 4 open and close the handle portions 18 and 19 of the finger rests 15 and 16 to move the connecting portion 21 closer to or away from the connecting portion 20, the interlocking member 1 moves the interlocking rod 6. The two blades 7, 8 of the scissor-like treatment section 2 also open and close.

(About the locked state of the lock mechanism 22 shown in FIGS. 3 and 4) In this locked state, the interlocking member 1 to which the gripping treatment section 3 is attached is connected to the operation section 4.

In the lock mechanism 22, the first lock portion 2
3 rotates from the unlock position Q to the lock position P about the shaft 25 and protrudes from the storage portion 26, and the second lock portion 24 moves from the unlock position Q to the lock position P about the shaft 27. , And protrudes from the storage portion 28, and the locking portions 29, 30 are engaged with each other.

In the operating section 4, the operating knob 31 is pushed to release both the locking sections 29 and 30, and the two finger hooks 15 and 16 are released.
When the connecting portions 21 approach and separate from the connecting portions 20 by opening and closing the handle portions 18 and 19, the interlocking rod 6 moves by the interlocking member 1 and the both grippers 11 and 12 of the gripping treatment portion 3 also open and close. . After being cut by the two blades 7 and 8 of the scissor-like treatment section 2 and held between the two grippers 11 and 12, the operation knob 31 is released and the two locking sections 29 and 30 are again engaged at appropriate positions. When this is done, the sandwiched state is locked, and the cut object can be easily taken out. The two locking portions 29,
By appropriately adjusting the engagement position between the first finger holders 15
The relative position between the connecting portion 20 and the connecting portion 21 of the second finger hook 16 is changed in a plurality of steps, the relative position is set in each step, and locking can be performed in the most suitable sandwiching state.

The first embodiment has the following feature (a) (other than other technical ideas described later). (A) In the lock mechanism 22 of the operation unit 4, the lock units 23 and 24 of the finger holders 15 and 16 are moved to the lock release position Q (see FIGS. 1 and 2) in addition to the lock position P (see FIGS. 3 and 4). Can also be set. Therefore, depending on the purpose of each of the treatment units 2 and 3, regardless of the type of the treatment units 2 and 3, regardless of the type of the treatment units 2 and 3, regardless of whether the operation unit 4 has the lock mechanism 22 or the operation unit 4 without the lock mechanism 22. Can be used for both purposes. Therefore, the versatility as the operation unit 4 is enhanced, and the operation unit 4 becomes more convenient for use.

[Second Embodiment] Next, an endoscopic treatment tool according to a second embodiment of the present invention will be described with reference to FIGS. The second embodiment differs from the first embodiment mainly in the following points. In addition, FIG. 1A of the first embodiment,
FIGS. 1 (b), 2, 3, 4 (a) and 4 (b)
5A and FIG. 5 of the second embodiment, respectively.
(B), FIG. 6 (a), FIG. 7, FIG. 8 (a) and FIG. 8 (b)
Corresponding to

As shown in FIG. 7 and FIG. 6 (b), in the handle portions 18 and 19 of the first finger hook 15 and the second finger hook 16, opposing inner corners of the finger hook rings 18a and 19a are provided. As the attaching / detaching portion 32, an attaching / detaching concave portion 33 is formed, and the attaching / detaching screw 34 is screwed into the attaching / detaching concave portion 33. The first lock portion 23 and the second lock portion 24 are applied to the two attachment / detachment concave portions 33, are fastened by the two attachment / detachment screws 34, and are integrally attached to the handles 18 and 19.

In the state shown in FIGS.
The third lock portion 24 and the second lock portion 24 are detached from the detachable portion 32 (lock release position Q) and stored. In the state shown in FIGS. 7 and 8, the first lock portion 23 and the second lock portion 24 are attached to the attachment / detachment portion 32 and are at the lock position P.

The second embodiment has the following feature (a) (other than the other technical ideas described later). (A) The feature (A) of the first embodiment can be referred to. [Other technical ideas] The technical ideas (other than the claims) that can be grasped from each embodiment are described together with the effects.

(B) In Claim 1, the treatment units 2 and 3
The interlocking member 1 to which is attached is detachably connected to the connecting portions 20 and 21 of the operation portion 4 by the locking portions 5a and 6a. Therefore, the same operation unit 4 can be used for the interlocking member 1 having the various treatment units 2 and 3 according to the purpose. Therefore, the versatility as the operation unit 4 is enhanced, and the operation unit 4 becomes more convenient for use.

(B) A structure corresponding to the first embodiment.
Is movably supported with respect to the first finger hook 15 between a lock position P and an unlock position Q. The first finger hook 15 retreats the first lock portion 23 from the lock position P at the unlock position Q. The second lock portion 24 is movably supported between the lock position P and the unlock position Q with respect to the second finger hook 16, and the second finger hook 16 is in the unlock position. A storage portion 28 is provided for storing the second lock portion 24 so as to be retracted from the lock position P in Q. Therefore, in the lock mechanism 22, the storage unit 2
With a simple structure in which only the 6 and 28 are provided, it is possible to easily use the locked state and the unlocked state properly.

(C) A structure corresponding to the second embodiment.
Has a detachable portion 32 for attaching the first lock portion 23 at the lock position P and detaching it at the unlock position Q. The second finger hook 16 attaches and locks the second lock portion 24 at the lock position P. It has an attachment / detachment portion 32 that detaches at the release position Q. Therefore, in the lock mechanism 22, the detachable portion 3
With a simple structure in which only 2 is provided, it is possible to easily use the locked state and the unlocked state properly.

[0031]

According to the endoscope treatment tool according to the present invention, the operation section (4) having the lock mechanism (22) can be used according to the purpose of the various treatment sections (2, 3). The operation unit (4) without the lock mechanism (22) can also be used as the operation unit (4), which enhances the versatility of the operation unit (4) and is convenient for use.

[Brief description of the drawings]

FIG. 1A is an assembled perspective view showing a state in which an interlocking member having a scissor-like treatment unit is connected to an operation unit in the treatment tool for an endoscope according to the first embodiment, and FIG. It is a partial front view of a).

FIG. 2 is an exploded perspective view showing a state in which an interlocking member having a scissors-like treatment section is separated from an operation section in the treatment tool for an endoscope according to the first embodiment.

FIG. 3 is an exploded perspective view showing a state in which only the interlocking member having the scissors-like treatment section is changed to the interlocking member having the gripping treatment section in the endoscope treatment tool shown in FIG. 2;

FIG. 4A is an assembled perspective view showing a state in which an interlocking member having a grasping treatment unit is connected to an operation unit in the treatment tool for an endoscope according to the first embodiment, and FIG. FIG.

FIG. 5A is an assembled perspective view showing a state in which an interlocking member having a scissor-like treatment section is connected to an operation section in the treatment tool for an endoscope according to the second embodiment, and FIG. It is a partial front view of a).

FIG. 6A is an exploded perspective view showing a state in which an interlocking member having a scissors-like treatment unit is separated from an operation unit in the endoscope treatment tool according to the second embodiment, and FIG. 6B is a lock mechanism. FIG. 3 is a partial perspective view of an operation unit in which the is disassembled.

FIG. 7 is an exploded perspective view showing a state in which only the interlocking member having the scissors-like treatment portion is changed to the interlocking member having the grasping treatment portion in the endoscope treatment tool shown in FIG.

FIG. 8A is an assembled perspective view showing a state in which an interlocking member having a grasping treatment section is connected to an operation section in the treatment tool for an endoscope according to the second embodiment, and FIG. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Interlocking member, 2, 3 ... Treatment part, 4 ... Operation part, 15 ... First finger hook, 16 ... Second finger hook, 22 ... Lock mechanism,
23: first lock portion, 24: second lock portion, 29, 30
... Locking part, P ... Lock position, Q ... Lock release position.

Claims (1)

[Claims] An endoscope for operating a treatment section (2, 3) provided at a distal end portion of an interlocking member (1) inserted into a body via an endoscope by remotely operating an operation section (4). In the treatment instrument, in the operation unit (4), a first finger hook (15) and a second finger hook (16) supported so as to be relatively movable with respect to each other.
And the first finger hook (15) and the second finger hook (16)
A lock mechanism (22) for disabling relative movement with the first finger hook (1).
5) a first lock portion (23) provided on the second finger hook (16), and a second lock portion (24) provided on the second finger hook (16). Locking portions (29, 3) for changing the relative position of the body (15) and the second finger hook (16) in a plurality of steps and setting the relative position in each step
0), and the locking portions (23, 24) are provided with their locking portions (2).
9. The endoscope according to claim 1, wherein a lock release position (Q) for releasing the locking portions (29, 30) from each other can be taken in addition to a lock position (P) for engaging the first and second locks (9, 30) with each other. Structure of the remote control unit in the treatment tool.