JPH0838493A - Surgical forceps - Google Patents

Abstract

PURPOSE:To facilitate cleaning of the attachment part of a ratchet level and surroundings of a handle fulcrum, by forming the attachment part of the ratchet level and the space of a gap part around the handle fulcrum in a size through which a cleaning brush can be inserted. CONSTITUTION:An attaching groove hole 22 in which the rotatorily-moving base edge part of a ratchet lever 21 is fitted is formed on the way of the handle body 6 of a handle 4, a space in such a size that a cleaning brush can be inserted into the inside of the groove hole 22 is made in the attachment groove hole 22 with a radius of a circular area and the width of the groove hole 22. The rotatorily-moving edge side part of the ratchet lever 21 penetrates a groove hole 31 which is formed in such a state that it penetrates on the way of the handle body 7 of the handle 5, to be projected down, and the width of the penetration groove hole 31 is formed to provide a space in such a size that the cleaning brush can be inserted into the groove hole 31. The groove hole 31 through which the handle body 7 of the handle 5 is made to penetrate is formed on the handle body 6 part of the handle 4, the width of a groove hole 41 is formed to form a space in such a size that the cleaning brush can be inserted into the groove hole 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical forceps for use in surgical operation, for example, operation under observation with an endoscope.

[0002]

2. Description of the Related Art For example, a forceps for surgical operation under observation with an endoscope is known, but its operating portion has a movable handle pivotally attached to a fixed handle by a pivot pin. In addition, a locking mechanism for holding the movable handle at the position where it is rotated is provided. As this locking mechanism, a ratchet mechanism using a ratchet claw and a ratchet lever is used, as in German Utility Model G9109113.6. In this case, the rotation base end portion of the ratchet lever is pivotally mounted in a state of being fitted into a mounting groove formed in a movable handle provided on the hand side.
On the other hand, the rotation end side portion of the ratchet lever penetrates a slit formed on the fixed handle side, and the ratchet lever is engaged with a ratchet claw portion formed at one end of the slit. .

[0003]

However, in this conventional surgical forceps, the groove provided in the movable handle into which the proximal end of the ratchet lever is fitted is narrow,
It is difficult to remove the dirt that entered the part. Further, it was difficult to put a cleaning brush in the groove, and it was extremely difficult to clean the groove portion.

On the other hand, at the fulcrum part where the movable handle is pivotally attached to the fixed handle, the members are in close contact with each other,
The gap around the fulcrum is narrow, and it is difficult to remove the stains inside the gap. In addition, there was no gap or groove in which the cleaning brush can be inserted around the fulcrum, which made cleaning difficult.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a surgical treatment tool in which the mounting portion of the ratchet lever and the periphery of the fulcrum of the handle can be easily washed. .

[0006]

According to the present invention, an operating portion rotatably supporting a first handle and a second handle via a fulcrum, and an operating portion which is operated in association with a handle operation of the operating portion. A treatment portion, a ratchet lever that is rotatably pivotally attached to the one handle and is engaged with the other handle to restrict the handle operation of the operating portion, and the ratchet lever and the handle portion that pivotally attaches the ratchet lever. A first space formed between the first handle and the second handle, a second space formed between the ratchet lever and a portion of the handle that engages the ratchet lever, and the first handle and the second handle. A surgical treatment instrument having a third space formed between members in portions pivotally connected to each other, and at least one space of the respective spaces having a size allowing insertion of a cleaning brush. According to this surgical treatment instrument, it is possible to easily clean the attachment portion of the ratchet lever and the gap portion around the fulcrum of the handle.

[0007]

【Example】

(First Embodiment) A first embodiment of the present invention will be described with reference to FIGS. This embodiment relates to surgical forceps, and FIG. 1 shows the whole thereof. As shown in FIG. 1, the surgical forceps 1 has a treatment section 2 and an operation section 3 for operating the treatment section 2. The operation unit 3 includes the first handle 4
And the second handle 5, both handles 4, 5
The handle bodies 6 and 7 are pivotally attached to a pivot pin 8 as a fulcrum.

Rings 11 and 12 are formed at the base end portions of both handle bodies 6 and 7, respectively.
Finger hooks 13 and 14 are integrally formed at the base ends of 1 and 12, respectively. The finger rests 9 and 10 of the handle bodies 6 and 7, the rings 11 and 12, and the finger hooks 13 and 14 are arranged on the same straight line L for each of the handles 4 and 5. When operating the handle with the operation unit 3, place the middle finger on the finger rests of the handles 4 and 5, put the ring finger on the rings 11 and 12 of the handles 4 and 5, and put the little finger on the finger rests 13 and 14. There are many. here,
As shown in FIG. 18, which will be described later, the middle finger, ring finger, and little finger of the operating hand are aligned on the same axis L when gripping the handles 4 and 5. 4 and 5 are easy to hold and easy to grip.

In the treatment section 2, the handle main bodies 6 and 7 are extended to the tip end side from their pivot points, respectively, and gripping pieces 15,
16 is formed. The handle body 6 and the grip piece 15 are
The handle body 7 and the gripping piece 16 are also formed as an integral arm member. These arm members intersect at their pivot points. The gripping tips of the gripping pieces 15 and 16 are opened and closed by rotating the handles 4 and 5. Gripping piece 1
Reference numerals 5 and 16 form gripping portions by forming tooth portions 17 that mesh with each other on the joint surface at the gripping tip end portion.

The handle bodies 6 and 7 have a locking mechanism incorporated therein for holding the handle body 6 in its rotated position.
That is, an attachment slot 22 into which the rotation base end of the ratchet lever 21 is fitted is formed in the middle of the handle body 6 of the first handle 4 located on the upper side, as shown in FIG. , In the state where the rotation base end portion of the ratchet lever 21 is fitted into the groove hole 22,
The slot 22 is traversed and pivotally supported by a pivot pin 23 having both ends attached to the handle body 6 in a state of penetrating the rotation base end portion of the ratchet lever 21. As shown in FIG. 2, both end head portions 24 of the pivot pin 23 are crimped. The outer surface of the caulked portion is flush with the outer surface of the handle body 6, and since no unevenness is formed on the surface, the caulked portion is less likely to become dirty, and
Even if it gets dirty, it is easy to clean. Even if the pivot pin 23 is simply press-fitted, the same effect can be obtained.

In the area of the mounting slot 22, the end edge is formed in a circular shape with a radius passing through the handle body 6 with the pivot pin 23 as the center. That is, the mounting slot 2
2 is formed by a circular area. The radius of the region and the width a of the groove 22 are such that a cleaning brush, which will be described later, forms a first space having a size that can be inserted into the groove 22. Further, as shown in FIG. 2, the corners of the corners 22a of the mounting slot 22 are formed as rounded curves having a smooth curve so that dirt is unlikely to adhere to the corners and the dirt is easily removed. It should be noted that the gap between the ratchet lever 21 and the wall surface of the slot 22 is also preferably large, but if the thickness t of the ratchet lever 21 is a general size, the relationship of a ≧ 2t is set. Is desirable. That is, it is desirable that the width a of the groove 22 is approximately twice or more the width t of the ratchet lever 21. Within the range of a ≧ 2t, it is possible to shift the ratchet lever 21 to the left and right inside the slot 22, which has the advantage that the area around the pivot pin 23 can be easily cleaned.

Further, a projection portion 25 which is bent and projected in a hook shape is formed at the rotation base end portion of the ratchet lever 21, and the projection portion 25 is attached to the handle body 6. The free end of the leaf spring 26 is pressed.
The ratchet lever 21 is biased by the elastic force of the biasing member composed of the leaf spring 26 so as to rotate in the clockwise direction shown in FIG. As shown in FIG. 1, the base end of the leaf spring 26, which is an urging member, is attached and fixed on a pedestal 27 formed or attached to the handle body 6 in a raised state. Therefore, the leaf spring 26 is attached in a state of being lifted from the side surface of the handle body 6. By doing so, a relatively large space is created in the inner portion of the leaf spring 26, and the cleaning brush described later can be inserted through this gap. For this reason, it is easy to remove the dirt attached to the vicinity thereof. In addition, as shown in FIG.
The leaf spring 26 is attached and fixed to the pedestal 27 by a headed screw 28, and a screw having a head 29 with a groove not having a groove is used. Therefore, the head screw 28
Does not easily get dirty.

As shown in FIG. 1, the ratchet lever 21
The turning end side portion of the second penetrating portion penetrates a slot 31 formed in a state of penetrating a middle portion of the handle body 7 of the second handle 5 located on the lower side and projects downward. The penetrating slot 31 is formed in a positional relationship corresponding to the above-described mounting slot 22, and the width a of the slot 31 is such that a cleaning brush described later can be inserted into the slot 31. To form the second space of the. Similar to the groove 22 described above, the corners of the groove 31 are also formed as rounded curves having a smooth curve so that dirt is unlikely to adhere and dirt can be easily removed. It is preferable that the gap between the ratchet lever 21 and the wall surface of the groove hole 31 is also large. However, as in the case described above, if the thickness t of the ratchet lever 21 is a general size, a ≧ 2t. It is desirable to set the relationship.

The tip end portion of the ratchet lever 21 is always formed with a length sufficient to completely penetrate the groove hole 31, and this tip end portion serves as a finger hook portion 32. Saw-toothed ratchet teeth 33 are formed on the biasing rotation side edge portion of the middle portion of the ratchet lever 21. As shown in FIG. 1, the ratchet teeth 33 protrude to the area of the slot 31. It is adapted to be locked to the claw 34. The ratchet pawl 34 is attached to the handle main body 7 of the second handle 5, but it may be attached to the handle main body 7 of the second handle 5 with a similar head screw while being lifted from the side surface of the handle main body 7 as in the case of the leaf spring 26 described above. Good. In this way, a cleaning space is formed inside the mounting portion of the ratchet claw 34, and a cleaning brush described later can be inserted into this space, so that it is easy to remove dirt adhering to the inner portion. Is obtained.

In the state shown in FIG. 1, the first handle 4 is
Ratchet teeth 33 of ratchet lever 21 protruding from
Composes a stopper mechanism that locks with the ratchet pawl 34 on the second handle 5 side to limit the movement of the handles 4, 5 in the opening direction. Here, the finger hook 3 of the ratchet mechanism
Put your finger on 2 and ratchet lever 21 against the urging force.
By pushing downward (to the right in FIG. 1), the engagement is released, the rotation limitation is released, and the handles 4 and 5 can be moved in the opening direction.

Next, the structure of the pivotal support portion, which pivotally attaches the first handle 4 and the second handle 5 by means of the pivot pin 8, will be described. That is, as shown in FIG. 3, the handle body 6 of the first handle 4 is provided with a slot 41 for penetrating the handle body 7 of the second handle 5 that intersects the handle body 6. Slot 4 of handle body 6
In a state where the other handle main body 7 is penetrated with respect to 1, the handle main body 7 is pivotally attached to the other handle 5 by a pivot pin 8 which passes through and crosses the other handle main body 7. As shown in FIG. 3, both ends 42 of the pivot pin 8 are crimped on the outer surface portion of the handle body 6 of the first handle 4. The outer surface of the caulking portion is flush with the outer surface of the handle body 6, has no irregularities on the surface, is less likely to become dirty, and is easy to clean. In addition,
Even if the pivot pin 8 is simply pressed into the hole, the same effect can be obtained.

As shown in FIG. 3, in this case, the width b of the groove 41 is determined by the cleaning brush, which will be described later.
It is intended to form a third space having a size that can be inserted into the inside of 1. The corners 43 of the slot 41 are also formed as rounded curves having a smooth curve so that stains are less likely to adhere and stains are easily removed. Further, it is preferable that the gap between the handle main body 7 penetrating the groove 41 and the wall surface of the groove 41 is also large. Here, in order to stabilize the rotation of the first handle 4 and the second handle 5, the boss portion 4 through which the pivot pin 8 penetrates.
Although the thickness of 4 is such that it is in contact with the width of the slot 41, the diameter of the boss portion 44 is made as small as possible so as not to obstruct the insertion of the cleaning brush. Boss 4
Both end portions of 4 are projected so as to be raised so as to have a thickness of two steps, and a minimum gap effective for cleaning this portion is secured. In particular, it is advisable to provide a space between the handle 5 other than the boss portion 44 and the wall surface of the groove 41 with a space large enough for the cleaning brush to be inserted.

As described above, the cleaning brush can be easily inserted into the groove 41, and the corners of the groove 41 are rounded so as not to easily get dirty and easily removed. Thus, the portion where the second handle 5 is pivotally attached can be easily washed.

FIG. 5 and FIG. 6 show brushes used for cleaning the surgical forceps 1, respectively. In each of the cleaning brushes, a large number of bristles are planted at the tip of the operating rod 45 to form the brush portion 46. And
The cleaning brush shown in FIG. 5 has a cylindrical brush portion 46, and the cleaning brush shown in FIG. 6 has a brush portion 4 thereof.
6 has a rectangular parallelepiped shape. These cleaning brushes are selected and used according to the site to be used.

FIG. 7 shows a modification of the portion for pivotally attaching the handles 4, 5 in the first embodiment. That is, the mounting portion 47 is projected and branched from the handle body 6 of the one handle 4. The handle body 7 of the other handle 5 is attached to the tip of the mounting portion 47 by a pivot pin 48.
It was pivotally attached through. Like this, handle 4,
In the case where the pivot attachment part 47 of 5 is branched, a space for inserting the cleaning brush is formed between the parts, and the part can be easily cleaned. The attachment part 47 may be a pair of parts that straddle the handle body 7 of the other handle 5. The ratchet mechanism that restricts the movement of the handles 4 and 5 in the opening direction and the ancillary structure thereof are as described above, and thus the description thereof is omitted. (Second Embodiment) An endoscopic surgical forceps according to a second embodiment of the present invention will be described with reference to FIGS. The surgical forceps 51 is used by being inserted into a living body through a guide such as a trocar mantle tube (not shown) when performing surgery under laparoscopic observation.

FIG. 8 shows the entire surgical forceps 51, which includes an insertion portion 52 to be inserted into a living body through a trocar mantle tube (not shown) and a proximal side operation connected to the proximal end portion. It is provided with a section 53 and a treatment section unit 54 installed from the insertion section 52 to the proximal side operation section 53.

The insertion portion 52 has a straight tubular sheath 56 forming an outer shell of the insertion portion 52, and a portion of the sheath 56 serves as an insertion portion to be inserted into a living body through a trocar outer sheath tube (not shown). A tubular body 59 integrally formed with a rotary operation knob 57 and an injection cock 58 located on the distal side is fixedly attached to the outer periphery of the proximal end portion of the sheath 56 in a fitted state. ing. Injection cock 5
An elastic cap 60 is attached to the opening of No. 8.

The proximal end portion of the insertion portion 52 is rotatably and detachably connected to the hand side operation portion 53, and the rotation operation knob 57 rotates the insertion portion 52 together with the treatment portion unit 54. It can be operated. From the tip of the insertion section 52, a distal treatment section 61 projects as an action section of the treatment section unit 54. Treatment unit 5
The operation shaft 62 of No. 4 has a hand side operation unit 53 configured as described later.
The distal end treatment section 61 is opened and closed by the operation of holding the distal treatment section 61.

Further, as shown in FIG. 8, the hand side operation portion 53 is provided with a fixed handle 65 and a movable handle 66, and the movable handle 66 is connected to an intermediate portion near the upper end of the fixed handle 65 by a pivot pin 67. It is rotatably pivoted. That is, as shown in FIG. 8 and FIG. 9, a pair of bilaterally symmetrical support pieces 68 that extend integrally from the fixed handle 65 side, branch, and bend are formed. On the other hand, a support seat 69 is formed on the side of the movable handle 66 facing the support piece 68 by cutting out the left and right sides thereof. As shown in FIG. 9, a support seat 69, which is thinner than the main body portion of the movable handle 66, is fitted and arranged between the pair of left and right support pieces 68. As shown in FIG.
The pivot pin 67 includes the support seat 69 and a pair of support pieces 68.
Penetrate through. The heads 70 at both ends of the pivot pin 67 are crimped to the support pieces 68. The portion of the head portion 70 that has been caulked is flush with the outer surface of the support piece 68, and the surface of this portion has no irregularities, so that dirt is unlikely to adhere and the dirt can be easily washed.
Even when the pivot pin 67 is press-fitted and fixed in the hole,
It has the same effect.

A groove-shaped third space is formed between the pair of branch-shaped support pieces 68, and the width b of the groove 71 is the same as the direction described by the arrow shown in FIG. It is designed to form a space large enough for a brush for brushing. Therefore, when cleaning this portion, since the cleaning brush is inserted therein, it is easy to clean. Also,
Since the support piece 68 is branched and extended, the cleaning brush is more likely to enter.

At the portion of the support seat 69 through which the pivot pin 67 passes, a boss portion 71 projecting on both sides thereof is formed. That is, the portion of the support seat 69 is formed so as to be raised in two steps. Although the thickness of the boss portion 69a is large enough to contact the inner surface of the groove portion 70, the diameter of the portion of the boss portion 69a through which the pivot pin 67 is penetrated is made as small as possible to prevent the cleaning brush from being inserted. You should not do it.

Further, as shown in FIG. 9, a gap for inserting the cleaning brush is formed between the portion of the support seat 69 supporting the support piece 68 and between the peripheral edge of the support piece 68 and the step end surface of the support seat 69. It is set to open. Further, the corners of the corners 71a of the mounting groove 71 are formed as rounded curves having a smooth curve so that dirt is unlikely to adhere and dirt is easily removed.

An operation shaft mounting portion is formed on the upper end portion of the movable handle 66, and the treatment portion unit 54 is provided here.
Is formed with a vertical groove 72 into which a spherical portion 73 formed at the end of the operation shaft 62 is fitted. The spherical portion 73 is slidably engaged with the fitting vertical groove 72, and when the movable handle 66 is rotated, The operation shaft 62 of the treatment section unit 54 is operated to move back and forth. At the upper end of the fitting vertical groove 72, a hole having a diameter large enough for the spherical portion 73 to be inserted is formed.

Further, between the fixed handle 65 and the movable handle 66, there is incorporated a locking mechanism for holding the movable handle 66 at its arbitrary rotation position when the movable handle 66 is rotated. The locking mechanism has basically the same configuration as that of the first embodiment described above, and a description thereof will be omitted. 10 is a view on arrow C in FIG.
11 is a view on arrow D in FIG. 8, and FIG.
It is a sectional view of a portion along the middle EE line.

For example, in the state shown in FIG. 8, the movable handle 66 is restricted from moving in the opening direction by the ratchet lever 21, and the restriction is released by pushing the finger hook 32 at the tip of the ratchet lever 21 downward. The movable handle 66 can move in the opening direction. (Third Embodiment) An endoscopic surgical forceps according to a third embodiment of the present invention will be described with reference to FIGS. This endoscopic surgical forceps is similar to the endoscopic surgical forceps according to the second embodiment described above, but different points will be mainly described below.

First, in the hand side operation portion 53, the pivotal attachment portion of the movable handle 66 with respect to the fixed handle 65 is shown in FIG.
4 to 16 are configured. That is, a pair of left and right support pieces 81 is provided on the upper end portion of the movable handle 66.
A support seat 82, which is thinner than the main body portion, is formed by cutting out the left and right sides of the fixed handle 65 side portion facing the support piece 81. This support seat 82
Is a slot 8 formed by a pair of left and right support pieces 81.
3 is fitted and arranged.

The pivot pin 84 penetrates across the pair of support pieces 81 and the seat 82, and the head of the end of the pivot pin 84 is caulked to at least one of the support pieces 81. However, here, FIG. 15 and FIG.
As shown in FIG. 5, a male screw 85 is formed only on the inserting base portion, and this male screw 85 is screwed and attached to a female screw 86 formed on the support piece 81. The head 87 of the threaded pivot pin 84 projects to the outside.

As shown in FIG. 14, the inner peripheral edge of the groove hole 83 is circular, and the support seat 8 fitted in the groove hole 83 is formed.
The outer peripheral edge of 2 is also circular around the pivot pin 84,
Inside the slot 83, in the direction shown by the arrow in FIG.
A third space 88 having a size large enough to insert a brush for cleaning is formed. Further, as shown in FIG. 16, the support seat 82 forms a gap 89 between the tip of the support piece 81 and a sufficient width for cleaning by inserting a brush.

On the other hand, the operation shaft mounting portion formed on the upper end portion of the movable handle 66 is constructed as shown in FIGS. 14 and 15. That is, the upper end portion of the movable handle 66 is formed with a vertical groove 72 into which a spherical portion 73 formed at the end of the operation shaft 62 of the treatment section unit 54 is fitted, and the spherical portion 73 is slidable in the vertical groove 72. When the movable handle 66 is rotated by engaging with, the operation shaft 62 of the treatment section unit 54 is moved forward and backward.

In the state shown in FIG. 14, an end face 75 is formed at the bottom of the vertical groove 72 to which the spherical portion 73 formed at the end of the operating shaft 62 contacts. Since the spherical portion 73 is in contact with the end surface 75 at the bottom of the vertical groove 72 in this manner, the operating shaft 62 of the treatment portion unit 54 does not largely swing downward even when the handle portion is opened and closed. That is, the terminal end portion of the operation shaft 62 is restricted by contacting the bottom end surface 75 of the vertical groove 74, which has a stop function, at least at one position in the open / close position in the opening operation of the movable handle 66. Therefore, it is possible to prevent the operation shaft 62 from bending.

Furthermore, the bottom of the vertical groove 72 has a cleaning hole 9 penetrating therethrough so as to communicate with the space 88 of the groove hole 83.
1 is formed. For this reason, when the cleaning brush is inserted as shown by the arrow, the cleaning brush can be inserted, and cleaning of the periphery thereof becomes easy.

The pivot pin 84 is a pair of left and right support pieces 8.
Since it is screwed into only one of the one and is fitted into the other support piece 81, even if the threaded pivot pin 84 is tightened in order to prevent the threaded pivot pin 84 from loosening. The support seat 82 is not tightened by the pair of left and right support pieces 81. Therefore, the movement of the movable handle 66 does not deteriorate due to friction, which is convenient for operation.

Endoscopic surgical forceps 51 in this embodiment
A current is supplied through the handles 65 and 66, the insertion portion 52, and the like for high-frequency treatment. In order to pass a high-frequency current in this way, an insulating coating 92 is applied to each member for the purpose of insulation. However, as shown in FIG. 16, in order to prevent the insulating coating 92 from peeling off from the movable handle 66, the movable handle 66 is prevented. The member is provided with a recess 93 in a portion thereof, and the insulating coating 92 is allowed to enter the portion of the recess 93.

As shown in FIG. 17, a plug 95 for connecting a current cord (not shown) is provided, and the base portion of this plug 95 is also covered with an insulating member 96 made of insulating coating so that the current cord can be inserted. It prevents an electric shock when it is incomplete or when a water drop adheres to the root of the plug 95. As a material for the insulating member 96 and the insulating coating 92, polysulfone, polyacetal, tetrafluoroethylene, or the like can be considered. Further, as shown in FIG. 17, the gap between the plug 95, the insulating member 96, the insulating coating 92, etc. is filled with an adhesive 97 to close it.

Further, the fixed handle 65 in the operating portion shown in FIGS. 8 and 13 is provided with the finger hooking portion 14 curved outward, and the finger rest portion 98 and the ring 12 of the fixed handle 65 are further provided. And finger hook 14 have the same axis L
Is placed on top of.

Usually, the middle finger is hung on the finger contact portion 98 of the fixed handle 65, the ring finger is put on the ring 11 of the fixed handle 65, and the little finger is hung on the finger hanging portion 14 below the ring 11. Here, since the middle finger, the ring finger, and the little finger are lined up on the same line when the handle is gripped as shown in FIG. 18, the shape described above makes the shape familiar to the hand and easy to grip. . Furthermore, the inclination angle θ of the axes of both the handles 4 and 5 is made to coincide with the inclination angle θ ′ of the axes formed by the fingers to eliminate the uncomfortable feeling when grasped by the hand.

19 to 21 show examples in which the shape of the finger rest is changed. In the example shown in FIG. 19, the finger-holding portion 14 is curved to the front side (inside) to make it easier to apply a force to the fixed handle 65 in the opening direction.

Next, FIG. 20 shows an example in which the finger-holding portion 14 of the fixed handle 65 has a shape for facilitating application of force in both the opening direction and the closing direction, and the finger-holding portion 14 is bifurcated. .

In the example shown in FIG. 21, the finger hook portion 14 is formed in a ring shape, and in consideration of the case where the ring finger of the movable handle 66 is used to hold the ring finger, the movable handle 66 is also provided with the finger hook portion 19. . (Fourth Embodiment) Referring to FIGS. 22 and 23, a fourth embodiment of the present invention is shown. This embodiment shows a modification of the endoscopic surgical forceps according to the second embodiment. FIG. 22 shows a state where the movable handle 66 is opened to the maximum. FIG. 23 is a view on arrow H in FIG.

That is, in the fourth embodiment, the mounting slot 2 into which the rotation base end of the ratchet lever 21 is fitted.
2 is continuous and reaches the inside of the ring 11, which facilitates cleaning of these parts.

Further, as shown in FIG. 23, the finger hook portion 32 of the ratchet lever 21 is wider than the width of the groove hole 31. Therefore, when the movable handle 66 is excessively opened, it hits the fixed handle 65. , No more opening. (Additional Note) According to the above configuration, the following items can be obtained.

1. An operation unit that rotatably supports the first handle and the second handle via a fulcrum, (a treatment unit that is operated in conjunction with a handle operation of the operation unit, the treatment unit, and the operation unit. And a tubular insertion portion that connects the operation portion and an operation shaft that is inserted into the insertion portion and that transmits the movement of the operation portion operated by the operation portion to the treatment portion. A ratchet lever that engages with the handle to regulate the operation of the handle of the operating portion, a first space formed between the ratchet lever and a portion of the handle that pivotally attaches the ratchet lever, the ratchet lever and the ratchet lever. A second space formed between a part of the handle to be worn, and a third space formed between members in a part pivotally connecting the first handle and the second handle to each other; At least of each space Forceps or endoscopic treatment tool, characterized in that the three spaces are formed in a size that allows the cleaning brush to be inserted therethrough (Note that the components in parentheses are not mandatory components but are optional. It should be done.)

2. A slot is formed in one of the handles of the operation section, and the rotation base end of the ratchet lever is inserted and arranged in the slot, and the ratchet lever is rotated by the shaft body installed in the slot. The forceps for operation according to the above item 1, characterized in that a movable base end portion is pivotally attached, and a first space having a size large enough to allow the cleaning brush to be inserted therein is formed in the groove hole. Or a treatment tool for an endoscope.

In the surgical forceps or the endoscopic treatment tool, the gap around the fulcrum that pivotally attaches the rotation base end of the ratchet lever was small, and it was difficult to clean this part, but the cleaning brush could not be inserted. Since the first space having a size as large as possible is formed, brush cleaning can be performed easily and reliably.

3. The surgical forceps or the endoscopic treatment tool according to the above item 2, wherein the width of the slot is about twice or more the width of the ratchet lever. 4. A groove hole is formed in one of the handles of the operation portion for inserting and rotating the pivoting tip side portion of the ratchet lever, and a large hole with a large enough size to allow the cleaning brush to be inserted into the groove hole. The surgical forceps or the endoscopic treatment tool according to the item 1, wherein two spaces are formed.

It was difficult to clean because the groove hole for inserting the penetrating tip side of the ratchet lever through was narrow and it was difficult to clean.
Since the second space having a size large enough to allow the cleaning brush to be inserted therein is formed, brush cleaning can be performed easily and reliably.

5. The surgical forceps or the endoscopic treatment tool according to the above item 4, wherein the width of the slot is approximately twice or more the width of the ratchet lever. 6. A pair of support pieces is provided on one handle side at a portion where the first handle and the second handle of the operation portion are pivotally attached to each other, and a groove hole is formed between the pair of support pieces, and the other is formed. A support seat to be inserted into the groove hole is formed on the handle side of the shaft body, and a shaft body that penetrates the support seat and is installed between the support pieces in a state where the support seat is inserted into the groove hole and arranged. Thereby forming a pivotally connecting portion for rotatably supporting the first handle and the second handle, and the groove hole has the third portion having a size large enough to allow the cleaning brush to be inserted therein. The surgical forceps or the endoscopic treatment tool according to the above 1, wherein the space is formed.

7. The surgical forceps or the endoscopic treatment instrument according to the above item 6, wherein the pair of support pieces project from a handle body provided with the support pieces and are branched. 8. The surgical forceps or the endoscopic treatment tool according to the above item 6, wherein the boss portion of the support seat has a two-step thickness protruding from other portions.

9. The base end portion is attached to the member of the one handle, and the elastic free end portion is pressed against the ratchet lever to urge the ratchet lever in a direction to engage with the ratchet pawl attached to the other handle. An elastic pressing member is provided, and the cleaning brush is of a size large enough to be inserted between the urging free end of the elastic pressing member and the handle member to which the elastic pressing member is attached. A surgical forceps or a treatment tool for an endoscope according to the above item 1, wherein a gap forming a space is provided.

10. The shape of at least one of the first handle and the second handle in the operating portion is such that the finger resting back surface portion of the handle body, the finger resting portion inside the finger ring portion, and the finger resting portion of the finger hook portion are substantially the same. Arranged in a straight line, the surgical forceps or the endoscopic treatment tool according to the above item 1.

Generally, the handle of surgical forceps has a USP5
Although a finger rest and a ring are provided like 160343, in the conventional one, the handle, the finger rest, and the ring are not on the same coaxial line, and the shape of the hand when held by hand and the positional relationship between the handle, the finger rest, and the ring. This is because they did not match.

11. An attachment groove for slidably engaging a base end of an operation shaft whose distal end side is connected to the treatment section is formed in one of the handles, and at least one of positions at which the handle is operated by rotating the handle is operated. The surgical forceps or the treatment instrument for endoscope according to the above-mentioned item 1, characterized in that the base end of the operation shaft hits at a position, for example, at the operation end thereof, and means for restricting movement is configured.

12. The surgical forceps or the endoscopic treatment tool according to the above item 11, wherein the means for restricting the movement is configured by abutting a base end of the operation shaft on a lower end of the mounting groove.

Conventionally, when the handle is opened and closed, the operating shaft is shaken in the vertical direction by the mounting portion of the handle portion, and the operating shaft is bent. The operation shaft is bent because the operation shaft mounting portion is a deep groove, and therefore the operation shaft is bent particularly downward. However, according to the configuration of the eleventh or twelfth item, it can be avoided. .

13. An attachment groove for slidably engaging a base end of an operation shaft whose distal end side is connected to the treatment portion is formed in one of the handles, and the handle is pivotally operated to operate the treatment portion at least 1 At a location, for example, at the end of its operation, a base end of the operating shaft hits the end of the mounting groove to restrict movement, and a cleaning hole for communicating the mounting groove with the inside of the groove is formed. The surgical forceps or the endoscopic treatment tool according to the above item 2, which is formed.

In a similar surgical forceps having an operating shaft, the groove of the mounting portion is open upward but does not penetrate downward, so the connecting portion with the operating shaft is also the same. Although it is difficult to clean, the cleaning can be performed easily and surely by forming the cleaning hole that connects the mounting groove and the inside of the groove.

[0062]

As described above, according to the present invention,
It is possible to provide a treatment tool for an endoscope in which it is easy to clean the mounting portion of the ratchet lever and the gap portion around the fulcrum of the handle.

[Brief description of drawings]

FIG. 1 is a side view of a surgical forceps according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the main part of the surgical forceps taken along the line AA in FIG.

FIG. 3 is a cross-sectional view of the main part of the surgical forceps taken along the line BB in FIG.

FIG. 4 is a plan view of a head screw portion for fixing a leaf spring in the embodiment.

FIG. 5 is a perspective view of a cleaning brush.

FIG. 6 is a perspective view of another cleaning brush.

FIG. 7 is a side view of a modified example of the surgical forceps according to the first embodiment of the present invention.

FIG. 8 is a side view of the surgical forceps according to the second embodiment of the present invention.

9 is a cross-sectional view of the main part of the surgical forceps taken along the line GG in FIG.

FIG. 10 is a view on arrow C in FIG.

FIG. 11 is a view on arrow D in FIG.

12 is a cross-sectional view of the main part of the surgical forceps taken along the line EE in FIG.

FIG. 13 is a side view of the surgical forceps according to the third embodiment of the present invention.

FIG. 14 is a sectional view of an essential part showing a pivotally connecting part of the movable handle with respect to the fixed handle.

FIG. 15 is a vertical sectional view of an operation shaft attachment portion formed at the upper end of the movable handle.

FIG. 16 is a horizontal cross-sectional view of an operation shaft attachment portion similarly formed at the upper end portion of the movable handle.

FIG. 17 is a sectional view of the plug portion.

FIG. 18 is an explanatory diagram showing the shape of a hand when gripping a handle.

FIG. 19 is a side view showing an example of another form of the handle of the operation unit.

FIG. 20 is a side view showing another example of the form of the handle of the operation unit.

FIG. 21 is a side view showing still another example of the form of the handle of the operation unit.

FIG. 22 is a side view of the surgical forceps according to the fourth embodiment of the present invention.

FIG. 23 is a view on arrow H in FIG. 22.

[Explanation of symbols]

1 ... Surgical forceps, 2 ... Treatment part, 3 ... Operation part, 4 ... First handle, 5 ... Second handle, 8 ... Pivot pin, 11,
12 ... Ring, 13, 14 ... Finger hanging part, 21 ... Ratchet lever, 22 ... Slot, 23 ... Pivot pin, 41 ... Slot, 4
7 ... Attachment part, 48 ... Pivot pin.

Claims (1)

[Claims] 1. An operating portion, which rotatably supports a first handle and a second handle via a fulcrum, a treatment portion which is operated in association with a handle operation of the operating portion, and one of the one. A ratchet lever that is rotatably pivotally attached to the handle and is engaged with the other handle to restrict the handle operation of the operating portion, and a ratchet lever formed between the ratchet lever and the portion of the handle that pivotally attaches the ratchet lever. 1 space, a second space formed between the ratchet lever and a portion of the handle that engages the ratchet lever, and a member in a portion that pivotally connects the first handle and the second handle to each other. And a third space formed in the space, and at least one of the spaces is formed in a size that allows a cleaning brush to be inserted therethrough.