JP2002011018A - Disassembling structure of handle part of endoscope operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disassembling structure of handle part of an endoscope operation device by which metal parts of the handle part are easily assorted when disused. SOLUTION: For the endoscope operation device, a handle part 2, inside of which reusable parts are incorporated, is composed of two parts 2B, 2C which are independent with each other, and those parts are assembled through connection parts 10, 11, 12, 13, and at least at a part of periphery of joining surface of parts 2B, 2C which are joined each other by a joining part of the handle part, in order to compulsorily separate joined surfaces from each other, a groove part 21 in which a tool or the like can be inserted, is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for disassembling a handle portion of a surgical instrument used in endoscopic surgery, and more particularly to a resin handle portion of a surgical instrument to be discarded after use. The present invention relates to a handle portion disassembling structure for facilitating separation of a metal part incorporated therein.

[0002]

2. Description of the Related Art In recent years, in surgical operations for treating diseases in the body cavity, there is less risk of infection than in open surgery.
Endoscopic surgery is often performed for reasons such as quick healing of the wound.

In endoscopic surgery, small holes are drilled in the chest and abdomen of a patient using a trocar at a plurality of locations, cannula tubes are inserted into body cavities from each of the holes, and the endoscope and the surgical instrument are individually separated. This is an operation performed by observing the affected part with an endoscope by inserting it into a cannula tube.

[0004] Surgical instruments such as forceps and clips used in endoscopic surgery are generally provided with an elongated shaft that is inserted into the chest or abdomen of a patient through a cannula tube, and this shaft is attached to the shaft. And a handle portion that is held by a surgeon by hand.

[0005] There are two types of surgical instruments of this type, disposable and reusable, and in the case of the former disposable, surgical instruments used for one patient are reusable. Need to be discarded.

[0006]

However, the conventional disposable surgical instruments as described above do not have a structure on the premise that metal parts and resin parts are separated and discarded. There is a problem that the processing cost of the product increases.

[0007] Therefore, when the surgical instruments are discarded after use, if the metallic components and the resin components can be separated and collected, the disposal cost of medical waste can be reduced.

However, conventional surgical instruments of this kind are assembled by assembling a resin handle having a metal part incorporated therein by a fixing means such as adhesion or welding. However, it cannot be easily disassembled, and there is a problem that it takes a lot of trouble and time to separate metal parts from the handle portion.

Accordingly, the present invention solves the above-mentioned problems of the prior art, and disassembles a handle portion of an endoscopic surgical instrument capable of easily separating a metal part in the handle portion at the time of disposal. The purpose is to provide a structure.

[0010]

According to a first aspect of the present invention, a handle portion disassembly structure of an instrument for endoscopic surgery according to the present invention comprises a plurality of independent handle portions. The present invention is applied to an endoscopic surgical instrument in which these portions are connected at a connecting portion and are integrally assembled.

[0011] In the first embodiment, at least a part of the outer periphery between the joint surfaces of the portions interconnected by the joint portion of the handle portion, these joint surfaces are pushed apart to force the joint portion. A groove is formed in which a tool or the like for separation can be inserted.

In a second embodiment of the handle portion disassembling structure of the instrument for endoscopic surgery according to the present invention, the handle portion comprises left and right portions which are independent of each other, and these portions are connected by a connecting portion. The present invention is applied to an endoscopic surgical instrument which is integrally assembled and has an operation lever rotatably supported on a handle portion.

In the second embodiment, a separation cam surface is provided on a part of the operation lever, and at least one of the left and right portions of the handle is separated at a rotation position exceeding a normal operation range of the operation lever. A cam contact surface that comes into contact with the cam surface is provided, and the separating cam surface presses the cam contact surface to separate the left and right parts of the handle part by turning operation of the operation lever away from the normal operation range, connecting Parts are forcibly separated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a handle disassembly structure for an endoscopic surgical instrument according to the present invention is a forceps or clip attaching device in which a handle is composed of a plurality of independent parts.
It can be widely applied to automatic suturing devices and the like.

In these endoscopic surgical instruments, a handle portion containing a movable part therein is formed by combining a plurality of independent portions formed of a resin material, and these portions are connected via a connecting portion. And are integrally connected.

The plurality of portions constituting the handle portion can be constituted, for example, as two portions that divide the handle portion into left and right portions.
The dowel holes formed at the opposing positions of the two parts and the dowels whose both ends are press-fitted into these dowel holes can be formed. Alternatively, hook-shaped connecting portions may be provided at opposing positions inside left and right portions of the handle portion, and these may be engaged with each other to integrally connect the two portions.

The connecting portion may be provided at one or more locations, for example, two
Can be provided at these points, and these connecting portions separate or disengage with a certain force or more when an external force that pulls apart acts between the interconnecting handle portions, or It suffices if it is broken so that the connected portions are separated.

Further, the handle portion may be composed of a portion divided in a vertical direction or a front-rear direction.
Three or more parts may be assembled to one handle part by a connection part.

In the first embodiment of the handle part disassembly structure of the present invention, in order to forcibly separate the connecting part, at least a part of the outer periphery between the joining surfaces of the parts connected to each other by the connecting part is provided with a groove. Is formed.

[0020] By inserting and prying a tool such as a flathead screwdriver into the groove, the joint surfaces are pushed apart and the connecting part is separated. In addition, the groove may be formed in a shape that allows a coin to be inserted in place of a driver and used. It should be noted that "tools and the like" described in claim 1 include coins that can be used similarly to a minus driver.

The groove portion may be provided continuously on the entire outer periphery between the joint surfaces of the mutually connected portions of the handle portion connected by the connecting portion, or may be provided only on a part thereof. Further, the groove may be provided on only one side of the joining surface between the portions connected by the connecting portion, or may be provided over both joining surfaces.

A second disassembly structure of the handle portion of the endoscopic surgical instrument according to the present invention is such that the handle portion is composed of independent left and right portions, and these left and right portions are
Similar to the first embodiment, forceps connected via one or more connecting portions and having an operation lever rotatably supported on the handle portion. And a clip attaching device, an automatic suturing device and the like.

The second embodiment of the handle portion disassembly structure of the instrument for endoscopic surgery according to the present invention is for opening and closing a finger for grasping a body tissue of a forceps, and for driving a clip with a clip attaching device. By rotating the operating lever provided to the position beyond the operating range in normal use, the connecting portion connecting the left and right portions of the handle portion is forcibly separated. .

For this purpose, the operation lever is provided with a separation cam surface, and the separation cam surface is provided on at least one of the left and right portions of the handle at a position where the operation lever is beyond the normal operation range. When the operating lever is further rotated away from the normal operation range, the separation cam surface pushes the cam contact surface to separate the left and right portions of the handle portion when the operating lever is further rotated away from the normal operation range. I do.

The separation cam surface can be constituted by, for example, a wedge-shaped inclined surface formed on both left and right sides of the operation lever so as to be inclined in the rotation direction of the operation lever. The contact surface can be constituted by an inclined surface formed inside each of the left and right portions of the handle portion and inclined in the same direction as the wedge-shaped inclined surface.

The separation cam surface is provided on one of the left and right side surfaces of the operation lever, and the handle portion has a cam contact surface on only one of the left portion and the right portion opposed to the separation cam surface. May be provided.

Further, the contours of the separation cam surface provided on the operation lever and the cam contact surface which comes into contact with the separation cam surface provided on the handle portion side are not limited to the above-mentioned shapes. Any shape may be used as long as the left and right portions of the handle can be separated from each other by turning away from the normal operation range.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a forceps for endoscopic surgery as a first embodiment of a handle portion disassembly structure of an instrument for endoscopic surgery of the present invention, wherein a forceps 1 is a handle portion 2 made of resin.
And a metal elongated shaft 3 projecting forward from the front end of the handle 2.

At the front end of the shaft portion 3, there is provided a finger support portion 5 on which a pair of fingers 4 are pivotally mounted so as to be openable and closable. The operation lever 6 which is rotatably supported by the lever is opened by rotating backward (direction a in the drawing) and closed by rotating forward (direction b in the drawing). .

A ratchet release switch 7 is provided below the front end of the handle portion 2 so as to be slidable substantially in the front-rear direction with respect to the handle portion 2. A finger rotation knob 8 is attached to the handle portion 2 above the ratchet release switch 7.

By turning the finger rotation knob 8 by hand, the shaft portion 3 can be rotated integrally with the finger support portion 5 around the center axis thereof.
By turning the direction of the body, it is possible to grasp the tissue in the body in various directions.

A terminal 9 is provided at the top of the handle 2 so as to protrude rearward. The terminals 9 are electrically connected to the pair of fingers 4. When the terminals 9 are energized from an external power supply (not shown), the
An electric current is applied to the body tissue grasped by the operator to perform treatment such as hemostasis.

FIG. 2 is a perspective view showing a state in which the handle portion 2 of the forceps 1 is disassembled. The handle portion 2 is composed of a right portion 2B including most of the finger hook ring 2A and a remaining left portion 2C. And from the left and right.

These two portions 2B and 2C are provided with dowel holes 1 formed at two opposing positions on the inside.
The small-diameter portions at both ends of the dowel pins 12 and 13 are press-fitted into 0 and 11 to be assembled integrally. In addition,
The dowel holes 10 and 11 and the dowel pin 1
2 and 13 correspond to the connecting portion in the invention described in claim 1.

A small serration is formed on the outer peripheral surface of the small diameter portion near both ends of the dowel pins 12 and 13 so as to frictionally engage with the inner peripheral surfaces of the dowel holes 10 and 11. The two parts that make up 2
B and 2C are firmly connected to each other so as not to be separated in a normal use state.

The operation lever 6 is rotatably supported around a shaft 14 protruding inside the right side portion 2B of the handle portion 2, and a finger opening / closing finger slidably penetrating the inside of the shaft portion 3. The rod 15 is rotatably connected to a connection pivot 16 at the rear end.

The front end of the finger opening / closing rod 15 is linked to the pair of fingers 4 so that the rotation of the operation lever 6 is converted into the opening / closing movement of the pair of fingers 4.

The vicinity of the rear end of the finger opening / closing rod 15 is electrically connected to the terminal 9 via the conductive plate 17 so that electricity is supplied from the terminal 9 to the pair of fingers 4 through the finger opening / closing rod 15. It has become.

On the other hand, the operating lever 6 is formed with saw-shaped ratchet teeth T. The ratchet teeth T are engaged with the claws t formed on the ratchet 18 so that the finger 4 can be opened. The rotation of 6, ie,
The rotation in the direction a in FIG. 1 is locked.

The ratchet 18 is rotatably supported by a shaft 19 protruding inside the right side portion 2B of the handle portion 2 similarly to the shaft 14, and the pawl t is always brought into contact with the ratchet teeth T by a ratchet spring 20. It is urged to engage.

The ratchet 18 is slid forward by moving the ratchet release switch 7 forward.
The pawl t is held apart from the ratchet teeth T, and the finger 4 can be opened in this state.

The forceps 1 configured as described above is
The handle portion 2 includes components made of a metal material such as the terminal 9, the ratchet spring 20, the conductive plate 17, and the finger opening / closing rod 15. These components are used when the used forceps 1 are discarded. It is separated from the handle part 2.

When disassembling the handle portion 2 of the used forceps 1, the right portion 2B and the left portion 2C connected by the dowel pins 12 and 13 are separated. In order to facilitate this operation, in the forceps 1 of this embodiment, FIGS.
As shown in FIG.
A groove 21 into which a tool such as a flathead screwdriver can be inserted, on the front side and the rear side of the outer periphery of the joint surface between B and the left side portion 2C,
22 are formed.

The grooves 21 and 22 are provided in the handle 2
The two sides 2B, 2C are each formed at a half width in opposition to the same outer peripheral portion of the joining surface of the joints 2B, 2C. When these parts 2B, 2C are combined into one, a flathead screwdriver or the like is used. The cutting edge is formed so as to be a groove having a width that can be inserted.

FIG. 5 shows the shape of the groove 21 when viewed from the front of the disassembled handle portion 2. Although not shown, the groove 22 on the rear side has the same shape.

In this embodiment, the two portions 2B and 2C of the handle portion 2 are connected to each other by connecting the dowel pins 12 arranged near the upper portion of the finger hook 2A of the handle portion 2 and the rear upper end of the handle portion. , 13, the two grooves 21, 22 are provided at positions near the dowel pins 12, 13 on the outer periphery of the handle 2.

When disassembling the handle portion 2, first, a tool such as a flathead screwdriver is inserted into one of these grooves 21 and 22, and prying is performed, so that the two portions 2B, 2B
If there is a slight gap between the joining surfaces of C, then replace the tool in the other groove and pry in the same way.
By working so that the gap between B and 2C increases substantially uniformly, these dowel pins 12 and 13 come out of the respective dowel holes 10 and 11, and the handle part 2 is easily disassembled into two parts 2B and 2C. can do.

Next, FIG. 6 is a perspective view of an endoscope operation clip attaching device as a second embodiment of the handle portion disassembly structure of the endoscope operation instrument of the present invention. Clip attaching device 31
Is a surgical instrument used for performing endoscopic surgery for closing and closing a tubular organ such as a blood vessel or an intestine using a substantially U-shaped clip to perform hemostasis and the like, and a resin handle. It has a portion 32 and a metal elongated shaft portion 33 protruding forward from the front end of the handle portion 32.

A plurality of clips for mounting on a blood vessel or the like are accommodated in the shaft portion 33 so as to be arranged in the axial direction.
Each time the grip 32A of the handle portion 32 is gripped by the hand and the operating lever 34 is pulled once, one by one is supplied between the pair of clip mounting claws 35, and these clip mounting claws 35 are substantially U-shaped. The clip is configured to be pressed from both right and left sides to perform an operation of attaching the clip to a blood vessel or the like.

At the front end of the handle portion 32, a rotation knob 36 is attached integrally with the shaft portion 33 and a pair of clip mounting claws 35 so as to be rotatable around the central axis of the shaft portion 33. By turning the rotation knob 36 by hand, the direction of the clip mounting claw 35 can be rotated according to the direction of the clip mounting site such as a blood vessel.

The clip attaching device 31 of this embodiment has a built-in counter mechanism for counting the number of remaining clips housed in the shaft portion 35, and is formed at the rear of the left side surface of the handle portion 32. The remaining number of clips is displayed on the displayed display window 37.

FIG. 7 is an exploded perspective view of the handle portion 32 of the grip attachment device 31. As shown in FIG. 7, the handle portion 32 is composed of a right-hand portion 32B and a left-hand portion 32C which are substantially symmetrical left and right. And are assembled together.

Inside the handle portion 32, the operation of feeding the clip housed in the shaft portion 33 to the pair of clip mounting claws 35 and closing the clips by displacing the clip mounting claws 35 in the closing direction are performed. The operation lever 3 is attached to a movable member (not shown) in the shaft portion 33 which performs an operation of attaching to the shaft.
A push plate 38 for transmitting the operation of No. 4 is incorporated.

At the rear of the push plate 38, a guide pin holding portion 38A through which a guide pin 39 passes is formed. The push plate 38 is constantly urged in the backward direction by a return spring 40 formed of a compression coil spring interposed between the push plate 38 and the handle portion 32.

The guide pin 39 is provided with a guide pin holding portion 38.
A is formed at the upper end of the operation lever 34 shown in detail in FIG.
Is disposed in the pin engagement hole 34B.

The operating arm 34A has a slit 34C formed at the center thereof, and the flat pin holding portion 38A of the push plate 38 is inserted into the slit 34C.

The operating lever 34 includes an operating arm 34A.
A pair of separation cam surfaces 34E that are tapered in a wedge shape from both left and right sides toward the rear are formed below the pair. The role of the separation cam surface 34E will be described later.

Next, FIG. 9 shows the handle portion right side portion 32B.
10, FIG. 10 is a cross-sectional view taken along the line XX in FIG. 9 and viewed from the direction of the arrow. FIG. 11 is an inside side view of the handle portion left portion 32C, and FIG.
FIG. 5 is a cross-sectional view taken along the line XX in FIG.

As shown in FIGS. 9 and 11, inside the right side portion 32B and the left side portion 32C of the handle portion 32, operation lever shafts J are formed so as to protrude at opposing positions, respectively. When the lever shaft J is inserted into the shaft hole 34D from both sides of the operation lever 34 shown in FIG. 8, the operation lever 34 is rotatably supported by the handle portion 32.

A guide groove which engages both ends of the above-described guide pin 39 and guides it slidably in the front-rear direction is provided between the inside of the right side portion 32B of the handle portion 32 and the inside of the left side portion 32C. G1 is formed.

The inner peripheral edge of the right side portion 32B of the handle portion 32 is formed with a concave fitting groove G2 which is continuous over substantially the entire periphery thereof, and the fitting groove G2 is opposed to this. A continuous ridge P formed on the inner peripheral edge of the left portion 32C is fitted, and the right portion 32B and the left portion 3 are fitted.
The 2C and the 2C can be combined together without any step.

In order to simplify the structure of the handle portion 32, the fitting grooves G2 and the ridges P are omitted, and the opposing surfaces of the inner peripheral edges of the left and right portions 32B and 32C are formed flat. Alternatively, a structure may be adopted in which these facing surfaces are abutted with each other.

As shown in FIGS. 9 and 10, a plurality of dowels D protrude from the inside of the right part 32B, and these dowels D are opposed to the left part 32C shown in FIGS. Into the dowel hole H formed in
The portions 32B and 32C on both sides are firmly connected by frictional engagement between the dowels D and the dowel holes H.

In this embodiment, the dowels D are formed with split grooves. When the dowels D are press-fitted into the dowel holes H, the dowels D are elastically deformed so that the split grooves are narrowed. ing. The dowel D and the dowel hole H in this embodiment correspond to the connecting portion in the invention described in claim 2.

On the other hand, as shown in FIGS. 9 and 11, a low rib R1 and a high rib R2 are formed inside the right and left portions 32B and 32C of the handle portion 32, respectively. R1 and R2 are connected by a rib R3 which is linearly inclined.

The inclined ribs R3 are provided at positions where the left and right separation cam surfaces 34E come into contact with each other when the operation lever 34 is rotated further forward than the normal operation range.

In this embodiment, the separation cam surface 3
The inclined surfaces of these ribs R3 which come into contact with the ribs 4E are defined in claim 2.
This corresponds to the cam contact surface in the invention described in (1).

When the operating lever 34 is pulled, the operating arm 34 of the clip mounting device 31 configured as described above is pulled.
The side A rotates forward around the operation lever axis J, and the push plate 38 connected to the pin engagement hole 34B via the guide pin 39 moves forward against the urging force of the return spring 40.

When the push plate 38 advances, one of the clips housed in the shaft portion 33 is supplied between the pair of clip mounting claws 35 and mounted on a blood vessel or the like.

Further, in this embodiment, each time the operating lever 34 is operated once, the feed pawl 41 connected to the push plate 38 via the guide pin 39 forms the side face of the counter mechanism 40. Is rotated by one tooth to reduce the number of remaining clips displayed through the display window 37 one by one.

Next, when the clip mounter 31 is disassembled after use and the reusable part in the handle portion 32 is taken out, as shown in FIG. Then, it is turned forward with force in the direction of arrow A.

Then, the low-strength operating arm 34A provided on the operation lever 34 is broken by the stopper pin P1 provided on the handle portion 32, which normally limits the rotation range of the operation lever 34. Thus, the remaining portion of the operation lever 34 can be turned to the position shown in FIG.

By rotating the operation lever 34 in the direction opposite to the normal direction, the left and right separation cam surfaces 34E formed on the operation lever 3 are respectively attached to the right portion 32B and the left portion 32C of the handle portion 32. The ribs R3 are pushed right and left on the formed linearly inclined ribs R3.

As a result, the right side portion 32 of the handle portion 32
The dowel D provided on the B side is forcibly extracted from the dowel hole H provided on the left portion 32C, and the handle portion 32 is disassembled into a right portion 32B and a left portion 32C.

In the handle portion 32 thus disassembled, the shaft portion 33 and the rotary knob 36 are separated, and the metal parts inside are separated.

[0076]

As described above, according to the handle disassembly structure of the endoscopic surgical instrument of the present invention, the metal parts in the handle can be easily separated, thereby reducing the cost of disposal after use. Can be reduced.

In particular, according to the first aspect of the invention, the handle portion of the endoscopic surgical instrument can be easily disassembled with a simple tool such as a screwdriver, and the metal parts in the handle portion can be easily disassembled. Separation work can be performed efficiently.

In particular, according to the second aspect of the present invention, the operator can easily disassemble the handle of the endoscopic surgical instrument without using any tools, and the operator can easily disassemble the handle. The work of sorting metal parts can be performed more efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view of a forceps for endoscopic surgery as a first embodiment of a handle portion disassembly structure of an instrument for endoscopic surgery of the present invention.

FIG. 2 is an exploded perspective view of the forceps shown in FIG.

FIG. 3 is an inside side view of a right part of a handle of the forceps shown in FIG. 1;

FIG. 4 is an inside side view of a left portion of a handle portion of the forceps shown in FIG. 1;

FIG. 5 is an exploded view of a handle portion of the forceps shown in FIG. 1 as viewed from the front.

FIG. 6 is a perspective view of a clip mounting device for endoscopic surgery as a second embodiment of the handle portion disassembly structure of the endoscopic surgical instrument of the present invention.

FIG. 7 is an exploded perspective view of a main part of the clip attaching device shown in FIG. 6;

8 is a perspective view of an operation lever used in the clip attaching device shown in FIG.

9 is an inside side view of the right side of the handle of the clip attaching device shown in FIG. 6;

FIG. 10 is a cross-sectional view taken along a line XX in FIG.

11 is an inside side view of a left side of a handle portion of the clip attaching device shown in FIG. 6;

12 is a cross-sectional view taken along the line XX in FIG.

13 is a view showing a state in which an operation lever of the clip attaching device shown in FIG. 6 is turned to an exploded position.

[Explanation of symbols]

1 forceps, 2 handle, 2A finger ring, 2B right side, 3 shaft, 4 finger, 5 finger support, 6 operation lever,
7 Ratchet release switch, 8 Finger rotation knob, 9 Terminal, 10, 11 Dowel hole, 12, 1
3 Dowel pin, 14 axis, 15 finger open / close rod, 16 connecting pivot, 17 conductive plate,
18 ratchet, 19 axis, 20 ratchet spring, 21, 22 groove, 31 clip mounter, 32 handle, 32A grip,
32B right part, 32C left part, 33
Shaft, 34 operating lever, 34A operating arm,
34B pin engagement hole, 34C slit, 34D
Shaft hole, 34E separation cam surface, 35 clip mounting claw, 36 rotation knob, 37 display window, 38
Push plate, 38A guide pin holder, 39 guide pin, 40 return spring,
41 feeding claw, 42 counter mechanism.

Claims (2)

[Claims] An endoscope surgical instrument in which a handle portion is composed of a plurality of portions independent of each other, and these portions are connected to each other by a connecting portion and are integrally assembled. At least a part of the outer periphery between the joining surfaces of the connected portions is formed with a groove portion into which a tool or the like for pushing and expanding these joining surfaces to forcibly separate the connecting portion can be inserted. Disassembly structure of the handle part of the endoscopic surgical instrument. The handle portion is composed of left and right portions which are independent of each other, these portions are connected to each other by a connecting portion and are integrally assembled, and the operation lever is pivotally supported by the handle portion so as to be rotatable. In the endoscopic surgical instrument, a separation cam surface is provided on a part of the operation lever, and at least one of the left and right portions of the handle portion has a separation cam surface at a rotation position beyond a normal operation range of the operation lever. The separation cam surface presses the cam contact surface and pushes the left and right parts of the handle part apart by turning the operating lever away from the normal operation range, thereby separating the connecting portion. A handle disassembly structure for an endoscopic surgical instrument, wherein the handle portion is forcibly separated.