JPH08140985A - Operation forceps - Google Patents

Abstract

PURPOSE: To provide an operation forceps excellent in economical efficiency and washing properties. CONSTITUTION: This operation forceps is constituted so that an openable and closable forceps part 2 is arranged to the tip part of an insertion part 9 and a handle part 3 is connected to the base end part of the insertion part 9 and an operation shaft 6 opening and closing the handle part 3 and the forceps part 2 is arranged in the insertion part 9 and the handle part 3 and the forceps part 2 are provided so as to be separable at least one place of the opening and closing position of the handle part 3 and the operation shaft 6 is allowed to advance and retreat in response to the operation of the handle part 3 to open and close the forceps part 2. The handle part 3 and the operation shaft 6 are joined within a groove part 18 opened to a part of the handle part 3 and, at the time of the separation of the forceps part 2 and the handle part 3, the groove part 18 of the handle part 3 and the opening part thereof are positioned under the center axis of the operation shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical forceps having an openable forceps portion at a distal end portion of an insertion portion to be inserted into a living body.

[0002]

2. Description of the Related Art In a conventional surgical forceps, an insertion portion and a handle are arranged on a substantially straight line. Such surgical forceps have the advantage that when the handle is grasped with the hand, the direction in which the handle is grasped is the same as the direction in which the handle is grasped, and the operation such as rotating the hand is easy. Further, in such surgical forceps, a link mechanism is often used as a means for converting the opening / closing operation of the handle into the forward / backward movement of the operating shaft because it can transmit a large opening / closing force to the operating shaft. That is,
The opening / closing operation of the handle is transmitted to the link mechanism, and the operation shaft connected to the link mechanism moves back and forth to open and close the forceps portion at the tip. Such surgical forceps are widely used, for example, there is a handle for a surgical instrument shown in German Utility Model No. 9114674.7.

On the other hand, surgical forceps are required to be economical and easy to clean. Considering that point, for example, Japanese Patent Laid-Open No.
-115488 and Japanese Patent Application No. 6-179049 disclose a forceps part including an operating shaft that can be separated from a handle. When the forceps part separates from the handle,
First, from the economical point of view, it is not necessary to replace the entire forceps part by separating them when the forceps part is damaged, etc. The same effect as owning multiple surgical forceps is obtained. Next, in terms of cleanability, by separating the forceps part from the handle, a hidden part appears on the front surface, so that every corner can be cleaned, and the cleanability is facilitated.

However, for surgical forceps in which the forceps are separated, it is desired that the separation is simpler. On the other hand, conventionally, there has been a surgical forceps in which a handle is provided with a spring that exerts a force in either the opening or closing direction of the handle.
The purpose of providing the spring is to make opening and closing as easy as possible, and it is indispensable especially for surgical forceps in which the handle is not finger-hooked.

[0005]

However, conventionally,
In the surgical forceps in which the insertion portion and the handle are arranged in a straight line and the opening / closing operation of the handle is transmitted to the operation shaft via the link mechanism, there is no such thing that the forceps portion and the handle can be easily separated.

Since the link mechanism and the operation shaft cannot be easily separated from each other, the operation shaft and the link mechanism are conventionally connected by a screw or the like, which takes time and effort to separate them and the structure is complicated. There was also the problem that the screws themselves were difficult to clean. For this reason, the surgical forceps in which the insertion portion and the handle are arranged in a straight line are not very economical and easy to clean.

Further, in the surgical forceps in which the forceps part and the handle are separated depending on the opening / closing position of the handle, a new mechanism for limiting the opening / closing amount of the handle is required in order to prevent the forceps from being separated unexpectedly.

The present invention has been made in view of the above circumstances, and its purpose is to make the forceps part and the operating means on the proximal side, particularly the operating shaft and the link mechanism, easily separable, thereby improving the economy and cleaning. An object is to provide surgical forceps having excellent properties.

[0009]

In order to achieve the above-mentioned object, the present invention has a forceps part that can be opened and closed provided at the tip of an insertion part to be inserted into a living body, and the base end part of the insertion part. At least one link rotatably supported by the operating means is connected to the operating means on the hand side, and an operating shaft for opening and closing the forceps is movably arranged in the insertion portion. Means and the forceps part are provided so as to be separable at at least one of the open / close positions of the operation means, and in response to the operation of the operation means, the operation shaft is moved forward and backward via the link means to move the forceps. In the surgical forceps for driving the opening / closing portion, the operating means and the operating shaft are coupled in a groove opened in a part of the link means, and the groove of the link means is separated when the forceps portion and the operating means are separated. And the opening of this groove Characterized in that positioned below the central axis of the operating shaft.

[0010]

In the normal open / closed state, when the movable handle as the operating means is opened so as to move away from the fixed handle, the operation shaft advances, whereby the forceps part is opened and the movable handle is brought closer to the fixed handle. The operation shaft retracts and the forceps part closes. When removing the forceps part, by further opening the movable handle, the groove provided in the fixed handle is located below the operating shaft, so the connecting part of the operating shaft is disengaged from the groove and the insertion part is removed from the operating means. Can be separated.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a first embodiment. FIG. 1 is an overall view of surgical forceps, (a) is a view when a forceps portion is closed, (b) is a view in which the forceps portion is open, and FIG. 2 is an overall view of surgical forceps, (a) FIG. 3 is a diagram showing a forceps portion and a handle separated from each other, (b) is an enlarged view of a main portion where the forceps portion is separated from the handle, and FIG. 3 is a sectional view taken along line AA of FIG. 4 is a view from the arrow B of FIG. 1, FIG. 5 is a sectional view taken along the line CC of FIG. 4, FIG. 6 is a view for explaining the spring, and FIG. 7 is D of FIG.
It is a -D sectional view.

As shown in FIG. 1, the surgical forceps 1 comprises a forceps portion 2 and a handle portion 3 as an operating means. The forceps portion 2 and the handle portion 3 are separable as shown in FIG. The forceps portion 2 is composed of a movable jaw 4 that opens and closes and a fixed jaw 5. The movable jaw 4 is pivotally supported by the pivotal pin 4a with respect to the fixed jaw 5, and the movable jaw 4 opens and closes with respect to the fixed jaw 5. It is configured to be possible. further,
The forceps part 2 has an operation shaft 6 that is movable before and after transmitting the opening / closing operation to the movable jaw 4, a connecting part 7 for connecting to the handle part 3, and the like, and the end of the operation shaft 6 is the handle part 3. A ball-shaped coupling portion 8 is provided so as to be coupled with.

The handle portion 3 is composed of an insertion portion 9 made of an elongated pipe or the like, a movable handle 10 and a fixed handle 11. The movable handle 10 is rotatably supported by a pivot shaft 10a with respect to the fixed handle 11, and the movable handle 10 can be opened and closed with respect to the fixed handle 11.

A first link 12 and a second link 13, which are rotatably supported by the movable handle 10 and the fixed handle 11, and the movable handle 10 and the fixed handle 11 are temporarily engaged in the closing direction. A first ratchet 14 and a second ratchet 15 are provided, and a spring 16 such as a leaf spring that gives a repulsive force in the opening direction of the movable handle 10 is provided between the fixed handle 11 and the movable handle 10.

The first link 12 and the second link 13 of the movable handle 10 and the fixed handle 11 have the pivot pins 12a and 1 in the groove 17 which is formed in each handle.
The movable handle 10 is pivotally supported by 3a.
And the fixed handle 11 are rotatably connected by a connecting pin 11a.

Also, as shown in FIGS. 4 and 5, the second
The link 13 is formed with a groove portion 18 having an upper opening so that the coupling portion 8 of the operating shaft 6 can be coupled thereto. Also,
As shown in FIG. 7, the first and second ratchets 14, 15
At least one or more wedge-shaped tooth portions 19 are formed in each of them. The first ratchet 14 has a movable handle 1
A stopper rod 20 which is integral with a ratchet for preventing excessive closing of 0 is provided, and the tip of the stopper rod 20 contacts the fixed handle 11.

The insertion portion 9 penetrates the fixed handle 11, and a rubber cap 21 for keeping airtightness is provided at one end opened in the handle, and the other end has a connecting portion 7 of the forceps portion 2. A connecting portion 22 is provided for connecting with the. Further, a gap is provided between the rubber cap 21 and the fixed handle 11.

Further, one end of the spring 6 is pivotally supported on the fixed handle 11 by a fixing screw 6a, and the other end is shown in FIG.
A guide groove 23 is formed along the longitudinal direction as shown in FIG.
A guide groove 23 is guided by 4 and held slidably along a wall 25. Also, the guide groove 23
Has a notch 26 on the way and a notch 27 on the wall 25.
Is provided.

A cock 28 for cleaning the inside of the insertion portion 9 is provided in front of the fixed handle 11. In addition, the forceps portion 2, the handle portion 3, the spring 16 and the first
The second links 12 and 13 are provided at positions asymmetric with respect to the central axis of the handle portion 3 when viewed from above.

Next, the operation of the surgical forceps constructed as described above will be described. In the normal open / closed state,
(A) Open and close as shown in (b). That is, when the movable handle 10 is opened away from the fixed handle 11 by the biasing force of the spring 16, the first link 1
2 and the second link 13 rotate so as to fall forward, and the operation shaft 6 connected to the second link 13 is also pushed forward, whereby the movable jaw 4 of the forceps part 2 is also opened.

A guide rod 2 provided on the movable handle 10.
The movement of the spring 16 is restricted by the guide groove 4 and the guide groove 23, and the opening amount is restricted. When removing the forceps part 2, as shown by the chain line in FIG. 3, the movable handle 10 can be further opened by removing the spring 16 from the guide rod 24 through the notch 26 and over the notch 27. As shown in FIG. 2 (b), the forceps 2 is separated from the handle 3 by the second link 13 falling down to the position where the connecting portion 8 is removed and the groove 18 being positioned below the operating shaft 6. it can. On the contrary, separation is impossible unless the groove portion 18 of the second link 13 is located below the operation shaft 6.

When the movable handle 10 is closed against the urging force of the spring 16, the first and second ratchets 1 are closed.
The teeth 4 and 15 are engaged with each other by the wedge-shaped teeth 19, and the movement in the opening direction is restricted. When the movable handle 10 is opened from this state, when the movable handle 10 is further closed from the state where the tooth portions 19 are engaged, the first and second ratchets 1
4, 5 are released and the movable handle 10 can be opened. At this time, when the movable handle 10 is further closed, the stopper rod 20 at the tip of the first ratchet 14 strikes the fixed handle 11. When the movable handle 10 is opened, it can be easily opened by the force of the spring 16.

Although the spring 16 urges the movable handle 10 in the opening direction in the first embodiment, it may have a structure in which it acts in the closing direction. According to the first embodiment, the handle portion 3 and the insertion portion 9 are separable, and the link mechanism does not have a complicated attachment / detachment mechanism, which facilitates cleaning and manufacturing. Moreover, since the spring 16 is detachable, the forceps portion 2 and the handle portion 3 can be separated more easily. Also, the spring 16 itself is easy to clean.

Normally, the spring 16 limits the opening amount of the movable handle 10 and prevents the forceps 2 and the handle 3 from being separated from each other. Handle part 3 and second
Since the groove portion 17 penetrating the coupling portion of the link 13 is provided, the cleaning is easy.

Further, since the forceps 2 and the operating shaft 6 are displaced from the central axis of the handle portion 3, the whole can be made smaller, and a cock 28 for washing is provided on the handle portion 3, so that the washing is easier. There is.

8 to 10 show the second embodiment, and FIG.
9 is a plan view of the forceps portion, FIG. 9 is a side view thereof, and FIG. 10 is a perspective view of the forceps portion opened. As shown in FIGS. 8 to 10, a pair of openable and closable jaws 31 constituting the forceps portion 30 provided at the distal end portion of the insertion portion 9 is provided with a hole 32 at the distal end portion thereof. Sawtooth-shaped teeth 33 are radially formed around 32. Further, the intermediate portion 34 of the jaw 31 is formed in a constricted and narrow width.

According to the surgical forceps of this embodiment, the jaw 3
Since the teeth 33 are formed on the first portion, there is an effect that it is easy to operate to grip and tear slippery organs such as lymph nodes. Further, since the teeth 33 are radial, the gripped one is not slippery, and since the hole 32 is formed at the tip end, the gripped one is not slippery. Further, since the jaw 31 is formed in a narrow width in the middle thereof, there is an effect that the object to be grasped can be easily seen when grasping.

Although not particularly shown in this embodiment,
The insertion portion 9 may also be separable from the handle portion 3 through some attachment / detachment means. On the contrary, the insertion portion 9 and the handle portion 3 may be integrated.

FIG. 11 shows a modification. FIG. 11A shows a surgical forceps 35 having a pistol type handle, which is composed of a fixed handle 36 and a movable handle 37. Three
Reference numeral 8 is a spring that applies a force in the opening direction, and this spring 38 is provided with a guide groove (not shown). The fixed handle 36 pivotally supports one end of the spring 38, and the movable handle 37
A guide rod 3 slidably supporting the other end of the spring 38
9 is provided and is configured to slide and guide the guide groove.

Normally, the opening / closing amount of the movable handle 37 is limited by the guide groove of the spring 38, but as shown in FIG. 11B, the spring 38 is guided by the guide rod 39 when the forceps are separated.
The movable handle 37 can be widely opened and detached by removing the handle.

Normally, the movable handle 37 can be prevented from being excessively opened by the spring 38, and careless separation of the forceps can be prevented. According to the embodiment described above, the following configuration is obtained. (Supplementary Note 1) A forceps part that can be opened and closed is disposed at a distal end part of an insertion part to be inserted into a living body, a proximal side operation part is connected to a proximal end part of the insertion part, and the insertion part is provided in the insertion part. An operating shaft for opening and closing the forceps is arranged so that it can move forward and backward.
At least one link means pivotally supported by the operating means and the forceps portion are provided so as to be separable at at least one opening / closing position of the operating means, and in response to the operation of the operating means, In the surgical forceps for moving the operating shaft forward and backward through the linking means to open and close the forceps part, the operating means and the operating shaft are coupled in a groove formed in a part of the linking means. The surgical forceps characterized in that the groove of the link means and the opening of the groove are located below the central axis of the operation shaft when the forceps part and the operation means are separated. (Supplementary Note 2) The surgical forceps according to Supplementary Note 1, wherein the operating means is arranged substantially linearly with the insertion portion. (Supplementary Note 3) A forceps part that can be opened and closed is provided at the tip of the insertion part to be inserted into the living body, and the proximal operation part is connected to the proximal end part of the insertion part, and the operation part on the proximal side is connected to the insertion part. The operation shaft of the forceps part is provided so as to be able to move forward and backward, and the operation means and the forceps part are provided so as to be separable at at least one of the open / close positions of the operation means, and in response to the operation of the operation means, In the surgical forceps provided with a link means for moving the operating shaft forward and backward to open and close the forceps portion, and a biasing means for biasing the operating means in the opening direction or the closing direction, the biasing means comprises: A surgical forceps, which has a fixed position which is supported by one of the operating means and slidable by the other and a position which can be attached and detached while limiting the opening / closing amount of the operating means. (Supplementary Note 4) The operating means is composed of a handle and at least one link member which is provided on the handle and which converts the opening / closing operation of the handle so that the operating shaft of the forceps portion moves back and forth. The surgical forceps according to Supplementary Note 3. (Supplementary Note 5) The surgical forceps according to Supplementary Note 3 or 4, wherein the urging means has a guide groove, and the guide groove is guided by the guide means provided on one of the handles. (Supplementary Note 6) The surgical forceps according to Supplementary Note 5, wherein the guiding means is a guide rod. (Supplementary Note 7) The surgical forceps according to Supplementary Note 3, wherein the urging means is an elastic member. (Supplementary Note 8) The surgical forceps according to Supplementary Note 7, wherein the elastic member is a leaf spring.

[0032]

As described above, according to the present invention, the operating means and the operating shaft are connected in the groove formed in a part of the operating means, and the operating means is separated when the forceps part and the operating means are separated. By positioning the groove and the opening portion of the groove below the central axis of the operation shaft, the forceps portion and the operation means can be easily separated. Therefore, when the forceps portion is damaged, it is not necessary to replace the entire forceps portion by separating it, which is economically advantageous, and because the separation is possible, there is an effect that the cleaning ability is excellent.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of surgical forceps showing a first embodiment of the present invention.

FIG. 2 is a side view in which a part of the surgical forceps of the same embodiment is sectioned.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a view from the direction of arrow B in FIG.

5 is a cross-sectional view taken along the line CC of FIG.

FIG. 6 is a plan view of the spring according to the embodiment.

FIG. 7 is a cross-sectional view taken along the line DD of FIG.

FIG. 8 is a plan view showing the jaw of the surgical forceps showing the second embodiment of the present invention.

FIG. 9 is a side view of the same embodiment with the jaws closed.

FIG. 10 is a perspective view showing a state where the jaws of the embodiment are opened.

FIG. 11 is a side view showing a modified example of the surgical forceps of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Surgical forceps, 2 ... Forceps part, 3 ... Handle part, 6 ... Operation shaft, 8 ... Coupling part, 9 ... Insertion part, 10 ... Movable handle,
11 ... Fixed handle, 12 ... First link, 13 ... Second
Link, 18 ... Groove.

Claims (1)

[Claims] 1. A forceps part that can be opened and closed is provided at a distal end portion of an insertion portion to be inserted into a living body, a proximal side operation portion is connected to a proximal end portion of the insertion portion, and the insertion portion is provided in the insertion portion. At least one operation shaft for opening and closing the forceps is provided so as to be movable back and forth, and is rotatably supported by the operation means.
One link means and the forceps portion are provided so as to be separable at at least one of the open / close positions of the operating means, and move the operating shaft forward and backward via the link means in response to the operation of the operating means. In the surgical forceps for driving the forceps portion to open and close, the operating means and the operating shaft are coupled in a groove opened in a part of the link means, and the linking means of the link means is separated when the forceps portion and the operating means are separated. A surgical forceps characterized in that the groove and the opening of the groove are located below the central axis of the operation shaft.