CN103181801B - Linear suturing and cutting instrument - Google Patents

Abstract

The invention discloses a linear suturing and cutting instrument, which comprises an upper forceps holder, a lower forceps holder, ejector pin rods capable of moving simultaneously, a push-type cutter arbor with a cutter at a far end, a locking piece and a slide block which are pluggable mutually, and two push buttons symmetrically and pivotally arranged on two sides of the locking piece. When the slide block is plugged with the locking piece, the two push buttons are drawn in two sides of the lower forceps holder; and when the slide block is separated from the locking piece, only one push button is opened and is relatively fixed on the slide block, and the other push button is drawn in and is relatively fixed on the locking piece. The linear suturing and cutting instrument has the beneficial effects that the two push buttons are simultaneously drawn in and clung to the forceps holders, so that the size of the whole instrument can be relatively reduced, and the packaging and transportation cost can also be relatively reduced; when one of the two push buttons pushes the slide block to move, the other push button is fixed on the locking piece, so that the occurrence of the phenomenon that the push button at a non-working state is moved to clamp a medical glove of a doctor is avoided; and the linear suturing and cutting instrument has a simple structure, is convenient to assemble, and is very practical.

Description

Linear Seam Cutter

technical field

The invention relates to a medical stapling device, in particular to a linear sewing cutter for surgical operations, belonging to the technical field of medical instruments.

Background technique

Surgical linear suture cutters are widely used for wound suturing, internal tissue suturing and cutting. A typical linear sewing cutter, as disclosed in US Pat. No. 5,129,570, has two functions of suturing and cutting at the same time, that is, excess tissue is excised while suturing the wound. This type of linear seam cutter generally includes two upper and lower jaws, an anvil and a staple bin that are relatively arranged at the far ends of the upper and lower jaws, and a closing handle for closing the upper and lower jaws; There is a pusher rod that can move simultaneously along the axis of the instrument and a pusher rod with a cutter at the far end. Both the pusher rod and one end of the pusher rod are arranged on a slider; A number of nail holes are arranged along the axis of the instrument, and each nail hole is provided with a nail pusher and a staple; the slider moves to drive the nail pusher to push the nail pusher in turn and push the staple toward the nail The anvil is formed on the tissue to be sutured, and drives the cutting knife to cut or incision the tissue between the staple cartridge and the anvil.

The push buttons that all instruments are used to drive the slider to move are generally arranged on the outside of the upper and lower jaws, so that the doctor can operate, such as US Patent No. A moving push button, the push button is relatively fixed to the slide block, and protrudes from the left or right side of the upper and lower jaws. The disadvantage of the push button of this structure is that the doctor can only push the push button on one side of the upper and lower jaws. Once the instrument is placed in a special operating position, the doctor cannot control the push button well. It will greatly reduce the operating comfort of the linear seam cutter. And on the other hand, the doctor's right-handedness will also cause inconvenience in the use of the device.

In order to solve the above-mentioned technical problems, U.S. Patents US7419081 and US7568604 disclose a new type of "W"-shaped push button structure, which is pivotally connected with the slider so that the two operating parts of the push button can be selectively extended. out of the jaws of the instrument. When the doctor needs to push the push button from the left side, the push button operating part on the left side of the clamp is stretched out of the clamp, and at this time, the push button operating part on the right side of the clamp is closed and tightly attached to the clamp. Generally speaking, a plastic jaw shell for protecting the jaw is fixed on the outside of the jaw, and the retracted push button operation part will be tightly attached to the jaw shell. The disadvantage of the push button with this structure is that the operating parts on both sides of the push button cannot be folded at the same time, which will increase the overall space of the device and increase the packaging and transportation costs. And the prior art also has a major problem: when the doctor pushes the left side push button operating part stretching out of the clamp, the push button operating part on the right side that is close to the clamp will also follow. The sliders move together. Since the doctor’s operating habit is to hold the clamp shell with his hands, the push button operation part on the right will pass through the gap between the doctor’s palm and the clamp shell, and the push button on the right will operate During the movement of the part, it is very likely that the doctor's medical gloves will be caught between the push button operation part and the jaws, so that the push button cannot move forward and backward, resulting in medical accidents.

Contents of the invention

The object of the present invention is to propose a linear seam cutter with a novel push button, which can be folded and tightly attached to the jaws at the same time.

The purpose of the present invention will be achieved through the following technical solutions:

A linear sewing cutter, comprising: upper and lower jaws that can be closed or opened mutually, and a nail anvil and a nail bin that are respectively arranged at the far ends of the upper and lower jaws; The linear seam cutter axially moves the nail pusher rod and the pusher rod with a cutter at the far end, and the linear seam cutter also includes:

a lock block, the lock block is fixed on the lower jaw;

A slider, one end of the nail pusher rod and the knife pusher rod are both arranged on one side of the slider, the slider is detachably connected to the lock block and can move relative to the lock block;

The two push buttons symmetrically arranged on both sides of the lock block are respectively a left push button and a right push button, and the left push button and the right push button are both pivotally arranged on the lock block or the slider;

When the slide block is connected with the lock block, the left push button and the right push button are in the initial state, and both are gathered on both sides of the lower jaw; when the slide block is separated from the lock block , there is one and only one push button that is opened and relatively fixed on the slider, and the other push button is folded and relatively fixed on the lock block.

Preferably, one side of the slider is plugged and connected to the lock block along its axis.

Preferably, the lock block includes a body for fixing with the clamp, and two elastic protruding arms are symmetrically extended on the front end of the body, and the elastic protruding arms are folded towards each other without force, and after being folded The distance between the two elastic protruding arms is smaller than the insertion part of the slider.

Preferably, the top of the lock block is provided with an incomplete circular first locking hook, and the top of the slider is correspondingly provided with an incomplete circular second locking hook. When inserted and connected to the lock block, the first locking hook and the second locking hook form a complete circle.

Preferably, a circular groove is provided at the contact between the ring and the top of the locking block and the slider, and a circular protruding line is respectively provided on the left push button and the right push button.

Preferably, the top surface of the elastic protruding arm is provided with a protrusion for restricting the protrusion from sliding in the groove.

Preferably, the left push button and the right push button are provided with a wedge-shaped surface, and the two wedge-shaped surfaces are arranged symmetrically and correspondingly. When one of the push buttons is opened and protrudes outside the lower jaw, The two wedge-shaped surfaces respectively arranged on the left push button and the right push button fit together. This structure makes the present invention have one and only one push button that can be opened and stretched out of the lower jaw

Preferably, a rear limiting boss is also provided on the top surface of the slider, a through hole is provided in the rear limiting boss, and a bolt column is slidably arranged in the through hole; correspondingly, Both the left push button and the right push button are provided with an arc groove for avoiding the rear limiting boss, and a round hole for inserting the peg.

Preferably, the bottom of the peg is a wedge-shaped base that cooperates with the lower jaw and is driven by the lower jaw.

Preferably, a front limiting boss is also provided on the top surface of the slider, and when one of the push buttons is opened and protrudes out of the lower jaw, the push button and the front The limit boss matches.

The beneficial effects of the present invention are mainly reflected in:

(1) The two push buttons are folded together and tightly attached to the clamp, which can relatively reduce the overall volume of the device, and the packaging and transportation costs will also be relatively reduced;

(2) When one of the two push buttons pushes the slider to move, the other push button is fixed on the lock block, so as to avoid the situation that the non-working push button moves and gets caught in the doctor's medical gloves;

(3) The structure is simple, the assembly is convenient, and it is very suitable for practical use.

Description of drawings

Fig. 1 is a three-dimensional schematic view of the locking block of the linear seam cutter of the present invention.

Fig. 2 is a front view of the locking block of the linear sewing cutter of the present invention.

Fig. 3 is a three-dimensional schematic view of the slider of the linear seam cutter of the present invention.

Fig. 4 is another perspective view of the slider of the linear seam cutter of the present invention.

Fig. 5 is a three-dimensional sectional view of the slider of the linear seam cutter of the present invention.

Fig. 6 is a three-dimensional schematic view of the push button of the linear seam cutter of the present invention.

Fig. 7 is another perspective view of the push button of the linear seam cutter of the present invention.

Fig. 8 is a partial perspective view of the linear seam cutter of the present invention, and only one push button is shown at this time.

Fig. 9 is a front view of the tail of the linear seam cutter in the initial state of the present invention.

Fig. 10 is a top view of the tail of the linear seam cutter in the initial state of the present invention.

Fig. 11 is a front view of the tail of the straight line cutter of the present invention when one of the push buttons is opened.

Fig. 12 is a top view of the tail when one of the push buttons is opened of the linear seam cutter of the present invention.

Fig. 13 is a sectional view along A-A in Fig. 12 .

Fig. 14 is a partial front view of the linear sewing cutter of the present invention after pushing one of the push buttons.

Figure 15 is a partial front view of the pushed push button of the linear sewing cutter of the present invention.

Fig. 16 is a partial top view of the linear sewing cutter of the present invention after pushing one of the push buttons.

Fig. 17 is a partial top view of the pushed push button of the linear sewing cutter of the present invention.

Fig. 18 is a cross-sectional view along B-B in Fig. 17 .

Detailed ways

The invention discloses a linear seam cutter, which, like the prior art, includes: upper and lower jaws that can be closed or opened mutually, the distal end of the upper jaw is provided with an anvil, and the distal end of the lower jaw is A staple magazine is provided, and a closing handle for closing the upper and lower jaws is pivotally arranged on the lower jaw.

The lower jaw 1 is ∪-shaped, in which there is a pusher rod 2 that can slide along the axis of the instrument and a pusher rod 3 with a cutter at the far end (revealed in Figure 8), and the staple cartridge 7 set within the U-shaped structure.

In a preferred embodiment of the present invention, the linear seam cutter also includes: a lock block 4, the lock block 4 is fixed on the lower jaw 1; a slider 5, the push nail rod 2 and the push knife One end of the rod 3 is arranged on one side of the slider 5, and the other side of the slider 5 is connected to the lock block 4 along its axis in a plug-in manner; The two push buttons are a left push button 61 and a right push button 62 respectively, and the left push button 61 and the right push button 62 are both pivotally arranged on the locking block 4 or the sliding block 5 .

Specifically referring to Fig. 1 and Fig. 2, the lock block 4 includes a body 41 for fixing with the clamp, and two elastic protruding arms 42 extend symmetrically from the front end of the body 41, and the elastic protruding arms 42 are not affected by the force. Under the condition of force, they are folded toward each other (the direction of the arrow in the figure), and the distance between the two elastic protruding arms 42 after being folded is smaller than the insertion portion 52 of the slider 5 .

As shown in FIG. 3 to FIG. 5 , the slider 5 includes a body 51 , and the rear end of the body is an insertion portion 52 for inserting into the locking block 4 . When the insertion portion 52 extends into the gap 43 between the two elastic protrusions 42 , the insertion portion 52 is thicker, so the elastic protrusions 42 will be pushed outward. In this way, the elastic protruding arm 42 will generate a clamping force on the slider 5, so that the lock block 4 and the slider 5 are fixed together in the initial state.

1 to 5, the top 44 of the locking block 4 is provided with an incomplete circular first locking hook 45, and the top 54 of the slider 5 is correspondingly provided with an incomplete circular second hook. The lock hook 55, when the slider 5 is inserted along its axis and connected to the lock block 4 (described in detail above), the first lock hook 45 and the second lock hook 55 form a complete circle Ring 90, the ring here is a closed ring in a broad sense, not a regular ring in a narrow sense, as shown in FIG. 8 .

A circle of grooves 91 is provided at the contact between the ring 90 and the tops 44, 54 of the lock block 4 and the slider 5, and the grooves 9 of the circle are respectively the grooves 46 of the lock block 4 and the grooves of the slider 5. Groove 56 is formed by splicing. As shown in FIG. 6 and FIG. 7 , the right push button 62 is correspondingly provided with a round convex strip 63 . Since the structure of the left push button 61 is symmetrical to that of the right push button 62, the specific structure of the push button is disclosed by taking the right push button 62 as an example. After the protruding strip 63 is snapped into the groove 91 , the protruding strip 63 can slide freely in the groove 91 . During installation, the lock block 4 can be fixed on the lower jaw (there are many ways to fix it, so I won’t go into details), and then the convex strip 63 is snapped into the groove 46, and then the slider 5 is inserted into the lock Fixed in block 4.

Preferably, the top surface 44 of the lock block 4 is located above the elastic arm 42 and is provided with a protrusion 47 for restricting the protrusion 63 from sliding in the groove 46 . In the initial state, the locking block 4 and the sliding block 5 are fixed to each other, and the elastic protruding arms 42 on both sides expand outwards, causing the position of the protrusion 47 to shift, that is, away from the groove 46 . When the slide block 5 disengages from the lock block 4, the elastic protruding arm 42 is concaved inwardly, and at this moment, the protrusion 47 will be located on the groove 46, so that the protrusion 63 can be prevented from sliding in the groove 46, Further just stop the rotation of push button.

3 to 5, the top surface 54 of the slider 5 is also provided with a rear limit boss 57, the rear limit boss is provided with a through hole 58, the through hole 58 A peg 7 is slidably provided (its structure will be described in detail later); correspondingly, the left push button 61 and the right push button 62 are provided with an arc groove 64 for avoiding the rear limiting boss 57 , and a circular hole 65 for inserting the peg post 7 .

A front limit boss 59 is also provided on the top surface 54 of the slider 5. When one of the push buttons 61, 62 is opened and protrudes outside the lower jaw 1, the push button 61, 62 are matched with the front limiting boss 59.

As shown in Fig. 6, Fig. 7 and Fig. 12, the left push button 61 and the right push button 62 are provided with an operating portion 66, and the farthest end of the operating portion 66 is a wedge-shaped surface 67, as shown in Fig. 12 As shown, the two wedge-shaped surfaces 67 are arranged symmetrically and correspondingly. When one of the push buttons 62 is opened and stretches out of the lower jaw, the two wedge surfaces respectively arranged on the left push button 61 and the right push button 62 The wedge-shaped surface 67 fits.

As shown in Figure 9 and Figure 10, the schematic diagram of the tail of the linear seam cutter in the initial state of the present invention, the slide block 5 shown at this time is inserted into the lock block 4 and fixed, the first lock hook 45 and the second lock The hook 55 forms a complete circle 90 , and the two push buttons 61 , 62 are closed and tightly attached to the lower jaw 1 . The so-called "folded and close" means that the distance from the outermost edges of the push buttons 61, 62 to the lower jaw 1 is the shortest at this time. Since the protrusion 47 is not active, any one of the push buttons 61 , 62 can expand and protrude outside the lower jaw 1 . As shown in Figures 11 to 13, the so-called "open and extend" means that the surface of the operating part 66 of the right push button 62 is perpendicular to its running route, that is, the operating part 66 of the right push button 62 in the figure has been ready for firing Prepare. The push buttons 61 , 62 are shown to rotate about the centerline of the ring 90 when they are opened.

At this time, since the two wedge-shaped surfaces 67 are attached to each other, after the right push button 62 is opened and stretched out of the lower jaw 1, the left push button 61 is restricted from being opened and stretched out of the lower jaw. Clamp 1 outside. Similarly, when the left push button 61 is opened and stretched out of the lower jaw 1 , it will also restrict the right push button 62 from being opened and stretched out of the lower jaw 1 . This ensures that only one push button can be opened and protrudes beyond the lower jaw 1 .

When the present preferred embodiment reaches the state shown in Fig. 11 and Fig. 13, the doctor can push the right push button 62, and at this moment, due to the effect of the second locking hook 55 and the front limiting boss 59, the right push button 62 can drive The slide block 5 moves forward and breaks away from the lock block 4 to reach the state shown in Fig. 14 to Fig. 17 . At this time, the left push button 61 is fixed on the locking block 4 due to the action of the protrusion 47 . That is, when the slider 5 is separated from the lock block 4, there is only one push button that is opened and fixed on the slider 5, and the other push button is folded and fixed on the lock block 4 superior.

As shown in FIG. 13 and FIG. 18 , the bottom of the peg 7 is a wedge-shaped base 70 that cooperates with the lower jaw 1 and is driven by the lower jaw 1 . In the initial state shown in Figure 13, the peg 7 does not enter the circular hole 65 of the push button; The wedge-shaped base 70 makes the peg 7 extend into the circular hole 65 . After finishing the operation like this, when pulling back nail push rod 2 and push knife rod 3 by right push button 62, right push button 62 is limited by described second locking hook 55 and bolt post 7 and can not rotate. Of course, the lower jaw 1 is not necessarily what drives the bolt column 7 to move, and it can also be a gasket fixed on the lower jaw 1 .

The effect of the present invention is that: the two push buttons 61, 62 can be folded together and tightly attached to the jaws, which can relatively reduce the overall volume of the device, and the cost of packaging and transportation will also be relatively reduced; when one of the two push buttons When pushing the slider 5 to move, the other push button is fixed on the lock block 4, so as to avoid the situation that the non-working push button (the left push button 61 in the preferred embodiment) moves and gets caught in the doctor's medical gloves. The invention has a novel and simple structure and is suitable for popularization.

The words expressing position and direction described in the present invention refer to the operator of the instrument, the end close to the operator is the proximal end or the rear end, and the end far away from the operator is the distal end or front end.

There are still many implementations in the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. a Linear stapling cutter, comprising: the upper and lower clamp that can mutually close or open, and is oppositely arranged on nail anvil and the nail bin of upper and lower clamp far-end respectively; Be provided with the push broach bar that can be provided with cutting knife along the ejector pin bar of described Linear stapling cutter axis movement simultaneously and far-end in described nail bin, it is characterized in that: described Linear stapling cutter also comprises,

One lock dog, described lock dog is fixed on described lower clamp;

One slide block, one end of described ejector pin bar and push broach bar is all disposed in the side of described slide block, and described slide block is connected to separably on described lock dog and also can moves relative to described lock dog;

Be symmetrically set in two push buttons of lock dog both sides, be respectively left push button and right push button, described left push button and right push button are all pivotally located on described lock dog or slide block;

When described slide block and described lock dog link together, described left push button and right push button are in original state, and all draw in the both sides of lower clamp;

When described slide block is separated with described lock dog, has and only have a push button to open and be relatively fixed on described slide block, another push button described draws in and is relatively fixed on described lock dog.

2. Linear stapling cutter according to claim 1, is characterized in that: the side of described slide block is connected on described lock dog along its axis plug-in type.

3. Linear stapling cutter according to claim 2, it is characterized in that: described lock dog comprises one for the body fixing with clamp, the front end symmetry of described body is extended with two elasticity male arms, described elasticity male arms is drawn in opposite directions in the situation of not stressing, and the distance between two elasticity male arms after described gathering is less than the insertion section of described slide block.

4. Linear stapling cutter according to claim 3, it is characterized in that: the top of described lock dog is provided with an imperfect first circular lock hook, the top of described slide block is corresponding is provided with an imperfect second circular lock hook, when described slide block inserts along its axis and is connected on described lock dog, described first lock hook and the second lock hook form a complete annulus.

5. Linear stapling cutter according to claim 4, is characterized in that: the top contact place of described annulus and lock dog and slide block is provided with the groove of a week, the corresponding raised line being provided with a week on described left push button and right push button.

6. Linear stapling cutter according to claim 5, is characterized in that: the end face of described elasticity male arms is provided with the projection of sliding in a groove for limiting raised line.

7. Linear stapling cutter according to claim 6, it is characterized in that: described left push button and right push button are equipped with a lozenges, the symmetrical corresponding setting of described two lozenges, when one of them push button opens and stretches out in outside described lower clamp, be located at two lozenges laminatings on left push button and right push button respectively.

8. Linear stapling cutter according to claim 7, is characterized in that: positive stop lug boss after the end face of described slide block being also provided with, is provided with a through hole, is provided with a hitching post slidably in described through hole in described rear positive stop lug boss; Accordingly, described left push button and right push button are equipped with one for dodging the arc groove of described rear positive stop lug boss, and a circular hole for making described hitching post insert.

9. Linear stapling cutter according to claim 8, is characterized in that: for coordinate and the wedge base driven by described lower clamp with described lower clamp bottom described hitching post.

10. Linear stapling cutter according to claim 9, is characterized in that: the end face of described slide block is also provided with a front limit boss, and when one of them push button described opens and stretches out in outside described lower clamp, described push button and described front limit boss match.