WO2021047368A1 - Flexible head swinging device for anastomat - Google Patents

Abstract

Provided is a flexible head swinging device for an anastomat, comprising a flexible mechanism (3) and a head swinging pull rod (4); the flexible mechanism (3) comprises a flexible rope (31), a steering protrusion (32), two fixed connection points (33) and a plurality of compensation acting parts (34), in the working state, when the head swinging pull rod (4) moves along the length direction of a pipe body part (1), the flexible rope (31) is pulled to move around the steering protrusion (32), to drive a jaw part (2) to swing, and when the jaw part (2) and the pipe body part (1) are in a straight line, the flexible rope (31) is in a tensioned state, and when the jaw part (2) swings and bends, the compensation acting parts (34) abut against the flexible rope (31), and still keep the flexible rope (31) in the tensioned state. The head swinging of the jaw part (2) can swing in a big angle, even up to ±120°, and the swinging process is smooth without jam fault.

Description

Flexible head swinging device for anastomat Technical field

The invention relates to a medical device, in particular to a flexible head swing device used for an anastomat.

Background technique

The stapler is a medical device that replaces manual suture. The main working principle is to use titanium nails to anastomose tissues, similar to a stapler. According to the different scope of application, it can be divided into skin stapler, digestive tract (esophagus, gastrointestinal, etc.) circular stapler, rectal stapler, round hemorrhoid stapler, circumcision stapler, vascular stapler, hernia stapler , Lung cutting and suture device, etc.

The stapler for endoscopic linear cutting includes a tube body part and a jaw part arranged at the front end of the tube body part. The jaw part includes a push knife and a staple cartridge assembly. A swing is provided between the jaw part and the tube body part. Head device to drive the swing of the jaw part.

The existing head swing device can be referred to Chinese Patent CN107970052A, which includes a swing head center wheel, a pull rod, an elastic member, a retaining member, and a plurality of slot matching with the retaining member. One end of the pull rod is directly movably connected with the jaw part of the stapler (that is, the working head) (such as a rotary connection), and the other end is eccentrically connected to the center wheel of the swing head. During the operation, the medical staff rotates the swing head center wheel to make the pull rod move along the axial direction of the stapler, thereby driving the jaw part of the stapler (that is, the working head) to swing. The above-mentioned head swing mechanism can realize the swing of the jaw part (that is, the working head), but because the tie rod and the jaw part (that is, the working head) are connected by a rigid mechanism, the maximum swing head angle during work is basically limited to about 45°, and the swing The closer the head time is to the limit angle of 45°, the greater the head swinging force and the more jammed the mechanism will be and the greater the firing force.

How to increase the head swing angle range of the stapler is the research direction of the present invention.

Summary of the invention

The purpose of the present invention is to provide a flexible head swing device for an anastomat to increase the angle range of the swing head.

In order to achieve the above object, the technical solution adopted by the present invention is: a flexible head swing device for an anastomat, the anastomat includes a tube body part and a jaw part arranged at the front end of the tube body part, the jaw part The tail end of the part is hinged with the front end of the tube body part by a pivot, so that the jaw part can rotate relative to the tube body part;

The flexible head swing device includes a flexible mechanism and a swing head pull rod; the flexible mechanism includes a flexible rope, a steering protrusion, two fixed connection points, and a plurality of compensating parts, and the steering protrusion is arranged on the pipe body part , The two fixed action points are symmetrically arranged on the jaw part with the axial center line of the jaw part as the axis of symmetry; the middle part of the flexible rope bypasses the steering protrusion, and its two ends are positioned at two fixed points. The connection point is surrounded in a ring shape; and, a place on the flexible rope is positioned and connected with the swing head pull rod; the compensating part is arranged on the jaw part corresponding to the flexible rope;

In the working state, when the swing head pull rod moves along the length of the pipe body, the flexible rope is pulled to move around the steering protrusion to drive the jaw part to swing; when the jaw part is in a straight line with the pipe body part, the The flexible rope is in a tensioned state, and when the jaw part swings and bends, the compensating part acts on the flexible rope to resist and still keep the flexible rope in a tensioned state.

Among the above schemes, there are the following changes and further preferred schemes:

1. In the above solution, the line connecting the two fixed points of action passes through the pivot.

2. In the above solution, the line connecting the two fixed action points is located on the front side of the pivot on the jaw part.

3. In the above solution, there are at least two compensating action parts, which are located inside the loop surrounded by the flexible rope; when the jaw part swings and bends to one side, a compensating action part conflicts with The flexible rope keeps the flexible rope in a tensioned state, and when the jaw part swings and bends to the other side, another compensating part resists and acts on the flexible rope to keep the flexible rope in a tensioned state.

4. In the above solution, the flexible rope is required to be a rope body made of a material with high tensile strength and small elasticity, such as a stainless steel rope.

5. In the above solution, the turning protrusion is provided with a circular arc transition angle in the circumferential direction, and more preferably, the turning protrusion is a roller.

6. In the above solution, the plane of the loop formed by the flexible rope intersects the pivot perpendicularly.

The design principles and effects of the present invention are as follows: The present invention adopts a flexible mechanism, the flexible mechanism is mainly a flexible rope, the flexible rope is wound into a ring between the jaw part and the pipe body part, and the two ends of the flexible rope are fixed at fixed points of action. On the jaw part, and the middle part of the flexible rope bypasses the steering protrusion on the pipe body part, the upper part of the flexible rope is fixedly connected with the swing head pull rod. When the swing head pull rod moves along the pipe body part, the length of the flexible rope is fixed. If it cannot be stretched, the flexible rope is pulled to move around the steering boss, which drives the movement of the fixed point of action, thereby driving the jaw part to swing around the pivot. The above structure makes the jaw part and the swing head pull rod flexible. In connection, there is no interference between the jaw part and the swing head pull rod, and the swing head angle of the jaw part is greatly increased, even up to ±120°, and the swing process is smooth and not jammed.

In addition, during the swinging process of the jaw part, because the compensating action part is provided to interfere with the flexible rope to keep the flexible rope always in tension, the stability of the swing head angle of the jaw part is improved, and the jaw part is touched by external force. Touch, the head swing angle will not change.

Description of the drawings

FIG. 1 is a three-dimensional schematic diagram of the structure of an embodiment of the present invention;

Figure 2 is a schematic front view of Figure 1;

Figure 3 is a schematic diagram of the connection piece and cover added to the basis of Figure 1;

4 is a schematic diagram of the principle of the structure of an embodiment of the present invention;

5 is a schematic diagram of the state when the head swing angle of the structure of the embodiment of the present invention is 60°;

6 is a schematic diagram of the state when the head swing angle of the structure of the embodiment of the present invention is 90°;

FIG. 7 is a schematic diagram of the state when the head swing angle of the structure of the embodiment of the present invention is 120°.

In the above drawings: 1. Pipe body part; 2. Jaw part; 21. Jaw part body; 22. Adapter; 3. Flexible mechanism; 31. Flexible rope; 32. Steering protrusion; 33. Fixed connection point 34. Compensation part; 4. Swing head pull rod; 5. Pivot; 6. Connecting piece; 7. Cover.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Example: See Figure 1 to Figure 6 as shown:

A flexible head swinging device for an anastomat. The anastomat includes a tube body part 1 and a jaw part 2 arranged at the front end of the tube body part 1. The tail end of the jaw part 2 and the tube body part 1 The front end is hinged with a pivot 5, so that the jaw part 2 can rotate relative to the pipe body part 1.

As shown in FIG. 1 to FIG. 6, the flexible head swing device includes a flexible mechanism 3 and a swing head pull rod 4. The flexible mechanism 3 includes a flexible rope 31, a steering boss 32, two fixed connection points 33, and a plurality of compensating action parts 34. The two fixed action points 33 take the axial centerline a of the jaw part 2 as the symmetry axis, It is symmetrically arranged on the jaw part 2; the turning protrusion 32 is arranged on the pipe body part 1; the middle part of the flexible rope 31 bypasses the turning protrusion 32, and its two ends are positioned on two fixed connection points 33 , Surrounded in a ring shape, and the compensation part 34 is arranged on the jaw part 2 corresponding to the flexible cord 31. In addition, a place on the flexible rope 31 is positioned and connected to the swing head pull rod 4.

As shown in Figure 1, the jaw part 2 is composed of a jaw part body 21 and an adapter 22. The two fixed connection points 33 and a plurality of compensating parts 34 are all provided on the adapter 22, and the jaw part 21 includes The staple cartridge, the nail anvil, and the push knife etc. are included.

1 to 6, in the working state, when the swinging rod 4 moves along the length of the pipe body portion 1, the flexible rope 31 is pulled to move around the steering protrusion 32 to drive the jaw portion 2 to swing. When the jaw part 2 is in a straight line with the pipe body part 1, the flexible cord 31 is in a tensioned state, and when the jaw part 2 swings and bends, the compensating part 34 resists and acts on the flexible cord 31, and still makes The flexible cord 31 maintains a tensioned state.

Preferably, the connecting line of the two fixed action points 33 passes through the pivot axis of the jaw part 2. Alternatively, the line connecting the two fixed action points 33 is located on the front side of the pivot 5 on the jaw part 2, as shown in the figure. In this way, it is ensured that the head swing angle of the jaw part 2 is maximized.

There are at least two compensating parts 34, and the two compensating parts 34A and 34B are located inside the loop formed by the flexible cord 31. When the jaw part 2 swings and bends to one side, a compensating part 34A acts against the flexible cord 31 to keep the flexible cord 31 in a tensioned state, and when the jaw part 2 swings and bends to the other side, the other The compensating part 34B acts against the flexible cord 31 to keep the flexible cord 31 in a tensioned state.

In the specific figure, there are two compensation parts besides 34A and 34B: 34C and 34D. The two compensating action portions 34C and 34D are located outside the loop formed by the flexible cord 31 and act on the flexible cord 31 from the outside.

The flexible rope 31 is preferably a metal rope, such as a stainless steel rope. In fact, it may be made of other materials, and preferably a rope body made of a material with good tensile strength and small elasticity.

The plane of the loop formed by the flexible rope 31 intersects the pivot 5 perpendicularly, which is preferable.

1 and 3, the specific fixing form of the flexible rope 31 and the fixed connection point 33 is: a column is provided at the fixed connection point 33, and the end of the flexible rope 31 is designed to be a loop shape, flexible The end of the rope 31 is sleeved on the column at the fixed connection point 33, and then a cover 7 is placed on the column at the two fixed connection points 33 to block the flexible rope 31 and prevent the end of the flexible rope 31 from being fixed. The column of the connection point 33 falls off.

1 and 3, the specific form of the articulation between the jaw part 2 and the tube body part 1 is: a connecting piece 6 is provided on both sides of the tube body part 1 to extend toward the jaw part 2 respectively. The rear end of the connecting piece 6 is fastened to the pipe body portion 1, and the front end of the connecting piece 6 is sleeved on the end of the pivot shaft 5 to form a hinged connection. Specifically, a casing (not shown in the figure) is sleeved on the outside of the tube body portion 1 to block and restrict the connecting piece 6.

This embodiment adopts a flexible mechanism, the flexible mechanism is mainly a flexible rope 31, the flexible rope 31 is wound into a ring between the jaw part 2 and the pipe body part 1, and the two ends of the flexible rope 31 are fixed by two fixed points of action 33 On the jaw part 2, and the middle part of the flexible cord 31 bypasses the turning protrusion 32 on the tube body part 1. The flexible cord 31 is fixedly connected to the swing head pull rod 4 when the swing head pull rod 4 runs along the pipe body part 1. When moving, since the length of the flexible rope 31 must not be stretched, the flexible rope 31 is pulled to move around the steering protrusion 32, which drives the movement of the fixed point of action 33, thereby driving the jaw part 2 to complete around the pivot shaft 5. Swing, the above structure makes the jaw part 2 and the swing head pull rod 4 a flexible connection, there is no interference between the jaw part 2 and the swing head pull rod 4, and the swing head angle of the jaw part 2 is greatly increased, even reaching ±120° , And the swing process is smooth and not jammed.

In addition, during the swinging process of the jaw part 1, the compensating action parts 34A, 34B, 34C, and 34D act on the flexible cord 31 in turn. When the jaw part 1 deflects downward by 60° (as shown in Figure 5), The compensating part 34A abuts against the upper part of the inner side of the flexible cord 31, and when the jaw part 1 is further deflected to 90° (as shown in FIG. 6), in addition to the compensating part 34A colliding against the upper part of the inner side of the flexible cord 31, The compensating part 34D abuts against the lower part of the outer side of the flexible cord 31, and even the jaw part 1 can be deflected to 120° (as shown in FIG. 7). When the jaw part 1 is deflected upwards by -60°, the compensating part 34B abuts against the lower part of the inner side of the flexible cord 31, and when the jaw part 1 is deflected to -90° and -120°, except for the compensating part 34B In addition to the lower part of the inner side of the flexible cord 31, there is a compensating part 34C that is in contact with the upper part of the outer side of the flexible cord 31, thereby maintaining the always-tensioned state of the flexible cord 31, and improving the stability of the head swing angle of the jaw part 2. When the jaw part 2 is touched by an external force, the head swing angle will not change.

The number and specific setting positions of the compensation parts 34A, 34B, 34C, and 34D described above are examples. In practice, they can be set according to the situation, as long as the tension state of the flexible cord 31 can be maintained when the jaws are partially deflected.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those familiar with the technology to understand the content of the present invention and implement them accordingly, and should not limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (6)

A flexible head swinging device for an anastomat. The anastomat comprises a tube body part (1) and a jaw part (2) arranged at the front end of the tube body part (1). The jaw part (2) The tail end of the tube body part (1) is hinged to the front end of the tube body part (1) by a pivot (5), so that the jaw part (2) can rotate relative to the tube body part (1); it is characterized by: The flexible head swing device includes a flexible mechanism (3) and a swing head pull rod (4); the flexible mechanism (3) includes a flexible rope (31), a steering boss (32), and two fixed connection points (33) And a plurality of compensating action parts (34), the steering protrusions (32) are arranged on the pipe body part (1), and the two fixed action points (33) are aligned with the axial center line of the jaw part (2) (a) is the axis of symmetry, symmetrically arranged on the jaw part (2); the middle of the flexible rope (31) bypasses the steering boss (32), and its two ends are located at two fixed connection points (33) The upper part is surrounded in a ring shape; and, a place on the flexible rope (31) is positioned and connected with the swing head pull rod (4); the compensating part (34) is arranged on the jaw corresponding to the flexible rope (31) Part (2) on; In the working state, when the swing head pull rod (4) moves along the length direction of the pipe body part (1), the flexible rope (31) is pulled to move around the steering boss (32) to drive the jaw part (2) to swing; When the jaw part (2) and the pipe body part (1) are in a straight line, the flexible rope (31) is in a tensioned state, and when the jaw part (2) is oscillated and bent, the compensation part ( 34) The resistance acts on the flexible rope (31) and still keeps the flexible rope (31) in a tensioned state. The flexible head swinging device for anastomat according to claim 1, characterized in that the line connecting the two fixed action points (33) passes through the pivot (5). The flexible head swing device for the stapler according to claim 1, characterized in that: the connecting line of the two fixed action points (33) is located in front of the pivot (5) on the jaw part (2) side. The flexible head swing device for the stapler according to claim 1, characterized in that there are at least two compensating action parts (34), and the two compensating action parts (34) are located in a flexible rope (31) surrounded by When the jaw part (2) swings and bends to one side, a compensating part (34) resists and acts on the flexible rope (31) to keep the flexible rope (31) in tension, and when the jaws When the part (2) swings and bends to the other side, the other compensating part (34) resists and acts on the flexible rope (31) to keep the flexible rope (31) in a tensioned state. The flexible head swinging device for anastomat according to claim 1, characterized in that: the turning protrusion (32) is provided with a circular arc transition angle in the circumferential direction. The flexible head swinging device for the stapler according to claim 1, characterized in that the plane where the loop formed by the flexible rope (31) is wound perpendicularly intersects the pivot (5).

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