CN108784792A - Seal assembly and puncture outfit with it - Google Patents

Abstract

The invention discloses a sealing assembly for a puncture device, comprising a sealing film, which includes a sealing hole, and the sealing film seals an instrument inserted into the sealing hole; a sealing protector, arranged adjacent to the sealing film, Used to protect the sealing film from being damaged by the instrument, the sealing protector includes at least one pressing plate; the pressing plate includes a proximal opening and a distal hole, and a an opening extending to a protective wall of the distal hole; the protective wall includes at least two slits extending transversely from the distal hole, the slits allowing deformation of the protective wall to deform the distal end The hole expands to facilitate passage of the instrument through the distal hole. The sealing assembly of the trocar according to the present invention can effectively protect the sealing film and prevent the sealing film from being scratched or torn by the sharp edge of the instrument, and the protective wall of the sealing protection member has a simple structure and a small number , thus making assembly simple.

Description

Sealing assembly and trocar with same

technical field

The invention relates to a minimally invasive surgical instrument, in particular to a sealing assembly and a trocar with the same.

Background technique

A trocar is a surgical instrument used to establish an artificial channel into a body cavity in minimally invasive surgery (especially hard tube endoscopic surgery). Usually consists of a cannula assembly and a puncture needle. Its general clinical use method is: first cut a small opening on the patient's skin, then pass the puncture needle through the cannula assembly, and then penetrate the abdominal wall through the skin opening and enter the body cavity together. Once in the body cavity, the needle is removed, leaving the cannula assembly as a channel for the instrument to enter and exit the body cavity.

During endoscopic surgical procedures, an insufflation fluid, such as carbon dioxide or saline, is typically injected into a patient's body cavity, thereby providing sufficient operating space for the procedure to be performed. The insufflated body cavity is usually under a certain pressure, which can be called the pneumoperitoneum state. In order to maintain the pneumoperitoneum state to ensure the normal operation, the cannula assembly needs to be equipped with a sealing assembly, which usually prevents the insufflation fluid from leaking when the endoscopic instrument is placed in the cannula.

The sealing assembly includes a sealing membrane assembly, wherein the sealing membrane assembly includes a sealing membrane and a sealing membrane protector. The sealing film protector is used to protect the sealing film to prevent the sealing film from being damaged by surgical instruments, and includes a pressing plate. When the surgical instrument enters the cannula assembly, the front end of the surgical instrument enters the central hole of the sealing assembly and pushes and squeezes the veneer, so that the aperture of the central hole expands to allow the tubular assembly of the surgical instrument to enter. After the tubular assembly enters the cannula assembly, The compression plate circumferentially hoops the tubular component to cooperate with other sealing components to maintain the pneumoperitoneum state. In the prior art, the sealing film protector generally includes four pressing plates, each of which is a sector of 90° to 180°, and the four pressing plates are sequentially overlapped and overlapped, that is, the first pressing plate The first portion of the second compression plate is placed on the second portion of the second compression plate, the first portion of the second compression plate is placed on the second portion of the third compression plate, the first portion of the third compression plate is placed on the On the second portion of the fourth compression plate, the first portion of the fourth compression plate is placed on the second portion of the first compression plate so as to enclose a circular protective surface having a central hole. In such a design, the assembly process is more complicated.

The structure of the four pressing boards is relatively complicated, the number of pressing boards is large, and the production cost is high; while the assembly process of the pressing boards is relatively cumbersome, and the operator's proficiency is required to be high. In view of the above disadvantages, it is necessary to improve the sealing film protector from the perspective of simplifying the structure and assembly process.

Contents of the invention

The present invention aims to provide a sealing assembly for a trocar, which can realize the functions of sealing and sealing protection with a relatively simple structure and simplified assembly process.

Based on above-mentioned purpose, technical scheme of the present invention is as follows:

A sealing assembly for a trocar, comprising a sealing film, which includes a sealing hole, and the sealing film seals an instrument inserted into the sealing hole; a sealing protector, which is arranged adjacent to the sealing film, for protecting The sealing film prevents the sealing film from being damaged by the instrument, and the sealing protector includes at least one pressing plate; the pressing plate includes a proximal opening and a distal hole, and extends from the proximal opening to a protective wall of the distal hole; the protective wall includes at least two slits extending transversely from the distal hole, the slits allowing deformation of the protective wall to expand the distal hole, Thereby, it is convenient for the instrument to pass through the distal hole.

Further, the protection wall includes a first protection wall and a second protection wall that are connected, the first protection wall is in the shape of a cone, and the second protection wall is in the shape of an arc.

Further, the arc of the first protective wall is 360 degrees.

Preferably, the pressing plate includes at least two second protection walls, and a gap is formed between the at least two second protection walls.

Preferably, the at least two second protection walls are uniformly arranged on the first protection wall.

Preferably, the pressing plate includes two second protective walls, and the arc of each second protective wall is 90 degrees.

Further, the slit includes an open end located on the circumference of the distal hole and a terminal end far away from the distal hole, and the terminal end is a circular hole.

Preferably, the at least two slits are evenly distributed along the circumference of the distal hole.

Preferably, 2 to 20 slits are provided on the protective wall.

Preferably, the protective wall is provided with 6 slits, the extension lines of the slits intersect at the center of the distal hole, and every two adjacent slits form an included angle of 60° .

Preferably, the pressing plate is integrally injection molded from a thermoplastic elastomer.

Preferably, the sealing protector includes two pressing plates, the two pressing plates are overlapped, and the slit of one pressing plate is removed by the protective wall of the other pressing plate other parts covered.

Preferably, the pressing plate further includes a mounting edge extending laterally from the proximal opening, and the mounting edge is provided with a mounting hole for assembling the pressing plate.

The present invention also provides a trocar including the sealing assembly described in any one of the above, and the trocar further includes a puncture mandrel and a sleeve assembly, and the sealing assembly is disposed in the sleeve assembly.

According to the sealing assembly for the trocar and the trocar of the present invention, it includes a sealing film and a sealing protector, the sealing protector includes a proximal opening and a distal hole, and extends from the proximal opening to the distal hole. The protective wall of the end hole, the sealing protector can not only effectively protect the sealing film, prevent the sealing film from being scratched or torn by the sharp edge of the inserted surgical instrument; When passing through the frictional force of the sealing film, thereby reducing the undesired extension of the sealing film driven by the frictional force; and the protective wall of the sealing protection member has a simple structure and a small number, thus making the assembly process simple.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a trocar according to an embodiment of the present invention;

Fig. 2 is a three-dimensional schematic diagram of a sleeve assembly according to an embodiment of the present invention;

Fig. 3 is a three-dimensional partial sectional view of the bushing assembly in Fig. 2;

4 is an exploded view of a sealing membrane assembly according to an embodiment of the present invention;

Fig. 5 is a three-dimensional partial cross-sectional view of a sealing membrane assembly according to an embodiment of the present invention;

6 is a schematic structural diagram of a sealing film according to an embodiment of the present invention;

7 is an exploded view of a seal protector according to an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a sealing protector according to an embodiment of the present invention;

Fig. 9 is a schematic bottom view of a seal protector according to an embodiment of the present invention.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

For easier understanding, the side close to the clinician's operating hand is set as the proximal end, and the side away from the clinician's operating hand, that is, the side close to the patient's body is set as the distal end. With reference to Figure 1, the upper part of the figure represents the end close to the clinician's operating hand, which is the proximal end; while the lower part of the illustration is the end in contact with the patient's body, which is the distal end. Referring to FIG. 1 , it is the overall structure of a trocar 100 in a preferred embodiment of the present invention. A typical trocar 100 includes a puncture core assembly 1 and a cannula assembly 2 , in an initial state, the puncture core assembly 1 is inserted into the cannula assembly 2 .

FIG. 2 and FIG. 3 are a schematic diagram of the overall structure of the cannula assembly 2 after the puncture core assembly 1 is removed and a partial cross-sectional view thereof. The cannula assembly 2 has a proximal end 22 outside the patient's body and a distal end 24 inside the patient's body. In a typical application, the puncture core assembly 1 penetrates the sleeve assembly 2, and then drives the sleeve assembly 2 to penetrate the entire abdominal wall through the skin opening and enter the body cavity. After entering the body cavity, the puncture core assembly 1 is taken away, and the sleeve assembly 2 is left as a channel for the instrument to enter and exit the body cavity. A preferred bushing assembly 2 includes a first sealing assembly 3 and a second sealing assembly 4 . The locking groove of the first sealing component 3 and the hook of the second sealing component 4 are engaged and fastened. The cooperation of the hook and the slot is a quick-lock structure that can be quickly disassembled. This is mainly for the convenience of taking out tissues or foreign objects in the patient's body during surgery. There are many ways to implement the quick-lock connection between the first sealing component 3 and the second sealing component 4 . In addition to the structures shown in this embodiment, threaded connections, swivel buckles or other quick-lock structures can also be used. Optionally, the first sealing assembly 3 and the second sealing assembly 4 can be designed as non-quickly detachable structures.

FIG. 3 depicts the composition and assembly relationship of the first sealing assembly 3 . Lower housing 30 includes an elongated tube 31 defining a sleeve 32 extending through distal end 24 and connected to housing 33 . The lower housing 30 has an inner wall 34 supporting a duckbill seal 36 and an air valve installation hole 35 communicating with the inner wall 34 . The valve core 350 is installed in the valve body 352 and together in the installation hole 35 . The flange 362 of the duckbill seal 36 is sandwiched between the inner wall 34 and the lower cover 37 . There are many ways to fix the lower cover 37 and the lower casing 30 , such as interference fit, ultrasonic welding, adhesive bonding, and buckle fixing. In this embodiment, the four mounting posts of the lower cover 37 are in interference fit with the four mounting holes 35 of the lower housing 30 , and this interference fit makes the duckbill seal 36 in a compressed state. Referring to FIG. 2 and FIG. 3 , the sleeve 32 , the inner wall 34 , the duckbill seal 36 , the valve body 352 and the valve core 350 together form the first chamber. In this embodiment, the duckbill seal 36 is a single slit, but other types of closing valves, including tongue valves and multi-slit duckbill valves, can also be used. When an external instrument penetrates the duckbill seal 36, its duckbill 360 can open, but it generally does not provide a complete seal relative to the instrument. When the instrument is removed, the duckbill 360 closes automatically, thereby preventing the fluid in the first chamber from leaking out of the body.

FIG. 3 also depicts the composition and assembly relationship of the second sealing assembly 4 . The second sealing assembly 4 includes an upper cover 40 , a sealing membrane assembly 42 and an upper casing 41 . The sealing film assembly 42 is sandwiched between the upper cover 40 and the upper case 41 . There are many ways to fix the upper shell 41 and the upper cover 40 , such as interference fit, ultrasonic welding, adhesive bonding, buckle fixing and the like. This embodiment shows that the upper casing 41 and the upper cover 40 are fixed by ultrasonic welding. This fixation places the proximal end of the sealing membrane assembly 42 in compression.

Referring to FIG. 4 and FIG. 5 , the composition and assembly relationship of the sealing membrane assembly 42 are depicted. The sealing membrane assembly 42 includes a lower fixing ring 420 , a sealing membrane 5 , a middle fixing ring 424 , a protector 6 and an upper fixing ring 429 . The sealing film 5 and the protector 6 are sandwiched between the lower fixing ring 420 and the upper fixing ring 429 . Specifically, the lower fixing ring 420 is provided with a plurality of posts and holes, correspondingly, the surface of the middle fixing ring 424 opposite to the lower fixing ring 420 is also provided with the same number of holes and posts, and the sealing film 5 is provided with double the number of holes and posts. During assembly, the post of the lower fixing ring 420 passes through the hole on the sealing film 5, and is finally fixed in the corresponding hole on the middle fixing ring 424. Similarly, the middle fixing ring 424 is fixed on the lower fixing ring 420 in the same way. corresponding holes. In addition, corresponding holes are also provided on the surface of the middle fixing ring 424 facing the protector 6, so that the pillars on the upper fixing ring 429 can pass through the corresponding holes on the sealing ring 428 and the protector 6, and finally be fixed on the middle fixing ring 424. , so that the sealing ring 428 and the protector 6 are locked on the middle fixing ring 424 . The aforementioned cooperating columns and holes all adopt interference fit.

The protector 6 comprises two sequentially overlapping protective sheets, which are used to protect the sealing membrane 5 from being scratched or torn by sharp edges of inserted surgical instruments. The sealing ring 428 is an elastic membrane, comprising one or more radially (transversely) distributed annular folds, the folds have lateral compliance, so that the entire sealing membrane assembly 42 can float in the second sealing assembly 4 . In this embodiment, the sealing film 5 and the sealing ring 428 are two separate parts. In other embodiments, in order to reduce production costs, the sealing film 5 and the sealing ring 428 can also be designed as a whole. At this time, the sealing film Assembly 42 comprises lower retaining ring 420 , sealing membrane 5 , seal protector 6 and upper retaining ring 429 . The upper fixing ring 429 is provided with a plurality of pillars and holes, correspondingly, the opposite surface of the lower fixing ring 420 is also provided with the same number of holes and pillars, and the seal protector 6 is located above the integrated sealing film 5 and sealing ring 428 , the mounting edge 611 of the first pressing plate 61 and the mounting edge 621 of the second pressing plate 62 are installed on the corresponding columns, and the sealing film 5 and the sealing protector 6 are clamped between the lower fixing ring 420 and the upper fixing ring 429 space, so that the seal protector 6 forms protection for the sealing membrane 5 and prevents it from being punctured by the instrument. The aforementioned cooperating columns and holes all adopt interference fit.

The sealing membrane assembly 42 can be made of many materials with different properties to meet the desired elasticity or strength requirements, respectively. For example, sealing film 5 and sealing ring 428 are made of relatively soft elastomer materials, such as superelastic materials such as silica gel and isoprene rubber; protector 6 adopts semi-rigid thermoplastic elastomer, which is also called artificial rubber or synthetic rubber. Rubber not only has the excellent properties of high elasticity, aging resistance and oil resistance of traditional cross-linked vulcanized rubber, but also has the characteristics of convenient processing and wide processing methods of ordinary plastics. Preferably, the sealing protector 6 is made of TPU (thermoplastic polyurethane elastomer rubber), which has a wide hardness range, good resilience, and high tear resistance. When it is subjected to an external force, it can deform, and when the external force disappears , to restore the original shape, so that the device can always be closely attached to protect the sealing film 5, thereby ensuring the sealing effect. The upper fixing ring 429, the middle fixing ring 424 and the lower fixing ring 420 are made of relatively hard plastic materials such as polycarbonate.

As shown in FIG. 4 and FIG. 6 , FIG. 6 is a schematic perspective view of the inner side of the sealing film 5 . The sealing membrane 5 is an elastic membrane as a whole, and the sealing membrane 5 includes a proximal opening 50 , a distal hole 52 and a sealing wall 54 extending from the distal hole 52 to the proximal opening 50 . The distal hole 52 is formed by a sealing lip for receiving an inserted instrument and forming an airtight seal. The sealing lip may be non-circular, as described in the Background of the Invention, the sealing lip circumference should be short and thick enough to ensure a reliable seal when using a 5mm instrument. In this example, the sealing lip is circular. The sealing membrane 5 also includes a radial flange 55 , the sealing wall 54 is connected to the sealing lip at one end and to the radial flange 55 at the other end. Wherein, the sealing wall 54 includes an annular wall portion 544 connected with the radial flange 55 and a tapered wall portion connecting the sealing lip and the annular wall portion 544 . As mentioned above, the radial flange 55 is provided with a plurality of small holes to facilitate the installation of the sealing membrane assembly 42 . The sealing lip has an important function, that is: due to its certain rigidity, when part of its periphery is subjected to external force, the sealing lip can deform as a whole, and keep the shape and size of the deformed periphery roughly uniform, so that it can always be tight Fit the instrument to ensure the sealing effect.

As shown in FIG. 6 , the tapered wall portion of the sealing film 5 is in an inverted tapered shape as a whole, and the direction in which the generatrix of the cone of the tapered wall extends from the distal hole 52 to the radial flange 55 is defined as “transverse”. In this embodiment, the sealing wall 54 includes a plurality of folded regions 51 that circumscribe the distal hole 52 and extend laterally from the distal hole 52. The folded regions 51 include at least one folded unit, and each of the folded The unit extends from the distal aperture 52 towards the edge of the tapered wall portion. Each corrugated unit includes a corrugated peak and a corrugated valley, and the vertical distance from the corrugated peak to the corrugated valley is equal on the entire length of each of the corrugated units extending laterally from the distal hole 52 to the edge of the tapered wall portion. The minimum distances along the pleat walls to the pleat valleys are all equal, that is, the pleat shapes of each of the pleat units remain consistent, and the overall height of the pleat walls is also consistent, so that the pleats are arranged on the sealing wall 54, but do not increase the sealing The taper of the wall 54 can reduce the probability of inversion of the sealing membrane 5 when the instrument is withdrawn. Each of the pleated units extends laterally from the sealing lip to the edge of the tapered wall portion of the sealing wall 54, the sealing film 5 is an elastic film as a whole, and the pleats 51 can increase the elasticity and stretchability of the sealing lip. effect. Preferably, the pleat shapes of the pleat units in all the pleat regions are the same, and the heights of the pleat walls are also the same. The sealing wall 54 also includes flat areas 53, each flat area 53 extends in the transverse direction and is spaced between two adjacent wrinkled areas 51, and each wrinkled area 51 is spaced between two adjacent flat areas 53 between. In this way, the wrinkled area 51 is set at the distal hole 52, which increases the circumferential circumference of the distal hole 52, reduces the actual contact area between the instrument and the sealing membrane 5; allows the sealing lip forming the distal hole 52 to smoothly Expands or contracts to accommodate surgical instruments of different diameters while still maintaining a seal with the surgical instrument; and, due to the presence of multiple pleated elements, allows lateral and vertical movement of the surgical instrument without loss of seal; and reduces application Hoop strain (stress) for large diameter instruments, thereby reducing the clamping force and frictional resistance to the instrument. A flat area 53 is also provided on the sealing wall 54, and the flat area 53 increases the tensile stiffness in the axial direction, which can greatly reduce frictional resistance and improve stick-slip, and reduce the probability of inversion of the sealing film.

Further, the sealing wall 54 includes N groups of wrinkled areas 51 formed by the wrinkled units, and the value of N ranges from 2 to 20; a flat area 53 is also provided on the sealing wall 54, and the wrinkled areas 51 and the The flat areas 53 are arranged at intervals; each of the wrinkled areas includes 1 to 20 continuous wrinkled units. It can not only increase the circumferential circumference of the distal hole 52, but also facilitate demoulding during manufacturing, which is convenient for processing and manufacturing and saves materials.

Each of the wrinkled regions 51 is arranged symmetrically, and the straight line where the axis of symmetry thereof lies intersects the central axis of the distal hole 52 . The areas of each of the flat areas 53 are equal, and the areas of the flat areas 53 are larger than the areas of the wrinkled areas 51 , which facilitates demoulding during manufacturing and facilitates manufacturing. Preferably, each of said crimped elements extends transversely from said distal aperture 52 to the edge of the tapered wall portion of said sealing wall 54, and each of said crimped elements extends laterally from said distal aperture and In contact with the annular sealing wall 544 . The sealing membrane 5 is generally in an inverted cone shape, so as to facilitate the entry and exit of surgical instruments into and out of the distal hole 52 . The sealing film 5 is formed by integral injection molding of a flexible material. Preferably, the sealing film 5 is formed by integral injection molding of a flexible material, and its material is polyisoprene.

The sealing protector 6 includes a first protective wall and a second protective wall connected, the first protective wall is in the shape of a cone, and the second protective wall is in the shape of an arc. The direction in which the tapered generatrix extends from the distal hole 63 to the second protective wall, or the direction perpendicular to the second protective wall is defined as "transverse". As shown in FIG. 4 , the sealing protector 6 is arranged adjacent to the sealing film 5 for protecting the central sealing body of the sealing film 5 from perforation or tearing caused by sharp edges of inserted surgical instruments. In an embodiment of the present invention, referring to FIGS. 7 to 9 , the sealing protector 6 includes at least one pressing plate. Preferably, the seal protector 6 includes two pressing plates: a first pressing plate 61 and a second pressing plate 62, and the first pressing plate 61 and the second pressing plate 62 have the same shape, size and structure. same. Taking the first pressing plate 61 as an example, the first pressing plate 61 includes a first protective wall 616, an installation edge 611, and a second protective wall 615 connecting the first protective wall 616 and the installation edge 611. The first protective wall 616 It is tapered, and the second protective wall 615 is arc-shaped. The circumference of the first protective wall 616 is symmetrically provided with two second protective walls 615, and the other end of each second protective wall 615 is connected to a mounting edge 611, and the arcs of the second protective wall 615 and the mounting edge 611 are equal, so The arcs mentioned above are not more than 90 degrees. A gap 612 is formed between the two second protective walls 615, so that when the first pressing plate 61 and the second pressing plate 62 are overlapped, the second pressing plate 62 is rotated 90 degrees clockwise or counterclockwise, as shown in the figure 8, the two second protective walls 615 of the first pressing plate 61 are respectively located in the two gaps 622 of the second pressing plate 62, and the two cylindrical protective walls 625 of the second pressing plate 62 are respectively located in the second In the two gaps 612 of a pressing plate 61, the second protective wall 615 and the installation edge 611 of the first pressing plate 61 are not overlapped with the cylindrical protective wall 625 and the installation edge 621 of the second pressing plate 62, and the common Form the conical protective wall and the mounting edge. Optionally, the radians of the second protective wall 615 and the mounting edge 611 are equal to 90 degrees; in this way, when the first pressing plate 61 and the second pressing plate 62 are overlapped, the second protection of the first pressing plate 61 The wall 615 and the mounting edge 611 and the cylindrical protective wall 625 and the mounting edge 621 of the second pressing plate 62 can overlap and abut against each other to form a 360-degree conical protective wall and a 360-degree mounting edge to fully protect the sealing The annular wall portion 544 of the wall 54 and the radial flange 55 . Those skilled in the art should realize that the radians of the second protective wall 615 and the mounting edge 611 are only shown for illustrative purposes, in fact, the radians can be any value not greater than 90 degrees, such as 30 degrees, 45 degrees, 60 degrees etc., can realize the protection of the annular wall portion 544 of the sealing wall 54 and the radial flange 55.

As shown in FIG. 7 , the first protective wall 616 is equally divided into N protective pieces 613 by N slits 614, where 2≤N≤20, and the slits 614 include an open end relatively close to the distal hole 63 and a terminal far away from the The terminal end of the distal hole is configured as a round hole 617 to prevent the slit 614 from extending beyond the terminal end undesirably, causing the first protective wall 616 to be torn. A protective sheet 613 is formed between every two adjacent slits 614 . The arc of the first protection wall 616 is 360 degrees, that is, the N slits 614 and the N protection sheets 613 together form a 360-degree first protection wall 616 . Preferably, the protective wall is provided with six slits 614 , the extension lines of the slits intersect at the center of the distal hole, and an angle of 60° is formed between two adjacent slits. In another embodiment of the present invention, the first protective wall 616 is provided with four slits 614, the extension lines of the slits 614 intersect at the center of the distal hole, and two adjacent slits 614 form a 90 ° Angle. The above two preferred embodiments have given the preferred implementations that can achieve ideal results and are relatively easy to process and shape. Of course, through theoretical analysis and experimental tests, the value of N is within the range of 2 to 20 (including 2 and 20 two endpoint values), all can make the sealing protector 6 effectively protect the sealing film 5, and prevent the surgical instrument from scratching or tearing the sealing film 5 when it enters the patient's body through the puncture device. The assembly process is simple, the structure is simple, and the quantity is small.

The sealing protector 6 includes two identical pressing plates, and the second pressing plate 62 is rotated clockwise or counterclockwise by 90 degrees relative to the first pressing plate 61 and then overlapped to form the sealing protector 6 together; The overlapping arrangement includes: the two cylindrical protective walls of one pressing plate are located in the gap of the other pressing plate, and the slit of one pressing plate is covered by the protective sheet of the other pressing plate . As shown in Figure 8 or Figure 9, the slit 614 of the first pressing plate 61 is covered by the protective sheet 623 of the second pressing plate 62, and the slit 624 of the second pressing plate 62 is covered by the protective sheet 623 of the first pressing plate 61. The protective sheet 613 covers, thus, the first pressing plate 61 and the second pressing plate 62 jointly form the sealing protector 6, and the tapered surface of the first protective wall is a seamless tapered surface except for the distal hole 63, forming Protection of the sealing membrane 5 .

The sealing protector 6 includes a proximal opening and a distal hole 63 , and a protective wall extending from the proximal opening to the distal hole 63 . Taking the first pressing plate 61 as an example, the protective wall 616 includes at least two slits 614 extending laterally from the distal hole 63. The arrangement of the slits 614 can allow the protective wall 616 to deform to expand the distal hole 63, thereby It is convenient for surgical instruments to pass through the distal hole 63 . During this process, the N protective sheets 613 along the circumference of the distal hole 63 are still in close contact with the outer periphery of the instrument, and the auxiliary sealing film plays a role in maintaining the pneumoperitoneum state. The slit 614 includes an open end relatively close to the distal hole 63 and a terminal end far away from the distal hole, the terminal end being a circular hole 617, and the circular hole 617 can prevent surgical instruments from being inserted or withdrawn from the puncture device , the slit 614 extends beyond the terminal end. The sealing membrane assembly 42 includes a sealing membrane 5 and a sealing protector 6. The sealing protector 6 is arranged close to the sealing membrane 5 and is located at the proximal end of the sealing membrane 5. When the surgical instrument is inserted into the trocar, the surgical instrument first contacts the sealing protector 6, Enter the distal hole 52 of the sealing film 5 from the distal hole 63 of the sealing protector 6. Because the sealing protector 6 is made of TPU material, it has good resilience, that is, the characteristics of good recovery after the external force is removed. 63 The circumferential protective sheet 611 is still close to the outer periphery of the instrument, and the auxiliary sealing film plays a role in maintaining the pneumoperitoneum state. The sealing membrane assembly 42 includes a sealing membrane 5 and a sealing protection member 6. When no surgical instrument is inserted into the puncture device, the first protective wall of the sealing protection member 6 is in an inverted conical shape; the sealing protection member 6 is arranged close to the sealing membrane 5 and located at The proximal end of the membrane 5 is sealed. When the surgical instrument is inserted into the puncture device, the sharp edge of the surgical instrument first contacts the sealing protector 6, and enters the distal hole 52 of the sealing film 5 from the distal hole 63 of the sealing protector 6, and the protective sheet is subjected to external force. The protective sheet is separated, and the conical protective wall of the sealing protector 6 can effectively prevent the sealing film 5 from being scratched or torn by the sharp edge of the surgical instrument. When the surgical instrument is withdrawn from the puncture device, the external force gradually disappears. Because the sealing protector 6 is made of TPU material, it has good resilience, that is, it has good recovery after the external force is removed. The slit of one of the pressing plates is closed. Covered by another protective sheet of the pressing plate, the first protective wall gradually recovers into an inverted conical shape to protect the sealing membrane 5; the conical protective wall of the sealing protector 6 can effectively prevent the sealing membrane 5 from being sharpened by the surgical instrument. Scratched or torn edges.

The specific embodiment of the present invention provides an improved sealing protector 6, sealing membrane 5, sealing membrane assembly 42 including the sealing protecting member 6, sealing assembly 4 including the sealing membrane assembly 42, and applying the sealing membrane assembly 42. As for the trocar 100 of the sealing assembly 4, it can be understood that the sealing protection member 6 having the aforementioned characteristics, the sealing assembly 4 using the sealing protection member 6 and the trocar 100 using the sealing assembly 4 are all the subject matter of the present invention. Any changes, modifications, substitutions and variations made based on the above embodiments fall within the protection scope of the application for the present invention. According to the sealing assembly for a trocar and the trocar of the present invention, the seal protector 6 includes a proximal opening and a distal hole, and a protective wall extending from the proximal opening to the distal hole, and the seal protector 6. It can not only effectively protect the sealing film 5, but also prevent the sealing film 5 from being scratched or torn by the sharp edge of the inserted surgical instrument; it can also reduce the friction force passing through the sealing film 5 when the surgical instrument is inserted and withdrawn, thereby reducing 7. The sealing film 5 is driven by friction to extend undesirably; and the protective wall of the sealing protection member 6 has a simple structure and a small number, thus making the assembly process simple.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (14)

1. A sealing assembly for a trocar, comprising a sealing membrane comprising a sealing aperture, the sealing membrane sealing an instrument inserted into the sealing aperture; a seal protector, which is disposed adjacent to the seal film, for protecting the seal film from being damaged by the device, the seal protector comprising at least one pressing plate; It is characterized in that: the pressing plate includes a proximal opening and a distal hole, and a protective wall extending from the proximal opening to the distal hole; the protective wall includes at least two A transversely extending slit permits deformation of the protective wall to expand the distal aperture to facilitate passage of the instrument therethrough. 2. The sealing assembly according to claim 1, wherein the protective wall comprises a first protective wall connected to a second protective wall, the first protective wall is tapered, and the second protective wall Arc-shaped. 3. The sealing assembly according to claim 2, wherein the arc of the first protective wall is 360 degrees. 4. The sealing assembly according to claim 2, wherein the pressing plate comprises at least two second protection walls, and a gap is formed between the at least two second protection walls. 5. The sealing assembly according to claim 4, wherein the at least two second protection walls are uniformly arranged on the first protection wall. 6 . The sealing assembly according to claim 5 , wherein the pressing plate comprises two second protective walls, and the arc of each second protective wall is 90 degrees. 7. The sealing assembly according to claim 1, wherein the slit comprises an open end located on the circumference of the distal hole and a terminal end away from the distal hole, the terminal end being a round hole . 8. The sealing assembly of claim 1, wherein said at least two slits are evenly distributed along the circumference of said distal hole. 9. The sealing assembly according to claim 1, wherein 2 to 20 slits are provided on the protective wall. 10. The sealing assembly according to claim 9, wherein six slits are arranged on the protective wall, and the extension lines of the slits intersect at the center of the distal hole, and every two Two adjacent slits form an included angle of 60°. 11. The sealing assembly according to claim 1, wherein the pressing plate is integrally injection molded from a thermoplastic elastomer. 12. The seal assembly according to claim 1, wherein the seal protector comprises two pressing plates, the two pressing plates are overlapped, and the narrow portion of one of the pressing plates The slit is covered by the protective wall of another pressing plate except for the slit. 13. The sealing assembly according to claim 12, wherein the pressing plate further comprises a mounting edge, the mounting edge extends laterally from the proximal opening, and the mounting edge is provided for assembling the Mounting holes for the press-fit plate. 14. A puncture device including the sealing assembly according to any one of claims 1 to 13, characterized in that: the puncture device also includes a puncture mandrel and a sleeve assembly, and the sleeve assembly is provided with the Seal components.