Wound closure device and connection unit

Abstract

The present invention discloses a wound closure device and a connection unit, which belongs to the field of medical products and is used to solve the problem that the existing wound closure device needs to be manufactured according to the shape and size of the wound, has high cost, long cycle, and cannot be mass-produced. The connection unit described in the present invention is an independent connection unit structure, which can be mass-produced. When treating a wound of a specific shape and size, it is only necessary to select connection units of corresponding size specifications and quantity and then perform corresponding connection and assembly to form a wound closure device structure adapted to the wound. Therefore, the present invention does not rely on a specific wound shape and size, and can be mass-produced, which can effectively reduce production costs. In addition, by correspondingly connecting a plurality of connection units, a window with a stable structure can be formed to ensure that the window does not fail due to deformation when the puller pulls and closes the wound.

Description

Technical Field

[0001] The present invention relates to the field of medical products, and in particular to a wound closure device and a connecting unit. Background Art

[0002] A "wound closure device" (hereinafter referred to as Document 1) is disclosed in patent document with application number 201811101842.0. Through this wound closure device, a wound healing area can be enclosed corresponding to the location of the wound, constructing a complete or independent undisturbed treatment area, which is convenient for wound treatment and healing.

[0003] However, in the above-mentioned document 1, the corresponding window structure is formed after being enclosed by the structure of the isolation fence; since the window structure needs to be connected to the fixer through a puller, and when in use, the puller needs to apply tension between the window and the fixer, so as to achieve the application of tension to the wound and make the wound close. In this way, the shape of the window structure needs to be fixed to withstand a certain tension; for example, in document 1, its window part (specifically, the window body wall) needs to be a fixed structure, such as it is provided with a prefabricated molding. However, since the shape and size of the wound in actual situations are often not known in advance, if each wound needs to be specially prefabricated with a corresponding shape according to the shape and size of the wound before it can be made into the required wound closure, its actual use has great limitations, and the wound closure specially customized to a specific size according to the shape and size of the wound is costly, has a long cycle, and cannot be mass-produced. Summary of the invention

[0004] The technical problem solved by the present invention is that the existing wound closure device needs to be manufactured according to the shape and size of the wound, which has the problems of high cost, long cycle and inability to be mass-produced.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a connecting unit, including a cofferdam baffle, a puller and a fixer, one end of the puller is connected to the fixer, the other end of the puller is connected to the back side of the cofferdam baffle, the bottom surface of the fixer is provided as a fixed adhesive surface for sticking on the skin, the left and right ends of the cofferdam baffle are connecting ends, a first connecting part is provided at one of the connecting ends of the cofferdam baffle, and a second connecting part is provided at the other connecting end of the cofferdam baffle, the first connecting part and the second connecting part are corresponding matching structures that can adjust and lock the connection angle θ.

[0006] Furthermore, the first connecting part is a polygonal prism, and the second connecting part is a polygonal hole consistent with the polygonal prism; or, the first connecting part is a plurality of positioning posts, and the second connecting part is a plurality of positioning holes that can be misaligned with the positioning posts.

[0007] Furthermore, the corresponding matching structure between the first connection part and the second connection part is a hinged connection structure, and a locking mechanism is provided at the hinged connection structure.

[0008] Furthermore, the locking mechanism is a screw or a ratchet mechanism.

[0009] Furthermore: it also includes a limit connecting rod, and the corresponding matching structure between the first connecting part and the second connecting part is a hinged connection structure; at least one limit slot is arranged on the cofferdam baffle, and each limit slot is arranged at intervals along the connection direction of the cofferdam baffle; and a clamping head corresponding to the limit slot is arranged at the end of the limit connecting rod.

[0010] Furthermore, the limit slot and the clamping head are in an articulated matching structure, and the limit connecting rod is in an "I" shape, a "Y" shape or an "X" shape.

[0011] Furthermore, the limit slot and the clamping head are directional matching structures.

[0012] Furthermore, one end of the limit slot passes through the upper end of the cofferdam baffle.

[0013] Furthermore, the closing direction of the puller is perpendicular to the cofferdam baffle; there are multiple pullers, which are spaced apart along the connection direction of the cofferdam baffle; the puller is a ratchet structure or a lace structure; a base belt parallel to the cofferdam baffle is provided on the edge of the fixer facing the cofferdam baffle.

[0014] In addition, the present invention also provides a wound closure device, which is composed of the above-mentioned connecting units, and the connecting units are provided in plurality. The plurality of connecting units are connected in sequence through the connecting ends of the cofferdam baffle plate to form an annular closed window, and the puller and the fixer in each connecting unit are located on the periphery of the window.

[0015] Furthermore, a functional module is arranged in the internal space of the window, and the functional module is at least one of a matching reference support module, a wound exudate absorption module, a wound hemostasis module, a wound antibacterial module, a wound information collection module and a cell tissue regeneration module, wherein the bottom surface of the matching reference support module facing the wound is a rigid reference plane.

[0016] Furthermore, it also includes an outer sealing film and an inner sealing film. The outer sealing film corresponds to covering the outer periphery of the window, and an opening corresponding to the window is provided on the outer sealing film. The inner sealing film corresponds to covering the window, and the edge of the inner sealing film is sealingly and tightly covered on the edge corresponding to the opening of the outer sealing film. A negative pressure sealed chamber can be formed in the area covered by the outer sealing film and the inner sealing film.

[0017] Furthermore, a negative pressure pipeline is also included, and the negative pressure pipeline connects the negative pressure sealing chamber with the outside.

[0018] The beneficial effects of the present invention are as follows: the connection unit described in the present invention is an independent connection unit structure, which can be mass-produced in advance. When treating a wound of a specific shape and size, it is only necessary to select connection units of corresponding size specifications and quantity and then perform corresponding connection and assembly to form a wound closure structure adapted to the wound. Therefore, the connection unit in the present invention does not depend on the specific wound shape and size, and can be mass-produced, which can effectively reduce the production cost. In addition, the wound closure described in the present invention can form a window with a stable structure by correspondingly connecting a plurality of connection units, ensuring that the window does not fail due to deformation when the drawer draws and closes the wound. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a top view of the wound closure device of the present invention when in use;

[0020] Figure 2 A schematic diagram of a puller adopting a ratchet structure;

[0021] Figure 3 A schematic diagram of a puller adopting a lacing structure;

[0022] Figure 4 for Figure 1 A schematic diagram of a structure in which a plurality of connection units are connected in sequence;

[0023] Figure 5 A schematic diagram of the structure of the connection of the cofferdam baffle part in another connection unit;

[0024] Figure 6 for Figure 5 A top view of

[0025] Figure 7 for Figure 6 A schematic diagram of the structure when the middle limit connecting rods are staggeredly connected;

[0026] Figure 8 It is a limit connecting rod of "I" shaped structure;

[0027] Fig. 9 It is a limit connecting rod of "Y" shape structure;

[0028] Fig.10 It is a limit connecting rod of "X" shape structure;

[0029] Fig.11 A top view of a single connection unit according to the present invention;

[0030] Fig.12 , Fig.13 A schematic diagram of the connection unit using a polygonal prism and a polygonal hole structure for matching;

[0031] Fig.14 , Fig.15 A schematic diagram of a connecting unit that adopts a pivot connection and a ratchet wheel as a locking mechanism;

[0032] Fig.16 , Fig.17 A schematic diagram of a connecting unit that adopts a pivot connection and a screw as a locking mechanism;

[0033] Fig.18 , Fig.19 A schematic diagram showing a case where a ball joint is used for the connection unit and a screw is used as a locking mechanism;

[0034] Fig. 20 , Fig.21 A schematic diagram of a connection unit using a plurality of positioning columns and a plurality of positioning holes for matching;

[0035] Marked in the figure are: cofferdam baffle 1, puller 2, fixer 3, fixed adhesive surface 4, first connecting part 5, polygonal prism 51, rotating shaft 52, sphere 53, positioning column 54, second connecting part 6, polygonal hole 61, shaft hole 62, ball cavity 63, positioning hole 64, locking mechanism 7, screw 71, ratchet ratchet mechanism 72, ratchet 721, ratchet 722, limiting connecting rod 8, limiting slot 9, clamping head 10, base band 11, window 12, matching reference support module 13, rigid reference plane 14, outer sealing membrane 15, inner sealing membrane 16, negative pressure sealing chamber 17, negative pressure pipeline 18, skin 19, wound 20, opening 21, U-shaped piece 22. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] like Fig.11 As shown in , the connection unit described in the present invention includes a cofferdam baffle 1, a puller 2 and a fixer 3, one end of the puller 2 is connected to the fixer 3, and the other end of the puller 2 is connected to the back side of the cofferdam baffle 1, and the bottom surface of the fixer 3 is provided with a fixed adhesive surface 4 for sticking on the skin 19, and the left and right ends of the cofferdam baffle 1 are connection ends, and a first connection part 5 is provided at one of the connection ends of the cofferdam baffle 1, and a second connection part 6 is provided at the other connection end of the cofferdam baffle 1, and the first connection part 5 and the second connection part 6 are corresponding matching structures that can adjust and lock the connection angle θ.

[0038] The so-called first connection part 5 and the second connection part 6 are corresponding matching structures capable of adjusting and locking the connection angle θ; it means that when two connection units are connected, the first connection part 5 of one connection unit is correspondingly matched and connected with the second connection part 6 of the other connection unit, and the angle θ between the cofferdam baffles 1 in the two connection units can be adjusted during the connection process, and after adjusting to the required θ value, the positional relationship of the cofferdam baffles 1 of the two connection units can be locked, that is, the angle θ is locked. Through the above-mentioned functional setting, the two cofferdam baffles 1 can eventually form a relatively fixed connection relationship, and its purpose is to form a window 12 with a stable structure after multiple cofferdam baffles 1 are connected in sequence when connecting to form a wound closure device, so as to provide a bearing force for the pulling action of the puller 2 on the wound, and prevent the window 12 from deforming due to the pulling action of the puller, thereby causing the wound closure device to fail.

[0039] Specifically, the specific structures for realizing the function of "the first connection part 5 and the second connection part 6 are corresponding matching structures capable of adjusting and locking the connection angle θ" in the present invention can adopt at least the following types:

[0040] The first one, refer to the attached Fig.12 and attached Fig.13 As shown in FIG. 5 , the first connection part 5 is set to be a polygonal prism 51, and the second connection part 6 is set to be a polygonal hole 61 consistent with the polygonal prism. In this way, the above-mentioned required functions can be achieved through the cooperation between the polygonal prism 51 and the polygonal hole 61. In addition, in theory, the value of the adjustable angle θ between the polygonal prism 51 and the multi-shaped hole 61 is determined by the number of sides of the polygonal prism 51. For example, Fig.12 and attached Fig.13 When the polygonal prism 51 shown in the figure is a regular hexagonal prism, the angle that can be adjusted is a multiple of 60°; similarly, when the polygonal prism 51 is a regular 12-degree deformed prism, the angle that can be adjusted is a multiple of 30°.

[0041] The second type, refer to the attached Fig. 20 and attached Fig.21 As shown in , the two first connection parts 5 are provided with a plurality of positioning posts 54, and the second connection part 6 is provided with a plurality of positioning holes 64 that can be misaligned with the positioning posts 54. The so-called misaligned matching means that when the two cofferdam baffles 1 are relatively rotated by a certain angle, they can be connected and matched through no less than two positioning posts 54 and two positioning holes 64, and this structure can also achieve the above-mentioned required functions. As shown in the reference figure, the plurality of positioning posts 54 and the plurality of positioning holes 64 can be evenly spaced in the direction of the circumference, and a positioning post 54 and a positioning hole 64 can be provided in the middle of the circumference. In theory, the structure can adjust the value of the angle θ to an integer multiple of the angle between two adjacent positioning posts 54 on the circumference.

[0042] The third type, see attached Fig.14 To Attachment Fig.19 As shown in , the corresponding matching structure of the first connection part 5 and the second connection part 6 is set as a hinge connection structure, and a locking mechanism 7 is set at the hinge connection structure. According to the difference of the hinge connection and the difference of the locking mechanism 7, it can be further divided into at least three specific structures as follows:

[0043] A. As attached Fig.14 and attached Fig.15 As shown in the figure, the corresponding matching structure of the first connecting part 5 and the second connecting part 6 is a pivot connection structure, which is rotated and matched by the corresponding rotating shaft 52 and the shaft hole 62, and then locked by the ratchet ratchet mechanism 72, that is, after the two cofferdam baffles 1 are relatively rotated to the required angle θ, the locking is achieved by the matching of the corresponding ratchet 722 and the ratchet 721; without loss of generality, the ratchet 722 should be configured as a sliding installation structure that can be telescopically controlled, that is, when the ratchet 722 is retracted, the locking match between the ratchet 722 and the ratchet 721 can be released, and when the ratchet 722 is extended, it can be locked with the ratchet 721.

[0044] B. As attached Fig.16 To Attachment Fig.17 As shown in the figure, the corresponding matching structure of the first connecting part 5 and the second connecting part 6 is a pivot connection structure, which is rotated and matched by the corresponding rotating shaft 52 and the shaft hole 62, and then locked by the screw 71, that is, after the two cofferdam baffles 1 are rotated relative to each other to the required angle θ, they are locked by tightening the screw 71, and when the angle θ needs to be adjusted, it is only necessary to loosen the corresponding screw 71.

[0045] C. As attached Fig.18 To Attachment Fig.19 As shown in , the corresponding matching structure of the first connection part 5 and the second connection part 6 is a ball connection structure, which is rotated and matched by the corresponding ball 53 and the ball cavity 63, and then locked by the screw 71, that is, after the two cofferdam baffles 1 are relatively rotated to the required angle θ, they are locked by tightening the screw 71, and when the angle θ needs to be adjusted, it is only necessary to loosen the corresponding screw 71. After adopting this ball connection structure, the adjustment and locking of the angle θ can theoretically achieve the adjustment and control of the spatial angle within a certain range. Among them, the attached Figure 1 and attached Figure 4 The figure shows a wound closure device composed of the above-mentioned ball connection structure.

[0046] Fourth, refer to the attached Figure 5 To Attachment Fig.10As shown in , by further setting a limit connecting rod 8, the position locking of the cofferdam baffle 1 is realized by the limit connecting rod 8; correspondingly, the corresponding matching structure of the first connecting part 5 and the second connecting part 6 needs to be set as a hinged connection structure; at the same time, there are at least one limit card slot 9 on the cofferdam baffle 1, and each limit card slot 9 is arranged at intervals along the connection direction of the cofferdam baffle 1; a clamping head 10 corresponding to the limit card slot 9 is arranged at the end of the limit connecting rod 8. For example, with the attached Figures 5 to 7 In the structure shown in , three limit slots 9 are provided on each cofferdam baffle 1, and each cofferdam baffle 1 can be connected by providing corresponding limit connecting rods 8 to achieve relative locking of the position. Without loss of generality, when installing the limit connecting rods 8, the limit connecting rods 8 of corresponding shapes and sizes should be selected according to the needs, on the one hand to ensure the distance between the relative cofferdam baffles 1, and on the other hand to ensure the shape of the entire window 12 enclosed after the connection is stable. More specifically, refer to the attached Figure 7 As shown in , three or even four cofferdam baffles 1 can also be connected simultaneously through corresponding “Y”-shaped or “X”-shaped limiting connecting rods 8, so as to further improve the shape stabilization effect of the window body 12.

[0047] Without loss of generality, the above-mentioned limit slot 9 and the clamp head 10 can be an articulated matching structure or a directional matching structure. The so-called articulated matching structure means that the limit slot 9 and the clamp head 10 can be allowed to rotate accordingly after they are matched, for example, the limit slot 9 is set as a cylindrical slot, and the clamp head 10 is set as a cylindrical column. The so-called directional matching structure means that the limit slot 9 and the clamp head 10 are not allowed to rotate accordingly after they are matched, for example, the limit slot 9 is set as a "T-shaped" slot or a dovetail slot structure, and the corresponding clamp head 10 is set as a corresponding matching structure.

[0048] In addition, when the above-mentioned limit slot 9 and the clamp head 10 can be a hinged matching structure, the present invention can further set the limit connecting rod 8 to be "I"-shaped, "Y"-shaped or "X-shaped", and the limit connecting rod 8 can be equipped with the above three shapes at the same time for selection; Figure 8 To Attachment Fig.10As shown in . At this time, when it is necessary to connect and lock the two relative cofferdam baffles 1 through the limiting connecting rod 8, if only an "I"-shaped limiting connecting rod 8 is used, the two cofferdam baffles 1 can be rotated accordingly around the connection point with the clamp 10; and when only a "Y"-shaped limiting connecting rod 8 is used, only one of the cofferdam baffles 1 can be rotated accordingly around the connection point with the clamp 10, while the other cofferdam baffle 1 cannot rotate relatively; and when an "X"-shaped limiting connecting rod 8 is used, the position of the two cofferdam baffles 1 can be fixed and locked. Through such a setting, it is more convenient to adjust the position relationship and the shape after assembly when assembling the cofferdam baffles 1, so as to better match the actual shape of the wound 20. Without loss of generality, in specific use, different positions can be connected with corresponding shapes of "I", "Y" or "X" as needed, for example, the attached Figure 5 To Attachment Figure 7 The situation shown in the figure is that different shapes of limit connecting rods 8 such as "I" shape, "Y" shape and "X" shape are used at the same time.

[0049] More specifically, in order to facilitate the installation of the limiting connecting rod 8 , one end of the limiting slot 9 can be further extended from the upper end of the cofferdam baffle 1 in the present invention.

[0050] The puller 2 of the present invention is used to generate a pulling force between the cofferdam baffle 1 and the fixer 3 to pull the wound 20 together and align it, so as to facilitate the healing and subsequent treatment of the wound. The fixer 3 of the present invention is used to be pasted and fixed on the outer skin 19 of the wound 20 to achieve adhesion and fixation with the skin 19. Specifically, the fixing adhesive surface 4 is pasted on the outer skin 19 of the wound 20, for example, Figure 2 and attached Figure 3 as shown in .

[0051] More specifically, in order to facilitate the pulling force of the puller 2 on the cofferdam baffle 1, the pulling direction of the puller 2 is preferably set perpendicular to the cofferdam baffle 1. In addition, in order to ensure that the pulling force of the puller 2 on the cofferdam baffle 1 is relatively evenly distributed, multiple pullers 2 can be set in each connection unit, and the multiple pullers 2 are arranged at intervals along the connection direction of the cofferdam baffle 1, for example, Fig.11As shown in the figure, two pullers 2 are provided. In addition, the puller 2 in the present invention can also specifically adopt the ratchet structure or lace structure disclosed in document 1, and this patent will not introduce these two specific structures in detail; of course, without loss of generality, the puller 2 in the present invention can also adopt other structures that can achieve the pulling effect. In addition, a base band 11 parallel to the cofferdam baffle 1 can be further provided on the edge of the fixer 3 facing the cofferdam baffle 1; wherein the base band 11 should adopt a rigid linear skeleton, and the skin 19 on the edge side of the wound 20 can be evenly pulled parallel to the wound midline through the base band 11 to close, and the structure of the base band 11 is consistent with the structure disclosed in document 1, and this patent will not introduce it in detail.

[0052] The wound closure device of the present invention is composed of the connection units of the present invention, wherein a plurality of the connection units are required to be provided, and the connection ends of the cofferdam baffles 1 in the plurality of connection units are sequentially connected to enclose a circular closed window 12, and the puller 2 and the fixer 3 in each connection unit are located at the periphery of the window 12. Figure 1 and attached Figure 3 In the specific example shown in FIG, six connection units are sequentially connected through the cofferdam baffle 1 to enclose and form a corresponding window 12; Figures 5 to 7 As shown in FIG, a partial structure of one end of a wound closure device is formed by connecting through corresponding connecting units.

[0053] Without loss of generality, the connection unit in the present invention can be provided with a variety of sizes and specifications, so that it can be flexibly selected according to needs when used. The lengths of the cofferdam baffles 1 in the connection units of different sizes and specifications can be set to different values, for example, in the attached Figure 1 In the embodiment, the length of the cofferdam baffles 1 of the two connecting units located at the upper and lower positions is obviously longer than the length of the cofferdam baffles 1 at the left and right positions.

[0054] Since the connection and matching structure between two adjacent cofferdam baffles 1 in the present invention is a structure that can adjust and lock the connection angle θ, when assembling a wound closure device, the corresponding number and size specifications of connection units can be selected according to the shape and size of the actual wound 20, and by adjusting the connection angle θ between each cofferdam baffle 1, a wound closure device that is compatible with the actual wound 20 is finally formed, ensuring effective enclosure and isolation of the wound 20.

[0055] In addition, considering that when the window 12 is enclosed to form the window 12, in order to facilitate the closed connection of the two ends of the window 12 along the direction of the wound, a U-shaped piece 22 may be further provided, as shown in the attached Figure 5 To Attachment Figure 7As shown in , the U-shaped member 22 can be composed of a U-shaped cofferdam baffle, and the corresponding bending structure can be formed by the U-shaped member 22, so that the two connection units and the connection structure between the two connection units can be replaced by a single U-shaped member 22; and because the U-shaped member 22 itself can form a bending structure with a relatively fixed angle, it is equivalent to the situation that the connection angle θ between the cofferdam baffles 1 in the two connection units is a fixed value, which also avoids the need to connect and adjust the cofferdam baffles 1 of the two through the corresponding "first connection part 5 and the second connection part 6 to adjust and lock the connection angle θ" connection matching structure when two connection units are used for connection. Of course, without loss of generality, when the U-shaped member 22 is used, since the two ends of the U-shaped member 22 need to be connected to the cofferdam baffles 1 of the connection unit at the corresponding end, the U-shaped member 22 should also be provided with the corresponding first connection part 5 and the second connection part 6; in addition, the outer side of the U-shaped member 22 can be provided with or without the puller 2 and the fixer 3 according to the situation.

[0056] Without loss of generality, the cofferdam baffle 1 and U-shaped member 22 in the present invention need to bear the pulling action of the puller 2, so they should have a certain structural strength, and can be specifically a relatively hard structural member, such as a relatively hard injection molded part.

[0057] More specifically, the wound closure device described in the present invention may also be provided with corresponding functional modules in the internal space of the window 12. These functional modules are some supplies that are conventionally used when treating wounds, including but not limited to the following modules: a reference support module 13, a wound exudate absorption module, a wound hemostasis module, a wound antibacterial module, a wound information acquisition module, and a cell tissue regeneration module. The above-mentioned functional modules are also described in Document 1, and the present invention will not introduce them in detail. Among them, the reference support module 13 is placed inside the window 12, and its bottom surface facing the wound is set as a rigid reference plane 14, as shown in the attached figure. Figure 2 and attached Figure 3 As shown in , the rigid reference plane 14 can be better limited in the vertical direction, pressed against the wound from the front, and ensure that the wound skin edge is aligned and leveled in the vertical direction.

[0058] In addition, the present invention further provides an outer sealing film 15 and an inner sealing film 16. The outer sealing film 15 covers the outer periphery of the window 12, and an opening 21 corresponding to the window 12 is provided on the outer sealing film 15. The inner sealing film 16 covers the window 12, and the edge of the inner sealing film 16 seals and fits on the edge corresponding to the opening 21 of the outer sealing film 15. A negative pressure sealing chamber 17 can be formed in the area covered by the outer sealing film 15 and the inner sealing film 16. After the outer sealing film 15 and the inner sealing film 16 are provided, the outer peripheral edge of the outer sealing film 15 is sealed and attached to the skin 19 to form a corresponding negative pressure sealing chamber 17. In this way, the negative pressure sealing chamber 17 can be evacuated to generate pressure through the corresponding sealing film. On the one hand, negative pressure conditions can be formed in the range corresponding to the wound 20 to meet the treatment requirements of flushing and cleaning the modules or built-in dressings in the window 12. On the other hand, negative pressure can be used to make the built-in functional module or the built-in matching reference support module 13 and the rigid reference plane 14 under the closing film, so that the rigid reference plane 14 and the skin surface of the wound and the free skin edge of the wound are closely attached to each other at zero distance, so that the originally amorphous free skin edge of the wound can be closely attached to the rigid reference plane 14 in the vertical direction, and the free skin edge of the wound can be forced to align and level with the rigid reference plane 14 to ensure that the built-in functional module of the wound is effectively located above the wound to be treated.

[0059] More specifically, in order to facilitate the vacuuming of the negative pressure sealed chamber 17, a negative pressure pipeline 18 may be further provided, and the negative pressure pipeline 18 connects the negative pressure sealed chamber with the outside. In addition, if necessary, a one-way valve may be provided on the negative pressure pipeline 18, so as to facilitate the vacuuming or multiple replacement of the cleaning liquid in the cavity. Of course, if the negative pressure pipeline 18 is not provided, when the negative pressure sealed chamber 17 is vacuumed, it is necessary to extend the vacuumed tube body from the edge of the sealing film, and after the vacuuming is completed, the tube body is quickly removed and then the edge of the sealing film is sealed to avoid leakage.

Claims

1. A wound closure connection unit, characterized in that: The invention comprises a cofferdam baffle (1), a puller (2) and a fixer (3), wherein one end of the puller (2) is connected to the fixer (3), and the other end of the puller (2) is connected to the back side of the cofferdam baffle (1); the bottom surface of the fixer (3) is provided with a fixing and pasting surface (4) for pasting on the skin (19); the left and right ends of the cofferdam baffle (1) are connecting ends; a first connecting portion (5) is provided at one of the connecting ends of the cofferdam baffle (1), and a second connecting portion (6) is provided at the other connecting end of the cofferdam baffle (1); the first connecting portion (5) and the second connecting portion (6) are corresponding matching structures capable of adjusting and locking the connection angle θ.

2. The wound closure connection unit according to claim 1, characterized in that: The first connecting portion (5) is a polygonal prism (51), and the second connecting portion (6) is a polygonal hole (61) that is consistent with the polygonal prism; or, the first connecting portion (5) is a plurality of positioning columns (54), and the second connecting portion (6) is a plurality of positioning holes (64) that can be misaligned with the positioning columns (54).

3. The wound closure connection unit according to claim 1, characterized in that: The corresponding matching structure between the first connecting part (5) and the second connecting part (6) is a hinged connection structure, and a locking mechanism (7) is provided at the hinged connection structure.

4. The wound closure connection unit according to claim 1, characterized in that: It also includes a limit connecting rod (8), and the corresponding matching structure between the first connecting part (5) and the second connecting part (6) is a hinged connection structure; at least one limit slot (9) is provided on the cofferdam baffle (1), and each limit slot (9) is arranged at intervals along the connection direction of the cofferdam baffle (1); and a clamping head (10) corresponding to the limit slot (9) is provided at the end of the limit connecting rod (8).

5. The wound closure connection unit according to claim 4, characterized in that: The limiting clamping groove (9) and the clamping head (10) are hingedly matched structures, and the limiting connecting rod (8) is in an "I" shape, a "Y" shape or an "X" shape.

6. The wound closure connection unit according to claim 4, characterized in that: The limiting clamping groove (9) and the clamping head (10) are directional matching structures.

7. The wound closure connection unit according to claim 1, characterized in that: The pulling and closing direction of the puller (2) is perpendicular to the cofferdam baffle (1); a plurality of pullers (2) are provided, and the plurality of pullers (2) are arranged at intervals along the connection direction of the cofferdam baffle (1); the puller (2) is a ratchet structure or a lacing structure; a base band (11) parallel to the cofferdam baffle (1) is provided on the edge of the fixer (3) facing the cofferdam baffle (1).

8. A wound closure device, comprising the wound closure connection unit according to any one of claims 1 to 7, characterized in that: The wound closure device connection units are provided in plurality, and the plurality of wound closure device connection units are connected in sequence through the connection ends of the cofferdam baffle (1) to enclose and form an annular closed window (12), and the puller (2) and the fixer (3) in each wound closure device connection unit are located on the periphery of the window (12).

9. The wound closure device according to claim 8, characterized in that: A functional module is arranged in the internal space of the window (12), and the functional module is at least one of a matching reference support module (13), a wound exudate absorption module, a wound hemostasis module, a wound antibacterial module, a wound information collection module and a cell tissue regeneration module, wherein the bottom surface of the matching reference support module (13) facing the wound is a rigid reference plane (14).

10. The wound closure device according to claim 8, wherein: The invention also comprises an outer sealing film (15) and an inner sealing film (16), wherein the outer sealing film (15) covers the outer periphery of the window (12), an opening (21) corresponding to the window (12) is provided on the outer sealing film (15), and the inner sealing film (16) covers the window (12), and the edge of the inner sealing film (16) covers the edge corresponding to the opening (21) of the outer sealing film (15) in a sealing manner, so that a negative pressure sealed chamber (17) can be formed in the area covered by the outer sealing film (15) and the inner sealing film (16).

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