CN116098669B

CN116098669B - Wound closer

Info

Publication number: CN116098669B
Application number: CN202310280233.0A
Authority: CN
Inventors: 慈文斌
Original assignee: Beijing Medicare Trading Co ltd
Current assignee: Beijing Medicare Trading Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2024-02-20
Anticipated expiration: 2043-03-22
Also published as: CN116098669A

Abstract

The invention relates to a wound closer, which relates to the field of medical appliances, and comprises two bases, wherein one ends of the two bases are mutually inserted, the bottom surface of each base is provided with an adhesive layer, the bottom surface of one end of each base is also fixed with a microneedle patch, and the bottom surface of the microneedle patch is provided with a plurality of microneedles. The beneficial effects of the invention are as follows: the two bases draw the two sides of the wound toward each other, promoting healing. The micro-needle patch with the micro-needles is arranged on the bottom surface of the base, when the base is attached to the skin, the micro-needles can penetrate the skin, so that the stability of the connection between the base and the skin is improved, the base is prevented from falling off before wound healing, and the reliability of the wound closer is improved.

Description

Wound closer

Technical Field

The invention relates to the field of medical instruments, in particular to a wound closer.

Background

Existing wound closures typically include two bases with the bottom surface of the base attached to the sides of the wound with adhesive tape, and the two bases are then tensioned with a strap-like structure. For example, patent CN 201147343Y-skin wound stapler, describes: the lock consists of two substrates, wherein each substrate comprises a glue paste, a reinforcing rib and a lock catch, the lock catch is L-shaped and consists of a lock bar and a lock seat, the lock bar is provided with lock teeth and a gap area, the lock seat is fixedly connected to the reinforcing rib, and a lock bolt is arranged in the lock seat; the stitching instrument is formed by connecting two substrates through the mutual penetration of the respective locking strips into the opposite locking seats, and the structures of the two substrates are identical.

However, in existing constructions, the base is typically adhered to the skin only by adhesive or stickers. In the actual use process, two bases are needed to draw two sides of a wound close to each other, the two bases are affected by tension of the wound, interaction force exists between skin and adhesive tape, and the bases are separated from the skin. If the wound closure falls off, reinstallation is required, which is detrimental to wound recovery.

Disclosure of Invention

The technical problem to be solved by the invention is how to increase the firmness of the connection of the wound closure device with the skin.

The technical scheme for solving the technical problems is as follows: the wound closer comprises two bases, one ends of the two bases are mutually inserted, an adhesive layer is arranged on the bottom surface of each base, a microneedle patch is further fixed on the bottom surface of one end of each base, and a plurality of microneedles are arranged on the bottom surface of each microneedle patch.

The beneficial effects of the invention are as follows: the two bases draw the two sides of the wound toward each other, promoting healing. The micro-needle patch with the micro-needles is arranged on the bottom surface of the base, when the base is attached to the skin, the micro-needles can penetrate the skin, so that the stability of the connection between the base and the skin is improved, the base is prevented from falling off before wound healing, and the reliability of the wound closer is improved.

On the basis of the technical scheme, the invention can be improved as follows.

Further, each base comprises a substrate, a base block and locking strips, two ends of the base block are respectively and fixedly connected with the substrate and the locking strips, the base block is provided with locking parts, the locking strips of two bases are oppositely arranged, and one locking strip of one base is inserted into the locking part of the other base and is unidirectionally positioned.

The beneficial effects of adopting the further scheme are as follows: the two bases are locked and positioned in a unidirectional mode through the locking strip and the locking part, the two bases can only move in opposite directions and cannot be away from each other, tension of a wound can be resisted, two sides of the wound are pulled close to each other, and healing is promoted. The bottom surface of the substrate is provided with an adhesive layer and a microneedle patch for firm connection with skin.

Further, the portable device further comprises handles, wherein the handles are detachably connected with the two base blocks respectively.

The beneficial effects of adopting the further scheme are as follows: the two base blocks are operated by the handle to move in opposite directions, so that the operation is convenient, and the acting force applied to the base blocks is more uniform.

Further, the handles are respectively connected with the two base blocks in a sliding mode along the direction perpendicular to the inserting direction of the two bases.

The beneficial effects of adopting the further scheme are as follows: after the two base blocks are operated by the handle to move in place, the handle moves along the direction perpendicular to the plugging direction of the two bases and is detached from the base blocks, and the detachment process does not affect the closing of wounds.

Further, the handle comprises a first handle body and a second handle body, and the lower end of the first handle body and the lower end of the second handle body are respectively detachably connected with the two base blocks; the middle part of the first handle body is hinged with the middle part of the second handle body, or the upper end of the first handle body is fixedly connected or hinged with the upper end of the second handle body.

The beneficial effects of adopting the further scheme are as follows: the handle can enable the two bases to move in opposite directions only by kneading the first handle body and the second handle body, and can be operated by one hand, so that the medical care personnel can use the handle conveniently.

Further, the end faces of the two opposite ends of the base blocks are inclined planes extending from top to bottom to the other ends of the base blocks.

The beneficial effects of adopting the further scheme are as follows: the two base blocks are arranged in place after being mutually abutted on the upper parts of one end of the two base blocks, the upper end faces of the base blocks play a limiting role, and after being arranged in place, an avoidance space is reserved between the lower parts of the two base blocks, so that a space is reserved for a wound, and the wound has good air permeability and is convenient for medicine feeding. During application, the medicine can be dripped between the two base blocks, and the medicine can be guided to the wound along the inclined plane.

Further, the bottoms of the opposite ends of the two base blocks are provided with notches.

The beneficial effects of adopting the further scheme are as follows: on one hand, the gap leaves an avoidance space for the wound, so that the wound has better air permeability and is beneficial to wound recovery; on the other hand, the liquid medicine can be collected and guided along the length direction of the wound, so that the liquid medicine can be conveniently and fully applied to the wound.

Further, the bottom surface of the base block is provided with a groove.

The beneficial effects of adopting the further scheme are as follows: the grooves are arranged on the bottom surface of the base block, so that the skin at the bottom surface of the base block can be ventilated, and wound healing is facilitated.

Further, the microneedles on the two microneedle patches are inclined toward each other.

The beneficial effects of adopting the further scheme are as follows: the microneedles of the two microneedle patches are inclined in opposite directions, and when the two bases are close to each other, the corresponding microneedles can also gradually grasp the skin, so that the firmness of connection with the skin is improved, and healing is facilitated. For wounds of similar circumstances, the present approach is effective in shortening the healing period.

Further, the density of the microneedles on the microneedle patch near one end of the respective base is less than the density near the other end of the respective base.

The beneficial effects of adopting the further scheme are as follows: compared with the even distribution of the micro-needles, when the micro-needle patch of the scheme is applied to the base, the skin traction on two sides of the wound is more stable, the base is not easy to separate from the skin, and the reliability is higher.

Drawings

FIG. 1 is a three-dimensional view of a wound closure of the present invention;

FIG. 2 is a front view of the wound closure of the present invention;

FIG. 3 is an enlarged view of the wound closure of FIG. 2 at M;

FIG. 4 is a three-dimensional view of two bases after they are spliced;

FIG. 5 is a top view of the base;

FIG. 6 is a front view of the base;

FIG. 7 is a three-dimensional view of the first shank;

FIG. 8 is a three-dimensional view of the second handle body;

FIG. 9 is a schematic view of a microneedle patch mounting location;

FIG. 10 is a block diagram of a base having a mating protrusion and a mating recess;

FIG. 11 is a front view of a microneedle patch;

FIG. 12 is a three-dimensional block diagram of a microneedle;

FIG. 13 is a schematic top view of a microneedle patch on two bases;

fig. 14 is an enlarged view of a portion of the microneedle patch on the right side of fig. 9.

In the drawings, the list of components represented by the various numbers is as follows:

1. a base; 101. a substrate; 102. a base block; 103. a locking bar; 104. a locking part; 105. an inclined plane; 106. a notch; 107. a groove; 108. a base block convex strip; 109. a ratchet; 110. inserting the bulge; 111. a plug-in groove;

2. an adhesive layer;

3. a microneedle patch; 301. a microneedle; 302. a rib; 303. a concave region;

4. a handle; 401. a first handle body; 402. and a second handle body.

Detailed Description

The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1-14, the present embodiment provides a wound closer, which includes two bases 1, one ends of the two bases 1 are inserted into each other, the bottom surface of each base 1 has an adhesive layer 2, the bottom surface of one end of each base 1 is further fixed with a microneedle patch 3, and the bottom surface of the microneedle patch 3 has a plurality of microneedles 301.

As shown in fig. 1 and 2, the left and right bases 1 of the wound closer are inserted into and close to each other, thereby pulling the two sides of the wound toward each other and promoting healing. The microneedle patch 3 with the microneedles 301 is arranged on the bottom surface of the base 1, when the base 1 is attached to the skin, the microneedles 301 can penetrate the skin, so that the connection stability of the base 1 and the skin is improved, the base 1 is prevented from falling off before wound healing, and the reliability of a wound closer is improved.

When in use, the two bases 1 are inserted into a proper distance, then are stuck to the skin, and the two bases 1 are kneaded to enable the two wounds to be close to each other, and the edges of the wounds are turned outwards to be closed.

Alternatively, the microneedle patch 3 may be directly attached to the bottom surface of the adhesive layer 2, or directly fixed to the bottom surface of the base 1, and the microneedle patch 3 is disposed side by side with the adhesive layer 2.

It should be noted that the microneedle patch 3 is generally used in the prior art for painless administration, for example, for drug injection for diabetics. The microneedles 301 of the microneedle patch 3 are slightly convex, and can only penetrate into the epidermis layer of the skin, so that pain is not caused to the patient, or the microneedles 301 are mostly positioned in the epidermis layer, and a small part of the microneedles penetrate into the dermis layer, so that the irritation to the dermis layer is reduced. The microneedle 301 of the microneedle patch 3 of the present embodiment may not be coated or contain a drug, or may be coated with a drug that is beneficial to wound healing on the surface of the microneedle 301, or a part of the microneedle 301 is made of a drug that is beneficial to wound healing, after the microneedle 301 penetrates the skin, the drug dissolves and acts on the wound to promote wound healing, and the rest of the microneedle 301 still acts to anchor the skin.

Alternatively, the adhesive layer 2 is a medical adhesive tape or other adhesive material.

On the basis of any one of the above schemes, each base 1 comprises a substrate 101, a base block 102 and locking bars 103, two ends of the base block 102 are respectively and fixedly connected with the substrate 101 and the locking bars 103, the base block 102 is provided with locking parts 104, the locking bars 103 of two bases 1 are oppositely arranged, and one locking bar 103 of one base 1 is inserted into the locking part 104 of the other base 1 and is unidirectionally positioned.

The two bases 1 are locked and positioned in a unidirectional way through the locking strip 103 and the locking part 104, the two bases 1 can only move in opposite directions and cannot be away from each other, the tension of a wound can be resisted, the two sides of the wound are pulled close to each other, and healing is promoted. The adhesive layer 2 and the microneedle patch 3 are provided on the bottom surface of the base sheet 101 for firm connection with the skin, and optionally, the adhesive layer 2 may be provided on the bottom of the base block 102.

As shown in fig. 6, the locking bar 103 has a plurality of unidirectional locking protrusions spaced along its length, and the locking portion 104 is a locking hole or a locking buckle, and the unidirectional locking protrusions can be inserted into the locking portion 104 of the other base 1 (in the direction of the arrow shown in fig. 9) in the forward direction, but cannot be withdrawn in the reverse direction. Alternatively, the one-way locking protrusion may be a ratchet 109 as in fig. 6; or the unidirectional locking bulges can also be hemispherical bulges, one side of the locking strips 103 of the two bases 1, which are opposite, is a spherical surface, and the opposite side of the two locking strips 103 is a vertical surface; or the unidirectional locking protrusion can also be other structures which can realize the unidirectional locking function.

Alternatively, the substrate 101 may be provided with a plurality of ventilation holes.

On the basis of any one of the above aspects, the wound closer further comprises a handle 4, wherein the handle 4 is detachably connected with the two base blocks 102 respectively.

The two base blocks 102 are operated to move towards each other through the handle 4, so that the operation is convenient, and the acting force applied to the base blocks 102 is more uniform. After the two bases 1 are moved into place, the handles 4 can be removed so as not to affect the daily activities of the patient.

Alternatively, the width of the handle 4 along the direction perpendicular to the insertion direction of the two bases 1 (i.e., the dimension in the front-rear direction) is equal to or close to the width of the base block 102, so that the force of the handle 4 can be uniformly applied to the base block 102, and the base block 102 can uniformly apply force to the wound edge; alternatively, the width of the handle 4 may be greater or less than the width of the base block 102.

Alternatively, the handle 4 and the base block 102 may be detachably clamped or slidably inserted.

On the basis of any one of the above schemes, the handle 4 is respectively slidably connected with the two base blocks 102 along the direction perpendicular to the connection direction of the two bases 1.

After the handle 4 operates the two base blocks 102 to move into place, the handle 4 moves along the direction perpendicular to the plugging direction of the two bases 1 and is detached from the base blocks 102, and the detachment process does not affect the closing of wounds.

Specifically, as shown in fig. 1 and 2, the handle 4 may be inserted into the base block 102 or separated from the base block 102 in the front-rear direction.

Specifically, the opposite ends of the two base blocks 102 are provided with base block convex strips 108 extending along the width direction (the front-rear direction shown in fig. 1), the lower end of the handle 4 is provided with corresponding slots, and the slots at the lower end of the handle 4 are spliced with the base block convex strips 108. The plug-in structure is simple and convenient to manufacture.

On the basis of any one of the above schemes, the handle 4 includes a first handle body 401 and a second handle body 402, and the lower end of the first handle body 401 and the lower end of the second handle body 402 are detachably connected with the two base blocks 102 respectively; the middle part of the first handle body 401 is hinged to the middle part of the second handle body 402 (as shown in fig. 1 and 2), or the upper end of the first handle body 401 is fixedly connected or hinged to the upper end of the second handle body 402.

The handle 4 can enable the two bases 1 to move in opposite directions only by kneading the first handle body 401 and the second handle body 402, and can be operated by one hand, thereby being convenient for medical staff to use.

As shown in fig. 1 and 2, the middle part of the first handle body 401 is hinged to the middle part of the second handle body 402, the arm of force of the handle body is fixed, and the moving distance of the base 1 is fixed after the base 1 is attached to the skin, so that the generated moment is fixed. After the base 1 is operated by the handle 4 with the structure, the tension of each closing position of the wound edge is consistent, which is more beneficial to the selective eversion closing of the wound edge.

On the basis of any one of the above embodiments, as shown in fig. 3, the opposite end surfaces of the two base blocks 102 are inclined surfaces 105 extending from top to bottom toward the other ends thereof.

The two base blocks 102 are arranged in place after being mutually abutted on the upper parts of one end of the two base blocks 102, the upper end faces of the base blocks 102 play a limiting role, after being arranged in place, an avoidance space is reserved between the lower parts of the two base blocks 102, a space is reserved for a wound, and the wound has good air permeability and is convenient for medicine feeding. During administration, the drug may be dropped between the two base blocks 102, and the drug may be directed along the inclined surface 105 to the wound.

Wherein, the included angle a between the inclined plane 105 and the bottom surface of the base block 102 is 30-50 degrees, and in one specific embodiment, the included angle a is 45 degrees. Included angle a allows for effective flow guiding of the drug to the lower portion of base block 102 and to the wound site.

In either case, the base blocks 102 have notches 106 at the bottoms of opposite ends.

On one hand, the notch 106 reserves an avoidance space for the wound, so that the wound has better air permeability and is beneficial to wound recovery; on the other hand, the liquid medicine can be collected and guided along the length direction of the wound, so that the liquid medicine can be conveniently and fully applied to the wound.

Further, the inclined surface 105 extends to the junction between the lower end of the notch 106 and the base block 102. As shown in fig. 3, that is, the junction between the lower end of the notch 106 and the base block 102 is also an inclined plane, so that the convergence of the notch 106 to the liquid medicine is increased, and the liquid medicine flowing away from the wound along the base block 102 is reduced.

On the basis of any one of the above, the bottom surface of the base block 102 has a groove 107.

The grooves 107 are arranged on the bottom surface of the base block 102, so that the skin at the bottom surface of the base block 102 can be ventilated, and wound healing is facilitated.

In one example, the channel 107 of the base block 102 communicates with the gap 106, which may siphon the liquid drug to uniformly apply the liquid drug to the skin surrounding the wound.

On the basis of any one of the above schemes, the micro-needles 301 are in an inverted conical shape, or the lower ends of the micro-needles 301 on the two micro-needle patches 3 are inclined towards each other.

As shown in fig. 11, a structure of the microneedle patch 3 on the right base 1 of fig. 2 is shown. The microneedles 301 of the two microneedle patches 3 are inclined towards each other, and when the two bases 1 are close to each other, the corresponding microneedles 301 can also gradually grasp the skin, so that the firmness of connection with the skin is improved, and healing is facilitated. For wounds of similar circumstances, the present approach is effective in shortening the healing period.

Alternatively, the microneedles 301 are inclined inverted conical or pyramidal shapes.

In one specific embodiment, as shown in fig. 12, the microneedle 301 is in the shape of an inclined inverted cone, and the microneedle 301 has a microneedle plane at one end of the two bases 1 opposite to each other. Thus, when the two bases 1 move in opposite directions, the microneedle plane can assist to push the skin at the edge of the wound, so that the skin is close to each other, the area of the base 1 applying closing force to the skin is increased, the closing effect is improved, meanwhile, the pressure of acting force can be reduced, and the uncomfortable feeling of a patient is relieved. Moreover, the micro needle 301 is conical at one end of the two bases opposite to each other, when the base 1 moves within a certain range, the skin can be completely attached to the conical surface by means of self elasticity, and the micro needle 301 has a good anchoring effect.

On the basis of any one of the above, as shown in fig. 14, the density of the microneedles 301 on the microneedle patch 3 near one end of the corresponding base 1 is smaller than that near the other end of the corresponding base 1.

Compared with the even distribution of the microneedles 301, when the microneedle patch 3 of the scheme is applied to the base 1, the skin traction on two sides of a wound is more stable, the base 1 is not easy to separate from the skin, and the reliability is higher.

Further, the microneedle patch 3 has a rib 302 on the lower side of the opposite ends of the two bases 1, the rib 302 extending in the width direction of the microneedle patch 3, and the width of the microneedle patch 3 is greater than or equal to the width of the substrate 101.

Thus, the rib 302 can block the liquid medicine, prevent the liquid medicine from flowing from the base block 102 to the substrate 101, prevent the liquid medicine from affecting the viscosity of the adhesive layer 2, and meanwhile, the rib 302 can promote the effect of pushing and attaching the wound edge, so that the reliability is high.

In particular, the matching of the distribution density of the convex edges 302 and the micro needles 301 ensures the firmness of the connection between the micro needle patch 3 and the skin, also ensures the effectiveness of tightening and closing the skin at two sides of the wound, and can reduce or even avoid pain of patients.

Those skilled in the art generally recognize that the pain sensation is relatively increased when the density of the microneedles 301 is low. However, in this embodiment, the low-density microneedles 301 are disposed near the rib 302, and the rib 302 of the two bases 1 acts simultaneously to generate thrust to the skin at both sides of the wound mainly through the rib 302, so that the skin is uniformly stressed. The microneedles 301 adjacent to the ridge 302 assist in tightening the skin and, due to the presence of the ridge 302, the penetration depth of the portion of the microneedles 301 is relatively reduced, even if the portion of the microneedles 301 does not penetrate the dermis layer, thereby reducing pain. The microneedles 301 on the microneedle patch 3 far from the ribs 302 are arranged at a higher density, so that the capability of the distal end (relative to the distal end of the base block 102) of the microneedle patch 3 to grasp the skin is increased, and the overall firmness of the microneedle patch 3 is ensured.

Further, as shown in fig. 9 and 13, for the microneedle patches 3 on the two bases 1, opposite ends of the two microneedle patches 3 have concave regions 303 arranged at intervals along a direction perpendicular to the insertion direction (front-rear direction) of the two bases 1, the concave regions 303 are recessed toward the base block 102 of the corresponding base 1, and the concave regions 303 of the two microneedle patches 3 are staggered in the front-rear direction, that is, as shown in fig. 9, the concave regions 303 of the left microneedle patch 3 are opposite to the non-concave regions of the right microneedle patch 3. Compared with the rectangular microneedle patch 3, the microneedle patch can disperse stress received near a wound, reduce local stress of skin around the wound, and enable comfort level of a patient to be higher.

In particular, the distance of the concave region 303 toward the base block 102 of the corresponding susceptor 1 is denoted as d, and the height of the microneedle 301 is denoted as h. Fresh pork is adopted for testing, surface moisture is wiped, after one of the bases 1 is attached to the pork, the base 1 is transversely pulled (namely pushed leftwards along the plugging direction of the base 1, for example, the base 1 on the right side of fig. 9) by a tension meter until the microneedle patch 3 is separated from the surface of the pork, and the maximum tension born by the microneedle patch 3 is recorded as critical gripping force. The average critical grip force of the microneedle patch 3 without the recessed area 303 (i.e., the opposite end of the two microneedle patches 3 is linear, or the microneedle patch 3 is rectangular) is denoted as F1, and the average critical grip force of the microneedle patch 3 with the recessed area 303 is denoted as F2. When d/h=10 to 33, F2 is 1.3 to 1.5 times that of F1. Therefore, the microneedle patch 3 having the concave region 303 is preferably used, and d/h=10 to 33.

Alternatively, the concave region 303 may be triangular as shown in fig. 9, or may be an arc-shaped region as shown in fig. 13, or may be a recess of another shape.

Further, for the microneedle patches 3 on the two bases 1, the microneedles 301 on the two microneedle patches 3 are staggered. That is, as shown in fig. 1 and 9, the microneedles 301 of the left microneedle patch 3 are offset from the microneedles 301 of the right microneedle patch 3 in the front-rear direction. Thus, the effective area of pushing the skin by all the microneedles 301 can be increased, and the wound closure effect can be improved.

Further, as shown in fig. 10, each base block 102 has a plugging protrusion 110 and a plugging groove 111 along two sides perpendicular to the plugging direction of the base 1, as two mutually plugged bases 1 in fig. 1 are a group of closer groups, the closer groups can be arranged side by side, and the plugging protrusions 110 and the plugging grooves 111 of the bases 1 of adjacent closer groups are spliced unidirectionally, that is, the bases 1 of adjacent groups can be spliced, but cannot be disassembled, so that separation of the bases 1 in the wound recovery process is avoided, and recovery of a wound is affected. An appropriate number of closer groups can be arranged according to the length of the wound, so that wound closers with different widths can be formed, and the wound closer can be suitable for wounds with different lengths. The existing wound closers are usually of fixed size, and for wounds of different lengths, different types of wound closers need to be selected, so that various types of product molds or production lines are needed, and the production cost is high. The scheme only needs one or a few types of bases 1 as basic units, does not need a plurality of dies or production lines, has wide application range, is convenient to carry, and can be used as an emergency medical product.

Accordingly, the width of the handle 4 may be set to be equal to the total width of all the closer groups, or, the two sides of the handle 4 may be provided with handle splicing protrusions and handle splicing grooves, each closer group is provided with one handle 4, and adjacent handles 4 may be spliced by the handle splicing protrusions and the handle splicing grooves.

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "front", "rear", "left", "right", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. The wound closer comprises two bases (1), wherein one ends of the two bases (1) are mutually inserted, and an adhesive layer (2) is arranged on the bottom surface of each base (1), and the wound closer is characterized in that a microneedle patch (3) is also fixed on the bottom surface of one end of each base (1), and a plurality of microneedles (301) are arranged on the bottom surface of each microneedle patch (3); one end of each of the two microneedle patches (3) opposite to each other is provided with concave areas (303) which are arranged at intervals along the direction perpendicular to the inserting direction of the two bases (1), each concave area (303) of each microneedle patch (3) is concave towards the direction of the other microneedle patch (3), the concave areas (303) of the two microneedle patches (3) are distributed in a staggered manner along the direction perpendicular to the inserting direction of the two bases (1), the concave distance between each concave area (303) and the other microneedle patch (3) is denoted as d, the height of each microneedle (301) is denoted as h, and d/h=10-33;

each base (1) comprises a substrate (101), a base block (102) and locking strips (103), two ends of the base block (102) are fixedly connected with the substrate (101) and the locking strips (103) respectively, the base block (102) is provided with locking parts (104), the locking strips (103) of two bases (1) are oppositely arranged, and one locking strip (103) of one base (1) is inserted into the locking part (104) of the other base (1) and is unidirectionally positioned;

the portable electric power tool further comprises a handle (4), wherein the handle (4) is respectively connected with the two base blocks (102) in a sliding mode along the inserting direction perpendicular to the two bases (1).

2. A wound closure device according to claim 1, wherein the handle (4) comprises a first handle body (401) and a second handle body (402), the lower end of the first handle body (401) and the lower end of the second handle body (402) being detachably connected to the two base blocks (102), respectively; the middle part of the first handle body (401) is hinged with the middle part of the second handle body (402), or the upper end of the first handle body (401) is fixedly connected or hinged with the upper end of the second handle body (402).

3. A wound closure device according to claim 1, wherein the opposite end faces of the two base blocks (102) are bevels (105) extending from top to bottom towards their other ends.

4. A wound closure device according to claim 1, wherein the base blocks (102) are notched (106) at the bottoms of opposite ends thereof.

5. A wound closure according to claim 1, wherein the bottom surface of the base block (102) has grooves (107).

6. A wound closure device according to any one of claims 1-5, wherein the microneedles (301) on two of the microneedle patches (3) are inclined towards each other.

7. A wound closure according to claim 6, wherein the density of the microneedles (301) on the microneedle patch (3) is less near one end of the respective base (1) than near the other end of the respective base (1).