Skin suture tension controller

Abstract

The present invention relates to the technical field of medical devices, and discloses a skin suture tension controller, including a housing, a ratchet assembly, a knob cover and a pull wire. The housing is hollow with an installation cavity, and the ratchet assembly includes an upper ratchet, a lower ratchet and a pawl. The lower ratchet rotates a rotating shaft sleeved on the bottom of the installation cavity, and the lower ratchet selectively docks with the upper ratchet to engage the transmission; the top of the housing is provided with an installation opening with an inner ratchet portion in the inner ring, and when the pawl is connected to the upper ratchet and engages with the inner ratchet portion, the upper ratchet can only rotate in the tightening direction; a pull wire hole is provided on the side of the housing, and the two ends of the pull wire are aligned and pass through the pull wire hole and are wound around the lower ratchet. The bottom of the knob cover is connected to the upper ratchet, and a control docking groove is provided on the top. The structure is simple and stable, and the fluctuation in use is small, which effectively improves the patient's treatment experience; the production cost is low, and it is easy to assemble; it can accurately control and realize stepless adjustment of the tension, and improve the scope of application.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a skin suture tension controller. Background Art

[0002] Surgical operations such as tumor resection or fasciotomy can cause large-area skin trauma, and some chronic wounds such as diabetes and ulcers usually cannot heal on their own. In the past, the wound was closed directly with needles and threads, but some wounds had skin defects that could not be directly closed by pulling the wound surface together. They often needed to be closed with flap transplantation and tension-reducing incisions, which caused great damage and high costs, and added great pain to the patients. In the medical field, especially in the field of surgery, the use of a skin suture tension controller is a common surgical method. It mainly uses a pulling line technology, which uses sutures to suture multiple sites but does not tie a knot. The sutures are tightened every day, and the skin on both sides of the wound are gradually approached and fitted through the natural expansion of the skin to finally close the wound surface. It is used to pull the skin tissue on both sides of the wound together to promote wound healing. In this process, the skin suture tension controller applies a certain tension around the wound, so that the wound can heal under appropriate tension, thereby reducing scar formation, shortening the treatment time, and improving the effect of the operation.

[0003] In the solutions of the prior art, the skin suture tension controller usually adopts a manually adjustable design. By rotating the coil spring, when a certain preset force is reached, the coil spring can jump to lock the switch valve, so that a constant closing tension can be applied to the wound. Each skin suture tension controller can only output a fixed tension value. In actual treatment, the pulling force is often too large for small wounds, and too small for large wounds. As the wound gradually heals, the skin tension around the wound will gradually decrease, and the wound cannot be given a matching tension value in time, thus limiting its scope of application. However, the existing skin suture tension controller still has some problems in practical applications.

[0004] First, the daily pulling and closing action requires medical staff to better master the pulling and closing strength based on the accumulation of clinical experience. Although the normal skin condition of the human body can withstand a tension of about 1 kg, the skin tension that can be tolerated by patients of different ages and physical conditions, different diseases and wound sites is different, which can easily lead to serious deviations in the data, and the skin tension value that matches the skin with special conditions cannot be output. Therefore, when doing skin pulling and closing actions, the strength is very difficult to control. Too little pulling and closing strength will lead to poor pulling and closing effects, prolonged healing time, or even missing the best healing time period, while too much pulling and closing strength will easily lead to secondary damage to the skin, causing more serious injuries.

[0005] Second, since the wound usually needs to be covered with medical supplies such as gauze to create a sterile environment and prevent wound infection, the controller pull wire needs to be loosened every day to change the gauze and dressing. After changing the gauze and medicine, pull the controller again. The existing skin suture tension controller has constant force springs and pull wire accuracy that affect the tension value, which is difficult to control, resulting in large fluctuations in the tension range output by the controller, and the release noise is loud, and it is easy to pull the skin, affecting the patient experience.

[0006] Third, the existing skin suture tension controller has many parts, of which outsourced parts and machined parts account for two-thirds of the total number. Machining is a non-mass production process with high processing costs; the quality control of outsourced parts is difficult and the cost is high. Not only does the overall appearance and structure take up a large space, but the production and assembly efficiency is low and the cost is high, making it difficult to promote in the market.

[0007] Therefore, a skin suture tension controller is urgently needed to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to provide a skin suture tension controller, which can quickly release the pull line and tension, has a simple structure, is stable and controllable as a whole, is long-lasting and quiet to use, can effectively reduce fluctuations, improve the patient's treatment experience, and is convenient for disassembly or changing gauze and dressings on the wound; the tension value can be adjusted according to the actual situation of the skin and the suture requirements, and has a wide tension value output range, thereby increasing the scope of application; and the stepless adjustment of the pulling force is achieved to meet the precise control of the tension value.

[0009] To achieve this object, the present invention adopts the following technical solutions:

[0010] Skin suture tension controller, including:

[0011] A housing, wherein a mounting cavity is provided in the hollow interior of the housing, a rotating shaft is provided at the bottom of the mounting cavity; a mounting opening is provided at the top of the housing, an inner ring of the mounting opening is provided with an inner ratchet portion, and the mounting opening is communicated with the mounting cavity; a wire pulling hole is provided at the side of the housing;

[0012] A ratchet assembly, wherein the ratchet assembly comprises an upper ratchet, a lower ratchet and a pawl, wherein the lower ratchet is rotatably sleeved on the rotating shaft; the lower ratchet is provided with a docking shaft, which is coaxially arranged with the rotating shaft, and the upper ratchet is provided with a docking hole, wherein the docking shaft can be selectively placed in the docking hole so that the lower ratchet and the upper ratchet are meshed and transmitted; the positioning end of the pawl is connected to the outer edge of the upper ratchet, and the non-return end of the pawl is selectively contacted and meshed with the inner ratchet portion; when the non-return end is contacted and meshed with the inner ratchet portion, the upper ratchet can only rotate relative to the housing in the tightening direction;

[0013] A knob cover, the bottom of which is connected to the upper ratchet, and the top of which is provided with a control docking groove, wherein the control docking groove is coaxially arranged with the rotating shaft;

[0014] A pull wire, both ends of which are aligned and pass through the pull wire hole together, and can be wound around the outer periphery of the lower ratchet.

[0015] As an optional technical solution for the skin suture tension controller, the pawl includes a flexible section, and the two ends of the flexible section are respectively integrally provided with the positioning end and the non-return end.

[0016] As an optional technical solution for the skin suture tension controller, a positioning buckle is provided on the outer edge of the upper ratchet, and the positioning end is engaged with the positioning buckle.

[0017] As an optional technical solution for the skin suture tension controller, the knob cover is provided with a lifting stop buckle. When the knob cover is lifted up along the axial direction of the docking shaft until the docking shaft is disengaged from the docking hole, the lifting stop buckle is engaged with the shell to limit the axial travel of the knob cover.

[0018] As an optional technical solution for the skin suture tension controller, the upper ratchet is provided with positioning grooves around the docking hole, and the knob cover is provided with a hole stopper, which can be placed in the positioning groove and engaged with the upper ratchet.

[0019] As an optional technical solution for the skin suture tension controller, the shell is provided with a disengagement limit portion, and the lower ratchet can selectively abut against the disengagement limit portion so that the docking shaft can be disengaged from the docking hole.

[0020] As an optional technical solution for a skin suture tension controller, a first wire winding groove and a second wire winding groove are arranged around the outer periphery of the lower wheel, and the lower ratchet is provided with a first wire threading hole, a second wire threading hole, a third wire threading hole and a fourth wire threading hole, the first wire threading hole and the first wire winding groove have the same axial height along the lower ratchet, and the fourth wire threading hole and the second wire winding groove have the same axial height along the lower ratchet; one end of the pull wire passes through the first wire threading hole and then reversely passes through the second wire threading hole and is tied, and the pull wire at this end is wound around the first wire winding groove; the other end of the pull wire passes through the fourth wire threading hole and then reversely passes through the third wire threading hole and is tied, and the pull wire at this end is wound around the second wire winding groove.

[0021] As an optional technical solution for the skin suture tension controller, a limiting ridge is provided in the pull wire hole, and the limiting ridge divides the pull wire hole into two left and right single-wire holes, and the two ends of the pull wire are respectively passed through the two single-wire holes and then aligned.

[0022] As an optional technical solution for the skin suture tension controller, the bottom of the mounting cavity is provided with a friction-reducing surface around the rotating shaft, and the lower ratchet is rotatably placed on the friction-reducing surface.

[0023] As an optional technical solution for a skin suture tension controller, the skin suture tension controller includes a torque wrench, the torque head assembly of the torque wrench is provided with a preset maximum torque, the docking head of the torque head assembly can be inserted into the control docking groove, so that the torque wrench and the knob cover can selectively rotate together, and when the torque applied by the torque wrench to the knob cover reaches the preset maximum torque, the handle assembly of the torque wrench and the torque head assembly rotate relative to each other.

[0024] Beneficial effects of the present invention:

[0025] The skin suture tension controller provided by the present invention has a wire hole on the side of the shell, and the two ends of the wire are aligned and passed through the wire hole and wrapped around the lower ratchet; the bottom of the knob cover is connected to the upper ratchet, and the top is provided with a control docking groove. By lifting the knob cover, the ratchet pawl is separated from the inner ratchet part of the shell, and the docking shaft of the lower ratchet is disengaged from the docking hole of the upper ratchet, and the docking between the upper ratchet and the lower ratchet is released, which can quickly release the wire and tension, and the skin suture tension controller can be disassembled or the gauze and dressing on the wound can be changed. When the knob cover is pressed down to make the upper ratchet and the lower ratchet dock and drive, the lower ratchet can be driven to start rotating by controlling the knob cover of the docking groove according to the actual situation of the skin and the suturing requirements, so that the pull line is gradually wrapped around the outer periphery of the lower ratchet, that is, the pulling force applied by the skin suture tension controller to the wound gradually increases, so as to adjust the magnitude of the tension value and make the skin suture tension controller have a wide output range of tension value, greatly improving the application range of the skin suture tension controller; at the same time, the downward pressure of the knob cover also connects the pawl with the inner ratchet part of the shell, which can prevent the ratchet assembly from reversing and causing the pull line to loosen, realize the stepless adjustment of the pulling force, and meet the precise control of the tension value. The elastic structure is cancelled, the whole is more stable and controllable, the use is long-lasting and quiet, can effectively reduce fluctuations, avoid pulling the skin, and effectively improve the patient's treatment experience; the number of parts is small and the size is small, the quality controllability is high, the production cost can be greatly reduced, the production efficiency is high, not only more space-saving, but also easy to install quickly, can be widely promoted in the market and applied in the field. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a skin suture tension controller provided by a specific embodiment of the present invention;

[0027] Figure 2 is a cross-sectional view of a skin suture tension controller provided by a specific embodiment of the present invention without a pull line;

[0028] Figure 3 It is a schematic diagram of the installation of the ratchet assembly and the housing of the skin suture tension controller provided by a specific embodiment of the present invention;

[0029] Figure 4 It is a structural schematic diagram of a knob cover of a skin suture tension controller provided in a specific embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of an upper ratchet wheel of a skin suture tension controller provided in a specific embodiment of the present invention;

[0031] Figure 6 It is a structural schematic diagram of a ratchet of a skin suture tension controller provided in a specific embodiment of the present invention;

[0032] Figure 7 It is a schematic structural diagram from a first perspective of a lower ratchet wheel of a skin suture tension controller provided by a specific embodiment of the present invention;

[0033] Figure 8 It is a second perspective structural schematic diagram of the lower ratchet wheel of the skin suture tension controller provided by a specific embodiment of the present invention;

[0034] Fig. 9 It is a schematic diagram of the installation of a ratchet assembly of a skin suture tension controller provided in a specific embodiment of the present invention;

[0035] Fig.10 It is a structural schematic diagram of a shell of a skin suture tension controller provided in a specific embodiment of the present invention;

[0036] Fig.11 It is a structural schematic diagram of a torque wrench of a skin suture tension controller provided in a specific embodiment of the present invention.

[0037] In the figure:

[0038] 100, housing; 101, mounting cavity; 110, upper housing; 111, inner ratchet portion; 112, limiting ridge; 113, single-line hole; 114, disconnection limiting portion; 115, bridge positioning groove; 120, lower housing; 121, rotating shaft; 122, anti-friction surface; 123, positioning column;

[0039] 200, ratchet assembly; 210, upper ratchet; 211, docking hole; 212, positioning buckle; 213, positioning groove; 220, lower ratchet; 221, docking shaft; 222, spoke; 223, winding shaft; 2231, first winding groove; 2232, first threading hole; 2233, second threading hole; 2234, second winding groove; 2235, third threading hole; 2236, fourth threading hole; 2237, first tie groove; 2238, second tie groove; 224, rotating shaft hole; 230, pawl; 231, positioning end; 232, flexible section; 233, non-return end;

[0040] 300, knob cover; 301, control docking slot; 302, anti-disassembly buckle; 303, hole buckle; 304, lifting buckle;

[0041] 400, pull wire; 500, bridge pipe;

[0042] 600, torque wrench; 610, torque head assembly; 611, docking joint; 620, handle assembly. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] like Figures 1 to 11As shown in the figure, the present invention discloses a skin suture tension controller, including a housing 100, a ratchet assembly 200, a knob cover 300 and a pull line 400. The housing 100 is hollow inside and is provided with an installation cavity 101, and a rotating shaft 121 is provided at the bottom of the installation cavity 101; the ratchet assembly 200 includes an upper ratchet 210, a lower ratchet 220 and a ratchet 230, and the lower ratchet 220 is rotatably sleeved on the rotating shaft 121. The lower ratchet 220 is provided with a docking shaft 221, and the docking shaft 221 is coaxially arranged with the rotating shaft 121, and the upper ratchet 210 is provided with a docking hole 211, and the docking shaft 221 can be selectively placed in the docking hole 211, so that the lower ratchet 220 and the upper ratchet 210 are meshed and transmitted. A mounting opening is provided at the top of the housing 100, and an inner ratchet portion 111 is provided at the inner ring of the mounting opening, and the mounting opening is communicated with the mounting cavity 101; the positioning end 231 of the pawl 230 is connected to the outer edge of the upper ratchet 210, and the non-return end 233 of the pawl 230 selectively contacts and engages with the inner ratchet portion 111; when the non-return end 233 contacts and engages with the inner ratchet portion 111, the upper ratchet 210 can only rotate relative to the housing 100 in the tightening direction. A wire pulling hole is provided on the side of the housing 100; the two ends of the wire pulling wire 400 are aligned and pass through the wire pulling hole together, and can be wound around the outer periphery of the lower ratchet 220. The bottom of the knob cover 300 is connected to the upper ratchet 210, and a control docking groove 301 is provided on the top of the knob cover 300, and the control docking groove 301 is coaxially arranged with the rotating shaft 121. The knob cover 300 is pressed down, and the docking shaft 221 is placed in the docking hole 211, so that the upper ratchet 210 fixed to the knob cover 300 is docked with the lower ratchet 220; the knob cover 300 is rotated by controlling the docking groove 301, thereby driving the lower ratchet 220 to start rotating, and the pull line 400 is gradually wound around the outer periphery of the lower ratchet 220, that is, the pulling force applied by the skin suture tension controller to the wound gradually increases. At the same time, the downward pressure of the knob cover 300 also connects the pawl 230 with the inner ratchet part 111 of the housing 100, which can prevent the ratchet assembly 200 from reversing and causing the pull line 400 to loosen. When the knob cover 300 is lifted, the pawl 230 is separated from the inner ratchet portion 111 of the shell 100, and the docking shaft 221 of the lower ratchet 220 is disengaged from the docking hole 211 of the upper ratchet 210. At this moment, when the pull wire 400 is pulled, the pull wire 400 will lose the winding tension, and the pull wire 400 can be loosened to disassemble the skin suture tension controller or change the gauze or dressing on the wound.

[0048] The skin suture tension controller releases the tension of the pull wire 400 by lifting the knob cover 300. Compared with the loud noise generated when the constant force spring is released, the structure of the elastic part is eliminated. The overall structure is more stable and long-lasting and controllable. It is quieter when used and can effectively reduce fluctuations. The pull wire 400 is released quickly to avoid pulling the skin, effectively improving the patient's treatment experience.

[0049] By adopting the structure of this skin suture tension controller, the tension value can be adjusted and the required tension value can be output according to the actual skin condition and suture requirements. This will greatly improve the application scope of the skin suture tension controller, so that it has a wide tension value output range to meet the healing needs of all wound types; and it can realize stepless adjustment of the pulling force and achieve precise control of the tension value.

[0050] In order to reduce the production cost of the skin suture tension controller, the overall size is reduced by half compared with the existing controller, and the number of parts is reduced by one third year-on-year, which not only saves more space but also facilitates quick installation. All parts can adopt the injection molding structure design, with high quality controllability, injection molding parts can be mass-produced, and the production efficiency is high. By eliminating complex procurement, processing, and assembly processes, the production cost can be greatly reduced, and the production efficiency can be effectively improved. It can be widely promoted in the market and applied in the field.

[0051] In this embodiment, if Fig.11 As shown in , the skin suture tension controller is simultaneously connected to a torque wrench 600 with a preset torque value. The torque wrench 600 includes a replaceable torque head assembly 610. Each torque head assembly 610 is correspondingly provided with a preset maximum torque. The appropriate torque head assembly 610 can be selected after evaluating the skin around the wound; the selected torque head assembly 610 is connected and installed with the handle assembly 620 of the torque wrench 600; the docking head 611 of the torque head assembly 610 can be inserted into the control docking groove 301, so that the torque wrench 600 and the knob cover 300 can selectively rotate together. When the handle is turned, the plug-in shaft of the torque head assembly 610 rotates together with the handle, converting the elastic compression stroke of the elastic member. The magnitude of the elastic force can be obtained by Hooke's law, which is the product of the elastic compression stroke and the elastic coefficient; and the elastic force is multiplied by the radius of the docking head 611 to obtain the instantaneous torque value of the torque wrench 600. When the torque applied by the torque wrench 600 to the knob cover 300 reaches the preset maximum torque, the handle assembly 620 and the torque head assembly 610 of the torque wrench 600 begin to rotate relative to each other. It has an intuitive force value display function to realize the implementation monitoring of the force value, so that medical personnel can intuitively see the current torque value during the operation; and it stops working after reaching the preset maximum torque, without having to pay attention to the force value and the rotation angle of the knob cover 300 at the same time, which reduces the complexity of the operation, improves the accuracy of the operation, controls the torque more safely, simplifies the operation process, saves time and effort, and improves the efficiency of the operation.

[0052] By selecting a torque wrench 600 with a larger preset maximum torque value, the skin suture tension controller can effectively tighten the large wound. As the wound heals and shrinks, the torque wrench 600 with a smaller preset maximum torque value is gradually replaced to facilitate the control operation of medical staff. Compared with the existing controller, medical staff are required to operate with both hands at the same time, and due to the effect of blood, the rotating knob structure may slip, which not only increases the difficulty of operation, but also may cause the pull line 400 to be pulled to the skin by uncontrollable additional force, increasing the patient's pain. In order to solve this pain point, a control docking groove 301 that matches the torque wrench 600 is added to the skin suture tension controller, and medical staff only need to use the torque wrench 600 to rotate the knob cover 300 with one hand, which greatly simplifies the operation process and reduces the difficulty of operation. At the same time, due to the absence of the effect of blood, the risk of slipping can be effectively reduced, the pain of the patient is reduced, and the patient's treatment experience is improved. Therefore, it can be widely used in application fields such as medical equipment, surgical instruments, and skin suture equipment. The skin suture tension controller has broad market demand and good application prospects, and can better meet clinical needs and improve surgical effects.

[0053] For example, the control docking slot 301 on the knob cover 300 is set as an inner hexagonal slot, which matches the outer hexagonal docking head 611. At the same time, the knob cover 300 is also provided with a knob hand position, which can also be manually rotated. The two rotation hand positions are respectively set on both sides of the control docking slot 301, corresponding to the thumb and index finger of the medical staff during operation, so as to facilitate the operation of the knob cover 300.

[0054] Specific as Figure 4 As shown, the knob cover 300 is provided with a lifting stop buckle 304, and a stop flange is convexly provided on the outer edge of the four sides of the installation opening on the housing 100. When the knob cover 300 is lifted up along the axial direction of the docking shaft 221 until the docking shaft 221 is separated from the docking hole 211, the lifting stop buckle 304 is engaged with the stop flange to limit the axial travel of the knob cover 300, so as to prevent the knob cover 300 from being disconnected from the housing 100 and falling apart. In this embodiment, three lifting stop buckles 304 are distributed on the inner circumference of the bottom edge of the knob cover 300 to further prevent the knob cover 300 from being disconnected from the housing 100.

[0055] Furthermore, the knob cover 300 is provided with an anti-disassembly stop buckle 302, and a corresponding stop flange is also protruded on the outer edge of the upper ratchet 210. The anti-disassembly stop buckle 302 and the stop flange of the upper ratchet 210 maintain a stable clamping connection along the axial direction to ensure that the knob cover 300 and the upper ratchet 210 are relatively axially stationary.

[0056] Specifically, the upper ratchet 210 is provided with positioning grooves 213 around the docking hole 211, and the knob cover 300 is provided with a hole stop buckle 303. The hole stop buckle 303 can be placed in the positioning groove 213 and engaged with the upper ratchet 210, ensuring that the knob cover 300 and the upper ratchet 210 are relatively stationary in the radial plane, preventing the upper ratchet 210 from rotating relative to the knob cover 300, so that the upper ratchet 210 and the knob cover 300 become a relatively stationary whole.

[0057] Continue to refer Figure 6 The pawl 230 includes a flexible section 232, and the two ends of the flexible section 232 are respectively integrally provided with a positioning end 231 and a non-return end 233. When the knob cover 300 drives the upper ratchet 210 to rotate, the flexible section 232 of the pawl 230 can be deformed so that the non-return end 233 slides on the inner ratchet part 111 in a direction opposite to the non-return direction; when the knob cover 300 moves to a suitable position, the non-return end 233 abuts against the inner ratchet part 111 to limit the rotation of the knob cover 300. Exemplarily, three pawls 230 are evenly arranged along the circumference of the upper ratchet 210.

[0058] In this embodiment, a positioning buckle 212 is provided on the outer edge of the upper ratchet 210, and the positioning end 231 is engaged with the positioning buckle 212, which can specifically limit the pawl 230 to remain stationary in the circumferential direction of the upper ratchet 210, and keep the bottom of the positioning end 231 of the pawl 230 in contact with the positioning buckle 212. The pawl 230 can be fixed on the upper ratchet 210 and set relatively still with the knob cover 300. When the knob cover 300 is lifted, the upper ratchet 210 can lift the pawl 230 and maintain relative stability, so that the non-return portion of the pawl 230 is disengaged from the inner ratchet portion 111, thereby facilitating the release of the pull wire 400.

[0059] Specific as Figure 7 and Fig. 9 As shown in , the docking shaft 221 is formed by two legs with a clamping joint arranged relative to each other at a preset distance. The tops of the two clamping joints have a conical surface, which can be slid into the docking hole 211 and deformed, so that the two legs are relatively close to each other to reduce the overall outer diameter of the two clamping joints. After the two clamping joints pass through the docking hole 211, they recover their deformation, and the lower ratchet 220 can be clamped on the upper ratchet 210 through the docking shaft 221, so that the upper ratchet 210 and the lower ratchet 220 maintain stable meshing transmission. It can be understood that the ratchet teeth of the upper ratchet 210 and the lower ratchet 220 are only one of the actual implementation methods. The upper ratchet 210 and the lower ratchet 220 can be replaced with an upper rotating member capable of installing a pawl 230 and a lower rotating member capable of winding the pull wire 400, respectively, as long as it is ensured that the upper rotating member and the lower rotating member can be selectively docked and can be rotated synchronously after docking.

[0060] Optionally, the shell 100 includes an upper shell 110 and a lower shell 120, and the upper shell 110 and the lower shell 120 are jointly arranged to form an installation cavity 101, and the installation opening is arranged in the upper shell 110. The upper shell 110 and the lower shell 120 are installed by snapping together through positioning columns 123. The shell 100 is set as a split structure, which can further facilitate the assembly and disassembly of the skin suture tension controller, improve installation efficiency, and facilitate maintenance. A disengagement limit portion 114 is provided on the upper shell 110, and the disengagement limit portion 114 cooperates with the lower ratchet 220 along the axial clearance, and the lower ratchet 220 can selectively abut against the disengagement limit portion 114; when the knob cover 300 is lifted to make the docking hole 211 of the upper ratchet 210 disengage from the docking shaft 221 of the lower ratchet 220, the lower ratchet 220 maintains abutment with the disengagement limit portion 114, giving the lower ratchet 220 an axial limiting force so that the docking shaft 221 can smoothly disengage from the docking hole 211, and can effectively prevent the lower ratchet 220 from following without locking the lower ratchet 220 and keeping the various components of the ratchet assembly 200 flexibly installed, thereby further helping the lower ratchet 220 to better disengage and separate from the upper ratchet 210.

[0061] Working principle of skin suture tension controller

[0062] When the skin suture tension controller is in the treatment working state, the pull wire needs to be gradually tightened, so it is necessary to press down the knob cover 300, and the pawl 230 on the outer periphery of the knob cover 300 is connected to the inner ratchet part 111 of the shell 100, which can prevent the ratchet assembly 200 from reversing and keep the ratchet assembly 200 only able to rotate clockwise; because the knob cover 300 and the upper ratchet 210 are relatively fixed by the anti-disassembly buckle 302, the docking shaft 221 of the lower ratchet 220 is inserted into the docking hole 211 of the upper ratchet 210, and the upper ratchet 210 and the lower ratchet 220 are docked to achieve synchronous rotation; the docking groove 301 is controlled to make the knob cover 300 start to rotate clockwise, thereby driving the lower ratchet 220 to rotate clockwise, and the pull wire 400 will gradually be wound around the outer periphery of the lower ratchet 220 and gradually tightened, that is, the skin suture tension controller will gradually shrink the coil of the pull wire 400 outside the pull wire hole to pull the wound to gradually close.

[0063] When the skin suture tension controller is in the cyclic reset state, the pull wire needs to be released quickly, so the knob cover 300 needs to be lifted up, and the pawl 230 will be separated from the inner ratchet portion 111 of the shell 100; because the disengagement limit portion 114 is kept in contact with the lower ratchet 220, the docking shaft 221 of the lower ratchet 220 will be disengaged from the docking hole 211 of the upper ratchet 210 until the knob cover 300 is engaged with the lifting stop buckle 304 to prevent the knob cover 300 from being separated from the overall structure; at this time, the upper ratchet 210 is separated from the lower ratchet 220 and no longer rotates synchronously, which affects the outer pull wire hole 211 of the shell 100. The pull wire 400 is pulled and a certain external force is applied. The pull wire 400 can quickly drive the lower ratchet 220 and only drive the lower ratchet 220 to rotate counterclockwise relative to the lower shell 120. The pull wire 400 is gradually untangled and extends out along the single-line hole 113. The pull wire 400 can be quickly loosened, and the skin suture tension controller can be smoothly removed. Then, the wound in the middle of the closed treatment can be replaced with gauze and dressings, so that the skin suture tension controller can be reset for recycling, and the pull wire 400 can be rearranged again to continue pulling the wound until it is closed.

[0064] In this embodiment, a first winding groove 2231 and a second winding groove 2234 are arranged around the outer periphery of the lower ratchet 220, and the first winding groove 2231 and the second winding groove 2234 are arranged at intervals along the axial direction of the lower ratchet 220; the lower ratchet 220 is provided with a first threading hole 2232, a second threading hole 2233, a third threading hole 2235 and a fourth threading hole 2236, and the first threading hole 2232 has the same axial height as the first winding groove 2231, and the fourth threading hole 2236 has the same axial height as the second winding groove 2234.

[0065] Specifically, the lower ratchet 220 includes two upper and lower spokes 222 and a winding shaft 223 in the middle, and the first winding groove 2231 and the second winding groove 2234 are both arranged on the winding shaft 223; the winding shaft 223 is also provided with a first threading groove 2237 and a second threading groove 2238, and the first threading groove 2237 is provided with a first threading hole 2232 and a second threading hole 2233, and the second threading groove 2238 is provided with a third threading hole 2234. The wire hole 2235 and the fourth threading hole 2236 are convenient for accommodating the part of the pull wire 400 when it is folded back and forth for threading and tied into knots or other fixing methods; the upper and lower spokes 222 can prevent the pull wire 400 from detaching from the winding shaft 223, and keep the winding of the pull wire 400 stable. At the same time, the upper spoke 222 can abut against the disengagement limit portion 114, and at the same time, the lower ratchet 220 can be stably limited without affecting the winding and unwinding operations of the lower ratchet 220.

[0066] The two ends of the pull wire 400 are respectively arranged in one-to-one correspondence with the first wire tying groove 2237 and the second wire tying groove 2238. One end of the pull wire 400 is passed through the first wire threading hole 2232 and then reversely passed through the second wire threading hole 2233 and tied in the first wire threading groove 2237, thereby completing the end fixation of one end of the pull wire 400. The remaining extended portion of the pull wire 400 that has not entered the first wire threading hole 2232 can be wound around the first winding groove 2231; the other end of the pull wire 400 is passed through the fourth wire threading hole 2236 and then reversely passed through the third wire threading hole 2235 and tied in the second wire tie groove 2238, thereby completing the end fixation of the other end of the pull wire 400. The remaining extended portion of the pull wire 400 that has not entered the fourth wire threading hole 2236 can be wound around the second winding groove 2234. The pull wire 400 used in this embodiment is thinner and softer in texture, and cannot be fixed to the lower ratchet 220 by threading it around, and needs to be fixed by tying it. However, it can better fit wounds of different positions and shapes, thereby expanding the scope of application.

[0067] In another embodiment, the pull wire 400 can be made of a steel pull wire with a harder texture and a thicker specification. The advantage of the steel pull wire is that the size of its outer diameter matches the inner diameter of the first threading hole 2232, the second threading hole 2233, the third threading hole 2235 and the fourth threading hole 2236, and can be directly inserted to ensure a certain friction resistance. The steel pull wire has plasticity and can be directly hooked on two of the threading holes without tying a knot again, thereby improving the relative stability of the pull wire 400 and the lower ratchet 220, simplifying the setting steps of the pull wire 400, and improving the use efficiency of the skin suture tension controller.

[0068] Different from the existing controller, the pull wire 400 is fixed by crimping the terminal. Since the terminal is small and difficult to automate, it is usually fixed by manual crimping. The reliability of crimping depends on the strength, proficiency and quality of the manual crimping. Therefore, the pull wire 400 is difficult and unstable to fix. The skin suture tension controller adopts a double-hole threading and slot storage method with a 180° end-to-end fold, which does not require crimping the terminal. At the same time, it can ensure the stability of the winding of the pull wire 400 and avoid the situation where the pull wire 400 is pressed against each other and causes line blockage.

[0069] Exemplarily, a limiting ridge 112 is provided in the pull wire hole, and the limiting ridge 112 divides the pull wire hole into two left and right single-wire holes 113. The two ends of the pull wire 400 pass through the two single-wire holes 113 respectively and are aligned; when the pull wire 400 is tightened to the limiting ridge 112, the limiting ridge 112 can block the pull wire 400 and easily pull it out again manually, so as to avoid the pull wire 400 being tightened and entering the inside of the installation cavity 101 and being difficult to take out again. The shell structure of the skin suture tension controller does not need to be disassembled each time and can be reused.

[0070] Further, in Fig.10In the embodiment, the bottom of the installation cavity 101 is provided with a friction-reducing surface 122 around the rotating shaft 121, that is, the mating surface of the housing 100 and the lower ratchet 220. The lower ratchet 220 is rotated and placed on the friction-reducing surface 122 to reduce the friction resistance between the housing 100 and the lower ratchet 220, so that when the pull line 400 is manually pulled out, the relative rotation of the lower ratchet 220 and the housing 100 is smooth and fluent, thereby improving the use efficiency of the skin suture tension controller; at the same time, it can reduce losses, reduce the frequency of replacing parts, and extend the service life of the skin suture tension controller. Continue to refer to Figure 2 and Figure 8 A shaft hole 224 is provided at the bottom of the lower ratchet 220 , and the rotating shaft 121 can be inserted into the shaft hole 224 , so that the lower ratchet 220 can cooperate with the rotating shaft 121 sleeved on the housing 100 to rotate, and at the same time, the bottom of the lower ratchet 220 can contact the friction-reducing surface 122 .

[0071] In this embodiment, the skin suture tension controller further includes a bridge tube 500, which is a long round tube with slight elasticity. A bridge positioning groove 115 is provided at the wire hole on the housing 100, and two single-line holes 113 are provided at the bottom of the bridge positioning groove 115. The inner diameter of the bridge positioning groove 115 is slightly smaller than the outer diameter of the bridge tube 500. One end of the bridge tube 500 is slightly squeezed to produce elastic deformation, so that it can be smoothly inserted into the bridge positioning groove 115 and abut against the bridge positioning groove 115. At the same time, the bridge tube 500 is connected with the two single-line holes 113, so that the bridge tube 500 can be well matched and fixed with the skin suture tension controller; the other end of the bridge tube 500 can be relatively easily docked and inserted into the skin anchor around the wound, which can protect and smoothly guide the pull wire 400 to hook with the skin anchor.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Skin suture tension controller, characterized in that: include: A shell (100), wherein the shell (100) is hollow and has an installation cavity (101), and a rotating shaft (121) is provided at the bottom of the installation cavity (101); a mounting opening is provided at the top of the shell (100), an inner ring of the mounting opening is provided with an inner ratchet portion (111), and the mounting opening is communicated with the installation cavity (101); and a wire pulling hole is provided on the side of the shell (100); A ratchet assembly (200), the ratchet assembly (200) comprising an upper ratchet (210), a lower ratchet (220) and a pawl (230), the lower ratchet (220) being rotatably sleeved on the rotating shaft (121); the lower ratchet (220) being provided with a docking shaft (221), the docking shaft (221) being coaxially arranged with the rotating shaft (121), the upper ratchet (210) being provided with a docking hole (211), the docking shaft (221) being selectively arranged in the docking hole ( 211), so that the lower ratchet (220) and the upper ratchet (210) are meshed and transmitted; the positioning end (231) of the ratchet pawl (230) is connected to the outer edge of the upper ratchet (210), and the non-return end (233) of the ratchet pawl (230) selectively contacts and engages with the inner ratchet portion (111); when the non-return end (233) contacts and engages with the inner ratchet portion (111), the upper ratchet (210) can only rotate relative to the housing (100) in the tightening direction; A knob cover (300), wherein the bottom of the knob cover (300) is connected to the upper ratchet (210), and the top of the knob cover (300) is provided with a control docking groove (301), and the control docking groove (301) is coaxially arranged with the rotating shaft (121); A pull wire (400), the two ends of which are aligned and pass through the pull wire hole together, and can be wound around the outer periphery of the lower ratchet (220); The outer periphery of the lower ratchet (220) is surrounded by a first wire winding groove (2231) and a second wire winding groove (2234); the lower ratchet (220) is provided with a first wire threading hole (2232), a second wire threading hole (2233), a third wire threading hole (2235) and a fourth wire threading hole (2236); the first wire threading hole (2232) and the first wire winding groove (2231) are at the same axial height along the lower ratchet (220); the fourth wire threading hole (2236) and the second wire winding groove (2234) are at the same axial height along the lower ratchet (220); ) are at the same axial height along the lower ratchet (220); one end of the pull wire (400) passes through the first threading hole (2232) and then passes through the second threading hole (2233) in the reverse direction and is tied, and the pull wire (400) at this end is wound around the first winding groove (2231); the other end of the pull wire (400) passes through the fourth threading hole (2236) and then passes through the third threading hole (2235) in the reverse direction and is tied, and the pull wire (400) at this end is wound around the second winding groove (2234); The skin suture tension controller comprises a torque wrench (600), a torque head assembly (610) of the torque wrench (600) being provided with a preset maximum torque, a docking head (611) of the torque head assembly (610) being insertable into the control docking groove (301), so that the torque wrench (600) and the knob cover (300) can selectively rotate together, and when the torque applied by the torque wrench (600) to the knob cover (300) reaches the preset maximum torque, the handle assembly (620) of the torque wrench (600) and the torque head assembly (610) rotate relative to each other.

2. The skin suture tension controller according to claim 1, characterized in that: The pawl (230) comprises a flexible section (232), and the two ends of the flexible section (232) are respectively integrally provided with the positioning end (231) and the non-return end (233).

3. The skin suture tension controller according to claim 2, characterized in that: The outer edge of the upper ratchet (210) is provided with a positioning buckle (212), and the positioning end (231) is engaged with the positioning buckle (212).

4. The skin suture tension controller according to claim 1, characterized in that: The knob cover (300) is provided with a lifting stop buckle (304). When the knob cover (300) is lifted up along the axial direction of the docking shaft (221) until the docking shaft (221) is disengaged from the docking hole (211), the lifting stop buckle (304) is engaged with the housing (100) to limit the axial travel of the knob cover (300).

5. The skin suture tension controller according to claim 1, characterized in that: The upper ratchet (210) is provided with positioning grooves (213) around the docking hole (211), and the knob cover (300) is provided with a hole stop buckle (303), and the hole stop buckle (303) can be placed in the positioning groove (213) and snap-fitted with the upper ratchet (210).

6. The skin suture tension controller according to claim 1, characterized in that: The housing (100) is provided with a disengagement limiting portion (114), and the lower ratchet (220) can selectively abut against the disengagement limiting portion (114) so ​​that the docking shaft (221) can be disengaged from the docking hole (211).

7. The skin suture tension controller according to claim 1, characterized in that: A limiting ridge (112) is arranged in the wire pulling hole, and the limiting ridge (112) divides the wire pulling hole into two left and right single-wire holes (113). The two ends of the wire pulling wire (400) pass through the two single-wire holes (113) respectively and are then aligned.

8. The skin suture tension controller according to claim 1, characterized in that: The bottom of the installation cavity (101) is provided with a friction-reducing surface (122) around the rotating shaft (121), and the lower ratchet (220) is rotatably placed on the friction-reducing surface (122).

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