A new skin and subcutaneous soft tissue defect puller

Abstract

A new type of skin and subcutaneous soft tissue defect puller. It is mainly composed of base, shell, spool, ratchet assembly and knob cover. On the fixed structure, the independent base is added and the skin suture fixing hole is set, which cooperates with the buckle pair of the base and the shell, effectively improving the fixing stability. In terms of operation assembly, the knob cover and the spool are connected through gear transmission pair and one-way ratchet structure, realizing "one-key tightening / release", convenient operation and adapting to emergency scenes. In terms of safety design, the split type threading hole reduces the wear of the wire rope, and the natural rubber protective cap reduces the risk of secondary skin damage. Through multiple anti-drop structures, the overall structural stability is enhanced, and the parts are prevented from disconnection. In addition, the modular base design can adapt to different sizes of skin defects, integrate deep pulling components, and simultaneously repair shallow and deep defects, greatly expanding the clinical application range, and providing a more efficient, safe and convenient solution for the treatment of skin and subcutaneous soft tissue defects.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a novel traction device for skin and subcutaneous soft tissue defects. Background Technology

[0002] In trauma surgery, a large number of patients suffer from skin and subcutaneous soft tissue defects. If muscles, tendons, and bones are exposed for extended periods, necrosis is highly likely, making timely wound closure crucial. However, existing skin traction devices have several shortcomings: First, most use metal nut-type knobs, resulting in poor patient comfort and requiring additional tools for adjusting skin tension, making operation cumbersome and impractical. Second, the common use of metal wires and claws for traction not only affects appearance and increases patient psychological stress but also increases the likelihood of wound infection due to the metallic properties. Third, the lack of specialized equipment for puncture and suture procedures necessitates the use of other surgical tools, causing additional damage to the patient's skin and increasing the risk of postoperative infection. Furthermore, existing traction devices are mostly designed for simple defects with uniform skin thickness, failing to meet the complex needs of patients with varying skin thicknesses in clinical practice. If only the surface skin is closed, cavities can easily form in the deeper soft tissues, leading to fluid and blood accumulation, thus affecting rehabilitation outcomes.

[0003] In existing technologies, skin traction devices have the following problems:

[0004] 1. Limited fixation method: Skin suture fixation holes are mostly located on the surface of the outer shell, making the sutures prone to loosening due to external force;

[0005] 2. High operational complexity: Threading and fixing the spool requires multiple disassembly and reassembly of components, resulting in low efficiency;

[0006] 3. Insufficient safety: It lacks a quick release mechanism, making it difficult to quickly loosen the rope in an emergency;

[0007] 4. Poor structural stability: Key components (such as the spool and the housing) are prone to detachment due to vibration or external force;

[0008] 5. Limitations in applicability: Existing devices are only suitable for superficial skin defects and cannot meet the needs of deep tissue traction.

[0009] Based on the existing technology with publication number CN108066036A, this utility model effectively solves the above-mentioned problems through a novel modular base design and ratchet mechanism. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a novel traction device for skin and subcutaneous soft tissue defects, so as to solve the above-mentioned problems existing in the prior art.

[0011] This invention, through innovative design, achieves the goals of conveniently adjusting skin tension, reducing the risk of infection, adapting to defects of different skin thicknesses, and minimizing additional trauma to patients.

[0012] To address the aforementioned technical problems, this application provides the following technical solution:

[0013] This utility model discloses a novel traction device for skin and subcutaneous soft tissue defects, comprising:

[0014] The components include a base (10), a housing (20), a spool (30), a ratchet assembly (40), and a knob cover (50).

[0015] The outer shell (20) is engaged with the base buckle (11) to fix the spool (30), and the spool (30) is adapted for multi-line operation through the double inlet holes (31, 32) and the double outlet holes (33, 34).

[0016] Preferably, the present invention provides a novel traction device for skin and subcutaneous soft tissue defects, wherein the inner teeth (A) of the knob cover (50) mesh with the outer teeth (B) of the spool to form a gear transmission pair, and a one-way ratchet locking is achieved through the ratchet spring (43) and the ratchet groove (41). When the knob cover (50) is raised, the ratchet mechanism fails to release the rope, and when it is pressed, the ratchet spring (43) is compressed, and the spool (30) rotates synchronously with the knob to retract the rope.

[0017] Preferably, the double inlet holes (31, 32) and double outlet holes (33, 34) of the spool (30) are arranged on both sides of the spool, and the spool (30) is doubly fixed by the outer shell buckle (21) and the base buckle (11) to prevent the spool (30) from axial displacement.

[0018] Preferably, the knob cover (50) is locked to the ratchet assembly (40) by the button cover snap (53), and the outer shell (20) is locked to the ratchet assembly (40) by the button outer shell snap (23), forming a multi-layer anti-detachment structure to ensure that the components are securely connected during use and will not detach or fall off.

[0019] Preferably, the base (10) is provided with a skin suture fixing hole for fixing the traction device to the skin.

[0020] Preferably, the core of the puller is steel wire and the outer sheath is made of flexible plastic material. The diameter of the inlet hole (31, 32) and outlet hole (33, 34) of the spool (30) is larger than the diameter of the puller. The inlet hole (31, 32) and outlet hole (33, 34) are designed separately to avoid the crossing of the threading path and reduce the wear of the rope.

[0021] Compared with the prior art, the novel traction device for skin and subcutaneous soft tissue defects of this utility model has at least the following beneficial effects:

[0022] 1. Improved ease of use: The cleverly designed adjustment components allow for easy adjustment of skin tension without the need for multiple tools, making operation simple and easy, greatly improving the patient's wearing experience and enhancing the product's practicality.

[0023] 2. Enhanced structural stability: The product's unique shell and base snap-fit ​​structures, along with gear structures and a one-way ratchet design, ensure a secure connection and normal operation of all components during use. These structures work together to effectively prevent components from disengaging or detaching during the fixing of the spool and the control of the pull line's extension and retraction, thus improving the product's stability and reliability.

[0024] 3. Ease of operation: The ratchet one-way locking enables "one-click tightening / releasing", shortening operation time and adapting to emergency scenarios;

[0025] 4. Safety Optimization: The split threading hole design reduces cable wear, and the natural rubber protective cap prevents secondary skin damage;

[0026] 5. Enhanced compatibility: The modular base can be adapted to skin defects of different sizes, expanding the scope of clinical application;

[0027] 6. Deep compatibility: Integrates deep traction components to achieve simultaneous repair of shallow and deep defects.

[0028] The present invention provides a novel traction device for skin and subcutaneous soft tissue defects, which will be further described below with reference to the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a novel traction device for skin and subcutaneous soft tissue defects according to this utility model;

[0030] Figure 2 This is a schematic diagram of the fit between the cap and the spool of a novel traction device for skin and subcutaneous soft tissue defects according to this utility model.

[0031] Figure 3 This is a schematic diagram showing the connection of two wires in a novel traction device for skin and subcutaneous soft tissue defects according to this utility model;

[0032] Figure 4 This is a schematic diagram of the working mechanism of the knob cover and ratchet spring of a novel skin and subcutaneous soft tissue defect traction device according to this utility model;

[0033] Figure 5 This is a schematic diagram showing the combination of the knob cover and ratchet spring of a novel skin and subcutaneous soft tissue defect traction device according to this utility model.

[0034] Figure 6 This is a schematic diagram showing the combination of the knob cover and the outer shell of a novel traction device for skin and subcutaneous soft tissue defects according to this utility model;

[0035] Figure 7 This is a cross-sectional view of the shell and ratchet spring of a novel skin and subcutaneous soft tissue defect traction device according to this utility model.

[0036] in:

[0037] 10...Base 11...Base buckle 20...Outer shell 21...Outer shell buckle 22...Gear on outer shell 23...Button outer shell buckle 30...Spool 31...First inlet hole 32...Second inlet hole 33...First outlet hole 34...Second outlet hole 40...Ratchet 41...Ratchet groove 42...Ratchet buckle 43...Ratchet spring 44...Ratchet buckle 50...Knob cover 51...Knob cover retainer 53...Button cover buckle A...Knob cover inner teeth B...Spool outer teeth. Detailed Implementation

[0038] The main improvements of this utility model are as follows:

[0039] 1. Modular base design: An independent base is added, and the skin suture fixation holes are transferred to the base to improve fixation stability;

[0040] 2. Double snap-fit ​​structure: Incorporating both outer shell snap-fit ​​and base snap-fit ​​to achieve quick locking and prevent detachment of the spool;

[0041] 3. Ratchet one-way locking mechanism: The precise winding and unwinding of the rope is achieved through the snap-fit ​​between the knob cover and the ratchet spring.

[0042] 4. Optimized cable threading design: It features dual inlet and dual outlet ports to simplify multi-wire operation.

[0043] like Figure 1 The diagram shown is a schematic representation of the overall structure of a novel traction device for skin and subcutaneous soft tissue defects according to this utility model.

[0044] It mainly includes a base 10, a housing 20, a spool 30, a ratchet 40, and a knob cover 50. It demonstrates the assembly relationship between the base 10, the housing 20, and the spool 30, and can also be used with a deep traction assembly.

[0045] This utility model discloses a novel traction device for skin and subcutaneous soft tissue defects. It employs a base 10 design, on which skin suture fixing holes are located. During operation, the spool 30 needs to be removed for threading and securing the suture. After securing the suture, the spool is then secured using the base clip 11 on the base 10 and the outer casing clip 21 on the outer casing 20. Finally, sutures are used to fix the base 10 to the skin.

[0046] like Figure 2 The diagram shows the cooperation structure between the cover and the spool of a novel traction device for skin and subcutaneous soft tissue defects according to this utility model. The gear transmission structure (AB meshing) is highlighted; the internal teeth A of the knob cover 50 and the external teeth B of the spool 30 form a gear structure. When the cover is pressed down, it can drive the spool to rotate, thereby retracting the cord.

[0047] When the knob cover 50 is lifted, the knob cover 50 separates from the spool 30, which can quickly release the thread from the spool.

[0048] like Figure 3 The diagram shows the connection of two wires in a novel traction device for skin and subcutaneous soft tissue defects according to this utility model. The knob cover 50 is provided with first and second inlet holes (31, 32) and first and second outlet holes (33, 34), clearly indicating the distribution of the inlet holes (31, 32) and outlet holes (33, 34).

[0049] See Figure 3 , Figure 4 and Figure 5 This diagram illustrates the engagement and connection of the knob cover and ratchet spring of a novel skin and subcutaneous soft tissue defect traction device according to this utility model. Figure 4 This diagram illustrates the working state of the knob cover and ratchet spring, demonstrating the winding (pressing down) and unwinding (lifting up) actions. The locking pin 51 of the knob cover 50 and the locking groove 41 of the ratchet 40 form a winch. When the knob cover 50 rotates, the spring 43 of the ratchet 40 and the gear 22 on the outer casing 20 form a one-way ratchet design. When the knob cover is lifted, the ratchet design is disengaged, losing its restraint on the spool and allowing the spool to quickly release the line.

[0050] Figure 5 The details of the knob cover and ratchet latch are shown, demonstrating the anti-disengagement mechanism of the knob cover latch (53) and ratchet latch (42); the button cover latch 53 and ratchet latch 42 together form a latching device to prevent the button cover 50 from disengaging from the ratchet 40.

[0051] like Figure 6The diagram shows the locking mechanism between the knob cover 50 and the outer casing 20 of a novel skin and subcutaneous soft tissue defect traction device according to this invention. It illustrates how the two components rely on a locking device formed between the knob cover latch 53 and the outer casing latch 23 to prevent the knob cover 50 from detaching.

[0052] Figure 7 This is a cross-sectional view of the outer shell and ratchet spring of a novel traction device for skin and subcutaneous soft tissue defects according to this utility model. It reveals the synergistic effect of the multiple locking system, where the button shell 23 and the ratchet 44 together form a locking device to prevent the button shell 20 from disengaging from the ratchet 40.

[0053] Its core improvements are as follows:

[0054] 1. Base and snap-fit ​​structure

[0055] The base 10 integrates skin suture fixing holes (unnumbered), which are directly anchored to the skin via sutures;

[0056] The base clip 11 and the outer casing clip 21 form a clip pair. After the spool 30 is installed, it is fixed by double clips to prevent axial displacement.

[0057] 2. Ratchet one-way locking mechanism

[0058] The inner tooth A of the knob cover 50 meshes with the outer tooth B of the spool, forming a gear transmission pair;

[0059] The ratchet spring 43 engages with the ratchet slot 41 to form a one-way ratchet structure.

[0060] When the knob cover is pressed down, the ratchet spring is compressed, and the spool rotates synchronously with the knob to wind up the thread;

[0061] When the knob cover is lifted, the ratchet spring returns to its original position, and the spool is able to release the thread freely due to the one-way locking of the ratchet.

[0062] 3. Anti-detachment buckle system

[0063] Button cover latch 53 and ratchet latch 42 lock the knob cover and ratchet;

[0064] The button housing buckle 23 and ratchet buckle 44 lock the housing and ratchet together, forming a multi-layer anti-detachment structure.

[0065] 4. Optimized threading design

[0066] The spool 30 is equipped with two inlet holes (31, 32) and two outlet holes (33, 34) to support multi-line parallel operation;

[0067] The inlet and outlet holes are located on both sides of the spool to avoid crossover of the threading path and improve operational efficiency.

[0068] In summary, this invention optimizes the fixing structure: an independent base is added, and the skin suture fixing hole is located on the base, with the suture thread anchored to the skin, improving fixing stability. The base buckle and the outer shell buckle form a buckle pair, doubly fixing the spool and preventing its axial displacement.

[0069] The operating components have been upgraded: the internal teeth of the knob cover mesh with the external teeth of the spool to form a gear transmission pair, which, combined with the ratchet spring and ratchet slot, forms a one-way ratchet structure. Pressing down the knob cover retracts the line, and lifting it releases the line, achieving "one-button tightening / releasing," making operation convenient and suitable for emergency scenarios.

[0070] Enhanced safety design: Features a split threading hole system, with dual inlet and outlet holes on either side of the spool to prevent threading paths from crossing and reduce cable wear. Equipped with a natural rubber protective cap, it reduces the risk of secondary skin injury and improves overall safety.

[0071] Enhanced structural stability: The design incorporates multiple anti-detachment mechanisms, with the button cover latch and ratchet latch locking the knob cover and ratchet, and the button housing latch and ratchet latch locking the housing and ratchet, ensuring a secure connection and normal operation of all components, thus improving product stability and reliability.

[0072] Expanding Applicability: The modular base design adapts to skin defects of different sizes, broadening its clinical applicability. The integrated deep traction component enables simultaneous repair of superficial and deep defects, expanding applicable scenarios. This invention features multifaceted design optimizations, enhancing product performance:

[0073] Optimized fixing structure: An independent base is added, and the skin suture fixing hole is placed on it. The suture is directly anchored to the skin. At the same time, the base buckle and the outer shell buckle form a buckle pair, doubly fixing the spool, preventing axial displacement and improving fixing stability.

[0074] Upgraded operating components: The inner teeth of the knob cover mesh with the outer teeth of the spool to form a gear transmission pair, which, together with the ratchet spring and ratchet slot, forms a one-way ratchet structure. Pressing down the knob cover retracts the cable, and lifting it releases the cable, achieving "one-click tightening / releasing," making operation convenient and suitable for emergency scenarios.

[0075] Enhanced safety design: It adopts a split threading hole design, with two inlet holes and two outlet holes on both sides of the spool to avoid the threading path crossing and reduce the wear of the rope. It is equipped with a natural rubber protective cap to prevent secondary skin injury.

[0076] Enhanced structural stability: The design incorporates multiple anti-disengagement mechanisms, including a button cover latch and a ratchet latch to lock the knob cover and ratchet, and a button housing latch and a ratchet latch to lock the housing and ratchet, preventing components from disengaging and ensuring a secure connection and normal operation of all parts.

[0077] Expanding the scope of application: The modular base design adapts to skin defects of different sizes, expanding the scope of clinical application. Specific implementation examples:

[0079] Take skin defect repair surgery as an example:

[0080] 1. Installation phase:

[0081] The base 10 is sewn and fixed to the edge of the skin, and the spool 30 is assembled and locked to the base buckle 11 by the outer shell buckle 21.

[0082] 2. Threading operation:

[0083] The pull wire is introduced through the inlet hole 31 and led out through the outlet hole 33; the other end of the wire is inserted through the inlet hole 32 and exited through the outlet hole 34.

[0084] The core of the pull wire is made of steel wire and wrapped with flexible plastic, which balances strength and biocompatibility.

[0085] 3. Closure regulation:

[0086] Rotating the knob cover 50 drives the spool to take in the wire, and the ratchet mechanism locks the tension in real time; when release is needed, lifting the knob cover will automatically reset the spool.

[0087] 4. Demolition Phase:

[0088] Release the latching mechanism, then remove the spool and base in sequence to complete the procedure.

[0089] This invention features a modular base design that can be adapted to skin defects of different sizes, thus expanding its clinical applicability.

[0090] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel traction device for skin and subcutaneous soft tissue defects, characterized in that, Include: The components include a base (10), a housing (20), a spool (30), a ratchet assembly (40), and a knob cover (50). The outer shell (20) is engaged with the base buckle (11) to fix the spool (30), and the spool (30) is adapted for multi-line operation through the double inlet holes (31, 32) and the double outlet holes (33, 34).

2. The novel traction device for skin and subcutaneous soft tissue defects according to claim 1, characterized in that, The inner teeth (A) of the knob cover (50) mesh with the outer teeth (B) of the spool to form a gear transmission pair, and the ratchet locking is achieved by the ratchet spring (43) and the ratchet slot (41). When the knob cover (50) is raised, the ratchet mechanism fails to release the line. When it is pressed down, the ratchet spring (43) is compressed, and the spool (30) rotates synchronously with the knob to take in the line.

3. The traction device according to claim 1, characterized in that: The spool (30) has two inlet holes (31, 32) and two outlet holes (33, 34) on both sides of the spool, and the spool (30) is double-fixed by the outer shell buckle (21) and the base buckle (11) to prevent the spool (30) from axial displacement.

4. The traction device according to claim 1, characterized in that: The knob cover (50) is locked to the ratchet assembly (40) by the button cover buckle (53), and the outer shell (20) is locked to the ratchet assembly (40) by the button outer shell buckle (23), forming a multi-layer anti-detachment structure to ensure that the components are firmly connected during use and will not be disconnected or fall off.

5. The traction device according to claim 1, characterized in that: The base (10) is provided with skin suture fixing holes for fixing the traction device to the skin.

6. The traction device according to claim 5, characterized in that: The core of the puller is steel wire and the outer sheath is made of flexible plastic. The diameter of the inlet hole (31, 32) and outlet hole (33, 34) of the spool (30) is larger than the diameter of the puller. The inlet hole (31, 32) and outlet hole (33, 34) are designed separately to avoid the crossing of the threading path and reduce the wear of the rope.

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