Bendable electrocoagulation knife

Abstract

The utility model discloses a bendable electrocoagulation knife, which relates to the field of surgical instruments and comprises a knife handle component, a detachable knife head and a conductive wire. The knife handle assembly is formed by connecting three sections of handle bodies in series through damping hinge mechanisms, the adjacent handle bodies are connected through hinge shafts, elastic pieces are arranged on the peripheries of the hinge shafts, and the elastic pieces enable bending operation to need to apply preset torque. An angle dial is arranged on the outer side of the hinge mechanism. According to the high-frequency electrocoagulation surgical instrument, through structural innovation of the damping hinge mechanism and the modular conductive circuit, the operation flexibility and the electrical safety of the high-frequency electrocoagulation surgical instrument are remarkably improved. The multi-section type damping hinge design provides controllable bending resistance and an angle locking function, and accidental displacement in an operation is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of surgical instruments, in particular to a bendable electrocautery knife. BACKGROUND

[0002] As a core tool for realizing tissue cutting and hemostasis in surgical operations, the traditional structure of high-frequency electrocautery knives usually adopts an integrated design of a fixed handle and a blade. When operating in deep laparoscopic surgery or complex anatomical positions, the operator is often forced to operate the instrument at a non-physiological angle due to the inability of the handle to be bent and adjusted, resulting in difficulties in exposing the surgical field, reducing the operation precision, and possibly causing damage to the surrounding tissues. Although some improved designs attempt to introduce a hinge structure to achieve limited angle adjustment, the hinge part generally lacks damping control mechanism, and is easily caused to deviate from the angle due to the weight of the instrument or accidental touch during operation, affecting the stability during the operation. In addition, the conductive circuit of the existing adjustable-angle electrocautery knife is prone to metal fatigue fracture after repeated bending, resulting in unstable current transmission or even failure during the operation; and if the hinge part is not fully insulated and isolated, high-frequency current may leak through the metal hinge to the non-target tissue, causing safety hazards. The bending angle adjustment of most products relies on the experience estimation of the operator, and lacks visual or tactile feedback positioning marks, further limiting its application value in delicate operations.

[0003] It should be noted that the disclosure of the above background art is only used to assist in understanding the inventive concept and technical solutions of the present application, and the technical problems described are based on the common knowledge in the art and the clinical observation and summary of the applicant, and do not necessarily belong to the prior art before the filing date of the present application. In the absence of solid evidence that the above-mentioned content has been known to the public through publications, public use or other means before the filing date of the present application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. SUMMARY

[0004] The present application aims to at least overcome one deficiency in the prior art, and provides a bendable electrocautery knife.

[0005] To achieve the above-mentioned purpose, the present application discloses a bendable electrocautery knife, which comprises a handle assembly, a detachable blade and a conductive wire. The handle assembly is composed of three handle bodies connected in series through a damping hinge mechanism, and the adjacent handle bodies are connected through a hinge shaft. An elastic member is arranged on the outer periphery of the hinge shaft, and the elastic member requires a predetermined torque to be applied for bending operation. An angle scale is arranged on the outer side of the hinge mechanism.

[0006] The independent conductive circuit is arranged inside the shank assembly, and is composed of a plurality of twisted metal wires, which penetrates the three-section shank body and realizes electrical connection through the axial elastic conductive pin at the hinge.

[0007] The axial elastic conductive pin extends along the shank axis, and the pin body is made of beryllium copper alloy, and the both ends are provided with spherical contact heads, and the pin is coated with a polytetrafluoroethylene insulating sleeve.

[0008] The axial elastic conductive pin is installed in a direction perpendicular to the hinge shaft, and the extension and retraction trajectory of the pin is parallel to the shank axis. This design makes the pin only bear axial compression or tensile stress when the shank is bent, avoiding contact deviation or fatigue fracture caused by lateral shear force. The spherical contact head of the pin forms a self-centering fit with the groove at the end of the conductive circuit, compensating for the positional deviation when the hinge angle changes.

[0009] The elastic conductive pin is coated with an insulating sleeve, and a ceramic insulating isolation ring is arranged between the conductive circuit and the shank, blocking high-frequency current leakage.

[0010] The detachable tool head is fixed to the end shank through a threaded interface, and the tool head working surface is in conductive communication with the conductive circuit.

[0011] The damping hinge mechanism integrates a ratchet positioning assembly. When the shank is bent to the scale identification angle, the ratchet is engaged and locked with the spring buckle, providing tactile feedback and maintaining the angle stability. The ratchet positioning assembly is provided with a reset button, which is pressed to release the ratchet lock, and the shank slowly resets to the initial straight state under the restoring force of the elastic member.

[0012] Compared with the prior art, the application significantly improves the operation flexibility and electrical safety of the high-frequency electrocoagulation surgical instrument through the structural innovation of the damping hinged mechanism and the modular conductive circuit. The multi-section damping hinged design provides controllable bending resistance and angle locking function, avoids accidental displacement during the operation, and the scale mark and backlight illumination ensure the angle adjustment accuracy; the tactile feedback of the ratchet positioning assembly enhances the operation intuition and reduces the visual dependence. The combination of the independent conductive circuit and the elastic conductive pin maintains stable conduction at any bending angle, and cooperates with the ceramic insulation isolation ring to completely eliminate the risk of electric leakage. The slow reset mechanism triggered by the reset button prevents the operation from being out of control due to the rapid rebound of the instrument. The modular blade head and handle design simplifies the maintenance process, and only the corresponding components need to be replaced when local damage occurs, reducing the use cost. The overall scheme optimizes the pure mechanical structure to solve the core pain points of the traditional adjustable angle electrocoagulation knife, such as poor conductive reliability, low operation precision and high maintenance cost, and is suitable for fine operation scenes such as neurosurgery and endoscopic surgery.

[0013] The above-listed benefits are not exhaustive of all advantages. Other potential benefits and detailed technical implementations will be further disclosed in the embodiments or other description parts of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0014] Aspects of the present disclosure will be better understood when read in conjunction with the appended drawings, in which the positions, sizes and ranges of various structures shown in the drawings are sometimes exaggerated for clarity. In the drawings:

[0015] Figure 1 is a structural schematic diagram of an embodiment of the present disclosure.

[0016] Figure 2 is a structural schematic diagram of an embodiment of the present disclosure. DETAILED DESCRIPTION

[0017] The present disclosure will be described below with reference to the accompanying drawings, which show several embodiments of the present disclosure. It should be understood that the present disclosure can be presented in many different ways, and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete, and to fully inform those skilled in the art of the scope of protection of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0018] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, the sizes of some features can be distorted for the sake of clarity.

[0019] It is to be understood that the phraseology or terminology employed herein encompasses the preferred embodiments and variations thereof, and is intended to be interpreted in accordance with the principles of patent law including, but not limited to, 35 U.S.C. § 112(b). Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that the use of

[0020] As used in the specification and the claims, the singular form "a", "an" and "the" include plural references unless the context clearly dictates otherwise. As used in the specification and the claims, the language "including" and / or "containing" shall mean "comprising" and / or "consisting of" and vice versa unless the context

[0021] The accompanying drawings are referred to, in which Figure 1 and 2 The present embodiment relates to a bendable electrocautery knife, which is mainly composed of a handle assembly 1, a detachable head 2 and a conductive wire 3. The handle assembly 1 is designed in three sections, and each section is connected in series by means of a damping hinge mechanism. The adjacent handle bodies are connected through a hinge shaft, and a spring is arranged on the outer periphery of the hinge shaft. The spring requires a predetermined torque to be applied during bending operation to drive the handle bodies to rotate relative to each other. On the outside of the damping hinge mechanism, an angle scale is provided to intuitively display the bending angle of the handle, so as to facilitate the surgeon to accurately control the electrocautery knife. An independent conductive wire is laid inside the handle assembly 1, which is woven by multiple twisted metal wires. The conductive wire penetrates from the first end of the handle to the end handle body, and realizes electrical connection through the axial elastic conductive pin at the hinge. The axial elastic conductive pin extends along the axis direction of the handle body, and the main body is made of beryllium copper alloy material, which has good elasticity and conductivity. Ball contact heads are arranged at both ends of the pin, and the outside is covered with a polytetrafluoroethylene insulating sleeve. When the adjacent handle bodies bend around the hinge shaft, the pin can elastically stretch along the axis direction, so as to ensure that the conductive contact surface always maintains a predetermined pressure, and the stability of current conduction is guaranteed. The installation direction of the axial elastic conductive pin is perpendicular to the hinge shaft, so that the stretching and contraction track of the pin during the bending process of the handle body is parallel to the axis of the handle body. This design can make the pin only bear axial compression or tensile stress when the handle body is bent, effectively avoiding the problems of contact deviation or fatigue fracture caused by lateral shear force. At the same time, the ball contact head of the pin and the groove at the end of the conductive wire form a self-centering cooperation, which can compensate for the positional deviation caused by the change of the hinge angle, and further improve the reliability of the conductive connection. In addition, in order to block the leakage of high-frequency current and ensure safety, a ceramic insulating isolation ring is additionally arranged between the conductive wire and the handle body on the basis of the insulating sleeve covering the elastic conductive pin.

[0022] The detachable tool head 2 is firmly mounted on the terminal handle body via a threaded interface, and its working surface is in conduction with the conductive circuit to conduct high-frequency current during the operation to achieve the function of electrocoagulation hemostasis. The damping hinged mechanism also integrates a ratchet positioning assembly. When the handle body is bent to the angle corresponding to the scale mark, the ratchet can be precisely engaged and locked with the spring buckle, providing clear tactile feedback for the user and ensuring that the tool handle maintains a stable angle state during the operation. The ratchet positioning assembly is equipped with a reset button. Pressing the button can release the ratchet lock. At this time, the handle body can slowly and smoothly reset to the initial straight form under the restoring force of the elastic member, which is convenient for storage and arrangement after the operation. Further, the scale disc surface is clearly marked with multiple positioning marks, and integrates a backlight illumination unit. The backlight illumination unit is powered by a micro power source built-in the tool handle. By pressing the trigger switch on the surface of the handle body, the illumination can be turned on. Even in a dark environment, the visibility of the angle mark can be ensured to meet the operation needs under different light conditions.

[0023] It should be noted that the specific material selection of the conductive wire 3, the circuit design of the power supply, and the specific thread parameters of the threaded interface in the above embodiments are not the innovative points of the present application. The specific implementation of these parts can refer to the existing technology and common sense in the field, and the skilled person in the art can make reasonable selection and setting according to the actual needs and product specifications. Here, it is not repeated.

[0024] In a specific application, for example, a neurosurgical operation, the surgeon operates the electrocautery knife in a narrow surgical space. The detachable blade 2 is first installed at the end of the handle, and is fixed by screwing the threaded interface. At this time, the working surface of the blade is automatically connected to the conductive circuit. Before performing the electrocoautery operation, the surgeon holds different sections of the handle with both hands according to the size of the surgical site and the convenience of operation, and applies appropriate torque to bend the handle to the appropriate angle. At this time, the elastic element deforms, and the axial elastic conductive pin elastically stretches and contracts along the axial direction under the relative rotation of the handle body, ensuring the continuous and stable connection of the conductive circuit. High-frequency current is transmitted to the working surface of the blade through the conductive wire 3 and the conductive circuit, realizing the electrocoagulation function. When the handle is bent to a certain angle on the dial, the ratchet of the ratchet positioning assembly engages with the spring buckle, making a slight "click" sound, reminding the surgeon that the handle angle has been locked, and the bending shape can be stably maintained for fine electrocoagulation operations, such as stopping bleeding of small blood vessels in the brain, to avoid accidental damage to fragile brain tissue caused by handle shaking or angle changes. If the light in the surgical environment is dim, the surgeon only needs to press the trigger switch on the surface of the handle body, and the backlit illumination unit will light up the dial markings, allowing the surgeon to accurately read and adjust the handle angle, ensuring the accuracy of the surgical operation. After the operation is completed, press the reset button to release the ratchet lock, and the handle slowly returns to its original position under the action of the elastic element, facilitating storage and prolonging the service life of the knife. Compared with traditional rigid electrocautery knives, the flexible electrocautery knife of the present embodiment significantly improves flexibility in a narrow space, allowing surgeons to quickly adjust the handle angle according to actual surgical needs, reducing the time spent on frequent replacement and adjustment of surgical instruments, improving surgical efficiency, and providing a powerful guarantee for fine surgery, reducing the risk of surgery, and having significant clinical application advantages.

[0025] In summary, the flexible electrocautery knife of the present embodiment, through the unique design of the handle assembly 1, the layout of the conductive circuit, and the coordinated cooperation of various functional components, not only meets the demand for high-frequency current transmission, but also realizes flexible bending and stable angle retention of the handle, providing an efficient and reliable tool for electrocoagulation in surgical operations, especially in fine operation scenarios.

[0026] Although exemplary embodiments of the present disclosure have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and equivalents of these claims are also included.

Claims

1. A bendable coagulator, characterized by, The electric coagulation knife comprises a handle assembly, a detachable head and a conductive wire, the handle assembly is composed of three handle bodies connected in series through a damping hinge mechanism, adjacent handle bodies are connected through a hinge shaft, the hinge shaft is provided with elastic members on the outer periphery, the elastic members make the bending operation need to exert a predetermined torque, the outer side of the hinge mechanism is provided with an angle scale dial; An independent conductive wire is arranged in the handle assembly, the conductive wire is composed of a plurality of twisted metal wires, and the conductive wire penetrates through the three handle bodies and realizes electrical connection through an axial elastic conductive pin at the hinge; The axial elastic conductive pin extends along the axial direction of the handle body, the pin body is columnar, both ends are provided with spherical contact heads, and the pin is covered with a polytetrafluoroethylene insulating sleeve outside; The installation direction of the axial elastic conductive pin is perpendicular to the hinge shaft, and the extension and retraction movement track of the pin is parallel to the axial line of the handle body; The spherical contact head of the pin and the groove at the end of the conductive wire form self-centering cooperation, and the position deviation when the hinge angle changes is compensated; The elastic conductive pin is covered with an insulating sleeve outside, and a ceramic insulating isolation ring is arranged between the conductive wire and the handle body to block high-frequency current leakage; The detachable head is fixed to the end handle body through a threaded interface, the working surface of the head is in conduction with the conductive wire; The damping hinge mechanism is integrated with a ratchet positioning assembly, when the handle body is bent to the scale identification angle, the ratchet is engaged and locked with the spring buckle; the ratchet positioning assembly is provided with a reset button, after pressing, the ratchet locking is released, and the handle body slowly resets to the initial straight state under the restoring force of the elastic member.

2. A foldable coagulator as defined in claim 1, wherein The surface of the scale dial is marked with multiple positioning marks and integrated with a backlight illumination unit; the backlight illumination unit is powered by the built-in power supply of the handle, the illumination is triggered by pressing the surface of the handle, and the visibility of the angle mark in the dark environment is ensured.

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