Flap type tailstock for medical telescopic cutter

Abstract

The utility model discloses a petal type tailstock for a medical telescopic cutter. The tailstock is composed of a tail part, two opposite petal-shaped elastic arms and a pre-pressing rubber block clamped between the two petal-shaped elastic arms. The outer surface of the tail portion is provided with a long-strip-shaped protruding block in the axial direction in a protruding mode, the long-strip-shaped protruding block is used for effectively limiting the tail portion in the radial direction, and therefore radial displacement of the assembly is prevented from being reduced in the stretching or rotating process of the cutter. The tailstock is mainly applied to surgical operating instruments, and aims to solve the problems of insufficient radial limiting and sliding blockage of a traditional drum spring structure in the cutter stretching and retracting process, so that the accuracy and safety of surgical operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a petal type tail seat for a medical telescopic cutter, and more particularly to a new tail seat design capable of improving the telescopic stability of the cutter, preventing rotation and improving sliding smoothness. BACKGROUND

[0002] In the existing medical telescopic cutter technology, the telescopic function of the cutter is generally realized by configuring a traditional drum spring at the tail end of the movable section, and the drum spring and the inner wall of the sliding groove are used to maintain the fixation and stability of the cutter during the sliding process through the friction therebetween. This method meets the basic operation requirements to a certain extent, but has the following shortcomings: first, there is a lack of effective radial limiting mechanism, and the cutter often rotates during use, which affects the operation accuracy and causes safety hazards in surgery; second, the drum spring often jams during sliding, which makes the telescopic operation of the cutter not smooth, reduces the operation efficiency and affects the surgical effect.

[0003] The root cause of the above-mentioned shortcomings lies in the limitations of the traditional drum spring design. Although the friction between the drum spring and the inner wall of the sliding groove can realize the fixation of the cutter, such fixation method has defects in stability and accuracy. In addition, the uneven distribution of friction caused by the material and structural layout of the drum spring further leads to the jamming phenomenon, which restricts the function of the medical telescopic cutter and puts forward higher requirements in clinical application.

[0004] Based on the above problems, it is of great significance to develop a new type of petal type tail seat for medical telescopic cutter in terms of clinical use and operation reliability. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to at least overcome one of the shortcomings of the prior art, and to provide a petal type tail seat for a medical telescopic cutter, which is mainly applied to surgical instruments, and aims to solve the problems of insufficient radial limiting and sliding jamming of the traditional drum spring structure during the telescopic operation of the cutter, thereby improving the accuracy and safety of surgical operation.

[0006] To achieve the above-mentioned purpose, the present application discloses a petal type tail seat for a medical telescopic cutter, which is composed of a tail part, two oppositely arranged petal-shaped elastic arms and a pre-pressed rubber block clamped between the two petal-shaped elastic arms.

[0007] The outer surface of the tail part is provided with a long strip-shaped protrusion in the axial direction, which is used for effective limiting of the tail part in the radial direction, so as to prevent the radial displacement of the components during the telescopic or rotational operation of the cutter.

[0008] After the two petal-shaped elastic arms are connected with the tail part, a groove is formed in the opposite area thereof,

[0009] The pre-press rubber block is axially constrained inside the slot, and provides auxiliary support and buffering for the cutter through elastic action, ensuring a stable stress state during medical operation, and also dispersing the impact load of the cutter during reciprocating extension and retraction or rotation.

[0010] A hemispherical protrusion is arranged at the end region of the petal-shaped elastic arm, and the hemispherical protrusion reduces stress concentration through curved surface cooperation;

[0011] An abrasion-resistant plastic layer is arranged on the outer edge surface of the hemispherical protrusion, for providing smooth contact and reducing friction during repeated extension and retraction. The abrasion-resistant plastic layer has a low friction coefficient and excellent fatigue resistance, avoiding excessive wear and noise caused by direct friction between metals.

[0012] Through the above structural design, the pre-press rubber block and the petal-shaped elastic arm can continuously provide stable and smooth support for the operator during the extension and retraction of the cutter. The positioning effect of the long strip-shaped protrusion on the tail outer surface in the radial direction helps to simplify assembly and reduce operation risk. In summary, the present application can better meet the needs of medical retractable cutters.

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

[0014] The specific embodiments will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which the positions, sizes, ranges, etc. of the structures shown in the drawings are sometimes not representative of actual positions, sizes, ranges, etc. In the drawings:

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

[0016] 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.

[0017] It should be understood that like drawing reference numerals in all figures indicate like elements. In the figures, the dimensions of some features can be exaggerated for clarity.

[0018] It is to be understood that the phraseology and terminology used herein is for the purpose of description and not of limitation. All technical and scientific terms used herein are to the same effect as those commonly understood to one of ordinary skill in the art unless otherwise defined. For the sake of clarity, technical, methodological and apparatus descriptions known to those of ordinary skill in the relevant art(s) can not be discussed in detail herein, but should be considered part of the specification.

[0019] As used in the specification, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. As used in the specification and in the claims, the term "comprising" and its derivatives, including "comprises" and "comprised of," means "including but not limited to." As used in the specification and in the claims, the term "and / or" means one or the other or both.

[0020] To further clarify the specific implementation of the flapper tail seat for medical retractable knives and its specific implementation during assembly and use, the specific structure, connection and cooperation relationship between components, and the action principle are described in detail below. Commonly known or recognized common techniques and conventional methods known to those skilled in the art are not described in detail. Embodiments

[0021] Referring to the drawings Figure 1 In the structure, the tail 1 is integrally formed with the knife handle and extends out two flapper-shaped elastic arms 2 in the axial direction of the knife. The outer surface of the tail 1 is provided with a long strip-shaped protrusion 3 in the axial direction, which is used to limit the radial position of the knife during the reciprocating extension and retraction of the knife. The long strip-shaped protrusion 3 is designed according to the shape of the outer diameter of the knife and the matching component, so that the knife can be stable during force or rotation, and unwanted lateral deflection can be avoided.

[0022] The tail 1 can be made of stainless steel or medical-grade alloy material with excellent fatigue resistance and corrosion resistance to meet the disinfection and repeated operation requirements of the clinical use environment. Those skilled in the art can manufacture or subsequently process the tail and protrusion based on conventional metal processing and surface treatment processes, so the related preparation methods, equipment and operation steps are known and will not be disclosed in detail.

[0023] The two flapper-shaped elastic arms 2 are in an integral and continuous structure with the above-mentioned tail 1, which is mainly based on integral casting or stamping forming. In specific design, the width, thickness and deformation region of the flapper-shaped elastic arm 2 can be reasonably selected according to the required axial force and springback requirements of the knife.

[0024] A semispherical protrusion 4 is designed on the outer surface of the end region of the petal-shaped elastic arm 2, and a wear-resistant plastic layer 5 is applied to the surface of the semispherical protrusion 4. To ensure the firm adhesion of the wear-resistant plastic layer 5 to the metal base, common bonding processes or injection molding processes in the field can be used, such as reserving small grooves or anchor points on the metal protrusion to ensure that the plastic layer does not fall off or crack during high-frequency repeated stretching and contraction. Such bonding techniques and plastic selection belong to existing mature solutions and will not be described here.

[0025] The two petal-shaped elastic arms 2 are arranged oppositely and enclose a slot 6 extending in the axial direction on the inner side, which is used to clamp the pre-compressed rubber block 7. The pre-compressed rubber block 7 can be pre-set in hardness and pre-tightening amount according to different tool requirements before assembly. During assembly, the pre-compressed rubber block 7 is pre-pressed by the elastic arms from both sides and is constrained in the radial direction by the slot, thereby realizing the damping and buffering function during the stretching and rotating of the tool. When the tool is subjected to external force, the petal-shaped elastic arm 2 elastically deforms, and part of the force is dispersed by extruding the pre-compressed rubber block 7, which not only ensures that the tool maintains the specified position, but also reduces the vibration of the tool handle or the machine body, thereby improving the stability and safety of the operation. The pre-compressed rubber block 7 can be made of medical-grade biocompatible silicone rubber, polyurethane or other elastomer materials, and its temperature resistance and chemical corrosion resistance can be determined according to the clinical operation environment. The selection of such materials and the conventional processes such as injection molding or die molding are also familiar to those skilled in the art.

[0026] In actual use, the surgeon or medical staff applies push-pull or rotating operation to the telescopic tool by cooperating with the handle or sleeve. Firstly, due to the mutual embedding of the long-shaped protrusion 3 on the outer surface of the tail part 1 and the cooperating part, the tool is effectively limited in the radial direction, avoiding accidental deviation or loosening during use. Secondly, the petal-shaped elastic arm 2 carries the pre-compressed rubber block 7 to disperse stress synchronously during deformation, thereby maintaining the stability and accuracy of the tool action under high-frequency reciprocating or large-amplitude operation. Thirdly, the combination of the end semispherical protrusion 4 and the wear-resistant plastic layer 5 greatly reduces the local wear or jamming of the contact surface by using the arc contact feature, so that the tool still maintains smooth mobility and reliable service life after high-intensity use. This design based on the combination of elasticity, extrusion and limiting is not only suitable for conventional surgical instruments, but also can exhibit good stability in more complex or delicate operation scenarios.

[0027] In a typical comparative test, when the petal-shaped tail base is compared with a conventional medical retractable knife that relies on a simple drum spring structure, it can be observed that when the external force suddenly changes or frequently switches, the petal-shaped tail base can effectively relieve the impact and reduce the noise, and the handle of the knife shows a more stable structural response and a smoother operation feeling. In a clinical environment, through the cooperation of the tail block and the elastic arm, the knife can still maintain reliable positioning under narrow surgical vision or large angle operation. The wear-resistant plastic layer maintains a low wear rate after multiple contacts or rubs, avoiding the decline in the operation precision of the knife and the possible surgical risks.

[0028] The fastening method, mold making, injection molding or bonding process, and material modification means not disclosed in detail here all belong to the known technology or prior art of those skilled in the art, and do not need to be redundantly described in this application. With the above structural design and material selection, the embodiment has fully illustrated how to effectively limit, stably support and buffer the tail of a medical retractable knife to achieve the purpose of optimizing the operation process and prolonging the service life. By moderately adjusting the shape parameters of the elastic arm, the hardness of the pre-pressed rubber block, and the specific thickness or composition ratio of the wear-resistant plastic layer, different surgical instruments or clinical needs can be further adapted. Those skilled in the art can modify or replace the specific structure based on the content of this application, but should not deviate from the technical idea and protection scope disclosed in this application.

[0029] Although exemplary embodiments of the present disclosure have been described, those skilled in the art should 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 the equivalents of these claims are also included.

Claims

1. A collet tailstock for a medical retractable knife, characterized by, The tail base is composed of a tail, two pieces of opposite petals elastic arms and a pre-press rubber block clamped between the two petals elastic arms; The outer surface of the tail is provided with a long strip-shaped protrusion in the axial direction, which is used for effective limiting of the tail in the radial direction, so as to prevent the radial displacement of the assembly during the extension or rotation of the cutter; Two pieces of petals elastic arms form a groove in the opposite area after being connected with the tail; The pre-press rubber block is axially constrained in the groove, which provides auxiliary support and buffer for the cutter through elastic effect, ensures stable stress state during medical operation, and is also used for dispersing the impact load of the cutter during reciprocating extension or rotation; A hemispherical protrusion is arranged at the end area of the petals elastic arm, which reduces stress concentration through curved surface cooperation; The outer edge surface of the hemispherical protrusion is covered with a layer of wear-resistant plastic layer, which provides smooth contact and reduces friction during repeated extension and contraction.

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