A telescoping plasma surgical electrode

Abstract

The utility model relates to a telescopic plasma operation electrode relates to medical instrument technical field, the plasma operation electrode is by electrode stem subassembly, plastic handle, locking head, locking cover, hand -controlled button switch and cable line subassembly is composed, the electrode stem subassembly is by plasma cutter head, electrode stem, metal pipe and insulating sleeve and is composed, the plasma cutter head is fixedly connected with electrode stem, and the metal pipe of electrode stem subassembly is fixedly assembled in plastic handle, locking head is assembled in plastic handle end portion and is arranged concentrically with plastic handle, the outer ring of locking head is equipped with trapezoidal thread and is fixedly not movable and rotatable, this telescopic plasma operation electrode has telescopic structure, and the telescopic plasma operation electrode can realize the telescopic plasma cutter head telescopic, rotation, stop function needed in clinical operation, and after stopping, locking is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a retractable plasma surgical electrode. Background Technology

[0002] Under current technological conditions, surgeries using plasma surgical electrodes require adjustments to the length of the electrode rod with its working part or the angle of the rotating blade, depending on the surgical needs.

[0003] To achieve the aforementioned objectives, common methods for fixing the electrode rod of surgical electrodes include a drum spring structure (relying on the friction between the drum spring and the "metal tube" in the electrode) and an "O-ring" structure (relying on the friction between the electrode rod and the soft material in the electrode) to limit and fix the electrode rod.

[0004] Current plasma surgical electrodes used in clinical applications consist of an electrode rod assembly, a plastic handle, a hand-operated push-button switch, and a cable assembly.

[0005] 1) The plastic handle contains a soft O-ring inside;

[0006] 2) The electrode rod assembly consists of a plasma cutting head, an electrode rod, a drum spring, a metal tube, and an insulating sleeve;

[0007] 3) The metal tube of the electrode rod assembly is fixedly mounted on the plastic handle; the drum spring is fixedly connected to the electrode rod and slidably mounted in the metal tube; the plasma cutter head is fixedly connected to the electrode rod and extends and rotates with the electrode rod.

[0008] 4) A soft O-ring is fixedly installed in the plastic handle. The electrode rod of the electrode rod assembly passes through the O-ring, and the outer diameter of the electrode rod is appropriately interference-fitted with the inner diameter of the O-ring to provide frictional resistance for the extension, contraction and rotation of the electrode rod.

[0009] Manually pulling the electrode rod causes the drum spring to slide within the metal tube, allowing for length adjustment. Simultaneously, the electrode rod assembly can be manually rotated 360°. During the adjustment process, the electrode rod assembly can stop at any position or rotate within any circumference range.

[0010] In use, the drum spring structure and the O-ring structure are both prone to problems. The change in the elasticity of the drum spring will reduce the friction, and the soft material of the O-ring cannot be precisely controlled in size. Even slight changes in the size of the O-ring and the electrode rod will have a significant impact on the feel and locking reliability. In other words, the aforementioned structures are unreliable in use, which reduces the accuracy of the surgery and may even lead to surgical risks. Utility Model Content

[0011] The technical problem to be solved by this utility model is to overcome the existing defects and provide a retractable plasma surgical electrode with a retractable structure. It can realize the functions of retraction, rotation and stop of the plasma blade required for clinical surgery. After stopping, it locks in a stable and reliable manner, which can effectively solve the problems in the background art.

[0012] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0013] A retractable plasma surgical electrode is provided, comprising an electrode rod assembly, a plastic handle, a locking head, a locking sleeve, a hand-operated button switch, and a cable assembly. The electrode rod assembly comprises a plasma blade, an electrode rod, a metal tube, and an insulating sleeve. The plasma blade is fixedly connected to the electrode rod, and the metal tube of the electrode rod assembly is fixedly mounted on the plastic handle.

[0014] The locking head is assembled on the end of the plastic handle and is concentrically arranged with the plastic handle. The outer ring of the locking head is provided with a trapezoidal thread and is fixed and cannot be moved or rotated.

[0015] The locking sleeve is fitted onto the outside of the locking head, and the locking sleeve is threadedly connected to the trapezoidal thread on the locking head.

[0016] Furthermore, the locking head is provided with a stepped surface, which includes a lower step and an upper step. The size of the lower step is clearance-fitted with the size of the corresponding compression surface on the locking sleeve, and the size of the upper step is interference-fitted with the size of the corresponding compression surface on the locking sleeve. The front end of the locking head is provided with a front expansion joint that is longer than the corresponding surface.

[0017] Furthermore, the locking sleeve has limiting surfaces at both ends, including a rear limiting surface and a front limiting surface. When the locking sleeve is assembled with the locking head, the expansion joint of the locking head is pressed by the locking sleeve, so that the limiting surface of the locking sleeve enters the locking head to complete the assembly. The limiting surface cooperates with the stepped surfaces at both ends of the locking head.

[0018] Furthermore, the rear end of the locking head is provided with a rear expansion joint. The rear expansion joint contracts under pressure, allowing the limiting buckle at the tail end of the locking head to enter the plastic handle. When the limiting buckle enters the plastic handle, the compression state of the rear expansion joint is released, and the tail end limiting buckle forms a limiting engagement with the plastic handle to prevent the locking head from coming off the plastic handle.

[0019] Furthermore, the hand-operated button switch is mounted on the plastic handle and is electrically connected to the plasma cutter head via a cable assembly.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This telescopic plasma surgical electrode has the following advantages: It has a telescopic structure, and its telescopic structure is stable and reliable. It solves the problems of instability of the plasma surgical tip in clinical surgery, which can lead to unexpected tip displacement and rotation, as well as unreliable locking of the telescopic tip rod after length adjustment and unexpected shortening of the tip rod under force. It can realize the telescopic, rotating, and stopping functions of the plasma tip required for clinical surgery, and the locking after stopping is stable and reliable. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a partial structural diagram of the locking head of this utility model;

[0023] Figure 3 This is a partial cross-sectional view of the locking sleeve of this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the locking head and locking set of this utility model.

[0025] In the diagram: 1-Plastic handle, 2-Hand-operated button switch, 3-Locking head, 31-Rear expansion joint, 33-Trapezoidal thread, 34-Lower step, 36-Upper step, 37-Front expansion joint, 4-Locking sleeve, 41-Rear limiting surface, 42-Front limiting surface, 43-Compression surface, 5-Electrode rod assembly, 6-Cable assembly. Detailed Implementation

[0026] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0027] Please see Figure 1-4 This embodiment provides a technical solution: a retractable plasma surgical electrode, which is composed of an electrode rod assembly 5, a plastic handle 1, a locking head 3, a locking sleeve 4, a hand-controlled button switch 2, and a cable assembly 6. The electrode rod assembly 5 is composed of a plasma blade, an electrode rod, a metal tube, and an insulating sleeve. The plasma blade is fixedly connected to the electrode rod, and the metal tube of the electrode rod assembly 5 is fixedly assembled on the plastic handle 1.

[0028] The locking head 3 is mounted on the end of the plastic handle 1 and is concentrically arranged with the plastic handle 1. The outer ring of the locking head 3 is provided with a trapezoidal thread 33 and is fixed and cannot be moved or rotated.

[0029] The locking sleeve 4 is assembled on the outside of the locking head 3. The locking sleeve 4 is threadedly connected to the trapezoidal thread 33 on the locking head 3. When the locking sleeve 4 is manually rotated, the locking sleeve 4 can move back and forth on the locking head 3 along the trapezoidal thread 33. Utilizing the self-locking property of the trapezoidal thread 33, the locking sleeve 4 can maintain its relative position and no longer move after the rotation stops.

[0030] The locking head 3 has a stepped surface, which includes a lower step 34 and an upper step 36. The size of the lower step 34 is clearance-fitted with the size of the corresponding compression surface 43 on the locking sleeve 4, and the size of the upper step 36 is interference-fitted with the size of the corresponding compression surface 43 on the locking sleeve 4. The front end of the locking head 3 has a front expansion joint 37 that is longer than the corresponding surface. When the locking sleeve 4 moves to the interference fit position, it generates a center-pressing force on the locking head 3. The locking head 3 deforms towards the center due to the front expansion joint 37 and hugs the electrode rod towards the center, locking the electrode rod in the required position.

[0031] The locking sleeve 4 has limiting surfaces at both ends, including a rear limiting surface 41 and a front limiting surface 42. When the locking sleeve 4 is assembled with the locking head 3, the expansion joint of the locking head 3 is pressed by the locking sleeve 4, so that the limiting surface of the locking sleeve 4 enters the locking head 3 to complete the assembly. The limiting surface cooperates with the stepped surfaces at both ends of the locking head 3, thereby limiting the axial position movement range of the locking sleeve 4 relative to the locking head 3.

[0032] The rear end of the locking head 3 is provided with a rear expansion joint 31. The rear expansion joint 31 contracts under pressure, allowing the limiting buckle at the tail end of the locking head 3 to enter the plastic handle 1. When the limiting buckle enters the plastic handle 1, the compression state of the rear expansion joint 31 is released, and the tail end limiting buckle and the plastic handle 1 form a limiting engagement to prevent the locking head 3 from coming off the plastic handle 1. At the same time, the limiting protrusion at the top of the locking head 3 engages with the limiting groove on the plastic handle 1, so that the locking head 3 is limited and cannot be rotated.

[0033] The hand-operated button switch 2 is mounted on the plastic handle 1 and is electrically connected to the plasma cutting head via the cable assembly 6. It is used to control the working state of the plasma cutting head. The cable assembly 6 is used to transmit electrical energy and control signals to realize the connection between the plasma surgical electrode and external devices.

[0034] It features a retractable structure that is stable and reliable, solving problems such as instability of the plasma cutting head in clinical surgery, unexpected head displacement and rotation, and unreliable locking of the retractable cutting rod after length adjustment, as well as unexpected shortening of the cutting rod under force. It can realize the functions of plasma cutting head extension, rotation, and stopping required in clinical surgery, and the locking after stopping is stable and reliable.

[0035] It is worth noting that the components disclosed in the above embodiments are all general standard parts or parts known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. For example, a rotary connection can refer to a rotary connection through a bearing.

[0037] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A retractable plasma surgical electrode, characterized in that: The plasma surgical electrode consists of an electrode rod assembly (5), a plastic handle (1), a locking head (3), a locking sleeve (4), a hand-operated button switch (2), and a cable assembly (6). The electrode rod assembly (5) consists of a plasma blade, an electrode rod, a metal tube, and an insulating sleeve. The plasma blade is fixedly connected to the electrode rod, and the metal tube of the electrode rod assembly (5) is fixedly assembled on the plastic handle (1). The locking head (3) is assembled at the end of the plastic handle (1) and is concentric with the plastic handle (1). The outer ring of the locking head (3) is provided with a trapezoidal thread (33) and is fixed and cannot be moved or rotated. The locking sleeve (4) is assembled on the outside of the locking head (3), and the locking sleeve (4) is threadedly connected to the trapezoidal thread (33) on the locking head (3).

2. The retractable plasma surgical electrode according to claim 1, characterized in that: The locking head (3) has a stepped surface, which includes a lower step (34) and an upper step (36). The size of the lower step (34) is clearance-fitted with the size of the corresponding compression surface (43) on the locking sleeve (4), and the size of the upper step (36) is interference-fitted with the size of the corresponding compression surface (43) on the locking sleeve (4). The front end of the locking head (3) has a front expansion joint (37) that is longer than the corresponding surface.

3. A retractable plasma surgical electrode according to claim 1 or 2, characterized in that: The locking sleeve (4) has limiting surfaces at both ends, including a rear limiting surface (41) and a front limiting surface (42). When the locking sleeve (4) is assembled with the locking head (3), the expansion joint of the locking head (3) is pressed by the locking sleeve (4), so that the limiting surface of the locking sleeve (4) enters the locking head (3) to complete the assembly. The limiting surface cooperates with the stepped surfaces at both ends of the locking head (3).

4. The retractable plasma surgical electrode according to claim 1, characterized in that: The rear end of the locking head (3) is provided with a rear expansion joint (31). The rear expansion joint (31) contracts under pressure, so that the limiting buckle at the tail end of the locking head (3) can enter the plastic handle (1). When the limiting buckle enters the plastic handle (1), the rear expansion joint (31) is released from its compressed state, and the tail end limiting buckle forms a limiting engagement with the plastic handle (1) to prevent the locking head (3) from coming off the plastic handle (1).

5. A retractable plasma surgical electrode according to claim 1, characterized in that: The hand-operated button switch (2) is mounted on the plastic handle (1) and is electrically connected to the plasma cutter head via a cable assembly (6).

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