Plasma cutter head with tungsten sheet anti-falling mechanism and plasma cutter with tungsten sheet anti-falling mechanism
By setting protrusions on the tungsten sheet and interfering with the grooves of the tool holder, and connecting them with solder joints, the problem of tungsten sheet falling off due to electrode needle detachment is solved, thus improving the safety and stability of the plasma knife.
Patent Information
- Application Number
- CN202423113677.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In existing plasma scalpels, the electrode needles are prone to detachment due to high temperatures, which can cause tungsten sheets to fall into human tissue, posing a safety hazard.
A protrusion is set on the tungsten sheet and a corresponding groove is provided on the tool holder. The connection between the tungsten sheet and the tool holder is enhanced by interference fit, combined with measures such as solder joints and self-tapping screws.
It effectively prevents the tungsten blade from falling off, ensuring surgical safety and enhancing the reliability and stability of the plasma scalpel.
Smart Images
Figure CN223874002U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of medical apparatus and instruments, especially to a plasma knife head with tungsten sheet anti-falling mechanism and plasma knife. BACKGROUND
[0002] In the existing surgical operation, in order to better cut human tissues, doctors usually use plasma knives for surgical operation.
[0003] In the current plasma knife, ceramic blocks and electrode needles are usually arranged. In the working process, the electrode needle is the positive pole, the metal knife rod is the negative pole, the discharge between the positive pole and the negative pole is utilized to make the surrounding gas generate plasma, so as to convert the electric energy into heat energy, and then realize that a small high-temperature jet is sprayed to the surface of human tissues, which can cut and cauterize human tissues at the same time.
[0004] In order to stimulate the generation of plasma, the current plasma knife usually has a tungsten sheet, which is arranged between the electrode needle and the ceramic block. The tungsten sheet and the ceramic block are both provided with through holes, wires are arranged in the through holes, the wires are connected with the electrode needle, and the electrode needle partially shields the through hole. Therefore, when the wire is straightened, the electrode needle realizes the limiting of the tungsten sheet. However, in the process of using the plasma knife, the electrode needle as the positive pole of discharge is easily affected by high temperature, and after long-time use, the electrode needle is easy to fall off. Once the electrode needle falls off in the process of operation, the electrode needle will lose the limiting of the tungsten sheet in the axial direction of the through hole, and the tungsten sheet is easy to fall into the human body. UTILITY MODEL CONTENTS
[0005] In view of the problems existing in the prior art, the utility model aims to provide a plasma knife head and plasma knife with tungsten sheet anti-falling mechanism, which can effectively prevent the tungsten sheet from falling.
[0006] The utility model realizes the purpose by the following technical scheme:
[0007] A plasma knife head with tungsten sheet anti-falling mechanism, comprising a knife rod, wires, ceramic blocks arranged at the end of the knife rod, tungsten sheets arranged close to the ceramic blocks, electrode needles arranged on the side of the tungsten sheets away from the ceramic blocks, the tungsten sheets and the ceramic blocks are both provided with first through holes in communication with each other, the wires pass through the first through holes, the wires are electrically connected with the electrode needles, and the electrode needles at least partially shield the first through holes; the tungsten sheets are provided with protrusions, the protrusions are arranged on the side of the tungsten sheets facing the ceramic blocks, the knife rods are provided with grooves matched with the protrusions, and the protrusions are interference-fitted with the grooves.
[0008] Further, the protrusions are arranged in a ring around the tungsten sheet and along the edge of the tungsten sheet.
[0009] Further, the convex blocks form a convex block ring, and at least two convex block rings are arranged around each other.
[0010] Further, the tip of the convex block is provided with a self-tapping screw.
[0011] Further, the tungsten sheet is connected with the blade rod through a welding spot.
[0012] Further, the welding spot is provided with at least two welding spots, and each welding spot is arranged at the edge of the tungsten sheet and arranged around the tungsten sheet at equal intervals.
[0013] Further, the outer surface of the convex block is a sawtooth surface.
[0014] Further, the tungsten sheet is provided with a plurality of second through holes.
[0015] Further, the electrode needle is provided with at least two electrode needles.
[0016] A plasma knife comprises a handle part and the plasma knife head with the tungsten sheet anti-falling mechanism, and the handle part is connected with the plasma knife head with the tungsten sheet anti-falling mechanism.
[0017] Compared with the prior art, the tungsten sheet and the blade rod are connected with each other through the convex block and the groove, and the tungsten sheet is not easy to fall off once the electrode needle falls off. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a front view of the plasma knife of the utility model;
[0019] Figure 2 is Figure 1 an enlarged schematic view of A part in the figure;
[0020] Figure 3 is Figure 2 a sectional view of B-B plane in the figure;
[0021] Figure 4 is Figure 3 an enlarged schematic view of C part in the figure.
[0022] In the figure:
[0023] 1-blade rod; 2-wire; 3-ceramic block; 4-tungsten sheet; 5-electrode needle; 6-convex block; 7-self-tapping screw; 8-welding spot; 9-second through hole; 10-handle part. DETAILED DESCRIPTION
[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0027] like Figures 1 to 3 As shown, the plasma cutter in the prior art consists of a plasma cutter head and a handle 10 connected to the plasma cutter head. Wherein, as... Figure 3 As shown, the plasma cutting head includes a cutting rod 1, a wire 2, a ceramic block 3 disposed at the end of the cutting rod 1, a tungsten sheet 4 disposed near the ceramic block 3, and an electrode needle 5 disposed on the side of the tungsten sheet 4 away from the ceramic block 3. That is, from top to bottom, the electrode needle 5, the tungsten sheet 4, and the ceramic block 3 are arranged in sequence. Both the tungsten sheet 4 and the ceramic block 3 have interconnected first through holes. The wire 2 passes through each of the first through holes and is electrically connected to the electrode needle 5. The wire 2 is also electrically connected to the control unit located in the handle part 10. The cutting rod 1 is made of metal, so when the electrode needle 5 is energized, the electrode needle 5 acts as the positive electrode, and the cutting rod 1 acts as the negative electrode. Discharge between the positive and negative electrodes generates plasma from the surrounding gas. The ceramic block 3 is used to isolate the positive and negative electrodes, and the tungsten sheet 4 is used to excite plasma generation. In the prior art, the electrode needle 5 at least partially blocks the first through hole, that is, the electrode needle 5 can partially or completely block the first through hole.Figure 3 As shown, the electrode needle 5 prevents the tungsten sheet 4 from moving upward; at the same time, the ceramic block 3 prevents the tungsten sheet 4 from moving downward; the electrode needle 5 and the ceramic block 3 clamp the tungsten sheet 4.
[0028] The improvement of this invention compared to the prior art is that, in the plasma cutting head with the tungsten sheet anti-drop mechanism of this invention, such as... Figure 3 and Figure 4 As shown, a protrusion 6 is provided on the tungsten sheet 4, and the protrusion 6 is located on the side of the tungsten sheet 4 facing the ceramic block 3, that is, the protrusion 6 is located below the tungsten sheet 4. The blade shank 1 is provided with a groove that mates with the protrusion 6, and the opening of the groove is oriented upwards. The protrusion 6 and the groove are in an interference fit. This utility model also discloses a plasma blade, including a handle part 10 and a plasma blade head with a tungsten sheet anti-drop mechanism of this utility model. The plasma blade head with the tungsten sheet anti-drop mechanism is connected to the handle part 10. During the assembly process, the protrusion 6 and the groove of the plasma blade head with the tungsten sheet anti-drop mechanism of this utility model are mated. Because the protrusion 6 and the groove are in an interference fit, the tungsten sheet 4 and the blade shank 1 are connected to each other. Therefore, even if the electrode needle 5 falls off and the electrode needle loses its restraint on the tungsten sheet 4, the tungsten sheet 4 is not easy to fall off.
[0029] In the plasma cutting head and plasma cutter with tungsten sheet anti-drop mechanism of this utility model, many technical features such as the number and position of the bumps 6 have multiple implementations. Below, for each of these technical features, including the position of the bumps 6, one implementation is selected for detailed description, and the embodiment in which this implementation is located is referred to as this embodiment. Other implementations of the bumps 6 and other features are referred to as other embodiments, which are briefly described below.
[0030] In this embodiment, several protrusions 6 are provided, each protrusion 6 forming a ring and arranged along the edge of the tungsten sheet 4. By arranging the protrusions 6 in a ring and correspondingly forming a ring with the groove, this invention provides a larger connection area between the tungsten sheet 4 and the tool holder 1, allowing the protrusions 6 to firmly engage with the groove. In other embodiments, several protrusions 6 may also be provided, each protrusion 6 evenly spaced around the edge of the tungsten sheet 4.
[0031] In this embodiment, the circular protrusions 6 form protrusion rings, and at least two protrusion rings are provided, with each protrusion ring surrounding the other. Specifically, in this embodiment, there are two protrusion rings, and each protrusion ring is concentrically arranged. This utility model, by providing multiple mutually surrounding protrusion rings, makes the connection between the tungsten sheet 4 and the tool holder 1 more stable. In other embodiments, such as... Figure 4 As shown, several protrusions 6 can also be provided, and each protrusion 6 is arranged in a row in a direction toward or away from the handle part 10.
[0032] In this embodiment, asFigure 3 and Figure 4 As shown in FIG. 2 and FIG. 3, the tip of the convex block 6 is provided with a self-tapping screw 7, and the tip of the self-tapping screw 7 is away from the tungsten sheet 4. When the convex block 6 enters the groove, the self-tapping screw 7 is punched into the V-shaped bottom of the groove and enters the cutter bar 1. Through the setting of the self-tapping screw 7, the connection between the tungsten sheet 4 and the cutter bar 1 is further stabilized. In other embodiments, a magnetic block can be provided at the tip of the convex block 6 instead of the self-tapping screw 7.
[0033] In this embodiment, as shown in FIG. 4 and FIG. 5, the tungsten sheet 4 is connected with the cutter bar 1 by a welding spot 8. After the tungsten sheet 4 is connected with the cutter bar 1 when the convex block 6 enters the groove, the tungsten sheet 4 and the cutter bar 1 are then welded to form the welding spot 8. Through the setting of the welding spot 8, the stability of the connection between the tungsten sheet 4 and the cutter bar 1 is further enhanced. In other embodiments, a buckle mechanism can be additionally installed between the tungsten sheet 4 and the cutter bar 1 to enhance the connection between the tungsten sheet 4 and the cutter bar 1. Figure 3 Figure 4 In this embodiment, as shown in FIG. 6 and FIG. 7, the welding spot 8 is at least two, and each welding spot 8 is arranged at the edge of the tungsten sheet 4, and each welding spot 8 is arranged at equal intervals around the tungsten sheet 4. Through the setting of multiple welding spots 8 around the tungsten sheet 4 and the cutter bar 1, the stability of the connection between the tungsten sheet 4 and the cutter bar 1 is further enhanced. In other embodiments, the gap between the tungsten sheet 4 and the cutter bar 1 can be completely welded, and the welding seam is arranged around the tungsten sheet 4.
[0034] In this embodiment, the outer surface of the convex block 6 is a sawtooth surface. Through the setting of the sawtooth surface of the outer surface of the convex block 6, the friction between the convex block 6 and the groove is increased, so that the convex block 6 is not easy to fall out of the groove. In other embodiments, an adhesive layer can also be provided on the outer surface of the convex block 6 to bond the outer surface and the groove. Figure 3 Figure 4 In this embodiment, as shown in FIG. 8, the tungsten sheet 4 is provided with a plurality of second through holes 9. Through the setting of the second through holes 9, the electrode needle 5 is easy to excite plasma. In this embodiment, the cross section of the second through hole 9 is triangular. At the same time, in this embodiment, as shown in FIG. 9, the electrode needle 5 is at least two. Through the setting of multiple electrode needles 5, the discharge power is effectively enhanced.
[0035]
[0036] In this embodiment, as shown in FIG. 10, the tungsten sheet 4 is provided with a plurality of second through holes 9. Through the setting of the second through holes 9, the electrode needle 5 is easy to excite plasma. In this embodiment, the cross section of the second through hole 9 is triangular. At the same time, in this embodiment, as shown in FIG. 11, the electrode needle 5 is at least two. Through the setting of multiple electrode needles 5, the discharge power is effectively enhanced. Figure 2 Figure 2
[0037] In summary, the utility model discloses a tungsten sheet anti -drop mechanism's plasma tool bit and plasma knife, through the interference fit between the lug 6 and the recess, make the mutual connection of tungsten sheet 4 and tool bar 1, even if electrode needle 5 falls off, tungsten sheet 4 is not easy to fall off. And through the setting of the lug 6 around the ring, make the lug 6 can firmly with recess cooperation. And through the setting of multiple mutual encircles the lug ring, make the connection between tungsten sheet 4 and tool bar 1 more stable. And through the setting of self -tapping screw 7, further make the connection between tungsten sheet 4 and tool bar 1 stable. And through the setting of welding spot 8, further strengthen the stability of tungsten sheet 4 and tool bar 1 connection. And through the setting of multiple welding spots 8 in the four around tungsten sheet 4 and tool bar 1, further strengthen the stability of tungsten sheet 4 and tool bar 1 connection. And through the lug 6 outer surface setting into sawtooth surface, make the lug 6 not easy to come out recess. And through the setting of second through -hole 9, make electrode needle 5 easy to excite plasma. And through the setting of multiple electrode needle 5, effectively enhanced the discharge power.
[0038] It needs to emphasize: above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belong to the range of the utility model technical scheme.
Claims
1. A plasma tool bit with tungsten sheet anti-falling mechanism, comprising a tool rod (1), a wire (2), a ceramic block (3) arranged at the end of the tool rod (1), a tungsten sheet (4) arranged close to the ceramic block (3), an electrode needle (5) arranged on the side of the tungsten sheet (4) away from the ceramic block (3), the tungsten sheet (4) and the ceramic block (3) are both provided with first through holes that are in communication with each other, the wire (2) passes through each first through hole, the wire (2) is electrically connected with the electrode needle (5), and the electrode needle (5) at least partially blocks the first through hole, characterized in that, The tungsten sheet (4) is provided with a protrusion (6), which is arranged on the side of the tungsten sheet (4) facing the ceramic block (3), and the cutter bar (1) is provided with a groove matched with the protrusion (6), and the protrusion (6) is in interference fit with the groove.
2. The plasma tip with tungsten chip fall-out prevention mechanism according to claim 1, wherein, The protrusions (6) are arranged in a ring around the tungsten sheet (4).
3. The plasma tip with tungsten chip drop prevention mechanism of claim 2, wherein, The protrusions (6) are arranged in a ring around the tungsten sheet (4).
4. The plasma tip with tungsten chip drop prevention mechanism of claim 1, wherein, The tip of the protrusion (6) is provided with a self-tapping screw (7).
5. The plasma tip with tungsten chip fall-out prevention mechanism of claim 1, wherein, The tungsten sheet (4) and the cutter bar (1) are connected by a welding spot (8).
6. The plasma tip with tungsten chip drop prevention mechanism of claim 5, wherein, The welding spot (8) is arranged on the edge of the tungsten sheet (4), and each welding spot (8) is arranged at equal intervals around the tungsten sheet (4).
7. The plunge resistant tungsten blade tip of claim 1, wherein, The outer surface of the protrusion (6) is a sawtooth surface.
8. The plunge resistant tungsten blade tip of claim 1, wherein, The tungsten sheet (4) is provided with a plurality of second through holes (9).
9. The plunge resistant tungsten tip of claim 1, wherein, The electrode needle (5) is provided with at least two.
10. A plasma blade, characterized by, The handle (10) is connected with the plasma cutter head provided with the tungsten sheet anti-falling mechanism.