Surgical smoke evacuator

Abstract

Disclosed in the present invention is a surgical smoke evacuator, comprising a shell, in which a sliding channel is provided; a smoke evacuation tube, which is slidably connected to the sliding channel, and part of which is located in the shell, and the other part of which is located outside the shell; an electrode blade, which is arranged on the smoke evacuation tube; a control circuit board, which is arranged on the shell; and a delivery flexible circuit board strip, which extends into the smoke evacuation tube through the sliding channel, and has two ends connected to the control circuit board and the electrode blade, respectively. The beneficial effect of the present invention is that frictional resistance during telescopic adjustment can be effectively reduced.

Description

A surgical smoking knife Technical Field

[0001] The invention relates to a surgical smoking knife, belonging to the technical field of surgical instruments. Background Art

[0002] The surgical smoke scalpel in this embodiment is a high-frequency electrosurgery device, which is an electrosurgical medical device that replaces mechanical scalpels for tissue cutting. The high-frequency electroscalpel generates smoke during surgery and exhausts it through a smoke pipe.

[0003] For example, a patent application with prior art publication number CN108742833A discloses a high-frequency smoking scalpel. Two double-sided PCB boards are built into the cavity of the scalpel. The PCB boards are connected to the electric shock knife and the LED light source through lines. Since the transmission connection line or the transmission connection board configured on the PCB board is not flexible enough and has many contact parts, it is easy to generate large friction resistance when the scalpel is extended and slid, which makes it more laborious for the doctor to adjust the length of the scalpel, which is not conducive to surgical operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a surgical smoke-smoking knife which can effectively reduce the friction resistance during telescopic adjustment.

[0005] The present invention is achieved through the following technical solutions.

[0006] A surgical smoking knife, comprising:

[0007] a shell having a slideway therein;

[0008] A smoking pipe is slidably connected to the slideway, with one portion located inside the shell and the other portion located outside the shell;

[0009] An electrode knife is provided on the smoking pipe;

[0010] A control circuit board is arranged on the housing;

[0011] The flexible conveying circuit strip is passed through a slideway into the interior of the smoking pipe, and its two ends are respectively connected to the control circuit board and the electrode knife.

[0012] As a further improvement of the present invention, the flexible transmission line strip includes an outer tube portion located outside the smoking tube and an inner tube portion located inside the smoking tube. The inner end of the smoking tube located inside the shell is provided with an opening to allow the flexible transmission line strip to pass through.

[0013] As a further improvement of the present invention, a shaping mechanism is provided near the inner end of the smoking pipe, and the shaping mechanism applies pressure to both sides of the flexible conveyor line strip so that the cross-section of the flexible conveyor line strip is arc-shaped, and the curvature of the cross-section of the flexible conveyor line strip gradually decreases along the bidirectional extension direction from the part located at the shaping mechanism.

[0014] As a further improvement of the present invention, the two sides of the inner part of the tube facing toward and facing away from the outer part of the tube are respectively recorded as the first side and the second side, and the shaping mechanism includes a middle shaping arm connected to the inner wall of the smoking tube and two side shaping arms, the end of the middle shaping arm applies pressure to the middle of the first side, and the two side shaping arms apply pressure to both sides of the second side respectively.

[0015] As a further improvement of the present invention, the ends of the middle shaping arm and the side shaping arm are provided with shaping balls that can roll in any direction, and the shaping balls apply pressure to the middle of the first surface or the side of the second surface.

[0016] As a further improvement of the present invention, there are two middle shaping arms, which are spaced apart from each other, and the two side shaping arms are located between the two middle shaping arms.

[0017] As a further improvement of the present invention, the smoking pipe is provided with an LED lampshade at the outer port outside the shell, and the inner part of the pipe includes a main body section, a first branch section and a second branch section connected in parallel to the main body section, the first branch section is connected to the electrode knife, and the second branch section is connected to the LED lampshade.

[0018] As a further improvement of the present invention, the shaping mechanism acts on the main body segment, and the first branch segment and the second branch segment form a bifurcation structure at the parallel connection, so that the first branch segment and the second branch segment are spaced apart from each other.

[0019] As a further improvement of the present invention, the main segment and the first branch segment extend in the same direction, and the second branch segment bends and extends from the bifurcation structure along an extension direction deviating from the first branch segment, and then bends and extends along an extension direction parallel to the first branch segment.

[0020] As a further improvement of the present invention, a guide structure is provided in the smoking pipe for guiding the portion of the second branch segment parallel to the first branch segment.

[0021] Beneficial effects of the present invention:

[0022] The flexible conveyor line strips have the characteristics of being bendable and foldable, so that the flexible conveyor line strips basically do not contact the inner wall of the shell and the inner wall of the smoking tube during the extension path, thereby greatly reducing the friction resistance during the extension and retraction process, allowing the doctor to more easily adjust the knife length according to the needs of the operation, which is conducive to the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein:

[0024] FIG1 is a schematic structural diagram of a surgical smoking knife in this embodiment;

[0025] FIG2 is a schematic diagram of the explosion of the surgical smoking knife in this embodiment;

[0026] FIG3 is a schematic diagram of the step-by-step disassembly of the surgical smoking knife in this embodiment; (a section of the housing 3 is retained in the figure)

[0027] FIG4 is a schematic cross-sectional view of the smoking pipe in this embodiment;

[0028] FIG5 is a schematic diagram of the structure of the control circuit board and the flexible transmission circuit board strip in this embodiment;

[0029] FIG6 is a schematic diagram showing the relationship between the flexible conveyor line slats and the middle shaping support arms and the side shaping support arms in this embodiment;

[0030] FIG7 is a schematic diagram of the outer end structure of the smoking pipe in this embodiment. Implementation Method

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and implementation examples.

[0032] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0033] A surgical smoking knife, as shown in Figures 1-7, comprises an outer shell 1, a housing 2, a smoking pipe 3, an electrode blade 4, a control circuit board 5, and a flexible transmission circuit strip 6. The housing 2 is a hollow structure with a linear slideway 20 formed therein. The slideway 20 has an opening formed at one end of the housing 2. The smoking pipe 3 is slidably connected within the slideway 20, with a portion of the smoking pipe 3 located within the housing 2 and the other portion extending through the opening and located outside the housing 2. The electrode blade 4 is mounted on the smoking pipe 3. The control circuit board 5 is mounted on the housing 2. The flexible transmission circuit strip 6 slideway 20 extends into the interior of the smoking pipe 3, with its ends respectively connected to the control circuit board 5 and the electrode blade 4. The outer shell 1 is connected to the housing 2, forming a complete overall shell structure. A cavity is formed between the housing 2 and the outer shell 1 to accommodate the control circuit board 5. A button 11 is provided on the outer shell 1 for controlling electrocautery or electrocoagulation.

[0034] The surgical smoking knife in this embodiment is a high-frequency electric knife, which is an electrosurgical medical device that replaces mechanical scalpels for tissue cutting. It heats the tissue when the high-frequency and high-voltage current generated by the electrode knife 4 comes into contact with the body, achieving separation and coagulation of the body tissue, thereby achieving the purpose of cutting and hemostasis. Electric cutting is a process in which high-density current causes the cell temperature to rise rapidly to over 100 degrees Celsius, and the pressure of the vaporized liquid in the cell causes the cell membrane to be ruptured. Therefore, precise cutting can be achieved without mechanical force, and a hemostatic effect can be produced while cutting. Electrocoagulation is a relatively slow vaporization of the liquid inside and outside the cell, causing the cell to shrink and coagulate, sealing the blood vessel wall to stop bleeding, and there is no need to sew the blood vessel separately. The high-frequency electric knife will produce smoke during the above-mentioned electrocuting and electrocoagulation process. The smoke is medical waste, and improper handling of medical waste can easily cause cross-infection between doctors and patients. The smoke generated at the surgical site is collected and discharged through the smoking tube 3.

[0035] The surgical smoking knife in this embodiment can be telescopically adjusted because the smoking tube 3 is movably connected to the slide 20, which enables the doctor to adjust the extended length according to actual needs to better complete the surgical operation, allowing the doctor to perform precise cutting during the operation, reduce damage to surrounding tissues, and improve the surgical effect.

[0036] In the prior art, the control circuit board uses a PCB circuit board or a FR circuit board. The transmission connection line or the transmission connection board connected to these two circuit boards has poor bendability, and the friction resistance generated between the inner wall of the shell 2 and the inner wall of the smoking tube 3 is large, which makes it more difficult for the doctor to extend and retract the smoking tube 3, which is not conducive to surgical operations.

[0037] In this embodiment, a flexible transmission circuit strip 6 replaces the conventional transmission connection line. Flexible printed circuit boards (FPCs) are typically made of polyester or polyimide and are bendable and foldable. This flexibility ensures that the flexible transmission circuit strip 6 has virtually no contact with the inner walls of the housing 2 or the smoking tube 3 during its extension path. This significantly reduces frictional resistance during extension and retraction, allowing the surgeon to more easily adjust the blade length according to surgical needs, facilitating surgical procedures. Furthermore, the control circuit board 5 also utilizes a flexible printed circuit board (FPC).

[0038] In this embodiment, the flexible transmission line strip 6 comprises an outer portion 61 located outside the smoking tube 3 and an inner portion 62 located within the smoking tube 3. An opening 31 is provided at the inner end of the smoking tube 3 within the housing 2, allowing the flexible transmission line strip 6 to pass through. Specifically, the flexible transmission line strip 6 first winds around the inner end of the smoking tube 3 within the passageway before extending into the interior of the smoking tube 3. Its routing and overall length accommodate the wide range of expansion and contraction of the smoking tube 3. Alternatively, the port at the inner end of the smoking tube 3 can serve as the opening 31, or a notch can be provided in the wall of the smoking tube 3 to connect to the channel port, with both the port and the notch serving as the opening 31.

[0039] When the smoking tube 3 is in its most contracted state, both the outer tube portion 61 and the inner tube portion 62 are essentially stretched. As the smoking tube 3 is gradually extended, the degree of tension in the flexible conveyor strip 6 gradually decreases, with the outer tube portion 61 in particular becoming relatively loose. Furthermore, when the smoking tube 3 is in its most extended state, the flexible conveyor strip 6, especially the outer tube portion 61, is at its most relaxed state, essentially appearing bent. On the one hand, the relaxed flexible conveyor strip 6 is prone to "looping." Rapidly retracting and sliding the smoking tube 3 inward at this time would pull on the flexible conveyor strip 6, potentially affecting the connection between its two ends. Even if the flexible conveyor line strip 6 does not loop, when the smoking tube 3 contracts rapidly, the expansion recovery speed of the flexible conveyor line strip 6 cannot match the sliding speed of the smoking tube 3, which will cause the inner end of the smoking tube 3 to directly collide with the outer part 61 of the tube, causing damage. It is also possible that the inner end of the smoking tube 3 is stuck on the outer part 61 of the tube, causing the outer part 61 from the end connected to the control circuit board 5 to the stuck position to be over-stretched or even broken.

[0040] To address this technical issue, this embodiment incorporates a shaping mechanism near the inner end of the smoking tube 3. This mechanism applies pressure to both sides of the flexible conveyor strip 6, creating an arcuate cross-section. The curvature of the end face of the flexible conveyor strip 6 gradually decreases along its bidirectional extension from the portion located within the shaping mechanism until its cross-section assumes a straight shape. Because the rigidity of the flexible conveyor strip 6 is proportional to its cross-sectional curvature, the section of the flexible conveyor strip 6 extending bidirectionally, centered at the shaping mechanism, possesses sufficient rigidity to maintain its straightness. First, when the smoking tube 3 is at its maximum extension, only the portion of the outer tube portion 61 near the connection control circuit board 5 is in a relaxed, bent state. This effectively prevents the flexible transmission line strip 6 from "looping," thereby preventing the flexible transmission line strip 6 from being pulled during the rapid retraction and sliding of the smoking tube 3. Second, the outer tube portion 61 of the flexible transmission line strip 6 remains stretched near the inner end of the smoking tube 3, allowing the inner end of the smoking tube 3 to directly impact or become stuck on the outer tube portion 61 during rapid retraction and sliding, thereby preventing the outer tube portion 61 from being broken due to direct impact or getting stuck. Furthermore, the shaping mechanism only strengthens the rigidity of a portion of the flexible transmission line strip 6 and does not affect the normal bending of the flexible transmission line strip 6 during the extension and sliding of the smoking tube 3.

[0041] In this embodiment, the two sides of the inner tube part 62 facing and facing away from the outer tube part 61 are respectively recorded as the first side 6a and the second side 6b. The shaping mechanism includes a middle shaping arm 71 connected to the inner wall of the smoking tube 3 and two side shaping arms 72. The end of the middle shaping arm 71 applies pressure to the middle of the first side 6a, and the two side shaping arms 72 apply pressure to the two sides of the second side 6b respectively. During the telescopic sliding process of the smoking tube 3, the outer tube portion 61 changes its pushing and pulling force on the inner tube portion 62 due to the change in the bending shape and degree. Therefore, in this process, the inner tube portion 62 will undergo a certain displacement relative to the shaping mechanism along the length direction of the smoking tube 3. Therefore, it is necessary to minimize the friction resistance of the shaping mechanism to the inner tube portion 62. In this embodiment, pressure is applied to the middle part of the first surface 6a and the two sides of the second surface 6b by the middle shaping support arm 71 and the two side shaping support arms 72. On the premise of completing the shaping of the inner tube portion 62, the contact area between the shaping mechanism and the inner tube portion 62 can be minimized, thereby minimizing the friction force generated between the two.

[0042] During the telescopic and sliding movement of the smoking pipe 3, the flexible conveyor strip 6 will also deflect along the width of the smoking pipe 3, causing relative displacement between the inner tube portion 62 and the shaping mechanism along the length and width of the smoking pipe 3. This not only generates frictional resistance but also easily causes wear on both surfaces of the flexible conveyor strip 6, namely, the first surface 6a and the second surface 6b. To address this issue, in this embodiment, the ends of the central shaping arm 71 and the side shaping arm 72 are each equipped with a shaping ball 73 that can roll in any direction. The shaping ball 73 applies pressure to the center of the first surface 6a or the side of the second surface 6b. Therefore, when the inner tube portion 62 and the shaping mechanism move relative to each other along the length and width of the smoking pipe 3, the shaping ball 73 rolls in the corresponding direction, minimizing frictional resistance in both directions. This not only facilitates the telescopic and sliding movement of the smoking pipe 3 but also prevents wear on the first and second surfaces 6a, 6b of the flexible conveyor strip 6.

[0043] More specifically, a cavity for accommodating the shaping ball 73 is provided in the middle shaping arm 71 and the side shaping arm 72, and a circular opening connected to the cavity is provided at the end. The diameter of the circular opening is smaller than the diameter of the shaping ball, so that a portion of the shaping ball 73 is exposed and contacts the first surface 6a or the second surface 6b.

[0044] In this embodiment, there are two middle shaping arms 71, which are spaced apart from each other. The two side shaping arms 72 are located between the two middle shaping arms 71, that is, there are only four contact points between the shaping mechanism and the first surface 6a and the second surface 6b of the flexible conveying line strip 6, which not only minimizes the friction resistance, but also extends the length of the rigid section of the flexible conveying line strip 6.

[0045] In this embodiment, the smoking tube 3 is provided with an LED lampshade 8 at the outer end outside the housing 2. The LED lampshade 8 includes a ring body and a plurality of LED light pieces arranged around the ring body. The inner portion 62 of the tube includes a main section 621, a first branch section 622 and a second branch section 623 connected in parallel to the main section 621. The first branch section 622 is connected to the electrode knife 4, and the second branch section 623 is connected to the LED lampshade 8. The surgical smoking knife in this embodiment not only has the functions of electro-cutting and electro-coagulation, but also has an illumination function. The LED lampshade 8 can follow the sliding movement of the smoking tube 3 to illuminate the surgical site, facilitating the doctor's surgical operation.

[0046] In this embodiment, the shaping mechanism acts on the main body section 621, forming a bifurcated structure at the parallel connection between the first and second branch sections 622, 623, thereby spacing the first and second branch sections 622, 623 apart. In addition to enhancing rigidity and allowing relative displacement of the flexible conveyor strip 6 along the length and width of the smoking pipe 3, the shaping mechanism also tightens the inner portion 62 of the pipe, from the junction between the click knife and the LED lampshade 8 to the shaping mechanism, due to frictional forces, thereby preventing the first and second branch sections 622, 623 from becoming entangled with each other.

[0047] In this embodiment, the main body segment 621 and the first branch segment 622 extend in the same direction, the second branch segment 623 is bent and extended from the bifurcation structure along the extension direction deviating from the first branch segment 622, and then bent and extended along the extension direction parallel to the first branch segment 622. The first branch segment 622 and the second branch segment 623 are spaced apart from each other, which can further reduce the occurrence of mutual entanglement between the first branch segment 622 and the second branch segment 623.

[0048] In this embodiment, a guide structure 9 is provided in the smoking tube 3 for guiding the portion of the second branch segment 623 parallel to the first branch segment 622, so that a stable gap is generated between the first branch segment 622 and the second branch segment 623. The guide structure 9 can be configured as a fastener connected to the inner wall of the smoking tube 3, and the fastener is fastened to the second branch segment 623.

[0049] In this embodiment, the smoking tube 3 is provided with a focusing refraction ring 32 on the annular edge of its outer end. The inner surface of the focusing refraction ring 32 is convex. The light emitted by the LED lampshade 8 passes through the focusing refraction ring 32, which has the function of focusing, thereby improving the lighting effect and facilitating surgical operations.

[0050] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A surgical smoke-absorbing knife, characterized in that: include: A housing having a slideway inside; A smoking pipe is slidably connected to the slideway, with one part located inside the shell and the other part located outside the shell; An electrode knife is arranged on the smoking pipe; A control circuit board is arranged on the housing; The flexible conveying circuit board strip is inserted into the interior of the smoking pipe through a slideway, and its two ends are respectively connected to the control circuit board and the electrode knife.

2. The surgical smoking knife according to claim 1, characterized in that: The flexible transmission line strip comprises an outer tube portion located outside the smoking tube and an inner tube portion located inside the smoking tube. An opening is provided at the inner end of the smoking tube located inside the shell to allow the flexible transmission line strip to pass through.

3. The surgical smoking knife according to claim 2, characterized in that: A shaping mechanism is arranged near the inner end of the smoking pipe, and the shaping mechanism applies pressure to both sides of the flexible conveying line strip, so that the cross section of the flexible conveying line strip is arc-shaped, and the cross-sectional curvature of the flexible conveying line strip gradually decreases along the bidirectional extension direction from the part located at the shaping mechanism.

4. The surgical smoke-smoking knife according to claim 3, characterized in that: The two sides of the inner part of the tube facing toward and facing away from the outer part of the tube are respectively recorded as the first side and the second side. The shaping mechanism includes a middle shaping arm and two side shaping arms connected to the inner wall of the smoking tube. The end of the middle shaping arm applies pressure to the middle of the first side, and the two side shaping arms apply pressure to the two sides of the second side respectively.

5. The surgical smoking knife according to claim 4, characterized in that: The ends of the middle shaping support arm and the side shaping support arm are both provided with shaping balls that can roll in any direction, and the shaping balls apply pressure to the middle of the first surface or the side of the second surface.

6. The surgical smoke-sucking knife according to claim 4, characterized in that: The middle shaping support arms are provided with two and are spaced apart from each other, and the two side shaping support arms are located between the two middle shaping support arms.

7. The surgical smoke-absorbing knife according to claim 3, characterized in that: The smoking pipe is provided with an LED lamp cover at the outer port outside the shell, and the inner part of the pipe includes a main body section, a first branch section and a second branch section connected in parallel with the main body section, the first branch section is connected to the electrode knife, and the second branch section is connected to the LED lamp cover.

8. The surgical smoke-sucking knife according to claim 7, characterized in that: The shaping mechanism acts on the main body segment, and the first branch segment and the second branch segment form a bifurcated structure at the parallel connection, so that the first branch segment and the second branch segment are spaced apart from each other.

9. The surgical smoke-smoking knife according to claim 8, characterized in that: The main body segment and the first branch segment extend in the same direction, and the second branch segment bends and extends from the bifurcation structure along an extension direction deviating from the first branch segment, and then bends and extends along an extension direction parallel to the first branch segment.

10. The surgical smoke-sucking knife according to claim 9, characterized in that: A guiding structure is provided in the smoking pipe for guiding the portion of the second branch segment parallel to the first branch segment.

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