Telescopic sliding conduction smoke suction pen

Abstract

The invention relates to the field of medical instruments, in particular to a telescopic sliding conduction smoke suction pen which comprises a shell, an electrode and a control circuit board, a cavity is formed in the shell and comprises an air suction cavity and an installation cavity, and the shell further comprises a suction nozzle; the electrode is a solid or hollow electrode; a conduction pipe and a conductive elastic sheet are arranged in the air suction cavity; the head part of the conductive elastic sheet is connected with the electrode, and the tail part of the conductive elastic sheet is in sliding contact connection with the control circuit board; the control circuit board comprises a top surface circuit and a bottom surface circuit; the problems that smoke cannot be completely sucked in a small-size smoking pen, and negative pressure drops in the smoking pen are solved. The smoke suction amount of the air suction cavity is increased through telescopic sliding of the communication pipe; the pressure drop loss is reduced; the influence of instable impedance caused by an external intermediate conductive sheet is eliminated through the conductive elastic sheet, the stability of the surgical operation is improved, the connection structure of the electrode and the control circuit board is simplified, and the accumulated tolerance is reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly to a retractable sliding conduction smoking pen. Background Art

[0002] High-frequency electrosurgery is a commonly used surgical tool. The high temperature during its operation causes the water and organic matter in cells to instantly vaporize, producing smoke containing cell fragments, aerosols, viruses, bacteria, tar, and volatile organic compounds, referred to as surgical smoke. The treatment of surgical smoke usually involves natural diffusion and negative pressure suction. Natural diffusion relies on the operating room's ventilation system, which not only has low smoke removal efficiency but also obscures the surgical field of view, increasing the risk of surgical operations. Negative pressure suction devices generally have insufficient suction power and require additional personnel to operate the negative pressure tube, occupying surgical space. To compensate for the shortcomings of natural diffusion and negative pressure suction devices, the smoking pen came into being. The smoking pen directly integrates the electrosurgery and negative pressure suction, not only solving the problem of surgical field obstruction, but also directly contacts the smoke source and suctions it, thereby increasing the amount of surgical smoke suctioned.

[0003] However, in today's market, most of the existing detachable electrodes are solid structures made of stainless steel round bars. The solid structure electrodes occupy a large space in the small volume of the smoking pen, thereby compressing the negative pressure suction space; at the same time, the existing smoking pens have too many assembled parts and the structure is complex and protruding, which will also cause a loss of negative pressure drop, resulting in a decrease in the pressure difference in the surgical smoke, a slower smoke suction speed, and affecting the surgical smoke suction effect.

[0004] How to further increase the amount of surgical smoke removed while reducing the pressure drop loss of negative pressure is a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0005] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a retractable sliding conductive smoking pen to solve the problem that surgical smoke cannot be completely absorbed in a small-volume smoking pen, and the length of the electrode affects the pressure drop of negative pressure in the smoking pen.

[0006] The technical solution adopted by the present invention is to provide a retractable sliding conductive smoking pen, including a shell, an electrode and a control circuit board. The shell is tubular and has a cavity inside. The cavity includes an air suction cavity and an installation cavity separated from each other, wherein the shell also includes a suction nozzle, the suction nozzle is fixed to the front end of the cavity, and the electrode protrudes from the suction nozzle; a conductive tube and a conductive spring are provided in the air suction cavity, the suction nozzle is fixed to the front end of the conductive tube, the electrode is provided in the conductive tube, and the conductive tube drives the electrode to slide and retract relative to the shell; the conductive spring The head is connected to the electrode, and the tail of the conductive spring forms a sliding contact connection with the control circuit board; the control circuit board is arranged in the installation cavity, and the control circuit board includes a top circuit and a bottom circuit, the top circuit is used to trigger the circuit on and off of the electrode, and the bottom circuit is used to maintain continuous contact with the conductive spring; the conductive tube is provided with a plurality of spirally arranged guide bars, and the plurality of guide bars are evenly spaced along the circumferential direction of the longitudinal section of the conductive tube, and each of the guide bars spirally penetrates the inner wall surface of the conductive tube, and the rotation direction of each guide bar is the same.

[0007] The surgical smoke generated by the electrode is guided into the suction chamber through the suction nozzle; the electrode is extended and slid relative to the shell through the conducting tube, which, on the one hand, extends the usable length of the electrode and extends the conducting tube outside the electrode, thereby increasing the contact area between the suction chamber and the smoke source and expanding the smoke removal capacity; on the other hand, the extension of the conducting tube allows the smoke source generated by the electrode to be quickly sucked into the suction chamber, reducing the pressure drop loss. Under a smaller pressure drop loss, the suction chamber can generate a greater pressure difference for the smoke, thereby accelerating the smoke inhalation speed, thereby achieving a more efficient smoke suction effect and significantly reducing the phenomenon of smoke leakage; the conductive spring is connected between the electrode and the control circuit board, which simplifies the suction process. The connection structure inside the pen improves assembly efficiency, reduces cumulative tolerance, and ensures that the electrode always maintains contact with the control circuit board even if it floats up and down during the sliding process, ensuring stable contact between the electrode and the conductive spring, and eliminating the need for an external intermediate conductive sheet to cause impedance instability, thereby increasing the stability of the surgical operation; by controlling the double-sided circuit of the circuit board, the space occupied by the mounting cavity is small, which facilitates reducing the volume of the mounting cavity in the shell, thereby increasing the volume of the suction cavity in the shell, so that the suction cavity has enough space to absorb more smoke; the guide strip spirally runs through the conduction tube to keep the flow state of the smoke stable, while reducing the heat of the smoke when it is extracted.

[0008] Furthermore, the electrode is a hollow electrode, comprising a hollow capillary tube and a cutter head, wherein the tail of the cutter head protrudes from the head of the hollow capillary tube, and the two are smoothly transitionally connected.

[0009] By replacing the traditional solid electrode with a hollow capillary in the hollow electrode, the smoke source is drawn into the suction chamber along the hollow capillary, further increasing the smoke suction capacity of the suction chamber; by replacing the traditional solid electrode with a cutter head in the hollow electrode, the smoke source is sucked away at the moment of contact with the cutter head, thereby increasing the smoke suction rate of the cutter head; by the smooth transition connection between the cutter head and the hollow capillary, the pressure drop loss of the smoke during flow is further reduced, thereby further improving the smoke suction efficiency.

[0010] Furthermore, the thickness of the cutter head is h, the diameter of the hollow tube is D, the value range of h is 0.5mm~1.5mm, and the value range of h / D is 1 / 10~1 / 5; the chord length of the arc opening formed by the cutter head in the cross-sectional direction is d, and the value range of d / D is 0.6~0.95.

[0011] The suction efficiency of the hollow electrode is further improved by specifying the size of the blade head and the ratio between the blade head and the hollow capillary.

[0012] Furthermore, the length of the blade head is L, 8mm≤L≤20mm.

[0013] Through the specific length of the blade, the distance between the blade and the smoke source is precisely controlled within a specific value, which greatly reduces the pressure drop loss of the negative pressure in the suction chamber and further improves the smoke suction efficiency.

[0014] Furthermore, a connecting seat is provided in the conducting tube, and a convex strip is provided on the inner wall of the conducting tube, and the bottom of the connecting seat is clamped with the convex strip; the connecting seat includes a fixed ring and a movable ring that are independent of each other, and the hollow electrode also includes an insulating sleeve, which is sleeved on the outside of the middle part of the hollow tube and is jointly connected to the fixed ring, and the tail of the hollow tube is connected to the movable ring.

[0015] The bottom of the connecting seat is clamped with the convex strip, so that the hollow electrode is fixedly connected in the fixed ring and the movable ring of the conducting tube at the same time; the movable ring is used to compensate for the small range of displacement floating between the hollow electrode and the conductive spring, so that the connection between the two can be adjusted.

[0016] Furthermore, the conductive spring clip includes a connecting portion, an upturned portion and a folding portion connected in sequence, the folding portion is located above the connecting portion and the upturned portion, the connecting portion includes an annular component and an arched component, the annular component is embedded between the tail of the hollow tube and the movable ring, and the arched component is located between the annular component and the upturned portion; the upturned portion includes multiple connecting segments with different slopes; the folding portion includes a limiting component and an abutting component, the abutting component abuts against the bottom surface of the control circuit board, and the limiting component is inserted into the tail of the conductive tube.

[0017] The hollow electrode is surrounded by the annular component in the connecting part to form a stable connection, and the elasticity of the connecting part is enhanced by the arched component in the connecting part; the height difference between the hollow electrode and the control circuit board is compensated by the upturned part; the abutment component in the folding part is in direct contact with the bottom circuit of the control circuit board, and the limiting component in the folding part limits the extreme position of the abutment component in the bottom circuit.

[0018] Furthermore, the connecting segment in the upward-curved portion connected to the connecting portion is the first segment, the connecting segment in the upward-curved portion connected to the folded portion is the third segment, the connecting segment connected between the first segment and the third segment is the second segment, the first segment and the second segment are straight line segments, and the slopes correspond to k1 and k2 respectively, k1>k2, and the third segment is an arc segment.

[0019] The elasticity of the upward-curving portion is increased by the different slopes of the connecting sections, while the folded portion is kept in constant contact with the control circuit board.

[0020] Furthermore, the tail of the conducting tube is provided with an open groove, an abutment column and a through-hole, the connection between the folded portion and the upturned portion is clamped in the open groove, the abutment column is provided below the abutment component, and the limiting component passes through the through-hole and can float in the through-hole.

[0021] The opening groove is used to limit the connection between the folded part and the upward part to remain flush with the conductive tube, thereby preventing the upward part from causing the abutment column to excessively abut against the bottom circuit; the abutment column is used to limit the maximum distance between the abutment component and the control circuit board, thereby preventing the abutment column from being too far away from the bottom circuit and unable to maintain contact; the perforation is used to allow the limiting component to float therein, thereby preventing the conductive spring from floating during the sliding process, causing squeezing of the abutment column, and causing the abutment component and the abutment column to be stuck.

[0022] Furthermore, the suction nozzle is provided with side openings, and the side openings are evenly distributed around the outer side surface of the suction nozzle close to the blade head side; the number of the side openings is the same as the number of the guide strips.

[0023] The smoke leaking from the hollow electrode is guided and sucked away by the side openings distributed around one side of the cutter head, and the smoke suction speed in the suction chamber is accelerated by the guide strips, thereby improving the suction efficiency of the suction chamber; the number of side openings is the same as the number of guide strips, so that the smoke continues to move coherently toward the front guide strip after being sucked into the side openings, thereby avoiding the formation of turbulence in the smoke between the side openings and the guide strips.

[0024] Furthermore, it also includes an external pipe, which is connected to the tail of the suction cavity, and the wires connected to the control circuit board are distributed in the external pipe.

[0025] The external tube is closedly connected to the shell, so that the negative pressure device connected to the external tube remains sealed in the shell; the distribution of specific tube bundles in the external tube is directly connected to the external tube through the wires from the installation cavity, which reduces the influence of the wires on the negative pressure drop in the external tube, thereby increasing the negative pressure in the suction cavity and further enhancing the smoke suction effect.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the electrode is telescopically slid relative to the shell through the conducting tube, which not only extends the use length of the electrode, but also extends the conducting tube outside the electrode to increase the contact area between the suction chamber and the smoke source, and expands the smoke suction capacity; the smoke source generated by the electrode is quickly sucked into the suction chamber, reducing the pressure drop loss, increasing the pressure difference in the suction chamber, and achieving a more efficient smoke suction effect; the conductive spring is used to ensure that the electrode maintains stable contact with the control circuit board during sliding and floating, and eliminates the need for an external intermediate conductive sheet to cause impedance instability, thereby increasing the stability of the surgical operation, simplifying the connection structure between the electrode and the control circuit board, improving assembly efficiency, and reducing cumulative tolerances; the double-sided circuit of the control circuit board makes it occupy a small space in the installation cavity, which is convenient for reducing the volume of the installation cavity in the shell, increasing the volume of the suction chamber in the shell, and expanding the smoke suction capacity of the suction chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall structural diagram of the present invention.

[0028] Figure 2 Schematic diagram of the internal connection of the shell of the present invention.

[0029] Figure 3 Schematic diagram of the internal connection of the conducting tube of the present invention.

[0030] Figure 4 Schematic diagram of the suction nozzle of the present invention.

[0031] Figure 5 Schematic diagram of the hollow electrode of the present invention.

[0032] Figure 6 This is a schematic diagram of the bottom surface of the control circuit board of the present invention.

[0033] Figure 7 It is a top view schematic diagram of the control circuit board of the present invention.

[0034] Figure 8 Schematic diagram of the conducting tube of the present invention.

[0035] Figure 9 It is a cross-sectional schematic diagram of the guide strip of the present invention on the conducting pipe.

[0036] Figure 10 This is a cross-sectional view of the guide strip of the present invention on the conducting pipe.

[0037] Figure 11 Schematic diagram of the connecting seat of the present invention.

[0038] Figure 12 Schematic diagram of the conductive spring of the present invention.

[0039] Figure 13 It is a partially enlarged schematic diagram of the connection portion of the present invention.

[0040] Figure 14 It is a partially enlarged schematic diagram of the upward-warping portion of the present invention.

[0041] Figure 15 It is a partially enlarged schematic diagram of the folding portion of the present invention.

[0042] Description of the accompanying drawings: shell 100, suction nozzle 110, side opening 111, conducting tube 120, connecting seat 121, fixing ring 1211, movable ring 1212, guide bar 122, conductive spring 130, connecting part 131, annular part 1311, arched part 1312, upward part 132, first segment 1321, second segment 1322, third segment 1323, folding part 133, limiting part 1331, abutting part 1332, electrode 200, blade head 210, hollow tube 220, insulating sleeve 230, control circuit board 300, top circuit 310, bottom circuit 320, external tube 400. DETAILED DESCRIPTION

[0043] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting the present invention. To better illustrate the following embodiments, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will appreciate that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0044] Example

[0045] like Figure 1-15As shown, this embodiment provides a retractable sliding conductive smoking pen, including a shell 100, an electrode 200 and a control circuit board 300. The shell 100 is tubular and has a cavity inside. The cavity includes an air suction cavity and an installation cavity separated from each other, wherein the shell 100 also includes a suction nozzle 110, the suction nozzle 110 is fixed to the front end of the cavity, and the electrode 200 protrudes from the suction nozzle 110; a conductive tube 120 and a conductive spring 130 are provided in the air suction cavity, the suction nozzle 110 is fixed to the front end of the conductive tube 120, the electrode 200 is provided in the conductive tube 120, and the conductive tube 120 drives the electrode 200 to slide and retract relative to the shell 100; the front end of the conductive spring 130 The top of the conductive spring 130 is connected to the electrode 200, and the tail of the conductive spring 130 forms a sliding contact connection with the control circuit board 300; the control circuit board 300 is arranged in the installation cavity, and the control circuit board 300 includes a top circuit 310 and a bottom circuit 320, the top circuit 310 is used to trigger the circuit on and off of the electrode 200, and the bottom circuit 320 is used to maintain continuous contact with the conductive spring 130; the conductive tube 120 is provided with a plurality of spirally arranged guide bars 122, and the plurality of guide bars 122 are evenly spaced along the circumferential direction of the longitudinal section of the conductive tube 120. Each of the guide bars 122 spirally penetrates the inner wall surface of the conductive tube 120, and each of the guide bars 122 has the same rotation direction.

[0046] In this embodiment, the housing 100 is tubular, making it easier for medical personnel to grasp. The suction cavity is located at the belly of the housing 100, and the installation cavity is located at the back of the housing 100. A control circuit board 300 is provided in the installation cavity, and a button is provided at the back of the housing 100. When the medical personnel presses the button, the contact between the top surface circuit 310 of the control circuit board 300 and the button is triggered, thereby controlling the on or off of the top surface circuit 310. The rear end of the suction nozzle 110 is fixedly engaged with the front end of the conductive tube 120. The diameter of the suction nozzle 110 gradually increases from front to back. The front end diameter of the suction nozzle 110 is smaller than the diameter of the conductive tube 120, and the diameter of the conductive tube 120 is smaller than the rear end diameter of the suction nozzle 110. The front and rear ends of the conducting tube 120 have the same diameter. A slide rail runs through the bottom of the conducting tube 120, and a protrusion on the inner wall of the housing 100 mates with the slide rail, allowing the conducting tube 120 to fully extend outward from the housing 100 or fully retract into the housing 100. As the conducting tube 120 slides and retracts relative to the housing 100, the electrode 200 affixed to the conducting tube 120 is pulled back and forth, driving the conductive spring 130 affixed to the rear end of the electrode 200 to move back and forth. The bottom circuit 320 on the control circuit board 300 ensures that the conductive spring 130 maintains contact with the electrode 200 during its forward and backward movement. The guide strips 122 are arranged on the inner wall surface of the conducting tube 120 and are distributed in a spiral shape, so that the distribution position of the guide strips 122 on the circumferential surface where the longitudinal section of the conducting tube is located changes with the length of the conducting tube 120, thereby guiding the position of the smoke on the guide strips 122 relative to the conducting tube 120 in each time period to change from the position of the smoke on the guide strips 122 relative to the conducting tube 120 in the previous time period, so that the smoke can not only form a stable turbulent flow in a negative pressure, but also reduce heat.

[0047] The electrode 200 is a hollow electrode, comprising a hollow tube 220 and a cutter head 210 . The tail of the cutter head 210 protrudes from the head of the hollow tube 220 , and the two are smoothly connected.

[0048] In this embodiment, the electrode 200 can be installed as a conventional solid electrode or a hollow electrode. In this embodiment, the electrode 200, as a hollow electrode, significantly increases the area of ​​the smoke inlet, effectively increasing the smoke inhalation flow rate. The hollow tube 220 is made of stainless steel, and the blade head 210 is processed from the stainless steel hollow tube 220 into a flat blade shape. A smooth transition is maintained between the tail of the blade head 210 and the hollow tube 220 to prevent the smoke from being disturbed by the protrusion at the connection between the two when it is inhaled through the hollow electrode, thereby affecting the smoke removal efficiency.

[0049] The thickness of the cutting head 210 is h, the diameter of the hollow tube 220 is D, the value range of h is 0.5mm~1.5mm, and the value range of h / D is 1 / 10~1 / 3; the chord length of the arc opening formed by the cutting head 210 in the cross-sectional direction is d, and the value range of d / D is 0.6~0.95.

[0050] In this embodiment, the thickness h of the blade head 210 is 0.7 mm, the diameter D of the hollow tube 220 is 2.36 mm, and the chord length d of the arc opening formed by the blade head 210 in the cross-sectional direction is 2 mm. The specific parameters of the blade head 210 can be adjusted to the optimal parameter values ​​based on experiments.

[0051] The length of the blade head 210 is L, 8 mm ≤ L ≤ 20 mm.

[0052] In this embodiment, the length L of the blade head 210 is 15 mm. When the blade head 210 is shortened to 20 mm, the negative pressure drop loss in the suction chamber is reduced. When the blade head 210 is further shortened to 8 mm, the negative pressure drop loss in the suction chamber no longer decreases significantly. When the blade head 210 is 15 mm in length, the negative pressure drop loss in the suction chamber remains significantly reduced while being closer to the smoke source. This can generate a greater pressure difference on the smoke source, thereby accelerating the smoke inhalation speed, thereby achieving a more efficient smoke suction effect and significantly reducing the phenomenon of smoke leakage.

[0053] A connecting seat 121 is provided in the conducting tube 120, and a convex strip is provided on the inner wall of the conducting tube 120, and the bottom of the connecting seat 121 is clamped with the convex strip; the connecting seat 121 includes a fixed ring 1211 and a movable ring 1212 that are independent of each other, and the hollow electrode also includes an insulating sleeve 230, which is sleeved on the outside of the middle part of the hollow tube 220 and is jointly connected to the fixed ring 1211, and the tail of the hollow tube 220 is connected to the movable ring 1212.

[0054] In this embodiment, the bottom of the connecting seat 121, near the end of the blade head 210, is provided with a protrusion that cooperates with the locking hole at the end of the conducting tube 120. The inner wall of the conducting tube 120, near the blade head 210, is provided with two ridges that respectively engage with the bottom of the connecting seat 121, so that the front end of the bottom of the connecting seat 121 is clamped in the locking hole, and the two sides of the bottom are clamped in the two ridges, thereby fixing the connecting seat 121 in the conducting tube 120. The bottom of the fixing ring 1211 and the bottom of the movable ring 1212 are both connected to the connecting seat 121. The radial directions of the fixing ring 1211 and the movable ring 1212 are both parallel to the length of the conducting tube 120, and the fixing ring 1211 and the movable ring 1212 are spaced apart along the length of the tube. The head of the hollow tube 220 is the blade head 210; the middle part of the hollow tube 220 is connected to the fixed ring 1211, and an insulating sleeve 230 is provided between the middle part of the hollow tube 220 and the fixed ring 1211; the tail part of the hollow tube 220 is connected to the movable ring 1212, and a conductive spring 130 is provided between the tail part of the hollow tube 220 and the movable ring 1212.

[0055] The conductive spring 130 includes a connecting portion 131, an upturned portion 132 and a folding portion 133 connected in sequence, the folding portion 133 is located above the connecting portion 131 and the upturned portion 132, the connecting portion 131 includes an annular component 1311 and an arched component 1312, the annular component 1311 is embedded between the tail of the hollow tube 220 and the movable ring 1212, the arched component 1312 is located between the annular component 1311 and the upturned portion 132; the upturned portion 132 includes multiple connecting segments with different slopes; the folding portion 133 includes a limiting component 1331 and an abutting component 1332, the abutting component 1332 abuts against the bottom surface of the control circuit board 300, and the limiting component 1331 is inserted into the tail of the conductive tube 120.

[0056] In this embodiment, the conductive spring 130 maintains a stable electrical connection between the electrode 200 and the control circuit board 300. The connecting portion 131 of the conductive spring 130 is used to securely connect to the electrode 200. The annular component 1311 of the connecting portion 131 is positioned between the tail of the hollow tube 220 and the movable ring 1212. The arched component 1312 of the connecting portion 131 is used to increase the elasticity of the conductive spring 130. The width of the spring between the annular component 1311 and the arched component 1312 gradually narrows. The width of the spring connected to both ends of the arched component 1312 is consistent, narrower than the width of the spring between the annular component 1311 and the arched component 1312, and wider than the width of the spring between the arched component 1312 and the upturned portion 132. The upwardly curved portion 132 of the conductive spring 130 curves upward from the bottom near the conductive tube 120 to the top of the conductive tube 120. The folded portion 133 is formed by folding the upwardly curved portion 132. The folded portion 133 and the upwardly curved portion 132 form a folded angle at their connection. The folded angle is acutely angled toward the blade head 210 of the conductive tube 120 and is plugged into the rear end of the conductive tube 120. The limiting component 1331 secures the folded portion 133 to the top surface of the conductive tube 120. The abutting component 1332 abuts the folded portion 133 against the bottom circuit board 320 of the control circuit board 300 facing the top surface of the conductive tube 120.

[0057] The connecting section in the upward portion 132 connected to the connecting portion 131 is the first segment 1321, the connecting section in the upward portion 132 connected to the folding portion 133 is the third segment 1323, and the connecting section between the first segment 1321 and the third segment 1323 is the second segment 1322. The first segment 1321 and the second segment 1322 are straight line segments, and the slopes correspond to k1 and k2 respectively, k1>k2, and the third segment 1323 is an arc segment.

[0058] In this embodiment, the connecting segments in the upwardly curved portion 132 have different slopes. The first segment 1321 near the connecting portion 131 has a greater slope, while the second segment 1322 near the folded portion 133 has a smaller slope. The third segment 1323 is an arc segment, and the arc formed between the second segment 1322 and the folded portion 133 is 35 mm long. The third segment 1323 can also be formed by splicing two straight segments with gradually increasing slopes.

[0059] The tail of the conducting tube 120 is provided with an open groove, an abutment column and a through hole. The connection between the folded portion 133 and the upturned portion 132 is clamped in the open groove. The abutment column is provided below the abutment component 1332. The limiting component 1331 passes through the through hole and can float in the through hole.

[0060] In this embodiment, the tail of the conducting tube 120 is provided with an open groove, an abutment column and a through-hole in sequence from back to front. The folded angle formed at the connection between the folded portion 133 and the upturned portion 132 is clamped in the open groove. The abutment column cooperates with the abutment component 1332 so that the abutment component 1332 always maintains an electrical connection with the bottom circuit 320 of the control circuit board 300. The limiting component 1331 passes through the through-hole and floats up and down in the through-hole, so that the up and down floating of the conductive spring 130 when following the electrode 200 to slide relative to the shell 100 can be released, thereby maintaining the balance between the two ends of the abutment component 1332.

[0061] The suction nozzle 110 is provided with side openings 111 , which are evenly distributed around the outer side surface of the suction nozzle 110 close to the cutter head 210 ; the number of the side openings 111 is the same as the number of the guide bars 122 .

[0062] In this embodiment, the nozzle 110 includes four side openings 111 evenly distributed around the outer side surface near the blade head 210. This allows smoke coming into contact with the blade head 210 to be drawn into the inhalation cavity not only through the hollow tube 220 but also through the side openings 111. The guide bars 122 provided on the guide tube 120 spirally extend through the inner wall of the guide tube 120. The guide bars 122 each have a triangular cross-section within the guide tube 120. The base of the guide bar 122 is an arc, completely conforming to the inner wall of the guide tube 120. The hypotenuse of the guide bar 122 is an arc, protruding above the inner wall of the guide tube 120. The side edges of the guide bar 122 are oblique lines, connecting the hypotenuse protruding from the inner wall to the base conforming to the inner wall. The position of the guide bar 122 within the cross-section of the guide tube 120 rotates and changes along the length of the guide tube 120. The four side openings 111 are respectively disposed at the front ends of the four guide bars 122 , so that smoke is sucked into the side openings 111 and flows smoothly onto the guide bars 122 , avoiding turbulence between the side openings 111 and the guide bars 122 .

[0063] It also includes an external pipe 400 , which is connected to the tail of the suction cavity. The wires connected to the control circuit board 300 are distributed in the external pipe 400 .

[0064] In this embodiment, the external tube 400 is a freely rotatable mushroom-shaped tube that completely covers the rear end of the housing 100, keeping the cavity within the housing 100 airtight. The rear end of the external tube 400 is used to connect to a negative pressure device to maintain a stable negative pressure in the suction cavity. The wires connected to the control circuit board 300 in the installation cavity are centrally distributed in the angled conduit of the external tube 400, thereby reducing the impact of the installation cavity on the negative pressure drop.

[0065] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A retractable sliding conductive smoking pen, comprising a housing, electrodes and a control circuit board. The housing is tubular and has a cavity inside. The cavity includes an air inhalation cavity and an installation cavity separated from each other. The invention is characterized in that: The housing further comprises a nozzle, the nozzle being fixed to the front end of the cavity, and the electrode protruding from the nozzle; A conducting tube and a conductive spring are provided in the suction chamber. The suction nozzle is fixed to the front end of the conducting tube. The electrode is provided in the conducting tube. The conducting tube drives the electrode to slide and retract relative to the housing. The head of the conductive spring is connected to the electrode, and the tail of the conductive spring forms a sliding contact connection with the control circuit board. The control circuit board is arranged in the installation cavity, and the control circuit board includes a top circuit and a bottom circuit, the top circuit is used to trigger the circuit on and off of the electrode, and the bottom circuit is used to maintain continuous contact with the conductive spring; The conducting tube is provided with a plurality of spirally arranged guide strips, which are evenly spaced along the circumferential direction of the longitudinal section of the conducting tube. Each of the guide strips spirally penetrates the inner wall surface of the conducting tube, and each guide strip has the same rotation direction.

2. The retractable sliding conduction smoking pen according to claim 1, characterized in that: The electrode is a hollow electrode, comprising a hollow capillary tube and a cutter head. The tail of the cutter head protrudes from the head of the hollow capillary tube, and the two are smoothly transitioned and connected.

3. The retractable sliding conductive smoking pen according to claim 2, characterized in that: The thickness of the blade is h, the diameter of the hollow tube is D, the value range of h is 0.5 mm to 1.5 mm, and the value range of h / D is 1 / 10 to 1 / 3; The length of the arc-shaped opening chord formed by the cutter head in the cross-sectional direction is d, and the value range of d / D is 0.6 to 0.

95.

4. The retractable sliding conductive smoking pen according to claim 2, characterized in that: The length of the blade head is L, 8mm≤L≤20mm.

5. The retractable sliding conductive smoking pen according to claim 2, characterized in that: A connecting seat is provided in the conducting tube, and a convex strip is provided on the inner wall of the conducting tube, and the bottom of the connecting seat is clamped with the convex strip; the connecting seat includes a fixed ring and a movable ring that are independent of each other, and the hollow electrode also includes an insulating sleeve, which is sleeved on the outside of the middle part of the hollow tube and is jointly connected to the fixed ring, and the tail of the hollow tube is connected to the movable ring.

6. The retractable sliding conductive smoking pen according to claim 5, characterized in that: The conductive spring sheet includes a connecting portion, an upturned portion and a folding portion connected in sequence, the folding portion is located above the connecting portion and the upturned portion, the connecting portion includes an annular component and an arched component, the annular component is embedded between the tail of the hollow tube and the movable ring, the arched component is located between the annular component and the upturned portion; the upturned portion includes multiple connecting segments with different slopes; the folding portion includes a limiting component and an abutting component, the abutting component abuts against the bottom surface of the control circuit board, and the limiting component is inserted into the tail of the conductive tube.

7. The retractable sliding conductive smoking pen according to claim 6, characterized in that: The connecting segment in the upward-curved portion connected to the connecting portion is the first segment, the connecting segment in the upward-curved portion connected to the folded portion is the third segment, and the connecting segment connected between the first segment and the third segment is the second segment. The first segment and the second segment are straight line segments, and the slopes correspond to k1 and k2 respectively, k1>k2, and the third segment is an arc segment.

8. The retractable sliding conductive smoking pen according to claim 6, characterized in that: The tail of the conducting tube is provided with an open groove, an abutment column and a through hole. The connection between the folded portion and the upturned portion is clamped in the open groove. The abutment column is provided below the abutment component. The limiting component passes through the through hole and can float in the through hole.

9. A retractable sliding conduction smoking pen according to any one of claims 2 to 8, characterized in that: The suction nozzle is provided with side openings, which are evenly distributed around the outer side surface of the suction nozzle close to the blade head; the number of the side openings is the same as the number of the guide strips.

10. The retractable sliding conductive smoking pen according to claim 9, characterized in that: It also includes an external pipe, which is connected to the tail of the suction cavity, and the wires connected to the control circuit board are distributed in the external pipe.

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