A medical negative pressure suction tube and its connecting assembly

Abstract

The present invention relates to the technical field of connection components, specifically a medical negative pressure straw and its connection component, comprising a liquid collecting bottle and a negative pressure straw body, wherein the outer wall of one end of the negative pressure straw body is fixedly connected with a connecting pipe, the outer wall of the top of the liquid collecting bottle is fixedly connected with a second mounting pipe, the interior of one end of the connecting pipe is movably plugged with the outer wall of the second mounting pipe, the top of the connecting pipe is fixedly connected with a fixing frame, and the interior of the connecting pipe is provided with a reflux component, which comprises a first mounting pipe, a support plate and a blocking plate. When a fault occurs inside the negative pressure straw body, the negative pressure inside the negative pressure straw body will be reduced. At this time, the blocking plate is pushed into the interior of the circulation groove under the action of a reset spring, thereby preventing the fluid from flowing back again, and correspondingly preventing the extracted fluid from flowing back into the patient's body, thereby reducing the risk of cross infection.

Description

Technical Field

[0001] The present invention belongs to the technical field of connection components, and in particular relates to a medical negative pressure suction tube and a connection component thereof. Background Art

[0002] Medical negative pressure straws and their connecting components are key devices used in modern medicine for fluid drainage, secretion removal, and wound management. Their design must take into account safety, sealing, ease of operation, and patient comfort.

[0003] However, the conventional device still has the following problems when used:

[0004] The patent application publication number CN215840701U discloses a medical negative pressure straw sealing device. This sealing device can seal the connecting tube through the design of the sealing head, and the design of the sealing cap can seal the sealing head after it is detached from the connecting tube; the design of the connecting part enables the sealing head to be fixed anywhere in the room; the fixing part can facilitate the fixation of the utility model; the disinfection layer in the sealing cap enables the sealing head to be disinfected.

[0005] In the prior art, medical negative pressure straws need to be installed on a negative pressure machine in order to function effectively. However, when the negative pressure machine fails, the negative pressure straw may become clogged, causing pressure imbalance inside the negative pressure straw and causing fluid backflow in the negative pressure straw.

[0006] Therefore, we need a medical negative pressure straw and its connecting assembly to solve the problem of fluid backflow when the negative pressure straw is unbalanced, and to prevent the fluid backflow inside the negative pressure straw. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a medical negative pressure straw and a connecting assembly thereof, which have the advantage of preventing the backflow of fluid inside the negative pressure straw.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a medical negative pressure suction tube and a connecting assembly thereof, comprising a liquid collecting bottle and a negative pressure suction tube body, the outer wall of one end of the negative pressure suction tube body being fixedly connected to a connecting tube, the outer wall of the top of the liquid collecting bottle being fixedly connected to a mounting tube 2, the interior of one end of the connecting tube being movably connected to the outer wall of the mounting tube 2, the top of the connecting tube being fixedly connected to a fixing frame, the interior of the connecting tube being provided with a reflux assembly, the reflux assembly comprising a mounting tube 1, a support plate and a sealing plate, the outer wall of the mounting tube 1 being movably connected to the inner wall of the connecting tube.

[0009] Preferably, a sliding groove is provided on the inner wall of the connecting tube, a slider is fixedly connected to the outer wall of the mounting tube one, the outer wall of the slider is slidingly connected to the inside of the sliding groove, and the inner wall of the mounting tube one is fixedly connected to the outer wall of the support plate.

[0010] Preferably, the support plate is provided with a circular hole connected to the outer walls on both sides, the inside of the circular hole is slidably connected with a sliding rod, the outer wall of one end of the sliding rod is fixedly connected to the outer wall of one side of the blocking plate, the outer wall of one side of the blocking plate is fixedly connected to a return spring, the outer wall of one end of the return spring is fixedly connected to the outer wall of one side of the support plate, a circulation groove is provided inside the mounting tube one, the inside of the circulation groove is movably connected to the outer wall of the blocking plate, and the inner wall of the mounting tube one is fixedly connected to a guide plate.

[0011] Preferably, the inner wall of the mounting tube is rotatably connected to a fixing rod, the outer wall of the fixing rod is fixedly connected to a shaft sleeve, the outer wall of the shaft sleeve is fixedly connected to an arc-shaped leaf, the outer wall of the arc-shaped leaf is in movably contact with the inner wall of the mounting tube, the internal thread of the fixing frame is connected to a threaded rod, the outer wall of the bottom of the threaded rod is rotatably connected to a base, the outer wall of the bottom of the base is fixedly connected to an insertion rod, and the outer wall of the top of the fixing rod is provided with a square groove, and the inside of the square groove is movably plugged into the outer wall of the insertion rod.

[0012] Preferably, the outer wall of the insertion rod is fixedly connected to a mounting wheel, the outer wall of the mounting wheel is fixedly connected to a knocking rod, the interior of the fixing frame is fixedly connected to a rope, the outer wall of one end of the rope is fixedly connected to a bell, the outer wall of the bell is movably in contact with the outer wall of the knocking rod, and a second placement slot is provided on the outer wall of the top of the fixing frame, and a sound frequency meter is movably inserted into the interior of the second placement slot.

[0013] Preferably, the outer wall of the connecting tube is movably connected with a sliding sleeve, the inner wall of the sliding sleeve is tightly fitted and slidably connected with a sealing ring, the outer wall of one end of the sealing ring is movably contacted with an alcohol cotton, the inner wall of the alcohol cotton is movably contacted with the outer wall of the mounting tube 2, and the outer wall of one side of the sliding sleeve is fixedly connected with a push rod.

[0014] Preferably, a cavity is provided inside the sleeve, a tightening rope is fixedly connected inside the cavity, a positioning block is fixedly connected to the outer wall of the sleeve, a slot is provided on the tightening rope, and the interior of the slot is movably connected to the outer wall of the positioning block.

[0015] Preferably, a placement groove 1 is provided on the outer wall of one end of the connecting tube, a movable sleeve is movably inserted into the interior of the placement groove 1, a suction cup is fixedly connected to the outer wall of the movable sleeve, a through hole is provided on the movable sleeve, the interior of the through hole is movably connected to the outer wall of the push rod, and a limiting hole is provided on one side of the interior of the through hole.

[0016] Preferably, a groove is provided on the outer wall of the push rod, a mounting rod is fixedly connected to the inside of the groove, the outer wall of the mounting rod is rotatably connected to a limiting block, a torsion spring is provided on the outer wall of the mounting rod inside the limiting block, and the outer wall of the limiting block is in active contact with the inside of the limiting hole.

[0017] A medical negative pressure suction tube connection assembly comprises the medical negative pressure suction tube as described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When a fault occurs inside the negative pressure straw body, the negative pressure inside the negative pressure straw body will decrease. At this time, under the action of the reset spring, the sealing plate is pushed into the interior of the circulation groove, which can prevent the fluid from flowing back, avoiding the extracted fluid from flowing back again, and correspondingly preventing the extracted fluid from flowing back into the patient's body, thereby reducing the risk of cross infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the liquid collecting bottle of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the negative pressure straw body of the present invention.

[0022] Figure 3 It is a schematic diagram of the chute structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the placement slot structure of the present invention.

[0024] Figure 5 It is a schematic diagram of the connecting pipe structure of the present invention.

[0025] Figure 6 It is a schematic structural diagram of a cross-sectional view of the connecting pipe of the present invention.

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the installation pipe of the present invention.

[0027] Figure 8 It is a schematic diagram of the arc-shaped leaf structure of the present invention.

[0028] Figure 9 for Figure 6 Enlarged structural diagram at point A in the middle.

[0029] Figure 10 It is a schematic structural diagram of the mobile sleeve of the present invention.

[0030] Figure 11 It is a schematic diagram of the sliding sleeve structure of the present invention.

[0031] Figure 12It is a schematic diagram of the cross-sectional structure of the movable sleeve of the present invention.

[0032] Figure 13 Schematic diagram of the push rod structure of the present invention.

[0033] Figure 14 It is a schematic diagram of the positioning block structure of the present invention.

[0034] In the figure: 1. Liquid collecting bottle; 2. Negative pressure suction pipe body; 21. Connecting pipe; 3. Fixing frame; 31. Mounting wheel; 32. Inserting rod; 33. Threaded rod; 34. Knocking rod; 35. Sound frequency meter; 36. Rope; 37. Bell; 4. Sliding sleeve; 41. Push rod; 411. Groove; 412. Limiting block; 413. Mounting rod; 414. Torsion spring; 42. Sealing ring; 43. Alcohol cotton; 44. Tightening rope; 45. Positioning block; 5. Mounting tube 1; 51. Support plate; 52. Sliding rod; 53. Return spring; 54. Sealing plate; 55. Slide groove; 56. Slider; 6. Suction cup; 61. Placement groove 1; 62. Moving sleeve; 63. Through hole; 631. Limiting hole; 7. Bushing; 71. Fixing rod; 72. Square groove; 73. Arc leaf; 74. Guide plate. DETAILED DESCRIPTION

[0035] In order to clearly and completely describe the objectives and technical solutions of the present invention and make its advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] For example 1, please refer to Figures 1 to 14The present invention provides a technical solution for a medical negative pressure suction tube and its connecting assembly: it includes a liquid collecting bottle 1 and a negative pressure suction tube body 2, the outer wall of one end of the negative pressure suction tube body 2 is fixedly connected with a connecting tube 21, the outer wall of the top of the liquid collecting bottle 1 is fixedly connected with a mounting tube 2, the inner part of one end of the connecting tube 21 is movably plugged with the outer wall of the mounting tube 2, the top of the connecting tube 21 is fixedly connected with a fixing frame 3, a reflux assembly is provided inside the connecting tube 21, the reflux assembly includes a mounting tube 5, a support plate 51 and a blocking plate 54, the outer wall of the mounting tube 5 is movably plugged with the inner wall of the connecting tube 21, a slide groove 55 is opened on the inner wall of the connecting tube 21, and the outer wall of the mounting tube 5 is fixed It is connected with a slider 56, the outer wall of the slider 56 is slidably connected to the inside of the slide groove 55, the inner wall of the mounting tube 55 is fixedly connected to the outer wall of the support plate 51, a circular hole is provided on the support plate 51 with the outer walls on both sides connected, the inner part of the circular hole is slidably connected with a slide rod 52, the outer wall of one end of the slide rod 52 is fixedly connected to the outer wall of one side of the blocking plate 54, the outer wall of one side of the blocking plate 54 is fixedly connected to a return spring 53, the outer wall of one end of the return spring 53 is fixedly connected to the outer wall of one side of the support plate 51, a circulation groove is provided inside the mounting tube 5, the inside of the circulation groove is movably plugged into the outer wall of the blocking plate 54, and the inner wall of the mounting tube 5 is fixedly connected to a guide plate 74.

[0037] When a fault occurs inside the negative pressure pipette body 2, the negative pressure inside the negative pressure pipette body 2 will decrease. At this time, the blocking plate 54 is pushed into the flow groove under the action of the return spring 53, thereby preventing the fluid from flowing back and preventing the extracted fluid from flowing back into the patient's body, thereby reducing the risk of cross infection.

[0038] After the insertion rod 32 is connected to the square groove 72, the installation tube 5 can be fixed inside the connecting tube 21, preventing the installation tube 5 from moving left and right inside the connecting tube 21 during operation. Accordingly, while increasing the stability of the installation tube 5, it is also convenient to remove the installation tube 5 from the inside of the connecting tube 21.

[0039] Embodiment 2: Based on embodiment 1, the inner wall of the mounting tube 5 is rotatably connected to a fixing rod 71, the outer wall of the fixing rod 71 is fixedly connected to a sleeve 7, the outer wall of the sleeve 7 is fixedly connected to an arc-shaped leaf 73, the outer wall of the arc-shaped leaf 73 is in movably contact with the inner wall of the mounting tube 5, the internal thread of the fixing frame 3 is connected to a threaded rod 33, the outer wall of the bottom of the threaded rod 33 is rotatably connected to a base, the outer wall of the bottom of the base is fixedly connected to an insertion rod 32, and the outer wall of the top of the fixing rod 71 is provided with a square groove 72, the inside of the square groove 72 is movably plugged into the outer wall of the insertion rod 32.

[0040] The arc-shaped leaves 73 rotate under the impact of the fluid, and the rotating arc-shaped leaves 73 exert a tangential force on the fluid, causing the fluid to produce a vortex motion, thereby reducing the probability of the fluid adhering to the inner wall of the mounting tube 5. At the same time, the arc-shaped leaves 73 rotate to form local turbulence, thereby avoiding the deposition of particulate objects in the dead corners inside the mounting tube 5. Since the arc-shaped leaves 73 are in contact with the inner wall of the mounting tube 5, the impurities on the inner wall of the mounting tube 5 can be scraped off when the arc-shaped leaves 73 rotate, thereby reducing the accumulation of impurities inside the mounting tube 5, thereby reducing the blockage of the mounting tube 5 caused by the accumulation of impurities, and correspondingly increasing the working efficiency of the mounting tube 5.

[0041] Example three, based on Example two, the outer wall of the insertion rod 32 is fixedly connected to the mounting wheel 31, the outer wall of the mounting wheel 31 is fixedly connected to the knocking rod 34, the interior of the fixing frame 3 is fixedly connected to the rope 36, the outer wall of one end of the rope 36 is fixedly connected to the bell 37, the outer wall of the bell 37 is in movably contact with the outer wall of the knocking rod 34, and the outer wall of the top of the fixing frame 3 is provided with a placement groove 2, and the interior of the placement groove 2 is movably plugged with a sound frequency meter 35.

[0042] The knocking rod 34 will ring the bell 37 once every time it rotates. When the frequency of the bell 37 ringing is faster, it means that the fluid flow rate inside the negative pressure straw body 2 is faster and there is no blockage inside the negative pressure straw body 2. When the interval between the ringing of the bell 37 increases, it means that the fluid speed inside the negative pressure straw body 2 is slower and there is a blockage or other fault inside the negative pressure straw body 2. Through the cooperation of the arc-shaped leaf 73 and the bell 37, the medical staff can timely understand the working conditions inside the negative pressure straw body 2, avoiding the medical staff from being unable to timely discover when there is a fault inside the negative pressure straw body 2. Accordingly, according to the speed of the ringing frequency of the bell 37, when the ringing frequency of the bell 37 is slower, the buzzer on the sound frequency meter 35 sounds to remind the medical staff to observe the fluid flow inside the negative pressure straw body 2 in time.

[0043] Embodiment 4, on the basis of embodiment 1, the outer wall of the connecting tube 21 is movably connected with a sliding sleeve 4, the inner wall of the sliding sleeve 4 is tightly fitted and slidably connected with a sealing ring 42, the outer wall of one end of the sealing ring 42 is movably contacted with an alcohol cotton swab 43, the inner wall of the alcohol cotton swab 43 is movably contacted with the outer wall of the mounting tube 2, the outer wall of one side of the sliding sleeve 4 is fixedly connected with a push rod 41, the interior of the sliding sleeve 4 is provided with a cavity, the interior of the cavity is fixedly connected with a tightening rope 44, the outer wall of the sliding sleeve 4 is fixedly connected with a positioning block 45, the tightening rope 44 is provided with a slot, the interior of the slot is movably connected with the outer wall of the positioning block 45.

[0044] The alcohol cotton swab 43 provided inside the sliding sleeve 4 contacts the outer wall of the mounting tube 2 when the mounting tube 2 is inserted. During the contact process, the alcohol on the alcohol cotton swab 43 disinfects the outer wall of the mounting tube 2, thereby preventing bacteria and viral microorganisms from being present at the port of the outer wall of the mounting tube 2. Accordingly, the alcohol can quickly kill bacteria and viruses on the port of the outer wall of the mounting tube 2, thereby reducing the risk of infection and ensuring the safety of medical operations.

[0045] After the connecting tube 21 moves to the bottom of the second installation tube, the medical staff can pull the tightening rope 44 with both hands. When the tightening rope 44 is subjected to force, it can tighten the sliding sleeve 4, thereby increasing the sealing between the connecting tube 21 and the second installation tube. The tightening rope 44 is then put on the positioning block 45 through the slot on the tightening rope 44 to fix the tightening rope 44. This operation is simple and quick, which is convenient for medical staff to install and fix it, thereby saving medical staff's operation time.

[0046] Embodiment 5, on the basis of embodiment 4, a placement groove 61 is provided on the outer wall of one end of the connecting tube 21, a movable sleeve 62 is movably inserted inside the placement groove 61, the outer wall of the movable sleeve 62 is fixedly connected to the suction cup 6, a through hole 63 is provided on the movable sleeve 62, the interior of the through hole 63 is movably connected to the outer wall of the push rod 41, a limiting hole 631 is provided on one side of the interior of the through hole 63, the outer wall of the push rod 41 is provided with a groove 411, the interior of the groove 411 is fixedly connected to the mounting rod 413, the outer wall of the mounting rod 413 is rotatably connected to the limiting block 412, the interior of the limiting block 412 is located on the outer wall of the mounting rod 413 and a torsion spring 414 is provided, and the outer wall of the limiting block 412 is in movably contact with the interior of the limiting hole 631.

[0047] The edge of the limiting hole 631 blocks the limiting block 412, causing the limiting block 412 to rotate on the mounting rod 413 and enter the interior of the groove 411. The limiting block 412 moves toward the interior of the through hole 63 along with the push rod 41. After the limiting block 412 moves out of the limiting hole 631, the fixing of the limiting block 412 to the limiting hole 631 is released, thereby preventing the movable sleeve 62 from always being inside the placement groove 1 61, and accordingly allowing the movable sleeve 62 to move freely.

[0048] Take out the movable sleeve 62 from the placement groove 61, move the movable sleeve 62 to a suitable position on the negative pressure suction tube body 2, and use the suction cup 6 to suck it on the bed or the patient, so as to prevent the negative pressure suction tube body 2 from slipping or moving during operation, and correspondingly increase the stability of the connecting tube 21.

[0049] The working principle and usage process of the present invention: When working, first, take out the negative pressure straw body 2 and connect it to the mounting tube 2 on the liquid collecting bottle 1, and insert the connecting tube 21 on the negative pressure straw body 2 into the mounting tube 2. The sealing ring 42 will first contact and stop with the bottom of the mounting tube 2, and then pass through the alcohol cotton 43 arranged inside the sliding sleeve 4. When inserting the mounting tube 2, the alcohol cotton 43 contacts the outer wall of the mounting tube 2. During the contact process, the alcohol on the alcohol cotton 43 disinfects the outer wall of the mounting tube 2, avoiding bacteria, virus microorganisms at the port of the outer wall of the mounting tube 2. Accordingly, through the action of alcohol, the bacteria and viruses on the port of the outer wall of the mounting tube 2 can be quickly killed, reducing the risk of infection and ensuring the safety of medical operations.

[0050] It should be noted that the material of the negative pressure straw body 2 is medical-grade PVC soft material, which has biocompatibility, flexibility and fracture resistance. The inner wall of the negative pressure straw body 2 is provided with a silver nanoparticle-growth factor gradient coating, which releases silver ions to inhibit bacteria in the first seventy-two hours, and then switches to releasing growth factors to promote epithelial repair after seventy-two hours.

[0051] When the medical staff continues to push the connecting tube 21 downward, the sliding sleeve 4 can slide on the outer wall of the alcohol cotton 43, so that the sliding sleeve 4 and the sealing ring 42 overlap. Since one end of the alcohol cotton 43 is in contact with one end of the sealing ring 42, the alcohol cotton 43 remains stationary when the sealing ring 42 can no longer move. After the sliding sleeve 4 and the sealing ring 42 overlap, the alcohol cotton 43 can leak out of the outer wall of the sliding sleeve 4. At this time, the alcohol cotton 43 is pulled out from the interior of the sliding sleeve 4 to avoid the alcohol cotton 43 always existing in the interior of the sliding sleeve 4 and causing the environment inside the sliding sleeve 4 to be humid. Correspondingly, it is prevented that the alcohol cotton 43 always exists in the interior of the sliding sleeve 4 and causes damage to the outer wall of the mounting tube 2.

[0052] It should be noted that there is an opening on one side of the alcohol cotton 43, which is convenient for removing the alcohol cotton 43 from the connecting tube 21. After the connecting tube 21 is removed from the mounting tube 2, it is necessary to take a new alcohol cotton 43 and install it inside the sliding sleeve 4 to facilitate re-disinfection when the connecting tube 21 is connected to the mounting tube 2.

[0053] After the sliding sleeve 4 stops moving, the connecting tube 21 continues to move downward, which will cause the push rod 41 to move toward the inside of the through hole 63. When the push rod 41 drives the limit block 412 to move, the edge of the limit hole 631 will block the limit block 412, causing the limit block 412 to rotate on the mounting rod 413 and enter the inside of the groove 411. As the push rod 41 moves toward the inside of the through hole 63, after the limit block 412 moves out of the limit hole 631, the fixation of the limit block 412 to the limit hole 631 can be released, thereby preventing the movable sleeve 62 from always being inside the placement groove 61, and correspondingly allowing the movable sleeve 62 to move freely.

[0054] It should be noted that, by means of the torsion spring 414 , when the limiting block 412 moves to the position of the limiting hole 631 again, the limiting block 412 can be pushed into the interior of the limiting hole 631 again.

[0055] After the connecting tube 21 moves to the bottom of the second installation tube, the medical staff can pull the tightening rope 44 with both hands. When the tightening rope 44 is subjected to force, it can tighten the sliding sleeve 4, thereby increasing the sealing between the connecting tube 21 and the second installation tube. The tightening rope 44 is then put on the positioning block 45 through the slot on the tightening rope 44 to fix the tightening rope 44. This operation is simple and quick, which is convenient for medical staff to install and fix it, thereby saving medical staff's operation time.

[0056] After the connecting tube 21 is fixed to the mounting tube 2, the movable sleeve 62 can be taken out from the placement groove 1 61. After the movable sleeve 62 is moved to a suitable position on the negative pressure suction tube body 2, the suction cup 6 is used to suck it on the bed or the patient, thereby preventing the negative pressure suction tube body 2 from slipping or moving during operation, and correspondingly increasing the stability of the connecting tube 21.

[0057] When the negative pressure machine is started to work, the negative pressure pipe body 2 can start to work, so that the fluid enters the interior of the negative pressure pipe body 2. Through the setting of the guide plate 74, the fluid can be guided to flow to the arc-shaped leaf 73. The arc-shaped leaf 73 rotates under the impact of the fluid. The rotating arc-shaped leaf 73 exerts a tangential force on the fluid, causing the fluid to produce a vortex motion, thereby reducing the probability of the fluid adhering to the inner wall of the installation tube 5. At the same time, the arc-shaped leaf 73 rotates to form local turbulence, thereby avoiding the deposition of particulate objects in the dead corners inside the installation tube 5. Since the arc-shaped leaf 73 is in contact with the inner wall of the installation tube 5, the impurities on the inner wall of the installation tube 5 can be scraped off when the arc-shaped leaf 73 rotates, reducing the accumulation of impurities inside the installation tube 5, thereby reducing the blockage of the installation tube 5, and correspondingly increasing the working efficiency of the installation tube 5.

[0058] The rotation of the arc leaf 73 can drive the shaft sleeve 7 to rotate the fixing rod 71, and then the rotation of the fixing rod 71 can drive the square groove 72 to rotate the insertion rod 32. Due to the fixed connection between the insertion rod 32 and the mounting wheel 31, the mounting wheel 31 can drive the knocking rod 34 to rotate while the insertion rod 32 rotates. When the knocking rod 34 rotates to contact the bell 37, the bell 37 can be sounded. The knocking rod 34 will ring the bell 37 once every rotation of the knocking rod 34. When the frequency of the ringing of the bell 37 is faster, it indicates that the fluid flow rate inside the negative pressure pipe body 2 is faster and there is no pressure inside the negative pressure pipe body 2. In the event of blockage, when the interval between the ringing of the bell 37 increases, it indicates that the fluid speed inside the negative pressure straw body 2 is slow, and a blockage or other fault has occurred inside the negative pressure straw body 2. Through the cooperation of the arc-shaped leaf 73 and the bell 37, the medical staff can timely understand the working conditions inside the negative pressure straw body 2, thereby avoiding the medical staff's failure to timely discover when a fault occurs inside the negative pressure straw body 2. Accordingly, by adjusting the ringing frequency of the bell 37, when the ringing frequency of the bell 37 is slow, the buzzer on the sound frequency meter 35 sounds to remind the medical staff to observe the fluid flow inside the negative pressure straw body 2 in time.

[0059] It should be noted that the negative pressure suction tube body 2, the connecting tube 21 and the mounting tube 5 are transparent, making it easier for medical staff to observe the internal conditions.

[0060] It should be noted that the sound frequency meter 35 is a prior art. The sound emitted by the bell 37 during the knocking process is collected by the MEMS microphone in the sound frequency meter 35. The microphone converts the sound wave signal into an electrical signal and transmits it to the single-chip microcomputer or microcontroller for processing. The single-chip microcomputer analyzes the electrical signal through a digital signal processing algorithm and calculates the frequency of the sound of the bell 37. The frequency value can be displayed on the screen in real time, and the internal working status of the negative pressure straw body 2 can be judged according to the changes in the bell 37.

[0061] When a fault occurs inside the negative pressure pipette body 2, the negative pressure inside the negative pressure pipette body 2 will decrease. At this time, under the action of the reset spring 53, the sealing plate 54 is pushed into the interior of the circulation groove, which can prevent the fluid from flowing back and avoid the extracted fluid from flowing back again. Correspondingly, it prevents the extracted fluid from flowing back into the patient's body, thereby reducing the risk of cross infection.

[0062] By rotating the threaded rod 33 by medical staff, the threaded rod 33 can drive the insertion rod 32 to move upward inside the square groove 72, thereby releasing the fixation of the insertion rod 32 on the square groove 72, and the installation tube 5 and the interior of the connecting tube 21 can be taken out for cleaning or replacement. After the insertion rod 32 is connected to the square groove 72, the installation tube 5 can be fixed inside the connecting tube 21, avoiding the installation tube 5 from moving left and right inside the connecting tube 21 during operation. Accordingly, while increasing the stability of the installation tube 5, it is also convenient to remove the installation tube 5 from the interior of the connecting tube 21.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A medical negative pressure pipette, comprising a liquid collection bottle (1) and a negative pressure pipette body (2), characterized in that: The outer wall of one end of the negative pressure pipette body (2) is fixedly connected to a connecting pipe (21), the outer wall of the top of the liquid collecting bottle (1) is fixedly connected to a second mounting pipe, the interior of one end of the connecting pipe (21) is movably plugged into the outer wall of the second mounting pipe, the top of the connecting pipe (21) is fixedly connected to a fixing frame (3), and a reflux component is provided inside the connecting pipe (21); The reflux assembly comprises a mounting tube (5), a support plate (51) and a blocking plate (54), wherein the outer wall of the mounting tube (5) is movably connected to the inner wall of the connecting tube (21); The outer wall of the connecting tube (21) is movably connected to a sliding sleeve (4), the inner wall of the sliding sleeve (4) is tightly fitted and slidably connected to a sealing ring (42), the outer wall of one end of the sealing ring (42) is movably in contact with an alcohol cotton (43), the inner wall of the alcohol cotton (43) is movably in contact with the outer wall of the second mounting tube, and the outer wall of one side of the sliding sleeve (4) is fixedly connected to a push rod (41); A cavity is provided inside the sliding sleeve (4), a tightening rope (44) is fixedly connected to the inside of the cavity, a positioning block (45) is fixedly connected to the outer wall of the sliding sleeve (4), a slot is provided on the tightening rope (44), and the inside of the slot is movably connected to the outer wall of the positioning block (45).

2. A medical negative pressure suction straw according to claim 1, characterized in that: The inner wall of the connecting tube (21) is provided with a sliding groove (55), the outer wall of the mounting tube (5) is fixedly connected with a slider (56), the outer wall of the slider (56) is slidably connected to the inside of the sliding groove (55), and the inner wall of the mounting tube (5) is fixedly connected to the outer wall of the support plate (51).

3. The medical negative pressure suction straw according to claim 1, characterized in that: The support plate (51) is provided with a circular hole with outer walls on both sides connected to each other, and a slide rod (52) is slidably connected inside the circular hole, and the outer wall of one end of the slide rod (52) is fixedly connected to the outer wall of one side of the blocking plate (54), and the outer wall of one side of the blocking plate (54) is fixedly connected to a return spring (53), and the outer wall of one end of the return spring (53) is fixedly connected to the outer wall of one side of the support plate (51), and a flow groove is provided inside the mounting tube (5), and the interior of the flow groove is movably connected to the outer wall of the blocking plate (54), and the inner wall of the mounting tube (5) is fixedly connected to a guide plate (74).

4. The medical negative pressure suction straw according to claim 1, characterized in that: The inner wall of the mounting tube (5) is rotatably connected to a fixing rod (71), the outer wall of the fixing rod (71) is fixedly connected to a shaft sleeve (7), the outer wall of the shaft sleeve (7) is fixedly connected to an arc leaf (73), the outer wall of the arc leaf (73) is in movably contact with the inner wall of the mounting tube (5), the internal thread of the fixing frame (3) is connected to a threaded rod (33), the outer wall of the bottom of the threaded rod (33) is rotatably connected to a base, the outer wall of the bottom of the base is fixedly connected to an insertion rod (32), the outer wall of the top of the fixing rod (71) is provided with a square groove (72), the inside of the square groove (72) is movably plugged into the outer wall of the insertion rod (32).

5. The medical negative pressure suction tube according to claim 4, characterized in that: The outer wall of the insertion rod (32) is fixedly connected to a mounting wheel (31), the outer wall of the mounting wheel (31) is fixedly connected to a knocking rod (34), the interior of the fixing frame (3) is fixedly connected to a rope (36), the outer wall of one end of the rope (36) is fixedly connected to a bell (37), the outer wall of the bell (37) is in movably contact with the outer wall of the knocking rod (34), and the outer wall of the top of the fixing frame (3) is provided with a second placement groove, and a sound frequency meter (35) is movably inserted into the interior of the second placement groove.

6. The medical negative pressure suction straw according to claim 1, characterized in that: A placement groove (61) is provided on the outer wall of one end of the connecting tube (21), a movable sleeve (62) is movably inserted into the interior of the placement groove (61), a suction cup (6) is fixedly connected to the outer wall of the movable sleeve (62), a through hole (63) is provided on the movable sleeve (62), the interior of the through hole (63) is movably connected to the outer wall of the push rod (41), and a limiting hole (631) is provided on one side of the interior of the through hole (63).

7. The medical negative pressure suction tube according to claim 6, characterized in that: The outer wall of the push rod (41) is provided with a groove (411), the interior of the groove (411) is fixedly connected to a mounting rod (413), the outer wall of the mounting rod (413) is rotatably connected to a limiting block (412), the interior of the limiting block (412) is provided with a torsion spring (414) located on the outer wall of the mounting rod (413), and the outer wall of the limiting block (412) is in movable contact with the interior of the limiting hole (631).

8. A medical negative pressure suction tube connection assembly, characterized by: A medical negative pressure suction straw comprising any one of claims 1 to 7.

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