A suction device for treating otitis media in children

Abstract

This invention discloses a suction device for treating otitis media in children, belonging to the field of otitis media treatment technology. It comprises a fixed spring, a connecting sleeve, a suction catheter, a fixed needle sleeve, and a clamping sleeve. After the fixed block on the inner wall of the clamping sleeve aligns with the arc-shaped groove, releasing the connecting sleeve causes the first moving block to reset within the strip-shaped mounting groove under the rebound of the fixed spring. This moves the connecting sleeve from the mounting sleeve surface to the clamping sleeve surface, while simultaneously squeezing the clamping sleeve to clamp it onto the fixed needle sleeve surface until the fixed block engages in the annular groove. At the same time, the connecting sleeve is pressed against the limiting block, causing the inner wall of the connecting sleeve to squeeze the second rubber retaining ring, thus clamping and fixing the connecting sleeve onto the clamping sleeve surface. This ensures that when the suction needle is inserted into the child's ear canal for suction treatment, the fixed needle sleeve will not detach from the suction catheter surface due to the child's struggles.

Description

Technical Field

[0001] This invention relates to the field of pediatric otitis media treatment technology, specifically to a suction device for treating pediatric otitis media. Background Technology

[0002] Otitis media is a common childhood illness, primarily caused by bacterial or viral infections. Children's Eustachian tubes are relatively short, wide, and horizontal, making them prone to secretion accumulation and infection. Adenoid hypertrophy, allergies, foreign bodies in the ear canal, and excessive earwax buildup can also trigger otitis media. Middle ear effusion, tympanic membrane perforation, and damage to the ossicles can all affect sound conduction, leading to hearing loss. Hearing impairment affects a child's perception and imitation of sound, resulting in inaccurate pronunciation, difficulty understanding others' speech, and an inability to clearly express their thoughts and feelings, thus affecting language development. As otitis media develops, it can also cause other complications, which can be life-threatening in severe cases. When treating otitis media in children, it is necessary to first clean the purulent secretions in the ear canal, and then instill medication into the ear canal for treatment. When cleaning the purulent secretions in the ear canal, a negative pressure suction device is often used. The negative pressure suction device can generate strong negative pressure to effectively suction out the pus from the wound or ear canal, ensuring that the pus is completely removed and preventing the accumulation of pus from aggravating the infection. At the same time, the negative pressure suction device causes less damage to the surrounding tissues, reducing secondary damage caused by the debridement operation.

[0003] Existing suction devices for treating otitis media in children often cause discomfort when the suction needle is inserted into the ear canal to aspirate pus. This is because children struggle due to the foreign object in the ear canal. Since the suction needle is typically directly attached to the suction catheter, it is easy for the needle to detach during this struggle, affecting the suction and cleaning of pus from the ear canal. Furthermore, the suction device usually has a catheter at its end for centralized treatment of the aspirated pus. When moving the suction device with the child, this catheter can restrict its movement, hindering its operation. Therefore, improvements are needed.

[0004] Based on this, the present invention designs a suction device for the treatment of otitis media in children to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a suction device for treating otitis media in children, to solve the problems mentioned in the background art. In existing suction devices for treating otitis media in children, when the suction needle is inserted into the child's ear canal to suction pus, the child struggles due to the foreign object in the ear canal. Since the suction needle is generally directly attached to the surface of the suction catheter, the needle tip easily detaches from the suction catheter during the struggle, affecting the suction and cleaning of pus from the child's ear canal. Furthermore, the negative pressure suction device is generally connected to a catheter at its end, which collects the suctioned pus through a long catheter for centralized treatment. When the negative pressure suction device is moved with the child, the catheter can restrict the movement of the device, affecting its mobility.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A suction device for treating otitis media in children includes a negative pressure suction device body. One end of the negative pressure suction device body is connected to a discharge conduit. A snap-fit ​​mechanism is fixedly installed at one end of the negative pressure suction device body located on the surface of the discharge conduit. A pus collection cylinder is provided on one side of the snap-fit ​​mechanism. A connecting conduit is fixedly installed at the end of the negative pressure suction device body away from the discharge conduit. A connecting mechanism is fixedly connected to the surface of the connecting conduit. A suction conduit is connected at one end of the connecting conduit. A clamping sleeve is fixedly installed at one end of the connecting conduit located on the surface of the suction conduit. A plastic needle tube is provided on the surface of the suction conduit located inside the clamping sleeve. Hand grips are provided on the surfaces of the negative pressure suction device body and the pus collection cylinder.

[0008] As a further embodiment of the present invention, the connecting and fixing mechanism includes an installation sleeve, the surface of which is provided with six strip-shaped installation grooves at equal angles, an installation slide rod is fixedly installed inside the strip-shaped installation grooves, a first moving block is slidably installed on the surface of the installation slide rod, a connecting sleeve is fixedly installed on the surface of the six first moving blocks, and the connecting sleeve is slidably connected to the surface of the installation sleeve, and a fixing spring is provided on the surface of the installation slide rod located on one side of the first moving block.

[0009] As a further embodiment of the present invention, the surface of the clamping sleeve corresponds to the inner wall of the connecting sleeve, a second rubber retaining ring is fixedly installed on the surface of one end of the clamping sleeve, six clamping gaps are provided at equal angles on the surface of the end of the clamping sleeve away from the second rubber retaining ring, a fixing block is fixedly installed on the inner wall of the clamping sleeve between two adjacent clamping gaps, and six limiting blocks are fixedly installed on one end of the clamping sleeve.

[0010] As a further embodiment of the present invention, the plastic needle tube includes a fixed needle sleeve, the inner wall of the fixed needle sleeve is provided with four limiting grooves at equal angles, the surface of the fixed needle sleeve is provided with an annular groove, the annular groove corresponds to the position of the fixed block, and a suction needle is connected to one side of the fixed needle sleeve.

[0011] As a further embodiment of the present invention, four first limiting strips are fixedly installed at equal angles on the surface of the suction conduit. The first limiting strips correspond to the limiting slots in position and have the same shape. Six second limiting strips are fixedly installed at equal angles on the surface of the negative pressure suction device body near the discharge conduit. A first rubber retaining ring is fixedly installed on the side of the negative pressure suction device body located on the second limiting strips.

[0012] As a further embodiment of the present invention, the snap-fit ​​fixing mechanism includes a mounting ring, the mounting ring having four positioning slots at equal angles on its surface, and an arc-shaped mounting groove on one side of each of the four positioning slots on the surface of the mounting ring. An arc-shaped sliding rod is fixedly installed on the inner wall of the arc-shaped mounting groove, and a second moving block is slidably installed on the surface of one end of the arc-shaped sliding rod.

[0013] As a further embodiment of the present invention, the surface of the arc-shaped sliding rod located on one side of the second moving block is provided with a reset spring, and four rotating retaining rings are fixedly installed on the surfaces of the four second moving blocks, and the rotating retaining rings are movably connected to the surface of the mounting rings. The rotating retaining rings are provided with four L-shaped fixing slots at equal angles inside, and the L-shaped fixing slots correspond to the positions of the positioning slots.

[0014] As a further embodiment of the present invention, four positioning blocks are fixedly installed at equal angles on one side of the pus collection cylinder, and the positioning blocks correspond to the positions of the positioning slots and the L-shaped fixing slots. A pressure stabilizing vent is provided on the side of the pus collection cylinder away from the positioning blocks, and an elastic plug is provided inside the pressure stabilizing vent.

[0015] As a further embodiment of the present invention, six limiting grooves are provided at equal angles on one end of the inner wall of the hand sleeve, and the limiting grooves correspond to the positions of the second limiting strip. An anti-slip sleeve is fixedly installed on the surface of the hand sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention comprises a fixed spring, a connecting sleeve, a suction conduit, a fixed needle sleeve, and a clamping sleeve. The connecting sleeve is moved from the surface of the clamping sleeve to the surface of the mounting sleeve, causing the connecting sleeve to slide within the strip-shaped mounting groove, compressing the fixed spring and deforming it against the corresponding mounting slide rod surface. As the connecting sleeve moves away from the surface of the clamping sleeve, the clamping sleeve gradually opens, increasing the space between the clamping sleeves. The fixed needle sleeve is then inserted into the clamping sleeve and fitted onto the surface of the suction conduit until the fixed block on the inner wall of the clamping sleeve aligns with the arc-shaped groove. The connection sleeve is then released. Under the rebound action of the fixed spring, the connecting sleeve pushes up the first moving block and resets it inside the strip-shaped mounting groove, driving the connecting sleeve from the mounting sleeve surface to the clamping sleeve surface. At the same time, the connecting sleeve squeezes the clamping sleeve, clamping the clamping sleeve onto the surface of the fixed needle sleeve until the fixed block is inserted into the annular groove. Simultaneously, the connecting sleeve and the limiting block are pressed together, causing the inner wall of the connecting sleeve to squeeze the second rubber retaining ring, clamping and fixing the connecting sleeve onto the surface of the clamping sleeve. This ensures that when the suction needle is inserted into the child's ear canal for suction treatment, the fixed needle sleeve will not fall off the surface of the suction catheter due to the child's struggle.

[0018] 2. This invention comprises an installation ring, a return spring, a rotating retaining ring, a pus collection cylinder, and a positioning block. Twisting the rotating retaining ring rotates it on the surface of the installation ring until the notch of the L-shaped fixing groove aligns with the position of the positioning slot. This causes the rotating retaining ring to drive the second moving block to rotate inside the arc-shaped installation groove, compressing the return spring and deforming it on the surface of the arc-shaped sliding rod. This lifts the pus collection cylinder, allowing the positioning block on one side of the pus collection cylinder to be inserted into the corresponding positioning slot until the pus collection cylinder is tightly against the installation ring. Simultaneously, the positioning hole is fully inserted into the positioning slot. Releasing the rotating retaining ring allows the return spring to push up the second moving block, resetting it on the surface of the arc-shaped sliding rod. Controlling the rotation of the rotating retaining ring on the surface of the installation ring causes misalignment between the L-shaped fixing groove and the positioning slot, thereby clamping and fixing the positioning block inside the corresponding positioning slot and clamping and fixing the pus collection cylinder to one end of the negative pressure suction device body. This facilitates the disassembly, cleaning, or connection and fixation of the pus collection cylinder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the combined cross-sectional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the negative pressure suction device body and the connecting tube of the present invention;

[0022] Figure 3 This is a cross-sectional view of the mounting sleeve, fixing spring, and connecting sleeve of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the clamping sleeve, the second rubber retaining ring, and the limiting block of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the fixed needle sheath and the suction needle of the present invention;

[0025] Figure 6 This is a cross-sectional view of the mounting ring and rotating retaining ring of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A;

[0027] Figure 8 This is a schematic diagram of the structure of the pus collection tube, positioning block, and elastic plug of the present invention;

[0028] Figure 9 This is a cross-sectional view of the hand grip and anti-slip sleeve of the present invention.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Negative pressure suction device body; 101. Discharge conduit; 102. Connecting conduit; 103. Suction conduit; 104. First limiting clip; 105. Second limiting clip; 106. First rubber retaining ring; 2. Connecting and fixing mechanism; 201. Mounting sleeve; 202. Strip mounting groove; 203. Mounting slide bar; 204. First moving block; 205. Fixing spring; 206. Connecting sleeve; 3. Clamping sleeve; 301. Second rubber retaining ring; 302. Clamping gap; 303. Fixing block; 304. Limiting stop; 4. Plastic 401. Needle tube; 402. Fixed needle sleeve; 403. Limiting groove; 404. Annular groove; 405. Suction needle; 5. Snap-fit ​​fixing mechanism; 501. Mounting ring; 502. Positioning slot; 503. Arc-shaped mounting groove; 504. Arc-shaped sliding rod; 505. Second moving block; 506. Return spring; 507. Rotating retaining ring; 508. L-shaped fixing groove; 6. Pus collection tube; 601. Positioning insert; 602. Pressure stabilizing vent; 603. Elastic plug; 7. Hand grip; 701. Limiting groove; 702. Anti-slip sleeve. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-3 The present invention provides a technical solution: a suction device for treating otitis media in children, comprising a negative pressure suction device body 1, one end of which is connected to a discharge conduit 101, and the other end is fixedly installed with a connecting conduit 102. A connecting fixing mechanism 2 is fixedly connected to the surface of the connecting conduit 102. The connecting fixing mechanism 2 includes an installation sleeve 201. The surface of the installation sleeve 201 is provided with six strip-shaped installation grooves 202 at equal angles. An installation slide rod 203 is fixedly installed inside the strip-shaped installation grooves 202. A first moving block 204 is slidably installed through the surface of the installation slide rod 203. A fixing spring 205 is provided on the surface of the installation slide rod 203 located on one side of the first moving block 204. A connecting sleeve 206 is fixedly installed on the surface of the six first moving blocks 204, and the connecting sleeve 206 is slidably connected to the surface of the installation sleeve 201.

[0033] like Figure 4 As shown, one end of the connecting conduit 102 is connected to a suction conduit 103. A clamping sleeve 3 is fixedly installed at one end of the connecting conduit 102 on the surface of the suction conduit 103. The surface of the clamping sleeve 3 corresponds to the inner wall of the connecting sleeve 206. A second rubber retaining ring 301 is fixedly installed on the surface of one end of the clamping sleeve 3. Six clamping gaps 302 are provided at equal angles on the surface of the end of the clamping sleeve 3 away from the second rubber retaining ring 301. A fixing block 303 is fixedly installed on the inner wall of the clamping sleeve 3 between two adjacent clamping gaps 302. Six limiting blocks 304 are fixedly installed at the other end of the clamping sleeve 3.

[0034] like Figure 5 As shown, the suction tube 103 is provided with a plastic needle tube 4 on the surface inside the clamping sleeve 3. The plastic needle tube 4 includes a fixed needle sleeve 401. A suction needle 404 is connected to one side of the fixed needle sleeve 401. The surface of the fixed needle sleeve 401 is provided with an annular groove 403, which corresponds to the position of the fixed block 303. The inner wall of the fixed needle sleeve 401 is provided with four limiting grooves 402 at equal angles. Four first limiting strips 104 are fixedly installed at equal angles on the surface of the suction tube 103. The first limiting strips 104 correspond to the positions of the limiting grooves 402 and have the same shape.

[0035] Push the connecting sleeve 206 to slide on the surfaces of the clamping sleeve 3 and the mounting sleeve 201 until the connecting sleeve 206 is moved from the surface of the clamping sleeve 3 to the surface of the mounting sleeve 201, so that the connecting sleeve 206 loosens the clamping sleeve 3, thereby facilitating the loosening or clamping of the plastic needle tube 4 clamped inside the clamping sleeve 3.

[0036] Simultaneously, during the movement of the connecting sleeve 206, the first moving block 204 slides on the surface of the mounting slide rod 203 inside the corresponding strip mounting groove 202, causing the first moving block 204 to push the fixing spring 205 to compress and deform. After the plastic needle tube 4 is inserted into the clamping sleeve 3, the connecting sleeve 206 is released and, under the rebound action of the fixing spring 205, the connecting sleeve 206 is lifted and moved from the surface of the mounting sleeve 201 to the surface of the clamping sleeve 3, causing the connecting sleeve 206 to compress the clamping sleeve 3 and clamp and fix the plastic needle tube 4 inside the clamping sleeve 3.

[0037] When the connecting sleeve 206 is completely pressed against the surface of the clamping sleeve 3, the inner wall of the connecting sleeve 206 deforms the second rubber retaining ring 301 by squeezing it, causing the second rubber retaining ring 301 to spring back and clamp the connecting sleeve 206, thereby clamping and fixing the connecting sleeve 206 to the surface of the clamping sleeve 3. At the same time, when the connecting sleeve 206 is pressed against the surface of the clamping sleeve 3, the clamping gap 302 gradually decreases, thereby clamping and fixing the plastic needle tube 4 to the clamping sleeve 3. When the connecting sleeve 206 covers the surface of the clamping sleeve 3 and is pressed against the limiting block 304, it ensures that the connecting sleeve 206 will not detach from the clamping sleeve 3.

[0038] Insert the fixing needle sleeve 401 into the clamping sleeve 3 so that the fixing needle sleeve 401 is fitted onto the surface of the suction catheter 103. Ensure that the limiting groove 402 on the inner wall of the fixing needle sleeve 401 is engaged with the surface of the corresponding first limiting strip 104. When the suction needle 404 is inserted into the child's ear canal and the negative pressure suction device body 1 is rotated to suction the pus, the suction needle 404 rotates synchronously with the negative pressure suction device body 1 to prevent the suction needle 404 from sliding relative to the surface of the suction catheter 103. At the same time, when the clamping sleeve 3 is clamped onto the surface of the fixing needle sleeve 401, the fixing block 303 on the inner wall of the clamping sleeve 3 engages into the annular groove 403 on the surface of the fixing needle sleeve 401, thereby clamping and fixing the fixing needle sleeve 401 to ensure that the fixing needle sleeve 401 will not fall off from the inside of the clamping sleeve 3.

[0039] like Figure 6-7As shown, a snap-fit ​​fixing mechanism 5 is fixedly installed at one end of the negative pressure suction device body 1 on the surface of the discharge conduit 101. The snap-fit ​​fixing mechanism 5 includes a mounting ring 501. Four positioning slots 502 are provided at equal angles on the surface of the mounting ring 501. Arc-shaped mounting grooves 503 are provided on one side of each of the four positioning slots 502 on the surface of the mounting ring 501. Arc-shaped sliding rods 504 are fixedly installed on the inner wall of the arc-shaped mounting grooves 503. A second moving block 505 is slidably mounted through one end of the arc-shaped sliding rod 504. A return spring 506 is provided on the surface of the arc-shaped sliding rod 504 on one side of the second moving block 505. Rotating retaining rings 507 are fixedly installed on the surfaces of the four second moving blocks 505, and the rotating retaining rings 507 are movably connected to the surface of the mounting ring 501. Four L-shaped fixing grooves 508 are provided at equal angles inside the rotating retaining rings 507, and the L-shaped fixing grooves 508 correspond to the positions of the positioning slots 502.

[0040] like Figure 8 As shown, a pus collection cylinder 6 is provided on one side of the snap-fit ​​fixing mechanism 5. Four positioning blocks 601 are fixedly installed at equal angles on one side of the pus collection cylinder 6. The positioning blocks 601 correspond to the positions of the positioning slots 502 and the L-shaped fixing slots 508. A pressure stabilizing vent hole 602 is provided on the side of the pus collection cylinder 6 away from the positioning blocks 601. An elastic plug 603 is provided inside the pressure stabilizing vent hole 602.

[0041] Twisting the rotating retaining ring 507 rotates it on the surface of the mounting ring 501, causing the second moving block 505 to slide on the corresponding arc-shaped sliding rod 504, compressing the return spring 506 until the notch of the L-shaped fixing groove 508 on the inner wall of the rotating retaining ring 507 corresponds to the position of the positioning slot 502, thus facilitating the tight mounting of the pus collection cylinder 6 against the mounting ring 501. After the pus collection cylinder 6 is secured in the appropriate position on the surface of the mounting ring 501, the rotating retaining ring 507 is released. Under the rebound action of the return spring 506, the second moving block 505 is lifted and slides on the corresponding arc-shaped sliding rod 504, causing the rotating retaining ring 507 to rotate on the surface of the mounting ring 501, thereby securing and fixing the pus collection cylinder 6, facilitating the connection, fixation, or disassembly of the pus collection cylinder 6 and the mounting ring 501.

[0042] Insert the positioning block 601 at one end of the pus collection tube 6 into the corresponding positioning slot 502, and use the rotating retaining ring 507 to lock and fix the positioning block 601 inside the positioning slot 502. Fix the pus collection tube 6 to the surface of the discharge conduit 101. Remove the elastic plug 603 inside the pressure stabilizing vent 602 and start the negative pressure suction device 1 to work. The suction needle 404 suctions the pus from the child's ear canal and discharges the suctioned pus from the discharge conduit 101 into the pus collection tube 6. At the same time, the air inside the pus collection tube 6 is discharged from the pressure stabilizing vent 602, so that the air pressure inside the pus collection tube 6 is relatively stable with the external air pressure. The air pressure inside the pus collection tube 6 will not increase due to the continuous discharge of pus into the pus collection tube 6 by the discharge conduit 101, which would compress the air inside the pus collection tube 6.

[0043] like Figure 9 As shown, the negative pressure suction device body 1 and the pus collection cylinder 6 are provided with a hand sleeve 7; one end of the inner wall of the hand sleeve 7 is provided with six limiting grooves 701 at equal angles, and the limiting grooves 701 correspond to the positions of the second limiting strips 105. An anti-slip sleeve 702 is fixedly installed on the surface of the hand sleeve 7; six second limiting strips 105 are fixedly installed at equal angles on the surface of the negative pressure suction device body 1 near the discharge conduit 101, and a first rubber retaining ring 106 is fixedly installed on the side of the negative pressure suction device body 1 located on the second limiting strips 105.

[0044] After the pus collection cylinder 6 and the negative pressure aspirator body 1 are combined and connected, the hand sleeve 7 is put on the surface of the pus collection cylinder 6 and the negative pressure aspirator body 1, so that the limiting groove 701 on the inner wall of the hand sleeve 7 is locked on the surface of the corresponding second limiting strip 105. At the same time, the hand sleeve 7 covers the surface of the first rubber retaining ring 106, and the first rubber retaining ring 106 is squeezed and deformed, so that the first rubber retaining ring 106 rebounds and locks the hand sleeve 7 in place. This makes it convenient for medical personnel to hold the anti-slip sleeve 702 and move the aspiration needle 404 at one end of the negative pressure aspirator body 1 to a suitable position for aspiration of pus.

[0045] Working principle of this invention:

[0046] The rotating retaining ring 507 is controlled to rotate on the surface of the mounting ring 501, causing the rotating retaining ring 507 to drive the second moving block 505 to slide on the surface of the arc-shaped sliding rod 504, pushing the compression return spring 506 to deform until the notch of the L-shaped fixing groove 508 corresponds to the position of the positioning slot 502. The clean pus collection tube 6 is then suspended on one side of the mounting ring 501, so that the positioning insert 601 at one end of the pus collection tube 6 corresponds to the position of the positioning slot 502. After fully inserting the positioning insert 601 into the notch of the L-shaped fixing slot 508 and the positioning slot 502, release the rotating retaining ring 507. Under the rebound action of the return spring 506, the second moving block 505 is pushed up and slides back to the surface of the arc-shaped sliding rod 504. At the same time, when the second moving block 505 slides on the surface of the arc-shaped sliding rod 504, it drives the rotating retaining ring 507 to rotate on the surface of the mounting ring 501, causing misalignment between the L-shaped fixing slot 508 and the positioning slot 502, thereby clamping and fixing the positioning insert 601 inside the positioning slot 502. Then, put the hand sleeve 7 on the surface of the pus collection cylinder 6 and the negative pressure suction device body 1, so that the limiting groove 701 covers the corresponding second limiting strip 105 on the surface of the negative pressure suction device body 1, ensuring that the hand sleeve 7 squeezes the first rubber retaining ring 106 and rebounds, clamping and fixing the hand sleeve 7 on the surface of the pus collection cylinder 6 and the negative pressure suction device body 1.

[0047] Push the connecting sleeve 206 away from the clamping sleeve 3 and move it to the surface of the mounting sleeve 201. This causes the connecting sleeve 206 to drive the first moving block 204 to slide on the surface of the mounting slide rod 203, compressing and deforming the fixing spring 205. At the same time, when the connecting sleeve 206 is removed from the surface of the clamping sleeve 3, the surface of the clamping sleeve 3 gradually opens up due to the pressure from the inner wall of the connecting sleeve 206. The fixing needle sleeve 401 is then placed inside the clamping sleeve 3, so that the fixing needle sleeve 401 is fitted onto the surface of the suction catheter 103. This ensures that the limiting groove 402 on the inner wall of the fixing needle sleeve 401 corresponds to the first limiting strip 104 covering the surface of the suction catheter 103. Once the annular groove 403 on the surface of the fixed needle sleeve 401 corresponds to the fixed block 303 on the inner wall of the clamping sleeve 3, the connecting sleeve 206 is released. Under the rebound action of the fixed spring 205, the first moving block 204 is lifted and moved to the surface of the mounting slide rod 203 to reset. This causes the connecting sleeve 206 to slide from the surface of the mounting sleeve 201 to the surface of the clamping sleeve 3, applying pressure to the surface of the clamping sleeve 3. This causes the clamping sleeve 3 to gradually shrink and compress the clamping gap 302 until the clamping sleeve 3 is clamped onto the surface of the fixed needle sleeve 401. The fixed block 303 is then engaged in the annular groove 403 on the surface of the fixed needle sleeve 401, thus clamping and fixing the fixed needle sleeve 401 inside the clamping sleeve 3.

[0048] Simultaneously, when the connecting sleeve 206 moves to the surface of the clamping sleeve 3, the inner wall of the connecting sleeve 206 deforms by squeezing the second rubber retainer 301. Under the rebound action of the second rubber retainer 301, the connecting sleeve 206 is clamped and fixed to the surface of the clamping sleeve 3, ensuring that the connecting sleeve 206 is clamped on the surface of the clamping sleeve 3 and will not slide at will. This prevents the suction needle 404 from being stimulated and struggling when it is inserted into the child's ear canal, causing the suction needle 404 to fall off the surface of the suction catheter 103.

[0049] Remove the elastic plug 603 from inside the pressure-stabilizing vent 602, then activate the negative pressure aspirator body 1 to generate suction in the suction tube 103. Insert the suction needle 404 into the child's ear canal, aiming at the pus in the ear canal. Under the suction of the suction tube 103, the pus in the ear canal is drawn from the suction needle 404 into the negative pressure aspirator body 1. Then, the pus is discharged from the discharge tube 101 to the pus collection cylinder 6. Control the negative pressure aspirator body 1 to drive the suction needle 404 to rotate, thereby aspirating pus from different locations in the child's ear canal. Once the pus collection cylinder 6 is full of a certain amount of pus, withdraw the suction needle 404 from the ear canal and move the elastic plug 603 to block the pressure-stabilizing vent 602.

[0050] Simultaneously, the rotating retaining ring 507 is rotated on the surface of the mounting ring 501, aligning the notch of the L-shaped fixing groove 508 with the position of the positioning slot 502. This allows the positioning insert 601 to be pulled out from inside the positioning slot 502, moving the pus collection cylinder 6 away from the mounting ring 501. This facilitates emptying and cleaning of the pus collection cylinder 6, preventing leakage caused by continued suction after the cylinder is full of pus. Simultaneously, the connecting sleeve 206 is pushed away from the clamping sleeve 3, causing it to open on the surface of the fixing needle sleeve 401 until the fixing block 303 disengages from the annular groove 403. The fixing needle sleeve 401 is then pulled out from inside the clamping sleeve 3 for replacement, preventing cross-infection when the suction needle 404 is reused to suction pus from different patients' ear canals.

Claims

1. A suction device for treating otitis media in children, comprising a negative pressure suction device body (1), characterized in that: One end of the negative pressure suction device body (1) is connected to a discharge conduit (101). A snap-fit ​​fixing mechanism (5) is fixedly installed at one end of the negative pressure suction device body (1) on the surface of the discharge conduit (101). A pus collection cylinder (6) is provided on one side of the snap-fit ​​fixing mechanism (5). A connecting conduit (102) is fixedly installed at one end of the negative pressure suction device body (1) away from the discharge conduit (101). A connecting fixing mechanism (2) is fixedly connected to the surface of the connecting conduit (102). A suction conduit (103) is connected at one end of the connecting conduit (102) on the surface of the suction conduit (103). A clamping sleeve (3) is fixedly installed at one end of the connecting conduit (102) on the surface of the suction conduit (103). A plastic needle tube (4) is provided on the surface of the suction conduit (103) inside the clamping sleeve (3). A hand sleeve (7) is provided on the surface of the negative pressure suction device body (1) and the pus collection cylinder (6). The connecting and fixing mechanism (2) includes an installation sleeve (201). The surface of the installation sleeve (201) is provided with six strip-shaped installation grooves (202) at equal angles. An installation slide rod (203) is fixedly installed inside the strip-shaped installation grooves (202). A first moving block (204) is slidably installed on the surface of the installation slide rod (203). A connecting sleeve (206) is fixedly installed on the surface of the six first moving blocks (204), and the connecting sleeve (206) is slidably connected to the surface of the installation sleeve (201). A fixing spring (205) is provided on the surface of the installation slide rod (203) located on one side of the first moving block (204). The surface of the clamping sleeve (3) corresponds to the inner wall of the connecting sleeve (206). A second rubber retaining ring (301) is fixedly installed on the surface of one end of the clamping sleeve (3). Six clamping gaps (302) are provided at equal angles on the surface of the clamping sleeve (3) away from the second rubber retaining ring (301). A fixing block (303) is fixedly installed on the inner wall of the clamping sleeve (3) between two adjacent clamping gaps (302). Six limiting blocks (304) are fixedly installed on one end of the clamping sleeve (3). The plastic needle tube (4) includes a fixed needle sleeve (401), the inner wall of the fixed needle sleeve (401) is provided with four limiting slots (402) at equal angles, the surface of the fixed needle sleeve (401) is provided with an annular slot (403), the annular slot (403) corresponds to the position of the fixed block (303), and a suction needle (404) is connected to one side of the fixed needle sleeve (401). Four first limiting strips (104) are fixedly installed at equal angles on the surface of the suction conduit (103). The first limiting strips (104) are in the same position and have the same shape as the limiting groove (402). Six second limiting strips (105) are fixedly installed at equal angles on the surface of the negative pressure suction device body (1) near the discharge conduit (101). A first rubber retaining ring (106) is fixedly installed on the side of the negative pressure suction device body (1) located on the second limiting strip (105). The snap-fit ​​fixing mechanism (5) includes a mounting ring (501). The mounting ring (501) has four positioning slots (502) at equal angles on its surface. The mounting ring (501) has arc-shaped mounting grooves (503) on one side of each of the four positioning slots (502). An arc-shaped sliding rod (504) is fixedly installed on the inner wall of the arc-shaped mounting groove (503). A second moving block (505) is slidably installed on the surface of one end of the arc-shaped sliding rod (504). The surface of the arc-shaped sliding rod (504) located on one side of the second moving block (505) is provided with a return spring (506). Rotating retaining rings (507) are fixedly installed on the surfaces of the four second moving blocks (505), and the rotating retaining rings (507) are movably connected to the surface of the mounting ring (501). The rotating retaining rings (507) are provided with four L-shaped fixing slots (508) at equal angles inside, and the L-shaped fixing slots (508) correspond to the positions of the positioning slots (502). Four positioning blocks (601) are fixedly installed at equal angles on one side of the pus collection cylinder (6), and the positioning blocks (601) correspond to the positioning slots (502) and the L-shaped fixing slots (508). A pressure stabilizing vent (602) is provided on the side of the pus collection cylinder (6) away from the positioning blocks (601), and an elastic plug (603) is provided inside the pressure stabilizing vent (602).

2. The suction device for treating otitis media in children according to claim 1, characterized in that: The inner wall of the hand sleeve (7) is provided with six limiting grooves (701) at equal angles at one end, and the limiting grooves (701) correspond to the positions of the second limiting strip (105). The surface of the hand sleeve (7) is fixedly installed with an anti-slip sleeve (702).

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