Negative pressure suction collection device

Abstract

The application relates to the field of medical devices and discloses a negative pressure suction collecting device which comprises a suction pipe, a buckle joint fixedly connected to one side of the suction pipe, and a collecting mechanism arranged on one side of the suction pipe. The collecting mechanism comprises a collecting tank in a negative pressure state, a connecting pipe fixedly communicated with one side of the collecting tank corresponding to the suction pipe, and the end of the connecting pipe is screw-connected with the buckle joint. The end of the suction pipe is inserted into the uterine cavity of a patient, then a negative pressure difference in the tank is continuously formed by the collecting tank in the negative pressure state, so that the tissues and liquid in the uterine cavity enter the collecting tank through the suction pipe and are directly discharged into the inside of a filter cartridge through the connecting pipe. After being filtered by the filter cartridge, the tissues are intercepted by the filter cartridge, and the liquid penetrates through the filter cartridge and is located in the collecting tank. Therefore, the collected tissues are solid-liquid separated, and the liquid and the solid part can be independently detected during subsequent inspection.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a collection device for negative pressure suction. Background Technology

[0002] The uterine vacuum aspiration device is a commonly used instrument in gynecological uterine surgery, primarily used for procedures such as induced abortion, diagnostic curettage, and removal of uterine polyps. The device uses negative pressure to suction out embryonic tissue, endometrial lesions, and irrigation waste fluid from the uterine cavity for examination. Pathological testing is then used to determine the nature of the lesions and confirm the completeness of the uterine cavity cleanup. Currently, the mainstream negative pressure aspiration collection devices on the market are divided into two types: externally electrically controlled negative pressure type and manually operated piston negative pressure type. Both types of devices are equipped with independent collection tanks and filtration structures to separate solid tissue and liquid waste fluid.

[0003] Existing negative pressure collection devices use a single collection container, resulting in solid tissue and liquid being collected together in the same container. However, during testing, the solid tissue and liquid portions need to be analyzed separately. The existing collection container lacks an independent storage structure, requiring manual sorting and separation of the two types of samples after aspiration, making the process cumbersome. Prolonged immersion of tissue in the container's accumulated liquid can easily lead to cell autolysis, altering the original cell morphology and interfering with pathological observation and interpretation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a collection device for negative pressure suction, which solves the problem that conventional negative pressure collection containers do not have solid-liquid separation capabilities.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a collection device for negative pressure suction, comprising a suction tube, a one-way valve on the outside of the suction tube, a snap-fit ​​connector fixedly connected to one side of the suction tube, and a collection mechanism on one side of the suction tube. The collection mechanism includes a collection tank under negative pressure, a connecting pipe fixedly connected to one side of the collection tank corresponding to the suction tube, and the end of the connecting pipe being threadedly connected to the snap-fit ​​connector. A tank cover is threadedly connected to the top of the collection tank, and a filter cylinder is provided inside the collection tank. A through hole with a cross-sectional size adapted to the connecting pipe is provided on one side of the filter cylinder corresponding to the connecting pipe.

[0006] Preferably, a guide block is fixedly connected to the front side of the filter cartridge, and a matching guide groove is provided at the corresponding position inside the collection tank.

[0007] Preferably, a manual negative pressure mechanism is provided on one side of the collection tank. The manual negative pressure mechanism includes a connecting pipe that is fixedly connected to the collection tank. A sliding pipe is fixedly connected to one side of the connecting pipe. A sliding rod is provided inside the sliding pipe. A piston is provided at the end of the sliding rod near the connecting pipe. The piston is slidably connected to the connecting pipe, and a sealing ring is fixedly installed on the outside of the piston. A waste liquid pipe is fixedly connected to the bottom of the connecting pipe.

[0008] Preferably, a handle is fixedly connected to the outside of the connecting tube.

[0009] Preferably, a handle is fixedly connected to one side of the sliding rod, and a connecting ring is fixedly connected to the other side of the handle. The connecting ring is slidably connected to the outside of the sliding tube. A return spring is fixedly connected to a protruding part on one side of the sliding rod, and the other side of the return spring is fixedly connected to the inside of the sliding tube.

[0010] Preferably, limit grooves are provided on both sides of the connecting ring, and limit blocks are slidably connected inside the two limit grooves, with the inner side of the limit blocks fixedly connected to the sliding tube.

[0011] Preferably, an electrically controlled negative pressure mechanism is provided on one side of the suction tube. The electrically controlled negative pressure mechanism includes a negative pressure generator. The input end of the negative pressure generator is fixedly connected to a first hose. The other end of the first hose is connected to a filter. The other end of the filter is fixedly connected to a collection bottle through a pipe and a quick-release connector. A bottle cap is threadedly connected to the top of the collection bottle. A connecting pipe is fixedly connected to one side of the collection bottle. The other side of the connecting pipe is fixedly connected to a second hose through a connector. The other end of the second hose is threadedly connected to a snap-fit ​​connector at the end of the suction tube.

[0012] Preferably, the collection bottle is provided with a filter cylinder two inside, a fixing ring is fixedly connected to the top of the filter cylinder two, and L-shaped blocks are respectively provided on both sides of the fixing ring. The fixing ring is slidably connected to the vertical part of the L-shaped block, and the outer side of the L-shaped block is fixedly connected to the inner wall of the collection bottle. A through groove is opened on one side of the filter cylinder two corresponding to the hose two. A pipe guiding assembly is provided inside the collection bottle.

[0013] Preferably, the pipe guiding assembly includes a folded pipe fixedly connected to the inside of the connecting pipe, a sliding ring fixedly connected to one side of the folded pipe, a fixing plate fixedly connected to the outside of the sliding ring, a triangular plate fixedly connected to one side of the fixing plate, a support spring fixedly connected to one side of the fixing plate, and the other side of the support spring fixedly connected to the inner wall of the collection bottle; a guide block arranged horizontally is fixedly connected to one side of the collection bottle, the guide block passes through the fixing plate and is slidably connected to the fixing plate.

[0014] Preferably, the set square is an isosceles triangle.

[0015] This invention provides a collection device for negative pressure suction. It has the following beneficial effects: 1. This invention involves inserting the end of a suction tube into the patient's uterine cavity. A negative pressure differential is continuously created within the collection container, causing tissue and fluid within the uterine cavity to pass through the suction tube into the collection container. The fluid is then directly discharged into a filter cartridge through a connecting tube. After filtration by the filter cartridge, the tissue is retained, while the fluid passes through and remains in the collection container. This achieves solid-liquid separation of the collected tissue, facilitating independent testing of the liquid and solid components during subsequent analysis.

[0016] 2. In this invention, after the suction tube is inserted into the uterine cavity, a negative pressure generator is activated by an external power source and adjusted to a suitable negative pressure. The negative pressure generator continuously extracts air from the collection bottle, creating a stable negative pressure inside. The pressure difference then continuously draws fluid and tissue from the uterine cavity into the collection bottle. The electrically controlled negative pressure mechanism continuously supplies a stable negative pressure, and the negative pressure value can be continuously adjusted and maintained at a constant suction force for an extended period. This allows for a larger total volume of fluid and tissue to be extracted in a single operation. While the overall device is larger and requires a power outlet, it is suitable for routine uterine surgeries in hospital operating rooms and outpatient gynecology departments, meeting the operational needs for long-term, high-flow-rate continuous suction.

[0017] 3. When the second filter cartridge is installed, the inclined surface of the triangular plate of the second filter cartridge contacts the filter cartridge. The contact force causes the triangular plate and the fixing plate to move to the right, forming an avoidance action. This compresses the support spring and simultaneously folds the tube until the fixing plate aligns with the through slot. Then, the support spring rebounds, causing the left end of the fixing plate to insert into the second filter cartridge through the through slot. When the second filter cartridge is removed, lifting it upwards causes the through slot to contact the inclined surface of the triangular plate, generating a rightward component force. This pushes the triangular plate and the fixing plate to move to the right again, compressing the support spring. The folding tube retracts simultaneously, releasing the insertion and connection between the fixing plate and the second filter cartridge, allowing the second filter cartridge to be removed upwards. This achieves the effect of convenient installation and connection of the filter cartridge with the pipeline. Attached Figure Description

[0018] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a schematic diagram showing the separation of the collection mechanism of the present invention; Figure 3 This is a cross-sectional schematic diagram of the collection mechanism of the present invention; Figure 4 This is a schematic diagram showing the separation of the manual negative pressure mechanism of the present invention; Figure 5 This is a schematic diagram of the electrically controlled negative pressure mechanism of the present invention; Figure 6 This is a schematic diagram showing the separation of the electrically controlled negative pressure mechanism of the present invention; Figure 7 This is a schematic cross-sectional view of the collection bottle of the present invention; Figure 8 This invention is for Figure 7Enlarged schematic diagram of the structure at point A in the middle.

[0019] Among them, 10. Suction tube; 12. Snap-fit ​​connector; 20. Collection mechanism; 201. Collection tank; 202. Tank cover; 203. Connecting pipe; 204. Filter cartridge one; 205. Through hole; 209. Guide block; 30. Manual negative pressure mechanism; 301. Connecting pipe; 302. Sliding pipe; 303. Pull handle; 304. Sliding rod; 305. Sealing ring; 306. Return spring; 307. Waste liquid pipe; 308. Limiting groove; 309. Limiting... 310. Handle; 311. Waterproof and breathable membrane; 40. Electrically controlled negative pressure mechanism; 401. Negative pressure generator; 402. Hoses I; 403. Filter; 404. Collection bottle; 405. Hoses II; 406. Filter cartridge II; 407. L-shaped block; 408. Through groove; 409. Bottle cap; 410. Connecting pipe; 411. Folded tube; 412. Fixing plate; 413. Guide block; 414. Support spring; 415. Triangular plate. Detailed Implementation

[0020] The technical solutions in 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.

[0021] Please see the appendix Figure 1 -Appendix Figure 4 This invention provides a negative pressure suction collection device, including a suction tube 10. A snap-fit ​​connector 12 is fixedly connected to the left end of the suction tube 10. A collection mechanism 20 is provided on the left side of the suction tube 10. The collection mechanism 20 includes a collection tank 201 under negative pressure. A connecting tube 203 is fixedly connected to the right side of the collection tank 201. The end of the connecting tube 203 is threadedly connected to the snap-fit ​​connector 12. A tank cover 202 is threadedly connected to the top of the collection tank 201. A filter cylinder 204 is provided inside the collection tank 201. A through hole 205 with a cross-sectional size adapted to the connecting tube 203 is opened on the right side of the filter cylinder 204.

[0022] In use, the end of the suction tube 10 is inserted into the patient's uterine cavity. A negative pressure differential is continuously created within the collection container 201, causing tissue and fluid from the uterine cavity to pass through the suction tube 10 into the collection container 201. The fluid is then directly discharged into the filter cartridge 204 via the connecting tube 203. After filtration by the filter cartridge 204, the tissue is retained, while the fluid passes through and remains within the collection container 201. This achieves solid-liquid separation of the collected tissue, facilitating the subsequent removal of the filter cartridge 204 for testing of the solid portion.

[0023] refer to Figure 2 Preferably, a guide block 209 is fixedly connected to the front side of the filter cartridge 204, and a matching guide groove is provided inside the collection tank 201 at a corresponding position. In use, the filter cartridge 204 is vertically lowered into the collection tank 201 along the guide groove, ensuring that the through hole 205 is tightly fitted to the inner surface of the connecting pipe 203 after installation. Thus, liquids and solids discharged through the connecting pipe 203 will first flow into the filter cartridge 204 through the through hole 205.

[0024] refer to Figure 2 , Figure 3 , Figure 4 A manual negative pressure mechanism 30 is provided on the left side of the collection tank 201. The manual negative pressure mechanism 30 includes a connecting pipe 301 that is fixedly connected to the collection tank 201. A sliding pipe 302 is fixedly connected to the left side of the connecting pipe 301. A sliding rod 304 is provided inside the sliding pipe 302. A piston is provided at the right end of the sliding rod 304. The piston is slidably connected to the connecting pipe 301, and a sealing ring 305 is fixedly installed on the outside of the piston. A waste liquid pipe 307 is fixedly connected to the bottom of the connecting pipe 301. A collection container is connected to the bottom end of the waste liquid pipe 307. In the initial state, the piston blocks the top of the waste liquid pipe 307, so that the waste liquid pipe 307 is closed.

[0025] refer to Figure 3 Preferably, a handle 310 is fixedly connected to the outside of the connecting tube 301, which makes it easy for the operator to hold the whole device for operation.

[0026] refer to Figure 4 Furthermore, a handle 303 is fixedly connected to the left side of the sliding rod 304, and a connecting ring is fixedly connected to the right side of the handle 303. The connecting ring is slidably connected to the outside of the sliding tube 302. A return spring 306 is fixedly connected to the protruding part on the left side of the sliding rod 304, and the other side of the return spring 306 is fixedly connected to the inside of the sliding tube 302.

[0027] When the sliding rod 304 moves to the right and drives the piston to perform a negative pressure action, it will cause the return spring 306 to deform. After the handle 303 is released, the stretched return spring 306 will pull the sliding rod 304 and the piston to the left by its own elastic force, and the negative pressure state inside the tank will be released simultaneously.

[0028] In the complete usage process, insert the end of the suction tube 10 into the patient's uterine cavity. Hold the handle 310 to stabilize the entire device, and pull the handle 303 to the right. This will cause the sliding rod 304 and piston to move to the right in sync. The piston will move away from the position above the waste liquid tube 307. Air inside the collection tank 201 will be guided into the connecting tube 301 to form a negative pressure. This will allow the tissue fluid in the uterine cavity to flow along the suction tube 10 and connecting tube 203 through the through hole 205 into the filter cartridge 204. The fluid will also flow into the connecting tube 203. When the piston is no longer blocking the waste liquid tube 207, the fluid will flow along the waste liquid tube 307 into the independent collection container, achieving the effect of waste liquid collection. After the suction operation is completed, release the handle 303. The return spring 306 will pull the sliding rod 304 and piston to the left to reset and block the waste liquid tube 307. The negative pressure inside the collection tank 201 will disappear. Unscrew the top cap 202 of the collection tank 201 and drain the fluid along the top cap 202 of the collection tank 201. The internal guide groove is used to pull the filter cartridge 204 upwards, and the guide block 209 slides out along the guide groove. The filter cartridge 204 is then removed to separate and retain the tissue.

[0029] The manual negative pressure mechanism 30 relies on manual pulling of the piston to create negative pressure, without the need for an external power source. The overall device is smaller and easier to carry. The negative pressure suction is controlled by the stroke of the hand pulling. The negative pressure capacity generated by a single pull is limited, making it suitable for single small-volume uterine cavity extraction operations. It is mostly used in primary clinics without stable power supply, outpatient surgeries, and emergency temporary treatment scenarios.

[0030] refer to Figure 4 Preferably, limiting grooves 308 are formed on both the front and rear sides of the connecting ring, and limiting blocks 309 are slidably connected in the two limiting grooves 308. The inner side of the limiting block 309 is fixedly connected to the sliding tube 302. The limiting block 309, in conjunction with the limiting groove 308, restricts the left and right sliding stroke of the sliding rod 304, preventing the sliding rod 304 from completely disengaging from the sliding tube 302, and at the same time constrains the sliding rod 304 to move in the horizontal direction, preventing the piston from shifting and causing air leakage.

[0031] Another option, refer to Figure 5 , Figure 6 An electrically controlled negative pressure mechanism 40 is provided on the left side of the suction tube 10. The electrically controlled negative pressure mechanism 40 includes a negative pressure generator 401. The input end of the negative pressure generator 401 is fixedly connected to a hose 402. The other end of the hose 402 is connected to a filter 403. The other end of the filter 403 is fixedly connected to a collection bottle 404 through a pipe and a quick-release connector. A bottle cap 409 is threadedly connected to the top of the collection bottle 404. A connecting pipe 410 is fixedly connected to the right side of the collection bottle 404. A hose 405 is fixedly connected to the right side of the connecting pipe 410 through a connector. The other end of the hose 405 is threadedly connected to the snap-fit ​​connector 12 at the end of the suction tube 10.

[0032] After the suction tube 10 is inserted into the uterine cavity, the negative pressure generator 401 is activated by an external power source and adjusted to a suitable negative pressure. The negative pressure generator 401 continuously draws air from the inside of the collection bottle 404, creating a stable negative pressure inside the collection bottle 404. Relying on the air pressure difference, the fluid and tissue in the uterine cavity are continuously drawn into the collection bottle 404. The electrically controlled negative pressure mechanism 40 continuously supplies a stable negative pressure. The negative pressure value can be continuously adjusted and a constant suction force can be maintained for a long time. The total amount of fluid and tissue that can be extracted in a single operation is larger. Although the overall size of the device is larger and it requires a power outlet, it is suitable for routine uterine cavity surgeries in hospital operating rooms and outpatient gynecology departments, and can meet the operational needs of long-term, high-flow continuous suction.

[0033] refer to Figure 6 Furthermore, a filter cylinder 406 is installed inside the collection bottle 404. A fixing ring is fixedly connected to the top of the filter cylinder 406. L-shaped blocks 407 are respectively installed on the front and rear sides of the fixing ring. The fixing ring is slidably connected to the vertical part of the L-shaped block 407. The outer side of the L-shaped block 407 is fixedly connected to the inner wall of the collection bottle 404. A through groove 408 is opened on the right side of the filter cylinder 406. A pipe guide assembly is installed on the right side of the inside of the collection bottle 404.

[0034] When installing filter cartridge 2 406, slide the retaining ring groove along the vertical part of the corresponding L-shaped block 407 until the retaining ring abuts against the horizontal part of the L-shaped block 407. At this time, the through groove 408 of filter cartridge 2 406 is aligned with the corresponding position of the pipe guide assembly. Finally, tighten the bottle cap 409 to seal the top of the collection bottle 404 and the bottom of the bottle cap 409 abuts against the retaining ring, thereby achieving the effect of positioning filter cartridge 2 406 and aligning the pipe guide assembly with the through groove 408.

[0035] refer to Figure 7 , Figure 8 The pipeline guiding assembly includes a folded tube 411 fixedly connected to the inside of the connecting pipe 410. A sliding ring is fixedly connected to the left side of the folded tube 411, and a fixing plate 412 is fixedly connected to the outside of the sliding ring. A triangular plate 415 is fixedly connected to the left side of the fixing plate 412. The triangular plate 415 is an isosceles triangle with hypotenuses on the top and bottom sides. A support spring 414 is fixedly connected to the right side of the fixing plate 412. The other side of the support spring 414 is fixedly connected to the inner wall of the collection bottle 404.

[0036] refer to Figure 8 Preferably, a horizontally arranged guide block 413 is fixedly connected to the left side of the collection bottle 404. The guide block 413 passes through the fixing piece 412 and is slidably connected to the fixing piece 412. The guide block 413 restricts the fixing piece 412 to move only horizontally, preventing the fixing piece 412 from shifting vertically and ensuring that the triangular plate 415 and the filter cylinder 406 are accurately aligned.

[0037] When filter cartridge 406 is installed, its bottom contacts the inclined surface of triangular plate 415. The contact force causes triangular plate 415 and fixing plate 412 to move to the right, creating a clearance action. This compresses support spring 414 and simultaneously folds folding tube 411 until fixing plate 412 aligns with through groove 408. Then, support spring 414 rebounds, causing the left end of fixing plate 412 to insert into filter cartridge 406 through through groove 408. When filter cartridge 406 is removed, lifting it upwards causes through groove 408 to contact the inclined surface of triangular plate 415, generating a rightward force that pushes triangular plate 415 and fixing plate 412 to move to the right again, compressing support spring 414. Folding tube 411 retracts simultaneously, releasing the insertion of fixing plate 412 into filter cartridge 406, allowing filter cartridge 406 to be removed upwards.

[0038] The aforementioned filter cartridge 204 uses a through-hole 205 to connect with the pipe, which makes it prone to bumping the pipe joint during insertion, resulting in significant resistance during handling. In contrast, the avoidance insertion type connection structure allows the pipe to be directly inserted into the filter cartridge 406. The pipe automatically retracts due to the inclined surface, allowing the joint to avoid the cartridge body during lowering or lifting, eliminating the need for manual alignment. After insertion, the spring rebound ensures connection between the pipe and the filter cartridge, resulting in a more stable pipe connection seal. This avoidance insertion structure is suitable for high-frequency outpatient hysteroscopic surgeries, where the filter cartridge needs to be quickly removed after a single procedure to collect tissue samples for testing. The cartridge replacement and device reset can be completed in a short time. Furthermore, the overall structure is compact and compatible with small, portable, electrically controlled negative pressure collection devices.

[0039] Based on the above technical solution, this embodiment of the invention also provides a working principle for a negative pressure suction collection device, comprising the following steps: The end of the suction tube 10 is inserted into the patient's uterine cavity. Then, a negative pressure difference is continuously formed within the collection tank 201 under negative pressure, causing tissue and fluid in the uterine cavity to enter the collection tank 201 through the suction tube 10. The fluid is then directly discharged into the filter cartridge 204 through the connecting tube 203. After filtration by the filter cartridge 204, the tissue portion is retained, while the liquid passes through the filter cartridge 204 and remains within the collection tank 201. After negative pressure suction is completed, the valve 208 is opened, allowing the liquid in the collection tank 201 to enter the receiving bottle 207 through the discharge tube 206. This prevents excessive liquid from soaking the tissue in the filter cartridge 204, reducing cell morphological changes caused by prolonged immersion of the tissue specimen in liquid. This achieves solid-liquid separation of the collected tissue, facilitating independent testing of the liquid and solid components during subsequent sample submission.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A collection device for negative pressure suction, characterized in that, include: A suction tube (10) is fixedly connected to a snap-fit ​​connector (12) on one side. A collection mechanism (20) is provided on one side of the suction tube (10). The collection mechanism (20) includes a collection tank (201) under negative pressure. A connecting tube (203) is fixedly connected to one side of the suction tube (10) of the collection tank (201). The end of the connecting tube (203) is threadedly connected to the snap-fit ​​connector (12). A tank cover (202) is threadedly connected to the top of the collection tank (201). A filter cylinder (204) is provided inside the collection tank (201). A through hole (205) with a cross-sectional size that matches the connecting tube (203) is opened on one side of the filter cylinder (204).

2. The negative pressure suction collection device according to claim 1, characterized in that, A guide block (209) is fixedly connected to the front side of the filter cartridge (204), and a matching guide groove is provided in the corresponding position inside the collection tank (201).

3. The negative pressure suction collection device according to claim 2, characterized in that, A manual negative pressure mechanism (30) is provided on one side of the collection tank (201). The manual negative pressure mechanism (30) includes a connecting pipe (301) that is fixedly connected to the collection tank (201). A sliding pipe (302) is fixedly connected to one side of the connecting pipe (301). A sliding rod (304) is provided inside the sliding pipe (302). A piston is provided at the end of the sliding rod (304) near the connecting pipe (301). The piston is slidably connected to the connecting pipe (301), and a sealing ring (305) is fixedly installed on the outside of the piston. A waste liquid pipe (307) is fixedly connected to the bottom of the connecting pipe (301).

4. A collection device for negative pressure suction according to claim 3, characterized in that, A handle (310) is fixedly connected to the outside of the connecting tube (301).

5. A collection device for negative pressure suction according to claim 4, characterized in that, A handle (303) is fixedly connected to one side of the sliding rod (304), and a connecting ring is fixedly connected to the other side of the handle (303). The connecting ring is slidably connected to the outside of the sliding tube (302). A return spring (306) is fixedly connected to the protruding part on one side of the sliding rod (304), and the other side of the return spring (306) is fixedly connected to the inside of the sliding tube (302).

6. A collection device for negative pressure suction according to claim 5, characterized in that, Limiting grooves (308) are opened on both sides of the connecting ring, and limiting blocks (309) are slidably connected inside the two limiting grooves (308). The inner side of the limiting block (309) is fixedly connected to the sliding tube (302).

7. A collection device for negative pressure suction according to claim 6, characterized in that, An electrically controlled negative pressure mechanism (40) is provided on one side of the suction tube (10). The electrically controlled negative pressure mechanism (40) includes a negative pressure generator (401). The input end of the negative pressure generator (401) is fixedly connected to a hose one (402). The other end of the hose one (402) is connected to a filter (403). The other end of the filter (403) is fixedly connected to a collection bottle (404) through a pipe and a quick-release connector. The top of the collection bottle (404) is threadedly connected to a bottle cap (409). A connecting pipe (410) is fixedly connected to one side of the collection bottle (404). The other side of the connecting pipe (410) is fixedly connected to a hose two (405) through a connector. The other end of the hose two (405) is threadedly connected to the snap connector (12) at the end of the suction tube (10).

8. A collection device for negative pressure suction according to claim 7, characterized in that, The collection bottle (404) is equipped with a filter cylinder two (406) inside. A fixing ring is fixedly connected to the top of the filter cylinder two (406). L-shaped blocks (407) are respectively provided on both sides of the fixing ring. The fixing ring is slidably connected to the vertical part of the L-shaped block (407). The outer side of the L-shaped block (407) is fixedly connected to the inner wall of the collection bottle (404). A through groove (408) is opened on one side of the corresponding hose two (405) of the filter cylinder two (406). A pipeline guide assembly is provided inside the collection bottle (404).

9. A collection device for negative pressure suction according to claim 8, characterized in that, The pipeline guiding assembly includes a folded pipe (411) fixedly connected to the inside of the connecting pipe (410), a sliding ring fixedly connected to one side of the folded pipe (411), a fixing plate (412) fixedly connected to the outside of the sliding ring, a triangular plate (415) fixedly connected to one side of the fixing plate (412), a support spring (414) fixedly connected to one side of the fixing plate (412), and the other side of the support spring (414) fixedly connected to the inner wall of the collection bottle (404); a guide block (413) arranged horizontally fixedly connected to one side of the collection bottle (404), the guide block (413) passing through the fixing plate (412) and slidably connected to the fixing plate (412).

10. A collection device for negative pressure suction according to claim 9, characterized in that, The triangle (415) is an isosceles triangle.

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