An auxiliary device for medical catheter coating

Abstract

The application relates to an auxiliary device for medical catheter gluing, and relates to the technical field of medical product assembly. The device comprises a synchronous transmission mechanism and a synchronous gluing mechanism. A gluing hole is arranged on a gluing seat. A sliding rod is arranged in a gluing shaft in a sliding mode. A sealing head is arranged on the sliding rod. A first elastic element is arranged in the gluing shaft and used for providing a pre-tightening force of the sealing head tending to block the gluing hole. A sealing mechanism is arranged on a glue box. The sealing mechanism comprises a fixing sleeve, a supporting seat, a clamping block and a driving assembly. The application realizes initial blocking of the gluing hole through the abutting of the slidable sealing head and the gluing hole. When the catheter is inserted, the sealing head is pushed to slide and the gluing hole is opened. When the catheter is not inserted, the position of the sealing head in the gluing hole is unchanged. Meanwhile, the clamping block is driven by the driving assembly to be closed to clamp and seal the outer wall of the catheter body, so that the technical effects of automatic leakage prevention when the catheter is not inserted and no damage to the glue layer when the catheter is withdrawn are achieved, and the gluing quality and production efficiency are provided.

Description

Technical Field

[0001] This application relates to the technical field of medical product assembly, and in particular to an auxiliary device for applying adhesive to medical catheters. Background Technology

[0002] Medical catheters are tubular instruments used in the medical field to achieve functions such as drainage and drug delivery. Medical catheters can be divided into various types according to their functions, such as cardiovascular catheters, neurovascular catheters, venous catheters, and urological catheters. Medical catheters are widely used in hospitals and clinics for airway management, nutritional support, urination, intravenous infusion and blood transfusion, as well as monitoring and treatment. Medical catheters are usually coated with adhesive at the end and assembled with a stopcock or Luer connector.

[0003] Chinese patent CN119408172A discloses a catheter coating structure for automated equipment assembly in the field of medical consumables. The structure uses a cylinder of a sliding adjustment mechanism to push a transmission plate, which in turn moves a gear drive mechanism, a synchronous transmission mechanism, and a synchronous coating mechanism forward, allowing the catheter body to be inserted into the coating hole of the coating seat. Subsequently, the gear drive mechanism drives the coating shaft and the dispensing shaft to rotate in opposite directions through the transmission gear and the synchronous gear. The coating shaft drives the coating seat to rotate, uniformly coating the catheter surface with adhesive through the guide hole. At the same time, the dispensing shaft further disperses the adhesive through the centrifugal force of the dispensing plate, improving the uniformity and efficiency of coating. The adhesive level sensor monitors the amount of adhesive in real time to achieve automatic adhesive replenishment.

[0004] However, in actual production, the following problems often occur due to incorrect insertion of the guide tube or material shortage at certain workstations:

[0005] 1. When the tube body is not inserted, glue leaks from the coating hole, which leads to glue waste, equipment contamination, and even affects the coating quality of other stations;

[0006] 2. When the catheter body is withdrawn after being coated with adhesive, the adhesive layer on the catheter body is scraped off. In order to prevent the internal adhesive from escaping, the gap between the outermost side of the outer wall of the catheter body and the outermost side of the adhesive hole is small, so the adhesive layer on the catheter body is easily scraped off when it is withdrawn.

[0007] Therefore, there is an urgent need to design an auxiliary device that can automatically prevent leakage when the catheter is not inserted, and does not damage the adhesive layer when withdrawing, and can be used for coating medical catheters. Summary of the Invention

[0008] In order to automatically prevent leakage when the catheter is not inserted and to avoid damage to the adhesive layer when withdrawing, this application provides an auxiliary device for applying adhesive to medical catheters.

[0009] This application provides an auxiliary device for applying adhesive to medical catheters, which adopts the following technical solution:

[0010] An auxiliary device for applying adhesive to medical catheters includes a synchronous transmission mechanism and a synchronous adhesive application mechanism. The synchronous adhesive application mechanism includes an adhesive container, multiple adhesive application seats, and an adhesive application shaft. Each adhesive application seat has an adhesive application hole on its front end face. A sliding groove is formed within the adhesive application shaft. A sliding rod is slidably disposed within the sliding groove along the axis of the adhesive application shaft. The sliding rod is rotatable relative to the sliding groove. A sealing head for sealing the adhesive application hole is provided at the front end of the sliding rod. A first elastic element is provided within the sliding groove, providing a pre-tightening force for the sealing head to seal the adhesive application hole. After the catheter body is inserted into the adhesive application hole, it presses against the sealing head and pushes the sealing head to slide towards the bottom of the sliding groove. The adhesive container is provided with a sealing mechanism for sealing the gap between the catheter body and the adhesive application hole. The sealing mechanism includes:

[0011] A fixing sleeve is provided on the side of the adhesive box near the adhesive application hole;

[0012] A support base, which is slidably disposed within a fixed sleeve and is used to support the non-adhesive-coated area at the bottom of the catheter body;

[0013] Clamping blocks, two sets of clamping blocks are slidably disposed on a section of the fixing sleeve near the glue application hole along the direction of mutual approach or distance; when the two sets of clamping blocks are close to each other, they clamp and seal the catheter body.

[0014] A drive assembly is mounted on a fixed sleeve, and the clamping block is controlled to slide by the drive assembly when the support seat slides.

[0015] By adopting the above technical solution, the sliding sealing head abuts against the adhesive application hole to achieve initial sealing of the adhesive application hole. When the catheter is inserted, the sealing head is pushed to slide and open the adhesive application hole. The position of the sealing head in the adhesive application hole where the catheter is not inserted remains unchanged. At the same time, the displacement of the support seat drives the clamping block to close through the drive assembly, clamping and sealing the outer wall of the catheter body or the side wall of the sealing head. This achieves automatic leakage prevention when the catheter body is not inserted, opening the adhesive application hole after insertion, and releasing the clamping block before the catheter body when withdrawing. This achieves the technical effect of automatic leakage prevention when the catheter is not inserted and no damage to the adhesive layer when withdrawing, improving the adhesive application quality and production efficiency.

[0016] Furthermore, the driving component is used to simultaneously drive multiple sets of clamping blocks to slide, and the driving component includes:

[0017] A sliding block, wherein the sliding block is slidably disposed within the fixed sleeve along the sliding direction of the support base;

[0018] The connecting crossbars are arranged in two sets and are slidably disposed in the fixed sleeve along the direction of mutual approach or mutual distance. Multiple sets of symmetrically arranged clamping blocks are arranged at intervals on the opposite side of the two sets of connecting crossbars.

[0019] The connecting rods are hinged to the sliding block, and the other ends of the two sets of connecting rods are respectively hinged to the two sets of connecting crossbars. When the sliding block slides, the two sets of connecting rods drive the two sets of connecting crossbars to move closer or further apart from each other.

[0020] The second elastic element is disposed in the fixed sleeve and provides a pre-tightening force to move the sliding block away from the glue application hole. When the sliding block moves away from the glue application hole, it causes the two sets of connecting crossbars to move away from each other.

[0021] By adopting the above technical solution, the moving support pushes the sliding block to compress the second elastic element. The sliding block drives the two sets of connecting crossbars to move in opposite directions through the hinged connecting rod, thereby enabling multiple sets of clamping blocks to close synchronously and achieve synchronous clamping and sealing of multiple conduit bodies. When the support moves back, the second elastic element pushes the sliding block to reset and releases the clamping and sealing of multiple sets of clamping blocks on the conduit body, achieving high consistency of multi-station synchronous sealing action, compact and reliable structure, suitable for automated production lines, and improving overall sealing efficiency and equipment stability.

[0022] Furthermore, a bushing is rotatably disposed within the sliding groove, and the sliding rod is sealed and slidably disposed within the bushing. The first elastic element is disposed between the bottom of the bushing and the end of the sliding rod and is used to push the sliding rod to slide away from the bushing.

[0023] By adopting the above technical solution, the sliding rod slides in a sealed manner within the bushing and can rotate with the adhesive application shaft. The first elastic element is set at the bottom of the bushing to provide pre-tightening force so that the sealing head is normally closed. At the same time, when the clamping block clamps the sealing head, it prevents the sliding rod from rotating, thus ensuring the sealing between the bushing and the sliding rod.

[0024] Furthermore, the sealing head includes:

[0025] A clamping plate is mounted on a sliding rod, and the end face of the catheter body is pressed against the end face of the clamping plate. The axis of the clamping plate coincides with the axis of the glue-applying seat, and its diameter is smaller than the inner diameter of the glue-applying seat.

[0026] A limiting plate is connected to the end of the abutment plate away from the sliding rod by a fixing rod, and the limiting plate is slidably disposed inside the catheter body;

[0027] A telescopic airbag is fixedly installed between the limiting plate and the pressing plate. A sealed air cavity is formed between the bushing and the end face of the sliding rod. The telescopic airbag is connected to the inside of the sealed air cavity through an air passage. When the sliding rod slides closer to the bottom of the bushing, the gas in the sealed airbag is discharged into the telescopic airbag, causing the telescopic airbag to expand and press against the inner wall of the conduit body.

[0028] By adopting the above technical solution, the catheter body is inserted and pressed against the end face of the pressing plate. The limiting plate restricts the extension and retraction direction of the telescopic airbag, pushes the sliding rod to retract and compress the gas in the sealing air chamber, so that the compressed gas enters the telescopic airbag through the air passage and expands to fit tightly against the inner wall of the catheter to achieve an internal seal. This forms a double seal inside and outside, which greatly reduces the probability of adhesive seeping into the inside of the catheter and improves the product qualification rate.

[0029] Furthermore, the limiting disc is provided with a tapered guide on the side near the catheter body, the sidewall of the limiting disc has a wavy structure, and a dispersion chamber communicating with the inside of the airway is opened inside the fixing rod. The dispersion chamber disperses the gas discharged from the airway into the side of the telescopic airbag near the fixing rod. A pressure relief pipe is provided in the airway. The pressure relief pipe is used to discharge the gas between the telescopic airbag and the pressing disc into the end of the limiting disc away from the pressing disc.

[0030] By adopting the above technical solution, the limiting plate is provided with a conical guide to facilitate the insertion of the catheter body. The gas discharged from the airway is evenly distributed into the telescopic airbag through the dispersion chamber, so that the telescopic airbag expands evenly. At the same time, the corrugated sidewall of the limiting plate and the pressure relief pipe discharge excess gas from both ends of the telescopic airbag, avoiding excessive air pressure during the expansion of the telescopic airbag, which may cause the catheter body to fall out. Ultimately, the sealing stability and guiding performance are improved to prevent gas accumulation and sealing failure.

[0031] Furthermore, a clearance groove is provided on one side of the bottom of the support base to avoid the adhesive application area of ​​the conduit body. The bottom of the clearance groove is inclined, and an outlet tube is provided at the lowest point of the bottom of the clearance groove for exporting and storing the adhesive dripping from the clearance groove.

[0032] By adopting the above technical solution, the inclined setting of the clearance groove guides the dripping adhesive to the outlet pipe for collection and storage, ultimately reducing adhesive waste and equipment pollution, keeping the working environment clean, and facilitating adhesive recycling.

[0033] Furthermore, the clamping block is detachably provided with an elastic sealing layer on the side near the catheter body, and the elastic sealing layer is made of silicone or fluororubber.

[0034] By adopting the above technical solution, the inner side of the clamping block is provided with a detachable elastic sealing layer made of silicone or fluororubber to provide a soft and chemically resistant sealing contact, thereby enhancing the sealing adaptability, avoiding damage to the conduit surface, and facilitating maintenance and replacement.

[0035] Furthermore, a scraping groove is provided on the side wall of the sliding groove, and a scraper for scraping the side wall of the sliding rod is slidably arranged in the scraping groove. The end of the scraper near the pressing plate is rotatably connected to the sliding rod through a rotating ring. When the sliding rod slides, it drives the scraper to slide in the scraping groove. When the glue-applying shaft rotates, it drives the scraper to rotate and scrapes the outside of the sliding rod.

[0036] By adopting the above technical solution, the sliding rod moves and drives the scraper to slide in the scraping groove. When the sliding rod brings the scraper out, the scraper rotates with the glue-applying shaft to scrape off the glue on the surface of the sliding rod, preventing the glue from solidifying on the sliding rod and affecting the sealing and movement accuracy.

[0037] Furthermore, the scraper groove is offset from the axis of the adhesive application shaft, and the offset angle is smaller the closer it is to the clamping plate. The scraper is made of a deformable material, and the scraper is in tight fit with the outer surface of the sliding rod on the side near the rotating ring.

[0038] By adopting the above technical solution, the scraper groove is offset, and the scraper is made of deformable material and deflects and sticks to the rod surface when the sliding rod extends, so as to ensure that the scraper always scrapes material effectively, and at the same time, the rotation between the liner and the glue-applying shaft is not affected when the scraper is not extended.

[0039] Furthermore, the sliding rod is provided with an anti-stick coating to reduce adhesive adhesion, and the bushing is provided with a scraper ring for scraping off the adhesive on the surface of the sliding rod.

[0040] By adopting the above technical solution, an anti-stick coating is provided on the surface of the sliding rod to reduce the probability of adhesive adhering to the surface of the sliding rod. At the same time, a scraping ring is provided at the bushing opening to further scrape off the residual adhesive when the sliding rod moves back into the bushing, thereby significantly reducing the probability of adhesive adhering to the sliding rod.

[0041] In summary, this application includes at least one of the following beneficial technical effects:

[0042] 1. The initial sealing of the adhesive application hole is achieved by the sliding sealing head abutting against it. When the catheter is inserted, the sealing head is pushed to slide and triggers the expansion of the telescopic airbag to seal the inner wall of the catheter body. The position of the sealing head in the adhesive application hole where the catheter is not inserted remains unchanged. At the same time, the displacement of the support seat drives the clamping block to close through the drive assembly, clamping and sealing the outer wall of the catheter body or the side wall of the sealing head. This achieves automatic leakage prevention when the catheter body is not inserted, double sealing inside and outside after insertion, and release of clamping block before the catheter body when withdrawing. This achieves the technical effect of automatic leakage prevention when the catheter is not inserted and no damage to the adhesive layer when withdrawing, improving the adhesive application quality and production efficiency.

[0043] 2. When the sliding rod is inside the bushing, the scraper is also retracted into the scraping groove, thus not affecting the normal application of adhesive to the guide tube body. When the sliding rod slides out of the bushing and seals the adhesive application hole through the sealing head, the scraper slides out with the sliding rod and deflects at a certain angle to press against the outer wall of the sliding rod. This allows the scraper to scrape the adhesive from the sliding rod as the adhesive application shaft rotates, ultimately reducing the probability of the adhesive solidifying due to prolonged residence on the sliding rod. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of an auxiliary device for applying adhesive to a medical catheter, according to Embodiment 1 of this application;

[0045] Figure 2 This is a top view of Embodiment 1 of this application;

[0046] Figure 3 yes Figure 2 A cross-sectional schematic diagram of AA in the middle;

[0047] Figure 4 yes Figure 3 An enlarged schematic diagram of section B, showing the telescopic airbag in an inflated state;

[0048] Figure 5 yes Figure 2 A cross-sectional view of CC.

[0049] Figure 6 yes Figure 5 Enlarged schematic diagram of section D in the middle;

[0050] Figure 7 This is a structural schematic diagram of the sealing mechanism of Embodiment 1 of this application, wherein the side wall of the fixing sleeve is viewed in section;

[0051] Figure 8 yes Figure 7 Enlarged schematic diagram of section E in the middle;

[0052] Figure 9 This is a structural schematic diagram of the sliding rod and scraper positions in Embodiment 2 of this application, wherein the sliding rod is in the extended state;

[0053] Figure 10 yes Figure 9 Enlarged schematic diagram of section F in the middle.

[0054] Reference numerals: 1. Synchronous transmission mechanism; 11. Cylinder; 2. Synchronous glue application mechanism; 21. Glue box; 22. Glue application seat; 23. Glue application shaft; 24. Glue application hole; 25. Sliding groove; 26. Bushing; 261. Sealing air chamber; 27. Sliding rod; 271. Air passage; 28. First elastic element; 3. Sealing head; 31. Pressing plate; 32. Limiting plate; 33. Telescopic airbag; 34. Fixing rod; 341. Dispersion chamber; 35. Pressure relief pipe; 4. Sealing mechanism; 41. Fixing sleeve; 42. Support seat; 421. Alternating groove; 422. Outlet pipe; 43. Clamping block; 5. Drive assembly; 51. Sliding block; 52. Connecting crossbar; 53. Connecting rod; 54. Second elastic element; 6. Scraper groove; 61. Scraper; 62. Rotating ring; 7. Conduit body. Detailed Implementation

[0055] The following is in conjunction with the appendix Figures 1-10This application will be described in further detail.

[0056] This application discloses an auxiliary device for applying adhesive to medical catheters.

[0057] Example 1

[0058] Reference Figure 1 , Figure 2 and Figure 3 An auxiliary device for applying adhesive to medical catheters includes a synchronous transmission mechanism 1 and a synchronous adhesive application mechanism 2. The synchronous adhesive application mechanism 2 includes an adhesive container 21, multiple adhesive application seats 22, and an adhesive application shaft 23. The front end face of the adhesive application seat 22 is provided with an adhesive application hole 24. A sliding groove 25 is provided in the adhesive application shaft 23. A sliding rod 27 is slidably arranged in the sliding groove 25 along the axial direction of the adhesive application shaft 23. The sliding rod 27 can rotate relative to the sliding groove 25. A sealing head 3 for sealing the adhesive application hole 24 is provided at the front end of the sliding rod 27. A first elastic element 28 is provided in the sliding groove 25. The first elastic element 28 is used to provide a pre-tightening force for the sealing head 3 to tend to seal the adhesive application hole 24. After the catheter body 7 is inserted into the adhesive application hole 24, it presses against the sealing head 3 and pushes the sealing head 3 to slide towards the bottom of the sliding groove 25. A sealing mechanism 4 is provided on the adhesive container 21 for sealing the gap between the catheter body 7 and the adhesive application hole 24.

[0059] Reference Figure 3 and Figure 4 The synchronous glue application mechanism 2 includes a glue container 21, multiple glue application seats 22, and a glue application shaft 23. Each glue application seat 22 has a glue application hole 24 on its front end face. A sliding groove 25 is formed inside the glue application shaft 23, and a sliding rod 27 is slidably disposed within the sliding groove 25 along the axis of the glue application shaft 23. The sliding rod 27 is rotatable relative to the sliding groove 25. A sealing head 3 is provided at the front end of the sliding rod 27 for sealing the glue application hole 24. A first elastic element 28 is provided within the sliding groove 25, providing a pre-tightening force that causes the sealing head 3 to tend towards sealing the glue application hole 24. When the guide tube body 7 is inserted into the glue application hole 24, its end abuts against the sealing head 3 and pushes the sealing head 3 towards the bottom of the sliding groove 25.

[0060] Reference Figure 4 A bushing 26 is rotatably disposed within the sliding groove 25, and a sliding rod 27 is sealingly slidably disposed inside the bushing 26. When the adhesive application shaft 23 rotates, the bushing 26 can rotate relative to the adhesive application shaft 23. At the same time, because the conduit body 7 presses against the sealing head 3, it further prevents the bushing 26 from rotating with the adhesive application shaft 23. A first elastic element 28 is disposed between the bottom of the bushing 26 and the end of the sliding rod 27, and is used to push the sliding rod 27 to slide away from the bushing 26.

[0061] Reference Figure 5 and Figure 6The sealing head 3 includes a clamping plate 31, a limiting plate 32, and a telescopic airbag 33. The clamping plate 31 is fixedly installed on the end of the sliding rod 27, and the end face of the catheter body 7 is pressed against the end face of the clamping plate 31. The axis of the clamping plate 31 coincides with the axis of the adhesive base 22, and its diameter is smaller than the inner diameter of the adhesive base 22. The optimal diameter of the clamping plate 31 is equal to the outer diameter of the catheter body 7. The limiting plate 32 is connected to the end of the clamping plate 31 away from the sliding rod 27 by a fixing rod 34, and the limiting plate 32 is slidably disposed inside the catheter body 7.

[0062] Reference Figure 4 and Figure 6 The telescopic airbag 33 is fixedly installed between the limiting plate 32 and the clamping plate 31; a sealed air cavity 261 is formed between the bushing 26 and the end face of the sliding rod 27, and the interior of the telescopic airbag 33 is connected to the interior of the sealed air cavity 261 through the air passage 271. Specifically, when the guide tube body 7 is inserted, the limiting plate 32 guides the guide tube body 7, ultimately causing the guide tube body 7 to press against the end face of the clamping plate 31. As the guide tube body 7 continues to slide inward, it further pushes the sliding rod 27 to slide closer to the bottom of the bushing 26. During its sliding process, the gas in the sealed air cavity 261 is discharged into the telescopic airbag 33 through the air passage 271, causing the telescopic airbag 33 to expand and press against the inner wall of the guide tube body 7, thereby sealing the inner wall of the guide tube body 7 and further reducing the probability of the adhesive penetrating into the interior of the guide tube body 7 during the spraying process.

[0063] Reference Figure 6 A tapered guide portion is provided on the side of the limiting disc 32 near the catheter body 7 to guide the catheter body 7. Simultaneously, the sidewall of the limiting disc 32 has a wavy structure, allowing gas in the gap between the telescopic airbag 33 and the limiting disc 32 to enter the catheter body 7 and escape through the wavy structure when the telescopic airbag 33 inflates. A dispersion chamber 341, communicating with the air passage 271, is provided inside the fixing rod 34. The dispersion chamber 341 disperses the gas discharged from the air passage 271 to the side of the telescopic airbag 33 near the fixing rod 34. A pressure relief pipe 35 is provided inside the air passage 271 to discharge the gas between the telescopic airbag 33 and the clamping disc 31 into the end of the limiting disc 32 away from the clamping disc 31, thereby reducing the probability that the catheter body 7 will detach from the clamping disc 31 under air pressure when the telescopic airbag 33 inflates.

[0064] Reference Figure 4 The sliding rod 27 is provided with an anti-stick coating to reduce the probability of adhesive adhering to the sliding rod 27. The bushing 26 is provided with a scraper ring for scraping off the adhesive on the surface of the sliding rod 27. The scraper ring is used to scrape the adhesive off the surface of the sliding rod 27 when it slides back into the bushing 26.

[0065] Reference Figure 1 and Figure 7The sealing mechanism 4 includes a fixed sleeve 41, a support base 42, clamping blocks 43, and a drive assembly 5. The fixed sleeve 41 is located on the side of the adhesive container 21 near the adhesive application hole 24. The support base 42 is slidably disposed inside the fixed sleeve 41 to support the non-adhesive-coated area at the bottom of the catheter body 7. Two sets of clamping blocks 43 are slidably disposed on a section of the fixed sleeve 41 near the adhesive application hole 24 in a direction that moves closer or further apart from each other. When the two sets of clamping blocks 43 move closer together, they clamp and seal the catheter body 7. To improve the clamping effect of the clamping blocks 43 on the catheter body 7, an elastic sealing layer is detachably installed on the side of the clamping blocks 43 near the catheter body 7. The elastic sealing layer is made of silicone or fluororubber. The drive assembly 5 is disposed on the fixed sleeve 41. When the support base 42 slides, the drive assembly 5 controls the sliding of the clamping blocks 43.

[0066] Reference Figure 7 and Figure 8 The drive assembly 5 includes a sliding block 51, a connecting crossbar 52, a connecting rod 53, and a second elastic element 54. A support frame for supporting multiple sets of catheter bodies 7 is spaced apart on the support base 42. The sliding block 51 is slidably disposed within the fixed sleeve 41 along the sliding direction of the support base 42. Two sets of connecting crossbars 52 are provided, sliding vertically towards or away from each other on the fixed sleeve 41. Multiple sets of clamping blocks 43 are spaced apart on the side of the connecting crossbars 52 that are close to each other. The clamping blocks 43 on the two sets of connecting crossbars 52 are symmetrically arranged. When the two sets of connecting crossbars 52 approach each other, they simultaneously drive the multiple sets of clamping blocks 43 to approach each other and clamp the outer wall of the catheter body 7 or the sealing head 3. Clamping and sealing; two sets of connecting rods 53 are provided, and both sets of connecting rods 53 are hinged to the sliding block 51. The other ends of the two sets of connecting rods 53 are respectively hinged to the two sets of connecting crossbars 52. When the sliding block 51 slides, it drives the two sets of connecting crossbars 52 to move closer or further away from each other; the second elastic element 54 is provided in the fixed sleeve 41. The second elastic element 54 is used to provide a pre-tightening force for the sliding block 51 to move away from the glue hole 24. When the sliding block 51 moves away from the glue hole 24, it drives the two sets of connecting crossbars 52 to move away from each other, and finally drives the multiple sets of clamping blocks 43 to move away from each other; the function of this embodiment is that two sets of sliding blocks 51 are symmetrically arranged on both sides to drive the two ends of the same connecting crossbar 52 simultaneously.

[0067] Reference Figure 7 and Figure 8Specifically, during installation, the catheter body 7 is placed on the support base 42 and clamped and fixed by an external clamping mechanism. Then, the cylinder 11 is activated, which drives the glue application mechanism to slide, thereby causing the glue box 21 to slide closer to the catheter body 7. This allows the support base 42 to slide within the fixing sleeve 41. When the support base 42 approaches the glue box 21, it pushes the sliding block 51 to slide relative to the fixing sleeve 41, thereby compressing the second elastic element 54. The sliding block 51 drives the two sets of connecting crossbars 52 to move closer to each other through the connecting rod 53. Finally, the elastic sealing layer on the multiple sets of clamping blocks 43 on the connecting crossbars 52 presses against the side wall of the catheter body 7 or the sealing head 3, thereby sealing the gap between the catheter body 7 and the glue application hole 24. After the adhesive is applied to the catheter body 7, the cylinder 11 drives the adhesive application mechanism to move back, causing the fixing sleeve 41 to slide relative to the support base 42. The second elastic element 54 pushes the sliding block 51 to reset. The sliding block 51 drives the two sets of connecting beams to move away from each other through the connecting rod 53. The two sets of connecting beams simultaneously drive multiple sets of clamping blocks 43 to slide away from the axis of the catheter body 7, thereby releasing the sealing lock on the catheter body 7, so that the adhesive application hole 24 will not scrape off the adhesive layer on its surface when the catheter body 7 is withdrawn. In this embodiment, the support base 42 remains in the same position relative to the connecting main board. It slides within the fixing sleeve 41 by sliding the fixing sleeve 41.

[0068] Reference Figure 3 A clearance groove 421 is provided on one side of the bottom of the support base 42 to avoid the glue application area of ​​the guide tube body 7. The bottom of the clearance groove 421 is inclined, specifically, the side near the glue application hole 24 is lower and the middle position of the clearance groove 421 is lower, so that the glue in the clearance groove 421 is concentrated in one place. A discharge pipe 422 is provided at the lowest point of the clearance groove 421 to discharge and store the glue dripping in the clearance groove 421. The concentrated glue is discharged and stored in time through the discharge pipe 422, reducing pollution and avoiding waste.

[0069] Reference Figure 3 and Figure 4The guide tube body 7 is placed at the glue application hole 24. When the cylinder 11 is not activated, the first elastic element 28 pushes the sliding rod 27 to slide away from the bushing 26. When the cylinder 11 is activated, the guide tube body 7 is pressed against the pressing plate 31 by the guide of the limiting plate 32. As the sliding rod 27 slides into the bushing 26, the gas in its sealing air chamber 261 enters the telescopic airbag 33 through the air passage 271, ultimately causing the telescopic airbag 33 to press against the inner wall of the guide tube body 7 to form a seal. When the telescopic airbag 33 inflates, the gas between the telescopic airbag 33 and the clamping plate 31 is discharged into one end of the limiting plate 32 through the pressure relief pipe 35, and finally pushes the sliding rod 27 into the bushing 26. At the same time, the telescopic airbag 33 and the clamping plate 31 jointly seal the inside of the conduit body 7, reducing the probability of adhesive entering the inside of the conduit body 7 during adhesive application. After the sliding rod 27 slides into the bushing 26, the two sets of clamping blocks seal the gap between the conduit body 7 and the adhesive application hole 24.

[0070] Reference Figure 5 and Figure 6 When the cylinder 11 is not activated, the first elastic element 28 pushes the sliding rod 27 to slide away from the bushing 26. When the cylinder 11 is activated, since there is no push from the guide body 7, the sliding rod 27 remains in the same position relative to the bushing 26. After the support 42 slides to the designated position of the fixed sleeve 41, the two sets of abutting blocks seal the gap between the side wall of the abutting plate 31 and the glue application hole 24.

[0071] The working principle of Embodiment 1 of this application is as follows:

[0072] The initial sealing of the adhesive hole 24 is achieved by the sliding sealing head 3 abutting against the adhesive hole 24. When the catheter is inserted, the sealing head 3 is pushed to slide and triggers the expansion of the telescopic airbag 33 to seal the inner wall of the catheter body 7. The position of the sealing head 3 in the adhesive hole 24 where the catheter is not inserted remains unchanged. At the same time, the displacement of the support base 42 drives the clamping block 43 to close through the drive assembly 5 to clamp and seal the outer wall of the catheter body 7 or the side wall of the sealing head 3. This achieves automatic leakage prevention when the catheter body 7 is not inserted, double sealing inside and outside after insertion, and release of clamping block 43 before the catheter body 7 when withdrawing. This achieves the technical effect of automatic leakage prevention when the catheter is not inserted and no damage to the adhesive layer when withdrawing, improving the adhesive quality and production efficiency.

[0073] Example 2

[0074] Reference Figure 9 and Figure 10The difference between this embodiment and Embodiment 1 is that a scraping groove 6 is formed on the side wall of the sliding groove 25, and a scraper 61 is slidably arranged in the scraping groove 6 for scraping the side wall of the sliding rod 27; the end of the scraper 61 near the pressing plate 31 is rotatably connected to the sliding rod 27 through a rotating ring 62. When the sliding rod 27 slides, it drives the scraper 61 to slide in the scraping groove 6. When the glue-applying shaft 23 rotates, it drives the scraper 61 to rotate and scrape the outside of the sliding rod 27.

[0075] Reference Figure 9 and Figure 10 The scraper groove 6 is offset from the axis of the coating shaft 23, and the offset angle is smaller the closer it is to the clamping plate 31; the scraper 61 is made of deformable material, and the scraper 61 is provided with a coating to reduce the probability of adhesive adhesion. At the same time, the scraper 61 can quickly throw off the adhesive on it when it rotates with the coating shaft 23; the side of the scraper 61 near the rotating ring 62 is in tight fit with the outer surface of the sliding rod 27.

[0076] Reference Figure 9 and Figure 10 During the adhesive application process, for the adhesive application hole 24 that is not inserted into the conduit body 7, the adhesive application hole 24 is sealed by the sealing head 3, and at the same time, the clamping block 43 clamps and seals the sealing head 3, further reducing the probability of the sealing head 3 rotating; at the same time, the scraper 61 slides out of the scraping groove 6 with the sliding rod 27, and under the guidance of the rotating ring 62 and the scraping groove 6, the scraper 61 deflects at a certain angle and presses against the outer wall of the sliding rod 27. Part of the scraper 61 is always located in the scraping groove 6. When the adhesive application shaft 23 rotates, it drives the scraper 61 to rotate on the sliding rod 27, thereby scraping off the adhesive on the outer wall of the sliding rod 27 in time, reducing the probability of adhesive adhering to the sliding rod 27.

[0077] The working principle of Embodiment 2 of this application is as follows:

[0078] When the sliding rod 27 is inside the bushing 26, the scraper 61 is also retracted into the scraping groove 6, thus not affecting the normal application of adhesive to the guide tube body 7. When the sliding rod 27 slides out of the bushing 26 and seals the adhesive application hole 24 through the sealing head 3, the scraper 61 slides out with the sliding rod 27 and deflects at a certain angle to press against the outer wall of the sliding rod 27. This causes the scraper 61 to scrape the sliding rod 27 that has slid out of the bushing 26 when the adhesive application shaft 23 rotates, ultimately reducing the probability that the adhesive will solidify due to long-term residence on the sliding rod 27.

[0079] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary device for applying adhesive to medical catheters, comprising a synchronous transmission mechanism (1) and a synchronous adhesive application mechanism (2), wherein the synchronous adhesive application mechanism (2) comprises an adhesive container (21), a plurality of adhesive application seats (22) and an adhesive application shaft (23), wherein the front end face of the adhesive application seat (22) is provided with an adhesive application hole (24), characterized in that: The adhesive application shaft (23) is provided with a sliding groove (25). A sliding rod (27) is slidably arranged in the sliding groove (25) along the axis of the adhesive application shaft (23). The sliding rod (27) can rotate relative to the sliding groove (25). A sealing head (3) for sealing the adhesive application hole (24) is provided at the front end of the sliding rod (27). A first elastic element (28) is provided in the sliding groove (25). The first elastic element (28) is used to provide a pre-tightening force for the sealing head (3) to tend to seal the adhesive application hole (24). After the conduit body (7) is inserted into the adhesive application hole (24), it abuts against the sealing head (3) and pushes the sealing head (3) to slide towards the bottom of the sliding groove (25). A sealing mechanism (4) for sealing the gap between the conduit body (7) and the adhesive application hole (24) is provided on the adhesive box (21). The sealing mechanism (4) includes: A fixing sleeve (41) is provided on the side of the adhesive box (21) near the adhesive application hole (24); Support base (42), which is slidably disposed in the fixed sleeve (41) and used to support the non-glued area at the bottom of the catheter body (7); Clamping blocks (43), two sets of clamping blocks (43) are slidably disposed on a section of the fixed sleeve (41) near the glue hole (24) in a direction of mutual approach or distance. When the two sets of clamping blocks (43) approach each other, they clamp and seal the catheter body (7). The drive assembly (5) is mounted on the fixed sleeve (41). When the support base (42) slides, the clamping block (43) is controlled to slide by the drive assembly (5).

2. The auxiliary device for applying adhesive to medical catheters according to claim 1, characterized in that: The drive assembly (5) is used to simultaneously drive multiple sets of clamping blocks (43) to slide, and the drive assembly (5) includes: A sliding block (51) is slidably disposed in a fixed sleeve (41) along the sliding direction of the support base (42); Connecting crossbars (52) are provided in two sets and are slidably disposed in the fixing sleeve (41) along the direction of mutual approach or mutual distance. Multiple sets of symmetrically arranged clamping blocks (43) are provided on opposite sides of the two sets of connecting crossbars (52). The connecting rods (53) are hinged to the sliding block (51), and the other ends of the two sets of connecting rods (53) are respectively hinged to the two sets of connecting crossbars (52). When the sliding block (51) slides, the two sets of connecting crossbars (52) are driven to move closer or further away from each other through the two sets of connecting rods (53). The second elastic element (54) is disposed in the fixed sleeve (41) and provides a preload force for the sliding block (51) to move away from the glue application hole (24). When the sliding block (51) moves away from the glue application hole (24), it causes the two sets of connecting crossbars (52) to move away from each other.

3. The auxiliary device for applying adhesive to medical catheters according to claim 1, characterized in that: A bushing (26) is rotatably disposed inside the sliding groove (25), and the sliding rod (27) is sealed and slidably disposed inside the bushing (26). The first elastic element (28) is disposed between the bottom of the bushing (26) and the end of the sliding rod (27) and is used to push the sliding rod (27) to slide away from the bushing (26).

4. The auxiliary device for applying adhesive to medical catheters according to claim 3, characterized in that: The sealing head (3) includes: A clamping plate (31) is mounted on a sliding rod (27). The end face of the catheter body (7) is pressed against the end face of the clamping plate (31). The axis of the clamping plate (31) coincides with the axis of the glue-applying seat (22) and its diameter is smaller than the inner diameter of the glue-applying seat (22). The limiting plate (32) is connected to the end of the abutment plate (31) away from the sliding rod (27) by a fixing rod (34), and the limiting plate (32) is slidably disposed inside the catheter body (7); The telescopic airbag (33) is fixedly installed between the limiting plate (32) and the pressing plate (31). A sealed air chamber (261) is formed between the bushing (26) and the end face of the sliding rod (27). The telescopic airbag (33) is connected to the inside of the sealed air chamber (261) through the air passage (271). When the sliding rod (27) slides closer to the bottom of the bushing (26), the gas in the sealed airbag is discharged into the telescopic airbag (33) and the telescopic airbag (33) expands and presses against the inner wall of the catheter body (7).

5. An auxiliary device for applying adhesive to medical catheters according to claim 4, characterized in that: The limiting plate (32) is provided with a tapered guide on the side near the catheter body (7). The side wall of the limiting plate (32) has a wave-shaped structure. The fixed rod (34) has a dispersion chamber (341) inside that communicates with the inside of the airway (271). The dispersion chamber (341) disperses the gas discharged from the airway (271) to the side of the telescopic airbag (33) near the fixed rod (34). The airway (271) is provided with a pressure relief pipe (35). The pressure relief pipe (35) is used to discharge the gas between the telescopic airbag (33) and the pressing plate (31) into the end of the limiting plate (32) away from the pressing plate (31).

6. An auxiliary device for applying adhesive to medical catheters according to claim 2, characterized in that: The support base (42) has a relief groove (421) on one side of the bottom to avoid the glue application area of ​​the conduit body (7). The bottom of the relief groove (421) is inclined, and the lowest point of the bottom of the relief groove (421) is provided with a discharge tube (422) for exporting and storing the glue dripping in the relief groove (421).

7. An auxiliary device for applying adhesive to medical catheters according to claim 2, characterized in that: The clamping block (43) is detachably provided with an elastic sealing layer on the side near the catheter body (7), and the elastic sealing layer is made of silicone or fluororubber.

8. An auxiliary device for applying adhesive to medical catheters according to claim 3, characterized in that: A scraping groove (6) is provided on the side wall of the sliding groove (25). A scraper (61) for scraping the side wall of the sliding rod (27) is slidably arranged in the scraping groove (6). The end of the scraper (61) near the pressing plate (31) is rotatably connected to the sliding rod (27) through a rotating ring (62). When the sliding rod (27) slides, it drives the scraper (61) to slide in the scraping groove (6). When the glue-applying shaft (23) rotates, it drives the scraper (61) to rotate and scrape the outside of the sliding rod (27).

9. An auxiliary device for applying adhesive to medical catheters according to claim 8, characterized in that: The scraper groove (6) is offset from the axis of the glue-applying shaft (23), and the offset angle is smaller the closer it is to the abutting plate (31). The scraper (61) is made of deformable material, and the scraper (61) is in tight fit with the outer surface of the sliding rod (27) on the side near the rotating ring (62).

10. An auxiliary device for applying adhesive to medical catheters according to claim 3, characterized in that: The sliding rod (27) is provided with an anti-stick coating to reduce adhesive adhesion, and the bushing (26) is provided with a scraper ring for scraping off the adhesive on the surface of the sliding rod (27).

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