Anus medicine applying and applying device suitable for local treatment of ulcerative colitis

Abstract

The invention discloses an anus medicine applying and applying device suitable for local treatment of ulcerative colitis, relates to the field of medical instruments, and solves the problem that an existing anus medicine applying device is difficult to operate. The anus medicine applying and applying device comprises a device shell and an injection tube installed at the end of the device shell, and a holding cylinder is arranged on the outer side of the device shell; a rubber piston is mounted on the inner side of the device shell in a sliding manner; the dosing mechanism is used for improving the medicine applying convenience of the injection tube, and the dosing mechanism is installed between the device shell and the holding cylinder; through the administration mechanism, a pushing rubber piston can be pushed to be arranged on the outer side of the device shell, so that an L-shaped structure is formed between the device shell and the holding cylinder, a patient can conveniently insert an injector into the anus with a single hand, the device is convenient for patients with more body types to use, the problem that a traditional medicine applying device is difficult to operate is solved, the pain of the patient in medicine applying is relieved, and the patient experience is improved. Therefore, the convenience of applying medicine to the anus is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an anal drug application device suitable for local treatment of ulcerative colitis. Background Technique

[0002] Ulcerative colitis is a chronic non-specific inflammatory bowel disease that mainly affects the colon and rectum. It is characterized by continuous and diffuse inflammatory changes in the colorectal mucosa, usually starting from the rectum and possibly gradually spreading to other parts of the colon. Symptoms include abdominal pain, diarrhea, mucus, bloody stools, tenesmus, or varying degrees of systemic symptoms.

[0003] In the treatment of ulcerative colitis (rectal type), mesalazine suppositories are the first-line drug choice. However, many patients have poor efficacy, and there are problems such as inability to retain for a long time and incomplete exertion of drug efficacy, and the size of the suppository does not match the size of the patient's anus. Individual patients also experience relaxation of the anal sphincter due to long-term use of suppositories, which limits the efficacy and use of suppositories. Mesalazine enema is also an option, but the operation is relatively complex, and many patients also have problems with inability to retain for a long time. Therefore, it is necessary to search for and develop new drug administration methods and routes. Using a syringe as a drug carrier device and performing anal drug application becomes a candidate. The patient needs to squat down and open the legs, insert the end of the syringe into the anus, and push the piston to make the ointment or gel in the syringe enter the patient's anal area from the end of the syringe. However, after the syringe is filled with ointment or gel, the piston rod will extend outside the syringe, making the overall length of the syringe and the piston rod longer. If the patient is overweight, it is difficult to hold the syringe with one hand and push the piston with the other hand, and the difficulty of drug application is relatively high. Therefore, the present invention has made innovations and improvements in response to the above problems, aiming to improve the convenience and treatment effect of anal drug application. Summary of the Invention

[0004] The purpose of the present invention is to provide an anal drug application device suitable for local treatment of ulcerative colitis to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An anal drug application device suitable for local treatment of ulcerative colitis, comprising: a device housing and an injection tube installed at the end of the device housing. A grip cylinder is provided on the outer side of the device housing, and a rubber piston is slidably installed inside the device housing. The inner diameter of the injection tube is the same as the inner diameter of the device housing, and the end of the injection tube away from the device housing is an arc structure;

[0007] It further includes:

[0008] A drug delivery mechanism, which is used to improve the convenience of applying medicine with the syringe tube, and the drug delivery mechanism is installed between the device housing and the grip cylinder;

[0009] A tube loading mechanism, which is used for quickly installing and disassembling the syringe tube, and the tube loading mechanism is installed between the device housing and the syringe tube;

[0010] A smearing mechanism, which is used to evenly apply medicine with the syringe tube, and the smearing mechanism is installed inside the syringe tube.

[0011] Preferably, the drug delivery mechanism includes a mounting box fixedly installed on the outer side of the device housing. A driven rod is rotatably installed inside the mounting box. The grip cylinder is fixedly installed on the outer side of the mounting box. A positioning rod is rotatably installed inside the grip cylinder. A first synchronous belt is rotatably installed between the positioning rod and the driven rod. A U-shaped frame is arranged inside the grip cylinder. One end of the U-shaped frame is installed on the outer side of the first synchronous belt. A pressing rod is fixedly installed on the top of the U-shaped frame. A limiting plate is fixedly installed inside the device housing. A screw rod is rotatably installed between the inner side of the device housing and the limiting plate. One end of the screw rod extends to the outside of the device housing. A second synchronous belt is rotatably installed between the screw rod and the driven rod. The driving wheel on the driven rod is larger than the driving wheel on the screw rod. Two support rods are fixedly installed on the top of the rubber piston and symmetrically slide through the limiting plate. A moving block that cooperates with the screw rod is fixedly installed between the two support rods.

[0012] Preferably, the tube loading mechanism includes an insertion cylinder fixedly installed at one end of the syringe tube close to the device housing. An annular slot for limiting and inserting the insertion cylinder is formed on the outer side of the device housing. A plurality of installation cavities are formed inside the device housing and are distributed in central symmetry. An installation plate is slidably installed inside the installation cavity. A clamping block is fixedly installed on one side of the installation plate close to the insertion cylinder. A clamping hole for limiting and inserting the clamping block is formed on the outer side of the insertion cylinder. A push column is fixedly installed on one side of the installation plate close to the clamping block. A sleeve ring is fixedly installed on the outer side of the push column. A sliding cavity for limiting the sliding of the push column and the sleeve ring is formed on the inner side of the installation cavity of the device housing. A spring is fixedly installed between the outer side of the sleeve ring and the inner side of the sliding cavity. One end of the push column away from the installation plate is in contact with the outer side of the rubber piston. One end of the push column close to the rubber piston has a circular arc structure. The top of the rubber piston has an arc-shaped inclined surface structure. A guide rod that slidably penetrates the installation plate is fixedly installed inside the installation cavity of the device housing.

[0013] Preferably, the smearing mechanism includes a positioning snap ring rotatably installed at one end of the injection tube away from the device housing. A discharging block is fixedly installed on the outer side of the positioning snap ring. The outer side of the discharging block is of an arc-shaped structure. A plurality of discharging holes are arranged on the outer side of the discharging block and are symmetrically distributed about the center. A docking rod is fixedly installed on the inner side of the discharging block. A docking hole for the docking rod to slide through is arranged on the outer side of the rubber piston. A socket is installed at one end of the screw rod close to the limiting plate. One end of the docking rod away from the discharging block is in contact with the outer side of the socket. An inserting block is fixedly installed at one end of the docking rod away from the discharging block. The inserting block is of a prism structure and is inserted into the socket in a limited manner.

[0014] Preferably, a rubber sheath is fixedly installed on the outer side of the holding cylinder, and an anti-slip pressing plate is fixedly installed at one end of the pressing rod away from the U-shaped frame.

[0015] Preferably, a sealing sleeve is slidably installed on the outer side of the injection tube. A positioning rib is fixedly installed on the inner side of the sealing sleeve. An annular clamping groove for the positioning rib to be inserted into in a limited manner is arranged on the outer side of the device housing.

[0016] Preferably, two symmetrically distributed limiting sliding strips are fixedly installed on the outer side of the U-shaped frame. A limiting sliding groove for the limiting sliding strips to slide through in a limited manner is arranged on the inner side of the holding cylinder.

[0017] Preferably, the U-shaped frame is docked with the first synchronous belt through a hinge block, and the inner side of the U-shaped frame is in contact with the outer side of the first synchronous belt.

[0018] Preferably, a protective box is fixedly installed between the outer side of the installation box and the outer side of the device housing. The second synchronous belt is located inside the protective box.

[0019] Preferably, a plurality of symmetrically distributed guiding blocks are fixedly installed on the outer side of the inserting cylinder. A guiding groove for the guiding blocks to be inserted into in a limited manner is arranged in the annular slot of the device housing.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. Through the drug delivery mechanism of the present invention, the thrust for pushing the rubber piston can be set on the outer side of the device housing, so that the device housing and the holding cylinder form an L-shaped structure, which is convenient for the patient to insert the syringe into the wound with one hand, and is convenient for more patients of different body types to use, solves the problem that the traditional drug application device is difficult to operate, reduces the pain of the patient during drug application, and thus improves the convenience of anal drug application.

[0022] 2. Through the tube loading mechanism of the present invention, the ointment can be first injected into the inner side of the syringe tube, and then the insertion cylinder on the syringe tube can be inserted into the annular slot of the device housing. By the movement of the rubber piston, the clamping block can be inserted into the clamping hole of the insertion cylinder to achieve the positioning of the insertion cylinder, thus enabling the rapid installation of the syringe tube, improving the convenience of ointment injection, and achieving the effects of rapid installation and flexible control of the dosage.

[0023] 3. Through the smearing mechanism of the present invention, when the rubber piston pushes the ointment in the syringe tube, it can drive the docking rod to rotate, making the discharging block in a rotating state, which is convenient for the discharging block to discharge the ointment from the discharging hole in a rotating state, so that the ointment can be evenly smeared on the wound of the patient, thus achieving the effect of uniform drug application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a schematic diagram of the structure of the mounting box and the holding cylinder in the present invention;

[0026] Figure 3 is a schematic diagram of the structure of the U-shaped frame and the limiting slide bar in the present invention;

[0027] Figure 4 is Figure 3 an enlarged schematic diagram of area A in

[0028] Figure 5 is a schematic diagram of the structure of the rubber piston and the support rod in the present invention;

[0029] Figure 6 is a schematic diagram of the structure of the push column and the mounting plate in the present invention;

[0030] Figure 7 is a schematic diagram of the structure of the insertion cylinder and the insertion block in the present invention;

[0031] Figure 8 is a schematic diagram of the structure of the docking rod and the discharging block in the present invention.

[0032] In the figure: 1. Device housing; 2. Syringe tube; 3. Holding cylinder; 4. Rubber piston; 5. Mounting box; 6. Driven rod; 7. Positioning rod; 8. First synchronous belt; 9. U-shaped frame; 10. Pressing rod; 11. Limiting plate; 12. Screw; 13. Second synchronous belt; 14. Support rod; 15. Moving block; 16. Insertion cylinder; 17. Mounting plate; 18. Clamping block; 19. Push column; 20. Collar; 21. Spring; 22. Guide rod; 23. Positioning snap ring; 24. Discharging block; 25. Docking rod; 26. Socket; 27. Insertion block; 28. Rubber sheath; 29. Sealing sleeve; 30. Positioning rib; 31. Limiting slide bar; 32. Hinge block; 33. Protection box; 34. Guide block; 35. Anti-slip pressing plate. Detailed implementation mode

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1: Please refer to Figures 1-8 , an anal drug application device suitable for local treatment of ulcerative colitis shown in the figure, including a device housing 1 and an injection tube 2 installed at the end of the device housing 1. A grip cylinder 3 is arranged on the outer side of the device housing 1. The grip cylinder 3 and the device housing 1 are in an L-shaped structure, enabling the patient to hold the grip cylinder 3 and insert the injection tube 2 at the end of the device housing 1 into the anus, improving the convenience of inserting the injection tube 2 and being suitable for patients of more body types. A rubber piston 4 is slidably installed inside the device housing 1. When the rubber piston 4 moves, it can discharge the ointment in the injection tube 2. The inner diameter of the injection tube 2 is the same as that of the device housing 1. The end of the injection tube 2 away from the device housing 1 is in an arc structure, facilitating the insertion of the injection tube 2 into the anus. A sealing sleeve 29 is slidably installed on the outer side of the injection tube 2, providing protection for the injection tube 2 and facilitating storage and sealing. A positioning rib 30 is fixedly installed inside the sealing sleeve 29. An annular card slot for the positioning rib 30 to be limited and inserted is opened on the outer side of the device housing 1. Pulling the sealing sleeve 29 can pull out the positioning rib 30 from the annular card slot on the outer side of the device housing 1, facilitating the quick installation and disassembly of the sealing sleeve 29; further including: a drug delivery mechanism for improving the convenience of applying the drug by the injection tube 2, and the drug delivery mechanism is installed between the device housing 1 and the grip cylinder 3;

[0035] The drug delivery mechanism includes a mounting box 5 fixedly installed on the outer side of the device housing 1. A driven rod 6 is rotatably installed inside the mounting box 5. A grip cylinder 3 is fixedly installed on the outer side of the mounting box 5. A positioning rod 7 is rotatably installed inside the grip cylinder 3. A first synchronous belt 8 is rotatably installed between the positioning rod 7 and the driven rod 6. When the positioning rod 7 rotates, it can drive the driven rod 6 to rotate through the first synchronous belt 8. Inside the grip cylinder 3, there is a U-shaped frame 9. One end of the U-shaped frame 9 is installed on the outer side of the first synchronous belt 8. The U-shaped frame 9 is docked with the first synchronous belt 8 through a hinge block 32. When the U-shaped frame 9 moves, it can push the first synchronous belt 8 to rotate and move through the hinge block 32, so that the first synchronous belt 8 cooperates with the positioning rod 7 to drive the driven rod 6 to rotate. And the inner side of the U-shaped frame 9 is in contact with the outer side of the first synchronous belt 8, so that when the U-shaped frame 9 moves, it can move along the outer side of the first synchronous belt 8 to provide auxiliary positioning for the first synchronous belt 8. On the outer side of the U-shaped frame 9, two symmetrically distributed limit slide bars 31 are fixedly installed. Inside the grip cylinder 3, there are limit chutes for the limit slide bars 31 to slide. When the U-shaped frame 9 moves, it can drive the limit slide bars 31 to move along the limit chutes of the grip cylinder 3 to improve the smoothness of the movement of the U-shaped frame 9. On the top of the U-shaped frame 9, a pressing rod 10 is fixedly installed. The pressing rod 10 slidably extends to the outside of the grip cylinder 3. When a patient presses the pressing rod 10, it can drive the U-shaped frame 9 to move. On the outside of the grip cylinder 3, a rubber sheath 28 is fixedly installed. At the end of the pressing rod 10 away from the U-shaped frame 9, an anti-slip pressing plate 35 is fixedly installed, so that the patient can hold the rubber sheath 28 and press the anti-slip pressing plate 35, then it can push the pressing rod 10 to move downward, improving the convenience of pressing the pressing rod 10. Inside the device housing 1, a limit plate 11 is fixedly installed. Between the inner side of the device housing 1 and the limit plate 11, a screw rod 12 is rotatably installed. One end of the screw rod 12 extends to the outside of the device housing 1. A second synchronous belt 13 is rotatably installed between the screw rod 12 and the driven rod 6. When the driven rod 6 rotates, it can drive the screw rod 12 to rotate synchronously through the second synchronous belt 13. Between the outer side of the mounting box 5 and the outer side of the device housing 1, a protective box 33 is fixedly installed. One end of the driven rod 6 extends to the inside of the protective box 33. The second synchronous belt 13 is located inside the protective box 33 to provide protection for the second synchronous belt 13. The transmission wheel on the driven rod 6 is larger than the transmission wheel on the screw rod 12, so that the rotation speed of the screw rod 12 is greater than the rotation speed of the driven rod 6. On the top of the rubber piston 4, two support rods 14 that symmetrically slide through the limit plate 11 are fixedly installed. Between the two support rods 14, a moving block 15 that cooperates with the screw rod 12 is fixedly installed. When the screw rod 12 rotates, it can drive the rubber piston 4 to move along the inner side of the device housing 1 through the moving block 15 and the support rods 14 to push out the ointment in the injection tube 2.

[0036] Embodiment 2: Please refer to Figures 5-8, this embodiment further elaborates on the first embodiment. The pipe installation mechanism shown in the figure includes an insertion cylinder 16 fixedly installed at one end of the injection pipe 2 close to the device housing 1. An annular slot for the insertion cylinder 16 to be limited and inserted is provided on the outer side of the device housing 1. The insertion cylinder 16 on the injection pipe 2 can be inserted into the annular slot of the device housing 1 to achieve the quick docking of the injection pipe 2. A plurality of mounting cavities symmetrically distributed around the center are provided inside the device housing 1. A mounting plate 17 is slidably installed inside the mounting cavity. A clamping block 18 is fixedly installed on one side of the mounting plate 17 close to the insertion cylinder 16. A clamping hole for the clamping block 18 to be limited and inserted is provided on the outer side of the insertion cylinder 16. When the clamping block 18 is inserted into the clamping hole of the insertion cylinder 16, the insertion cylinder 16 can be fixed in the annular slot of the device housing 1, and thus the injection pipe 2 can be fixed at the end of the device housing 1. A push post 19 is fixedly installed on one side of the mounting plate 17 close to the clamping block 18. A collar 20 is fixedly installed on the outer side of the push post 19. A sliding cavity for the push post 19 and the collar 20 to be limited and slide is provided inside the mounting cavity of the device housing 1. The push post 19 can move the collar 20 along this sliding cavity. A spring 21 is fixedly installed between the outer side of the collar 20 and the inner side of the sliding cavity. When the push post 19 moves, the spring 21 can be stretched through the collar 20, and the resilience of the spring 21 can be utilized to quickly reset the push post 19. One end of the push post 19 away from the mounting plate 17 is in contact with the outer side of the rubber piston 4. When the rubber piston 4 is in contact with one end of the push post 19, the collar 20 can be driven to stretch the spring 21, and when the rubber piston 4 moves away from the push post 19, the resilience of the spring 21 can be utilized to make the push post 19 pull the mounting plate 17 to move. The clamping block 18 on the mounting plate 17 can then be inserted into the clamping hole of the insertion cylinder 16. One end of the push post 19 close to the rubber piston 4 has a circular arc structure, and the top of the rubber piston 4 has an arc-shaped inclined surface structure, which is convenient for the rubber piston 4 to push the push post 19 to move along the sliding cavity of the device housing 1. A guide rod 22 that slidably penetrates the mounting plate 17 is fixedly installed inside the mounting cavity of the device housing 1 to provide guidance for the movement of the mounting plate 17. A plurality of guide blocks 34 symmetrically distributed around the center are fixedly installed on the outer side of the insertion cylinder 16. A guide groove for the guide blocks 34 to be limited and inserted is provided in the annular slot of the device housing 1. When the insertion cylinder 16 is inserted into the annular slot of the device housing 1, the guide blocks 34 on the outer side of the insertion cylinder 16 can be inserted into the guide groove of the annular slot, which is convenient for the clamping hole on the insertion cylinder 16 to be aligned with the clamping block 18.

[0037] Embodiment Three: Please refer to Figures 5-8, this embodiment further illustrates other embodiments. The smearing mechanism in the figure includes a positioning collar 23 rotatably installed at one end of the injection tube 2 away from the device housing 1. A discharging block 24 is fixedly installed on the outer side of the positioning collar 23. When the discharging block 24 rotates, it can drive the positioning collar 23 to rotate along the inner side of the injection tube 2. The outer side of the discharging block 24 is of an arc-shaped structure, which is convenient for the discharging block 24 to abut against the patient's anus, so that the arc surface of the discharging block 24 can open the patient's anus, improving the convenience of inserting the injection tube 2 into the anus. A plurality of discharging holes are arranged on the outer side of the discharging block 24 in a centrally symmetric distribution. When the rubber piston 4 moves, the ointment in the injection tube 2 can be discharged from the discharging holes of the discharging block 24. A docking rod 25 is fixedly installed on the inner side of the discharging block 24. A docking hole for the docking rod 25 to slide through is arranged on the outer side of the rubber piston 4. When the rubber piston 4 moves, it can move along the outer side of the docking rod 25. A socket 26 is installed at one end of the screw rod 12 close to the limiting plate 11. One end of the docking rod 25 away from the discharging block 24 is in contact with the outer side of the socket 26. A plug 27 is fixedly installed at one end of the docking rod 25 away from the discharging block 24. The plug 27 is of a prism structure and is limited and inserted into the inner side of the socket 26. When the screw rod 12 rotates, it can drive the plug 27 to rotate through the socket 26, and the plug 27 drives the docking rod 25 to rotate, thus realizing the rotation of the discharging block 24, so that the ointment can be smeared on the wound of the patient's anus in a rotating state, improving the uniformity of ointment smearing.

[0038] Working principle: First, the patient pulls the sealing sleeve 29, so that the positioning rib 30 on the sealing sleeve 29 is pulled out from the annular slot on the device housing 1, and the sealing sleeve 29 is removed from the injection tube 2. Then, the patient holds the grip cylinder 3 and pulls the pressure rod 10 to move, so that the pressure rod 10 drives the U-shaped frame 9 to move. The U-shaped frame 9 drives the first synchronous belt 8 to rotate and move through the hinge block 32, so that the first synchronous belt 8 cooperates with the positioning rod 7 to drive the driven rod 6 to rotate. The driven rod 6 drives the screw rod 12 to rotate through the second synchronous belt 13. The screw rod 12 drives the two support rods 14 to move along the inner side of the limit plate 11 through the moving block 15, so that the support rods 14 push the rubber piston 4 to move along the inner side of the device housing 1, so that the rubber piston 4 contacts the limit plate 11. The rubber piston 4 pushes the push column 19 to move in the sliding cavity of the device housing 1, so that the push column 19 stretches the spring 21 and drives the mounting plate 17 to move. The mounting plate 17 pulls the clamping block 18 out of the clamping hole of the inserting cylinder 16. At this time, the patient releases the pressure rod 10 and pulls the inserting cylinder 16 on the injection tube 2 out of the annular slot of the device housing 1. Subsequently, the patient injects a fixed amount of ointment into the injection tube 2 to achieve the fixed amount injection of the ointment. Then, the inserting cylinder 16 is inserted into the annular slot of the device housing 1 again, and the guiding block 34 on the inserting cylinder 16 is inserted into the guiding groove of the annular slot, so that the multiple clamping holes on the inserting cylinder 16 are aligned with the multiple clamping blocks 18 one by one. At the same time, the docking rod 25 on the discharging block 24 is close to the socket 26 on the screw rod 12, so that the inserting block 27 on the docking rod 25 is inserted into the inner side of the socket 26. At this time, the patient pushes the pressure rod 10 to move, so that the rubber piston 4 can move away from the push column 19. Using the resilience of the spring 21, the collar 20 pulls the push column 19 back to its original position, and the mounting plate 17 can insert the clamping block 18 into the clamping hole of the inserting cylinder 16 to achieve the quick installation of the injection tube 2. Finally, the patient holds the grip cylinder 3 and inserts the injection tube 2 into the anus, so that the discharging block 24 on the injection tube 2 opens the anus and approaches the wound. At this time, the patient presses the pressure rod 10 again, so that the rubber piston 4 pushes the ointment in the injection tube 2 to be discharged from the discharging hole of the discharging block 24. At the same time, the screw rod 12 drives the inserting block 27 to rotate through the socket 26, so that the inserting block 27 drives the discharging block 24 to rotate through the docking rod 25, and the ointment can be discharged from the discharging hole in a rotating state, so that the ointment can be evenly applied to the wound, thus achieving the effect of uniform medicine application, improving the convenience of medicine application, reducing the pain of the patient during medicine application, and being suitable for patients of more body types to use.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

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

Claims

1. An anal drug application device suitable for local treatment of ulcerative colitis, characterized in that, Comprising: A device housing (1) and an injection tube (2) installed at the end of the device housing (1). A grip cylinder (3) is arranged on the outer side of the device housing (1), and a rubber piston (4) is slidably installed inside the device housing (1); Also comprising: A drug delivery mechanism for improving the convenience of applying medicine to the injection tube (2), and the drug delivery mechanism is installed between the device housing (1) and the grip cylinder (3); A tube loading mechanism for quickly installing and disassembling the injection tube (2), and the tube loading mechanism is installed between the device housing (1) and the injection tube (2); A smearing mechanism for evenly applying medicine to the injection tube (2), and the smearing mechanism is installed inside the injection tube (2).

2. The anal drug application device for local treatment of ulcerative colitis according to claim 1, characterized in that: The drug delivery mechanism includes a mounting box (5) installed on the outer side of the device housing (1). A driven rod (6) is rotatably installed inside the mounting box (5). A positioning rod (7) is rotatably installed inside the grip cylinder (3). A first synchronous belt (8) is rotatably installed between the positioning rod (7) and the driven rod (6). A U-shaped frame (9) is arranged inside the grip cylinder (3). One end of the U-shaped frame (9) is installed on the outer side of the first synchronous belt (8). A pressing rod (10) is fixedly installed at the top of the U-shaped frame (9). A limiting plate (11) is installed inside the device housing (1). A screw rod (12) is rotatably installed between the inner side of the device housing (1) and the limiting plate (11). A second synchronous belt (13) is rotatably installed between the screw rod (12) and the driven rod (6). Two support rods (14) are fixedly installed at the top of the rubber piston (4). A moving block (15) that cooperates with the screw rod (12) is fixedly installed between the two support rods (14).

3. The anal medicine application device for local treatment of ulcerative colitis according to claim 2, characterized in that: The tube loading mechanism includes an insertion cylinder (16) installed at one end of the injection tube (2) close to the device housing (1). An annular slot is formed on the outer side of the device housing (1). A mounting plate (17) is slidably installed inside the device housing (1). A clamping block (18) is fixedly installed on the side of the mounting plate (17) close to the insertion cylinder (16). A clamping hole is formed on the outer side of the insertion cylinder (16). A pushing column (19) is fixedly installed on one side of the mounting plate (17). A collar (20) is installed on the outer side of the pushing column (19). A spring (21) is installed on the outer side of the collar (20). One end of the pushing column (19) is in contact with the outer side of the rubber piston (4).

4. The anal drug application device for local treatment of ulcerative colitis according to claim 3, wherein: The smearing mechanism includes a positioning clamping ring (23) rotatably installed at one end of the injection tube (2). A discharging block (24) is installed on the outer side of the positioning clamping ring (23). The outer side of the discharging block (24) is of an arc-shaped structure. A plurality of discharging holes are formed on the outer side of the discharging block (24). A docking rod (25) is installed inside the discharging block (24). A socket (26) is installed at one end of the screw rod (12). A plug block (27) is fixedly installed at one end of the docking rod (25). The plug block (27) is of a prism structure, and the plug block (27) is limited and inserted inside the socket (26).

5. The anal drug application device for local treatment of ulcerative colitis according to claim 2, characterized in that: A rubber sheath (28) is fixedly installed on the outer side of the grip cylinder (3), and an anti-slip pressing plate (35) is fixedly installed at one end of the pressing rod (10).

6. The anal drug application device for local treatment of ulcerative colitis according to claim 2, characterized in that: A sealing sleeve (29) is slidably installed on the outer side of the injection tube (2), a positioning rib (30) is fixedly installed on the inner side of the sealing sleeve (29), and an annular card slot is formed on the outer side of the device housing (1).

7. An anal drug application device for local treatment of ulcerative colitis according to claim 2, characterized in that: Two limit slide bars (31) are fixedly installed on the outer side of the U-shaped frame (9), and two limit sliding grooves are formed on the inner side of the grip cylinder (3).

8. The anal drug application device for local treatment of ulcerative colitis according to claim 2, characterized in that: The U-shaped frame (9) is docked with the first synchronous belt (8) through a hinge block (32).

9. The anal drug application device for local treatment of ulcerative colitis according to claim 2, wherein: A protective box (33) is installed between the outer side of the installation box (5) and the outer side of the device housing (1), and the second synchronous belt (13) is located inside the protective box (33).

10. The anal drug application device for local treatment of ulcerative colitis according to claim 3, characterized in that: A plurality of guide blocks (34) are fixedly installed on the outer side of the insertion cylinder (16), and guide grooves are formed in the annular slot of the device housing (1).

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