Anal medication applicator suitable for local treatment of ulcerative colitis

Abstract

The present invention discloses an anal medicine application device suitable for local treatment of ulcerative colitis, relates to the field of medical devices, and solves the problem that existing anal medicine application devices are difficult to operate. The device comprises: a device housing and a syringe installed at the end of the device housing, a grip tube is provided on the outer side of the device housing, and a rubber piston is slidably installed on the inner side of the device housing; and further comprises: a drug delivery mechanism for improving the convenience of applying medicine with the syringe, the drug delivery mechanism being installed between the device housing and the grip tube. The present invention can set the thrust of the rubber piston on the outer side of the device housing through the drug delivery mechanism, so that an L-shaped structure is formed between the device housing and the grip tube, which is convenient for the patient to insert the syringe into the anus with one hand, and is convenient for patients of different body types to use, thereby solving the problem that traditional medicine application devices are difficult to operate, reducing the pain of patients in applying medicine, and thus improving the convenience of anal medicine application.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to an anal medicine applicator suitable for local treatment of ulcerative colitis. Background Art

[0002] Ulcerative colitis is a chronic, nonspecific inflammatory bowel disease that primarily affects the colon and rectum. It is characterized by continuous, diffuse inflammatory changes in the colorectal mucosa, which usually begin in the rectum and may gradually spread to other parts of the colon. Symptoms include abdominal pain, diarrhea, mucus, pus, and blood in the stool, tenesmus, or varying degrees of systemic symptoms.

[0003] In the treatment of ulcerative colitis (rectal type), mesalamine suppositories are the first-line drug of choice, but many patients have poor efficacy, and there are problems such as not being able to retain them for a long time and not being able to fully exert their efficacy, and the size of the suppository does not match the size of the patient's anus. Some patients also suffer from relaxation of the anal sphincter due to long-term use of suppositories, which limits the efficacy and use of suppositories; mesalamine enema is also an option, but the operation is relatively complicated, and many patients also have the problem of not being able to retain them for a long time. Therefore, it is necessary to find and develop new methods and routes of medication. Using a syringe as a drug delivery device and applying the drug to the anus has become a candidate. The patient needs to squat and open their legs, insert the end of the syringe into the anus, and push the piston to allow the ointment or gel in the syringe to enter the patient's anus from the end of the syringe. However, after the syringe is loaded with the ointment or gel, the piston rod will extend outside the syringe, making the overall length of the syringe and piston rod longer. If the patient is obese, it is difficult to hold the syringe with one hand and push the piston with the other hand, making it difficult to apply the drug. Therefore, the present invention aims to solve the above problems and make innovations and improvements, aiming to improve the convenience and therapeutic effect of anal medication. Summary of the Invention

[0004] The object of the present invention is to provide an anal medication applicator suitable for local treatment of ulcerative colitis, so as to solve the problems raised in the above-mentioned background technology.

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

[0006] An anal medication applicator suitable for local treatment of ulcerative colitis, comprising: a device housing and an injection tube mounted at an end of the device housing; a grip tube is provided on the outside of the device housing; a rubber piston is slidably mounted on the inside of the device housing; the inner diameter of the injection tube is the same as that of the device housing; and the end of the injection tube away from the device housing is an arc-shaped structure;

[0007] Also includes:

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

[0009] A tube installation mechanism, used for quickly installing and removing the injection tube, the tube installation mechanism being installed between the device housing and the injection tube;

[0010] The smearing mechanism is used to evenly coat the injection tube with medicine, and the smearing mechanism is installed on the inner side of the injection tube.

[0011] Preferably, the dosing mechanism includes a mounting box fixedly mounted on the outside of the device shell, a driven rod rotatably mounted on the inner side of the mounting box, the grip tube fixedly mounted on the outside of the mounting box, a positioning rod rotatably mounted on the inner side of the grip tube, a first synchronous belt rotatably mounted between the positioning rod and the driven rod, a U-shaped frame is provided on the inner side of the grip tube, one end of the U-shaped frame is mounted on the outside of the first synchronous belt, a pressure rod is fixedly mounted on the top of the U-shaped frame, a limiting plate is fixedly mounted on the inner side of the device shell, a screw is rotatably mounted between the inner side of the device shell and the limiting plate, one end of the screw extends to the outside of the device shell, a second synchronous belt is rotatably mounted between the screw and the driven rod, the transmission wheel on the driven rod is larger than the transmission wheel on the screw, and two support rods that slide symmetrically and pass through the limiting plate are fixedly mounted on the top of the rubber piston, and a moving block that cooperates with the screw is fixedly mounted between the two support rods.

[0012] Preferably, the tube loading mechanism includes an insert tube fixedly mounted on the injection tube near one end of the device shell, the outer side of the device shell is provided with an annular slot for limiting the insertion of the insert tube, the interior of the device shell is provided with a plurality of mounting cavities distributed symmetrically with the center, a mounting plate is slidably mounted on the inner side of the mounting cavity, a clamping block is fixedly mounted on the side of the mounting plate close to the insert tube, a clamping hole for limiting the insertion of the clamping block is provided on the outer side of the mounting plate, a push pin is fixedly mounted on the outer side of the push pin with a collar, a sliding cavity is provided on the inner side of the mounting cavity of the device shell for limiting the sliding of the push pin and the collar, a spring is fixedly mounted between the outer side of the collar and the inner side of the sliding cavity, one end of the push pin away from the mounting plate contacts the outer side of the rubber piston, the end of the push pin close to the rubber piston is an arc-shaped structure, the top of the rubber piston is an arc-shaped inclined surface structure, and a guide rod that slides through the mounting plate is fixedly mounted in the mounting cavity of the device shell.

[0013] Preferably, the smearing mechanism includes a positioning clamp rotatably mounted on the end of the injection tube away from the device housing, a discharge block is fixedly mounted on the outer side of the positioning clamp, the outer side of the discharge block is an arc-shaped structure, a plurality of discharge holes symmetrically distributed in the center are provided on the outer side of the discharge block, a docking rod is fixedly mounted on the inner side of the discharge block, a docking hole for the docking rod to slide through is provided on the outer side of the rubber piston, a socket is mounted on the end of the screw rod close to the limit plate, the end of the docking rod away from the discharge block contacts the outer side of the socket, an insert block is fixedly mounted on the end of the docking rod away from the discharge block, the insert block is a prismatic structure, and the insert block is limitedly inserted into the inner side of the socket.

[0014] Preferably, a rubber sheath is fixedly mounted on the outer side of the grip tube, and an anti-slip pressure plate is fixedly mounted on one end of the pressure rod away from the U-shaped frame.

[0015] Preferably, a sealing sleeve is slidably mounted on the outer side of the injection tube, a positioning rib is fixedly mounted on the inner side of the sealing sleeve, and an annular groove for limiting insertion of the positioning rib is provided on the outer side of the device housing.

[0016] Preferably, two symmetrically distributed limiting slides are fixedly mounted on the outer side of the U-shaped frame, and a limiting slide groove for limiting the sliding of the limiting slides is provided on the inner side of the grip tube.

[0017] Preferably, the U-shaped frame is connected to the first synchronous belt via 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, and the second synchronous belt is located on the inner side of the protective box.

[0019] Preferably, a plurality of guide blocks symmetrically distributed in the center are fixedly mounted on the outer side of the inserting tube, and a guide groove for limiting insertion of the guide blocks is provided in the annular slot of the device housing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention can set the thrust of the rubber piston on the outside of the device housing through the drug delivery mechanism, so that the device housing and the grip tube form an L-shaped structure, which is convenient for patients to insert the syringe into the wound with one hand, and is convenient for patients of different body shapes to use. It solves the problem that traditional applicators are difficult to operate, reduces the pain of patients in applying medicine, and thus improves the convenience of anal application of medicine.

[0022] 2. The present invention uses a tube-loading mechanism to first inject the ointment into the inner side of the injection tube, and then insert the insert sleeve on the injection tube into the annular slot of the device housing. By utilizing the movement of the rubber piston, the clamping block can be inserted into the clamping hole of the insert sleeve to achieve the positioning of the insert sleeve, thereby quickly installing the injection tube and improving the convenience of ointment injection, thereby achieving the effect of fast installation and flexible control of drug dosage.

[0023] 3. The present invention uses a smearing mechanism, which can drive the docking rod to rotate when the rubber piston pushes the ointment in the injection tube, so that the discharge block is in a rotating state, which facilitates the discharge block to discharge the ointment from the discharge hole of the discharge block in a rotating state, so that the ointment can be evenly applied to the patient's wound, thereby achieving the effect of uniform application of the medicine. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 This is a schematic diagram of the mounting box and grip structure of the present invention;

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

[0027] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A in the middle;

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

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

[0030] Figure 7 This is a schematic diagram of the structure of the insert tube and the insert block in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the docking rod and the discharge block in the present invention.

[0032] In the figure: 1. Device housing; 2. Injection tube; 3. Grip tube; 4. Rubber piston; 5. Mounting box; 6. Follower rod; 7. Positioning rod; 8. First synchronous belt; 9. U-shaped frame; 10. Pressure rod; 11. Limiting plate; 12. Screw; 13. Second synchronous belt; 14. Support rod; 15. Moving block; 16. Insertion tube; 17. Mounting plate; 18. Block; 19. Push column; 20. Ring; 21. Spring; 22. Guide rod; 23. Positioning snap ring; 24. Discharge block; 25. Docking rod; 26. Socket; 27. Insert block; 28. Rubber sheath; 29. ​​Sealing sleeve; 30. Positioning rib; 31. Limiting slide; 32. Articulated block; 33. Protective box; 34. Guide block; 35. Anti-slip pressure plate. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1-8 The figure shows an anal medicine applicator suitable for local treatment of ulcerative colitis, comprising a device housing 1 and a syringe 2 installed at the end of the device housing 1. A grip tube 3 is provided on the outside of the device housing 1, and an L-shaped structure is formed between the grip tube 3 and the device housing 1, so that the patient can hold the grip tube 3 to insert the syringe 2 at the end of the device housing 1 into the anus, thereby improving the convenience of inserting the syringe 2 and being suitable for patients of more body shapes. A rubber piston 4 is slidably installed on the inner side of the device housing 1, and when the rubber piston 4 moves, the ointment in the syringe 2 can be discharged. The inner diameter of the syringe 2 is the same as the inner diameter of the device housing 1, and the syringe 2 is far One end of the device housing 1 is an arc-shaped structure, which facilitates the insertion of the syringe 2 into the anus. A sealing sleeve 29 is slidably installed on the outside of the syringe 2, so that the sealing sleeve 29 provides protection for the syringe 2 and facilitates storage and sealing. A positioning rib 30 is fixedly installed on the inside of the sealing sleeve 29. An annular groove for limiting the insertion of the positioning rib 30 is opened on the outside of the device housing 1. Pulling the sealing sleeve 29 can remove the positioning rib 30 from the annular groove on the outside of the device housing 1, facilitating quick installation and removal of the sealing sleeve 29. It also includes: a drug delivery mechanism for improving the convenience of applying medicine to the syringe 2, and the drug delivery mechanism is installed between the device housing 1 and the handle 3.

[0035] The dosing mechanism includes a mounting box 5 fixedly mounted on the outside of the device housing 1, a driven rod 6 is rotatably mounted on the inner side of the mounting box 5, a grip tube 3 is fixedly mounted on the outside of the mounting box 5, a positioning rod 7 is rotatably mounted on the inner side of the grip tube 3, a first synchronous belt 8 is rotatably mounted between the positioning rod 7 and the driven rod 6, and when the positioning rod 7 rotates, the driven rod 6 can be driven to rotate by the first synchronous belt 8, a U-shaped frame 9 is provided on the inner side of the grip tube 3, one end of the U-shaped frame 9 is mounted on the outer side of the first synchronous belt 8, and 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, the first synchronous belt 8 can be pushed to rotate and move by the hinge block 32, so that the first synchronous belt 8 cooperates with the positioning rod 7 The driven rod 6 is driven to rotate, and the inner side of the U-shaped frame 9 contacts the outer side of the first synchronous belt 8, so that the U-shaped frame 9 can move along the outer side of the first synchronous belt 8 when it moves, providing auxiliary positioning for the first synchronous belt 8. Two symmetrically distributed limit slides 31 are fixedly installed on the outer side of the U-shaped frame 9, and a limit slide groove for the limit slide 31 to limit the sliding of the limit slide 31 is opened on the inner side of the grip tube 3. When the U-shaped frame 9 moves, it can drive the limit slide 31 to move along the limit slide groove of the grip tube 3, thereby improving the stability of the movement of the U-shaped frame 9. A pressure rod 10 is fixedly installed on the top of the U-shaped frame 9, and the pressure rod 10 slides and extends to the outer side of the grip tube 3. The patient presses the pressure rod 10 to drive the U-shaped frame 9 to move, and the grip tube 3 is fixedly installed with a rubber sheath 28, and an anti-slip pressure plate 35 is fixedly installed on the end of the pressure rod 10 away from the U-shaped frame 9, so that the patient can hold the rubber sheath 28 and press the anti-slip pressure plate 35, which can push the pressure rod 10 to move downward, thereby improving the convenience of pressing the pressure rod 10. A limit plate 11 is fixedly installed on the inner side of the device housing 1, and a screw 12 is rotatably installed between the inner side of the device housing 1 and the limit plate 11. One end of the screw 12 extends to the outside of the device housing 1, and a second synchronous belt 13 is rotatably installed between the screw 12 and the driven rod 6. When the driven rod 6 rotates, the screw 12 can be driven to rotate synchronously through the second synchronous belt 13. The outer side of the mounting box 5 is fixedly installed with the device housing 1 A protective box 33 is fixedly installed between the outer sides, one end of the driven rod 6 extends to the inner side of the protective box 33, and the second synchronous belt 13 is located on the inner side of 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 12, so that the rotation speed of the screw 12 is greater than the rotation speed of the driven rod 6. Two support rods 14 that slide symmetrically through the limit plate 11 are fixedly installed on the top of the rubber piston 4. A moving block 15 that cooperates with the screw 12 is fixedly installed between the two support rods 14. When the screw 12 rotates, the rubber piston 4 can be driven by the moving block 15 and the support rod 14 to move along the inner side of the device housing 1 to push out the ointment in the injection tube 2.

[0036] Example 2: Please refer to Figure 5-Figure 8, this embodiment further explains the first embodiment, the tube installation mechanism shown in the figure includes an insert 16 fixedly installed on the injection tube 2 near one end of the device housing 1, and an annular slot for limiting the insertion of the insert 16 is provided on the outside of the device housing 1. The insert 16 on the injection tube 2 can be inserted into the annular slot of the device housing 1 to achieve rapid docking of the injection tube 2. The interior of the device housing 1 is provided with a plurality of installation cavities that are centrally symmetrically distributed. A mounting plate 17 is slidably installed on the inner side of the installation cavity. A clamping block 18 is fixedly installed on the side of the installation plate 17 near the insert 16, and a clamping block 18 is provided on the outer side of the insert 16. When the card block 18 is inserted into the card hole of the insert tube 16, the insert tube 16 can be fixed in the annular slot of the device housing 1, and the injection tube 2 can be fixed to the end of the device housing 1. A push column 19 is fixedly installed on the side of the mounting plate 17 close to the card block 18, and a collar 20 is fixedly installed on the outside of the push column 19. A sliding cavity for limiting the sliding of the push column 19 and the collar 20 is opened on the inner side of the mounting cavity of the device housing 1. The push column 19 can move the collar 20 along the 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 column 19 moves, it can pass through the collar 20. 0 stretches the spring 21, and the rebound force of the spring 21 can be used to quickly reset the push column 19. The end of the push column 19 away from the mounting plate 17 contacts the outside of the rubber piston 4. When the rubber piston 4 contacts one end of the push column 19, it can drive the collar 20 to stretch the spring 21. When the rubber piston 4 is away from the push column 19, the rebound force of the spring 21 can be used to make the push column 19 pull the mounting plate 17 to move, and the block 18 on the mounting plate 17 can be inserted into the card hole of the insert 16. The end of the push column 19 close to the rubber piston 4 is an arc-shaped structure, and the top of the rubber piston 4 is an arc-shaped inclined surface. The structure is convenient for the rubber piston 4 to push the push column 19 to move along the sliding cavity of the device housing 1. A guide rod 22 that slides through the mounting plate 17 is fixedly installed in 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 that are centrally symmetrically distributed are fixedly installed on the outside of the insert 16. A guide groove for the guide block 34 to be limited and inserted is provided in the annular slot of the device housing 1, so that when the insert 16 is inserted into the annular slot of the device housing 1, the guide block 34 on the outside of the insert 16 can be inserted into the guide groove of the annular slot, which facilitates the alignment of the card hole on the insert 16 with the card block 18.

[0037] Example 3: Please refer to Figure 5-Figure 8, this embodiment further explains other embodiments. The smearing mechanism shown in the figure includes a positioning clamp 23 rotatably mounted on the end of the injection tube 2 away from the device housing 1. A discharge block 24 is fixedly mounted on the outside of the positioning clamp 23, so that when the discharge block 24 rotates, it can drive the positioning clamp 23 to rotate along the inner side of the injection tube 2. The outer side of the discharge block 24 is an arc-shaped structure, which makes it convenient for the discharge block 24 to press against the patient's anus, so that the arc surface of the discharge block 24 opens the patient's anus, and improves the convenience of inserting the injection tube 2 into the anus. A plurality of discharge holes are provided on the outside of the discharge block 24 in a centrally symmetrical distribution, so that when the rubber piston 4 moves, the ointment in the injection tube 2 can be discharged from the discharge hole of the discharge block 24. The inner side of the discharge block 24 is fixedly mounted with a pair of The connecting rod 25 and the outer side of the rubber piston 4 are provided with a docking hole for the docking rod 25 to slide through, so that when the rubber piston 4 moves, it can move along the outer side of the docking rod 25, and the end of the screw 12 close to the limit plate 11 is installed with a socket 26, and the end of the docking rod 25 away from the discharge block 24 is in contact with the outer side of the socket 26, and the end of the docking rod 25 away from the discharge block 24 is fixedly installed with an insert block 27, which is a prismatic structure. The insert block 27 is limited and inserted into the inner side of the socket 26, so that when the screw 12 rotates, the insert block 27 can be driven to rotate through the socket 26, and the insert block 27 drives the connecting rod 25 to rotate, thereby realizing the rotation of the discharge block 24, so that the ointment can be applied to the wound on the patient's anus in a rotating state, thereby improving the uniformity of the ointment application.

[0038] Working principle: First, the patient pulls the sealing sleeve 29 to pull the positioning rib 30 on the sealing sleeve 29 out of the annular groove on the device housing 1, and removes the sealing sleeve 29 from the injection tube 2. Then, the patient holds the handle 3 and pulls the pressure rod 10 to move, so that the pressure rod 10 drives the U-shaped frame 9 to move, and 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, and the driven rod 6 drives the screw 12 to rotate through the second synchronous belt 13, and the screw 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 pushes 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, and the rubber piston 4 pushes the push column 19 to move along 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 card block 18 out of the card hole of the insert cylinder 16. At this time, the patient releases the pressure rod 10 and pulls the insert cylinder 16 on the injection tube 2 out of the annular card groove of the device housing 1. Subsequently, the patient injects a quantitative ointment into the injection tube 2 to achieve a quantitative injection of the ointment, and then inserts the insert cylinder 16 into the annular slot of the device housing 1 again and The guide block 34 on the insert tube 16 is inserted into the guide groove of the annular slot, so that the multiple card holes on the insert tube 16 are aligned one by one with the multiple card blocks 18. At the same time, the docking rod 25 on the discharge block 24 is close to the socket 26 on the screw rod 12, so that the insert 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. The rebound force of the spring 21 is used to make the collar 20 pull the push column 19 to reset. The mounting plate 17 can then insert the card block 18 into the card hole of the insert tube 16, thereby realizing the rapid installation of the syringe 2. Finally, the patient holds the grip tube 3. Insert the syringe 2 into the anus so that the discharge block 24 on the syringe 2 pushes open the anus and approaches the wound. At this time, the patient presses the pressure rod 10 again to make the rubber piston 4 push the ointment in the syringe 2 to be discharged from the discharge hole of the discharge block 24. At the same time, the screw 12 drives the plug block 27 to rotate through the socket 26, so that the plug block 27 drives the discharge block 24 to rotate through the docking rod 25. The ointment can be discharged from the discharge hole in a rotating state, so that the ointment can be evenly applied to the wound, thereby achieving the effect of uniform medicine application, improving the convenience of medicine application, reducing the pain of patients in applying medicine, and being suitable for patients of more body types.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. An anal medication applicator suitable for local treatment of ulcerative colitis, characterized in that: include: A device housing (1) and an injection tube (2) mounted on the end of the device housing (1); a grip tube (3) is provided on the outside of the device housing (1); an L-shaped structure is formed between the grip tube (3) and the device housing (1); a rubber piston (4) is slidably mounted on the inside of the device housing (1); Also includes: A drug delivery mechanism is used to improve the convenience of applying the drug to the injection tube (2), the drug delivery mechanism is installed between the device housing (1) and the grip tube (3), the drug delivery mechanism includes a mounting box (5) mounted on the outside of the device housing (1), a driven rod (6) is rotatably mounted on the inner side of the mounting box (5), a positioning rod (7) is rotatably mounted on the inner side of the grip tube (3), a first synchronous belt (8) is rotatably mounted between the positioning rod (7) and the driven rod (6), a U-shaped frame (9) is provided on the inner side of the grip tube (3), and one end of the U-shaped frame (9) is mounted A pressure rod (10) is fixedly installed on the top of the U-shaped frame (9) on the outside of the first synchronous belt (8), a limit plate (11) is installed on the inside of the device housing (1), a screw rod (12) is rotatably installed between the inside of the device housing (1) and the limit 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 on the top of the rubber piston (4), and a moving block (15) that cooperates with the screw rod (12) is fixedly installed between the two support rods (14); A tube installation mechanism is used for quickly installing and removing the injection tube (2), and the tube installation mechanism is installed between the device housing (1) and the injection tube (2). The tube installation mechanism includes an insert tube (16) installed on one end of the injection tube (2) close to the device housing (1), an annular slot is provided on the outer side of the device housing (1), a mounting plate (17) is slidably installed on the inner side of the device housing (1), a clamping block (18) is fixedly installed on one side of the mounting plate (17) close to the insert tube (16), a clamping hole is provided on the outer side of the insert tube (16), a push column (19) is fixedly installed on one side of the mounting plate (17), a collar (20) is installed on the outer side of the collar (20), a spring (21) is installed on the outer side of the collar (20), and one end of the push column (19) contacts the outer side of the rubber piston (4); A coating mechanism is used to evenly coat the injection tube (2) with medicine, and the coating mechanism is installed on the inner side of the injection tube (2).

2. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: The smearing mechanism includes a positioning clamp (23) rotatably mounted on one end of the injection tube (2), a discharge block (24) is mounted on the outer side of the positioning clamp (23), the outer side of the discharge block (24) is an arc-shaped structure, a plurality of discharge holes are opened on the outer side of the discharge block (24), a docking rod (25) is mounted on the inner side of the discharge block (24), a socket (26) is mounted on one end of the screw (12), an insert block (27) is fixedly mounted on one end of the docking rod (25), the insert block (27) is a prismatic structure, and the insert block (27) is limitedly plugged into the inner side of the socket (26).

3. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: A rubber sheath (28) is fixedly mounted on the outer side of the grip tube (3), and an anti-slip pressure plate (35) is fixedly mounted on one end of the pressure rod (10).

4. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: A sealing sleeve (29) is slidably mounted on the outside of the injection tube (2), a positioning rib (30) is fixedly mounted on the inside of the sealing sleeve (29), and an annular groove is provided on the outside of the device housing (1).

5. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: Two limiting slide bars (31) are fixedly mounted on the outer side of the U-shaped frame (9), and two limiting slide grooves are provided on the inner side of the grip tube (3).

6. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: The U-shaped frame (9) is connected to the first synchronous belt (8) via a hinge block (32).

7. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: 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 on the inner side of the protective box (33).

8. The anal medication applicator for local treatment of ulcerative colitis according to claim 1, characterized in that: A plurality of guide blocks (34) are fixedly mounted on the outer side of the inserting cylinder (16), and a guide groove is provided in the annular slot of the device housing (1).

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