Ointment administration device

Abstract

The utility model belongs to the technical field of medicine applying and smearing, and particularly relates to an ointment applicator which comprises an injection head, an injection cylinder and a piston push rod, the injection cylinder is in a hollow cylinder shape and is of a structure with an inner cylinder and an outer cylinder, the inner layer is a medicine storage cavity, and the outer layer is a cooling cavity. During use, before medicine is prepared to be applied to an affected part, the sleeve between the inner layer and the outer layer is rotated until the protruding part in the cooling cavity punctures the sealing film of the end cover, so that a reactant in the outer layer barrel body is in contact with a reactant in the end cover, an endothermic reaction is generated, heat of ointment is taken away, the temperature of the ointment to be applied is reduced, and a cool feeling is achieved in the application process. When the drug delivery device is used, the used plaster can be cooled anytime and anywhere according to the using time of a patient, the drug delivery device is not limited by the environment and can be more conveniently and rapidly used, and the drug delivery effect on the affected part is better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to medicine smearing technical field, especially relate to a medicine ointment applicator. BACKGROUND

[0002] Hemorrhoids is a common disease located in the anal part, any age can be attacked, but with age growth, the morbidity gradually increases, the recovery of hemorrhoids patient after receiving surgical treatment is extremely important. Hemorrhoids ointment usually contains some cooling ingredients, such as borneol, the effect of these ingredients is mainly to provide temporary "analgesic comfort" effect, help to relieve the discomfort caused by hemorrhoids. The cooling effect can relieve local pain and swelling, and bring certain comfort to patients.

[0003] But when using the ointment containing borneol, the following situations should be paid attention to: borneol and musk can have adverse effects on fetal development, and even cause abortion, so pregnant women and lactating women are prohibited from using it; if skin allergy occurs after using the ointment containing borneol, such as itching and rash, it should be stopped immediately; if the patient's skin is broken or infected, the ointment containing borneol should be avoided to prevent the skin condition from getting worse. For the above-mentioned hemorrhoids patients, only ointment without borneol ingredients can be used, and the ointment should be refrigerated before use, but long-term refrigeration also leads to the problem that the ointment is difficult to squeeze out after solidification. SUMMARY

[0004] In order to solve the above-mentioned technical problems, the utility model provides a medicine ointment applicator, which comprises a medicine ointment syringe composed of a medicine delivery tube, an injection tube and a piston push rod, the medicine delivery tube is integrally connected to the distal end of the injection tube, and the piston push rod is embedded in the injection tube from the proximal end of the injection tube, characterized in that an outer cylinder is arranged outside the injection tube, the distal end of the outer cylinder is integrally connected with the distal end of the injection tube to form a closed end, an annular cavity is formed between the outer cylinder and the injection tube, a sleeve is installed at the proximal end of the annular cavity, the sleeve can move in the annular cavity in the advancing direction of the piston push rod, a ring groove is formed on the side of the sleeve facing the annular cavity, a sealing film is further arranged in the ring groove or the annular cavity, a closed space formed after the edge of the sealing film is connected with the ring groove or the annular cavity contains water, and the ring groove or the annular cavity not connected with the edge of the sealing film contains urea, and the axial length of the injection tube is not less than the axial length of the outer cylinder.

[0005] Further, the closed end is connected to a protruding part extending into the annular cavity, the inner periphery of the sleeve is slidingly connected with the outer periphery of the injection tube, and the outer periphery of the sleeve is slidingly connected with the outer cylinder through threads, and the edge of the sealing film is connected with the ring groove.

[0006] Furthermore, the edge of the sealing film is connected to the inner circumference of the annular cavity, the end of the annular groove is provided with a protrusion facing the annular cavity, the inner circumference of the sleeve is slidably connected to the outer circumference of the injection tube, and the outer circumference of the sleeve is slidably connected to the outer cylinder body by threads.

[0007] Furthermore, the length of the sleeve is greater than the distance between the protrusion and the near end face of the outer cylinder.

[0008] Furthermore, the distance from the protrusion to the near end of the sleeve is greater than the distance from the sealing film to the near end of the outer cylinder.

[0009] Furthermore, the inner wall of the outer cylinder is provided with an internal thread section, and the outer circumference of the sleeve is provided with an external thread section, with the external thread section of the sleeve and the internal thread section of the inner wall of the outer cylinder undergoing transition fit.

[0010] Furthermore, the sleeve is fitted with a plurality of sealing rings on its outer periphery, and the sealing rings are located on the end face of the sleeve near the annular groove on its outer periphery.

[0011] Furthermore, the protrusion is arranged circumferentially and has a pointed tip facing the sealing film, which can pierce the sealing film.

[0012] Furthermore, a pair of symmetrical booster plates are provided at the closed end along the radial direction of the outer cylinder.

[0013] Compared to existing technologies, the advantages of this invention lie in the addition of a cooling chamber (the annular cavity of this invention) to the external part of the existing injection device. This annular cavity is equipped with a sleeve that is sealed to it. The sleeve contains water, and the annular cavity contains urea. The ointment-like medication to be applied is filled into the injection tube, and a piston rod is installed. Before applying the medication to the affected area, the sleeve is rotated until the sealing film is punctured, allowing the urea to come into contact with the water and undergo an endothermic reaction. This reaction carries away the heat from the ointment in the injection tube, lowering the temperature of the ointment and providing a cooling sensation during application. When using this applicator, the ointment can be cooled and applied anytime, anywhere, depending on the patient's needs. This is not limited by the environment, making it more convenient and faster, and resulting in better drug delivery to the affected area. Furthermore, the ointment does not require the addition of cooling ingredients with usage restrictions, such as borneol, avoiding the inconvenience of refrigerating the ointment before application and the difficulty in controlling the temperature and time of refrigeration. Therefore, using this applicator allows for the cooling and application of the ointment anytime, anywhere, depending on the patient's needs, making it more convenient and faster, and resulting in better drug delivery to the affected area. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 As in Example 1 Figure 1Schematic diagram of the cross section in the AA direction;

[0016] Figure 3 As in Example 1 Figure 2 Schematic diagram of the cross section in the BB direction;

[0017] Figure 4 As in Example 1 Figure 3 Length marking diagram of the structural schematic;

[0018] Figure 5 Example 2 Figure 1 Schematic diagram of the cross section in the AA direction.

[0019] Among them, 1-administration tube, 2-injection cylinder, 3-piston push rod, 4-sleeve, 6-sealing ring, 7-annular cavity, 8-protrusion, 9-annular groove, 11-through hole, 21-injection tube, 22-outer cylinder, 23-closed end, 24-opening, 25-push plate, 26-internal thread section, 41-annular base plate, 42-inner sidewall, 43-outer sidewall, 44-sealing film, 45-external thread section. Detailed Implementation

[0020] The following are specific embodiments of this utility model, described in conjunction with the accompanying drawings, to further illustrate the technical solution of this utility model. However, this utility model is not limited to these embodiments. It should be noted that in this utility model, the proximal end refers to the side of the ointment applicator closer to the person when the person holds the applicator, and the distal end refers to the side of the ointment applicator farther from the person when the person holds the applicator.

[0021] Example 1

[0022] like Figures 1 to 4 As shown, a medicated ointment delivery device includes an ointment syringe assembled from an administration tube 1, an injection tube 21, and a piston rod 3. The administration tube 1 is integrally connected to the distal end of the injection tube 21, and the piston rod 3 is inserted into the injection tube 21 from the proximal end of the injection tube 21.

[0023] The piston push rod 3 includes a cylindrical rod 31 and a pressing plate 32 located near the proximal end of the rod 31. The cylindrical rod 31 is clearance-fitted with the inner circumferential wall of the injection tube 21, and the cylindrical rod 31 is in a sealed sliding connection with the injection tube 21. Multiple sealing rings 6 are sleeved on the outer circumference of the distal end of the cylindrical rod 31. When the piston push rod 3 slides back and forth within the injection tube 21, the sealing rings 6 on the piston push rod 3 are compressed by the inner wall of the injection tube 21, resulting in a sealed sliding connection between the piston push rod 3 and the inner wall of the injection tube 21. The length of the cylindrical rod 31 of the piston push rod 3 is greater than the length of the injection tube 21.

[0024] The injection tube 21 is in the shape of a hollow cylinder. The injection head 1 has a through hole 11. The injection tube 21 stores ointment. The through hole 11 is connected to the opening 24 at the far end of the injection tube 21. The piston rod 3 is used to push out the ointment.

[0025] An outer cylindrical body 22 is provided outside the injection tube 21. The distal end of the outer cylindrical body 22 is connected to the distal end of the injection tube 21 to form a closed end 23. An annular cavity 7 is formed between the outer cylindrical body 22 and the injection tube 21. The axial length of the injection tube 21 is not less than the axial length of the outer cylindrical body 22. The outer cylindrical body 22 and the injection tube 21 form an inner and outer double-layer structure of the injection tube 2. The space between the outer cylindrical body 22 and the injection tube 21 is used to cool the ointment stored in the injection tube 21.

[0026] A sleeve 4 is installed at the proximal end of the annular cavity 7. The sleeve 4 can move in the annular cavity 7 along the pushing direction of the piston rod 3. The inner wall of the outer cylinder 22 has an internal thread section 26 near the proximal end. An annular groove 9 is opened on the side of the sleeve 4 facing the annular cavity 7. A sealing film 44 is also provided in the annular groove 9. The closed space formed by the edge of the sealing film 44 and the annular groove 9 contains water. The annular cavity 7 contains urea.

[0027] The closed end 23 is connected to the protrusion 8 extending to the annular cavity 7. The inner circumference of the sleeve 4 is slidably connected to the outer circumference of the injection tube 21. The outer circumference of the sleeve 4 is slidably connected to the outer cylinder 22 by threads. The length of the sleeve 4 is greater than the distance between the protrusion 8 and the near end face of the outer cylinder 22, so that before the sleeve 4 is fully pushed into the annular cavity 7, the protrusion 8 can pierce the sealing film 44.

[0028] Preferred, such as Figure 1 and Figure 2 As shown, a pair of symmetrical booster plates 25 are arranged at the closed end 23 along the radial direction of the outer cylinder 22.

[0029] like Figure 3 As shown, the sleeve 4 has a hollow annular cross-section. The sleeve 4 includes an annular base plate 41 and an inner sidewall 42 and an outer sidewall 43 vertically arranged on the inner and outer circumferences of the annular base plate 41. The inner sidewall 42 and the outer sidewall 43 have the same axial length and the same central axis. An annular sealing film 44 is provided on the open end faces of the inner sidewall 42 and the outer sidewall 43, enclosing the inner sidewall 42 and the outer sidewall 43 on the end cap 4 to form an annular groove 9. After the end cap 4 is inserted into the annular cavity 7, the sleeve 4 isolates the annular cavity 7 from the outside.

[0030] The outer diameter of the outer sidewall 43 is smaller than the outer diameter of the annular base plate 41 of the sleeve 4, and the outer diameter of the annular base plate 41 of the sleeve 4 is larger than the inner diameter of the inner circumferential wall of the outer cylinder 22, so that after the sleeve 4 is inserted into the annular cavity 7, the annular base plate 41 of the sleeve 4 is blocked outside the annular cavity 7. The inner sidewall 42 of the sleeve 4 fits against the outer wall of the injection tube 21, and the inner sidewall 42 of the sleeve 4 and the outer wall of the injection tube 21 are in a sealed sliding connection. The outer circumference of the outer sidewall 43 of the sleeve 4 is provided with an external thread section 45, which transitionally fits with the internal thread section 26 of the inner circumferential wall of the outer cylinder 22.

[0031] Multiple sealing rings 6 are fitted onto the outer sidewall 43 of the sleeve 4. The sealing rings 6 are close to the distal end face of the outer sidewall 43 and away from the sleeve 4. When the sleeve 4 is inserted into the annular cavity 7 and rotates and slides relative to it, the sealing rings 6 on the outer sidewall 43 of the sleeve 4 are squeezed by the cylinder wall of the outer cylinder 22, so that the surfaces of the sleeve 4 and the outer cylinder 22 in contact are sealed and slidably connected. Figure 4 As shown, the axial length L1 of the outer cylinder 22 is less than the sum of the axial length L2 of the outer sidewall 43 of the sleeve 4 and the axial length L5 of the protrusion 8. In this way, the sealing film 44 of the sleeve 4 can be punctured by the cone 5.

[0032] Rotate the sleeve 4 so that it spirals forward into the annular cavity 7. The protrusion 8 punctures the sealing film 44 fixed on the distal end face of the sleeve 4, allowing the water in the sleeve 4 and the urea stored in the annular cavity 7 to come into contact, thereby causing an endothermic reaction and cooling the ointment in the injection tube 21.

[0033] Before use, connect the sleeve 4 to the outer cylinder 22 via threads. The sleeve 4 contains water, and the annular cavity 7 contains urea. Fill the injection tube 21 with the ointment to be applied and attach the piston rod. Before applying the ointment to the affected area, rotate the sleeve 4 until the sealing film is punctured, allowing the urea to come into contact with the water and undergo an endothermic reaction, carrying away the heat from the ointment in the injection tube 21, thus lowering the temperature of the ointment and providing a cooling sensation during application. When using this applicator, the ointment can be cooled anytime, anywhere, depending on the patient's needs, without environmental limitations. This makes it more convenient and faster, resulting in better drug delivery to the affected area. Furthermore, the ointment does not require the addition of cooling ingredients with usage restrictions, such as camphor.

[0034] Example 2

[0035] like Figure 1 and Figure 5The ointment delivery device shown includes an ointment syringe assembled from an administration tube 1, an injection tube 21, and a piston rod 3. The administration tube 1 is integrally connected to the distal end of the injection tube 21. The piston rod 3 is inserted into the injection tube 21 from the proximal end. An outer cylindrical body 22 is provided outside the injection tube 21. The distal end of the outer cylindrical body 22 is integrally connected with the distal end of the injection tube 21 to form a closed end 23. An annular cavity 7 is formed between the outer cylindrical body 22 and the injection tube 21. A sleeve 4 is installed at the proximal end of the annular cavity 7. The sleeve 4 can move in the annular cavity 7 along the pushing direction of the piston rod 3. An annular groove 9 is opened on the side of the sleeve 4 facing the annular cavity 7. A sealing film 44 is also provided in the annular cavity 7. The sealed space formed by connecting the edge of the sealing film 44 to the inner circumference of the annular cavity 7 contains water. The annular groove 9 contains urea. The axial length of the injection tube 21 is not less than the axial length of the outer cylindrical body 22.

[0036] The annular groove 9 has a protrusion 8 at its end facing the annular cavity 7. The inner circumference of the sleeve 4 is slidably connected to the outer circumference of the injection tube 21, and the outer circumference of the sleeve 4 is slidably connected to the outer cylinder 22 via threads. The distance from the protrusion 8 to the proximal end of the sleeve 4 is greater than the distance from the sealing film 44 to the proximal end of the outer cylinder 22. Multiple sealing rings 6 are fitted around the outer circumference of the sleeve 4, and the sealing rings 6 are located on the end face of the outer circumference of the sleeve 4 near the annular groove 9. The protrusion 8 is arranged circumferentially and has a pointed tip facing the sealing film 44, which can pierce the sealing film 44. A pair of symmetrical pusher plates 25 are arranged radially along the outer cylinder 22 at the closed end 23.

Claims

1. A medicated ointment applicator, comprising an ointment syringe assembled from an administration tube (1), an injection tube (21), and a piston rod (3), wherein the administration tube (1) is integrally connected to the distal end of the injection tube (21), and the piston rod (3) is inserted into the injection tube (21) from the proximal end, characterized in that, An outer cylindrical body (22) is provided outside the injection tube (21). The distal end of the outer cylindrical body (22) is connected to the distal end of the injection tube (21) to form a closed end (23). An annular cavity (7) is formed between the outer cylindrical body (22) and the injection tube (21). A sleeve (4) is installed at the proximal end of the annular cavity (7). The sleeve (4) can move in the annular cavity (7) along the pushing direction of the piston rod (3). An annular groove (9) is opened on the side of the sleeve (4) facing the annular cavity (7). A sealing film (44) is also provided in the annular groove (9) or the annular cavity (7). The closed space formed after the edge of the sealing film (44) is connected to the annular groove (9) or the annular cavity (7) contains water. The annular groove (9) or the annular cavity (7) that is not connected to the edge of the sealing film (44) contains urea. The axial length of the injection tube (21) is not less than the axial length of the outer cylindrical body (22).

2. The ointment applicator according to claim 1, characterized in that, The closed end (23) is connected to the protrusion (8) extending into the annular cavity (7), the inner circumference of the sleeve (4) is slidably connected to the outer circumference of the injection tube (21), the outer circumference of the sleeve (4) is slidably connected to the outer cylinder (22) by threads, and the edge of the sealing film (44) is connected to the annular groove (9).

3. The ointment applicator according to claim 1, characterized in that, The edge of the sealing film (44) is connected to the inner circumference of the annular cavity (7), the end of the annular groove (9) is provided with a protrusion (8) facing the annular cavity (7), the inner circumference of the sleeve (4) is slidably connected to the outer circumference of the injection tube (21), and the outer circumference of the sleeve (4) is slidably connected to the outer cylinder (22) by a thread.

4. The ointment applicator according to claim 2, characterized in that, The length of the sleeve (4) is greater than the distance between the protrusion (8) and the near end face of the outer cylinder (22).

5. The ointment applicator according to claim 3, characterized in that, The distance from the protrusion (8) to the proximal end of the sleeve (4) is greater than the distance from the sealing film (44) to the proximal end of the outer cylinder (22).

6. The ointment applicator according to claim 1, characterized in that, The inner wall of the outer cylinder (22) is provided with an internal thread section (26), and the outer periphery of the sleeve (4) is provided with an external thread section (45). The external thread section (45) of the sleeve (4) and the internal thread section (26) of the inner wall of the outer cylinder (22) are in transition fit.

7. The ointment applicator according to claim 1, characterized in that, The sleeve (4) is fitted with a plurality of sealing rings (6) on its outer periphery. The sealing rings (6) are located on the end face of the sleeve (4) near the annular groove (9) on its outer periphery.

8. The ointment applicator according to any one of claims 2 to 3, characterized in that, The protrusion (8) is arranged circumferentially and has a pointed tip facing the sealing film (44) that can pierce the sealing film (44).

9. The ointment applicator according to claim 1, characterized in that, The closed end (23) is provided with a pair of symmetrical booster plates (25) along the radial direction of the outer cylinder (22).

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