Pressing type ointment extruder

Abstract

The pressing type ointment extruder comprises a protective shell, the protective shell is a cylindrical barrel, an ointment outlet pipe is arranged at the first end of the protective shell and communicated with the interior of the protective shell, the second end of the protective shell is open, a corrugated pipe and a sleeve are sequentially installed in the protective shell from the first end to the second end, and a detachable ointment loading pipe is arranged in the sleeve. The extrusion head of the paste tube is exposed out of one end of the sleeve, the annular tubular edges at the two ends of the corrugated tube are fixedly connected with the paste outlet tube at one end of the protective shell and the extrusion head respectively and are kept sealed, the sleeve is in sliding connection with the protective shell, and an elastic mechanism is further arranged in the protective shell and used for driving the corrugated tube to expand. One-way valves are arranged at the two ends of the corrugated pipe or in the ointment outlet pipe and the extrusion head respectively, the circulation direction of the one-way valves points to the first end of the protective shell, the compression and relaxation of the corrugated pipe are controlled by pressing the sleeve, so that the extrusion of ointment is controlled, a patient can easily extrude the ointment under the non-visual condition, and the operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to a press-type ointment extruder. Background Art

[0002] Oral administration is simple and convenient and is the preferred route for conventional drug therapy. However, for patients who are fasting or unable to take medication or have poor medication compliance, rectal administration is a safe alternative. Rectal administration is a method of delivering drugs through the anus into the intestine to release the drug to exert its effect, thereby treating systemic or localized diseases. Conventional rectal dosage forms can be divided into three categories: liquid dosage forms (such as enemas), solid dosage forms (such as suppositories, capsules, and tablets), and semisolid dosage forms (such as gels and ointments).

[0003] Among them, semi-solid dosage forms for rectal administration are commonly used to treat local anal diseases such as hemorrhoids and anal fissures. Local rectal administration can reduce edema, relieve symptoms, and alleviate pain. However, there are many problems with rectal administration of semi-solid dosage forms. First, for frail, elderly, or obese patients, the body position for rectal administration is not conducive to ointment injection, making it inconvenient for patients to use. Second, the amount of ointment squeezed out of rectal ointments is difficult to accurately quantify. The less ointment remains, the more difficult it is to control the amount squeezed out. Squeezing out too little ointment will result in insufficient drug dosage and affect the therapeutic effect, while squeezing out too much ointment will not only stain clothing but also cause drug waste. Third, after the drug is squeezed out of the ointment tube, it is difficult to squeeze out all the ointment remaining in the tube. Due to the special location of the ointment application, patients are reluctant to do it themselves. When the ointment in the tube is low and difficult to squeeze out, patients often discard the tube with some ointment remaining, resulting in a large amount of waste and environmental pollution. Therefore, in the care of local perianal diseases, there is a need for an ointment squeezer that is simple and easy for all types of patients to operate by themselves under non-visual conditions, so that patients can squeeze out as much ointment as possible from the ointment tube without residue. At the same time, the amount squeezed out each time is accurate, so as to maximize the number of uses of the ointment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the utility model aims to provide a press-type ointment squeezer, which is easy for patients to squeeze out the ointment in a quantitative manner without visual inspection and is easy to operate.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A press-type ointment extruder includes a protective shell, which is a cylindrical barrel. The first end of the protective shell is provided with an ointment discharge tube, which is connected to the protective shell. The second end of the protective shell is open. A bellows and a sleeve are installed in the protective shell from the first end to the second end. The sleeve is equipped with a detachable ointment tube. The extrusion head of the ointment tube is exposed from one end of the sleeve. The annular tubular edges at both ends of the bellows are respectively fastened to the ointment discharge tube at one end of the protective shell and the extrusion head, and maintain a seal. The sleeve is slidably connected to the protective shell. An elastic mechanism is also provided in the protective shell for driving the bellows to expand. One-way valves are respectively provided at both ends of the bellows or in the ointment discharge tube and the extrusion head. The flow direction of the one-way valve points to the first end of the protective shell.

[0007] Preferably, the first end of the protective shell is constructed as a detachable end cover, and the end cover is rotatable relative to the protective shell. A lumen is provided in the end cover, and the lumen extends out of the end cover to form a paste outlet tube. An annular groove surrounding the lumen is provided on the side of the end cover facing the protective shell, and the annular tubular edge of the end of the bellows can be embedded in the annular groove and have an interference fit with the annular groove.

[0008] Preferably, the end of the bellows facing the sleeve is connected to a joint pipe, which is also tightly connected to the outer periphery of the extrusion head of the paste tube loaded on the sleeve, and the joint pipe provides sealing conditions for the docking of the bellows and the extrusion head.

[0009] Preferably, a bottom cover is installed at one end of the sleeve away from the joint pipe, and the length of the sleeve and the corrugated pipe after being connected through the joint pipe is greater than the distance from the first end to the second end of the protective shell.

[0010] Furthermore, the elastic mechanism is a spring, which is sleeved on the outer periphery of the bellows or the outer periphery of the joint pipe. When the spring is installed on the outer periphery of the bellows, the two ends of the spring respectively abut against the end cover and the end of the bellows away from the end cover, so as to extend the bellows.

[0011] When the spring is installed on the outer periphery of the joint pipe, the two ends of the spring respectively abut against the limiting structure on the inner periphery of the protective shell and one end of the sleeve facing the joint pipe, so as to extend the bellows.

[0012] Furthermore, an annular baffle serving as the limiting structure is provided on the inner periphery of the protective shell. The distance between the annular baffle and the end cover allows the bellows to be accommodated between the annular baffle and the end cover in a non-compressed state. The inner diameter of the annular baffle is smaller than the diameter of the bellows, and is used to prevent the bellows from being pulled out of the annular groove by the spring.

[0013] Furthermore, the center axis of the cream outlet pipe is tilted relative to the center axis of the protective shell.

[0014] Furthermore, a circle of annular protrusions is provided in the middle of the outer circumference of the sleeve, and an annular groove is provided on the inner circumference of the protective shell. The outer circumference of the sleeve is embedded in the annular groove on the inner circumference of the protective shell. The length of the annular groove along the central axis of the protective shell is greater than the annular protrusion. When the sleeve is pressed, the sleeve slides along the annular groove inside the protective shell through the annular protrusion.

[0015] Furthermore, a one-way valve is provided in the lumen, and the one-way valve includes two valve flaps, which are arranged in an eight-shaped shape at one end of the lumen away from the paste outlet pipe. The cross-section of the inner circumference of the lumen is rectangular, the first ends of the two valve flaps are close to each other and the second ends of the relative valve flaps are close to the paste outlet pipe, the second ends of the two valve flaps are respectively connected to the parallel walls in the lumen, and the other two parallel walls in the lumen are in contact with and slidingly connected to the slender side surfaces between the first end and the second end of the two valve flaps. Under pressure-free conditions, the one-way valve is normally closed. When the bellows is pressed, pressure will be generated in the bellows, causing the first ends of the two valve flaps to separate. When the bellows is relaxed, negative pressure will be generated in the bellows, causing the first ends of the two valve flaps to contact each other.

[0016] The method of using the ointment extruder is as follows: disassemble the end cover, embed the circumferential edge of one end of the bellows into the annular groove of the end cover, then assemble the joint pipe on the other end of the bellows, and then reinstall the end cover with the bellows on the protective shell. Finally, push the sleeve loaded with the paste tube into the protective shell, and screw it to tighten the extrusion head of the paste tube and the joint pipe. Press the bottom cover of the sleeve, the bellows is compressed, pressure is generated inside the bellows, and the gas in the bellows is discharged. Then let go, the spring drives the bellows to relax, negative pressure is generated inside, and then the paste is sucked into the bellows through the one-way valve 2. When the bottom cover of the sleeve is pressed again, the bellows is compressed again, pressure is generated inside, and the paste is squeezed into the paste outlet tube and discharged through the paste outlet tube.

[0017] The utility model provides a press-type ointment extruder, which controls the extrusion of the ointment by pressing the compression and relaxation of the bellows controlled by the sliding shell, and the compression stroke of the bellows is fixed, so the ointment sucked in and squeezed out each time is quantitative. The structure is simple, and it is easy for hemorrhoid patients to rotate the ointment tube to aim at the affected area and squeeze the sleeve to squeeze out the ointment without visual conditions, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a diagram of a paste tube of the utility model;

[0020] Figure 3 This is a front sectional view of the utility model. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further explained in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 3 As shown, a press-type ointment extruder includes a protective shell 1 and a sleeve 7. The protective shell 1 is a cylindrical barrel. A lumen 12 is provided in the first end of the protective shell. The upper end of the lumen 12 extends out of the first end of the protective shell to form an ointment outlet tube 11. The second end of the protective shell 1 is open. A bellows 4 and a sleeve 7 are sequentially installed in the protective shell 1 from the first end to the second end. The sleeve 7 is slidably connected to the protective shell 1. The sleeve 7 is provided with a cavity 14 for loading the ointment tube 3. The cavity 14 opens toward the bellows 4. When the ointment tube 3 is loaded in the cavity 14, the extrusion head 6 of the ointment tube 3 extends from the opening of the cavity 14.

[0023] One end of the bellows 4 is connected to and communicated with the end of the tube cavity 12 away from the paste outlet pipe 11. A one-way valve 18 is provided in the tube cavity 12. The flow direction of the one-way valve 18 points to the end of the tube cavity 12 close to the paste outlet pipe 11. The other end of the bellows 4 is connected to the joint pipe 2. The joint pipe 2 is also tightly connected to the outer periphery of the extrusion head 6 of the paste tube 3 loaded on the sleeve 7. The joint pipe 2 provides sealing conditions for the docking of the bellows 4 and the extrusion head 6.

[0024] A second one-way valve is provided in the extrusion head 6 of the paste tube 3 or in the end of the bellows 4 connected to the connector tube 2 , and the flow direction of the second one-way valve points to the tube cavity 12 .

[0025] As a preferred implementation of this embodiment, the central axis of the ointment discharge tube 11 is tilted relative to the central axis of the protective shell 1, so that when the hemorrhoid patient holds the protective shell 1 by himself, it is convenient to operate the ointment discharge tube 11 to align with the affected area.

[0026] Furthermore, the first end of the protective shell 1 is configured as an end cap 13, which is detachably connected to the protective shell 1 and rotatable relative to the protective shell 1 to facilitate adjustment of the direction of the paste discharge tube 11. An annular groove 15 surrounding the lumen 12 is provided on the side of the end cap 13 facing the protective shell 1. The annular tubular edge of the end of the bellows 4 fits into the annular groove 15 and forms an interference fit therewith, facilitating sealing of the end of the bellows 4.

[0027] A spring 16 is sleeved on the outer periphery of the bellows 4 or the outer periphery of the joint pipe 2. When the spring 16 is installed on the outer periphery of the bellows 4, the two ends of the spring 16 respectively abut against the end cover 13 and the end of the bellows 4 away from the end cover 13, which is used to extend the bellows 4.

[0028] When the spring 16 is installed on the outer periphery of the joint pipe 2, the two ends of the spring 16 respectively abut against the limiting structure on the inner periphery of the protective shell 1 and the end of the sleeve 7 facing the joint pipe 2, so as to extend the bellows 4;

[0029] As a further improvement, an annular baffle 17 is provided on the inner circumference of protective shell 1 as a retaining structure. The spacing between baffle 17 and end cap 13 allows bellows 4 to be accommodated between them in an uncompressed state. The inner diameter of baffle 17 is smaller than that of bellows 4, preventing spring 16 from pulling bellows 4 out of annular groove 15.

[0030] The joint tube 2 is constructed with a threaded structure on the inner circumference, and can be threadedly connected to the end of the corrugated tube 4 away from the end cover 13 and the extrusion head 6 of the paste tube 3.

[0031] Therefore, the detachable connection between the end cover 13 and the protective shell 1 is beneficial for tightly connecting the bellows 4 with the annular groove 15 of the end cover 13 when the end cover 13 is removed. Then, after the end cover 13 is installed on the protective shell 1, it is convenient to tighten the extrusion head 6 of the paste tube 3 with the joint tube 2 at the lower end of the bellows 4 from the lower end of the protective shell 1.

[0032] Furthermore, the bellows 4 is made of a plastic elastic material and has elasticity. When pressed, pressure is generated in the bellows 4 , and when relaxed, negative pressure is generated in the bellows 4 .

[0033] Preferably, a bottom cover 8 is installed at the end of the sleeve 7 away from the joint tube 2, and the length of the sleeve 7 after being connected to the bellows 4 through the joint tube 2 is greater than the distance from the first end to the second end of the protective shell 1, so it is convenient for the patient to press the bottom cover 8 to make the sleeve 7 and the protective shell 1 slide relative to each other.

[0034] A circle of annular protrusions 9 is also provided in the middle of the outer periphery of the sleeve 7, and an annular groove 10 is provided on the inner periphery of the protective shell 1. The outer periphery of the sleeve 7 is embedded in the annular groove 10 on the inner periphery of the protective shell 1. The length of the annular groove 10 along the central axis direction of the protective shell 1 is greater than the annular protrusion 9. When the bottom cover 8 of the sleeve 7 is pressed, the sleeve 7 slides up and down inside the protective shell 1 along the annular groove 10 through the annular protrusion 9.

[0035] Furthermore, the one-way valve 18 includes two valve flaps, which are arranged in an eight-shaped shape at one end of the tube cavity 12 away from the paste outlet pipe 11. The cross-section of the inner circumference of the tube cavity 12 is rectangular. The first ends of the two valve flaps are close to each other and the second ends of the relative valve flaps are close to the paste outlet pipe 11. The second ends of the two valve flaps are respectively connected to the parallel walls in the tube cavity 12. The other two parallel walls in the tube cavity 12 are in contact with the slender side surfaces between the first end and the second end of the two valve flaps and are slidably connected. Under pressure-free conditions, the one-way valve 18 is normally closed. When the bellows 4 is pressed, pressure will be generated in the bellows 4, causing the first ends of the two valve flaps to separate. When the bellows 4 is relaxed, negative pressure will be generated in the bellows 4, causing the first ends of the two valve flaps to contact each other.

[0036] The method of using the present ointment extruder is as follows: disassemble the end cover 13, embed the annular edge of one end of the bellows 4 into the annular groove 15 of the end cover 13, and then assemble the joint tube 2 on the other end of the bellows 4, and then reinstall the end cover 13 on which the bellows 4 is installed on the protective shell 1, and finally push the sleeve 7 loaded with the paste tube 3 into the protective shell 1, and screw it to tighten the extrusion head 6 of the paste tube 3 and the joint tube 2, press the bottom cover 8 of the sleeve 7, the bellows 4 is compressed, pressure is generated in the bellows 4, and the gas in the bellows 4 is discharged, and then let go, the spring 16 drives the bellows 4 to relax, and negative pressure is generated inside, and then the paste is sucked into the bellows 4 through the one-way valve 2, and when the bottom cover 8 of the sleeve 7 is pressed again, the bellows 4 is compressed again, pressure is generated inside, and the paste is squeezed into the paste outlet tube 11 and discharged through the paste outlet tube 11.

[0037] The utility model provides a press-type ointment extruder, which changes the internal pressure of a bellows by pressing a sliding shell to complete the extrusion of the ointment. The structure is simple and it is easy for hemorrhoid patients to squeeze out the ointment themselves without visual inspection.

Claims

1. A press-type ointment extruder, characterized in that: The protective shell (1) comprises a protective shell (1), the protective shell (1) is a cylindrical barrel, a first end of the protective shell (1) is provided with a paste outlet pipe (11), the paste outlet pipe (11) is communicated with the protective shell (1), the second end of the protective shell (1) is open, a corrugated tube (4) and a sleeve (7) are sequentially installed in the protective shell (1) from the first end to the second end, a paste tube (3) is detachably loaded in the sleeve (7), an extrusion head (6) of the paste tube (3) is exposed from one end of the sleeve (7), and the corrugated tube (4) is provided with a plurality of screws. The annular tubular edges at both ends of the (4) are respectively fastened to the paste outlet pipe (11) at one end of the protective shell (1) and the extrusion head (6) and are kept sealed. The sleeve (7) is slidably connected to the protective shell (1). An elastic mechanism is also provided in the protective shell (1) for driving the bellows (4) to expand and contract. One-way valves are respectively provided at both ends of the bellows (4) or in the paste outlet pipe (11) and the extrusion head (6). The flow direction of the one-way valve points to the first end of the protective shell (1).

2. A press-type ointment extruder according to claim 1, characterized in that: The first end of the protective shell (1) is configured as a detachable end cap (13), and the end cap (13) is rotatable relative to the protective shell (1). A lumen (12) is provided in the end cap (13), and the lumen (12) extends out of the end cap (13) to form a paste outlet tube (11). An annular groove (15) surrounding the lumen (12) is provided on the side of the end cap (13) facing the protective shell (1). The annular tubular edge of the end of the bellows (4) can be embedded in the annular groove (15) and has an interference fit with the annular groove (15).

3. A press-type ointment extruder according to claim 1, characterized in that: The end of the bellows (4) facing the sleeve (7) is connected to a joint pipe (2), and the joint pipe (2) is also tightly connected to the outer periphery of the extrusion head (6) of the paste tube (3) loaded on the sleeve (7). The joint pipe (2) provides sealing conditions for the docking of the bellows (4) and the extrusion head (6).

4. A press-type ointment extruder according to claim 1, characterized in that: A bottom cover (8) is installed at one end of the sleeve (7) away from the joint pipe (2); the length of the sleeve (7) and the corrugated pipe (4) after being connected through the joint pipe (2) is greater than the distance from the first end to the second end of the protective shell (1).

5. A press-type ointment extruder according to claim 2, characterized in that: The elastic mechanism is a spring (16), which is sleeved on the outer periphery of the bellows (4) or the outer periphery of the joint pipe (2). When the spring (16) is installed on the outer periphery of the bellows (4), two ends of the spring (16) respectively abut against the end cover (13) and the end of the bellows (4) away from the end cover (13), so as to extend the bellows (4); When the spring (16) is installed on the outer periphery of the joint pipe (2), the two ends of the spring (16) respectively abut against the limiting structure on the inner periphery of the protective shell (1) and one end of the sleeve (7) facing the joint pipe (2), so as to extend the bellows (4).

6. A press-type ointment extruder according to claim 5, characterized in that: An annular baffle (17) serving as the limiting structure is provided on the inner periphery of the protective shell (1). The spacing between the annular baffle (17) and the end cover (13) allows the bellows (4) to be accommodated between the annular baffle (17) and the end cover (13) in a non-compressed state. The inner diameter of the annular baffle (17) is smaller than the diameter of the bellows (4), and is used to prevent the bellows (4) from being pulled out of the annular groove (15) by the spring (16).

7. The press-type ointment extruder according to claim 1, characterized in that: The central axis of the cream outlet pipe (11) is arranged obliquely relative to the central axis of the protective shell (1).

8. The press-type ointment extruder according to claim 1, characterized in that: The middle part of the outer periphery of the sleeve (7) is also provided with a circle of annular protrusions (9), and the inner periphery of the protective shell (1) is provided with an annular sliding groove (10). The outer periphery of the sleeve (7) is embedded in the annular sliding groove (10) on the inner periphery of the protective shell (1). The length of the annular sliding groove (10) along the central axis direction of the protective shell (1) is greater than the annular protrusion (9). When the sleeve (7) is pressed, the sleeve (7) slides inside the protective shell (1) along the annular protrusion (9).

9. The press-type ointment extruder according to claim 2, characterized in that: A one-way valve (18) is provided in the tube cavity (12), and the one-way valve (18) includes two valve flaps. The two valve flaps are arranged in an eight-shaped manner at one end of the tube cavity (12) away from the paste outlet pipe (11). The cross-section of the inner periphery of the tube cavity (12) is rectangular. The first ends of the two valve flaps are close to each other and the second end of the relative valve flap is close to the paste outlet pipe (11). The second ends of the two valve flaps are respectively connected to the mutually parallel wall surfaces in the tube cavity (12). The other two mutually parallel wall surfaces in the tube cavity (12) are in contact with and slidably connected to the slender side surfaces between the first end and the second end of the two valve flaps. Under no-pressure conditions, the one-way valve (18) is in a normally closed state. When the bellows (4) is pressed, pressure is generated in the bellows (4), causing the first ends of the two valve flaps to separate. When the bellows (4) is relaxed, negative pressure is generated in the bellows (4), causing the first ends of the two valve flaps to contact each other.

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