Gynecological vaginal applicator

Abstract

This invention discloses a gynecological vaginal medication applicator, relating to the field of biomedical device technology. The invention utilizes a combination of an orifice assembly and a pulling assembly, featuring a steplessly adaptively adjustable orifice assembly. This eliminates the need for traditional split-type delivery head replacement designs, allowing for adjustment of the discharge orifice diameter without disassembling parts, significantly simplifying the medication administration process and avoiding the problems of mixed parts and cumbersome storage. Simultaneously, a transmission assembly achieves a linked adaptive matching between orifice adjustment and pushing resistance. When increasing the discharge orifice diameter for solid medication administration, it reduces pushing resistance, making the pushing process smoother and more uniform in force, effectively preventing tilting or deflection of the applicator due to excessive pushing resistance, ensuring medication accuracy. When decreasing the discharge orifice diameter for fluid medication administration, it simultaneously increases pushing resistance and reduces the sealing gap, effectively preventing leakage at the piston, internal pressure loss, and medication outflow, ensuring accurate dosage and adequate drug concentration at the lesion site.

Description

Technical Field

[0001] This invention relates to the field of biomedical device technology, specifically to a gynecological vaginal delivery device. Background Technology

[0002] Vaginal medication devices are often used to assist in local vaginal administration of drugs for vaginitis and cervicitis. Applicable drugs include various forms such as liquids, gels, ointments, tablets, suppositories, and capsules. In order to facilitate flexible drug delivery for different drugs, different drugs need to be matched with dispensing heads of different orifice sizes. However, existing gynecological vaginal medication devices still have many shortcomings.

[0003] On the one hand, it is very inconvenient to rely on changing multiple discharge conveyor heads to adapt to the use of the medicine: the storage of multiple specifications of accessories is cumbersome and easy to be confused and misused. The conveyor head needs to be disassembled and reassembled every time the medicine is changed, and the operation process is lengthy. On the other hand, existing gynecological vaginal delivery devices have a fixed resistance during dispensing and cannot adaptively adjust to different types of medications. Firstly, when replacing the large-diameter delivery head with one suitable for suppositories, tablets, capsules, and other solid medications, the internal pushing resistance required for pushing the solid medication should be appropriately reduced. However, the sealing pressure of the piston seal ring in the existing gynecological vaginal applicator remains unchanged, and the frictional resistance between the seal ring and the inner wall of the sleeve is too high. When pushing the push rod, the hand exerts a heavy force, resulting in uneven force distribution. This causes the applicator to tilt and deflect during medication delivery, affecting the accurate delivery of medication. Secondly, when replacing the small-diameter delivery head with a liquid or dilute gel-type fluid agent, the fluid has strong fluidity and is prone to internal pressure leakage. The existing gynecological vaginal delivery device's fixed sealing structure cannot simultaneously increase the contact and pressing force between the piston and the cylinder wall, resulting in a widening of the sealing gap. During the delivery process, the liquid will leak backward from the gap between the piston and the sleeve, which not only causes insufficient dosage and the drug concentration at the lesion site to not reach the treatment standard, but also contaminates the user's hands. At the same time, the internal pressure continues to be lost, the discharge flow rate is out of control, and a large amount of liquid flows directly out of the vaginal opening, greatly reducing the drug utilization rate. Therefore, we propose a gynecological vaginal delivery device. Summary of the Invention

[0004] The purpose of this invention is to provide a gynecological vaginal medication device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gynecological vaginal delivery device, comprising a sleeve for storing medication, the sleeve having a front end and a rear end, a piston disc for pushing the delivery of medication slidably connected inside the sleeve, an annular mounting groove being formed on the outer side of the piston disc, and an annular airbag for sealing against the inner wall of the sleeve being installed inside the annular mounting groove, further comprising: A sealing adjustment component is disposed on a piston disc and is used to adjust the sealing state of the annular airbag. The piston disc is provided with a control component for controlling the sealing adjustment component and a pushing component for pushing the control component. Under the action of the pushing component, the control component and the sealing adjustment component, the annular airbag is pressurized and depressurized to adjust the pressure between the annular airbag and the inner wall of the sleeve. A caliber assembly is disposed at the front end of the sleeve for drug delivery, and a pulling assembly for adjusting the caliber is disposed on the outside of the sleeve. In addition, a transmission component for auxiliary transmission is provided between the pulling component and the pushing component. Under the interaction of the transmission component and the pulling component, when the delivery port diameter increases, the pressure between the annular airbag and the inner wall of the sleeve is reduced, thus alleviating the resistance during drug delivery. When the delivery port diameter decreases, the pressure between the annular airbag and the inner wall of the sleeve is increased, thus increasing the resistance during drug delivery.

[0006] Preferably, the sealing adjustment assembly includes a mounting cavity centrally located on the piston disc, and the mounting cavity is connected to the annular airbag via multiple sets of air pipes arranged in a ring array on the piston disc.

[0007] Preferably, the control component includes a mounting cylinder fixed to one side of the piston disc, the mounting cylinder communicating with the interior of the mounting cavity, a piston plate slidably connected inside the mounting cylinder, and a sealing ring for sealing against the interior of the mounting cylinder is embedded on the outer side of the piston plate.

[0008] Preferably, the pushing assembly includes a fixed cylinder that is fixed to the end of the mounting cylinder away from the piston plate. The fixed cylinder is threadedly connected to a connecting plate. The connecting plate is connected and fixed to the piston plate by a connecting rod. A spline push rod is fixed on the connecting plate. The end of the spline push rod away from the connecting plate is located at the rear end of the sleeve and is fixed with a handle.

[0009] Preferably, the sleeve has a friction ring fixed inside for limiting the piston disc to abut against the piston disc after the piston disc is pulled toward the rear end of the sleeve. After the friction ring abuts against the piston disc, the connecting disc rotates, causing relative rotation between the connecting disc and the fixed cylinder.

[0010] Preferably, the caliber assembly includes a rubber ring fixed centrally at the front end of the sleeve, and arc-shaped plates are fixed on the rubber ring in a circular array. Adjacent sets of arc-shaped plates are sealed and retractably connected by a flexible belt, and the rubber ring, each set of arc-shaped plates and the flexible belt are arranged in a conical cylindrical shape.

[0011] Preferably, the pulling assembly includes a cylinder sleeved and fixed to the outside of the sleeve, and multiple sets of pull ropes are slidably connected to the cylinder through sliding holes. One end of each set of pull ropes is fixed to each set of arc plates. A connecting ring is connected between the cylinder and the sleeve through a sliding assembly, and one end of each set of pull ropes is fixed to the connecting ring.

[0012] Preferably, the transmission assembly includes a linkage sleeve fitted on the outside of the sleeve, the inner side of the linkage sleeve being threadedly connected to the outer side of the sleeve, a rotating assembly for assisting rotational connection is provided between one end of the linkage sleeve and the connecting ring, a circular plate is fixed on the inner side of the linkage sleeve, a spline hole is provided on the circular plate, and the spline push rod is slidably connected to the spline hole.

[0013] Preferably, the rotating assembly includes an annular groove formed on the connecting ring, an annular plate rotatably connected to the annular groove, the annular plate being fixed to one end of the linkage sleeve, and the sleeve, cylinder, connecting ring, annular groove, annular plate and linkage sleeve being concentrically arranged.

[0014] Preferably, the sliding assembly includes a fixing ring fixed to the inner side of the cylinder, and multiple sets of T-shaped rods are slidably connected to the fixing ring, with one end of each set of T-shaped rods fixed to the connecting ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention eliminates the traditional structure of drug delivery devices that rely on multiple detachable delivery heads to adapt to different drugs. It adopts an integrated orifice component with stepless adaptive adjustment, eliminating the need for frequent disassembly and replacement of dispensing accessories. This solves the problems of cumbersome storage and easy confusion and misuse of multiple specifications of accessories, effectively shortens the drug replacement and adaptation process, avoids drug contamination and hand contamination caused by accessory disassembly and assembly, greatly improves the convenience of drug delivery, and is suitable for home and clinical rapid drug delivery scenarios. 2. This invention addresses the shortcomings of traditional drug delivery devices, such as fixed sealing resistance, excessive resistance in pushing solid drugs, and uneven force that can easily lead to device tilting and deflection. By utilizing a linkage transmission structure, when the discharge port diameter is increased to accommodate solid drugs such as tablets, suppositories, and capsules, the sealing force of the annular airbag is simultaneously reduced, thereby reducing the frictional resistance of the piston. This ensures uniform force and smooth pushing of the drug, effectively preventing device tilting and drug misalignment, and guaranteeing accurate delivery of the drug to the vaginal lesion. 3. This invention is designed for liquid and dilute gel-type fluid drugs. While adjusting the discharge port diameter, it automatically inflates the annular airbag, increases the clamping force between the piston and the inner wall of the sleeve, and reduces the sealing gap. This effectively solves the problems of excessive gaps, leakage of drug from the rear side of the piston, and depressurization inside the cylinder caused by traditional fixed sealing structures. It also eliminates the drawbacks of drug contamination on hands and drug loss, ensuring a clean and standardized drug administration process. 4. This invention uses a dynamic sealing and pressure stabilizing structure with an airbag to ensure stable pressure inside the cylinder during drug administration, preventing uncontrolled flow rate of fluid drugs and excessive outflow of liquid drugs. This ensures precise and controllable dosage for each administration, guarantees that the drug concentration in the vaginal lesions reaches the treatment standard, avoids poor treatment effect and recurrence of the condition due to insufficient drug dosage, and significantly improves the clinical efficacy of local drug administration for gynecological inflammation. 5. This invention relies on a spline transmission, threaded displacement, and airbag inflation / deflation linkage structure to achieve integrated and synchronous adjustment of orifice diameter and sealing resistance. It eliminates the need for separate manual control of the sealing state, features strong structural linkage, precise and synchronized action, and avoids cumbersome step-by-step operations. It effectively solves the problems of independent adjustment of dual structures in traditional equipment, easy user omissions, and mismatched adjustments, lowers the professional operation threshold, and allows patients at home to accurately and correctly complete drug administration, making it more clinically practical and widely applicable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the cylinder, the linkage sleeve, and the spline push rod of the present invention. Figure 3 This is a schematic diagram of the aperture assembly structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the cylinder of the present invention; Figure 5 This is a schematic diagram of the internal structure of the sleeve of the present invention; Figure 6 This is a schematic diagram showing the positional relationship between the piston disc, control assembly, and push assembly of the present invention; Figure 7 This is a schematic diagram of the sealing adjustment assembly, control assembly, and actuation assembly of the present invention; Figure 8 This is a schematic diagram of the transmission component structure of the present invention; Figure 9 This is a schematic diagram showing the positional relationship between the transmission assembly, friction ring, and spline push rod of the present invention. Figure 10 The diagram shows the structure of the present invention under different usage conditions.

[0017] In the diagram: 101-Sleeve; 102-Piston disc; 103-Annular mounting groove; 104-Annular airbag; 201-Rubber ring; 202-Arc plate; 203-Flexible belt; 301-Cylinder; 302-Pull rope; 303-Connecting ring; 401-Fixing ring; 402-T-shaped rod; 501-Mounting cavity; 502-Air pipe; 601-Mounting cylinder; 602-Piston plate; 603-Sealing ring; 701-Fixing cylinder; 702-Connecting disc; 703-Connecting rod; 704-Splined push rod; 705-Handle; 8-Friction ring; 901-Linkage sleeve; 902-Circular plate; 903-Splined hole; 1001-Annular groove; 1002-Annular plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1

[0020] Please see Figures 1-10 The illustration shows a gynecological vaginal delivery device, which includes a sleeve 101 for storing the drug. The sleeve 101 includes a front end and a rear end. A piston disc 102 for pushing the drug delivery is slidably connected inside the sleeve 101. An annular mounting groove 103 is provided on the outer side of the piston disc 102. An annular airbag 104 for sealing against the inner wall of the sleeve 101 is installed inside the annular mounting groove 103. It should be noted that before using the gynecological vaginal applicator, the medication is filled into the internal cavity of the sleeve 101. After filling, the nozzle component at the front end of the applicator is pushed into the designated position inside the vagina through the vaginal opening. After pushing in, the piston disc 102 is pushed to slide along the inner wall of the sleeve 101 towards the front end of the sleeve 101. The annular mounting groove 103 on the outer side of the piston disc 102 is fitted with an annular airbag 104. The annular airbag 104 is tightly fitted with the inner wall of the sleeve 101 to form a sealed chamber. Therefore, by moving the piston disc 102, the medication inside the sleeve 101 is squeezed forward. The medication is squeezed out through the front end and delivered into the designated position inside the vagina, completing the medication delivery. In addition, the filling of the drug delivery agent, the insertion of the sleeve 101 into the vaginal opening and the control of the insertion position are known technologies in this application, and their working steps and principles will not be described in detail here. Also includes: A sealing adjustment component is disposed on the piston disc 102 for adjusting the sealing state of the annular airbag 104. The piston disc 102 is provided with a control component for controlling the sealing adjustment component and a push component for pushing the control component. Under the action of the push component, the control component and the sealing adjustment component, the annular airbag 104 is pressurized and depressurized to adjust the pressure between the annular airbag 104 and the inner wall of the sleeve 101. A caliber assembly is disposed at the front end of the sleeve 101 for drug delivery, and a pull assembly for adjusting the caliber status is disposed on the outside of the sleeve 101. In addition, a transmission component for auxiliary transmission is provided between the pulling component and the pushing component. Under the interaction between the transmission component and the pulling component, when the delivery port diameter increases, the pressure between the annular airbag 104 and the inner wall of the sleeve 101 is reduced, thus alleviating the resistance during drug delivery. When the delivery port diameter decreases, the pressure between the annular airbag 104 and the inner wall of the sleeve 101 is increased, thus increasing the resistance during drug delivery. It should be noted that the continuously adjustable orifice component, through its coordination with the pulling component, eliminates the need for the traditional split-type conveyor head replacement design. The orifice diameter can be adjusted as needed without disassembling parts, significantly simplifying the drug administration process and avoiding the problems of mixed parts and cumbersome storage. Simultaneously, the transmission component achieves a linkage and adaptive matching between orifice adjustment and pushing resistance. When the orifice diameter is increased to accommodate solid drugs, the pushing resistance is reduced, making the pushing process smoother and the force more even. This effectively avoids tilting or deflection of the drug delivery device caused by excessive pushing resistance, ensuring accurate drug administration. When the orifice diameter is decreased to accommodate fluid drugs, the pushing resistance is increased simultaneously, reducing the sealing gap and effectively preventing drug leakage at the piston, internal pressure loss, and drug outflow, ensuring accurate dosage and adequate drug concentration at the lesion site.

[0021] Preferably, the sealing adjustment assembly includes a mounting cavity 501 centrally located on the piston disc 102, the mounting cavity 501 being connected to the annular airbag 104 via multiple sets of air pipes 502 arranged in a ring array on the piston disc 102; the control assembly includes a mounting cylinder 601 fixed to one side of the piston disc 102, the mounting cylinder 601 communicating with the interior of the mounting cavity 501, a piston plate 602 slidably connected inside the mounting cylinder 601, and a sealing ring 603 for sealing against the interior of the mounting cylinder 601 being embedded on the outer side of the piston plate 602; It should be noted here that: by transmission, the sealed volume inside the mounting cylinder 601 and mounting cavity 501 is changed, and in conjunction with the communication between the air pipe 502 and the annular airbag 104, the pressure inside the annular airbag 104 can be increased or decreased. In addition, during the inflation or deflation process, the annular airbag 104 remains against the inner wall of the sleeve 101 to ensure a sealing effect.

[0022] Preferably, the pushing assembly includes a fixed cylinder 701 that is fixed to the end of the mounting cylinder 601 away from the piston plate 102. The fixed cylinder 701 is threadedly connected to a connecting plate 702. The connecting plate 702 is connected and fixed to the piston plate 602 by a connecting rod 703. A spline push rod 704 is fixed on the connecting plate 702. The end of the spline push rod 704 away from the connecting plate 702 is located at the rear end of the sleeve 101 and is fixed with a handle 705. It should be noted that: when holding the drug delivery device and pushing the handle 705 into the sleeve 101, the handle 705 drives the spline push rod 704 to move forward linearly inside the drug delivery device. The fixed connecting plate 702 at the front end of the spline push rod 704 moves forward accordingly. Since the connecting plate 702 is threadedly connected to the fixed cylinder 701, the axial movement of the connecting plate 702 and the connection between the fixed cylinder 701 and the mounting cylinder 601 push the piston disc 102 to slide along the inner wall of the sleeve 101 towards the front end of the sleeve 101. The annular mounting groove 103 on the outer side of the piston disc 102 is equipped with an annular airbag 104. The annular airbag 104 is tightly fitted with the inner wall of the sleeve 101 to form a sealed chamber. Therefore, by moving the piston disc 102, the drug inside the sleeve 101 is squeezed forward. The drug is squeezed out through the front end of the orifice assembly composed of a rubber ring 201, an arc plate 202, and a flexible band 203 and delivered into the designated position inside the vagina to complete the drug delivery. Furthermore, during subsequent transmission, when the diameter is adjusted by rotating the spline push rod 704, the connecting plate 702 rotates synchronously. Because the piston plate 102 is abutted and limited by the friction ring 8, the piston plate 102, the mounting cylinder 601, and the fixed cylinder 701 cannot rotate, causing the connecting plate 702 to rotate relative to the inside of the fixed cylinder 701. During the relative rotation, the rotational motion of the connecting plate 702 is converted into a linear displacement along the axis of the inner side of the fixed cylinder 701 through the threaded engagement between the connecting plate 702 and the inner wall of the fixed cylinder 701. During the movement, the connecting plate 702 drives the piston plate 602 to slide synchronously back and forth inside the mounting cylinder 601 through the connecting rod 703. The movement of the piston plate 602, combined with the sealing effect of the sealing ring 603, changes the sealed volume inside the mounting cylinder 601 and the mounting cavity 501.

[0023] Preferably, a friction ring 8 is fixed inside the sleeve 101 for limiting the piston disc 102 to abut against the piston disc 102 after being pulled toward the rear end of the sleeve 101. After the friction ring 8 abuts against the piston disc 102, the connecting disc 702 rotates relative to the fixed cylinder 701 as the connecting disc 702 rotates. It should be noted here that when different drugs need to be administered, the usage status of the nozzle assembly is adjusted according to the type of drug. During the adjustment process, the handle 705 is pulled away from the sleeve 101. During the pulling process, the spline push rod 704, connecting plate 702, fixing cylinder 701, mounting cylinder 601 and piston plate 102 move towards the rear end of the sleeve 101 inside the sleeve 101 until one end face of the piston plate 102 is completely pressed against the friction ring 8 fixed inside the sleeve 101. The friction ring 8 and the piston plate 102 are in contact and limited, which restricts the piston plate 102 from circumferentially rotating during subsequent adjustment.

[0024] Preferably, the caliber assembly includes a rubber ring 201 fixed at the front end of the sleeve 101, and arc-shaped plates 202 are fixed on the rubber ring 201 in a ring array. Two adjacent sets of arc-shaped plates 202 are sealed and telescopically connected by a flexible strip 203, and the rubber ring 201, each set of arc-shaped plates 202 and the flexible strip 203 are arranged in a conical cylindrical shape. It should be noted here that: through transmission, each group of arc plates 202 is pulled outward to expand the discharge port diameter. Conversely, when the pulling effect of each group of pull ropes 302 on the arc plates 202 is relieved, each group of arc plates 202 is reset and retracted under the flexibility and elasticity of the flexible belt 203, and the discharge port diameter is reduced, thereby completing the stepless adjustment of the conveying port diameter. Additionally, it is worth noting that the flexible strip 203 is flexible and elastic. As a conventional elastic and flexible component, the material composition, flexibility, and elasticity principle of the flexible strip 203 are well-known technologies and will not be elaborated upon here.

[0025] Preferably, the pulling component includes a cylinder 301 sleeved and fixed to the outside of the sleeve 101. Multiple sets of pull ropes 302 are slidably connected to the cylinder 301 through sliding holes. One end of each set of pull ropes 302 is fixed to each set of arc plates 202. A connecting ring 303 is connected between the cylinder 301 and the sleeve 101 through a sliding component. One end of each set of pull ropes 302 is fixed to the connecting ring 303. It should be noted here that: the transmission component drives the connecting ring 303 to move horizontally. Multiple sets of pull ropes 302 are fixed on the connecting ring 303. The pull ropes 302 pass through the sliding holes of the cylinder 301 and are connected to each set of arc plates 202 respectively. Therefore, when the connecting ring 303 moves horizontally towards the rear end of the sleeve 101, in conjunction with the pulling action of the pull ropes 302, each set of arc plates 202 is pulled outward to expand the discharge port diameter.

[0026] Preferably, the transmission assembly includes a linkage sleeve 901 sleeved on the outside of the sleeve 101. The inner side of the linkage sleeve 901 is threadedly connected to the outer side of the sleeve 101. A rotating assembly for auxiliary rotational connection is provided between one end of the linkage sleeve 901 and the connecting ring 303. A circular plate 902 is fixed on the inner side of the linkage sleeve 901. A spline hole 903 is provided on the circular plate 902. A spline push rod 704 is slidably connected to the spline hole 903. It should be noted here that: rotating the handle 705 causes the spline push rod 704 to rotate synchronously in the circumferential direction. The spline push rod 704 passes through the spline hole 903 of the inner circular plate 902 of the linkage sleeve 901. The spline structure realizes circumferential torque transmission and axial sliding. When the spline push rod 704 rotates, it drives the circular plate 902 and the linkage sleeve 901 to rotate synchronously.

[0027] Preferably, the rotating assembly includes an annular groove 1001 formed on the connecting ring 303, an annular plate 1002 rotatably connected to the annular groove 1001, the annular plate 1002 being fixed to one end of the linkage sleeve 901, and the sleeve 101, cylinder 301, connecting ring 303, annular groove 1001, annular plate 1002 and linkage sleeve 901 being concentrically arranged; It should be noted here that: through the annular groove 1001 and the annular plate 1002, the auxiliary connecting ring 303 and the linkage sleeve 901 are rotatably connected. When the linkage sleeve 901 rotates, the connecting ring 303 does not rotate. When the linkage sleeve 901 moves axially, it drives the connecting ring 303 to move axially synchronously.

[0028] Preferably, the sliding assembly includes a fixing ring 401 fixed to the inner side of the cylinder 301, and a plurality of T-shaped rods 402 are slidably connected to the fixing ring 401, with one end of each set of T-shaped rods 402 fixed to the connecting ring 303; It should be noted here that the connecting ring 303 under stress is slidably guided by the fixing ring 401 and multiple sets of T-shaped rods 402.

[0029] This solution describes a gynecological vaginal medication applicator, which includes the following steps: Before using the gynecological vaginal applicator, the medication is filled into the internal cavity of the sleeve 101. After filling, the nozzle component at the front end of the applicator is pushed into the designated position inside the vagina through the vaginal opening. After insertion, the applicator is held and the handle 705 is pushed into the sleeve 101. During the pushing process, the handle 705 drives the splined push rod 704 to move forward linearly inside the applicator. The fixed connecting plate 702 at the front end of the splined push rod 704 moves forward accordingly. Since the connecting plate 702 is threadedly connected to the fixed sleeve 701, the axial movement of the connecting plate 702... The piston disc 102, along with the connecting function of the fixing cylinder 701 and the mounting cylinder 601, pushes the piston disc 102 to slide along the inner wall of the sleeve 101 towards the front end of the sleeve 101. The annular mounting groove 103 on the outer side of the piston disc 102 is equipped with an annular airbag 104. The annular airbag 104 is tightly fitted with the inner wall of the sleeve 101 to form a sealed chamber. Therefore, by moving the piston disc 102, the medicine inside the sleeve 101 is squeezed forward. The medicine is squeezed out through the front end of the orifice assembly composed of a rubber ring 201, an arc plate 202, and a flexible belt 203, and delivered into the designated position inside the vagina to complete the drug delivery. During the entire drug delivery process, when different drugs need to be delivered, the usage status of the nozzle assembly is adjusted according to the type of drug. During the adjustment, the handle 705 is pulled away from the sleeve 101. During the pulling process, the spline push rod 704, connecting plate 702, fixing cylinder 701, mounting cylinder 601, and piston plate 102 move towards the rear end of the sleeve 101 inside the sleeve 101 until one end face of the piston plate 102 is completely pressed against the friction ring 8 fixed inside the sleeve 101. The friction ring 8 and the piston plate 102 are in contact and limited, restricting the piston plate 102 from circumferential rotation during subsequent adjustments. After pulling, the handle 705 is rotated, and the handle 705 drives the spline push rod 704 to rotate synchronously. The spline push rod 704 passes through the spline hole of the circular plate 902 inside the linkage sleeve 901. Within 903, the spline structure enables circumferential torque transmission and axial sliding. When the spline push rod 704 rotates, it drives the circular plate 902 and the linkage sleeve 901 to rotate synchronously. The inner wall of the linkage sleeve 901 and the outer wall of the sleeve 101 are provided with mating threads. The thread engagement converts the rotational motion of the linkage sleeve 901 into axial linear displacement along the sleeve 101. An annular plate 1002 is fixed at the front end of the linkage sleeve 901. The annular plate 1002 is embedded in the annular groove 1001 of the connecting ring 303 to form a rotating assembly. Therefore, when the linkage sleeve 901 moves axially, it can drive the connecting ring 303 to move synchronously. Multiple sets of pull ropes 302 are fixed on the connecting ring 303. The pull ropes 302 pass through the sliding holes of the cylinder 301 and are connected to each set of arc plates 202 respectively. Therefore, when the connecting ring 303 moves towards the rear end of the sleeve 101, the pulling action of the pull ropes 302 pulls each set of arc plates 202. The outward expansion increases the discharge diameter. Conversely, when the connecting ring 303 moves towards the front end of the sleeve 101, it alleviates the pulling effect of each group of pull ropes 302 on the arc plate 202. Under the flexibility and elasticity of the flexible belt 203, each group of arc plates 202 resets and retracts, and the discharge diameter shrinks, thereby completing the stepless adjustment of the conveying diameter. When the diameter is adjusted by rotating the spline push rod 704, the connecting plate 702 rotates synchronously. Because the piston plate 102 is stopped by the friction ring 8, the piston plate 102, mounting cylinder 601, and fixed cylinder 701 cannot rotate, causing the connecting plate 702 to rotate relative to the fixed cylinder 701. During this relative rotation, the threaded engagement between the connecting plate 702 and the inner wall of the fixed cylinder 701 converts the rotational motion of the connecting plate 702 into a linear displacement along the axis inside the fixed cylinder 701. During this movement, the connecting plate 702 drives the piston plate 6 via the connecting rod 703. 02. The piston plate 602 moves synchronously back and forth inside the mounting cylinder 601. The movement of the piston plate 602, combined with the sealing effect of the sealing ring 603, changes the sealed volume inside the mounting cylinder 601 and mounting cavity 501. This, along with the connection between the air pipe 502 and the annular airbag 104, allows for pressurization or depressurization inside the annular airbag 104. Therefore, during the entire diameter adjustment process, when the rotating handle 705 increases the front-end conveying diameter, the piston plate 602 is pulled towards the rear end of the sleeve 101 via transmission. This expands the internal volume of the mounting cylinder 601 and mounting cavity 501, reduces the internal air pressure, and causes the annular airbag 104 to... Part of the internal gas flows back to the mounting cavity 501 through the air tube 502. The annular airbag 104 undergoes slight decompression and contraction. At this time, the pressure between the annular airbag 104 and the inner wall of the sleeve 101 decreases synchronously. When the piston disc 102 pushes the drug forward, the frictional resistance decreases. This is suitable for solid drugs such as suppositories, tablets, and capsules, making it easier to push the drug out more smoothly and ensuring the correct delivery position. When the handle 705 is rotated to reduce the diameter of the front delivery port, the piston plate 602 is pushed to slide towards the front of the sleeve 101 through transmission. The internal volume of the mounting cylinder 601 and the mounting cavity 501 decreases, and the air pressure inside the cavity increases. High-pressure gas is filled into the annular airbag 104 through multiple sets of air tubes 502. The annular airbag 104 inflates and expands. At this time, the pressure between the annular airbag 104 and the inner wall of the sleeve 101 increases, reducing the sealing gap between the piston disc 102 and the sleeve 101 wall. This prevents liquid and dilute gel-like fluid drugs from leaking and depressurizing from the rear side of the piston, ensuring accurate drug dosage.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gynecological vaginal medication applicator, comprising: A sleeve (101) for storing drugs is provided. The sleeve (101) includes a front end and a rear end. A piston disc (102) for pushing the drug delivery is slidably connected inside the sleeve (101). An annular mounting groove (103) is provided on the outer side of the piston disc (102). An annular air bladder (104) for sealing against the inner wall of the sleeve (101) is installed inside the annular mounting groove (103). Its characteristic is that it further includes: A sealing adjustment assembly is disposed on a piston disc (102) for adjusting the sealing state of the annular airbag (104). The piston disc (102) is provided with a control assembly for controlling the sealing adjustment assembly and a push assembly for pushing the control assembly. Under the action of the push assembly, the control assembly and the sealing adjustment assembly, the annular airbag (104) is pressurized and depressurized to adjust the pressure between the annular airbag (104) and the inner wall of the sleeve (101). A caliber assembly is disposed at the front end of the sleeve (101) for drug delivery, and a pull assembly for adjusting the caliber state is disposed on the outside of the sleeve (101). In addition, a transmission component for auxiliary transmission is provided between the pulling component and the pushing component. Under the interaction between the transmission component and the pulling component, when the delivery port diameter increases, the pressure between the annular airbag (104) and the inner wall of the sleeve (101) is reduced, thus alleviating the resistance during drug delivery. When the delivery port diameter decreases, the pressure between the annular airbag (104) and the inner wall of the sleeve (101) is increased, thus increasing the resistance during drug delivery.

2. A gynaecological vaginal applicator according to claim 1, characterised in that: The sealing adjustment assembly includes a mounting cavity (501) centrally located on the piston disc (102). The mounting cavity (501) is connected to the annular airbag (104) via multiple sets of air pipes (502). The multiple sets of air pipes (502) are arranged in an annular array on the piston disc (102).

3. A gynaecological vaginal applicator according to claim 2, characterised in that: The control assembly includes a mounting cylinder (601) fixed to one side of the piston disc (102). The mounting cylinder (601) communicates with the interior of the mounting cavity (501). A piston plate (602) is slidably connected inside the mounting cylinder (601). A sealing ring (603) for sealing against the interior of the mounting cylinder (601) is embedded on the outer side of the piston plate (602).

4. A gynaecological vaginal applicator according to claim 3, characterised in that: The pushing assembly includes a fixed cylinder (701) that is fixed to the end of the mounting cylinder (601) away from the piston plate (102). The fixed cylinder (701) is threadedly connected to a connecting plate (702) by means of threads. The connecting plate (702) is connected and fixed to the piston plate (602) by a connecting rod (703). A spline push rod (704) is fixed on the connecting plate (702). The end of the spline push rod (704) away from the connecting plate (702) is located at the rear end of the sleeve (101) and is fixed with a handle (705).

5. A gynecological vaginal medication applicator according to claim 4, characterized in that: The sleeve (101) is fixed with a friction ring (8) for the piston disc (102) to be pulled toward the rear end of the sleeve (101) and to be stopped against the piston disc (102). After the friction ring (8) is against the piston disc (102), the connecting disc (702) rotates relative to the fixed cylinder (701) as the connecting disc (702) rotates.

6. A gynecological vaginal medication applicator according to claim 4, characterized in that: The caliber assembly includes a rubber ring (201) fixed in the center at the front end of the sleeve (101). Arc plates (202) are fixed on the rubber ring (201) in a ring array. Two adjacent sets of arc plates (202) are sealed and retractably connected by a flexible strip (203). The rubber ring (201), each set of arc plates (202) and the flexible strip (203) are arranged in a conical cylindrical shape.

7. A gynecological vaginal medication applicator according to claim 6, characterized in that: The pulling assembly includes a cylinder (301) sleeved and fixed to the outside of the sleeve (101). Multiple sets of pull ropes (302) are slidably connected to the cylinder (301) through sliding holes. One end of each set of pull ropes (302) is fixed to each set of arc plates (202). A connecting ring (303) is connected between the cylinder (301) and the sleeve (101) through a sliding assembly. One end of each set of pull ropes (302) is fixed to the connecting ring (303).

8. A gynecological vaginal medication applicator according to claim 7, characterized in that: The transmission assembly includes a linkage sleeve (901) sleeved on the outside of the sleeve (101). The inner side of the linkage sleeve (901) is threadedly connected to the outer side of the sleeve (101). A rotating assembly for auxiliary rotational connection is provided between one end of the linkage sleeve (901) and the connecting ring (303). A circular plate (902) is fixed on the inner side of the linkage sleeve (901). A spline hole (903) is provided on the circular plate (902). The spline push rod (704) is slidably connected to the spline hole (903).

9. A gynecological vaginal medication applicator according to claim 8, characterized in that: The rotating assembly includes an annular groove (1001) formed on the connecting ring (303), an annular plate (1002) is rotatably connected to the annular groove (1001), the annular plate (1002) is fixed to one end of the linkage sleeve (901), and the sleeve (101), cylinder (301), connecting ring (303), annular groove (1001), annular plate (1002) and linkage sleeve (901) are concentrically arranged.

10. A gynecological vaginal medication applicator according to claim 7, characterized in that: The sliding assembly includes a fixing ring (401) fixed to the inner side of the cylinder (301), and multiple sets of T-shaped rods (402) are slidably connected on the fixing ring (401), with one end of each set of T-shaped rods (402) fixed to the connecting ring (303).

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