Vaginal drug delivery device

Abstract

The present invention relates to the field of medical devices and discloses a vaginal drug delivery device comprising: a main body, a deformable liquid-conducting tube body, and a contraction and expansion device. The deformable liquid-conducting structure includes a plurality of deformable liquid-conducting tubes arranged along the circumference of the main body. The main body is provided with a plurality of first liquid outlet structures along the circumference of the main body. The deformable liquid-conducting tubes correspond to and are connected to the first liquid outlet structures. The contraction and expansion device is used to move the ends of all the deformable liquid-conducting tubes away from the first liquid outlet structures in a direction away from the main body axis, or to move the ends of all the deformable liquid-conducting tubes away from the first liquid outlet structures in a direction toward the main body axis. After the vaginal drug delivery device reaches the lesion site, the contraction and expansion device can expand or contract the deformable liquid-conducting tubes. By expanding or contracting the deformable liquid-conducting tubes, the size of the vaginal drug delivery device can be adjusted.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to a vaginal drug delivery device. Background Art

[0002] At present, common gynecological diseases mainly include vaginitis, cervicitis, cervical erosion and endometritis. These gynecological diseases have a high incidence rate, are easily infected, and are prone to recurrence, which brings great pain to patients. With the development of medical technology, gynecological internal anti-inflammatory drug delivery products have gradually become popular in the market, and thus the current medical method of intravaginal drug delivery has emerged. Intravaginal drug delivery is a drug delivery route in which the drug is directly applied into the vagina. In pharmacology, this method has potential advantages in delivering drugs to the vagina or nearby structures. However, existing gynecological vaginal drug delivery devices cannot achieve the goal of pushing the drug delivery device into the vagina and applying it to the inner wall of the vagina according to the size of the vaginal cavity to deliver the drug. By making the vaginal drug delivery device apply it to the inner wall of the vagina to deliver the drug, the drug delivery effect can be effectively improved.

[0003] Therefore, how to provide a size-adjustable vaginal drug delivery device has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a vaginal drug delivery device with adjustable size.

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

[0006] The present invention provides a vaginal drug delivery device, comprising:

[0007] A main body, wherein a liquid storage cavity is provided inside the main body, and a liquid inlet structure and a plurality of first liquid outlet structures are provided on the main body, wherein the liquid inlet structure is used to feed liquid into the liquid storage cavity, and the first liquid outlet structures are used to discharge the liquid inside the liquid storage cavity, and all the first liquid outlet structures are arranged along the circumference of the main body;

[0008] a deformable liquid-conducting structure comprising a plurality of deformable liquid-conducting tubes arranged along the circumference of the main body, the deformable liquid-conducting tubes corresponding one-to-one with and communicating with the first liquid-discharging structure, the ends of each deformable liquid-conducting tube remote from the first liquid-discharging structure being sealed, and each deformable liquid-conducting tube being provided with a plurality of second liquid-discharging structures along its length, the second liquid-discharging structures being used to discharge liquid from the interior of the deformable liquid-conducting tube;

[0009] a contraction and expansion device, the contraction and expansion device being used to move the ends of all the deformable liquid conduits away from the first liquid outlet structure in a direction away from the axis of the main body, or to move the ends of all the deformable liquid conduits away from the first liquid outlet structure in a direction toward the axis of the main body;

[0010] A flexible inner shell, made of a flexible water-absorbing material, and wrapped around the entire first liquid outlet structure and the deformable liquid guide structure;

[0011] An elastic booster sleeve, which is sleeved on the outside of the flexible inner shell;

[0012] The boosting and locking positioning cylinder is sleeved on the main body and detachably connected to the main body, and one end of the boosting and locking positioning cylinder close to the first liquid outlet structure is embedded in one end of the flexible inner shell close to the first liquid outlet structure.

[0013] Optionally, the expansion and contraction device includes: a pull rod, a piston and a plurality of connecting rods, a guide cavity is provided inside the main body, the piston can be slidably provided in the guide cavity, and the outer wall of the piston is in contact with the inner wall of the guide cavity, each of the deformable liquid guide tubes is provided with a connecting ear, the connecting ear corresponds to and is connected to the deformable liquid guide tube one by one, the main body is circumferentially provided with a plurality of grooves connected to the guide cavity, the connecting ear extends into the guide cavity through the groove body, the connecting ear is slidably connected to the groove body, and a useful A limiting structure is provided for limiting the movement of the connecting ear in a direction away from the first liquid outlet structure, the connecting rod corresponds to the connecting ear one by one, one end of each connecting rod is hingedly connected to the piston, and the other end of each connecting rod is hingedly connected to the corresponding connecting ear, the groove body is used to avoid the connecting rod and the connecting ear, one end of the pull rod extends into the guide cavity and is connected to the piston; it also includes a limiting device, the limiting device is arranged on the main body, and the limiting device can make the pull rod hover at multiple positions along the axial direction of the main body.

[0014] Optionally, the liquid storage chamber and the guide chamber are arranged in sequence along the axial direction of the main body, and the axes of the liquid storage chamber and the guide chamber coincide with the axis of the main body. The booster locking positioning cylinder is sleeved on one end of the main body where the liquid storage chamber is provided. An isolation chamber is provided inside the liquid storage chamber, and the liquid storage chamber and the isolation chamber are separated by an isolation sleeve. The axis of the isolation chamber coincides with the axis of the main body, and one end of the pull rod passes through the booster locking positioning cylinder and the isolation chamber in sequence and extends into the interior of the guide chamber.

[0015] Optionally, the axis of the pull rod coincides with the axis of the piston, the pull rod is rotationally connected to the piston, and the limiting device includes two first limiting assemblies and two second limiting assemblies, the two first limiting assemblies are both arranged on the outer side wall of the pull rod, and the two first limiting assemblies are arranged at intervals along the circumference of the pull rod, the two second limiting assemblies are both arranged on the inner side wall of the isolation sleeve, and the two second limiting assemblies are arranged at intervals along the circumference of the isolation sleeve, the first limiting assembly includes a plurality of first limiting teeth, the second limiting assembly includes a plurality of second limiting teeth, all of the first limiting teeth are sequentially arranged on the outer side wall of the pull rod along the axial direction of the pull rod, and all of the second limiting teeth are sequentially arranged on the inner side wall of the isolation sleeve along the axial direction of the isolation sleeve;

[0016] In the first state, the two first limiting assemblies correspond to the two second limiting assemblies respectively, and the first limiting teeth can be supported on the second limiting teeth;

[0017] When in the second state, the position of the first limiting component is staggered with the position of the second limiting component.

[0018] Optionally, the pull rod passes through the piston, and a limiting ring is provided at the bottom end of the pull rod for limiting the separation of the pull rod from the piston.

[0019] Optionally, the number of the first limiting components and the second limiting components are both two, the two first limiting components are arranged on both sides of the pull rod, and the two second limiting components are arranged on both sides of the inner wall of the isolation sleeve, and the first limiting components and the second limiting components correspond one to one.

[0020] Optionally, the end of each of the deformable liquid guiding tubes away from the first liquid outlet structure is provided with a drainage structure connected to the interior of the deformable liquid guiding tube, and the ends of all of the deformable liquid guiding tubes away from the first liquid outlet structure can fit together, and when the ends of all of the deformable liquid guiding tubes away from the first liquid outlet structure fit together, each of the drainage structures is blocked.

[0021] Optionally, a plurality of positioning grooves are provided on the circumference of the flexible inner shell, and a plurality of positioning pieces are provided on the circumference of the inner side wall of the elastic booster sleeve. The positioning pieces correspond to the positioning grooves one by one, and each positioning piece is arranged in its corresponding positioning groove.

[0022] Optionally, a plurality of cracks are circumferentially provided at one end of the elastic booster sleeve away from the first liquid outlet structure.

[0023] Compared with the prior art, the present invention has achieved the following technical effects:

[0024] The vaginal applicator provided by the present invention includes: a main body, a liquid storage cavity is provided inside the main body, a liquid inlet structure and a plurality of first liquid outlet structures connected to the liquid storage cavity are provided on the main body, the liquid inlet structure is used to feed liquid into the liquid storage cavity, the first liquid outlet structure is used to discharge the liquid inside the liquid storage cavity, and all the first liquid outlet structures are arranged along the circumference of the main body; a deformable liquid guide structure, the deformable liquid guide structure includes a plurality of deformable liquid guide tubes arranged along the circumference of the main body, the deformable liquid guide tubes correspond to the first liquid outlet structures one by one and are connected, and one end of each deformable liquid guide tube away from the first liquid outlet structure is closed, and each deformable liquid guide tube is provided with a plurality of second liquid outlet structures along its own length direction, and the second liquid outlet structure is used to discharge the deformable liquid guide tube The liquid inside the tube is discharged; the expansion and contraction device is used to make the ends of all deformable liquid-conducting tubes away from the first liquid outlet structure move in the direction away from the axis of the main body, or to make the ends of all deformable liquid-conducting tubes away from the first liquid outlet structure move in the direction close to the axis of the main body; the flexible inner shell is made of a flexible water-absorbing material, and the flexible inner shell is wrapped around the outside of all the first liquid outlet structures and the deformable liquid-conducting structures; the elastic booster sleeve is sleeved on the outside of the flexible inner shell; the booster locking positioning cylinder is sleeved on the main body and is detachably connected to the main body, and the end of the booster locking positioning cylinder close to the first liquid outlet structure is embedded in the end of the flexible inner shell close to the first liquid outlet structure.

[0025] During specific use, after the vaginal applicator is placed as a whole at a predetermined position inside the user's vagina (depending on the actual situation), the elastic booster sleeve is withdrawn, the elastic booster sleeve is taken out from the user's vagina, and then removed from the vaginal applicator. Afterwards, according to actual needs, the expansion and contraction device is used to move the ends of all the deformable liquid-conducting tubes away from the first liquid outlet structure in a direction away from the main body axis, so that the deformable liquid-conducting structure expands, or the ends of all the deformable liquid-conducting tubes away from the first liquid outlet structure are moved in a direction close to the main body axis, so that the deformable liquid-conducting structure contracts. As the deformable liquid-conducting structure contracts or expands, the overall shape of the vaginal applicator contracts or expands accordingly, thereby enabling the size of the vaginal applicator to match the size of the vaginal cavity, so that the vaginal applicator can adhere to the inner wall of the vagina to administer medicine.

[0026] Compared with the existing vaginal drug delivery device, the vaginal drug delivery device provided by the present invention can be attached to the inner wall of the vagina according to the size of the vaginal cavity to deliver the drug, and the drug delivery effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic structural diagram of a vaginal drug delivery device provided in an embodiment of the present invention;

[0029] Figure 2 A cross-sectional view of a vaginal drug delivery device provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic structural diagram of the main body of the vaginal drug delivery device provided in an embodiment of the present invention;

[0031] Figure 4 A cross-sectional view of a vaginal drug delivery device body provided in an embodiment of the present invention;

[0032] Figure 5 for Figure 4 An enlarged view of part I;

[0033] Figure 6 A schematic diagram showing a deformable catheter of a vaginal drug delivery device provided in an embodiment of the present invention from a first angle;

[0034] Figure 7 A second angle schematic diagram of the deformable catheter of the vaginal drug delivery device provided in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the arrangement of the vaginal drug delivery device and the expansion device provided in an embodiment of the present invention;

[0036] Figure 9 Schematic diagram of the arrangement of the positioning piece of the vaginal drug delivery device provided in an embodiment of the present invention;

[0037] Figure 10 Schematic diagram of the structure of the elastic booster sleeve of the vaginal drug delivery device provided in an embodiment of the present invention

[0038] Figure 11 Schematic diagram of the cooperation between the first limiting tooth and the second limiting tooth of the vaginal drug delivery device provided in an embodiment of the present invention.

[0039] Figures 1-11Explanation of the accompanying reference numerals: 100, vaginal applicator; 1, main body; 101, liquid storage chamber; 102, guide chamber; 103, limiting boss; 104, first liquid outlet structure; 105, first slot; 106, second slot; 107, limiting structure; 2, deformable liquid guide tube; 201, second liquid outlet structure; 202, drainage structure; 3, flexible inner shell; 4, elastic booster sleeve; 401, slit; 5, booster locking positioning cylinder; 6, pull rod; 7, piston; 8, connecting rod; 9, connecting ear; 10, isolation chamber; 11, isolation sleeve; 12, guide plate; 13, positioning plate; 14, pull ring; 15, limiting ring; 16, limiting block; 17, second limiting tooth; 1701, second inclined surface; 18, first limiting tooth. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] The object of the present invention is to provide a vaginal drug delivery device with adjustable size.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] refer to Figures 1-10 As shown, the vaginal drug delivery device 100 provided in this embodiment includes: a main body 1, a deformable liquid guiding structure, a contraction and expansion device, a flexible inner shell 3, an elastic boosting sleeve 4 and a boosting and locking positioning cylinder 5.

[0044] A liquid storage chamber 101 is provided within the main body 1. The main body 1 is provided with a liquid inlet structure communicating with the liquid storage chamber 101 and a plurality of first liquid outlet structures 104. The liquid inlet structure is used to supply liquid (medicinal liquid) into the liquid storage chamber 101. In this embodiment, the liquid inlet structure is specifically a liquid inlet hole, and the liquid inlet hole is provided at the top of the main body 1. The first liquid outlet structures 104 are used to discharge the liquid within the liquid storage chamber 101. All first liquid outlet structures 104 are provided along the circumference of the main body 1. In this embodiment, the first liquid outlet structures 104 are specifically liquid outlet channels.

[0045] The deformable liquid-conducting structure includes multiple deformable liquid-conducting tubes 2 arranged along the circumference of the main body 1. Each deformable liquid-conducting tube 2 corresponds to and is connected to the first liquid-outlet structure 104. Each deformable liquid-conducting tube 2 is sealed at one end away from the first liquid-outlet structure 104. Each deformable liquid-conducting tube 2 is provided with multiple second liquid-outlet structures 201 along its length, which are used to discharge liquid from the deformable liquid-conducting tube 2. In this embodiment, the second liquid-outlet structures 201 are specifically liquid outlet holes. The deformable liquid-conducting tubes are made of a deformable material, such as plastic.

[0046] The contraction and expansion device is used to move the ends of all deformable liquid-conducting tubes 2 away from the first liquid outlet structure 104 in a direction away from the axis of the main body 1, so that the deformable liquid-conducting structure as a whole expands outward, or to move the ends of all deformable liquid-conducting tubes 2 away from the first liquid outlet structure 104 in a direction close to the axis of the main body 1, so that the deformable liquid-conducting structure as a whole contracts.

[0047] The flexible inner shell 3 is made of a flexible, water-absorbing material and wraps around the entire first liquid outlet structure 104 and the deformable liquid-conducting structure. The flexible inner shell 3 has a water-absorbing function and can absorb the liquid medicine. This allows for a proper application when the flexible inner shell 3 conforms to the inner wall of the vagina. Furthermore, when the deformable liquid-conducting structure is fully contracted, the flexible inner shell 3 partially overlaps. As the deformable liquid-conducting structure expands, the flexible inner shell 3 gradually expands, and when the deformable liquid-conducting structure is fully expanded, the flexible inner shell 3 is completely expanded.

[0048] The elastic booster sleeve 4 is mounted externally of the flexible inner shell 3. The booster locking positioning cylinder 5 is mounted on the main body 1 and is removably connected to the main body 1. The end of the booster locking positioning cylinder 5 near the first liquid outlet structure 104 is embedded in the end of the flexible inner shell 3 near the first liquid outlet structure 104. In this embodiment, the booster locking positioning cylinder 5 is specifically connected to the main body 1 via a threaded connection. This arrangement integrates the booster locking positioning cylinder 5, the main body 1, and the inner shell. The booster locking positioning cylinder 5 serves to position the elastic booster sleeve 4 when it is withdrawn.

[0049] During specific use, after the vaginal drug delivery device 100 is placed as a whole at a predetermined position inside the user's vagina (depending on the actual situation), the elastic booster sleeve 4 is withdrawn, the elastic booster sleeve 4 is removed from the user's vagina, and then removed from the vaginal drug delivery device 100. Afterwards, according to actual needs, the expansion and contraction device is used to move the ends of all the deformable liquid-conducting tubes 2 away from the first liquid outlet structure 104 in a direction away from the axis of the main body 1, causing the deformable liquid-conducting structure to expand, or to move the ends of all the deformable liquid-conducting tubes 2 away from the first liquid outlet structure 104 in a direction close to the axis of the main body 1, causing the deformable liquid-conducting structure to contract. As the deformable liquid-conducting structure contracts or expands, the overall shape of the vaginal drug delivery device contracts or expands accordingly, thereby enabling the size of the vaginal drug delivery device to match the size of the vaginal cavity, allowing the vaginal drug delivery device to adhere to the inner wall of the vagina to deliver drugs.

[0050] Compared with the existing vaginal drug delivery device, the vaginal drug delivery device provided by the present invention can be attached to the inner wall of the vagina according to the size of the vaginal cavity to deliver the drug, and the drug delivery effect is better.

[0051] In addition, during specific use, the drug liquid enters the liquid storage chamber 101 from the liquid inlet structure, then enters the deformable liquid catheter 2 through the first liquid outlet structure 104 connected to the liquid storage chamber 101, and finally reaches the flexible inner shell 3 through the deformable liquid catheter 2. When the size of the vaginal drug delivery device matches the size of the vaginal cavity, the outer wall of the flexible inner shell 3 fits with the inner wall of the vagina, and the drug is delivered by adhering to the inner wall of the vagina.

[0052] It should be noted that the user can judge whether the flexible inner shell 3 of the vaginal applicator 100 fits the inner wall of the vagina based on their own feeling.

[0053] In this embodiment, if Figure 2 and Figure 8As shown, the expansion and contraction device includes: a pull rod 6, a piston 7 and a plurality of connecting rods 8. A guide cavity 102 is provided inside the main body 1. The piston 7 can be slidably arranged in the guide cavity 102, and the outer wall of the piston 7 fits with the inner wall of the guide cavity 102. Each deformable liquid guide tube 2 is provided with a connecting ear 9, and the connecting ear 9 corresponds to and is connected to the deformable liquid guide tube 2 one by one. The main body 1 is circumferentially provided with a plurality of grooves connected to the guide cavity 102. The connecting ear 9 extends into the interior of the guide cavity 102 through the groove body. The connecting ear 9 is slidably connected to the groove body, and the groove body is provided with a plurality of grooves connected to the guide cavity 102. A limiting structure 107 is provided for limiting the movement of the connecting ear 9 in a direction away from the first liquid outlet structure 104. The connecting rods 8 correspond to the connecting ears 9 one by one. One end of each connecting rod 8 is hingedly connected to the piston 7, and the other end of each connecting rod 8 is hingedly connected to its corresponding connecting ear 9. The groove body is used to avoid the connecting rods 8 and the connecting ears 9. One end of the pull rod 6 extends into the guide cavity 102 and is connected to the piston 7. It also includes a limiting device, which is provided on the main body 1. The limiting device can make the pull rod 6 hover at multiple positions along the axial direction of the main body 1. In this embodiment, the limiting structure 107 is a limiting step. The groove body includes a first slot 105 and a second slot 106. The first slot 105 is used to avoid the connecting rod 8 and provide space for the movement of the connecting rod 8. The second slot 106 is used to avoid the connecting ear 9 and provide space for the movement of the connecting ear 9.

[0054] During specific use, when the pull rod 6 drives the piston 7 to move toward the direction close to the first liquid outlet structure 104, driven by the connecting rod 8, all the deformable liquid guiding tubes 2 at one end away from the first liquid outlet structure 104 move toward the direction away from the axis of the main body 1, and the deformable liquid guiding structure expands outward as a whole; when the pull rod 6 drives the piston 7 to move toward the direction away from the first liquid outlet structure 104, driven by the connecting rod 8, all the deformable liquid guiding tubes 2 at one end away from the first liquid outlet structure 104 move toward the direction close to the axis of the main body 1, and the deformable liquid guiding structure contracts as a whole.

[0055] In this embodiment, if Figure 2 As shown, the liquid storage chamber 101 and the guide chamber 102 are arranged in sequence along the axial direction of the main body 1, and the axes of the liquid storage chamber 101 and the guide chamber 102 both coincide with the axis of the main body 1. The booster locking positioning cylinder 5 is sleeved on one end of the main body 1 where the liquid storage chamber 101 is provided. An isolation chamber 10 is provided inside the liquid storage chamber 101, and the liquid storage chamber 101 and the isolation chamber 10 are separated by an isolation sleeve 11. The axis of the isolation chamber 10 coincides with the axis of the main body 1, and one end of the pull rod 6 passes through the booster locking positioning cylinder 5 and the isolation chamber 10 in sequence and extends into the interior of the guide chamber 102.

[0056] Furthermore, the axis of the pull rod 6 coincides with the axis of the piston 7, and the pull rod 6 is rotatably connected to the piston 7. Figure 4-Figure 5As shown, the limiting device includes two first limiting assemblies and two second limiting assemblies. The two first limiting assemblies are both arranged on the outer wall of the pull rod, and the two first limiting assemblies are arranged at intervals along the circumference of the pull rod. The two second limiting assemblies are both arranged on the inner wall of the isolation sleeve, and the two second limiting assemblies are arranged at intervals along the circumference of the isolation sleeve. The first limiting assembly includes a plurality of first limiting teeth 18, and the second limiting assembly includes a plurality of second limiting teeth 17. All of the first limiting teeth 18 are sequentially arranged on the outer wall of the pull rod along the axial direction of the pull rod 6, and all of the second limiting teeth 17 are sequentially arranged on the inner wall of the isolation sleeve along the axial direction of the isolation sleeve 11.

[0057] In the first state (locked state), the two first limiting assemblies correspond to the two second limiting assemblies, and the first limiting teeth 18 can be supported on the second limiting teeth 17. The first limiting teeth 18 and the second limiting teeth 17 limit each other, limiting the movement of the pull rod 6 along its own axis. It should be noted that there is a one-to-one correspondence between the first limiting teeth 18 and the second limiting teeth 17, with each first limiting tooth 18 supporting each second limiting tooth 17.

[0058] In the second state (unlocked state), the first and second limiting assemblies are offset from each other, allowing the second limiting assembly to pass between the two first limiting assemblies. When the first and second limiting assemblies are offset from each other, the first limiting teeth 18 and the second limiting teeth 17 are simultaneously offset from each other, allowing the pull rod 6 to move freely along its own axis without being restricted.

[0059] During use, when the deformable liquid-conducting structure has expanded to the desired size, the pull rod 6 is rotated to allow the first limiting teeth 18 to rest on the second limiting teeth 17, thereby limiting the movement of the pull rod 6 and maintaining the desired size. To adjust the size of the deformable liquid-conducting structure, the pull rod 6 is rotated to offset the positions of the first limiting assembly and the second limiting assembly, allowing the pull rod 6 to be quickly moved to the desired position, thereby quickly completing the size adjustment of the deformable liquid-conducting structure.

[0060] In this embodiment, the first and second limiting teeth 18, 17 are preferably made of an elastic material, such as rubber. This configuration allows both the first and second limiting teeth 18, 17 to deform. Thus, in the first state, when a user applies force to the pull rod 6 that causes the first and second limiting teeth 18, 17 to deform and shift relative to each other, the pull rod 6 can also be moved along its own axis.

[0061] Further, refer to Figure 5 and Figure 11As shown, in order to facilitate pulling the rod 6 in the direction away from the elastic booster sleeve 4, the first limiting tooth 18 and the second limiting tooth 17 are respectively provided with first and second inclined surfaces 1701 of matching shapes. In the first state, when the first limiting tooth 18 and the second limiting tooth 17 are staggered from each other, the first and second inclined surfaces 1701 fit together.

[0062] In this embodiment, in order to facilitate pulling the pull rod 6 , a pull ring 14 is provided at one end of the pull rod 6 away from the piston 7 , and the pull ring 14 is disposed outside the booster locking positioning cylinder 5 .

[0063] In this embodiment, specifically, the pull rod 6 passes through the piston 7 , and a limiting ring 15 is provided at the bottom end of the pull rod 6 for limiting the separation of the pull rod 6 and the piston 7 , so as to realize the rotational connection between the pull rod 6 and the piston 7 .

[0064] In this embodiment, the number of the first limit components and the second limit components are both two, the two first limit components are arranged on both sides of the pull rod 6, and the two second limit components are arranged on both sides of the inner wall of the isolation sleeve 11, and the first limit components and the second limit components correspond one to one.

[0065] In this embodiment, if Figure 2 、 Figure 6 and Figure 7 As shown, each deformable liquid conduit 2 is provided with a drainage structure 202 at one end away from the first liquid outlet structure 104, which is connected to the interior of the deformable liquid conduit 2. The ends of all deformable liquid conduits 2 away from the first liquid outlet structure 104 can be in contact with each other (initial state). When the ends of all deformable liquid conduits 2 away from the first liquid outlet structure 104 are in contact with each other, each drainage structure 202 is blocked. When the ends of all deformable liquid conduits 2 away from the first liquid outlet structure 104 are separated from each other, each drainage structure 202 is opened. The function of the drainage structure 202 is to ensure that the liquid medicine eventually flows out through the hole, preventing residual liquid medicine from being wasted. In this embodiment, the drainage structure 202 is specifically a drainage hole.

[0066] In this embodiment, if Figure 9 As shown, the flexible inner shell 3 is provided with a plurality of positioning grooves in the circumference, and the inner side wall of the elastic booster sleeve 4 is provided with a plurality of positioning pieces 13 in the circumference. The positioning pieces 13 correspond to the positioning grooves one by one, and each positioning piece 13 is arranged in its corresponding positioning groove.

[0067] In this embodiment, if Figure 3 As shown, a portion of the main body 1 protrudes to form a limiting boss 103, one end of the liquid outlet channel is arranged at an end of the limiting boss 103 close to the deformable liquid guiding structure, and the other end of the liquid outlet channel is connected to the liquid storage cavity 101. A limiting step is provided on the inner wall of the flexible inner shell 3, and the limiting boss 103 is provided inside the flexible inner shell 3, and the limiting boss 103 is against the limiting step.

[0068] In this embodiment, if Figure 1 As shown, in order to facilitate the separation of the elastic booster sleeve 4 from the inner shell, a plurality of cracks 401 are circumferentially provided at one end of the elastic booster sleeve 4 away from the first liquid outlet structure 104 .

[0069] In this embodiment, as shown in Figure 1, two guide plates 12 are symmetrically provided on opposite sides of the elastic booster sleeve 4. The two guide plates 12 protrude from the side walls of the elastic booster sleeve 4. The guide plates 12 can ensure that the main body 1, the deformable liquid guide component and the flexible inner shell 3 are installed in the elastic booster sleeve 4, while also helping the elastic booster sleeve 4 to withdraw from the vagina and keep the vaginal applicator 100 in a suitable position in the vagina. The two guide plates 12 can be arranged according to the Figure 1 The method shown is set at one end of the elastic booster sleeve 4, and can also be set as shown. Figure 10 As shown, it is arranged between the two ends of the elastic booster sleeve 4, and the specific position depends on the actual situation.

[0070] In this embodiment, if Figure 2 As shown, a limit block 16 is provided inside the guide cavity 102 , and the limit block 16 is used to limit the maximum stroke of the piston 7 when it moves toward the direction close to the first liquid outlet structure 104 .

[0071] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A vaginal drug delivery device, characterized in that: include: A main body, wherein a liquid storage cavity is provided inside the main body, and a liquid inlet structure and a plurality of first liquid outlet structures are provided on the main body, wherein the liquid inlet structure is used to feed liquid into the liquid storage cavity, and the first liquid outlet structures are used to discharge the liquid inside the liquid storage cavity, and all the first liquid outlet structures are arranged along the circumference of the main body; a deformable liquid-conducting structure comprising a plurality of deformable liquid-conducting tubes arranged along the circumference of the main body, the deformable liquid-conducting tubes corresponding one-to-one with and communicating with the first liquid-discharging structure, the ends of each deformable liquid-conducting tube remote from the first liquid-discharging structure being sealed, and each deformable liquid-conducting tube being provided with a plurality of second liquid-discharging structures along its length, the second liquid-discharging structures being used to discharge liquid from the interior of the deformable liquid-conducting tube; a contraction and expansion device, the contraction and expansion device being used to move the ends of all the deformable liquid conduits away from the first liquid outlet structure in a direction away from the axis of the main body, or to move the ends of all the deformable liquid conduits away from the first liquid outlet structure in a direction toward the axis of the main body; A flexible inner shell, made of a flexible water-absorbing material, and wrapped around the entire first liquid outlet structure and the deformable liquid guide structure; An elastic booster sleeve, which is sleeved on the outside of the flexible inner shell; a boosting and locking positioning cylinder, wherein the boosting and locking positioning cylinder is sleeved on the main body and detachably connected to the main body, and an end of the boosting and locking positioning cylinder close to the first liquid outlet structure is embedded in an end of the flexible inner shell close to the first liquid outlet structure; The expansion and contraction device includes: a pull rod, a piston and a plurality of connecting rods, a guide cavity is provided inside the main body, the piston can be slidably arranged in the guide cavity, and the outer wall of the piston is in contact with the inner wall of the guide cavity, each of the deformable liquid guide tubes is provided with a connecting ear, and the connecting ear corresponds to and is connected to the deformable liquid guide tube one by one, and the main body is circumferentially provided with a plurality of grooves connected to the guide cavity, the connecting ear extends into the guide cavity through the groove body, the connecting ear is slidably connected to the groove body, and a groove body is provided inside the groove body for limiting the direction of the connecting ear away from the first outlet A limiting structure for the direction movement of the liquid structure, the connecting rods and the connecting ears correspond one to one, one end of each connecting rod is hingedly connected to the piston, and the other end of each connecting rod is hingedly connected to the corresponding connecting ear, the groove body is used to avoid the connecting rod and the connecting ear, one end of the pull rod extends into the guide cavity and is connected to the piston; it also includes a limiting device, the limiting device is arranged on the main body, and the limiting device can make the pull rod hover at multiple positions along the axial direction of the main body; the elastic booster sleeve is circumferentially provided with multiple cracks at one end away from the first liquid outlet structure.

2. The vaginal drug delivery device according to claim 1, characterized in that: The liquid storage chamber and the guide chamber are arranged in sequence along the axial direction of the main body, and the axes of the liquid storage chamber and the guide chamber coincide with the axis of the main body. The booster locking positioning cylinder is sleeved on one end of the main body where the liquid storage chamber is provided. An isolation chamber is provided inside the liquid storage chamber, and the liquid storage chamber and the isolation chamber are separated by an isolation sleeve. The axis of the isolation chamber coincides with the axis of the main body. One end of the pull rod passes through the booster locking positioning cylinder and the isolation chamber in sequence and extends into the interior of the guide chamber.

3. The vaginal drug delivery device according to claim 2, characterized in that: The axis of the pull rod coincides with the axis of the piston, and the pull rod is rotationally connected to the piston. The limiting device includes two first limiting components and two second limiting components. The two first limiting components are both arranged on the outer wall of the pull rod, and the two first limiting components are arranged at intervals along the circumference of the pull rod. The two second limiting components are both arranged on the inner wall of the isolation sleeve, and the two second limiting components are arranged at intervals along the circumference of the isolation sleeve. The first limiting component includes a plurality of first limiting teeth, and the second limiting component includes a plurality of second limiting teeth. All of the first limiting teeth are sequentially arranged on the outer wall of the pull rod along the axial direction of the pull rod, and all of the second limiting teeth are sequentially arranged on the inner wall of the isolation sleeve along the axial direction of the isolation sleeve; when in the first state, the two first limiting components correspond to the positions of the two second limiting components respectively, and the first limiting tooth can be supported on the second limiting tooth; when in the second state, the position of the first limiting component is staggered with the position of the second limiting component.

4. The vaginal drug delivery device according to claim 3, characterized in that: The pull rod passes through the piston, and a limiting ring is provided at the bottom end of the pull rod for limiting the separation of the pull rod from the piston.

5. The vaginal drug delivery device according to claim 3, characterized in that: There are two first limiting assemblies and two second limiting assemblies, two first limiting assemblies are arranged on both sides of the pull rod, and two second limiting assemblies are arranged on both sides of the inner wall of the isolation sleeve, and the first limiting assemblies and the second limiting assemblies correspond one to one.

6. The vaginal drug delivery device according to claim 1, characterized in that: The end of each of the deformable liquid guiding tubes away from the first liquid outlet structure is provided with a drainage structure connected to the interior of the deformable liquid guiding tube. The ends of all of the deformable liquid guiding tubes away from the first liquid outlet structure can fit together, and when the ends of all of the deformable liquid guiding tubes away from the first liquid outlet structure fit together, each of the drainage structures is blocked.

7. The vaginal drug delivery device according to claim 1, wherein: The flexible inner shell is provided with a plurality of positioning grooves in the circumference thereof, and the inner side wall of the elastic booster sleeve is provided with a plurality of positioning pieces in the circumference thereof. The positioning pieces correspond to the positioning grooves one by one, and each positioning piece is provided in its corresponding positioning groove.

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