A visual vaginal dilator

Abstract

The present invention relates to the technical field of medical devices and discloses a visual vaginal dilator, comprising a handle connected to a lower dilator nozzle, a pair of hinged rods disposed at the upper end of the handle, a pressing ring rotatably disposed at the hinged rods, an upper dilator nozzle connected to the pressing ring, the upper and lower dilator nozzles being symmetrically positioned, a flap rotatably disposed at the handle, a ratchet bar disposed on the flap, a latching tooth disposed on the inner wall of the pressing ring, the ratchet bar engaging the latching tooth. Both the upper and lower dilator nozzles are radially bendable, the upper dilator nozzle having a plurality of hooks disposed horizontally on its inner wall, and the lower dilator nozzle having a latching groove corresponding to the hooks. In the bent state, the hooks engage in the latching grooves, and both the upper and lower dilator nozzles are open ring-shaped, with the upper dilator nozzle covering the outer side of the lower dilator nozzle. Before insertion, the dilator nozzles are curved into a curled shape, with the upper dilator nozzle covering the outer side of the lower dilator nozzle. The insertion portion of the vaginal dilator curls into a cylindrical shape with a smaller diameter, reducing resistance during insertion and patient discomfort.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a visual vaginal dilator. Background Art

[0002] A vaginal dilator is a common gynecological medical device, typically made of medical-grade plastic or stainless steel. Its main structure consists of two openable blades and a handle. During gynecological examinations or treatments, the doctor gently inserts it into the vagina and slowly expands the blades to open the vaginal walls and fully expose the cervix and vaginal interior. This procedure is crucial for performing Pap smears, sampling vaginal discharge, assessing the condition of the vaginal walls or cervix, inserting an intrauterine device, performing certain minor surgeries or treatments, and observing the position of the fetal head during labor.

[0003] Patent publication number CN117426737A discloses a vaginal dilator comprising an upper leaf, a handle, a lower leaf, and a handle. The upper leaf is fixedly connected to the handle, and the lower leaf is fixedly connected to the handle. The handle is hinged to the handle. When the end of the handle facing away from the upper leaf approaches the end of the handle facing away from the lower leaf, the upper and lower leaves move away from each other. The vaginal dilator also includes a pair of side leaves, each hinged to the handle and located on either side of a path plane along which the upper and lower leaves rotate relative to each other. The upper leaf has two mating portions that, when the upper leaf rotates away from the lower leaf, push the corresponding side leaves away from the path plane. When the upper and lower leaves are closed, the ends of the side leaves away from the handle enter the receiving grooves of the upper and lower leaves. In the present invention, when operating the vaginal dilator, a physician only needs to operate the handle in one step to cause the side leaves to automatically open under the push of the mating portions of the upper leaf.

[0004] The existing technology has the following defects:

[0005] Existing duckbill vaginal dilators have obvious deficiencies in practical applications. The insertion part is designed to be wide, which will exert great pressure on the patient's vaginal wall during insertion, which can easily cause pain, discomfort, and even mucosal damage. Moreover, the shape of this type of dilator is relatively fixed, and it is difficult to adapt to the physiological structure differences of different patients. This discomfort is especially severe for patients with vaginal stenosis, postoperative scar contracture, or those undergoing examination for the first time. In addition, the wider insertion part may affect the visual field exposure during operation, and the doctor needs to spend more energy to adjust the position, which not only increases the patient's psychological pressure, but also affects the diagnosis and treatment efficiency to a certain extent. Summary of the Invention

[0006] In view of the above problems in the prior art, a visual vaginal dilator is proposed.

[0007] In one aspect of the present application, a visual vaginal dilator is provided, the purpose of which is to make the curvature of the dilator mouth of a traditional vaginal dilator adjustable, so that the dilator mouth arc is curled before the dilator is inserted, thereby reducing the resistance during insertion and the patient's discomfort.

[0008] The technical solution of the present invention is: a visual vaginal dilator, comprising a handle, a lower expansion nozzle connected to the handle, a pair of hinged rods provided at the upper end of the handle, a pressing ring rotatably provided at the hinged rods, an upper expansion nozzle connected to the pressing ring, the upper expansion nozzle and the lower expansion nozzle being in symmetrical positions, a flip cover rotatably provided at the handle, a ratchet bar 1 provided on the flip cover, a latching tooth 1 provided on the inner wall of the pressing ring, the ratchet bar 1 meshing with the latching tooth 1;

[0009] The upper expansion nozzle and the lower expansion nozzle are both made of elastic material and can be bent radially. A plurality of hooks are horizontally arranged on the inner wall of the upper expansion nozzle, and a slot corresponding to the hook is arranged in the lower expansion nozzle. In the bent state, the hook is engaged in the slot, and the upper expansion nozzle and the lower expansion nozzle are both open ring-shaped, and the upper expansion nozzle is covered on the outside of the lower expansion nozzle.

[0010] By adopting the above scheme, the upper expansion nozzle and the lower expansion nozzle are set to have adjustable curvature, and the expansion nozzle arc is curled before the expander is inserted. The upper expansion nozzle is covered on the outside of the lower expansion nozzle, and the insertion part is curled into a column with a smaller diameter as a whole, thereby reducing the resistance during insertion and the patient's discomfort.

[0011] Furthermore, an endoscope is provided in the endoscope tube, and the endoscope is connected to a wire which passes through the lower end of the flip cover.

[0012] By adopting the above solution, the positioning and detachable connection of the endoscope are achieved by providing an endoscope tube.

[0013] Furthermore, a flushing pipe is provided on the upper side of the inner wall of the pressing ring.

[0014] With the above solution, a flushing tube is provided to flush the vagina during internal examination.

[0015] Furthermore, a bending component is embedded in the upper expansion nozzle to control the bending of the upper expansion nozzle;

[0016] The bending assembly includes a support plate embedded in the upper expansion mouth, a plurality of V-shaped bending grooves are axially arranged on the outer wall of the support plate, a sliding groove is axially arranged on the top of the support plate, a sliding rod is arranged in the sliding groove, a plurality of arc grooves are equidistantly arranged on the outer wall of the support plate, and the two ends of the arc groove extend to the two parallel sides of the support plate respectively, a tensioning rope is slidably arranged in the arc groove, the tensioning rope passes through the sliding rod, and the two ends of the tensioning rope are connected to the two ends of the arc groove on the support plate, and a pressing rod is connected to the end of the sliding rod close to the pressing ring, and the pressing rod passes through the ring wall of the pressing ring.

[0017] By adopting the above scheme, a bending component is set up. After the expansion part is inserted, the sliding rod is pushed to tension the multiple tensioning ropes. The tensioned tensioning ropes close the multiple V-shaped bending grooves on the outer wall of the support plate, thereby changing the curvature of the support plate, and then the upper expansion mouth is expanded into an arc sheet, reducing discomfort during insertion.

[0018] Furthermore, the cross section of the sliding rod is I-shaped, and rope grooves for accommodating tensioning ropes are provided on both sides of the sliding rod. A plurality of through holes for the tensioning ropes to pass through are provided on the sliding rod.

[0019] By adopting the above solution, the rope groove and the through hole are provided to accommodate the bent tension rope when the sliding rod is displaced and slid, thereby reducing the local stress of the tension rope.

[0020] Furthermore, a draw hook is provided at the end of the tensioning rope, and a clamping hole is provided at the end of the arc-shaped groove, and the draw hook is clamped in the clamping hole.

[0021] By adopting the above solution, a draw hook is provided to fix the two ends of the tensioning rope, so that the tension of the tensioning rope acts on the two parallel sides of the support plate.

[0022] Furthermore, the pressing rod is provided with a locking cavity at the place where the pressing ring passes through, the upper wall of the locking cavity is provided with a second ratchet bar, the upper side of the pressing rod is provided with a second locking tooth, the second locking tooth is engaged with the second ratchet bar, and the lower wall of the locking cavity is provided with a spring sheet, which abuts against the pressing rod.

[0023] By adopting the above solution, the second tooth is engaged with the second ratchet bar, so that the pressing rod can be locked in one direction to prevent the support plate from rebounding. Pressing the pressing rod downward can contact and lock it, so that the pressing rod is reset and the support plate returns to the bent state.

[0024] Furthermore, the arc-shaped groove is arranged obliquely along the outer wall of the support plate.

[0025] By adopting the above solution, by tilting the outer wall of the support plate, the bending angle of the tensioning rope is reduced when the sliding rod is pushed, thereby reducing the resistance to pushing the sliding rod and reducing the tensile stress at the bending point of the tensioning rope.

[0026] Furthermore, in a natural state, the upper expansion nozzle remains in a bent state, and the lower expansion nozzle remains in an expanded state.

[0027] With the above solution, the support plate is unfolded by bending the component after the expansion part is inserted into the vagina, thereby unfolding the upper expansion mouth. After the lower expansion mouth loses the restriction of the upper expansion mouth, it naturally unfolds by utilizing its own elasticity.

[0028] Beneficial effects of the present invention:

[0029] 1. Through the above solution, the upper expansion nozzle and the lower expansion nozzle of the expander are designed to be separate and detachable, the handle and the lower expansion nozzle are integrally formed, and the pressing ring and the upper expansion nozzle are integrally formed, which is convenient for disassembly, assembly and maintenance.

[0030] 2. By setting the upper expansion nozzle and the lower expansion nozzle to have adjustable curvature, the expansion nozzle arc is curled before the expander is inserted, the upper expansion nozzle is covered on the outside of the lower expansion nozzle, and the insertion part is curled into a column with a smaller diameter as a whole, reducing the resistance during insertion and the patient's discomfort.

[0031] 3. By setting up a bending component, after the expansion part is inserted, the sliding rod is pushed to tension the multiple tensioning ropes. The tensioned tensioning ropes close the multiple V-shaped bending grooves on the outer wall of the support plate, thereby changing the curvature of the support plate, and then the upper expansion mouth is expanded into an arc sheet, reducing discomfort during insertion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a three-dimensional diagram of the visual vaginal dilator in Example 1 of the present invention;

[0033] Figure 2 For the present invention Figure 1 Other perspectives of

[0034] Figure 3 For the present invention Figure 1 Left view of;

[0035] Figure 4 For the present invention Figure 3 Cross-sectional view at AA in the middle;

[0036] Figure 5 This is a three-dimensional diagram of the visual vaginal dilator in Example 2 of the present invention;

[0037] Figure 6 This is a cross-sectional view of the visual vaginal dilator in Example 2 of the present invention;

[0038] Figure 7 For the present invention Figure 6 A magnified view of the structure at point B in the middle;

[0039] Figure 8 1. It is a front view of the parking component of the visual vaginal dilator in the second embodiment of the present invention;

[0040] Figure 9 For the present invention Figure 8 Cross-sectional view at CC;

[0041] Figure 10 For the present invention Figure 8 Cross-sectional view at DD in the middle;

[0042] Figure 11This is a three-dimensional diagram of the bending component of the visual vaginal dilator in Example 2 of the present invention;

[0043] Figure 12 This is a disassembled diagram of the bending component of the visual vaginal dilator in Example 2 of the present invention;

[0044] Figure 13 2 is a cross-sectional view of a sliding rod in a visual vaginal dilator according to a second embodiment of the present invention;

[0045] Figure 14 This is a side view of the sliding rod in the visual vaginal dilator in Example 2 of the present invention.

[0046] In the picture:

[0047] 1. Handle; 2. Lower expansion nozzle; 3. Articulated rod; 4. Pressing ring; 5. Upper expansion nozzle; 6. Flip cover; 7. Ratchet bar 1; 8. Tooth 1; 9. Hook; 10. Slot; 11. Endoscope; 12. Endoscope; 13. Guide wire; 14. Irrigation tube; 15. Bending assembly; 16. Support plate; 17. V-shaped bending groove; 18. Sliding groove; 19. Sliding rod; 20. Arc groove; 21. Tension rope; 22. Pressing rod; 23. Rope groove; 24. Through hole; 25. Retractor; 26. Engaging cavity; 27. Ratchet bar 2; 28. Tooth 2; 29. ​​Shrapnel. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] Example 1, reference Figure 1-4 , which is the first embodiment of the present invention, provides a visual vaginal dilator, including an ergonomic handle 1, with an arc-shaped lower expansion mouth 2 integrally formed on the handle 1, a pair of reinforced hinged rods 3 are provided on the upper end of the handle 1 through a precision rotating shaft, and an annular pressing ring 4 is rotatably provided on the top of the hinged rod 3, and an expansion mouth 5 on a bionic curved surface is rigidly connected to the outside of the pressing ring 4, the upper expansion mouth 5 and the lower expansion mouth 2 are in mirror-symmetrical positions and form a quasi-circular expansion cavity, an anti-accidental touch flip cover 6 is rotatably provided in the middle of the handle 1, and a helical ratchet bar 7 is provided on the inside of the flip cover 6, and an adaptive latch tooth 8 is correspondingly processed on the inner wall of the pressing ring 4, and the ratchet bar 7 and the latch tooth 8 form a one-way self-locking meshing mechanism.

[0050] Through the above scheme, the upper expansion nozzle 5 and the lower expansion nozzle 2 of the expander adopt a modular split and detachable design: the handle 1 and the lower expansion nozzle 2 are formed by integrated fusion injection molding, and the pressing ring 4 and the upper expansion nozzle 5 are formed by medical plastic injection molding. The two are connected by a quick-release hinge shaft to achieve tool-free rapid disassembly and assembly; when the flip cover 6 is pressed down, the ratchet bar 7 drives the latch 8 to make the pressing ring 4 rotate progressively in gears, driving the upper expansion nozzle 5 to rise steadily, forming a uniformly expanded elliptical channel; the ratchet-latch engagement system has an automatic anti-rebound feature, maintaining a stable expansion state during surgery; the split structure facilitates independent sterilization, and expansion nozzle modules of different sizes can be replaced as needed to meet clinical needs.

[0051] Reference Figure 4 The inner wall of the handle 1 is closely provided with an endoscope 11, an endoscope 12 is provided in the endoscope 11, and the endoscope 12 is connected with a wire 13, which passes through the lower end of the flip cover 6. By providing the endoscope 11, the positioning and detachable connection of the endoscope 12 are achieved.

[0052] Reference Figure 4 , pressing ring 4 inner wall upper side is provided with flushing tube 14. By arranging flushing tube 14, vagina is flushed when internal inspection.

[0053] Example 2, reference Figure 5-Figure 14 , which is the second embodiment of the present invention, and which is different from the first embodiment in that: Figures 8-10 Both the upper expansion nozzle 5 and the lower expansion nozzle 2 are made of medical-grade elastic polymer material, have excellent radial bending flexibility, and can adaptively adjust the curvature according to actual operational requirements. A number of elastic hooks 9 are distributed in a horizontal array on the inner wall of the upper expansion nozzle 5, while a corresponding slot 10 structure is provided on the inner side of the lower expansion nozzle 2. When the two are in a bent state, the hooks 9 and the slots 10 form a precise engagement mechanism, allowing the upper expansion nozzle 5 and the lower expansion nozzle 2 to form an open annular structure together, and the upper expansion nozzle 5 naturally covers the outer side of the lower expansion nozzle 2, forming a double-layer elastic support structure.

[0054] This design uses an innovative radian adjustable mechanism, which allows the expansion nozzle to be manually curled into a spiral closed shape before the dilator is inserted. At this time, the upper expansion nozzle 5 tightly covers the outer side of the lower expansion nozzle 2, so that the insertion part is overall contracted into a cylindrical configuration with a fine diameter. This morphological design can effectively reduce the tissue friction resistance during instrument insertion. At the same time, the combination of the smooth surface of the elastic material and the curled configuration can greatly reduce the mechanical stimulation to the human cavity mucosa, alleviate the patient's physiological discomfort during the operation from the structural design level, and improve the comfort and safety of clinical operation. In addition, the open ring configuration can be gradually expanded by external force after insertion, and the memory properties of the elastic material are used to restore the expanded state, ensuring the stable maintenance of the subsequent operating space.

[0055] Reference Figure 6-Figure 12 The bending assembly 15 embedded within the upper expansion nozzle 5 utilizes a sophisticated mechanical transmission structure designed to achieve precise and controllable curvature adjustment. This assembly is based on a medical-grade polymer support plate 16, whose outer wall features multiple V-shaped bending grooves distributed axially. These grooves feature a gradient depth design, endowing the support plate 16 with unique adaptive deformation properties. A sliding groove 18 runs axially through the top of the support plate 16, housing an axially slidable sliding rod 19. A damping buffer structure is provided between the sliding rod 19 and the support plate 16 to ensure smooth sliding.

[0056] The outer wall of the support plate 16 is also equidistantly distributed with a number of arc-shaped grooves 20. These grooves extend in an arc shape to the parallel sides of the support plate 16, forming a smooth mechanical conduction path. A flexible tensioning rope 21 is passed through each set of arc-shaped grooves 20. The tensioning rope 21 is made of biocompatible polyester material and has both high strength and low friction properties. The two ends of the tensioning rope 21 are respectively fixed to the two ends of the arc-shaped groove 20 on the support plate 16, and the middle part passes through the guide hole on the sliding rod 19 to form a closed-loop traction structure. The sliding rod 19 is connected to the pressing rod 22 near the operating end. The rod body passes through the guide channel on the side wall of the pressing ring 4, and the end extends to a position convenient for the operator to operate.

[0057] After the expander is inserted into the target area, the operator can push the sliding rod 19 axially by pressing the pressing rod 22. At this time, the tensioning rope 21 is synchronously tightened and generates radial traction. Under the action of the traction force, the V-shaped bending groove on the outer wall of the support plate 16 gradually closes, driving the support plate 16 as a whole to transform from a straight line to an arc surface structure with a preset curvature. In this process, the upper expansion nozzle 5 is synchronously expanded into an arc sheet as the support plate 16 deforms, and its expansion curvature is linearly corresponding to the displacement of the sliding rod 19. This design uses precise control of mechanical transmission to enable the expansion nozzle to maintain a compact columnar shape during insertion to reduce tissue friction. After it is in place, it can be expanded as needed to form a support surface, thereby reducing mucosal irritation while providing a stable space expansion effect for subsequent operations. The combination of flexible materials and mechanical transmission structures not only ensures the convenience of operation, but also avoids the risk of tissue damage that may be caused by rigid components.

[0058] Reference Figure 13-14 The cross section of the sliding rod 19 is an I-shape, and rope grooves 23 for accommodating the tensioning rope 21 are provided on both sides thereof. The sliding rod 19 is provided with a plurality of through holes 24 for the tensioning rope 21 to pass through.

[0059] The rope groove 23 and the through hole 24 are provided to accommodate the bent tension rope 21 when the sliding rod 19 is displaced and slid, thereby reducing the local stress of the tension rope 21 .

[0060] Reference Figure 12The end of the tensioning rope 21 is provided with a hook 25, and the end of the arc-shaped slot 20 is provided with a clamping hole, and the hook 25 is engaged in the clamping hole.

[0061] By providing a draw hook 25 for fixing both ends of the tensioning rope 21 , the tension of the tensioning rope 21 acts on the two parallel sides of the support plate 16 .

[0062] Reference Figure 6-Figure 7 The pressing rod 22 is provided with an annular engaging cavity 26 at the point where it penetrates the pressing ring 4. This cavity adopts an embedded structural design, forming an integrated mechanical support unit with the inner wall of the pressing ring 4. The upper wall of the engaging cavity 26 is inlaid with a second ratchet bar 27 made of medical-grade stainless steel. Its teeth are inclined at a gradually changing angle, forming a precise meshing structure with the second latching teeth 28 symmetrically distributed on the upper side of the pressing rod 22. These second latching teeth 28 are made of elastic memory alloy material, and the tooth tips are passivated. This ensures one-way locking with the second ratchet bar 27 while preventing wear and tear on the device caused by hard friction.

[0063] The lower wall of the engagement cavity 26 is equipped with a U-shaped spring clip 29. This clip 29 is precision-stamped from titanium-nickel alloy sheet material and exhibits excellent elastic recovery properties. The upper surface of the spring clip 29 maintains dynamic contact with the outer wall of the pressing rod 22. By continuously applying upward force, the second latching tooth 28 and the second ratchet bar 27 maintain a tight engagement. When the operator presses downward on the pressing rod 22, the spring clip 29 is squeezed and deformed, and the second latching tooth 28 slides along the inclined surface of the ratchet bar 27. This releases the engagement, allowing the pressing rod 22 to return freely upward.

[0064] This one-way locking mechanism ensures the stable maintenance of the deformation state of the support plate 16. When the tensioning rope 21 is tightened to unfold the support plate 16, the meshing action of the second latch tooth 28 and the second ratchet bar 27 can effectively resist the rebound tendency of the support plate 16 due to the elastic potential energy, ensuring that the expansion mouth maintains the preset arc shape. When it is necessary to release the lock, it is only necessary to apply downward pressure, and the elastic deformation of the spring piece 29 and the inclined guidance of the ratchet can make the pressing rod 22 smoothly reset, driving the support plate 16 to restore its initial bending state. The entire operation process conforms to the ergonomic design, which can not only ensure the safety of clinical operation through mechanical locking, but also achieve quick unlocking through simple pressing, while reducing the operator's operating burden and avoiding the risk of tissue irritation caused by instrument rebound.

[0065] Reference Figure 11 The arc groove 20 is arranged obliquely along the outer wall of the support plate 16.

[0066] By tilting the outer wall of the support plate 16 , the bending angle of the tensioning rope 21 is reduced when the sliding rod 19 is pushed, thereby reducing the resistance to pushing the sliding rod 19 and reducing the tensile stress at the bending portion of the tensioning rope 21 .

[0067] In a natural state, the upper expansion nozzle 5 remains in a bent state, and the lower expansion nozzle 2 remains in an expanded state.

[0068] The bending component 15 is used to unfold the support plate 16 after the expansion part is inserted into the vagina, so that the upper expansion nozzle 5 is unfolded, and the lower expansion nozzle 2 is naturally unfolded by its own elasticity after losing the restriction of the upper expansion nozzle 5.

[0069] The remaining structures are the same as those of Example 1.

[0070] During use, before insertion, the upper expansion nozzle 5 is in an open ring shape, and the lower expansion nozzle 2 is curled to fit the inner wall of the upper expansion nozzle 5. At this time, the hook 9 is engaged in the card groove 10, and the upper expansion nozzle 5 and the lower expansion nozzle 2 together form a column with a smaller diameter. Lubricating oil is applied to the outside of the column, and the column of the upper expansion nozzle 5 covering the lower expansion nozzle 2 is slowly sent into the vagina. After it is fully inserted, the pressing rod 22 is pushed, and the pressing rod 22 pushes the sliding rod 19 to slide in the sliding groove 18. During the sliding process of the sliding rod 19, the sliding rod 19 pulls the tensioning rope 21 passing through the through hole 24 and is gathered in the rope groove 23. When the tensioning rope 21 is tightened, the tightened tensioning rope 21 closes the multiple V-shaped bending grooves 17 on the outer wall of the support plate 16, thereby changing the curvature of the support plate 16, and then slowly unfolding the upper expansion nozzle 5 into an arc sheet. At this time, the hook 9 disengages from the slot 10, and the lower expansion nozzle 2 naturally unfolds using its own elasticity after losing the restriction of the upper expansion nozzle 5, so that the upper and lower expansion nozzles 2 are unfolded after insertion. At this time, the pressing ring 4 is pressed to rotate close to the handle 1, and the upper expansion nozzle 5 and the lower expansion nozzle 2 rotate and unfold along the hinged rod 3 to expand the vagina. Finally, the vaginal wall and cervix are inspected through the endoscope 12.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A visual vaginal dilator, comprising a handle (1), characterized in that: The handle (1) is connected to a lower expansion nozzle (2), a pair of hinged rods (3) are provided at the upper end of the handle (1), a pressing ring (4) is rotatably provided at the hinged rod (3), an upper expansion nozzle (5) is connected to the pressing ring (4), the upper expansion nozzle (5) and the lower expansion nozzle (2) are in symmetrical positions, a flip cover (6) is rotatably provided at the handle (1), a ratchet bar (7) is provided on the flip cover (6), a latch tooth (8) is provided on the inner wall of the pressing ring (4), and the ratchet bar (7) is meshed with the latch tooth (8); The upper expansion nozzle (5) and the lower expansion nozzle (2) are both made of elastic material and can be bent radially. A plurality of hooks (9) are horizontally arranged on the inner wall of the upper expansion nozzle (5), and a slot (10) corresponding to the hook (9) is arranged in the lower expansion nozzle (2). In the bent state, the hook (9) is engaged in the slot (10), and the upper expansion nozzle (5) and the lower expansion nozzle (2) are both in an open ring shape, and the upper expansion nozzle (5) covers the outer side of the lower expansion nozzle (2). The upper expansion nozzle (5) is embedded with a bending component (15) for controlling the bending of the upper expansion nozzle (5); The bending assembly (15) includes a support plate (16) embedded in the upper expansion nozzle (5), a plurality of V-shaped bending grooves (17) are axially arranged on the outer wall of the support plate (16), a sliding groove (18) is axially arranged on the top of the support plate (16), a sliding rod (19) is arranged in the sliding groove (18), a plurality of arc grooves (20) are equidistantly arranged on the outer wall of the support plate (16), the two ends of the arc groove (20) respectively extend to the two parallel sides of the support plate (16), a tensioning rope (21) is slidably arranged in the arc groove (20), the tensioning rope (21) passes through the sliding rod (19), the two ends of the tensioning rope (21) are connected to the two ends of the arc groove (20) on the support plate (16), and a pressing rod (22) is connected to the end of the sliding rod (19) close to the pressing ring (4), and the pressing rod (22) passes through the ring wall of the pressing ring (4); The cross section of the sliding rod (19) is an I-shaped one, and rope grooves (23) for accommodating the tensioning rope (21) are provided on both sides thereof. The sliding rod (19) is provided with a plurality of through holes (24) for the tensioning rope (21) to pass through.

2. The visual vaginal dilator according to claim 1, characterized in that: An endoscope (12) is provided in close contact with the inner wall of the handle (1), an endoscope (12) is provided in the endoscope (11), and the endoscope (12) is connected to a wire (13), which passes through the lower end of the flip cover (6).

3. The visual vaginal dilator according to claim 1, characterized in that: A flushing pipe (14) is provided on the upper side of the inner wall of the pressing ring (4).

4. The visual vaginal dilator according to claim 1, characterized in that: The end of the tensioning rope (21) is provided with a draw hook (25), and the end of the arc-shaped slot (20) is provided with a clamping hole, and the draw hook (25) is clamped in the clamping hole.

5. The visual vaginal dilator according to claim 1, characterized in that: The pressing rod (22) is provided with a locking cavity (26) at the position where the pressing ring (4) passes through, and a second ratchet bar (27) is provided on the upper wall of the locking cavity (26). A second latching tooth (28) is provided on the upper side of the pressing rod (22), and the second latching tooth (28) is engaged with the second ratchet bar (27). A spring piece (29) is provided on the lower wall of the locking cavity (26), and the spring piece (29) is against the pressing rod (22).

6. The visual vaginal dilator according to claim 1, characterized in that: The arc-shaped groove (20) is arranged obliquely along the outer wall of the support plate (16).

7. The visual vaginal dilator according to claim 1, characterized in that: In a natural state, the upper expansion nozzle (5) remains in a bent state, and the lower expansion nozzle (2) remains in an expanded state.

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