Visual vaginal dilator

Abstract

The invention relates to the technical field of medical equipment, and discloses a visual vaginal dilator which comprises a grab handle, a lower dilation nozzle connected to the grab handle, a pair of hinge rods arranged at the upper end of the grab handle, a pressing ring rotatably arranged at the hinge rods, an upper dilation nozzle connected to the pressing ring, the upper dilation nozzle and the lower dilation nozzle located at symmetrical positions, and a turning cover rotatably arranged at the grab handle. A first ratchet bar is arranged on the turning cover, first clamping teeth are arranged on the inner wall of the pressing ring, and the first ratchet bar is meshed with the first clamping teeth. Both the upper expansion nozzle and the lower expansion nozzle can be bent in the radial direction, a plurality of clamping hooks are horizontally arranged on the inner wall of the upper expansion nozzle, and clamping grooves corresponding to the clamping hooks are formed in the lower expansion nozzle. In the bending state, the clamping hook is clamped in the clamping groove, the upper expansion nozzle and the lower expansion nozzle are both in an open ring shape, and the upper expansion nozzle wraps the outer side of the lower expansion nozzle. According to the vaginal dilator, the dilation nozzle is curled in an arc shape before insertion, the upper dilation nozzle wraps the outer side of the lower dilation nozzle, the whole insertion part is curled into a column with a small diameter, and resistance during insertion and discomfort of a patient are reduced.

Description

Technical Field

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

[0002] Vaginal dilator is a common gynecological medical device, usually made of medical plastic or stainless steel. Its main structure consists of two openable blades and a handle. During gynecological examination or treatment, the doctor will gently insert it into the vagina and then slowly open the blades to stretch the vaginal wall and fully expose the cervix and the inside of the vagina. This operation is crucial for performing cervical smear examinations, sampling vaginal secretions, evaluating the condition of the vaginal wall or cervix, placing intrauterine contraceptive devices, performing certain minor surgeries or treatments, and observing the position of the fetal head during delivery.

[0003] A technical document with patent publication number CN117426737A discloses a vaginal dilator, including an upper leaf, a handle, a lower leaf and a handle, wherein the upper leaf is fixedly connected to the handle, the lower leaf is fixedly connected to the handle, the handle is hinged to the handle, when the end of the handle away from the upper leaf approaches the end of the handle away from the lower leaf, the upper leaf and the lower leaf move away from each other, the vaginal dilator also includes a pair of side leaves, both of which are hinged to the handle and are respectively located on both sides of the path plane of relative rotation of the upper leaf and the lower leaf, the upper leaf has two matching parts, the matching parts can push the corresponding side leaves to rotate in the direction away from the path plane when the upper leaf rotates away from the lower leaf, and when the upper leaf and the lower leaf are closed, the end of the side leaf away from the handle can enter the accommodating groove of the upper leaf and the lower leaf. In the present invention, when operating the vaginal dilator, the doctor only needs to operate the handle in one step, and the side leaves on both sides can be automatically opened under the push of the matching part of the upper leaf.

[0004] The prior art has the following defects: 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 differences in physiological structures of different patients, especially for patients with vaginal stenosis, postoperative scar contracture, or those who are undergoing examinations for the first time. This discomfort is even stronger. In addition, the wider insertion part may affect the exposure of the field of vision 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 efficiency of diagnosis and treatment to a certain extent. Summary of the invention

[0005] In view of the above problems in the prior art, a visual vaginal dilator is proposed.

[0006] In one aspect of the present application, a visual vaginal dilator is provided, and its purpose is to make the arc of the dilating mouth of a traditional vaginal dilator adjustable, make the arc of the dilating mouth curl before the dilator is inserted, and reduce the resistance during insertion and the discomfort of the patient.

[0007] The technical solution of the present invention is: a visual vaginal dilator, including a handle, a lower dilating mouth is connected to the handle, a pair of hinge rods are arranged at the upper end of the handle, a pressing ring is rotatably arranged at the hinge rod, an upper dilating mouth is connected to the pressing ring, the upper dilating mouth and the lower dilating mouth are in a symmetrical position, a flip cover is rotatably arranged at the handle, a first ratchet rack is arranged on the flip cover, a first engaging tooth is arranged on the inner wall of the pressing ring, and the first ratchet rack meshes with the first engaging tooth; Both the upper dilating mouth and the lower dilating mouth are made of elastic materials and can be radially bent. A plurality of hooks are horizontally arranged on the inner wall of the upper dilating mouth, and a slot corresponding to the hook is arranged in the lower dilating mouth; in the bent state, the hook is engaged in the slot, both the upper dilating mouth and the lower dilating mouth form an open ring shape, and the upper dilating mouth covers the outside of the lower dilating mouth.

[0008] By adopting the above scheme, by setting the upper dilating mouth and the lower dilating mouth to have an adjustable arc, making the arc of the dilating mouth curl before the dilator is inserted, with the upper dilating mouth covering the outside of the lower dilating mouth, the inserted part is integrally curled into a column with a smaller diameter, reducing the resistance during insertion and the discomfort of the patient.

[0009] Further, an endoscope tube is closely attached to the inner wall of the handle, an endoscope is arranged in the endoscope tube, the endoscope is connected with a wire, and the wire passes out from the lower end of the flip cover.

[0010] By adopting the above scheme, through the setting of the endoscope tube, the positioning and detachable connection of the endoscope are realized.

[0011] Further, a flushing tube is arranged on the upper side of the inner wall of the pressing ring.

[0012] By adopting the above scheme, through the setting of the flushing tube, the vagina is flushed during internal examination.

[0013] Further, a bending assembly is embedded in the upper dilating mouth for controlling the bending of the upper dilating mouth; The bending assembly includes a support plate embedded in the upper dilating 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 at the top of the support plate. A sliding rod is arranged in the sliding groove. A plurality of arc-shaped grooves are equidistantly arranged on the outer wall of the support plate. Both ends of the arc-shaped groove extend to two parallel sides of the support plate. A tensioning rope is slidably arranged in the arc-shaped groove. The tensioning rope passes through the sliding rod, and both ends of the tensioning rope are connected to both ends of the arc-shaped groove on the support plate. One end of the sliding rod close to the pressing ring is connected with a pressing rod, and the pressing rod passes out from the wall of the pressing ring.

[0014] With the above solution, by setting the bending component, after the expansion part is inserted, the sliding rod is pushed to tension multiple tension ropes. The tensioned tension ropes close the multiple V-shaped bending grooves on the outer wall of the support plate, realizing the change of the curvature of the support plate, and further expanding the upper expansion nozzle into an arc shape, reducing the discomfort during insertion.

[0015] Further, the cross-section of the sliding rod is I-shaped, and rope grooves for accommodating the tension ropes are provided on both sides thereof. A plurality of through holes for the tension ropes to pass through are provided on the sliding rod.

[0016] With the above solution, by setting the rope groove and the through hole, when the sliding rod moves and slides, it is used to accommodate the bent tension ropes, reducing the local stress of the tension ropes.

[0017] Further, a hook is provided at the end of the tension rope, and a clamping hole is provided at the end of the arc-shaped groove. The hook is clamped in the clamping hole.

[0018] With the above solution, by setting the hook, it is used to fix both ends of the tension rope, so that the pulling force of the tension rope acts on two parallel sides of the support plate.

[0019] Further, a clamping cavity is provided at the place where the pressing rod passes through the pressing ring. A second ratchet tooth bar is provided on the upper wall of the clamping cavity. A second clamping tooth is provided on the upper side of the pressing rod. The second clamping tooth meshes with the second ratchet tooth bar. A spring piece is provided on the lower wall of the clamping cavity, and the spring piece abuts against the pressing rod.

[0020] With the above solution, by the second clamping tooth meshing with the second ratchet tooth bar, the pressing rod can be locked unidirectionally, which is used to prevent the support plate from rebounding. Pressing the pressing rod downward can release the lock and reset the pressing rod, and the support plate returns to the bent state.

[0021] Further, the arc-shaped groove is inclined along the outer wall of the support plate.

[0022] With the above solution, by inclining the outer wall of the support plate, when the sliding rod is pushed, the bending angle of the tension rope is reduced, thereby reducing the resistance of pushing the sliding rod and reducing the tensile stress at the bent part of the tension rope.

[0023] Further, in the natural state, the upper expansion nozzle remains in a bent state, and the lower expansion nozzle remains in an unfolded state.

[0024] With the above solution, through the bending component, after the expansion part is inserted into the vagina, it is used to expand the support plate, so as to expand the upper expansion nozzle, and the lower expansion nozzle naturally expands by its own elasticity after losing the restriction of the upper expansion nozzle.

[0025] The beneficial effects of the present invention: 1. Through the above solution, the upper dilator nozzle and the lower dilator nozzle of the dilator are designed to be separable and detachable. The handle is integrally formed with the lower dilator nozzle, and the pressing ring is integrally formed with the upper dilator nozzle, which facilitates disassembly, assembly, and maintenance.

[0026] 2. By setting the upper dilator nozzle and the lower dilator nozzle to have adjustable arcs, the arcs of the dilator nozzles are curled before the dilator is inserted. The upper dilator nozzle covers the outside of the lower dilator nozzle, and the inserted part is curled into a column with a smaller diameter as a whole, reducing the resistance during insertion and the discomfort of the patient.

[0027] 3. By setting a bending component, after the dilating part is inserted, the sliding rod is pushed to tension multiple tension ropes. The tensioned tension ropes close multiple V-shaped bending grooves on the outer wall of the support plate, realizing a change in the arc of the support plate, and further expanding the upper dilator nozzle into an arc-shaped sheet, reducing the discomfort during insertion. Description of the Drawings

[0028] Figure 1 Is a three-dimensional view of the visible vaginal dilator in Embodiment 1 of the present invention; Figure 2 Of the present invention Figure 1 Other perspectives; Figure 3 Of the present invention Figure 1 Left view; Figure 4 Of the present invention Figure 3 Cross-sectional view at A-A in the present invention; Figure 5 Is a three-dimensional view of the visible vaginal dilator in Embodiment 2 of the present invention; Figure 6 Is a cross-sectional view of the visible vaginal dilator in Embodiment 2 of the present invention; Figure 7 Of the present invention Figure 6 Enlarged view of the structure at B in the present invention; Figure 8 Is a front view of the stopping component in the visible vaginal dilator in Embodiment 2 of the present invention; Figure 9 Of the present invention Figure 8 Cross-sectional view at C-C in the present invention; Figure 10 Of the present invention Figure 8 Cross-sectional view at D-D in the present invention; Figure 11 Is a three-dimensional view of the bending component in the visible vaginal dilator in Embodiment 2 of the present invention; Figure 12 Is an exploded view of the bending component in the visible vaginal dilator in Embodiment 2 of the present invention; Figure 13 Is a cross-sectional view of the sliding rod in the visible vaginal dilator in Embodiment 2 of the present invention; Figure 14 This is a side view of the sliding rod in the visual vaginal dilator in the second embodiment of the present invention.

[0029] In the figure: 1. Handle; 2. Lower dilating nozzle; 3. Hinge rod; 4. Pressing ring; 5. Upper dilating nozzle; 6. Flap; 7. First ratchet rack; 8. First engaging tooth; 9. Hook; 10. Card slot; 11. Endoscope tube; 12. Endoscope; 13. Conducting wire; 14. Flushing tube; 15. Bending assembly; 16. Support plate; 17. V-shaped bending groove; 18. Sliding groove; 19. Sliding rod; 20. Arc-shaped groove; 21. Tightening rope; 22. Pressing rod; 23. Rope groove; 24. Through hole; 25. Hook; 26. Engaging cavity; 27. Second ratchet rack; 28. Second engaging tooth; 29. Elastic piece. Detailed implementation manners

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention is provided in conjunction with the accompanying drawings of the specification.

[0031] Example 1, referring to Figures 1-4 , which is the first embodiment of the present invention, provides a visual vaginal dilator, including an ergonomic handle 1. An arc-shaped lower dilating nozzle 2 is integrally formed and connected to the handle 1. A pair of reinforced hinge rods 3 are arranged at the upper end of the handle 1 through a precision rotating shaft. A ring-shaped pressing ring 4 is rotatably arranged at the top of the hinge rod 3. A bionic curved upper dilating nozzle 5 is rigidly connected to the outer side of the pressing ring 4. The upper dilating nozzle 5 and the lower dilating nozzle 2 are in a mirror-symmetrical position and form a quasi-circular dilating cavity. A misoperation prevention flap 6 is rotatably arranged in the middle of the handle 1. An inclined-tooth first ratchet rack 7 is arranged on the inner side of the flap 6. An adaptive first engaging tooth 8 is correspondingly machined on the inner wall of the pressing ring 4. The first ratchet rack 7 and the first engaging tooth 8 form a one-way self-locking meshing mechanism.

[0032] Through the above solution, the upper dilating nozzle 5 and the lower dilating nozzle 2 of the dilator adopt a modular split and detachable design: the handle 1 and the lower dilating nozzle 2 are formed by melt-integral injection molding, and the pressing ring 4 and the upper dilating nozzle 5 are injection molded with medical plastics. The two are connected by a quick-release hinge shaft to achieve tool-free and rapid disassembly and assembly; when the flap 6 is pressed down, the first ratchet rack 7 drives the first engaging tooth 8 to make the pressing ring 4 rotate in a stepped and progressive manner, driving the upper dilating nozzle 5 to smoothly lift, forming a uniformly expanded quasi-elliptical channel; the ratchet-engaging tooth meshing system has an automatic anti-rebound characteristic, and the expanded state is kept stable during the operation; the split structure is convenient for independent sterilization treatment, and different-sized dilating nozzle modules can be replaced as needed to meet clinical needs.

[0033] Referring to Figure 4, an endoscope tube 11 is closely attached to the inner wall of the handle 1, an endoscope 12 is arranged inside the endoscope tube 11, the endoscope 12 is connected with a wire 13, and the wire 13 passes out from the lower end of the flip cover 6. By arranging the endoscope tube 11, the positioning and detachable connection of the endoscope 12 are realized.

[0034] Refer to Figure 4 , a flushing tube 14 is arranged on the upper side of the inner wall of the pressing ring 4. By arranging the flushing tube 14, the vagina is flushed during internal examination.

[0035] Example 2, refer to Figures 5-14 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is: specifically refer to Figures 8-10 , both the upper dilator nozzle 5 and the lower dilator nozzle 2 are made of medical-grade elastic polymer materials, with excellent radial bending flexibility and can adaptively adjust the arc according to actual operation requirements. Among them, a number of elastic hook 9 structures are distributed on the inner wall of the upper dilator nozzle 5 in a horizontal array manner, and a matching slot 10 structure is correspondingly arranged on the inner side of the lower dilator nozzle 2. When the two are in a bent state, the hook 9 and the slot 10 form a precisely engaged locking mechanism, so that the upper dilator nozzle 5 and the lower dilator nozzle 2 jointly form an open annular structure, and the upper dilator nozzle 5 naturally wraps around the outside of the lower dilator nozzle 2 to form a double-layer elastic support structure.

[0036] This design adopts an innovative arc-adjustable mechanism. Before the dilator is inserted, the dilator nozzle can be manually curled into a spiral closed shape. At this time, the upper dilator nozzle 5 tightly wraps around the outside of the lower dilator nozzle 2, making the inserted part as a whole converge into a columnar configuration with a delicate diameter. This morphological design can effectively reduce the tissue friction resistance during the insertion of the instrument. 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 mucosa of the human body cavity, relieve the patient's physiological discomfort during the operation from the structural design level, and improve the comfort and safety of clinical operations. In addition, the open annular configuration can be gradually unfolded by an external force after insertion, and the dilated state can be restored by using the memory characteristics of the elastic material to ensure the stable maintenance of the subsequent operation space.

[0037] Refer to Figures 6-12 , the bending component 15 embedded in the upper dilator nozzle 5 adopts a delicate mechanical conduction structure design to achieve precise and controllable arc adjustment. This component takes the medical-grade polymer support plate 16 as the core structure, and multiple groups of V-shaped bending grooves are distributed along the axial direction on its outer wall. These grooves adopt a gradually changing depth design, endowing the support plate 16 with unique self-adaptive deformation characteristics. A sliding groove 18 penetrating the axial direction is opened at the top of the support plate 16, and a sliding rod 19 that can slide axially is assembled in the groove. A damping buffer structure is arranged between the sliding rod 19 and the support plate 16 to ensure the smoothness of the sliding process.

[0038] The outer wall of the support plate 16 is also equidistantly distributed with a number of arc-shaped grooves 20, which extend in an arc shape to the parallel sides of the support plate 16 to form a smooth mechanical conduction path. A flexible tension rope 21 is inserted into each group of arc-shaped grooves 20. The tension rope 21 is made of biocompatible polyester material and has both high strength and low friction properties. The two ends of the tension 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 of the side wall of the pressing ring 4, and the end extends to a position convenient for the operator to operate.

[0039] After the expander is inserted into the target part, the operator can push the sliding rod 19 to move axially by pressing the pressing rod 22. At this time, the tension rope 21 is synchronously tightened and generates radial traction. Under the action of traction, 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 a curved surface structure with a preset curvature. In this process, the upper expansion nozzle 5 is synchronously expanded into an arc sheet with the deformation of the support plate 16, and its expansion curvature is linearly corresponding to the displacement of the sliding rod 19. Through precise control of mechanical transmission, this design allows the expansion nozzle to maintain a compact columnar shape during insertion to reduce tissue friction, and can be expanded as needed to form a support surface after it is in place, thereby reducing mucosal irritation while providing a stable space expansion effect for subsequent operations. The combination of flexible materials and mechanical conduction structures not only ensures the convenience of operation, but also avoids the risk of tissue damage that may be caused by rigid components.

[0040] Reference Figures 13-14 The cross section of the sliding rod 19 is an I-shaped one, and rope grooves 23 for accommodating the tensioning rope 21 are arranged 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.

[0041] By providing the rope groove 23 and the through hole 24 , when the sliding rod 19 is displaced and slid, the bent tension rope 21 is accommodated, thereby reducing the local stress of the tension rope 21 .

[0042] Reference Figure 12 A hook 25 is provided at the end of the tension rope 21, and a clamping hole is provided at the end of the arc groove 20, and the hook 25 is clamped in the clamping hole.

[0043] By providing a draw hook 25 for fixing the two ends of the tension rope 21 , the tension of the tension rope 21 acts on the two parallel sides of the support plate 16 .

[0044] Reference Figures 6-7The pressing rod 22 is provided with an annular engaging cavity 26 at the position where it penetrates the pressing ring 4. The cavity adopts an embedded structure design and forms 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 ratchet bar 27 made of medical grade stainless steel. Its teeth are gradually inclined at an angle, forming a precise meshing structure with the latch teeth 28 symmetrically distributed on the upper side of the pressing rod 22. These latch teeth 28 are made of elastic memory alloy material, and the tooth tips are passivated, which can not only ensure the one-way locking performance with the ratchet bar 27, but also avoid the loss of the instrument caused by hard friction.

[0045] The lower wall of the locking cavity 26 is provided with a U-shaped spring piece 29 assembly. The spring piece 29 is made of a titanium-nickel alloy plate through precision stamping and has excellent elastic recovery characteristics. The upper surface of the spring piece 29 maintains a dynamic contact state with the outer wall of the pressing rod 22. By continuously applying an upward thrust, the second latching tooth 28 and the second ratchet bar 27 are always closely engaged. When the operator presses the pressing rod 22 downward, the spring piece 29 is squeezed and deformed, and the second latching tooth 28 slides along the tooth groove inclined surface of the second ratchet bar 27. At this time, the meshing state is released, and the pressing rod 22 can be freely reset upward.

[0046] This one-way locking mechanism achieves stable maintenance of the deformation state of the support plate 16. When the tension 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 unlock, it is only necessary to apply downward pressure, and the elastic deformation of the spring piece 29 and the inclined surface guidance of the ratchet can make the pressing rod 22 smoothly reset, driving the support plate 16 to restore the 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, avoiding the risk of tissue irritation caused by instrument rebound.

[0047] Reference Figure 11 The arc groove 20 is arranged obliquely along the outer wall of the support plate 16 .

[0048] By tilting the outer wall of the support plate 16 , the bending angle of the tension rope 21 is reduced when the sliding rod 19 is pushed, thereby reducing the resistance of pushing the sliding rod 19 and reducing the tensile stress at the bending portion of the tension rope 21 .

[0049] 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.

[0050] 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 mouth 5 is unfolded, and the lower expansion mouth 2 is naturally unfolded by its own elasticity after losing the restriction of the upper expansion mouth 5.

[0051] The remaining structure is the same as that of Embodiment 1.

[0052] During use, before insertion, the upper dilator 5 is in an open ring shape, and the lower dilator 2 is curled so that it fits against the inner wall of the upper dilator 5. At this time, the hook 9 is engaged in the slot 10. The upper dilator 5 and the lower dilator 2 together form a cylinder with a smaller diameter. Lubricant is applied to the outside of the cylinder, and the cylinder of the lower dilator 2 covered by the upper dilator 5 is slowly sent into the vagina. After complete insertion, the pressing rod 22 is pushed. The pressing rod 22 pushes the sliding rod 19 to slide in the sliding groove 18. During the sliding of the sliding rod 19, the sliding rod 19 pulls the tensioning rope 21 passing through the through hole 24 to be retracted in the rope groove 23. At this time, the tensioning rope 21 is tensioned. The tensioned tensioning rope 21 closes the multiple V-shaped bending grooves 17 on the outer wall of the support plate 16, realizing the change in the arc of the support plate 16, and further causing the upper dilator 5 to slowly unfold into an arc shape. At this time, the hook 9 disengages from the slot 10, and the lower dilator 2 naturally unfolds using its own elasticity after losing the restriction of the upper dilator 5, realizing the unfolding of the upper and lower dilators 2 after insertion. Then, the pressing ring 4 is pressed to make the pressing ring 4 rotate close to the handle 1, and the upper dilator 5 and the lower dilator 2 rotate and unfold along the hinge rod 3 to expand the vagina. Finally, the vaginal wall and the cervix are examined through the endoscope 12.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A visible vaginal speculum, comprising a handle (1), characterized in that: A lower expansion nozzle (2) is connected to the handle (1), 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 latching tooth (8) is provided on the inner wall of the pressing ring (4), and the ratchet bar (7) is meshed with the latching tooth (8); The upper expansion nozzle (5) and the lower expansion nozzle (2) are both made of elastic material and are capable of radial bending. 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 a 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, with the upper expansion nozzle (5) covering the outer side of the lower expansion nozzle (2).

2. The visual vaginal dilator according to claim 1, characterized in that: An endoscope (11) is tightly arranged on the inner wall of the handle (1), an endoscope (12) is arranged inside 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, wherein: 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, wherein: 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) comprises 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 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).

5. The visual vaginal dilator according to claim 4, wherein: The cross section of the sliding rod (19) is an I-shaped one, and rope grooves (23) for accommodating the tension rope (21) are arranged on both sides of the sliding rod (19). A plurality of through holes (24) for the tension rope (21) to pass through are provided on the sliding rod (19).

6. The visual vaginal dilator according to claim 4, wherein: The end of the tension rope (21) is provided with a draw hook (25), and the end of the arc-shaped groove (20) is provided with a clamping hole, and the draw hook (25) is clamped in the clamping hole.

7. The visual vaginal dilator according to claim 4, wherein: The pressing rod (22) is provided with a locking cavity (26) at the position where the pressing ring (4) passes through, the upper wall of the locking cavity (26) is provided with a second ratchet bar (27), the upper side of the pressing rod (22) is provided with a second locking tooth (28), the second locking tooth (28) is meshed with the second ratchet bar (27), and the lower wall of the locking cavity (26) is provided with a spring sheet (29), which abuts against the pressing rod (22).

8. The visual vaginal dilator according to claim 4, wherein: The arc-shaped groove (20) is arranged obliquely along the outer wall of the support plate (16).

9. The visual vaginal dilator according to claim 4, wherein: In the natural state, the upper expansion nozzle (5) remains in a bent state, and the lower expansion nozzle (2) remains in an unfolded state.

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