CN212546898U

CN212546898U - Disposable medical vaginal dilator

Info

Publication number: CN212546898U
Application number: CN202020421445.8U
Authority: CN
Inventors: 王梅兰; 杨庆军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-28
Filing date: 2020-03-28
Publication date: 2021-02-19
Anticipated expiration: 2030-03-28

Abstract

The utility model relates to the field of medical instruments, in particular to a disposable medical vaginal dilator, which comprises an upper dilating wing, a lower dilating wing and a bow part connecting one corner of the rear ends of the upper dilating wing and the lower dilating wing; a threaded sleeve is fixed outside the bow part, and a screw rod is arranged in the threaded sleeve; a threading ring is fixed on the inner side of the front end of the upper expansion wing, and a threading hole is formed on the bent part; the inner side of the front end of the lower expansion wing is connected with the front end of the traction wire; the tail end of the traction wire passes through the threading ring and the threading hole and is connected with the front end of the screw rod; the opening state of the upper expansion wing and the lower expansion wing can be adjusted by rotating the screw rod through the traction wire. The disposable medical vaginal dilator has simple structure, easy manufacture and low cost, and is extremely suitable for disposable use; it can obtain a wide surgical field in clinical use, and can reduce the obstruction to clinical diagnosis and treatment operations; the expansion tension degree of the disposable medical vaginal dilator tends to be balanced and adjustable, the applicability is good, the adjustment is convenient and fast, the time and the labor are saved, and the disposable medical vaginal dilator has wide application prospect clinically.

Description

Disposable medical vaginal dilator

Technical Field

The utility model relates to a medical appliance, in particular to a medical vaginal dilator suitable for disposable use.

Background

A vaginal dilator, also known as a vaginal dilator, is commonly used in the routine examination and surgical treatment of gynecological diseases to dilate the vagina to obtain a better examination or surgical field, which is one of the more commonly used medical instruments in gynecology. The currently used vaginal dilator generally comprises an upper dilating wing, a lower dilating wing, a handle, a locking mechanism and the like, wherein the rear ends of the upper dilating wing and the lower dilating wing are hinged, the handle is respectively arranged at the tail ends of the upper dilating wing and the lower dilating wing for adjusting the opening angles of the upper dilating wing and the lower dilating wing, and the locking mechanism is used for locking the relative positions of the upper dilating wing and the lower dilating wing to maintain the expected dilating degree. The conventional vaginal dilator has a complex structure and high processing difficulty, is usually made of high-quality medical plastic with high strength, has high manufacturing cost, can greatly increase the diagnosis and treatment cost of diseases when used as a disposable medical instrument, and can cause serious data waste after being discarded. In addition, because the upper dilating wing and the lower dilating wing are hinged at the two sides of the rear end, the opening at the rear end of the vaginal dilator is closed-loop, which affects the openness of the surgical field, and the hinged part often causes certain obstruction to the operation of the instrument and the sight of the doctor, which affects the diagnosis and treatment effect and efficiency.

SUMMERY OF THE UTILITY MODEL

The technical purpose of the utility model is to provide a disposable medical vaginal dilator with simple structure, low cost, wider surgical field in clinical use, capability of reducing the obstruction to diagnosis and treatment operation, safety and sanitation.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

the utility model provides a disposable medical external genitals that expands, its includes and is used for carrying out the last expansion wing and the lower expansion wing that expand to the vagina, goes up the expansion wing and expands the wing shape unanimously with lower, all is curved surface form and by preceding back width crescent, its characterized in that: two corners of the rear ends of the upper expansion wing and the lower expansion wing, which are positioned on the same side, are connected through a bent part, so that the upper expansion wing and the lower expansion wing are distributed in a duckbill shape under the support of the bent part and are in an open state, and the bent part is positioned at the lateral rear parts of the upper expansion wing and the lower expansion wing and is of an integrated structure; a threaded sleeve is fixed outside the bent bow part through a support, a screw rod is arranged in the threaded sleeve, and a rotary handle is arranged at the rear end of the screw rod; a threading ring is fixed on the inner side of the front end of the upper expansion wing, and a threading hole is formed at one end of the bent part connected with the upper expansion wing; the inner side of the front end of the lower expansion wing is fixedly connected with the front end of a traction wire; the tail end of the traction wire penetrates through the threading ring, then extends backwards along the inner side of the upper expansion wing, and finally extends to the outside of the bow part through the threading hole and then is connected with the front end of the screw rod; the screw rod is rotated to move backwards, the front ends of the upper expansion wing and the lower expansion wing are drawn by the traction line and are drawn close based on the elastic bending of the bent part, and finally the front ends of the upper expansion wing and the lower expansion wing are drawn close to a buckling state; the screw rod is rotated to move forwards, the front ends of the upper expansion wing and the lower expansion wing are driven by the bent bow part to be gradually far away by utilizing elastic potential energy, and finally the bent bow part is reset to be in an opening state.

The working principle and the using method of the disposable medical vaginal dilator are as follows:

when the traction device is used clinically, firstly, the rotating handle is rotated to enable the screw rod to pull the traction wire to move backwards, the front ends of the upper expansion wing and the lower expansion wing drive the bent part to elastically bend and draw close to the middle under the traction action of the traction wire, and finally the front ends of the upper expansion wing and the lower expansion wing draw close to a buckling state; after the rotation of the rotary handle is stopped, the screw rod and the threaded sleeve provide stable support for the tail end of the traction wire based on self-locking characteristics, and the traction wire is in a tightening state, so that the upper expansion wing and the lower expansion wing are kept in a buckling state, and the upper expansion wing and the lower expansion wing can be safely and smoothly placed into a patient; after the vaginal dilator is placed at a proper position, the screw rod is moved forwards by rotating the rotary handle, the bent bow part drives the upper dilating wings and the lower dilating wings to gradually open by utilizing the accumulated elastic potential energy of the bent bow part, meanwhile, the traction wire is forced to move forwards, after the vaginal dilation degree reaches an ideal state, the rotary handle is stopped rotating, the traction wire is in a tightening state, so that the upper dilating wings and the lower dilating wings maintain the current opening angle, the vaginal dilation degree is kept constant, and then, corresponding clinical diagnosis and treatment operations can be carried out; after the clinical diagnosis and treatment operation is finished, the front ends of the upper expansion wing and the lower expansion wing are closed to a buckling state by the mode of rotating the rotary handle again, and finally the upper expansion wing and the lower expansion wing can be safely and smoothly taken out from the body of the patient.

Furthermore, when the disposable medical vaginal dilator is in an initial state, the screw rod is positioned at the rear end of the stroke, and the traction wire is in a tightening state, so that the front ends of the upper dilating wing and the lower dilating wing are kept in a buckling state.

Further, in the disposable medical vaginal dilator, the pull wire is a nylon wire.

Furthermore, in the disposable medical vaginal dilator, a plurality of guide rings for guiding the trend of the traction line are arranged on the inner side wall of the upper dilating wing.

Further, in the disposable medical vaginal dilator, the upper dilating wing, the lower dilating wing and the bow part are formed by cutting and shaping a same plane plate.

Further, in the disposable medical vaginal dilator, the upper dilating wing, the lower dilating wing and the bow part are formed by shaping a plate material on the same plane and then cutting the plate material.

Compared with the prior art, the disposable medical vaginal dilator has the following technical effects:

the disposable medical vaginal dilator has a very simple structure, the main body part can be integrally formed, the manufacture is easy, the required manufacturing materials are less, the price is lower than that of the conventional vaginal dilator, the disposable medical vaginal dilator is very suitable for disposable use, and the sterility and sanitation of clinical operation are favorably ensured; because the rear ends of the upper expansion wing and the lower expansion wing are not provided with hinged parts, and the bending part is not positioned right behind the upper expansion wing and the lower expansion wing, the disposable medical vaginal dilator can obtain a wider surgical field in clinical use, thereby improving the operation or examination effect; the upper expansion wing and the lower expansion wing in the disposable medical vaginal dilator are consistent in structure and do not have real upper and lower parts, the upper and lower positions of the upper expansion wing and the lower expansion wing can be flexibly adjusted according to clinical actual requirements in clinical use, so that the bent arch part does not hinder clinical operation, and particularly in local operations such as wart body and polyp removal, after the position of the bent arch part is reasonably adjusted, the focus part on one side of the vaginal wall is more fully exposed, and observation or operation is more facilitated; when the disposable medical vaginal dilator is used clinically, the bows provide expansion power, the expansion force degree tends to be balanced, when the upper expansion wings and the lower expansion wings are expanded to a certain angle, the expansion cannot be continued, compared with the conventional vaginal dilator which provides the expansion force manually, the disposable medical vaginal dilator is safer, and the injury to patients caused by over expansion can be avoided; this disposable medical external genitals that expands possesses expansion degree regulatory function, can be applicable to the great different patients of individuality difference, satisfies different clinical operation demands, because expansion degree carries out regulation and control through the mode of rotatory swing handle, convenient and fast, labour saving and time saving.

Drawings

Fig. 1 is one of the structural schematic diagrams of a disposable medical vaginal dilator.

Fig. 2 is a second schematic structural view of the disposable medical vaginal dilator.

Fig. 3 is a schematic view of the principle of adjusting the opened state of the upper and lower expansion wings by rotating the screw.

Fig. 4 is a schematic view showing a state where the front ends of the upper and lower extending wings are engaged with each other.

Fig. 5 is a schematic view showing the state in which the upper and lower dilating wings perform vaginal dilation.

Fig. 6 is a schematic structural view of the upper expansion wing with the guide ring added.

Fig. 7 is a schematic structural view of the screw and the traction wire being connected in a relatively rotatable manner.

In the figure, 1, a traction line, 2, a lower expansion wing, 3, a threading hole, 4, a bent arch part, 5, a support, 6, a rotating handle, 7, a threaded sleeve, 8, a screw rod, 9, an upper expansion wing, 10, a threading ring, 11, a guide ring, 12, an end cap, 13, an end hole, 14 and a rotating body.

Detailed Description

Referring to fig. 1-5, the utility model discloses a disposable medical vaginal dilator, which comprises an upper dilating wing 9 and a lower dilating wing 2, wherein the upper dilating wing 9 and the lower dilating wing 2 are identical in shape, both are curved and gradually increase in width from front to back, and are matched to dilate vagina; two corners of the rear ends of the upper expansion wing 9 and the lower expansion wing 2, which are positioned on the same side, are connected through a bent part 4, the upper expansion wing 9 and the lower expansion wing 2 are distributed up and down in a duckbill shape under the support of the bent part 4, and the upper expansion wing 9 and the lower expansion wing 2 are in an open state when the upper expansion wing 9, the lower expansion wing 2 and the bent part 4 are not subjected to external force; the bent part 4 is positioned at the lateral rear part of the upper expansion wing 9 and the lower expansion wing 2 and is of an integrated structure, namely the bent part 4, the upper expansion wing 9 and the lower expansion wing 2 can be integrally formed during manufacturing; a threaded sleeve 7 is fixed outside the bent bow part 4 through a support 5, a screw 8 in threaded fit with the threaded sleeve 7 is arranged in the threaded sleeve 7 in a penetrating manner, a rotating handle 6 is arranged at the rear end of the screw 8, and the screw 8 can be manually driven to rotate by utilizing the rotating handle 6 so as to adjust the front and rear positions of the screw 8; a ring-shaped threading ring 10 is fixed on the inner side of the front end of the upper expansion wing 9, and a threading hole 3 for threading the inner side and the outer side is formed at one end of the curved bow part 4 connected with the upper expansion wing 9; the inner side of the front end of the lower expansion wing 2 is fixedly connected with the front end of a traction wire 1; the tail end of the traction wire 1 penetrates through the threading ring 10 from front to back, then extends backwards along the inner side of the upper expansion wing 9, and finally extends to the outside of the bow part 4 through the threading hole 3 and then is connected with the front end of the screw rod 8; the screw 8 moves backwards by manually rotating the rotating handle 6, the tail end of the traction wire 1 moves backwards synchronously along with the screw 8, the front ends of the upper expansion wing 9 and the lower expansion wing 2 are drawn together under the traction of the traction wire 1, and finally the front ends of the upper expansion wing 9 and the lower expansion wing 2 are drawn together to be in a buckling state; because the upper expansion wing 9 and the lower expansion wing 2 adopt the curved surface structure, the strength is high and the deformation is not easy, thereby ensuring that the front ends of the upper expansion wing 9 and the lower expansion wing 2 are closed based on the elastic bending of the bending part 4; the screw rod 8 moves forwards by manually rotating the rotary handle 6, and the front ends of the upper expansion wing 9 and the lower expansion wing 2 are driven to be gradually far away by the bent bow part 4 by utilizing elastic potential energy along with the loosening of the traction wire 1, and finally reset to an open state; when the rotating handle 6 is not driven to rotate by external force, the screw 8 and the thread sleeve 7 can provide stable fixing action for the tail end of the traction wire 1 by utilizing self-locking characteristic.

referring to fig. 3 and 4, in clinical use, firstly, the rotary handle 6 is rotated to enable the screw 8 to move backwards, the tail end of the traction wire 1 moves backwards synchronously along with the screw 8, the front ends of the upper expansion wing 9 and the lower expansion wing 2 drive the bent part 4 to elastically bend and approach to the middle under the traction action of the traction wire 1, and finally the front ends of the upper expansion wing 9 and the lower expansion wing 2 approach to a buckling state; after the rotation of the rotary handle 6 is stopped, the screw 8 and the threaded sleeve 7 provide stable support for the tail end of the traction wire 1 based on self-locking characteristics, so that the traction wire 1 is kept in a tightening state, and the upper expansion wing 9 and the lower expansion wing 2 are kept in a buckling state, so that the upper expansion wing 9 and the lower expansion wing 2 can be safely and smoothly placed into a patient; referring to fig. 3 and 5, after the vaginal dilator is placed in a proper position, the rotating handle 6 is rotated to move the screw 8 forward, the curved bow 4 drives the front ends of the upper dilating wing 9 and the lower dilating wing 2 to gradually move away by using the elastic potential energy accumulated in the curved bow along with the loosening of the traction wire 1, meanwhile, the traction wire 1 is forced to move forward, after the vaginal dilation degree reaches an ideal state, the rotating handle 6 is stopped, the traction wire 1 is in a tightening state, so that the upper dilating wing 9 and the lower dilating wing 2 maintain the current opening angle, the vaginal dilation degree is kept constant, and then, corresponding clinical diagnosis and treatment operations can be performed; after the clinical diagnosis and treatment operation is finished, the front ends of the upper expansion wing 9 and the lower expansion wing 2 are closed to a buckling state by the mode of rotating the rotary handle 6 again, and finally the upper expansion wing 9 and the lower expansion wing 2 can be safely and smoothly taken out from the body of the patient.

Referring to fig. 1 and 2, the disposable medical vaginal dilator has a very simple structure, the main body part consisting of the upper dilating wing 9, the lower dilating wing 2 and the curved bow part 4 is integrally formed, the manufacture is very easy, the required manufacturing materials are less, the price is lower than that of the conventional vaginal dilator, and the disposable vaginal dilator is very suitable for disposable use and is beneficial to ensuring the sterility and sanitation in clinical use.

Referring to fig. 5, in clinical use, because there is no hinge part at the rear ends of the upper and lower dilating

wings

9 and 2 and the bow part 4 is not located right behind the upper and lower dilating

wings

9 and 2, the disposable medical vaginal dilator can obtain a wider surgical field in clinical use, thereby improving the surgical or examination effect.

Referring to fig. 5, the upper dilating wing 9 and the lower dilating wing 2 of the disposable medical vaginal dilator have the same structure and do not have the real upper and lower parts, and the upper and lower positions of the upper dilating wing 9 and the lower dilating wing 2 can be flexibly changed according to the clinical practical requirements in clinical use, so that the position of the arcus 4 does not obstruct the clinical operation, and particularly, in local operations such as wart and polyp removal, after the position of the arcus 4 is reasonably adjusted, the focus part on one side of the vaginal wall can be more fully exposed, thereby being more beneficial to observation or operation.

Referring to fig. 3 and 5, when the disposable medical vaginal dilator is clinically used, the arch part 4 provides expansion power, the expansion tension degree tends to be balanced, when the upper expansion wing 9 and the lower expansion wing 2 are expanded to a certain angle, the expansion cannot be continued, compared with the conventional vaginal dilator which manually provides expansion power, the disposable medical vaginal dilator is safer, and the injury to a patient caused by over-expansion can be avoided.

Referring to fig. 3, the disposable medical vaginal dilator has the function of adjusting the dilation degree, can be suitable for different patients with large individual difference, and meets different clinical operation requirements; meanwhile, the expansion degree is adjusted and controlled in a mode of rotating the rotating handle 6, so that the operation is more convenient and quicker, and the time and the labor are saved.

Referring to fig. 1 and 2, in the disposable medical vaginal dilator, the upper dilating wing 9, the lower dilating wing 2 and the curved bow 4 are integrally formed, and the three are processed in various manners, preferably as follows:

firstly, the upper expansion wing 9, the lower expansion wing 2 and the bow part 4 are formed by cutting a same plane plate and shaping; specifically, a plane blank is cut on a plane plate, the plane blank comprises plane parts respectively corresponding to the upper expansion wing 9, the lower expansion wing 2 and the bent bow part 4, and each plane part is shaped by adopting conventional processes such as mould pressing, hot bending and the like, so that the upper expansion wing 9, the lower expansion wing 2 and the bent bow part 4 are finally formed and keep the three in expected position relation;

the second is that the upper expansion wing 9, the lower expansion wing 2 and the bow part 4 are formed by shaping a same plane plate and then cutting; specifically, a flat plate is selected and subjected to shaping treatment by conventional processes such as die pressing, hot bending and the like to form a curved blank, the curved blank comprises curved parts corresponding to the upper expansion wing 9, the lower expansion wing 2 and the bent bow part 4 respectively, redundant leftover materials are cut off, and finally the upper expansion wing 9, the lower expansion wing 2 and the bent bow part 4 are formed and keep the expected position relationship among the three.

Referring to fig. 1, 2 and 3, in the disposable medical vaginal dilator, the upper dilating wing 9, the lower dilating wing 2 and the curved bow 4 are made of the same elastic material; therefore, the processing and the manufacturing are more facilitated, although the upper expansion wing 9 and the lower expansion wing 2 are both made of elastic materials, the upper expansion wing 9 and the lower expansion wing 2 are of curved surface structures, the whole body has higher strength and is not easy to deform, so that the change of the opening state of the upper expansion wing 9 and the lower expansion wing 2 is completely from the elastic deformation of the bent arch part 4, and therefore, in the process of expanding the vagina, the upper expansion wing 9 and the lower expansion wing 2 can keep a specific shape to be matched with the physiological structure of the vagina, and the uniform and balanced expansion force applied to the inner wall of the vagina is ensured; in addition, in order to ensure that the bending part 4 has larger elasticity, when the disposable medical vaginal dilator is implemented, the bending part 4 can adopt a thickened design, and reinforcing ribs can also be arranged on the bending part 4, so that the elastic performance of the bending part 4 can ensure that the upper expansion wing 9 and the lower expansion wing 2 can realize the expected expansion effect.

Referring to fig. 5, in clinical use of the disposable medical vaginal dilator, although the portion of the traction wire 1 located in front of the threading ring 10 extends between the front ends of the upper and lower dilating

wings

9 and 2, the traction wire 1 is located forward, and the traction wire 1 can be a thin rope, so the traction wire 1 in front of the threading ring 10 generally does not interfere with the conventional clinical operation; meanwhile, when the disposable medical vaginal dilator is implemented, the relative positions of the threading ring 10 and the threading hole 3 are reasonably adjusted, so that the traction line 1 part between the threading ring 10 and the threading hole 3 and the inner wall of the upper dilating wing 9 tend to be attached to each other, and the clinical operation is prevented from being hindered; in addition, because the traction line 1 is always positioned at the inner side of the upper expansion wing 9 before being led out from the threading hole 3, the traction line 1 can not be contacted with a patient in the process of implementing vaginal expansion, thereby avoiding the patient from being scratched in the process of drawing the traction line 1; to sum up, the setting of pull wire 1 can not produce adverse effect to this disposable medical vaginal dilator in clinical in-service use effect, and this disposable medical vaginal dilator can be applicable to multiple clinical operations such as cervical inspection, vagina general examination, vagina dosing and sample, has wide application prospect clinically.

Further, referring to fig. 6, in order to make the portion of the traction wire 1 located between the threading ring 10 and the threading hole 3 more closely contact with the inner wall of the upper expansion wing 9, a plurality of guide rings 11 for guiding the traction wire 1 are disposed on the inner side wall of the upper expansion wing 9.

Referring to fig. 4, when the disposable medical vaginal dilator is clinically used, the front ends of the upper expansion wing 9 and the lower expansion wing 2 need to be adjusted to the buckling state before being placed into the vagina of a patient, in order to ensure that the use and operation of the disposable medical vaginal dilator are more efficient and convenient in clinic, the product state after the disposable medical vaginal dilator is processed is that, in the initial state, the screw 8 is located at the rear end of the stroke, the traction wire 1 is in the tightening state, so that the front ends of the upper expansion wing 9 and the lower expansion wing 2 are kept buckled, and therefore, the state of the disposable medical vaginal dilator does not need to be adjusted in advance by a user before being placed into the vagina of the patient.

Referring to fig. 3, 4 and 5, in the disposable medical vaginal dilator, the arrangement of the threaded sleeve 7 and the threaded rod 8 is ingenious and reasonable, on one hand, the adjustment operation of the opening states of the upper expansion wing 9 and the lower expansion wing 2 is very convenient and fast, and is easy to operate, on the other hand, the threaded sleeve 7 and the threaded rod 8 form a screw rod mechanism, and the self-locking characteristic is provided, so that a stable fixing effect can be provided for the tail end of the traction wire 1, and in addition, the threaded sleeve 7 and the threaded rod 8 are very simple in structure, can be made of plastics, and are easy to implement. When the disposable medical vaginal dilator is implemented, the connection mode of the threaded sleeve 7, the support 5 and the bow part 4 preferably adopts an integrated structure, a part is reserved on one side of the bow part 4 when the bow part 4 is manufactured, and the part is processed and shaped to form the threaded sleeve 7 and the support 5; the screw sleeve 7 can be formed into a cylindrical shape by curling, and then a thread is processed on the inner wall of the screw sleeve; this makes the production of the screw sleeve 7 and the support 5 easier and at the same time makes the connection of the screw sleeve 7, the support 5 and the bow 4 more secure.

Referring to fig. 5, in the disposable medical vaginal speculum, the smaller the diameter of the pull wire 1, the less it will interfere with the clinical procedure, and therefore, the pull wire 1 should be a thin wire with high strength, preferably a nylon wire.

Referring to fig. 5, in the disposable medical vaginal dilator, the upper dilating wing 9, the lower dilating wing 2 and the curved bow 4 are preferably made of transparent plastic materials, thereby ensuring a more sufficient surgical field in clinical use.

Referring to fig. 3, in the disposable medical vaginal dilator, the opening states of the upper dilating wing 9 and the lower dilating wing 2 are adjusted by rotating the screw 8, if the front end of the screw 8 is fixedly connected with the tail end of the traction wire 1, the screw 8 inevitably drives the tail end of the traction wire 1 to rotate correspondingly in the rotating process, and even if so, the adjusting effect of the opening states of the upper dilating wing 9 and the lower dilating wing 2 is not substantially affected.

Meanwhile, referring to fig. 7, in order to stabilize the operation of the traction wire 1, the adjustment of the opening state of the upper expansion wing 9 and the lower expansion wing 2 is more accurate, the front end of the screw 8 and the tail end of the traction wire 1 can also be connected in a relatively rotating manner, and the specific structure is as follows:

the front end of the screw 8 is fixedly connected with a hollow end cap 12, and the front end of the end cap 12 is provided with an end hole 13; the end cap 12 is internally provided with a rotating body 14 which can rotate in the end cap but can not be removed from the end cap, and the tail end of the traction wire 1 passes through the end hole 13 and is fixedly connected with the rotating body 14; therefore, the tail end of the traction wire 1 can not synchronously rotate along with the screw 8 in the rotating process.

Claims

1. The utility model provides a disposable medical external genitals that expands, its includes and is used for carrying out the last expansion wing and the lower expansion wing that expand to the vagina, goes up the expansion wing and expands the wing shape unanimously with lower, all is curved surface form and by preceding back width crescent, its characterized in that: two corners of the rear ends of the upper expansion wing and the lower expansion wing, which are positioned on the same side, are connected through a bent part, so that the upper expansion wing and the lower expansion wing are distributed in a duckbill shape under the support of the bent part and are in an open state, and the bent part is positioned at the lateral rear parts of the upper expansion wing and the lower expansion wing and is of an integrated structure; a threaded sleeve is fixed outside the bent bow part through a support, a screw rod is arranged in the threaded sleeve, and a rotary handle is arranged at the rear end of the screw rod; a threading ring is fixed on the inner side of the front end of the upper expansion wing, and a threading hole is formed at one end of the bent part connected with the upper expansion wing; the inner side of the front end of the lower expansion wing is fixedly connected with the front end of a traction wire; the tail end of the traction wire penetrates through the threading ring, then extends backwards along the inner side of the upper expansion wing, and finally extends to the outside of the bow part through the threading hole and then is connected with the front end of the screw rod; the screw rod is rotated to move backwards, the front ends of the upper expansion wing and the lower expansion wing are drawn by the traction line and are drawn close based on the elastic bending of the bent part, and finally the front ends of the upper expansion wing and the lower expansion wing are drawn close to a buckling state; the screw rod is rotated to move forwards, the front ends of the upper expansion wing and the lower expansion wing are driven by the bent bow part to be gradually far away by utilizing elastic potential energy, and finally the bent bow part is reset to be in an opening state.

2. The disposable medical vaginal dilator of claim 1, wherein: the upper expanding wing, the lower expanding wing and the bent bow part are formed by cutting a plate material on the same plane and shaping.

3. The disposable medical vaginal dilator of claim 1, wherein: the upper expansion wing, the lower expansion wing and the bent bow part are formed by shaping a plate material on the same plane and then cutting the plate material.

4. The disposable medical vaginal dilator of claim 1, wherein: and a plurality of guide rings for guiding the trend of the traction line are arranged on the inner side wall of the upper expansion wing.

5. The disposable medical vaginal dilator of claim 1, wherein: in the initial state, the screw rod is positioned at the rear end of the stroke, and the traction wire is in a tightening state, so that the front ends of the upper expansion wing and the lower expansion wing are kept in a buckling state.

6. The disposable medical vaginal dilator of claim 1, wherein: the traction line is a nylon line.