Vaginal dilators for cervical examination and surgery

Abstract

A vaginal dilator for cervical examination and surgery includes an upper dilator and a lower dilator. The upper dilator includes an upper wing and a handle that is integral with the upper wing and extends downward along one side of the upper wing at an obtuse angle thereto. The lower dilator includes a lower wing and a handle that is integral with the lower wing and extends downward along one side of the lower wing at an approximately right angle thereto. Both sides of the rear ends of the upper and lower wings are connected to the shaft hole through shaft pins. The handle and the handle are positioned by a first expansion positioning device and upper and lower attached wings that are respectively accommodated on the inner side surfaces of the upper and lower wings. The invention is characterized in that it also includes a second expansion positioning device composed of a positioning connector and a side dilator meshed with gears, and an instant-destruct strip is provided on the handle. The invention has a simple structure, is easy to operate, is easy to manufacture, is economical and practical, and is safe and effective to use.

Description

Technical Field

[0001] The invention relates to a vaginal dilator of gynecological and obstetric medical equipment, in particular to a vaginal dilator for cervical examination and surgery. Background Art

[0002] Vaginal dilator, also known as vaginal speculum, speculum, etc., is a commonly used gynecological examination and surgical instrument. It is used to expose the examination site or surgical site. Through domestic and foreign literature retrieval, the U.S. Patent Office recorded the spiral-fixed structure vaginal dilator invented by American John L. Marco in 1949. A double-wing vaginal dilator for inspection has at least twelve parts, and a surgical type has at least eight parts. The advantage is that the upper and lower wings open at an angle greater than 40 degrees during expansion, which can effectively expand the vagina, expose the cervix and posterior fornix, and facilitate inspection and surgery. However, its defects are that there are many parts, the operation is cumbersome and time-consuming, the cost is high, and it is not suitable for disposable production. According to the records of the Chinese Patent Office, the "Vaginal Dilator" (the abbreviation of the double-wing vaginal dilator) invented by Lin Jing of Wenzhou Medical University in my country in 1989 has only two parts to form a vaginal dilator, whether it is an inspection type or a surgical type, and it has all the above advantages of the American invention in terms of function, and has the advantages of fewer parts, convenient operation, fast speed, low cost, and suitable for disposable production.

[0003] The double-wing vaginal dilator includes an upper wing and a lower wing that can be opened and closed in a duckbill shape. The upper and lower wings are kept open at a certain angle by the positioning device on the dilator. The doctor observes, examines and performs surgery through the field of vision of the upper and lower wings. With the emergence and increase of some new diseases in clinical practice, some patients with particularly obesity and loose vaginas and some patients who need to undergo ultra-high frequency radio wave knife (also known as LEEP knife) surgery in clinical practice will be encountered. When a double-wing vaginal dilator with only upper and lower wings is used, when the upper and lower wings are opened, the vaginal wall between the upper and lower wings will be backfilled into the opened area, thereby reducing the exposure range and bringing difficulties to the inspection or surgery. If the opening height of the upper and lower wings is increased, in addition to causing pain to the patient, the backfill will also increase, so this is not a good countermeasure. On the other hand, in the field of obstetrics and gynecology, due to the increasing number of cervical cancer patients in recent years, the use of ultra-high frequency radio wave knife will produce harmful smoke with a piercing throat and a burnt smell during surgery, affecting the health of doctors and patients, so a vaginal dilator with a smoke exhaust device is clinically needed.

[0004] Furthermore, with the continuous advancement of technology, more and more electronic products are used in medical devices, and vaginal dilators are also required to have functions such as lighting and video.

[0005] For example, U.S. Patent Number: 6,024,696 discloses a "sidewall supported speculum", i.e., a four-wing vaginal dilator, which has more than 20 parts, a complex structure, cumbersome and laborious operation, and a high cost. A four-wing speculum supported by a sidewall includes an upper expansion piece including an upper wing, a push handle and an upper grip, the upper grip is connected to the upper wing by a pin, the upper wing is also provided with a smoke exhaust setting device for placing a smoke exhaust pipe, and a lower expansion piece including a lower wing and a second grip, the grip and the second grip are fixed with screws and nuts, left and right expansion pieces are provided between the upper and lower wings, the rear parts of the left and right expansion pieces extend to the left and right to form a small wing for the left and right, and pins extend forward and backward on the small wings, the pins pass through the front and rear positioning grooves provided at the rear end of the lower wing, and there are also left and right mounting screw holes above the grip for installing spring pressing pieces to buckle the rear axons of the left and right expansion pieces to maintain the position of the left and right expansion pieces when they are upright. The defect is that such a complex structure cannot make the left and right expansion pieces expand outward, nor can it make the left and right expansion pieces retract inward! The only way for the left and right dilators to support the side wall of the vagina is to "lie down" or "stand upright". This will inevitably lead to a small surgical space, insufficient surgical field, and lack of practical value.

[0006] In addition, International Application PCT / AU98 / 00737 discloses a "spectacle", which proposes a solution as follows: a speculum includes a main body, which has two spreading fingers 14A, 14B whose proximal ends are connected to the main body, another spreading finger 28 extends between the above fingers and is fixed to the main body, an actuator is pivotally connected to the main body, the actuator is formed with a spreading finger 70 located between the fingers 14A, 14B and opposite to the fixed finger 28, when the actuator is pivoted, the finger immediately begins to rotate away from the remaining fingers, after the actuator rotates a certain angle, it begins to contact the inside of the fingers 14 near their proximal ends, so that the distal ends of those fingers move away from each other, the fingers 14A, 14B are hinged around the inclined hinge axis, so that when the actuator abuts them, they move in a combined upward and sideward motion. Its disadvantages are also that the structure is too complicated, there are too many parts, it is difficult to operate, and the side spreading pieces are arranged outside the upper and lower wings and cannot be retracted into the upper and lower wings, so it will cause pain to the patient when entering the vagina.

[0007] The above-mentioned four-wing speculum invented by Americans has many parts, even more than 20, which is cumbersome and heavy, inconvenient to operate, expensive, and has many defects. The four-wing speculum invented by our Chinese Lin Jing, Zhang Xingxing, etc. (the patent name is "Vaginal Dilator with Double Side Wings"), the Chinese invention patent authorization number is ZL201010227014.9, a four-wing speculum has only 4 parts in total (including an upper dilator, a lower dilator, a positioning sleeve and a pair of side dilators), with extremely few parts, simple operation, economical and practical, and excellent functions. No matter from which aspect, it is far superior to the four-wing speculum invented by Americans. In addition, a large amount of smoke will inevitably be generated during UHF radiofrequency knife surgery, which requires functions such as smoke exhaust and lighting. For this, Zhang Xingxing and Lin Jing from China first invented the "Vaginal Dilator with Upper and Lower Wings with Attached Wings". The Chinese invention patent authorization number is ZL201010227012.X. It is the first time in China and abroad to propose setting upper and lower attached wings on the inner surface of the upper and lower wings, which solves the problem of quickly removing toxic smoke from the area closest to the surgery during LEEP surgery, aiming to protect the health of medical staff and patients and eliminate pollution in the operating room, and can also realize functions such as lighting and video at the same time.

[0008] We have applied for the above two patents in the United States and Europe at the same time, and have been authorized by the United States Patent Office with patent number US 8,876,711 B2EP and by the European Patent Office with patent number EP 2 586 486 B1.

[0009] When the upper and lower wings are expanded, the opening angle of the upper and lower wings is greater than 40 degrees, and they can be retracted and closed. This is a safe and effective indicator of vaginal dilators. What lies before us is how to make the opening angle of the left and right wings greater than 40 degrees and retracted and closed when the left and right wings are expanded. This has been a long-standing problem, and it has finally been solved by us Chinese. With such a perfect structure, when in use, the four-wing vaginal dilator is put into and taken out of the vagina just like a double-wing vaginal dilator with only upper and lower wings. It is a very humanized design that reduces the pain of patients to a minimum. Compared with the four-wing vaginal dilator invented by foreigners, the advantages in all aspects are obvious.

[0010] So far, a common defect of four-wing vaginal dilators at home and abroad is that there is only one handle (or pipe joint) at the rear end of the left and right expansion plates but no second handle. In clinical operation, it is found that it is difficult to make the second positioning hook tilt up with only the first handle, so it is difficult to enter the second positioning buckle. Even if the second positioning hook is forced to enter the second positioning buckle, it is impossible to make the second positioning hook disengage from the positioning buckle and lose its practical value. Therefore, the second handle is added during the design of the present invention, and the result is completely different. By pinching the first handle and the second handle, the doctor can make the inner end of the side expansion plate gear under the second handle tilt up and easily engage or disengage with the positioning connection gear. It is easy to operate and easy to adjust. This is a fundamental change and improvement to the original defects of the known technology and has substantial significance and makes it practical.

[0011] On the other hand, the media reported that some lawless elements recycled and reused the products. For this reason, Chinese inventors Lin Jing and Zhang Xingxing first invented the "Instant-destructible Disposable Sterile Vaginal Dilator" in 2004 (the patent name is Instant-destructible Painless and Noiseless Disposable Vaginal Dilator, and the patent authorization number is 200420116743.7). The principle is to set an "instant-destruct belt" on the non-stress-bearing part of the dilator handle or the handle. After use, the "instant-destruct belt" is broken to achieve destruction and achieve the purpose of preventing reuse. However, in actual applications, if the "instant-destruct belt" is too deep, it is easy to break during transportation, and if the "instant-destruct belt" is too shallow, it is difficult to break.

[0012] Therefore, further research is needed on vaginal dilators to overcome their defects and create new specifications to make them better and more complete. Summary of the invention

[0013] The purpose of the present invention is to provide a vaginal dilator for cervical examination and surgery which can overcome the defects of the prior art and provide a new structure.

[0014] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a vaginal dilator for cervical examination and surgery, comprising an upper dilating piece and a lower dilating piece, the upper dilating piece comprising an upper wing, and a handle integral with the upper wing and extending downward along one side of the upper wing at an obtuse angle thereto, the lower dilating piece comprising a lower wing, and a handle integral with the lower wing and extending downward along one side of the lower wing at a direction nearly at a right angle thereto, the two sides of the rear ends of the upper wing and the lower wing being connected to the shaft hole through an axle pin, the handle and the handle being positioned by a first expansion positioning device and the upper and lower attached wings respectively accommodated on the inner side surfaces of the upper and lower wings, and also comprising a second expansion positioning device composed of a positioning connector and a side dilating piece meshed with gears, and an instant-destruction strip is provided on the handle;

[0015] The positioning connector has a radially inwardly extending positioning connector shaft pin on the inner side of the lower part, which is rotatably and detachably connected to the second shaft hole at the rear end of the upper wing. The positioning connector shaft pin is also provided on the outer side of the positioning connector shaft pin, which can receive the rotatable and detachable connection of the side expansion plate corner shaft pin. A positioning connector gear is also provided on the top of the positioning connector, which meshes with the side expansion plate gear.

[0016] The side expansion piece is one solid, and its rear end is a first handle, and the other is hollow, and its rear end is a pipe joint. The front inner side of the first handle or the pipe joint of the side expansion piece has a side expansion piece gear extending radially inward and having a second handle, and the front inner side of the gear has a side expansion piece corner axis pin extending radially inward and turning backward, and the front part of the corner axis pin is a side wing;

[0017] The pipe joint or the first handle and the second handle are kneaded toward each other to drive the free end of the side expansion piece gear to move upward above the positioning connector gear, so that the inner diameter spacing of the left and right wings opened horizontally outward reaches >88mm and is retracted inward between the upper and lower wings.

[0018] Preferably, the side expansion piece can be installed with a left expansion piece or a right expansion piece according to clinical needs, or both left and right expansion pieces can be installed at the same time; and the left and right expansion pieces can be additionally installed with an upper wing, or an additional lower wing, or both upper and lower wings can be additionally installed at the same time according to clinical needs.

[0019] Preferably, one end of the side expansion piece gear is fixedly connected to the side wing, and the other end is a free end, and the second handle is arranged on the free end.

[0020] Preferably, the expansion angle of the upper wing and the lower wing in the maximum expansion state is greater than 40°.

[0021] Preferably, the side expansion piece corner axis pin is connected through the axis hole of the positioning connector, and the axis pin of the positioning connector is connected and rotated with the second axis hole at the rear end of the upper wing. By turning the pipe joint, the side expansion piece and the positioning connector are driven to rotate in the second axis hole of the upper wing, thereby adjusting the upper and lower positions of the side wing.

[0022] Preferably, the upper expansion piece comprises: an upper wing, and a handle integral with the upper wing and extending backward along the rear end of one side of the upper wing, an axle pin is provided between the upper wing and the handle, and a second axle hole for receiving the axle pin of the positioning connector is provided in front of the axle pin;

[0023] Preferably, the lower expansion piece comprises: a lower wing, and a handle which is integral with the lower wing and extends downward from the rear end of the lower wing, and an axial hole is provided between the lower wing and the handle.

[0024] Preferably, the instant-destruction strip is connected to the handle at its front end through a tie and at its rear end through a material reduction groove, and its left and right sides are hollow windows. There is a small protrusion above the center of the instant-destruction strip that is higher than the plane of the handle.

[0025] Preferably, the position and size of the instant-destruction strip match the lower wing buckle, and when the lower wing buckle is pressed into the instant-destruction strip, the instant-destruction strip is immediately broken to form an instant-destruction hole, which is tightly fitted and fixed to the lower wing buckle.

[0026] Preferably, the lower wing has a channel, which consists of a channel body and a channel cover that fits closely therewith. The edge of the channel body has a groove for embedding the channel cover. The channel body is provided with at least one opening below its front end and on both sides. The channel cover has at least one opening facing the vagina. A lower wing buckle is provided below the lower wing near the tail, and the lower wing buckle is pressed into the instant-destructive hole on the handle to fix it. The rear end is a lower wing pipe joint.

[0027] Preferably, the upper attached wing has a channel, and the channel consists of a channel body and a channel cover that fits closely therewith. The edge of the channel body is provided with a groove for embedding the channel cover, and the channel cover has at least one opening facing the vagina. The rear end of the channel is an upper attached wing pipe joint, and an upper attached wing hook is provided in the front of the rear part of the upper attached wing near the top end. The upper attached wing hook is buckled into the limiting groove in the middle part of the rear end of the upper wing for detachable and rotatable fixation. By moving the upper attached wing pipe joint, the upper attached wing can be rotated to the left to the left edge of the upper wing or to the right to the right edge of the upper wing.

[0028] Preferably, the first expansion positioning device is composed of a positioning hook and a positioning buckle, there is at least one or more positioning hooks, and the positions of the positioning hook and the positioning buckle are interchangeable. When the positioning hook and the positioning buckle are engaged and expanded to the maximum gear, the opening angle of the upper and lower wings can be >40°.

[0029] Preferably, the first expansion positioning device includes a positioning plate with an arc-shaped groove on the handle and a pin shaft connecting the upper and lower wings as the rotation center, and a screw with a nut passing through the arc-shaped groove on the positioning plate is provided on the handle. When the nut and the screw are screwed together and expanded to the maximum gear, the upper and lower wings can open at an angle of >40°.

[0030] Preferably, the axle pin, the positioning connector axle pin and the side expansion piece corner axle pin are large at both ends and small in the middle, solid in the middle and lower parts and open in the middle and upper parts, the edge diameter of the open piece is larger than the open piece diameter, and the whole is dumbbell-shaped.

[0031] Preferably, the upper and lower attached wings are also suitable for other double-wing, triple-wing, quadruple-wing or multi-wing vaginal dilators.

[0032] When using the vaginal dilator of the above scheme of the present invention, the left and right wings are folded in a closed state between the upper and lower wings and inserted into the vagina, and the grip handle and the push handle are controlled to open the upper and lower wings to the desired field of view, and the field of view is maintained by the first expansion positioning device, and then the pipe joints or the first handle and the second handle at the rear end of the left and right wings are controlled in opposite directions, which can drive the side expansion piece gear to bend upward and move above the positioning connecting piece gear, so that the two side wings are opened until the desired field of view is engaged. At this time, the vagina, cervix and / or surgery can be observed and inspected through the expanded field of view of the upper and lower wings and the left and right wings.

[0033] When ultra-high frequency radiosurgery is required for the vagina or cervix, the smoke generated is discharged through the openings of the left and / or right expansion pieces and the upper / or lower wings, through the pipeline of the channel and connected to the negative pressure device at the rear end.

[0034] After the examination, treatment or operation, the second expansion positioning device of the meshing side expansion plate gear and the positioning sleeve gear can be loosened by pinching the tube joint and the second handle toward each other, and the left and right wings can be retracted into the upper and lower wings. Then the first expansion positioning device is unlocked, and the upper and lower wings are automatically closed and retracted, and the doctor can remove the expander from the vagina.

[0035] According to the vaginal dilator of the present invention, on the one hand, since the side dilating pieces, the upper and lower attached wings are all provided with channels, as long as the channel cover is opened, the entire channel is fully exposed, so that it is very convenient and very accurate to install a lighting device, such as an LED, at the opening of the left and / or right wings and / or the upper and / or lower attached wings, and its power supply line can pass through the channels of the fully exposed side wings under the direct sight of the operator to pass through the power supply, and after the installation is completed, the channel cover is closed; on the other hand, the length of the side wings, the upper and lower attached wings is similar to the length of the upper and lower wings, and directly reaches the upper and lower wing heads of the vaginal dilator, so that the deeper parts of the vagina can be operated under better lighting conditions, and all power supplies, power lines and equipment are placed in the channel, which not only improves the inspection and surgical conditions, but also is safe and reliable. With the same principle as above, because of the design of the channel cover, the vaginal dilator of the present invention can install a camera at the channel opening at the front end or inner side of the fully exposed left and / or right wings and / or the upper and / or lower attached wings, whether using wired or wireless transmission, it is possible to provide real-time images of the inspection site or surgical site. This can meet the current medical needs of providing real-time images, providing conditions for clinical diagnosis, and even remote consultation and teaching.

[0036] Because of the ingenious design of the channel cover, on the one hand, the channel cover can be opened to meet the needs of operators to accurately, conveniently and quickly install lighting or cameras under direct vision; and it can also meet the needs of smoke exhaust and blood water exhaust when the channel cover and the channel are sealed. On the other hand, such a long and curved side wing can be made of environmentally friendly materials, degradable materials or ordinary plastics to achieve demolding, thus achieving multiple goals at one stroke.

[0037] It is precisely because of the setting of the instant-destruction strip that the device is destroyed immediately after use and cannot be restored, thus achieving disposable use. This is of great significance for preventing cross-infection of iatrogenic diseases for surgical vaginal dilators used in ring-electrode cervical cancer and circumcision procedure for precancerous lesions (LEEP), which is of great significance.

[0038] The positioning connector is detachably connected to the rear end of the upper wing through the positioning connector shaft pin, and the positioning connector is detachably connected to the side expansion piece, so it is very convenient for tooling. It is completely possible to install a left expansion piece or a right expansion piece according to clinical needs, or install both the left and right pieces at the same time, or add an upper attached wing, or add a lower attached wing, or add upper and lower attached wings at the same time; similarly, the four-wing vaginal dilator with side expansion pieces without channels can be added with an upper attached wing, or a lower attached wing, or upper and lower attached wings at the same time. Conversely, if the positioning connector and the side expansion pieces are disassembled, it can become a surgical double-wing vaginal dilator, or an upper-attached-wing double-wing vaginal dilator, or a lower-attached-wing double-wing vaginal dilator, or a double-tube double-wing vaginal dilator. The present invention has great flexibility and adaptability.

[0039] Obviously, the instant-destructible four-wing vaginal dilator of the present invention overcomes the defects of the prior art, and the functions are greatly increased and improved. The instant-destructible four-wing vaginal dilator of the present invention not only has the upper and lower wings opening angle greater than 40 degrees! And the distance between the left and right wings can reach more than 88 mm!

[0040] The destructible four-wing vaginal dilator according to the present invention also has the advantages of simple structure, easy manufacture and low cost.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The present invention adds a new specification to obstetrics and gynecology medical instruments. It is the first domestic and foreign four-wing vaginal dilator with a brand-new structure composed of a positioning connector gear meshing with a side expansion piece gear. It has not only surgical type but also inspection type, not only four-wing double-tube type but also four-wing three-tube type and four-wing four-tube type, not only ordinary type but also instant-destructive type, with complete specifications and models, very clever design, very simple structure, cheap, good quality and practical.

[0043] 2. The newly designed positioning connector of the present invention is smaller and more exquisite than the positioning sleeve of the known technology, has a simple structure, does not require "core pulling" during production, has an economical mold, is easier and faster for workers to install, and is convenient and practical for clinical use.

[0044] 3. The present invention is provided with a second handle integrated with the side expansion piece gear above the side expansion piece gear, and a pipe joint or a first handle is provided at the rear end of the side expansion piece, which overcomes the defect of the known technology without a second handle. In the present invention, as long as the pipe joint or the first handle and the second handle are pinched toward each other, the side expansion piece gear will be tilted upward so that it can be suspended and moved above the positioning connector gear, and positioned according to clinical needs. When the condition and surgery or examination require it, the inner diameter spacing of the left and right wings opened horizontally outward can reach >88mm. After use, the left and right wings can be folded inward between the upper and lower wings.

[0045] 4. The detachable connection between the positioning connector and the upper wing and the detachable connection between the positioning connector and the side expansion piece of the present invention are ingeniously designed and bring extraordinary benefits. As far as the production of the four-wing dilator is concerned, firstly, after these parts are disassembled, the parts become simple, the production is very convenient, the mold cost is greatly saved, and the equipment investment is reduced; secondly, after the side expansion piece and the positioning connector are disassembled, the single product with the least parts is a surgical double-wing vaginal dilator with upper and lower wings. Installing the positioning connector and the side expansion piece makes it a four-wing vaginal dilator. Disassembly or assembly is extremely simple and convenient, and they can be assembled at will into different single products that can be used separately in clinical practice. From the production perspective and mold investment, they can share molds, thereby greatly saving mold investment.

[0046] 5. Another structure of the present invention only adds a self-destruct strip design on the handle to make an instant-destructible four-wing speculum. It is very simple but very clever and practical. After use, the doctor can destroy it with one press, and the destruction is clear at a glance. Everyone knows that the expander has been used, thereby preventing cross-infection of iatrogenic diseases and protecting people's health.

[0047] 6. It has few parts and low cost. It can be used not only for surgery but also for inspection. When smoke exhaust is required during surgery, it only needs to be connected to the smoke exhaust pipe on the pipe joint. If smoke exhaust is not required, there is no need to connect the smoke exhaust pipe. Therefore, in addition to the special inspection type, the surgical type can also be used for clinical inspection.

[0048] The above-mentioned purpose and other purposes and advantages of the vaginal dilator for cervical examination and surgery according to the present invention are further explained in combination with the following drawings and embodiments. The following drawings take the side dilator with channels as the basic example, and those without channels are marked. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1Schematic diagram of the initial state or the closed state after use of Embodiment 1 (side expansion piece without channel);

[0050] Figure 2 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40° in Example 1 (side expansion piece without channel);

[0051] Figure 3 Schematic diagram of embodiment 1 (side expansion piece without channel) with the left and right wings open at a distance of >88mm in the expanded state;

[0052] Figure 4 Schematic diagram of the upper expansion piece structure;

[0053] Figure 5 Schematic diagram of the structure of the lower expansion piece;

[0054] Figure 6 Schematic diagram of the positioning connector structure;

[0055] Figure 7 Schematic diagram of the structure of the side expansion piece (without channel);

[0056] Figure 8 Schematic diagram of the side expansion piece structure;

[0057] Fig. 9 Cross-sectional view of the connection between the positioning connector and the upper wing and the side expansion piece

[0058] Fig.10 Schematic diagram of the initial state or the closed state after use of embodiment 2;

[0059] Fig.11 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40°;

[0060] Fig.12 Schematic diagram of the left and right wings in the expanded state with a distance of >88mm;

[0061] Fig.13 A schematic diagram of the structure of the lower expansion piece with an instant-destruction strip;

[0062] Fig.14 Schematic diagram of the initial state or the closed state after use of embodiment 3;

[0063] Fig.15 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40°;

[0064] Fig.16 Schematic diagram of the left and right wings in the expanded state with a distance of >88mm;

[0065] Fig.17 Schematic diagram of the initial state or the closed state after use of embodiment 4;

[0066] Fig.18 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40°;

[0067] Fig.19 Schematic diagram of the left and right wings in the expanded state with a distance of >88mm;

[0068] Fig. 20 Schematic diagram of the upper wing structure;

[0069] Fig.21 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40°;

[0070] Fig. 22 Schematic diagram of the initial state or the closed state after use of embodiment 5;

[0071] Fig.23 Schematic diagram of the left and right wings in the expanded state of Example 5;

[0072] Fig.24 Schematic diagram of the lower wing structure;

[0073] Fig.25 Schematic diagram of the initial state or the closed state after use of Example 6;

[0074] Fig.26 Schematic diagram of the left and right wings in the expanded state of Example 6;

[0075] Fig. 27 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40°;

[0076] Fig.28 Schematic diagram of the initial state or the closed state after use of Example 7;

[0077] Fig.29 Schematic diagram of the left and right wings in the expanded state of Example 7;

[0078] Fig.30 Schematic diagram of the upper and lower wings in the expanded state with an opening angle of >40°. DETAILED DESCRIPTION

[0079] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any method and material similar or equivalent to the described content can be applied to the method of the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only.

[0080] Example 1

[0081] Examination type four-wing vaginal dilator

[0082] First refer to the attached Figure 1 and 4 -5, the inspection type four-wing vaginal dilator comprises: an upper dilating plate 01, comprising an upper wing 01-1, and a handle 01-2 which is integral with the upper wing 01-1 and extends downward along the rear end of one side of the upper wing; a lower dilating plate 02, the lower dilating plate 02 comprises a lower wing 02-1, a handle 02-2 which is integral with the lower wing 02-1 and extends downward along the lower wing 02-1 at a direction nearly at right angles thereto, and the upper wing 01-1 and the lower wing 02-1 are connected on both sides of the rear end by an axle pin 01-3 and an axle hole 02-5 respectively, so that the upper wing 01-1 and the lower wing 02-1 can be opened and closed by controlling the handle 01-2.

[0083] A first expansion and fixing device for fixing the upper wing 01-1 and the lower wing 02-1 in an open state, the device further comprises a positioning hook 01-7 with more than one gear position located below the push handle 01-3 on one side, and a positioning buckle 02-8 on the handle 02-4 corresponding to the positioning hook 01-7. According to another embodiment of the present invention, the first expansion and fixing device comprises: a positioning plate (not shown) having an arc-shaped groove with the pin as the rotation center is provided on the push handle, and a positioning rod with a nut (not shown) passing through the arc-shaped groove on the positioning plate is provided on the handle.

[0084] Please refer to the attached Figure 6 In the present invention, at least one positioning connector 03 is provided. The positioning connectors in this embodiment are provided as two on the left and right, which are a pair of the same structure but symmetrically arranged, and are placed on the outer side of the rear end of the upper wing 01-1, and are rotatably and detachably connected to the second axial hole 01-9 at the rear end of the upper wing 01-1 through the positioning connector pins 03-21 at both ends; the lower part of the positioning connector is also provided with a positioning connector axial hole 03-22 that can accommodate the side expansion piece corner axial pin 04-4, and a convex arc-shaped positioning connector gear 03-23 ​​is also provided on the top of the positioning connector; by turning the first handle 04-1, the side expansion piece 04 can be driven to rotate together with the positioning connector 03 in the second axial hole 01-9 of the upper wing, thereby adjusting the upper and lower positions of the side wing 04-5.

[0085] Please see Figure 7 In the present invention, at least one side expansion piece 04 is provided. In the present embodiment, two side expansion pieces are provided on the left and right sides, which are a pair of left and right wings 04-5 with the same structure but symmetrical configuration. The front part is much longer than the rear part. There is a side expansion piece corner axis pin 04-4 radially pointing inward and turning backward on the inner side of the rear part of the side wing. Behind the corner axis pin 04-4, there is a side expansion piece gear 04-3 radially pointing inward in a concave arc shape, which is meshed with the convex arc-shaped positioning connector gear 03-23 ​​to form a second expansion positioning device, which is used to adjust the size of the opening of the left and right wings 04-5 and fix the left and right wings 04-5 at the position where they need to be opened.

[0086] The above-mentioned side expansion piece 04 is a channel-free side expansion piece with a simpler structure and extremely few components, which greatly saves product costs and has excellent functions. A four-wing speculum has only four components in total (including an upper expansion piece 01, a lower expansion piece 02, a positioning connector 03 and a side expansion piece 04). When clinically needed, the upper, lower, left and / or right wings of the vagina can be effectively expanded, and the cervix is ​​completely exposed. It is very suitable for non-surgical screening of precancerous lesions or examination, sampling, physical therapy, etc. of patients with vaginal wall mucosal prolapse.

[0087] Continue to view Figure 1 Before clinical use, the upper wing 01-1, the lower wing 02-1, and the left and right wings 04-10 are all in a closed state. When clinical use begins, the doctor inserts the dilator into the vagina. At this time, the upper wing 01-1, the lower wing 02-1, and the left and right wings 04-10 are still in a closed state. It can be seen that the four-wing dilator enters the patient's vagina with the same volume as the double-wing vaginal dilator, eliminating the patient's fear and pain, and fully reflects the safety.

[0088] Please see Figure 2-3 When used clinically, the doctor presses the handle 01-2, and the upper wing 01-1 and the lower wing 02-1 are expanded to the desired field of view through the cooperation of the hook or the screw, and the positioning hook 01-7 enters the positioning buckle 02-8 to engage and fix. At this time, the doctor can decide how much the left and right wings should be expanded according to the patient and the condition. Through the adjustment of the gear, the left and right wings 04-10 are expanded to the desired position, and the doctor starts to check, diagnose and perform surgery. The present invention not only can adjust the upper and lower wings through the cooperation of the positioning hook and the positioning buckle or the screw and the screw The cap can be flexibly adjusted and positioned, and the upper and lower wings gradually expand upward and downward from the beginning of closure, and the opening angle can reach >40°. In addition, the left and right wings are also adjusted from the beginning of closure through the positioning connector gear and the side expansion piece gear to the time when they are most suitable for the individual situation of the patient and mesh. The opening distance of the left and right wings can reach >88mm, and the expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, which is particularly suitable for the visual field and surgical field requirements required for clinical examination or surgery.

[0089] Please continue to see Figure 1After use, the left and right wings can be folded inwards to the upper and lower wings, and then the upper and lower wings are folded inwards to wrap the left and right wings. After closing, the vagina can be taken out just like a double-wing vaginal dilator with only upper and lower wings, avoiding the exposure of the unreasonable side wings to the outside and causing pain to the patient. Therefore, the present invention is very clever and scientifically designed, which expands the doctor's vision and surgical field to the greatest extent and guarantees the clinical needs to the greatest extent. This is so far, looking at all the four-wing vaginal dilators at home and abroad, only the upper and lower wings and the left and right wings of the present invention expand outwards and the expansion angle and spacing are the safest, effective and most ideal. The opening spacing of the left and right wings of the imported four-wing speculum invented by Americans is only 33mm. In contrast, the opening spacing of the left and right wings of the present invention is 2.67 times or more than that of the imported products from the United States. The benefits brought about are that the space and vision of the entire dilator are expanded, and the upper, lower, left and right four wings are opened to the clinical required position for positioning, and the various examinations or surgeries of obstetrics and gynecology are met with the best opening degree.

[0090] Please continue to see Figure 1 When the clinical operation is completed, the doctor pinches the first handle 04-1 and the second handle 04-2 together, and the side expansion piece gear 04-3 can be separated from the positioning connector gear 03-23, and the side wing 04-5 is folded between the upper wing 01-1 and the lower wing 02-2. Then the doctor pushes the handle outward, the positioning hook slips out of the positioning buckle, the upper and lower wings (01-1, 02-2) are closed, and the doctor can take out the expander.

[0091] Example 2

[0092] Four-wing vaginal dilator for cervical surgery

[0093] The structure of the vaginal dilator of this embodiment is identical to that of the vaginal dilator of embodiment 1 except for the side dilating pieces. Therefore, the identical parts will not be described in detail. Figure 8 The side expansion piece 04 of the four-wing vaginal dilator for cervical surgery is hollow and has a channel. The channel 04-12 is composed of a channel body 04-11 and a channel cover 04-13 thereon. The inner side, upper side or lower side of the front end is provided with at least one opening communicating with the channel 18, and the rear end is a pipe joint.

[0094] See also Figure 6 , 8 -10, in this embodiment, the side expansion piece corner axis pin 04-18 is connected to the positioning connector axis hole 03-22, and the positioning connector axis pin 03-21 located inside the positioning connector axis hole 03-22 is connected to the second axis hole 01-9 at the rear end of the upper wing. By turning the pipe joint 04-17, the side expansion piece 04 and the positioning connector 03 can be driven to rotate in the second axis hole 01-9 of the upper wing, thereby adjusting the upper and lower positions of the side wing 04-10.

[0095] According to a preferred embodiment of the present invention, the side expansion piece 04 with the channel 04-12 is particularly suitable for use in patients with cervical cancer and cervical precancerous lesions and other transvaginal surgeries, such as ultra-high frequency radiofrequency knife surgery (also known as LEEP knife surgery). It not only has a wide surgical space, a large and clear surgical field, and comprehensive exposure, but also can immediately eliminate toxic smoke during surgery to protect the physical and mental health of medical staff and patients. On the other hand, the side expansion piece 04 with the channel 04-12 can be used for inspection as long as the rear end pipe joint 04-17 is not connected to the negative pressure device, which kills two birds with one stone and is very convenient and practical.

[0096] According to a preferred embodiment of the present invention, the axial front end of the channel body 04-11 can be closed or open, and the rear end has an opening that can be matched and connected with any pipeline (such as a negative pressure device) required clinically.

[0097] According to a preferred embodiment of the present invention, there is a groove (not shown) on the periphery of the channel body 04-11 for receiving the channel cover 04-13. The channel cover 04-13 is an elongated one, which is consistent with the shape of the groove on the channel body 04-11. When the channel cover 04-13 is embedded in the groove of the channel body 04-11, a pipeline is formed, thereby forming a passage consisting of the channel body 04-11, the pipeline between the channel cover 04-13 and the channel opening 04-14, and the rear end opening of the channel. When the channel 04-12 is used for smoke exhaust, smoke enters from the opening 04-14, and is connected to the negative pressure device (not shown) through the above-mentioned passage and the pipeline to exhaust the smoke. When it is necessary to install a lighting device or a camera device, the operator can open the channel cover 04-13, and accurately, quickly and conveniently install the LED light or camera in the opening 04-14 of the channel body 04-11 under direct vision, and the power supply line or signal line can be connected to the rear end opening of the channel body 04-11 through the channel 04-12.

[0098] Please continue to see Fig.10 This is the closed state of the four-wing vaginal dilator for cervical surgery before clinical use, when entering the vagina, and when being removed from the vagina after use. It can be seen that the surgical four-wing dilator has the same volume as the double-wing vaginal dilator when entering and being removed from the patient's vagina, eliminating the patient's fear and pain. It is a very humane design that fully reflects respect for human safety.

[0099] Please see Figure 11-12This is the expansion state during surgical clinical use, showing that the upper and lower wings gradually expand upward and downward since they are closed, and the opening angle can reach >40°. The left and right wings gradually expand to the left and right since they are closed, and the left-right distance can reach >88mm. Moreover, the expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, so it is very suitable for clinical cervical surgery.

[0100] Example 3

[0101] Instant-destructive inspection type four-wing vaginal dilator

[0102] The structure of the vaginal dilator of this embodiment is the same as that of the vaginal dilator of embodiment 1, except that the handle of the lower dilator of this embodiment has a destruction strip. The rest is exactly the same as that of the inspection type four-wing vaginal dilator of embodiment 1, so the same parts will not be repeated. Please refer to Fig.13 The handle 02-4 of the lower expansion piece 02 is provided with an instant-destruction strip 02-10, the front end of which is connected to the handle 02-4 through a tie 02-11 and the rear end through a material reduction groove 02-12, and the left and right sides are hollow windows 02-13, and there is a small protrusion 02-14 above the center of the instant-destruction strip 02-10 that is higher than the plane of the handle 02-4. The instant-destruction strip has three major functions: First, after use, the doctor only needs to press lightly on the small protrusion 02-14, and the tie 02-11 at the front end of the instant-destruction strip 02-10 will be broken and destroyed immediately. The doctor can achieve the purpose of breaking and destroying with light force, so it is very practical, and it is clear at a glance that the expander has been used by someone, thereby achieving the purpose of preventing secondary use. Secondly, the size of the instant-destruction hole after the instant-destruction strip is completely consistent with the buckle of the lower wing and is a close match, killing two birds with one stone; thirdly, the instant-destruction strip 02-10 is arranged on the handle, which does not take up any space, does not hinder any operation of the expander, and does not affect any function. Moreover, it has a simple structure, practical functions, and is easy to operate. It does not increase the mold and production costs, but can solve practical problems well.

[0103] Please continue to see Fig.14 The destructive inspection-type four-wing vaginal dilator is in the closed state before clinical use, when entering the vagina, and when being removed from the vagina after use. It can be seen that the four-wing dilator has the same volume as the double-wing vaginal dilator when entering and being removed from the patient's vagina, which is a very user-friendly design.

[0104] Please see Figure 15-16This is the expansion state of the expansion piece during clinical use, showing that the upper and lower wings gradually expand upward and downward from closing, and the opening angle can reach >40°. The left and right wings gradually expand from closing to the left and right, and the left and right spacing can reach >88mm. The expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, so it is very suitable for clinical cervical precancerous lesions, special patients and other vaginal examinations. And it is destroyed after use, and the destructible mark is clear at a glance, which plays a good role in preventing secondary use, especially for precancerous lesion examinations, etc., and it is particularly important to prevent cross-infection of iatrogenic diseases.

[0105] Example 4

[0106] Four-wing vaginal dilator for destructive cervical surgery

[0107] The structure of the vaginal dilator of this embodiment is identical to that of the vaginal dilator of embodiment 2 except that the handle of the lower dilator of this embodiment has an instant-destruction strip. The rest is identical to that of the four-wing vaginal dilator for cervical surgery of embodiment 2. The instant-destruction strip on the handle is identical to that of embodiment 3. Therefore, these two identical parts will not be described in detail. Please refer to Fig.17 , that is, the closed state of the four-wing vaginal dilator for destructive cervical surgery before clinical use, when entering the vagina, and when being taken out of the vagina after use. It can be seen that the surgical four-wing dilator has the same volume as the double-wing vaginal dilator when entering and being taken out of the patient's vagina, which is a very humanized design; Figure 18-19 , is the expansion state of the expansion piece during clinical use, showing that the upper and lower wings gradually expand upward and downward since closing, and the opening angle can reach >40°, and the left and right wings gradually expand to the left and right since closing, and the left and right spacing can reach >88mm, and the expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, so it is very suitable for clinical LEEP surgery for cervical cancer, etc. And it is destroyed after use, and the destruction is simple, clear and practical, especially for cervical cancer patients, etc., to prevent cross infection of iatrogenic diseases, which is particularly necessary and important.

[0108] Example 5

[0109] Three-tube four-wing vaginal dilator with upper wings

[0110] The structure of the vaginal dilator of this embodiment is the same as that of the four-wing vaginal dilator for cervical surgery in embodiment 2, except that this embodiment has an upper attached wing. Therefore, the same parts will not be repeated. Please refer to Fig. 20The upper wing 05 has a channel 05-2, and the channel is composed of a main body 05-1 and a channel cover 05-3 thereon. The edge of the main body may have a groove 05-6 for embedding the channel cover, and the channel cover is tightly matched; at least one opening 05-4 communicating with the channel 05-2 is provided on both sides of the upper wing main body and / or the channel cover, and there are three openings 05-4 on the channel cover of this embodiment, and an upper wing hook 05-8 is provided in the front near the top of the rear part of the upper wing, and the upper wing hook 05-8 is buckled into the limiting groove 01-10 in the middle of the rear end of the upper wing for detachable and rotatable fixation, and the rear end of the channel is the upper wing pipe joint.

[0111] Please see Fig.21 , before clinical use, when entering the vagina, and when being taken out of the vagina after use, the front end length of the upper wing of this embodiment does not exceed the front edge of the upper wing, the width is 10mm, and the thickness is 6mm. Such a small and exquisite upper wing type three-tube four-wing vaginal dilator has the same volume as the double-wing vaginal dilator and can be entered into and taken out of the patient's vagina, which is a very humanized design; Figure 22-23 , is the expansion state of the expansion piece when used clinically, showing that the upper and lower wings gradually expand upward and downward since they are closed, and the opening angle can reach >40°, and the left and right wings gradually expand to the left and right since they are closed, and the left-right spacing can reach >88mm (not shown), and the expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, so it is very suitable for clinical cervical cancer LEEP and other surgeries.

[0112] By turning the upper wing pipe joint, the upper wing can be rotated to the left edge of the upper wing or to the right edge of the upper wing. When the upper wing is used for lighting, video or smoke exhaust, the head end of the upper wing can be rotated, which will be of great help in clinical practice. If it is used for smoke exhaust, three-pronged approach can be used to exhaust smoke quickly and effectively. Or the upper wing is used for lighting, and the left and right wings are used for smoke exhaust, etc., which is also a good choice.

[0113] Example 6

[0114] Three-tube four-wing vaginal dilator with lower wings

[0115] The structure of the vaginal dilator of this embodiment is the same as that of the four-wing vaginal dilator for cervical surgery in embodiment 2, except that this embodiment has a lower attached wing. Therefore, the same parts will not be repeated. Please refer to Fig.24The lower wing 06 has a channel 06-9, which is formed by a main body 06-7 and a groove 06-3 on its edge for a cover 06-8 thereon to fit tightly and quickly connect with the staple hole on the main body through the channel cover staple 06-9; at least one main body opening 06-6 or channel cover opening 06-7 communicating with the channel 06-9 is provided on both sides of the lower wing main body or the channel cover. In this embodiment, one opening 06-6 is provided on each side of the lower wing main body and five openings 06-7 are provided on the channel cover; a lower wing buckle 06-11 is provided below the lower wing near the tail, and the lower wing buckle 05-8 is pressed into the instant-destruct hole on the handle for fixing, and the rear end of the lower wing is a pipe joint 06-12.

[0116] Please see Fig.25 , before clinical use, when entering the vagina, and when taken out of the vagina after use, the front end length of the lower wing of this embodiment does not exceed the front edge of the lower wing, the width is 8mm, the thickness is 5mm, and the more compact and exquisite lower wing type three-tube four-wing vaginal dilator is the same volume as the double-wing vaginal dilator. It is very humanized design; Figure 26-27 , is the expansion state of the expansion piece when used clinically, showing that the upper and lower wings gradually expand upward and downward since they are closed, and the opening angle can reach >40°, and the left and right wings gradually expand to the left and right since they are closed, and the left-right spacing can reach >88mm (not shown), and the expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, so it is very suitable for clinical cervical cancer LEEP and other surgeries.

[0117] Example 7

[0118] Four-tube four-wing surgical vaginal dilator

[0119] The structure of the vaginal dilator of this embodiment is compared with that of the embodiment 2. Except that this embodiment has upper and lower attached wings, the rest are exactly the same as the four-wing vaginal dilator for cervical surgery in embodiment 2. The upper attached wing is the same as that in embodiment 5, and the lower attached wing is the same as that in embodiment 6. Therefore, the same parts will not be repeated. Please refer to Fig.28 , before clinical use, when entering the vagina, and when removed from the vagina after use, although the upper and lower wings are equipped with upper and lower wings on the inner surface, it still enters the patient's vagina and is removed from the vagina with the same volume as a double-wing vaginal dilator, which requires a very humanized design; please refer to Figure 29-30, its opening angle can reach >40°, and the left and right wings can reach >88mm (not shown) when they gradually expand from the closed position to the left and right, and the expansion size of the upper and lower wings or the left and right wings can be gradually adjusted according to clinical needs, so it is very suitable for clinical cervical cancer LEEP and other surgeries. With a four-tube four-wing vaginal dilator, multiple functions such as lighting, video, drainage, and smoke exhaust can be realized at the same time, expanding the use function. Whether it is three tubes and four wings or four tubes and four wings, it creates conditions for the free combination of multiple functions of the vaginal dilator, realizes multi-functions, and creates new varieties and new styles.

[0120] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A vaginal dilator for cervical examination and surgery, comprising an upper dilator and a lower dilator, the upper dilator comprising an upper wing, and a handle integral with the upper wing and extending downward along one side of the upper wing at an obtuse angle thereto, the lower dilator comprising a lower wing, and a handle integral with the lower wing and extending downward along one side of the lower wing at a direction nearly perpendicular thereto, the two sides of the rear ends of the upper wing and the lower wing being connected to the shaft hole by an axle pin, the handle and the handle being positioned by a first dilator positioning device and the upper and lower attached wings respectively accommodated on the inner sides of the upper and lower wings, characterized in that: It also includes a second expansion and positioning device composed of a positioning connector and a side expansion piece meshed with each other through gears, and an instant-destruction strip is provided on the handle; The positioning connector has a radially inwardly extending positioning connector shaft pin on the inner side of the lower part, which is rotatably and detachably connected to the second shaft hole at the rear end of the upper wing. The positioning connector shaft pin is also provided on the outer side of the positioning connector shaft pin, which can receive the rotatable and detachable connection of the side expansion plate corner shaft pin. A positioning connector gear is also provided on the top of the positioning connector, which meshes with the side expansion plate gear. The side expansion piece is one solid, and its rear end is a first handle, and the other is hollow, and its rear end is a pipe joint. The front inner side of the first handle or the pipe joint of the side expansion piece has a side expansion piece gear extending radially inward and having a second handle, and the front inner side of the gear has a side expansion piece corner axis pin extending radially inward and turning backward, and the front part of the corner axis pin is a side wing; The pipe joint or the first handle and the second handle are kneaded toward each other to drive the side expansion piece gear to bend upward and move above the positioning connector gear, so that the left and right wings are horizontally opened outward and folded inward between the upper and lower wings.

2. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: One end of the side expansion piece gear is fixedly connected to the side wing, and the other end is a free end, and the second handle is arranged on the free end.

3. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The side expansion piece corner axis pin is connected through the axis hole of the positioning connector, and the axis pin of the positioning connector is connected and rotated with the second axis hole at the rear end of the upper wing. By turning the pipe joint or the first handle, the side expansion piece and the positioning connector are driven to rotate in the second axis hole of the upper wing, thereby adjusting the upper and lower positions of the side wing.

4. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The upper expansion piece includes: an upper wing, and a handle integral with the upper wing and extending backward along the rear end of one side of the upper wing, an axle pin is provided between the upper wing and the handle, and a second axle hole for receiving the axle pin of the positioning connector is provided in front of the axle pin; The lower expansion piece comprises: a lower wing, and a handle which is integrated with the lower wing and extends downward from the rear end of the lower wing, and an axial hole is arranged between the lower wing and the handle.

5. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The instant-destructive strip has a front end connected to the handle via a tie and a rear end connected to the handle via a material reduction groove, and has hollow windows on its left and right sides. There is a small protrusion above the center of the instant-destructive strip that is higher than the plane of the handle. The position and size of the instant-destructive strip match the lower wing buckle. When the lower wing buckle is pressed into the instant-destructive strip, the instant-destructive strip is immediately broken to form an instant-destructive hole, which is tightly fixed to the lower wing buckle.

6. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The lower wing has a channel, which consists of a channel body and a channel cover that fits closely with it. The edge of the channel body is provided with a groove for embedding the channel cover. The channel body is provided with at least one opening below its front end and on both sides. The channel cover has at least one opening facing the vagina. A lower wing buckle is provided below the lower wing near the tail. The lower wing buckle is pressed into the instant-destruct hole on the handle to fix it. The rear end is a lower wing pipe joint.

7. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The upper wing has a channel, which is composed of a channel body and a channel cover that fits closely with the channel body. The edge of the channel body has a groove for inserting the channel cover. The channel cover has at least one opening facing the vagina. The rear end of the channel is an upper wing pipe joint. An upper wing hook is provided at the front of the rear part of the upper wing near the top end, and the upper wing hook is buckled into the limiting groove in the middle part of the rear end of the upper wing for detachable and rotatable fixation. The upper wing can be rotated to the left to the left edge of the upper wing or to the right to the right edge of the upper wing by moving the upper wing pipe joint.

8. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The first expansion positioning device is composed of a positioning hook and a positioning buckle. There is at least one or more positioning hooks, and the positions of the positioning hook and the positioning buckle are interchangeable. When the positioning hook and the positioning buckle are engaged and expanded to the maximum gear, the opening angle of the upper and lower wings can be greater than 40°.

9. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that: The first expansion positioning device includes a positioning plate with an arc-shaped groove on the handle and a pin connecting the upper and lower wings as the rotation center, and a screw with a nut passing through the arc-shaped groove on the positioning plate is provided on the handle. When the nut and the screw are screwed together and expanded to the maximum gear, the upper and lower wings can open at an angle of >40°.

10. The vaginal dilator for cervical examination and surgery according to claim 1, characterized in that The axle pin, the positioning connector axle pin and the side expansion piece corner axle pin are large at both ends and small in the middle, solid in the middle and lower parts and open in the middle and upper parts, the edge diameter of the open piece is larger than the diameter of the open piece, and the whole is dumbbell-shaped.

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