Multi-blade synchronous expansion and contraction type vaginal speculum

Abstract

The utility model relates to a multi-blade synchronous expansion type vaginal speculum which is composed of a speculum base, blades and a power mechanism. The vaginal speculum is simple in design, convenient to operate and suitable for vagina and cervix uteri examination of women of all ages, especially in postpartum hemorrhage reason diagnosis and vagina and cervix uteri laceration suturing, and meanwhile compared with a traditional vaginal retractor which needs to be operated by multiple persons and is limited in visual field exposure, the vaginal speculum has the advantages that by means of the multi-blade design and the independent fixing function, the vaginal speculum is more convenient to use. In addition, the vaginal speculum can rapidly position and fix bleeding spots and hematoma positions, efficient bleeding control is achieved, the postpartum bleeding amount, the complication occurrence rate and the blood transfusion requirement are remarkably reduced, and the mortality risk of pregnant and lying-in women is reduced. And meanwhile, the device has excellent applicability in various transvaginal operations such as hysterectomy, cervix uteri examination and treatment, female reproductive organ prolapse repair and the like.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically relating to a multi-leaf synchronous dilation vaginal speculum. Background Technology

[0002] Postpartum hemorrhage is one of the leading causes of maternal mortality worldwide. In China, the mortality rate due to postpartum hemorrhage has decreased by more than 50% over the past two decades, but there is still room for further improvement. Early identification and rapid intervention are crucial to reducing the risk of postpartum hemorrhage-related mortality. In clinical practice, the "four early principles"—early emergency calls and team resuscitation, early comprehensive assessment and dynamic monitoring, early hemostasis, and early volume resuscitation and component transfusion—have been proven to be significantly effective in reducing maternal mortality. The rapid implementation of these measures can effectively prevent the condition from worsening, improve overall nursing quality, and enhance emergency response capabilities.

[0003] Traditionally, uterine atony has been the leading cause of postpartum hemorrhage, accounting for approximately 63% of cases. This problem has been somewhat alleviated thanks to the use of uterotonic drugs and intrauterine balloon techniques. However, the proportion of bleeding caused by soft tissue lacerations is on the rise, accounting for about 20%. In particular, lacerations and hematomas of the cervix and vagina are more difficult to diagnose and manage due to the slower recovery of the uterus and ligaments after delivery.

[0004] In practice, duckbill-shaped vaginal speculum made of iron or plastic is difficult to use quickly and effectively for examining the deep vagina and cervix due to its limited opening angle and insufficient fixation. Although vaginal retractors can help provide visual exposure, they require three people to operate, increasing time and labor costs. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a novel multi-leaf synchronous dilation vaginal speculum.

[0006] To achieve the above objectives, the solution adopted by this utility model is as follows:

[0007] A multi-leaf synchronous expansion and retraction vaginal speculum includes a base, blades, and a power mechanism. The base includes a movable seat and a follower seat that are relatively adjustable. There are at least three blades, one of which is mounted on the movable seat and abuts against the lower end of the perineal vestibule outside the vagina, while the remaining blades are mounted on the follower seat and abut against the side and / or top of the vaginal wall. Some blades can also be rotated around their own axis in the up-down and / or left-right directions to adjust their angle and position. The power mechanism is used to drive the movable seat to move relative to the follower seat to synchronously expand or retract the multiple blades outward or inward to adjust the size of the vaginal opening. The power mechanism can also lock the movable seat and the follower seat in the current adjustment position.

[0008] Preferably, each leaf blade comprises a blade body arched outward from both sides, wherein the blade body is attached to the vaginal wall from the outward arched surface. In order to avoid causing discomfort or causing damage to the vaginal wall.

[0009] According to one specific implementation and preferred aspect of the present application, each leaf blade further comprises an intervention end arranged at the insertion end of the blade body and arched, wherein the end of the intervention end is rounded and attached to the vaginal wall from the outer arched surface. The arrangement of the intervention end not only facilitates the formation of a guide for insertion into the vagina, but also avoids causing damage to the vaginal wall.

[0010] According to another specific implementation and preferred aspect of the present application, the movable seat comprises a seat body with a plurality of movable channels formed therein, and the follower seat comprises a follower rod rotatably connected at one end and slidingly passing through each movable channel; an external connection part mounted at the other end of each follower rod, wherein the leaf blades are respectively mounted on the seat body and the external connection part, and the plurality of follower rods are expanded or contracted by the sliding support of the seat body to realize the expansion or contraction of the plurality of leaf blades. Using the expansion and contraction principle similar to an umbrella, not only the synchronization and stability of the movement are ensured, but also the operating force can be controlled at any time to avoid accidental injury.

[0011] Preferably, sliding guide rods or guide wheels are formed on opposite sides of each movable channel, and each follower rod is slidingly attached to the sliding guide rods or guide wheels on both sides; based on the sliding guide, the relative movement of the movable seat and the follower seat is more convenient to implement.

[0012] Further, the movable channels of the seat body are composed of two clamping pieces, and locking screw members for relatively locking the clamping pieces and the follower rods are further arranged on each movable channel. Although the leaf blades will not be displaced as long as the positions of the movable seat and the follower seat are relatively fixed, in order to ensure the stability of the adjustment, the locking screw members are further locked to form double positioning to avoid misoperation during the examination.

[0013] In some specific implementations, the leaf blades mounted on the seat body are reference leaf blades, which are arranged with the arched surface downward; and the leaf blades mounted on each external connection part are adjustment leaf blades, and each adjustment leaf blade can be adjusted in angle by being flipped inward or outward relative to the reference leaf blades. In this way, under the premise of the required size of the vaginal orifice, the flipping adjustment of the adjustment leaf blades is performed to facilitate the physician to perform the examination in the best field of view, and the effect is very significant (the leaf blades in the prior art are basically unable to continue adjusting the expansion position on the basis of expansion).

[0014] Specifically, an arc-shaped groove with a center located in the expansion area formed by the plurality of blades is formed at the end of each follower rod, and each outer connecting part can be slidably adjusted between the upper and lower ends of the arc-shaped groove to change the inward or outward turning of the corresponding adjusting blades. In short, based on the arc-shaped groove arranged in the up-down direction, the angular turning adjustment of the adjusting blades is implemented during the up-down movement, which is also non-obvious.

[0015] Further, each outer connecting part includes a connecting piece fixed to the exposed end of each blade, and a locking bolt piece penetrating the arc-shaped groove and capable of relatively locking and adjusting the connecting piece and the follower rod. Based on the locking bolt piece, the angularly turned blades are further positioned, further reducing the misoperation rate during diagnosis and treatment.

[0016] In some specific embodiments, there are two movable channels, two follower rods, and three blades, one of which is installed on the seat body, and the other two are installed on the two outer connecting parts. The blade installed on the seat body is the reference blade, the blades installed on the outer connecting parts are the adjusting blades, and the length of the reference blade is greater than that of the adjusting blades. This design is completely based on the human body structure, which optimally avoids damage to the vagina or hymen caused by the blades.

[0017] In addition, the power mechanism includes a nut seat installed at the rotating end of the follower seat, and a power screw rod cooperated with the nut seat to form a transmission screw rod, wherein the driving end of the power screw rod is freely rotatably connected to the movable seat, and the nut seat is further provided with a locking nut for locking the nut seat and the power screw rod; the adjusting nut is further provided at the adjusting end of the power screw rod, and when the locking nut is unlocked, the power screw rod rotates, the nut seat moves linearly relative to the power screw rod to make the movable seat and the follower seat relatively move to be synchronously expanded or contracted. In short, the conventional screw nut cooperation mode is adopted to realize the synchronous expansion or contraction of the plurality of blades, which is not only convenient to operate, but also relatively stable. Therefore, under the double locking (the screw nut itself forms a first locking, and the locking nut forms a second locking), the blades are more ideally positioned at the adjusting position to facilitate the diagnosis of the physician.

[0018] Due to the use of the above technical and equipment scheme, the utility model overcomes the limitations of traditional equipment through innovative design and has the following main advantages:

[0019] 1. Innovation of expansion and fixation function: The traditional metal and plastic duckbill-shaped vaginal speculum is limited by the insufficient opening angle and fixation ability, and the vaginal retractor needs to be coordinated by multiple operators, resulting in complex operation and limited field of view. The device provides a full-range observation for the vagina and the cervix uteri area through the adjustable blade expansion and self-rotation function. After adjustment, the device can be stably maintained at the required angle and position, effectively preventing sliding or falling during the operation.

[0020] 2. High efficiency and independent operation: The device is suitable for various transvaginal operations. By precisely exposing the surgical field, the device enables a single operator to perform surgical operations efficiently, significantly reducing the dependence on collaborators. In particular, when dealing with postpartum hemorrhage, the device is suitable for the treatment and suture of soft birth canal lacerations. The device quickly locates the bleeding point, ensures a sufficient field of view, and accelerates hemostasis and suturing.

[0021] 3. Wide surgical applicability: The device is not only suitable for postpartum hemorrhage-related operations, but also helps other vaginal surgeries, such as transvaginal hysterectomy, cervical examination and treatment, and female genital organ prolapse repair surgery, etc. In these applications, the device exhibits excellent applicability and operational convenience.

[0022] In summary, through innovative design, the multi-leaf synchronous expansion type vaginal speculum effectively improves the convenience of clinical operation and patient comfort, and enhances the overall medical effect and safety. It exhibits unique advantages in a wide range of applications, fully meeting the patent application standards. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the multi-leaf synchronous expansion type vaginal speculum of the present embodiment (when retracted);

[0024] Figure 2 is a front view schematic diagram of Figure 1 ;

[0025] Figure 3 is a right view schematic diagram of Figure 2 ;

[0026] Figure 4 is a top view schematic diagram of Figure 2 ;

[0027] Figure 5 is a structural schematic diagram of the multi-leaf synchronous expansion type vaginal speculum of the present embodiment (when expanded);

[0028] Figure 6 is a front view schematic diagram of Figure 5 ;

[0029] Figure 7 is a right view schematic diagram of Figure 6 ;

[0030] Figure 8 is a top view schematic diagram of Figure 6 ;

[0031] Wherein: 1, base; 10, movable seat; 100, base body; t, movable channel; g, sliding guide rod; 11, follow-up seat; 110, follow-up rod; h, arc-shaped slot; 111, external connection part; a, connecting piece; b, locking bolt; s, locking bolt;

[0032] 2, blade; 20, blade body; 21, insertion end;

[0033] 3, power mechanism; 30, nut seat; 31, power screw; 32, locking nut; 33, adjusting nut. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and that the present application is not limited to the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0039] like Figures 1 to 8 As shown, the multi-leaf synchronous dilation vaginal speculum of this embodiment includes a base 1, a blade 2, and a power mechanism 3.

[0040] Specifically, the base 1 includes a movable base 10 and a follower base 11 that are relatively adjustable. The movable base 10 includes a base body 100 that forms two movable channels t inside. The follower base 11 includes two follower rods 110 that are rotatably connected from one end and slide through each movable channel t. An external part 111 is installed at the other end of each follower rod 110.

[0041] In the example, the three leaves 2 are installed on the seat body 100 and the outer connecting part 111, respectively. In some embodiments, one leaf 2 is installed on the seat body 100 and contacts the bottom of the vaginal wall, and the remaining leaves 2 are installed on the outer connecting part 111 and contact the side of the vaginal wall. The two follower rods 110 are expanded or retracted by the sliding support of the seat body 100 to expand or retract the multiple leaves 2. In short, one of the three leaves 2 is installed on the seat body 100, and the other two are installed on the two outer connecting parts 111. The leaf installed on the seat body is the reference leaf, the leaves installed on the outer connecting parts are the adjustment leaves, and the length of the reference leaf is greater than that of the adjustment leaves. This design is based on the human body structure and optimally avoids damage to the vagina or hymen caused by the leaves. At the same time, the expansion and retraction principle similar to an umbrella is adopted, which not only ensures the synchronization and stability of the movement, but also allows the operation force to be controlled at any time to avoid accidental injury. Each leaf 2 includes a leaf body 20 arched outward from both sides, and an insertion end 21 arched and arranged at the insertion end of the leaf body 20. The leaf body 20 is attached to the vaginal wall from the outward arched surface, and the end of the insertion end 21 is rounded and transitions, and is attached to the vaginal wall from the arched outward surface. This avoids causing discomfort or damage to the vaginal wall. The insertion end is arranged to facilitate the formation of a guide for insertion into the vagina and to avoid puncturing the vaginal wall.

[0042] Further, sliding guide rods g are formed on opposite sides of each movable channel t, and each follower rod 110 is slidably attached to the sliding guide rod g from both sides. Based on the sliding guide, the relative movement of the movable seat and the follower seat is more easily implemented. At the same time, the movable channel of the seat body 100 is composed of two clamping pieces, and each movable channel t is provided with a locking screw s for locking the clamping piece and the follower rod 110. Although the leaves will not be displaced as long as the positions of the movable seat and the follower seat are relatively fixed, in order to ensure the stability of the adjustment, the locking screw is further locked to form double positioning to avoid misoperation during examination.

[0043] In some embodiments, the partial blades 2 can also be flipped around their own axes in the up-down and / or left-right directions for angle and position adjustment, wherein the blades 2 mounted on the seat body 100 are reference blades, which are kept in an arch shape and arranged downward; the blades 2 mounted on each outer connecting part 111 are adjustment blades, which can be flipped inward or outward relative to the reference blades for angle adjustment. In this way, the flipping adjustment of the adjustment blades can be performed under the premise of the required size of the vaginal orifice, so that the physician can perform the diagnosis in the best view, and the effect is very significant (the blades in the prior art cannot be further adjusted in the expanded position). Specifically, the end of each follower rod 110 is formed with an arc-shaped groove h with a center located in the expansion area formed by the plurality of blades, and each outer connecting part 111 can be slidably adjusted between the upper and lower ends of the arc-shaped groove h to change the inward or outward flipping of the corresponding adjustment blade. In short, the angle flipping adjustment of the adjustment blades is implemented in the up-down movement based on the arc-shaped groove arranged in the up-down direction, which is also non-obvious. Further, each outer connecting part 111 includes a connecting piece a fixed to the exposed end of each blade 2, and a locking bolt piece b penetrating the arc-shaped groove h and capable of relatively locking and adjusting the connecting piece a and the follower rod 110. The locking bolt piece further positions the blades flipped at an angle, further reducing the misoperation rate during diagnosis and treatment.

[0044] The power mechanism 3 is used to drive the movable seat 10 to move relative to the follower seat 11 to synchronously expand or contract the three blades 2 outward or inward to adjust the size of the vaginal orifice, and the power mechanism 3 can also lock the movable seat 10 and the follower seat 11 at the current adjustment position. In the following embodiments, the power mechanism 3 includes a nut seat 30 mounted on the rotating end of the follower seat 11, and a power screw 31 cooperating with the nut seat 30 to form a transmission screw, wherein the driving end of the power screw 31 is freely rotatably connected to the movable seat 10, and the nut seat 30 is further provided with a locking nut 32 for locking the nut seat 30 and the power screw 31; the adjustment nut 33 is further provided on the adjustment end of the power screw 31, and when the locking nut 32 is unlocked, the power screw 32 is rotated, and the nut seat 30 moves linearly relative to the power screw 31 to make the movable seat 10 and the follower seat 11 move relative to each other for synchronous expansion or contraction. In short, the conventional screw nut cooperation is adopted to realize the synchronous expansion or contraction of the plurality of blades, which is not only convenient to operate, but also relatively stable, and therefore, the blades are further positioned at the adjustment position under double locking (the screw nut itself forms a first locking, and the locking nut forms a second locking), so as to facilitate the physician's diagnosis.

[0045] In summary, after the multi-leaf synchronous expansion type vaginal speculum is used, based on the multiple leaves and the seat respectively abutting against the vaginal side wall and the vaginal external vestibule, the vaginal and cervical canal are exposed by the leaf expansion, so as to effectively expand and clearly view the vaginal and cervical canal, and the power mechanism can also lock the movable seat and the follower seat at the current adjustment position. Therefore, the first aspect of the utility model not only provides all-round observation for the vaginal and cervical canal area through the adjustable leaf expansion and self-rotation function, so as to solve the problem of limited view angle or patient discomfort caused by excessive opening, and is convenient for observing the whole picture of the cervical canal and vagina, and is suitable for women of different ages, especially greatly reduces the tearing rate of hymen of young girls and patients without sexual life; the second aspect is based on the ability to be locked at the current adjustment position, so that the doctor can release both hands, and the gynecological routine examination (especially the examination of the cause of postpartum hemorrhage, such as rapid positioning and suturing of soft birth canal laceration) can be performed without the help of an assistant, which not only eliminates the psychological obstacles of patients, but also facilitates the diagnosis and treatment operation of doctors, greatly reduces the misoperation rate of doctors during diagnosis and treatment; the third aspect is that the self-arched surface of the blade body is attached to the vaginal wall, the end of the intervention end is rounded, and the self-arched surface of the intervention end is attached to the vaginal wall, which not only facilitates the insertion of the formed guide into the vagina, but also avoids causing damage to the vaginal wall; the fourth aspect adopts the opening and closing principle similar to an umbrella, which not only ensures the synchronism and stability of movement, but also can control the operation force at any time to avoid accidental injury; the fifth aspect is based on sliding guide, which is more convenient for the relative movement of the movable seat and the follower seat, and as long as the positions of the movable seat and the follower seat are relatively fixed, the leaf will not be displaced, but in order to ensure the stability of adjustment, a locking bolt is further used for locking, so as to form double positioning to avoid misoperation during diagnosis and treatment; the sixth aspect is that the turning adjustment of the adjusting leaf is carried out under the premise of the size of the vaginal orifice, so as to facilitate the doctor to diagnose in the best view field, and the effect is very remarkable (the leaf in the prior art basically cannot continue to adjust the expansion position on the basis of expansion); the seventh aspect is that the arc-shaped groove based on the upper and lower layout is used for implementing the angle turning adjustment of the adjusting leaf during the upward and downward movement, which is also non-obvious; the eighth aspect is that the locking bolt is further used for positioning the angle turning leaf, so as to further reduce the misoperation rate during diagnosis and treatment; the ninth aspect is that the length of the reference leaf is greater than the length of the adjusting leaf, which is completely based on the human body structure, and the best way to avoid damage to the vaginal wall or hymen caused by the leaf; the tenth aspect is that the conventional screw nut cooperation mode is used to realize the synchronous expansion or contraction of multiple leaves, which is not only convenient to operate, but also relatively stable, so that the leaf is further positioned at the adjustment position under double locking (the screw nut itself forms a first locking, and the locking nut forms a second locking), so as to facilitate the diagnosis of doctors.

[0046] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A multi-blade synchronous dilation vaginal speculum, comprising a base, blades, and a power mechanism, characterized in that: The device base includes a movable base and a follower base that are relatively adjustable. There are at least three blades, one of which is mounted on the movable base and abuts against the lower end of the vulvar vestibule. The remaining blades are mounted on the follower base and abut against the side and / or top of the vaginal wall. Some blades can also be rotated around their own axis in the up-down and / or left-right directions to adjust their angle and position. The power mechanism is used to drive the movable base to move relative to the follower base to synchronously expand or retract the multiple blades outward. The power mechanism can also lock the movable base and the follower base in the current adjustment position.

2. The multi-leaf synchronous dilation vaginal speculum according to claim 1, characterized in that: Each of the blades includes a blade body that arches outward from both sides, wherein the arched surface of the blade body conforms to the vaginal wall.

3. The multi-leaf synchronous dilation vaginal speculum according to claim 2, characterized in that: Each blade also includes an arched insertion end disposed at the insertion end of the blade body, wherein the end of the insertion end has a rounded transition and conforms to the vaginal wall from the outer arched surface.

4. The multi-leaf synchronous dilation vaginal speculum according to claim 1, characterized in that: The movable seat includes a seat body with multiple movable channels inside. The follower seat includes a follower rod that is rotatably connected to one end and slides through each of the movable channels. An external part is installed at the other end of each follower rod. The blades are respectively installed on the seat body and the external part, and the multiple follower rods are opened or closed by the sliding of the seat body to realize the expansion or closure of the multiple blades.

5. The multi-leaf synchronous dilation vaginal speculum according to claim 4, characterized in that: Sliding guide rods or guide wheels are formed on opposite sides of each of the said movable channels, and each of the said follower rods slides and abuts against the sliding guide rods or guide wheels from both sides; and / or, the movable channel of the seat body is composed of two clamping pieces, and each of the said movable channels is also provided with locking bolts for locking the clamping pieces relative to the follower rods.

6. The multi-leaf synchronous dilation vaginal speculum according to claim 4, characterized in that: The blades installed on the base body are reference blades, which are arched and facing downwards; the blades installed on each of the external parts are adjustment blades, and each of the adjustment blades can be flipped inwards or outwards relative to the reference blades to adjust the angle.

7. The multi-leaf synchronous dilation vaginal speculum according to claim 6, characterized in that: An arc-shaped groove with its center located within the expansion area formed by the multiple blades is formed at the end of each of the following rods. Each of the external connecting parts can be slidably adjusted between the upper and lower ends of the arc-shaped groove to change the inward or outward rotation of the corresponding adjusting blade.

8. The multi-leaf synchronous dilation vaginal speculum according to claim 7, characterized in that: Each of the external parts includes a connecting piece fixed to the exposed end of each of the blades, and a locking bolt that passes through the arcuate groove and can lock and adjust the connecting piece relative to the follower rod.

9. The multi-leaf synchronous dilation vaginal speculum according to claim 4, characterized in that: There are two active channels, two follower rods, and three blades. One blade is installed on the base body, and the other two blades are installed on two external parts respectively. The blade installed on the base body is the reference blade, and the blades installed on the external parts are the adjustment blades. The length of the reference blade is greater than the length of the adjustment blade.

10. The multi-leaf synchronous dilation vaginal speculum according to any one of claims 4 to 9, characterized in that: The power mechanism includes a nut seat mounted on the rotating end of the follower seat and a power screw that cooperates with the nut seat to form a transmission screw. The drive end of the power screw is rotatably connected to the movable seat. The nut seat is also provided with a locking nut for locking the nut seat and the power screw together. An adjusting nut is also provided on the adjusting end of the power screw. When the locking nut is unlocked, the power screw rotates, and the nut seat moves linearly relative to the power screw so that the movable seat and the follower seat move relative to each other to expand or contract synchronously.

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