Dilation structure and four-wing vaginal dilator

Abstract

The present invention discloses an expansion structure, which includes an upper expansion piece, a lower expansion piece, a stopper and two side expansion pieces. The upper expansion piece is connected to the lower expansion piece and can rotate relatively. The stopper is arranged on the upper expansion piece or the lower expansion piece. The two side expansion pieces are respectively rotatably connected to the opposite sides of the lower expansion piece. During the relative opening of the upper expansion piece and the lower expansion piece, one end of the two side expansion pieces slides toward each other along the stopper, and the other ends of the two side expansion pieces are relatively opened. When in the opened state, an inspection channel is formed between the upper expansion piece, the lower expansion piece and the two side expansion pieces. During the relative closing of the upper expansion piece and the lower expansion piece, one end of the two side expansion pieces slides back to back along the stopper, and the other ends of the two side expansion pieces are relatively closed. The present invention also discloses a four-wing vaginal dilator. In the process of relative opening or closing of the upper expansion piece and the lower expansion piece, the sliding cooperation between the stopper and the two side expansion pieces can drive the two side expansion pieces to open or close synchronously. The overall expansion structure is simple and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an expansion structure and a four-wing vaginal dilator. Background Art

[0002] Vaginal dilators are commonly used medical devices for examining gynecological diseases. Traditional duckbill-shaped vaginal dilators are mostly two-wing structures. In order to improve the dilation effect of the dilator without changing the doctor's usage habits, there are currently some dilators on the market that have improved the two-wing structure to a four-wing structure. However, the expansion structure of the existing four-wing vaginal dilator is relatively complex, and multiple linkage structures are required to achieve synchronous expansion of the four wings of the dilator, which is difficult to operate and has a high production cost. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides an expansion structure and a four-wing vaginal dilator.

[0004] The present invention discloses an expansion structure, which comprises:

[0005] An expansion structure, characterized by comprising:

[0006] Upper expansion piece;

[0007] The lower expansion piece, the upper expansion piece is connected to the lower expansion piece and can rotate relative to each other, and the two pieces switch between an open state and a substantially closed state during the relative rotation;

[0008] A limiter, which is arranged on the upper expansion piece or the lower expansion piece; and

[0009] Two side expanders are respectively rotatably connected to the opposite sides of the lower expander. During the relative opening of the upper expander and the lower expander, one end of the two side expanders slides toward each other along the limit pieces, and the other ends of the two side expanders are relatively opened. When in the opened state, an inspection channel is formed between the upper expander, the lower expander and the two side expanders. During the relative closing of the upper expander and the lower expander, one end of the two side expanders slides back to back along the limit pieces, and the other ends of the two side expanders are relatively closed, and the two side expanders are retracted into the accommodating space formed after the upper expander and the lower expander are closed.

[0010] According to an embodiment of the present invention, there are two limit members, which are relatively arranged on the upper expansion member or the lower expansion member, and one end of the two side expansion members slides toward or away from the two limit members respectively.

[0011] According to one embodiment of the present invention, the upper expansion piece includes an upper expansion section and an inspection section, the inspection section is connected to the upper expansion section, the inspection section is connected to the lower expansion piece and can rotate relatively, and the inspection section is formed with an inspection port, and when in an open state, the inspection port faces the inspection channel.

[0012] According to one embodiment of the present invention, the upper expansion piece further includes a pressing portion, which is disposed in the inspection section. When force is applied to the pressing portion, the pressing portion drives the upper expansion piece and the lower expansion piece to rotate relative to each other, and two limit members are disposed relative to the pressing portion.

[0013] According to an embodiment of the present invention, the limiting member is inclined from the outer side of the inspection channel toward the inner side of the inspection channel.

[0014] According to an embodiment of the present invention, there is an avoidance position between the two limiting members.

[0015] According to one embodiment of the present invention, the limiting member has a first surface and a second surface, the first surface intersects with the second surface, the second surface has a first end and a second end, and the second surface gradually approaches the first surface as it extends from the first end toward the second end, and the second surface is slidably connected with one end of the side expansion member.

[0016] According to one embodiment of the present invention, the side expander includes a side expansion section, a rotating part and a sliding part, the side expansion section is connected to the sliding part, the sliding part is slidably connected to the limiting part, one end of the rotating part is connected to the connection between the side expansion section and the sliding part, and the other end of the rotating part is rotatably connected to the lower expander, and during the relative opening of the upper expander and the lower expander, the two sliding parts slide toward each other along the limiting part, the two side expansion sections are relatively opened, and an inspection channel is formed between the upper expander, the lower expander and the two side expansion sections, and during the relative closing of the upper expander and the lower expander, the two sliding parts slide back to back along the limiting part, the two side expansion sections are relatively closed, and the two side expansion sections are retracted into the accommodating space formed after the upper expander and the lower expander are closed.

[0017] According to an embodiment of the present invention, the sliding portion has a limiting arc-shaped end, and the limiting arc-shaped end is in sliding connection with the limiting member.

[0018] A four-wing vaginal dilator comprises the above-mentioned dilation structure.

[0019] The beneficial effect of the present application is that during the relative opening or closing of the upper expansion piece and the lower expansion piece, the two side expansion pieces can be driven to open or close synchronously through the sliding cooperation between the limit piece and the two side expansion pieces. The overall expansion structure is simple, easy to operate and has low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of the expansion structure in the embodiment in the open state;

[0022] Figure 2It is a structural schematic diagram of the closed state of the expansion structure in the embodiment;

[0023] Figure 3 It is a schematic diagram of the structure of the upper expansion member and the limiting member in the embodiment;

[0024] Figure 4 It is a structural schematic diagram of the lower expansion member in the embodiment;

[0025] Figure 5 It is a schematic diagram of the structure of the side expansion member and the lower expansion member in the embodiment;

[0026] Figure 6 In the embodiment Figure 3 Enlarged view of part A. DETAILED DESCRIPTION

[0027] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0028] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] As used herein, the term "substantially closed" and grammatically related terms refer to a relative structural arrangement of two objects where one object is perfectly positioned to be closed with the other object or where one object is positioned in a manner that is immediately recognizable as being closed with the other object, although not perfectly closed with the other object. A relative structural arrangement between two objects that is not perfectly closed but is immediately recognizable as closed due to acceptable tolerances suitable for manufacturing devices of the type described herein is considered to be substantially closed.

[0031] As used herein, the term "substantially circular" and grammatically related terms refer to a perfect circle or a shape that is not perfectly circular but is immediately recognizable as a circle. A cross-sectional shape that is not perfectly circular but is immediately recognizable as a circle due to acceptable tolerances suitable for manufacturing devices of the type described herein is considered to be substantially circular.

[0032] In order to further understand the content, features and effects of the present invention, the following embodiments are listed and described in detail with reference to the accompanying drawings:

[0033] Reference Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of the expansion structure in the embodiment in the open state, Figure 2 The expansion structure in the embodiment is a schematic diagram of the closed state. The expansion structure in this embodiment includes an upper expansion member 1, a lower expansion member 2, a stopper 3 and two side expansion members 4. The upper expansion member 1 is connected to the lower expansion member 2 and can rotate relative to each other. During the relative rotation, the two switch between the open and basically closed states. The stopper 3 is arranged on the upper expansion member 1 or the lower expansion member 2. The two side expansion members 4 are respectively rotatably connected to the opposite sides of the lower expansion member 2. During the relative opening of the upper expansion member 1 and the lower expansion member 2, one end of the two side expansion members 4 slides toward each other along the stopper 3, and the other end of the two side expansion members 4 is relatively opened. When in the open state, an inspection channel is formed between the upper expansion member 1, the lower expansion member 2 and the two side expansion members 4. During the relative closing of the upper expansion member 1 and the lower expansion member 2, one end of the two side expansion members 4 slides back to back along the stopper 3, and the other end of the two side expansion members 4 is relatively closed, and the two side expansion members 4 are retracted into the accommodation space formed after the upper expansion member 1 and the lower expansion member 2 are closed.

[0034] In the process of the upper expansion piece 1 and the lower expansion piece 2 being relatively opened or closed, the two side expansion pieces 4 can be driven to be opened or closed synchronously by the sliding cooperation between the stopper 3 and the two side expansion pieces 4, and the overall expansion structure is simple, easy to operate, and has low production cost. In this embodiment, there are two stoppers 3, and the two stoppers 3 are relatively arranged on the upper expansion piece 1, and one end of the two side expansion pieces 4 slides toward or away from the two stoppers 3 respectively.

[0035] Refer to Figure 3 , Figure 3Schematic diagram of the structure of the upper expansion member and the stopper in the embodiment. Further, the upper expansion member 1 includes an upper expansion section 11 and an inspection section 12, the inspection section 12 is connected to the upper expansion section 11, the inspection section 12 is connected to the lower expansion member 2 and can rotate relatively, and the inspection section 12 is formed with an inspection port 121, when in an open state, the inspection port 121 faces the inspection channel. The inspection port 121 is arranged to face the inspection channel, so that the doctor can directly or through other instruments through the inspection port 121 to perform inspection operations in the inspection channel.

[0036] Specifically, the cross section of the upper expansion section 11 is arc-shaped, and the side of the upper expansion section 11 facing away from the lower expansion member 2 is an arc surface. Preferably, the arc shape of the cross section of the upper expansion section 11 is semicircular, and the side of the upper expansion section 11 facing away from the lower expansion member 2 is a semicircular arc surface. The arc or semicircular shape of the surface of the upper expansion section 11 can avoid damage to the vagina during expansion. Preferably, a first entry head 111 is provided at the end of the upper expansion section 11. The first entry head 111 is an arc-shaped structure. The provision of the first entry head 111 can facilitate the upper expansion section 11 to enter the vagina, and also avoid damage to the vagina during opening. The first entry head 111 in this embodiment is a quarter of an ellipsoidal or spherical smooth shell, which is adapted to the upper expansion section 11, so as to be adaptively connected to the upper expansion section 11 as a whole.

[0037] The inspection section 12 is integrally connected to the upper expansion section 11. Specifically, the inspection section 12 includes a transition plate 123 and two side plates 124. One end of the transition plate 123 is integrally connected to the upper expansion section 11, and the two side plates 124 are respectively connected to the other end of the transition plate 123, and the transition plate 123 and the two side plates 124 cooperate to form an inspection port 121. Among them, the cross-section of the end of the transition plate 123 connected to the upper expansion section 11 is arc-shaped, so that the transition plate 123 can be adaptively connected to the upper expansion section 11 as a whole to form a smooth transition structure, which is convenient for protecting the vaginal opening, and the cross-section of the other end of the transition plate 123 away from the upper expansion section 11 is U-shaped, and the two side plates 124 are respectively connected to the opening ends of the U-shaped transition plate 123, so that the inspection port 121 formed by the transition plate 123 and the two side plates 124 is also U-shaped. Preferably, the side of the transition plate 123 facing away from the lower expansion member 2 has a curved position 1231, and the curved position 1231 is located at one end of the transition plate 123 close to the upper expansion section 111, and the arc angle of the curved position 1231 is an obtuse angle. The setting of the curved position 1231 facilitates the upper expansion section 11 and the lower expansion member 2 to close and form a basically closed state, and when the upper expansion section 11 and the lower expansion member 2 are opened to form an open state, the curved position 1231 can make the upper expansion section 11 open to the full extent, ensuring that the inspection channel has enough expansion space to complete the inspection. In addition, when the upper expansion section 11 and the lower expansion member 2 are in a basically closed state and enter the vagina, the transition plate 123 with the curved position 1231 can limit the depth of the upper expansion section 11 entering the vagina to avoid entering too deep.

[0038] Preferably, the upper expander 1 also includes a pressing portion 13, which is arranged at the inspection section 12, and a force is applied to the pressing portion 13, so that the pressing portion 13 drives the upper expander 1 and the lower expander 2 to rotate relative to each other, and two limiters 3 are relatively arranged at the pressing portion 13. When the pressing portion 13 drives the upper expander 1 and the lower expander 2 to rotate relative to each other, it will simultaneously act on the two side expanders 4 through the two limiters 3, so that one end of the two side expanders 4 slides toward or away from each other along the two limiters 3. The expansion linkage is realized by the cooperation of the pressing portion 13 and the two limiters 3, and the two limiters 3 act on the two side expanders 4 respectively, so as to realize the opening or closing of the side expanders 4, so as to realize the expansion linkage between the upper expander 1 and the side expander 4 with a simple structure, and the structure is simple and has high stability. In addition, the pressing portion 13 also increases the convenience of the doctor in controlling the relative rotation of the upper expander 1 and the lower expander 2, which is convenient for the formation of the inspection channel and improves the convenience of the expander operation. Specifically, the pressing portion 13 is located between the two side plates 124, one end of the pressing portion 13 is connected to the two side plates 124, and the other end thereof extends in a direction away from the transition plate 123. The pressing portion 13 in this embodiment is plate-shaped, and its two opposite side edges are integrally connected to the two side plates 124, respectively, so that the transition plate 123, the two side plates 124 and the pressing portion 13 cooperate to form the inspection port 121. Preferably, the angle at which the extension line of the pressing portion 13 intersects with the reverse extension line of the upper expansion section 11 is an obtuse angle. Preferably, the surface of the other end of the pressing portion 13 away from the transition plate 123 has anti-slip grooves to increase the friction when force is applied to the pressing portion 13, so as to avoid slipping when the doctor applies force to the pressing portion 13. The two stoppers 3 are relatively arranged on the surface of the pressing portion 13 facing the side expansion member 4. In this embodiment, the two stoppers 3 are arranged along the edge of the pressing portion 13. The edge of the pressing portion 13 here is the side edge when the pressing portion 13 cooperates with the transition plate 123 and the two side plates 124 to form the inspection port 121. One end of the two stoppers 3 is close to the opposite inner wall of the two side plates 124, and the other end of the two stoppers 3 extends toward each other. Preferably, one end of the two stoppers 3 is respectively integrally connected to the opposite inner wall of the two side plates 124, and the other end of the two stoppers 3 extends toward each other and faces each other.

[0039] Preferably, the upper expansion section 11 is made of highly transparent plastic, thereby ensuring the transparency of the upper expansion section 11 and avoiding interference with inspection. Preferably, the upper expansion section 11, the inspection section 12, the pressing portion 13 and the stopper 3 in this embodiment are integrally formed.

[0040] Refer to Figure 4 , Figure 4: is a schematic diagram of the structure of the lower expansion member in the embodiment. Furthermore, the lower expansion member 2 includes a lower expansion section 21 and a gripping portion 22, the gripping portion 22 has a connecting end 23, the connecting end 23 of the gripping portion 22 is connected to the lower expansion section 21, the inspection section 12 is connected to the connecting end 23 and can rotate relatively, and when in the open state, an inspection channel is formed between the upper expansion section 11 and the lower expansion section 21. The provision of the gripping portion 22 facilitates the doctor's hand-held operation of the expansion module 1. Specifically, the cross-section of the lower expansion section 21 is arc-shaped, and the side of the lower expansion section 21 facing away from the upper expansion section 11 is an arc surface. Preferably, the arc of the cross-section of the lower expansion section 21 is semicircular, and the side of the lower expansion section 21 facing away from the upper expansion section 11 is a semicircular arc surface. The arc or semicircular surface of the lower expansion section 21 can avoid damage to the vagina during expansion. Preferably, a second entry head 211 is provided at the end of the lower expansion section 21. The second entry head 211 is an arc-shaped structure. The second entry head 211 can facilitate the lower expansion section 21 to enter the vagina, and also avoid damage to the vagina during expansion. The second entry head 211 in this embodiment is a quarter of an elliptical spherical or spherical shell, which is adapted to the lower expansion section 21, so as to be adapted to be connected to the upper expansion section 11 as a whole. The lower expansion section 21 in this embodiment is adapted to the upper expansion section 11, and the two are basically closed after closing, and a accommodating space is formed between the two in the basically closed state, and the cross-sections of the two are basically circular. The basic circle in this embodiment can be a circle, a basically circular ellipse, or other basically circular shapes. The second entry head 211 is closed synchronously with the first entry head 111, and the two cooperate to form a half of an elliptical spherical or spherical shell. It can be understood that the lower expansion section 21 and the upper expansion section 11 can enter the vagina only when they are in a basically closed state. At this time, the first to enter the vagina are the second entry head 211 and the first entry head 111 in the closed state. The elliptical spherical or spherical shell shape formed by the second entry head 211 and the first entry head 111 facilitates the lower expansion section 21 and the upper expansion section 11 in a basically closed state to smoothly enter the vagina, avoiding vaginal damage and reducing the discomfort of the patient when being examined. The connecting end 23 is integrally connected to the lower expansion section 21. Specifically, the connecting end 23 includes a connecting plate 231 and two mounting plates 232. One end of the connecting plate 231 is integrally connected to the lower expansion section 21, and the other end of the connecting plate 231 is integrally connected to the gripping portion 22. The connecting plate 231 has a curved arc 2311 in the middle. The arrangement of the curved arc 2311 facilitates the shape matching of the lower expansion member 2 and the upper expansion member 1. The two mounting plates 232 are integrally connected to opposite sides of the connecting plate 231, and the two mounting plates 232 are close to the gripping portion 22. The two side plates 124 are located on the outer sides of the two mounting plates 232, and the side plates 124 and the mounting plates 232 are rotated by the rotation shaft and the shaft hole, so that the upper expansion member 1 and the lower expansion member 2 are connected and can rotate relative to each other.

[0041] Refer to Figure 5 , Figure 5 Schematic diagram of the structure of the side expansion member and the lower expansion member in the embodiment. Further, the side expansion member 4 includes a side expansion section 41, a rotating part 42 and a sliding part 43, the side expansion section 41 is connected to the sliding part 43, the sliding part 43 is slidably connected to the stopper 3, one end of the rotating part 42 is connected to the connection between the side expansion section 41 and the sliding part 43, and the other end of the rotating part 42 is rotatably connected to the lower expansion member 2, during the relative opening of the upper expansion member 1 and the lower expansion member 2, the two sliding parts 43 slide toward each other along the stopper 3, the two side expansion sections 41 are relatively opened, and an inspection channel is formed between the upper expansion member 1, the lower expansion member 2 and the two side expansion sections 41, during the relative closing of the upper expansion member 1 and the lower expansion member 2, the two sliding parts 43 slide back to back along the stopper 3, the two side expansion sections 43 are relatively closed, and the two side expansion sections 41 are retracted into the accommodation space formed after the upper expansion member 1 and the lower expansion member 2 are closed. In this embodiment, the upper expansion section 11, the lower expansion section 21 and the two side expansion sections 41 cooperate to form an inspection channel. The four-wing expansion is achieved by the upper expansion section 11, the lower expansion section 21 and the two side expansion sections 41, and the inspection channel formed is more convenient for inspection, and the side expansion structure formed by the side expansion section 41, the rotating part 42 and the sliding part 43 is simple. Specifically, the sliding part 43 is integrally formed with the side expansion section 41. The opposite sides of the two side expansion sections 41 are smooth arc surfaces, and the end of the side expansion section 41 away from the sliding part 43 is an arc surface structure, so that the side expansion section 41 can be prevented from causing damage to the vagina when the side expansion section 41 is opened to cooperate to form the inspection channel.

[0042] The rotating part 42 includes a rotating shaft 421 and an elastic clamping plate 422. One end of the rotating shaft 421 is connected to the connection between the side expansion section 41 and the sliding part 43, and the elastic clamping plate 422 is arranged at the other end of the rotating shaft 421. The two mounting plates 232 are respectively provided with rotating through holes 2321, and the two rotating through holes 2321 are arranged opposite to each other. The elastic clamping plate 422 passes through the rotating through holes 2321, so that the rotating through holes 2321 are sleeved outside the rotating shaft 421 and are rotatably connected to the rotating shaft 421. Specifically, the two rotating through holes 2321 are respectively opened on the two mounting plates 232, and the elastic clip plate 422 is integrally connected with the rotating shaft 421 along the axial direction of the rotating shaft 421. The elastic clip plate 422 has a barb structure. During assembly, the rotating shaft 421 integrally connected with the elastic clip plate 422 is directly passed through the rotating through hole 2321. In the process of the elastic clip plate 422 passing through the rotating through hole 2321, the inner wall of the rotating through hole 2321 will act on the barb structure, so that the elastic clip plate 422 is deformed toward the axial direction of the rotating shaft 421. After the elastic clip plate 422 passes through the rotating through hole 2321, the elastic clip plate 422 will reset to the outside of the rotating shaft 421. At this time, the barb structure will be buckled on the rotating through hole 2321 to limit the rotating shaft 421, so that the rotating shaft 421 is rotatably connected to the rotating through hole 2321. One end of the sliding portion 43 away from the side expansion section 41 extends toward the inspection port 121 and forms a sliding connection with the stopper 3 disposed on the pressing portion 13 .

[0043] Preferably, the sliding portion 43 has a limiting arc end 431, and the limiting arc end 431 is in sliding contact with the limiting member 3. The limiting arc end 431 is an end portion of the sliding portion 43 having an arc structure, and the setting of the limiting arc end 431 allows the sliding portion 43 to be more adapted to form a sliding fit relationship with the limiting member 3, thereby ensuring smooth sliding fit. In specific applications, the limiting arc end 431 is formed by the end portion of the sliding portion 43 being curved and extended toward the inspection port 121, and is adapted to form a sliding fit relationship with the limiting member 3 at the end.

[0044] The limiting arc ends 431 of the two sliding parts 43 are respectively in sliding contact with the two limiting members 3. When a force is applied to the pressing part 13, in the process of driving the upper expansion section 11 and the lower expansion section 21 to open relatively, the pressing part 13 acts on the limiting arc ends 431 of the two sliding parts 43 synchronously through the two limiting members 3, so that the two sliding parts 43 slide toward each other on the two limiting members 3, thereby driving the two side expansion sections 41 to open relatively. Conversely, in the process of the upper expansion section 11 and the lower expansion section 21 to close relatively, the limiting arc ends 431 of the two sliding parts 43 slide back to each other on the two limiting members 3, respectively, and the two side expansion sections 131 are relatively closed, and the two side expansion sections 131 will be closed first, and after forming a basically closed state, the upper expansion section 11 and the lower expansion section 21 will complete the closing action and form a basically closed state, so that the two side expansion sections 131 can be retracted into the accommodation space formed after the upper expansion section 11 and the lower expansion section 21 are closed. The limiting member 3 in this embodiment can be a sliding block.

[0045] Preferably, the side expansion member 4 further includes a reinforcement portion, which is arranged on the side expansion section 41 or / and the sliding section 43. By setting the reinforcement portion, the strength of the side expansion section 41 and the sliding section 43 is strengthened to ensure the strength when the side expansion section 41 performs an expansion action and the sliding section 43 performs a sliding action, and also ensure the strength of the side expansion section 131 and the sliding section 43 after the inspection channel is formed, thereby improving the stability of the inspection channel. In specific applications, the reinforcement portion can be a reinforcement rib or a reinforcement block, such as an "I"-shaped reinforcement block. When setting, the reinforcement portion can be set separately on the side expansion section 41 or the sliding section 43, or can be set separately on the side expansion section 41 and the sliding section 43. The reinforcement portion in this embodiment is a reinforcement rib, which is set along the length direction of the sliding section 43 and the side expansion section 41. Preferably, the reinforcement portion is integrally formed with the sliding section 43 and the side expansion section 41.

[0046] Refer to Figure 6 , Figure 6 In the embodiment Figure 3 The enlarged view of part A shows that, further, the limit member 3 is inclined from the outside of the inspection channel to the inside of the inspection channel. In this embodiment, the limit member 3 is inclined from the outside of the inspection port 121 to the inside of the inspection port 121. In this way, by setting the limit member 3 to be inclined from the outside to the inside, when the pressing portion 13 applies force, in the process of driving the upper expansion section 11 and the lower expansion section 21 to open relatively, the two limit members 3 act synchronously on the limit arc ends 431 of the two sliding portions 43 to slide more smoothly. In specific applications, the specific inclination angle of the limit member 3 can be set according to actual conditions, and the inclination angle of the limit member 3 from the outside of the inspection port 121 to the inside of the inspection port 121 is within 5 degrees.

[0047] Preferably, the stopper 3 has a first surface 31 and a second surface 32, the first surface 31 intersects with the second surface 32, the second surface 32 has a first end 321 and a second end 322, and the second surface 32 gradually approaches the first surface 31 during the extension process from the first end 321 to the second end 322, and the second surface 32 is in sliding contact with one end of the side expansion member 4. In this embodiment, the first surface 31 is a surface of the stopper 3 intersecting with the side edge of the surface of the pressing portion 13, wherein the surface of the pressing portion 13 is a surface of the pressing portion 13 facing away from the downward expansion member 2, and the second surface 32 is a surface of the stopper 3 intersecting with the first surface 31, and the second surface 32 extends approximately along the length direction of the stopper 3. The second surface 32 is in sliding contact with the stopper arc end 431 of the sliding portion 43. In this embodiment, the first end 321 is one end of the second surface 32 close to the integral connection between the stopper 3 and the side plate 124 , and the second end 322 is the other end of the second surface 32 away from the integral connection between the stopper 3 and the side plate 124 . It can be understood that when force is applied to the pressing portion 13, in the process of driving the upper expansion section 11 and the lower expansion section 21 to open relatively, the second surface 32 of the limiting member 3 is in sliding contact with the limiting arc end 431 of the sliding portion 43, and the second surface 32 will continue to act on the limiting arc end 431 of the sliding portion 43, so that the two side expansion sections 131 are relatively opened to form an inspection channel. In the process of forming the inspection channel, the vagina will unconsciously contract and act in the reverse direction on the upper expansion section 11, the lower expansion section 21 and the two side expansion sections 131, which will cause the side expansion section 131 to act in the reverse direction on the two limiting arc ends 431, so that the two limiting arc ends 431 have a reverse sliding tendency. In actual application, this reverse sliding tendency is offset by the doctor's hand applying force to the pressing portion 13, and the second surface 32 is limited from the first end 321 to the As the second end 322 extends, after the second surface 32 gradually approaches the first surface 31, the effect of the second surface 32 on the limiting arc end 431 will gradually increase, thereby limiting the reverse sliding tendency of the limiting arc end 431, and as the second surface 32 gradually approaches the first surface 31, the limiting angle of the second surface 32 on the limiting arc end 431 will gradually increase, and the restriction on the reverse sliding tendency of the limiting arc end 431 will become stronger and stronger, which can not only make the opening process of the two side expansion sections 131 smooth, but also gradually strengthen the restriction degree of the limiting arc end 431 of the limiting member 3 to resist the reverse effect of vaginal contraction, thereby avoiding the reverse sliding of the limiting arc end 431, ensuring that the opening process of the upper expansion section 11, the lower expansion section 21 and the two side expansion sections 131 is smooth, and can be smoothly opened to form an inspection channel.

[0048] Preferably, there is an avoidance position 33 between the two limiting members 3. In this embodiment, the gripping portion 22 also includes a bearing platform 221. The bearing platform 221 is located between the two mounting plates 232 and is integrally connected to the end of the gripping portion 22. During a specific examination, the doctor will use other medical devices to pass through the inspection port 121 and extend into the inspection channel for inspection. The bearing platform 221 can facilitate the carrying of other medical devices. The setting of the avoidance position 33 can avoid the bearing platform 221, and also make the entire expansion structure more compact. When other medical devices are arranged on the bearing platform 221, the medical devices are located above the limiting member 3 to avoid interference between other devices and the limiting member 3 in the cultivated position. The avoidance position 33 in this embodiment is specifically the interval space between the two limiting members 3.

[0049] This embodiment also discloses a four-wing vaginal dilator, which includes the above-mentioned expansion structure.

[0050] In summary, the expansion structure of the present invention realizes the linkage cooperation of the upper expansion section, the lower expansion section and the two side expansion sections through a simple sliding cooperation between the pressing part and the limit part, thereby realizing four-wing expansion. The overall structure is simple, which can reduce the cost of the four-wing vaginal dilator used as a consumable material and has a good market prospect.

[0051] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An expansion structure, characterized in that: include: Upper extension (1); A lower expansion piece (2), wherein the upper expansion piece (1) is connected to the lower expansion piece (2) and can rotate relative to each other, and during the relative rotation, the two pieces switch between an open state and a substantially closed state; Two limiting members (3), the two limiting members (3) being arranged opposite to the upper expansion member (1); and Two side expansion members (4), the two side expansion members (4) are respectively rotatably connected to opposite sides of the lower expansion member (2), one end of the two side expansion members (4) slides toward or away from the two limiting members (3), when the upper expansion member (1) and the lower expansion member (2) are relatively opened, one end of the two side expansion members (4) slides toward each other along the limiting members (3), and the other ends of the two side expansion members (4) are relatively opened. When in the opened state, an inspection channel is formed between the upper expansion member (1), the lower expansion member (2) and the two side expansion members (4), when the upper expansion member (1) and the lower expansion member (2) are relatively closed, one end of the two side expansion members (4) slides away from each other along the limiting members (3), and the other ends of the two side expansion members (4) are relatively closed, and the two side expansion members (4) are retracted into a receiving space formed after the upper expansion member (1) and the lower expansion member (2) are closed; The limiting member (3) comprises a first surface (31) and a second surface (32), the first surface (31) intersecting with the second surface (32), the second surface (32) comprising a first end (321) and a second end (322), and in the process of the second surface (32) extending from the first end (321) toward the second end (322), the second surface (32) gradually approaches the first surface (31), and the second surface (32) is slidably connected with one end of the side expansion member (4); the side expansion member (4) comprises a side expansion section (41), a rotating part (42) and a sliding part (43), the side expansion section (41) being connected with the sliding part (43), the sliding part (43) being slidably connected with the limiting member (3), and one end of the rotating part (42) being connected to the side expansion member (41). At the connection between the side expansion section (41) and the sliding section (43), the other end of the rotating section (42) is rotatably connected to the lower expansion member (2); during the relative opening of the upper expansion member (1) and the lower expansion member (2), the two sliding sections (43) slide towards each other along the limiting member (3), the two side expansion sections (41) are relatively opened, and an inspection channel is formed between the upper expansion member (1), the lower expansion member (2) and the two side expansion sections (41); during the relative closing of the upper expansion member (1) and the lower expansion member (2), the two sliding sections (43) slide away from each other along the limiting member (3), the two side expansion sections (43) are relatively closed, and the two side expansion sections (41) are retracted into a receiving space formed after the upper expansion member (1) and the lower expansion member (2) are closed; The sliding portion (43) has a limiting arc-shaped end (431), and the limiting arc-shaped end (431) is in sliding connection with the limiting member (3).

2. The expansion structure according to claim 1, characterized in that: The upper expansion piece (1) comprises an upper expansion section (11) and an inspection section (12), wherein the inspection section (12) is connected to the upper expansion section (11), and the inspection section (12) is connected to the lower expansion piece (2) and can rotate relative to each other, and the inspection section (12) is formed with an inspection opening (121), and when in an open state, the inspection opening (121) faces the inspection passage.

3. The expansion structure according to claim 2, characterized in that: The upper expansion member (1) further comprises a pressing portion (13), wherein the pressing portion (13) is arranged on the inspection section (12), and a force is applied to the pressing portion (13), so that the pressing portion (13) drives the upper expansion member (1) and the lower expansion member (2) to rotate relative to each other, and the two limiting members (3) are arranged relative to the pressing portion (13).

4. The expansion structure according to claim 1, characterized in that: The limiting member (3) is inclined from the outside of the inspection channel toward the inside of the inspection channel.

5. The expansion structure according to claim 1, characterized in that: An avoidance position (33) is provided between the two limiting members (3).

6. A four-wing vaginal dilator, characterized in that: It comprises the expansion structure described in any one of claims 1-5.

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