Four-wing vaginal dilator

Abstract

The four-wing vaginal dilator comprises an upper dilation piece and a lower dilation piece, the upper dilation piece and the lower dilation piece are rotationally connected, and the upper dilation piece can rotate to the dilation state relative to the lower dilation piece; the two side wings are rotatably connected to the two opposite sides of the lower expansion piece respectively; the locking piece is movably connected to the lower expansion piece, when the upper expansion piece rotates to the expansion state relative to the lower expansion piece, the locking piece is matched with the upper expansion piece so as to lock the upper expansion piece and the lower expansion piece, and meanwhile, the two side wings expand outwards and abut against the upper expansion piece. Under the driving of external force, the two side wings are driven to expand outwards while the upper expansion piece rotates relative to the lower expansion piece, and therefore four-wing expansion is achieved.

Description

Technical Field

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

[0002] Vaginal dilators are commonly used medical devices for gynecological examinations. Existing duckbill-shaped dilators often utilize a two-wing structure for dilation. However, the shape of these dilators, constrained by the upper and lower lobes, results in an elliptical or elongated shape, which can limit the field of view and hinder the doctor's examination.

[0003] While dilators with improved two-wing structures have emerged on the market, one type of existing four-wing vaginal dilator uses separate expansion of the upper and lower leaves and side wings, making it cumbersome and difficult for a single doctor to operate. Another type requires a complex linkage structure to achieve simultaneous expansion of the four wings, which is costly to manufacture and difficult to ensure the strength of the linkage structure. Summary of the Invention

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] The present application provides a four-wing vaginal dilator comprising:

[0006] An upper expander and a lower expander are rotatably connected to each other, and the upper expander can rotate relative to the lower expander to an expanded state;

[0007] Two side wings, the two side wings are rotatably connected to opposite sides of the lower expansion member;

[0008] The locking piece is movably connected to the lower expander. When the upper expander rotates relative to the lower expander to the expanded state, the locking piece cooperates with the upper expander to lock the upper expander and the lower expander. At the same time, the two side wings expand outward and abut against the upper expander.

[0009] In one embodiment, an elastic portion is provided between the side wings and the lower expansion member;

[0010] When the upper expansion member and the lower expansion member are in an expanded state, the elastic portion is elastically deformed;

[0011] When the upper expansion member and the lower expansion member are in a closed state, the deformed elastic portion recovers, and the two side wings are located in the accommodating cavity formed by the upper expansion member and the lower expansion member.

[0012] In one embodiment, the locking member has a locking tooth block, and the upper expansion member is provided with a limiting portion. The locking tooth block cooperates with the limiting portion to limit the upper expansion member from closing toward the lower expansion member.

[0013] In one embodiment, the locking tooth block has a blocking surface, and the limiting portion has at least two non-return side surfaces;

[0014] When the upper expansion member rotates relative to the lower expansion member to a first expansion angle, the blocking surface abuts against a non-return side surface in the limiting portion;

[0015] When the upper expansion member rotates relative to the lower expansion member to the second expansion angle, the blocking surface abuts against the other non-return side surface in the limiting portion.

[0016] In one embodiment, the limiting portion is provided with a clamping groove and a clamping block, the inner wall of the clamping groove is the first non-return side surface, and the side surface of the clamping block is the second non-return side surface;

[0017] The locking member is further provided with an inner groove, which is adjacent to the locking tooth block;

[0018] When the upper expansion member rotates relative to the lower expansion member to a first expansion angle, the locking tooth block is embedded in the slot;

[0019] When the upper expansion piece rotates relative to the lower expansion piece to a second expansion angle, the clamping block is embedded in the inner groove, and the second non-return side surface abuts against the blocking surface.

[0020] In one embodiment, the side wing has a terminal block, a transition block and an expansion block connected in sequence, and the transition block is provided with a rotating shaft block that cooperates with the lower expansion piece;

[0021] When the upper expansion piece and the lower expansion piece are in the expanded state, the end section block abuts against the stop portion of the upper expansion piece, and the expansion section block expands outwards.

[0022] In one embodiment, when the upper expander and the lower expander are in a closed state, the end block is separated from the stop portion of the upper expander.

[0023] In one embodiment, the stopper includes a limiting rail, and the end block slides on the limiting rail.

[0024] In one embodiment, the blocking portion further includes an avoidance notch, and the avoidance notch is provided on the limiting rail;

[0025] When the upper expansion member rotates relative to the lower expansion member to a first expansion angle, the end block abuts against the limit rail;

[0026] When the upper expansion member rotates relative to the lower expansion member to the second expansion angle, the end block abuts against the avoidance gap.

[0027] In one embodiment, the locking member includes a second pressing portion and a swing arm portion, the swing arm portion is rotatably connected to the lower expansion member, and the second pressing portion and the locking tooth blocks are arranged at both ends of the swing arm portion;

[0028] The distance from the second pressing portion to the rotation axis of the swing arm portion is greater than the distance from the locking tooth block to the rotation axis of the swing arm portion.

[0029] This application has at least the following beneficial effects:

[0030] In the present application, by pressing the upper expander, the upper expander rotates relative to the lower expander. At the same time, the rotating upper expander can also drive the side wings to rotate, and the side wings expand outward, thereby achieving the simultaneous expansion of the four wings of the four-wing vaginal expander to improve the expansion effect of the expander.

[0031] In addition, the locking piece is used in conjunction with the upper expander to lock the expansion angle of the upper expander and the lower expander. After locking the expansion angle of the upper expander and the lower expander, the relative rotation of the upper expander and the lower expander is restricted. At the same time, the upper expander rests on the side wings, so that the side wings also maintain an outward expansion angle, so that the four wings are stably opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the three-dimensional structure of a four-wing vaginal dilator provided in one embodiment of the present application.

[0033] Figure 2 This is an exploded schematic diagram of a four-wing vaginal dilator provided in one embodiment of the present application.

[0034] Figure 3 A schematic diagram of the three-dimensional structure of an upper expansion member provided in one embodiment of the present application.

[0035] Figure 4 A schematic diagram of the partial structure of the lower expansion member provided in one embodiment of the present application.

[0036] Figure 5 A schematic diagram of the three-dimensional structure of the second side wing portion provided in one embodiment of the present application.

[0037] Figure 6 A schematic diagram of the three-dimensional structure of the elastic portion provided in one embodiment of the present application.

[0038] Figure 7 This is a schematic diagram of the three-dimensional structure of the four-wing vaginal dilator provided in one embodiment of the present application when it is opened to a first expansion angle.

[0039] Figure 8 This is a cross-sectional view of a four-wing vaginal dilator provided by one embodiment of the present application at a first expansion angle.

[0040] Figure 9 This is a schematic diagram of the upper expansion member and the side wing member provided in an embodiment of the present application at a first expansion angle.

[0041] Figure 10 for Figure 9 A local enlarged schematic diagram of point A in the middle.

[0042] Figure 11This is a schematic diagram of the upper expansion member and the locking member provided in an embodiment of the present application at a first expansion angle.

[0043] Figure 12 for Figure 11 A partial enlarged schematic diagram of point B in the middle.

[0044] Figure 13 This is a schematic diagram of the three-dimensional structure of the four-wing vaginal dilator provided in one embodiment of the present application at the second expansion angle.

[0045] Figure 14 This is a cross-sectional view of the four-wing vaginal dilator provided in one embodiment of the present application at the second expansion angle.

[0046] Figure 15 This is a schematic diagram of the upper expansion member and the side wing member provided in an embodiment of the present application at a second expansion angle.

[0047] Figure 16 for Figure 15 A partial enlarged schematic diagram of point C in the middle.

[0048] Figure 17 This is a schematic diagram of the upper expansion member and the locking member provided in an embodiment of the present application at a second expansion angle.

[0049] Figure 18 for Figure 17 A local enlarged schematic diagram of point D in the middle.

[0050] Reference numerals:

[0051] 1. Upper expansion piece;

[0052] 11. Upper beak; 12. Inspection portion; 13. First pressing portion; 14. First rotation axis; 15. Limiting portion;

[0053] 121. Limit rail; 122. Avoid gap;

[0054] 151. Card slot; 152. Card connection block; 153. Sliding side;

[0055] 1511, first non-return side;

[0056] 1521, second non-return side;

[0057] 2. Lower expansion piece;

[0058] 21. Lower beak; 22. Gripping part;

[0059] 221, first axial hole; 222, second axial hole; 223, slide rail; 224, first stopper; 225, ramp;

[0060] 2251, third axis hole;

[0061] 3. Locking parts;

[0062] 31. Second pressing portion; 32. Swing arm portion;

[0063] 311, second stopper;

[0064] 321, second rotating shaft; 322, locking tooth block; 323, inner groove;

[0065] 3221, blocking surface;

[0066] 4. Side wing pieces;

[0067] 41. First side wing; 42. Second side wing; 43. Elastic portion;

[0068] 421, end block; 422, transition block; 423, expansion block; 424, rotating shaft; 425, pin hole;

[0069] 431, first limiting end; 432, elastic shaft section; 433, second limiting end. DETAILED DESCRIPTION

[0070] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0071] In the description of this application, it should be understood that if the terms "length", "width", "thickness", "up", "down", "vertical", "inside", "outside", "axial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0072] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically specified.

[0073] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediary; they can refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0074] In this application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0075] It should be noted that if an element is referred to as being "fixed to," "disposed on," or "located on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0076] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0077] Reference Figure 1 As shown, in some embodiments of the present application, a four-wing vaginal dilator is provided, comprising: an upper dilator 1, a lower dilator 2, a locking member 3, and side wings 4. The upper dilator 1, locking member 3, and side wings 4 are respectively rotatably connected to the lower dilator 2, so that the upper dilator 1, lower dilator 2, locking member 3, and side wings 4 form an integral structure. In the process of external force driving the upper dilator 1 to rotate relative to the lower dilator 2, the upper dilator 1 abuts against the side wings 4. As the upper dilator 1 moves, the side wings 4 are forced to rotate relative to the lower dilator 2, and the side wings 4 expand outward. The side wings 4 include two wings. By applying force to the upper dilator 1, the four wings of the upper dilator 1, lower dilator 2, and side wings 4 are synchronously opened, simplifying the operation difficulty and conforming to the doctor's usage habits.

[0078] When the upper expander 1 and the lower expander 2 are expanded to a predetermined angle, force is applied to the locking member 3, causing the locking member 3 to rotate relative to the lower expander 2 until the locking member 3 and the upper expander 1 are locked, thereby maintaining the expanded angle (i.e., the predetermined angle) of the upper expander 1 and the lower expander 2. Simultaneously, the upper expander 1 remains in contact with the side wings 4, and the side wings 4 are expanded outward. Specifically, the side wings 4 extend outward by extending through the gap between the upper expander 1 and the lower expander 2.

[0079] Specifically, combined Figure 2-4 As shown, the upper expander 1 includes an upper beak portion 11, an inspection portion 12, and a first pressing portion 13, which are sequentially connected to form the main structure of the upper expander 1. The lower expander 2 includes a lower beak portion 21 and a gripping portion 22. The upper beak portion 11 and the lower beak portion 21 are arranged opposite each other. The upper beak portion 11 and the lower beak portion 21 are the parts that extend into the patient's body to achieve the purpose of expansion or closing. The cross-section of the upper beak portion 11 and the lower beak portion 21 is arc-shaped. When closed, the overall outline of the upper beak portion 11 and the lower beak portion 21 presents a circular, elliptical, or olive shape.

[0080] The side wing member 4 includes a first side wing 41 and a second side wing 42, which are rotatably connected to opposite sides of the lower expander 2. More specifically, the first side wing 41 and the second side wing 42 are rotatably connected to the grip portion 22 and are symmetrically arranged. The upper expander 1 and the lower expander 2 are closed to form a receiving cavity, and the first side wing 41 and the second side wing 42 are located within the receiving cavity.

[0081] The inspection portion 12 is provided with a first rotation axis 14, and the grip portion 22 is provided with a first axial hole 221 adapted to the first rotation axis 14. The first rotation axis 14 is mounted in the first axial hole 221, thereby achieving a rotational connection between the upper expander 1 and the lower expander 2. By pressing the first pressing portion 13, the first pressing portion 13 rotates toward the grip portion 22, causing the upper beak 11 and the lower beak 21 to open. The locking member 3 includes a second pressing portion 31 and a swing arm portion 32. The swing arm portion 32 is connected to the second pressing portion 31, allowing an operator to apply force to the second pressing portion 31. The swing arm portion 32 is movably connected to the grip portion 22.

[0082] The locking member 3 and the upper expander 1 form a locking structure. Specifically, the inspection portion 12 is provided with a limit portion 15, and the swing arm portion 32 is provided with a locking tooth block 322. The limit portion 15 cooperates with the locking tooth block 322 to limit the upper expander 1 and the lower beak portion 21 from closing. Figure 7-18As shown, preferably, the limiting portion 15 has at least one non-return side surface (1511, 1521), and the locking tooth block 322 has a blocking surface 3221. When the upper expander 1 rotates relative to the lower expander 2 to open to a predetermined angle, the locking member 3 moves relative to the lower expander 2 until the non-return side surface (1511, 1521) abuts against the blocking surface 3221. The non-return side surface (1511, 1521) abuts against the blocking surface 3221, and the locking member 3 blocks the movement path of the upper expander 1 when closing. When a force is applied to the locking member 3, the limiting portion 15 is kept in cooperation with the locking tooth block 322, so that the upper expander 1 and the lower expander 2 maintain the opening angle.

[0083] After the upper expander 1 and the lower expander 2 are closed, the limiting portion 15 separates from the locking tooth block 322. More specifically, when the force on the locking member 3 is removed, the upper expander 1 is subjected to the contraction force, and the upper expander 1 and the lower expander 2 tend to close together. At this time, the limiting portion 15 moves, driving the locking tooth block 322 to separate from the limiting portion 15, thereby releasing the locking structure between the locking member 3 and the upper expander 1. In fact, in this embodiment, the upper expander 1 is closed with the lower expander 2 due to its own weight, and the non-return side surfaces (1511, 1521) are not in contact with the blocking surface 3221. At this time, the upper expander 1 can be opened arbitrarily relative to the lower expander 2.

[0084] In this embodiment, a second rotation axis 321 is provided on the swing arm portion 32, and a second axial hole 222 is formed on the grip portion 22 to mate with the second rotation axis 321. The second rotation axis 321 is installed in the second axial hole 222 to achieve a rotational connection between the locking member 3 and the lower expander 2. A locking tooth block 322 is provided on the swing arm portion 32. More specifically, the locking tooth block 322 is positioned near the second rotation axis 321. When the locking member 3 rotates relative to the lower expander 2, the locking tooth block 322 abuts against or separates from the stop portion 15.

[0085] On one hand, the locking member 3 is movable relative to the lower expander 2 , and the locking tooth block 322 cooperates with the limiting portion 15 to apply force to the locking member 3 to limit the relative position of the locking member 3 and the upper expander 1 . The locking member 3 is locked with the upper expander 1 and continuously applies force to the locking member 3 to maintain the upper expander 1 and the lower expander 2 in an open state. When the force applied to the locking member 3 is removed, the upper expander 1 and the lower expander 2 are forced to shrink, and the area where the non-return side surface (1511, 1521) contacts the blocking surface 3221 gradually decreases until the locking member 3 is separated from the upper expander 1. In this process, since there is no supporting force corresponding to the upper expander 1 on the locking member 3, there is no mutually offsetting force between the locking parts of the locking member 3 and the upper expander 1 (i.e., the limiting portion 15 and the locking tooth block 322). When the area where the non-return side surface (1511, 1521) contacts the blocking surface 3221 gradually decreases, the pressure on it is small, and it is not easy to cause fatigue damage to the limiting portion 15 and the locking tooth block 322.

[0086] On the other hand, the locking tooth block 322 is a frustum, one side of which is a blocking surface 3221. Compared with the tips of existing ratchets that are easily broken, the frustum has a larger cross-sectional area, making the locking tooth block 322 stronger and extending its service life under the influence of reaction force.

[0087] It should be pointed out that in this solution, the upper beak portion 11, the inspection portion 12, the first pressing portion 13, the first rotating shaft 14 and the limiting portion 15 are integrally formed, which simplifies the structure while ensuring structural strength.

[0088] In some embodiments of the present application, the number of predetermined angles is consistent with the number of non-return side surfaces (1511, 1521), and when the upper expander 1 rotates relative to the lower expander 2 to open to any predetermined angle, the corresponding non-return side surface (1511, 1521) abuts against the blocking surface 3221. That is, the upper expander 1 and the lower expander 2 can maintain a plurality of different opening angles.

[0089] Exemplarily, the limiting portion 15 has a first non-return side surface 1511 and a second non-return side surface 1521, so that the upper expander 1 and the lower expander 2 can maintain their opening at two predetermined angles. The predetermined angles include a first expansion angle and a second expansion angle. In this specific embodiment, the limiting portion 15 is provided with a card slot 151 and a card block 152, the card slot 151 has a first non-return side surface 1511, and the card block 152 has a second non-return side surface 1521. When the upper expander 1 and the lower expander 2 are opened to the first expansion angle or the second expansion angle, the blocking surface 3221 abuts against the first non-return side surface 1511 or the second non-return side surface 1521 to limit the upper expander 1 and the lower expander 2 from closing, as follows:

[0090] like Figure 7-12 As shown, when the upper expander 1 and the lower expander 2 are opened to the first expansion angle, the first non-return side surface 1511 abuts against the blocking surface 3221. At this time, the second pressing portion 31 abuts against the lower expander 2. In this embodiment, a second stopper 311 is provided on the second pressing portion 31.

[0091] The second pressing portion 31 resting against the lower expander 2 includes: a second stopper 311 pressed against the outer wall of the lower expander 2. The second stopper 311 on the second pressing portion 31 is pressed against the outer wall of the lower expander 2 by an external force, limiting the relative position of the locking portion 3 and the lower expander 2. At the same time, the locking portion 3 and the upper expander 1 cooperate with the locking tooth block 322 through the limiting portion 15, so that the locking portion 3 and the upper expander 1 are positioned relative to each other, thereby maintaining the relative position relationship between the locking portion 3, the upper expander 1 and the lower expander 2, that is, the upper expander 1 and the lower expander 2 are maintained at the first expansion angle. When the upper expander 1 and the lower expander 2 are opened to the first expansion angle, the operator holds the second pressing portion 31 and the gripping portion 22 with one hand at the same time, so that the second pressing portion 31 and the gripping portion 22 are fixed in position.

[0092] At the same time, if Figure 13-18 As shown, when the upper expander 1 and the lower expander 2 are opened to the second expansion angle, the second non-return side surface 1521 abuts against the blocking surface 3221. At this time, the first pressing portion 13 abuts against the lower expander 2. In this specific embodiment, the locking member 3 is further provided with an inner groove 323, which is adjacent to the locking tooth block 322. When the upper expander 1 and the lower expander 2 are opened to the second expansion angle, the second non-return side surface 1521 abuts against the blocking surface 3221, and the clamping block 152 is embedded in the inner groove 323. With the clamping block 152 embedded in the inner groove 323, the locking member 3 and the upper expander 1 are pre-positioned, making the connection between the locking member 3 and the upper expander 1 more stable. In this solution, the first pressing portion 13 abuts against the gripping portion 22 of the lower expander 2.

[0093] A raised first stop 224 is provided on the outer wall of the gripping portion 22. When the upper expander 1 and the lower expander 2 are opened to the second expansion angle, the first pressing portion 13 abuts against the first stop 224. The locking member 3 is positioned adjacent to the gripping portion 22. When the upper expander 1 and the lower expander 2 are opened to the second expansion angle, the operator simultaneously grasps the first pressing portion 13 and the second pressing portion 31 with one hand. At this point, the first pressing portion 13 and the second pressing portion 31 press against the gripping portion 22, thereby maintaining the relative positions of the locking member 3, the upper expander 1, and the lower expander 2 fixed.

[0094] Furthermore, the relationship between the first expansion angle α1 and the second expansion angle α2 is specifically α1<α2. In this solution, the upper expansion member 1 and the lower expansion member 2 are opened at different angles to meet different detection requirements.

[0095] In some embodiments of the present application, the grip portion 22 is provided with a curved slide rail 223. In this embodiment, the slide rail 223 is located between the first axial hole 221 and the second axial hole 222. The slide rail 223 is a curved track arranged concentrically with the first axial hole 221. The limiting portion 15 has a sliding side surface 153 that mates with the slide rail 223. The sliding side surface 153 is a curved surface, and the limiting portion 15 can slide along the slide rail 223. The limiting portion 15 and the slide rail 223 can limit the rotation angle of the lower expander.

[0096] In some embodiments of the present application, reference is made to Figure 4-6 As shown, an elastic portion 43 is provided between the side wing and the lower expander 2. The elastic portion 43 includes a first limiting end 431, an elastic shaft section 432, and a second limiting end 433, which are sequentially connected in a straight line. The first limiting end 431 is fixedly connected to the side wing, and the second limiting end 433 is fixedly connected to the gripping portion 22 of the lower expander 2. In this embodiment, a limiting hole and a pin hole 425 are respectively provided on the gripping portion 22 and the side wing. To facilitate the elastic deformation of the elastic shaft section 432, the limiting hole and the pin hole 425 are polygonal in shape. The cross-sectional shapes of the first limiting end 431 and the second limiting end 433 are consistent with those of the limiting hole and the pin hole 425. When the upper expander 1 and the lower expander 2 are in the expanded state, the elastic shaft section 432 of the elastic portion 43 is elastically deformed due to the rotation of the side wing relative to the lower expander 2. When the upper expander 1 and the lower expander 2 are in the closed state, the deformed elastic portion 43 restores the side wings to their original positions, and the two side wings return to the accommodating cavity formed by the upper expander 1 and the lower expander 2 .

[0097] The side wings have an end block 421, a transition block 422, and an expansion block 423, which are connected in sequence. The transition block 422 is provided with a pivot block 424 that cooperates with the lower expander 2. During use, the end block 421 is located on the end closest to the doctor, and the expansion block 423 is located on the end closest to the patient. When the upper expander 1 and the lower expander 2 are in the expanded state, the end block 421 abuts against the stop portion of the upper expander 1. The end block 421 moves downward due to the force of the upper expander 1. At the same time, the side wings are restricted by the pivot block 424, causing the side wings to rotate and the expansion block 423 to expand outward. When the upper expander 1 and the lower expander 2 are in the closed state, the expansion block 423 is located in the space formed by the upper beak 11 and the lower beak 21.

[0098] In this embodiment, a ramp 225 is provided within the grip portion 22. An elastic portion 43 extends from the top surface of the ramp 225 and connects to the side wings. The bottom surface of the side wings mates with the top surface of the ramp 225. The axis of the elastic portion 43 is perpendicular to the top surface of the ramp 225. The distance between the first limiting ends 431 of the two elastic portions 43 is smaller than the distance between the second limiting ends 433 of the two elastic portions 43. The side wings rotate about the axis of the elastic portion 43, causing the expansion segments 423 of the side wings to rotate diagonally upward. As the expansion angle of the upper expander 1 and the lower expander 2 gradually increases, the end block 421 gradually moves downward, causing the expansion block 423 of the side wing to gradually rotate diagonally upward. While the expansion angle of the expansion block 423 of the side wing gradually increases, the expansion block 423 is always in the middle position of the opening formed by the upper beak 11 and the lower beak 21. The gaps between the upper beak 11, the lower beak 21 and the expansion block 423 are roughly the same, ensuring the uniformity of lateral shielding.

[0099] In addition, during the opening process, the expansion segment 423 rotates diagonally upward. In the closed state, the expansion segment 423 is located in the space formed by the upper beak 11 and the lower beak 21. The diagonal rotation of the expansion segment 423 effectively reduces daily bumps and increases service life.

[0100] Furthermore, when the upper expander 1 and the lower expander 2 are in the closed state, the end block 421 is separated from the stop portion of the upper expander 1. When the upper expander 1 and the lower expander 2 are in the closed state, the elastic portion 43 returns to a state free from deformation force, thereby preventing the elastic portion 43 from being in a deformed state for a long time when the four-wing vaginal dilator is not in use, thereby preventing damage to the elastic portion 43.

[0101] In this embodiment, the stopper includes a limit rail 121, and the end block 421 slides on the limit rail 121. Specifically, the contact between the end block 421 and the limit rail 121 is point contact, and the side of the end block 421 facing the limit rail 121 is an arc surface, which reduces the contact area between the end block 421 and the limit rail 121, reduces friction, and makes the flank expansion smoother.

[0102] Furthermore, the stopper also includes an escape notch 122, which is provided on the limit rail 121. In this embodiment, the escape notch 122 is located at the center of the limit rail 121, and the limit rail 121 is divided into two sections by the escape notch 122. When the upper expander 1 is opened relative to the lower expander 2, the end block 421 abuts against the stopper, specifically:

[0103] When the upper expander 1 rotates relative to the lower expander 2 to the first expansion angle, the two end blocks 421 respectively abut against the two sub-rails.

[0104] When the upper expansion member 1 rotates relative to the lower expansion member 2 to the second expansion angle, the two end blocks 421 abut against the avoidance gap 122 .

[0105] In this embodiment, when the upper expander 1 is at its first expansion angle, the end block 421 abuts against the sub-rail. When the upper expander 1 is at its second expansion angle, the end block 421 abuts against the sub-rail. Furthermore, when the upper expander 1 is at its second expansion angle, the sub-rail recess 122 assists in limiting the position of the side wings. Furthermore, the sub-rail recess 122 allows the upper expander 1 to rotate relative to the lower expander 2 to achieve a larger second expansion angle.

[0106] The above embodiments are used to further illustrate the present application, but do not limit the present application to these specific embodiments. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be understood to be within the scope of protection of the present application.

Claims

1. A four-wing vaginal dilator, characterized in that: include: An upper expansion member (1) and a lower expansion member (2), wherein the upper expansion member (1) and the lower expansion member (2) are rotatably connected, and the upper expansion member (1) can be rotated relative to the lower expansion member (2) to an expanded state; Two side wings (41, 42), the two side wings (41, 42) are rotatably connected to opposite sides of the lower expansion member (2); A locking member (3) is movably connected to the lower expander (2). When the upper expander (1) rotates relative to the lower expander (2) to an expanded state, the locking member (3) cooperates with the upper expander (1) to lock the upper expander (1) and the lower expander (2). At the same time, the two side wings (41, 42) are unfolded outward and abut against the upper expander (1).

2. The four-wing vaginal dilator according to claim 1, characterized in that: An elastic portion (43) is provided between the side wings (41, 42) and the lower expansion member (2); When the upper expansion member (1) and the lower expansion member (2) are in an expanded state, the elastic portion (43) elastically deforms; When the upper expansion piece (1) and the lower expansion piece (2) are in a closed state, the deformed elastic portion (43) is restored, and the two side wings (41, 42) are located in the accommodating cavity formed by the upper expansion piece (1) and the lower expansion piece (2).

3. The four-wing vaginal dilator according to claim 2, characterized in that: The locking member (3) is provided with a locking tooth block (322), and the upper expansion member (1) is provided with a limiting portion (15). The locking tooth block (322) cooperates with the limiting portion (15) to limit the upper expansion member (1) from closing toward the lower expansion member (2).

4. The four-wing vaginal dilator according to claim 3, characterized in that: The locking tooth block (322) has a blocking surface (3221), and the limiting portion (15) has at least two non-return side surfaces (1511, 1521); When the upper expansion member (1) rotates relative to the lower expansion member (2) to a first expansion angle, the blocking surface (3221) abuts against one of the non-return side surfaces (1511, 1521) in the limiting portion (15); When the upper expansion member (1) rotates to a second expansion angle relative to the lower expansion member (2), the blocking surface (3221) abuts against the other non-return side surface (1511, 1521) in the limiting portion (15).

5. The four-wing vaginal dilator according to claim 4, characterized in that: The limiting portion (15) is provided with a clamping groove (151) and a clamping block (152); the inner wall of the clamping groove (151) is a first non-return side surface (1511), and the side surface of the clamping block (152) is a second non-return side surface (1521); The locking member (3) further comprises an inner groove (323), wherein the inner groove (323) is adjacent to the locking tooth block (322); When the upper expansion member (1) rotates relative to the lower expansion member (2) to the first expansion angle, the locking tooth block (322) is embedded in the slot (151); When the upper expansion member (1) rotates relative to the lower expansion member (2) to the second expansion angle, the clamping block (152) is embedded in the inner groove (323), and the second non-return side surface (1521) abuts against the blocking surface (3221).

6. The four-wing vaginal dilator according to claim 4, characterized in that: The side wings (41, 42) have an end section block (421), a transition section block (422), and an expansion section block (423) connected in sequence, and the transition section block (422) is provided with a rotating shaft block (424) that is matched with the lower expansion member (2); When the upper expansion member (1) and the lower expansion member (2) are in an expanded state, the end segment block (421) abuts against the stop portion of the upper expansion member (1), and the expansion segment block (423) expands outward.

7. The four-wing vaginal dilator according to claim 6, characterized in that: When the upper expansion piece (1) and the lower expansion piece (2) are in a closed state, the end block (421) is separated from the stop portion of the upper expansion piece (1).

8. The four-wing vaginal dilator according to claim 6, characterized in that: The blocking portion comprises a limiting rail (121), and the end block (421) slides on the limiting rail (121).

9. The four-wing vaginal dilator according to claim 7, characterized in that: The blocking portion further includes an avoidance notch (122), and the avoidance notch (122) is provided on the limiting rail (121); When the upper expansion member (1) rotates relative to the lower expansion member (2) to the first expansion angle, the end block (421) abuts against the limit rail (121); When the upper expansion member (1) rotates relative to the lower expansion member (2) to the second expansion angle, the end block (421) abuts against the avoidance gap (122).

10. The four-wing vaginal dilator according to claim 3, characterized in that: The locking member (3) comprises a second pressing portion (31) and a swing arm portion (32), wherein the swing arm portion (32) is rotatably connected to the lower expansion member (2), and the second pressing portion (31) and the locking tooth block (322) are arranged at both ends of the swing arm portion (32); The distance between the second pressing portion (31) and the rotation axis of the swing arm portion (32) is greater than the distance between the locking tooth block (322) and the rotation axis of the swing arm portion (32).

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