Vaginal dilator

Abstract

The vaginal dilator comprises an upper dilation piece, a lower dilation piece and a locking piece, the upper dilation piece and the lower dilation piece are rotationally connected, the upper dilation piece comprises a limiting part, and the limiting part is provided with at least two non-return side faces; the locking piece is provided with a blocking surface; when the upper expansion piece rotates to a first expansion angle relative to the lower expansion piece, the blocking face abuts against one non-return side face in the limiting part. When the upper expansion piece rotates to a second expansion angle relative to the lower expansion piece, the blocking face abuts against the other non-return side face in the limiting part. Any one of the multiple non-return side faces on the limiting part abuts against the blocking face, and the upper expansion piece and the lower expansion piece can be stably opened at multiple angles.

Description

Technical Field

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

[0002] Vaginal dilators are commonly used medical devices for gynecological examinations. Because vaginal dilators need to remain open during use, existing vaginal dilators utilize a locking member and a locking element to maintain this expanded state. Specifically, the locking member has a locking position. The locking member includes a locking carrier, a toggle member, and a one-way locking member. The toggle member is rotatably connected to the locking carrier, and the one-way locking member is disposed on the toggle member. The one-way locking member is adapted to the locking position. When a force is applied to the toggle member, the toggle member drives the one-way locking member to and from the locking position. When connected, the one-way locking member and the locking position undergo one-way relative movement. When the one-way locking member is connected to the locking position, the lower and upper expansion modules are relatively open. Since only one-way relative movement is permitted between the one-way locking member and the locking position, even under the reverse effect of involuntary vaginal contractions, the lower and upper expansion modules can remain open, ensuring the safety of subsequent gynecological examinations.

[0003] The one-way locking portion includes a one-way bearing and a gear. The one-way bearing is located in the locking bearing position, and the gear is mounted on the one-way bearing. The gear is sequentially provided with a plurality of first meshing teeth along the circumference of the gear. The locking position includes a plurality of second meshing teeth sequentially arranged along the length of the locking member. The first meshing teeth are adapted to the second meshing teeth and can engage or disengage with each other. The first meshing teeth and the second meshing teeth are ratchet teeth with opposite inclination directions.

[0004] However, in actual use, it has been found that the ratchet teeth of existing vaginal dilators are prone to breaking due to fatigue after a period of use. Analysis has found that during the expansion process of existing vaginal dilators, the first and second meshing teeth remain in a state of constant meshing. However, the contraction resistance during the expansion process acts on the first and second meshing teeth in the meshing state. As the first and second meshing teeth rotate, the contact area between the first and second meshing teeth also changes, causing the contact area between the first and second meshing teeth to gradually decrease. In addition, due to the structure of the ratchet teeth, the tip of the ratchet teeth is weak and more prone to breakage.

[0005] Although the strength can be improved by adjusting the materials of the first meshing teeth and the second meshing teeth, there are still several problems. First, considering safety, the vaginal dilator needs to invade the human body, and the material itself is required to meet safety standards. The vaginal dilator will not induce adverse reactions after invading the patient's body; second, considering user experience, metal materials have high strength, but low specific heat capacity. When invading the human body, the surface temperature of the vaginal dilator is difficult to maintain consistent with the patient's body temperature, resulting in the patient feeling too cold or too hot when the vaginal dilator invades the human body, which can easily cause stress rejection in the patient; finally, considering the processing difficulty, only the material of the meshing teeth can be changed, but when the materials used for the meshing teeth and the upper expansion module are inconsistent, the meshing teeth and the upper expansion module are difficult to obtain using an integrated molding process, which increases the process of connecting and assembling the meshing teeth and the upper expansion module, and the strength of the connection between the meshing teeth and the upper expansion module is difficult to guarantee. Summary of the Invention

[0006] In order to solve the above technical problems, this application provides the following technical solutions:

[0007] The present application provides a vaginal dilator comprising:

[0008] An upper expander and a lower expander, the upper expander and the lower expander are rotatably connected, the upper expander includes a limit portion, and the limit portion has at least two non-return side surfaces; and

[0009] The locking piece has a blocking surface; when the upper expansion piece rotates to a first expansion angle relative to the lower expansion piece, the blocking surface abuts against a non-return side surface in the limiting portion; when the upper expansion piece rotates to a second expansion angle relative to the lower expansion piece, the blocking surface abuts against another non-return side surface in the limiting portion.

[0010] In one embodiment, the locking member includes a locking tooth block, and the blocking surface is provided on the locking tooth block.

[0011] In one embodiment, the locking member includes a second pressing portion and a swing arm portion provided with a locking tooth block, and the swing arm portion is rotatably connected to the lower expansion member;

[0012] 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.

[0013] 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.

[0014] In one embodiment, when the upper expansion member and the lower expansion member are opened to the first expansion angle, the second pressing portion abuts against the lower expansion member.

[0015] In one embodiment, a second stopper is provided on the second pressing portion, and when the upper expansion member and the lower expansion member are opened to the first expansion angle, the second stopper is pressed against the outer wall of the lower expansion member.

[0016] In one embodiment, the upper expander has a first pressing portion. When the upper expander and the lower expander are opened to the second expansion angle, the first pressing portion abuts against the lower expander.

[0017] In one embodiment, the locking member is further provided with an inner groove adjacent to the locking tooth block. When the upper expansion member and the lower expansion member are opened to the second expansion angle, the second non-return side abuts against the blocking surface, and the snap-fit ​​block is embedded in the inner groove.

[0018] In one embodiment, the upper expansion member has an upper expansion portion and an inspection portion, and the lower expansion member has a lower expansion portion and a gripping portion arranged opposite to the upper expansion portion. The gripping portion is rotatably connected to the inspection portion, and the upper expansion portion and the lower expansion portion are opened or closed.

[0019] In one embodiment, the gripping portion is provided with an arc-shaped slide rail, the limiting portion has an inner arc surface that fits the slide rail, and the limiting portion slides along the slide rail.

[0020] This application has at least the following beneficial effects:

[0021] In this application, the limiting portion of the upper expander cooperates with the locking member connected to the lower expander to maintain a stable opening angle between the upper and lower expanders, facilitating subsequent testing. Furthermore, because any of the multiple non-return side surfaces on the limiting portion abut against the blocking surface, the upper and lower expanders can stably open at various angles to accommodate different patients or testing needs, broadening the range of uses of the vaginal dilator.

[0022] Secondly, the locking member is movable relative to the lower expander, and the locking teeth on the locking member cooperate with the limiting portion on the upper expander to limit the relative position of the locking member and the upper expander by applying force to the locking member. In the present application, after the upper and lower expanders are opened, the locking member locks with the upper expander and continues to apply force to the locking member to maintain the open state of the upper and lower expanders. When the force on the locking member is removed, the upper and lower expanders are forced to contract, and the area of ​​the locking member contacting the upper expander gradually decreases until the locking member and the lower expander are separated. During this process, there is no mutually offsetting force between the locking portions of the locking member and the lower expander (i.e., the limiting portion and the locking teeth). Even if the area of ​​the locking member contacting the upper expander gradually decreases, the locking portion will not experience increased pressure, causing fatigue damage or even fracture, resulting in low wear and tear of the vaginal dilator and a low replacement rate.

[0023] Finally, on the one hand, 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, that is, the force arm of the second pressing portion is greater than the force arm of the locking tooth block. The operator can achieve the locking of the locking tooth block and the limit portion with a relatively small force applied to the second pressing portion, thereby ensuring the stability of the opening of the upper and lower expanders. On the other hand, the limit portion is arranged close to the swing arm portion, and due to the lever characteristics of the swing arm portion, the locking tooth block can be locked with the limit portion by a small movement. The small tooth thickness of the locking tooth block can achieve the matching of the locking tooth block and the limit portion. The small distance from the tooth top to the tooth root of the locking tooth block makes the locking tooth block strong, and the locking tooth block is not easily broken after being subjected to force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a vaginal dilator provided in one embodiment of the present application.

[0025] Figure 2 This is an exploded schematic diagram of a vaginal dilator provided in one embodiment of the present application.

[0026] Figure 3 A schematic diagram of the three-dimensional structure of an upper expansion member provided in one embodiment of the present application.

[0027] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0028] Figure 5 A schematic diagram of the partial structure of the lower expansion member provided in one embodiment of the present application.

[0029] Figure 6 A schematic diagram of the three-dimensional structure of a locking member provided in one embodiment of the present application.

[0030] Figure 7 This is a cross-sectional view of a vaginal dilator provided in one embodiment of the present application when closed.

[0031] Figure 8 for Figure 7 A partial enlarged schematic diagram of point B in the middle.

[0032] Figure 9 This is a schematic diagram of the three-dimensional structure of the vaginal dilator provided in one embodiment of the present application when it is opened to a first expansion angle.

[0033] Figure 10 This is a cross-sectional view of a vaginal dilator provided by one embodiment of the present application at a first dilation angle.

[0034] Figure 11 This 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.

[0035] Figure 12 for Figure 11 A partial enlarged schematic diagram of point C in the middle.

[0036] Figure 13 This is a schematic diagram of the three-dimensional structure of the vaginal dilator provided by one embodiment of the present application at a second expansion angle.

[0037] Figure 14 This is a cross-sectional view of a vaginal dilator provided by one embodiment of the present application at a second dilation angle.

[0038] Figure 15 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.

[0039] Figure 16 for Figure 15 A local enlarged schematic diagram of point D in the middle.

[0040] Reference numerals:

[0041] 1. Upper expansion piece;

[0042] 11. Upper expansion portion; 12. Inspection portion; 13. First pressing portion; 14. First rotation axis; 15. Limiting portion;

[0043] 151, card slot; 152, card block; 153, inner arc surface; 154, outer arc surface;

[0044] 1511, first non-return side;

[0045] 1521, second non-return side;

[0046] 2. Lower expansion piece;

[0047] 21. Lower expansion portion; 22. Grip portion;

[0048] 221, first shaft hole; 222, second shaft hole; 223, slide rail; 224, first stopper;

[0049] 3. Locking parts;

[0050] 31. Second pressing portion; 32. Swing arm portion;

[0051] 311, second stopper;

[0052] 321, second rotating shaft; 322, locking tooth block; 323, inner groove;

[0053] 3221. Blocking surface. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0061] Reference Figure 1 As shown, in some embodiments of the present application, a vaginal dilator is provided, comprising: an upper dilator 1, a lower dilator 2 and a locking member 3. The upper dilator 1 and the locking member 3 are connected to the lower dilator 2, so that the upper dilator 1, the lower dilator 2 and the locking member 3 form an integral structure. The upper dilator 1 can move relative to the lower dilator 2 to achieve expansion or closing of the upper dilator 1 and the lower dilator 2. The locking member 3 is used to maintain the expansion angle. When the upper dilator 1 and the lower dilator 2 expand to a predetermined angle, the locking member 3 forms a locking structure with the upper dilator 1 to stably maintain the expansion angle (i.e., the predetermined angle) of the upper dilator 1 and the lower dilator 2. Figure 2 As shown, specifically, the upper expander 1 includes an upper expander 11, an inspection portion 12, and a first pressing portion 13, and the upper expander 11, the inspection portion 12, and the first pressing portion 13 are sequentially connected to form the main structure of the upper expander 1. The lower expander 2 includes a lower expander 21 and a gripping portion 22. The upper expander 11 and the lower expander 21 are arranged opposite to each other. The upper expander 11 and the lower expander 21 are the parts that extend into the patient's body to achieve the purpose of expansion or closing. The inspection portion 12 is provided with a first rotating shaft 14, and the gripping portion 22 is provided with a first axial hole 221 that is compatible with the first rotating shaft 14. The first rotating shaft 14 is installed 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 gripping portion 22, and the upper expander 11 and the lower expander 21 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 . An operator can apply force to the second pressing portion 31 . The swing arm portion 32 is movably connected to the grip portion 22 .

[0062] The locking member 3 and the upper expander 1 form a locking structure, specifically comprising a limit portion 15 provided on the inspection portion 12, and a locking tooth block 322 provided on the swing arm portion 32. The limit portion 15 and the locking tooth block 322 cooperate to restrict the upper expander 1 from closing with the lower expander 21. Preferably, the limit 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 and opens to a predetermined angle relative to the lower expander 2, 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 surfaces (1511, 1521) abut against the blocking surface 3221, and the locking member 3 is used to block 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.

[0063] After the upper expansion member 1 and the lower expansion member 2 are closed, refer to Figure 7 、 8 As shown, the limiting portion 15 is separated 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.

[0064] 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.

[0065] 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 contract, and the area of ​​the non-return side surface (1511, 1521) contacting the blocking surface 3221 gradually decreases until the locking member 3 is separated from the upper expander 1. During this process, since there is no corresponding supporting force on the locking member 3 from the upper expander 1, there is no mutually offsetting force between the locking portion of the locking member 3 and the upper expander 1 (i.e., the limiting portion 15 and the locking tooth block 322). As the area of ​​the non-return side surface (1511, 1521) contacting the blocking surface 3221 gradually decreases, the pressure on them is small, which is unlikely to cause fatigue damage to the limiting portion 15 and the locking tooth block 322. On the other hand, the locking tooth block 322 is a frustum, and one side of the frustum is the blocking surface 3221. Compared with the existing ratchet teeth whose tips are easily broken, the cross-sectional area of ​​the frustum is large, the strength of the locking tooth block 322 is higher, and the service life of the locking tooth block 322 is longer under the influence of the reaction force.

[0066] It should be noted that in this solution, the upper expansion 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.

[0067] 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.

[0068] refer to Figure 3 、 4 As shown, illustratively, 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 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:

[0069] refer to Figure 9-12As 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.

[0070] 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.

[0071] Correspondingly, refer to Figure 13-16 As shown, when the upper expansion member 1 and the lower expansion member 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 expansion member 2. In this specific embodiment, combined with Figure 6 As shown, the locking member 3 is further provided with an inner groove 323 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 engaging block 152 is embedded in the inner groove 323. With the engaging block 152 embedded in the inner groove 323, the locking member 3 and the upper expander 1 are pre-positioned, further securing the connection between the locking member 3 and the upper expander 1. In this embodiment, the first pressing portion 13 abuts against the gripping portion 22 of the lower expander 2.

[0072] 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.

[0073] 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.

[0074] In this program, if Figure 8 As shown, the limiting portion 15 is arranged close to the swing arm portion 32, more specifically, the limiting portion 15 is close to the locking tooth block 322, so that the locking tooth block 322 is locked with the limiting portion 15 as soon as possible. Figure 11 、 12 As shown, the distance L1 from the second pressing portion 31 to the rotation axis O of the swing arm portion 32 is much greater than the distance L2 from the locking tooth block 322 to the rotation axis O of the swing arm portion 32. It can be understood that the swing arm portion 32 is a lever and the second rotation axis 321 is a fulcrum. Since the force arm L1 of the second pressing portion 31 is much greater than the force arm L2 of the locking tooth block 322, after the locking tooth block 322 is locked with the limit portion 15, a small force applied to the second pressing portion 31 can achieve force balance between the second pressing portion 31 and the locking tooth block 322. More importantly, due to the characteristics of the lever, that is, the large force arm end moves a large distance, and the small force arm end moves a small distance. In combination with this solution, the locking tooth block 322 is moved slightly 322 to achieve the locking of the locking tooth block 322 and the limiting part 15. The small tooth thickness of the locking tooth block 322 can be used to complete the cooperation between the locking tooth block 322 and the limiting part 15. The distance from the tooth top to the tooth root of the locking tooth block 322 is small, which makes the strength of the locking tooth block 322 large, and the locking tooth block 322 is not easy to break after being subjected to force.

[0075] In some embodiments of the present application, Figure 5 As shown, the grip portion 22 is provided with an arc-shaped slide rail 223. In this embodiment, the slide rail 223 is located between the first shaft hole 221 and the second shaft hole 222. The slide rail 223 is an arc-shaped track arranged concentrically with the first shaft hole 221. Figure 4 、 7 As shown in Figures 8 and 9, the limiting portion 15 is an arc-shaped block. The limiting portion 15 has an inner arc surface 153 and an outer arc surface 154 that mate with the slide rail 223. The inner arc surface 153 and the outer arc surface 154 are oppositely disposed side surfaces. The inner arc surface 153 mates with the slide rail 223, allowing the limiting portion 15 to slide along the slide rail 223. The limiting portion 15 and the slide rail 223 can limit the rotation angle of the lower expansion member. The outer arc surface 154 is provided with a slot 151, so that a snap-on block 152 is formed on the side of the limiting portion 15 adjacent to the slot 151.

[0076] 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 vaginal dilator, characterized in that: include: An upper expander (1) and a lower expander (2), wherein the upper expander (1) and the lower expander (2) are rotatably connected, the upper expander (1) comprises a limiting portion (15), and the limiting portion (15) has at least two non-return side surfaces (1511, 1521); as well as A locking member (3), wherein the locking member (3) has a blocking surface (3221); when the upper expansion member (1) rotates to a first expansion angle relative to the lower expansion member (2), the blocking surface (3221) abuts against one of the non-return side surfaces (1511, 1521) in the limiting portion (15); and 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).

2. The vaginal dilator according to claim 1, wherein The locking member (3) comprises a locking tooth block (322), and the blocking surface (3221) is provided on the locking tooth block (322).

3. The vaginal dilator according to claim 2, characterized in that The locking member (3) comprises a second pressing portion (31) and a swing arm portion (32) provided with the locking tooth block (322), and the swing arm portion (32) is rotatably connected to the lower expansion member (2); 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).

4. The vaginal dilator according to claim 3, 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).

5. The vaginal dilator according to claim 4, characterized in that When the upper expansion member (1) and the lower expansion member (2) are opened to the first expansion angle, the second pressing portion (31) abuts against the lower expansion member (2).

6. The vaginal dilator according to claim 5, characterized in that A second stopper (311) is provided on the second pressing portion (31), and when the upper expansion member (1) and the lower expansion member (2) are opened to the first expansion angle, the second stopper (311) is pressed against the outer wall of the lower expansion member (2).

7. The vaginal dilator according to any one of claims 2 to 6, characterized in that: The upper expansion member (1) has a first pressing portion (13), and when the upper expansion member (1) and the lower expansion member (2) are opened to the second expansion angle, the first pressing portion (13) abuts against the lower expansion member (2).

8. The vaginal dilator according to claim 7, wherein: The locking member (3) is further provided with an inner groove (323), and the inner groove (323) is adjacent to the locking tooth block (322). When the upper expansion member (1) and the lower expansion member (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).

9. The vaginal dilator according to any one of claims 1 to 6, characterized in that: The upper expansion member (1) comprises an upper expansion portion (11) and an inspection portion (12); the lower expansion member (2) comprises a lower expansion portion (21) and a gripping portion (22) arranged opposite to the upper expansion portion (11); the gripping portion (22) is rotatably connected to the inspection portion (12); and the upper expansion portion (11) and the lower expansion portion (21) are opened or closed.

10. The vaginal dilator according to claim 9, characterized in that The gripping portion (22) is provided with an arc-shaped slide rail (223), the limiting portion (15) has an inner arc surface (153) that fits the slide rail (223), and the limiting portion (15) slides along the slide rail (223).

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