Locking and unlocking mechanism and dilator

Abstract

The present invention discloses a locking and unlocking mechanism, which includes a bearing component, an unlocking component, a one-way locking component, a moving and resetting component, and a locking component. The bearing component, the one-way locking component, and the moving and resetting component are respectively arranged in the holding component of the dilator. One end of the unlocking component is movably connected to the bearing component, and the other end of the unlocking component extends out of the holding component. The one-way locking component is arranged on the unlocking component. The moving and resetting component is movably arranged on the bearing component and is detachably connected to the one-way locking component. The locking component is arranged on the expanding component of the dilator and is connected to the moving and resetting component. The present invention also discloses a dilator. Through the cooperation of the bearing component, the unlocking component, the one-way locking component, the moving and resetting component, and the locking component, the present application realizes the locking and unlocking of the expanding component of the dilator, and the entire locking and unlocking actions are coherent, the process is smooth, the operation is convenient, and the noise is low.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a locking and unlocking mechanism and an expander. Background Art

[0002] Vaginal dilators are common gynecological examination instruments, which generally include a handle, expandable blades, and a locking mechanism that locks the blades to ensure the open state. However, the existing locking and unlocking mechanism is only a simple locking and limiting structure, the locking or unlocking action is not smooth enough, and often makes a sound during the locking or unlocking process, which increases the patient's tension. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a locking and unlocking mechanism and an expander.

[0004] The present invention discloses a locking and unlocking mechanism, which comprises:

[0005] Load bearing components;

[0006] An unlocking component having one end movably connected to the bearing component;

[0007] A one-way locking component provided on the unlocking component;

[0008] A movable reset component movably disposed on the load-bearing component and detachably connected to the one-way locking component; and

[0009] The locking assembly is arranged on the expansion assembly, and the locking assembly is connected to the movable reset assembly; when the one-way locking assembly is connected to the movable reset assembly, the expansion assembly acts on the locking assembly, the locking assembly drives the movable reset assembly to move, the one-way locking assembly restricts the one-way movement of the movable reset assembly, and the movable reset assembly restricts the locking assembly in the reverse direction, so that the locking assembly locks the expanded assembly in the open state; the unlocking assembly acts on the one-way locking assembly, the one-way locking assembly is disengaged from the movable reset assembly, the one-way movement restriction of the one-way locking assembly on the movable reset assembly disappears, the reverse restriction of the movable reset assembly on the locking assembly disappears, and the locking assembly unlocks the expanded assembly in the open state.

[0010] According to one embodiment of the present invention, the unlocking assembly includes an unlocking member, a toggle member and an elastic member, one end of the unlocking member is rotatably connected to the supporting member, the toggle member is arranged at the other end of the unlocking member, the elastic member is respectively connected to the unlocking member and the supporting member, and the one-way locking assembly is arranged on the unlocking member; the elastic member acts on the unlocking member so that the one-way locking assembly and the movable reset assembly maintain a connected state, acts on the toggle member, the unlocking member swings, and drives the one-way locking assembly to disengage from the movable reset assembly.

[0011] According to an embodiment of the present invention, one end of the unlocking member connected to the bearing assembly has a mounting position, and the one-way locking assembly is arranged in the mounting position.

[0012] According to an embodiment of the present invention, the one-way locking assembly includes a one-way locking member and a rotating bearing member. The rotating bearing member is arranged in the unlocking assembly, the one-way locking member is sleeved on the rotating bearing member, and the one-way locking member is detachably connected to the moving and resetting assembly.

[0013] According to an embodiment of the present invention, the one-way locking member includes a one-way rotating wheel portion and a first ratchet tooth arranged on the wheel surface of the one-way rotating wheel portion, and the moving and resetting assembly has a second ratchet tooth adapted to the first ratchet tooth.

[0014] According to an embodiment of the present invention, the moving and resetting assembly includes a moving member and a resetting member. The moving member is slidably connected to the bearing assembly, the one-way locking assembly is detachably connected to the moving member, the resetting member is respectively connected to the moving member and the bearing assembly, and the locking assembly is connected to the moving member; when the one-way locking assembly is connected to the moving member, the locking assembly drives the moving member to move, the moving member acts on the resetting member, the resetting member deforms, and the one-way locking assembly restricts the one-way movement of the moving member. When the one-way locking assembly is separated from the moving and resetting assembly, the resetting member resets the moving member.

[0015] According to an embodiment of the present invention, the locking assembly is detachably connected to the moving member.

[0016] According to an embodiment of the present invention, the locking assembly has a first tooth pattern, the moving member has a second tooth pattern, and the first tooth pattern is meshed or disengaged with the second tooth pattern.

[0017] According to an embodiment of the present invention, the bearing assembly includes a main body, a rotating bearing member and a reset bearing member. The moving member is slidably connected to the main body. The two opposite surfaces of the moving member face the locking assembly and the one-way locking assembly respectively. The rotating bearing member is arranged at one end of the main body, the reset bearing member is arranged at the other end of the main body, one end of the unlocking assembly is rotatably connected to the rotating bearing member, one end of the resetting member is arranged on the reset bearing member, and the other end thereof is connected to the moving member.

[0018] An expander disclosed by the present invention includes the above-mentioned locking and unlocking mechanism.

[0019] The beneficial effects of this application are as follows: Through the cooperation of the bearing assembly, the unlocking assembly, the one-way locking assembly, the moving and resetting assembly and the locking assembly, the locking and unlocking of the expander expansion assembly are realized, and the entire locking and unlocking actions are coherent, the process is smooth, the operation is convenient, and the noise is low. Description of the Drawings

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

[0021] Figure 1 It is a schematic structural view of the expander in the closed state in the embodiment;

[0022] Figure 2 It is a schematic structural view of the expander in the open state in the embodiment;

[0023] Figure 3 For the embodiment Figure 1 The sectional view;

[0024] Figure 4 For the embodiment Figure 3 The sectional view;

[0025] Figure 5 It is a schematic structural view of the locking and unlocking mechanism in the embodiment;

[0026] Figure 6 It is a schematic structural view of the locking and unlocking mechanism from another perspective in the embodiment;

[0027] Figure 7 For the embodiment Figure 3 The enlarged view of part A;

[0028] Figure 8 For the embodiment Figure 4 The enlarged view of part B. Detailed implementation manners

[0029] The following will disclose multiple embodiments of the present invention with diagrams. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0030] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, then the directional indications will also change accordingly.

[0031] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and do not particularly refer to the order or sequence. Nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions 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.

[0032] 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 as follows:

[0033] Refer to Figures 1 to 6 , Figure 1 which is a schematic structural view of the dilator in the closed state in the embodiment. Figure 2 which is a schematic structural view of the dilator in the open state in the embodiment. Figure 3 is a cross-sectional view of the embodiment Figure 1 . Figure 4 is a cross-sectional view of the embodiment Figure 3 . Figure 5 which is a schematic structural view of the locking and unlocking mechanism in the embodiment. Figure 6 which is a schematic structural view of the locking and unlocking mechanism from another perspective in the embodiment. The locking and unlocking mechanism in this embodiment is for a dilator, which can be a duckbill dilator and has a dilation component 100 and a holding component 200. Each component of the locking and unlocking mechanism in this embodiment is respectively installed on the dilation component 100 and the holding component 200 of the dilator. Of course, the locking and unlocking mechanism in this embodiment can also be adaptively arranged for use in other vaginal dilators, and no limitation is made here.

[0034] The locking and unlocking mechanism in this embodiment includes a bearing component 1, an unlocking component 2, a one-way locking component 3, a moving and resetting component 4, and a locking component 5. The bearing component 1, the one-way locking component 3, and the moving and resetting component 4 are respectively arranged in the holding component 200 of the dilator. One end of the unlocking component 2 is movably connected to the bearing component 1, and the other end of the unlocking component 2 extends out of the holding component 200. The one-way locking component 3 is arranged on the unlocking component 2. The moving and resetting component 4 is movably arranged on the bearing component 1 and is detachably connected to the one-way locking component 3. The locking component 5 is arranged on the expanding component 100 of the dilator and is connected to the moving and resetting component 4. When the one-way locking component 3 is connected to the moving and resetting component 4, the expanding component 100 acts on the locking component 5, the locking component 5 drives the moving and resetting component 4 to move, the one-way locking component 3 performs one-way movement restriction on the moving and resetting component 4, and the moving and resetting component 4 performs reverse restriction on the locking component 5, so that the locking component 5 locks the open state of the expanding component 100; when acting on the unlocking component 2, the one-way locking component 3 is separated from the moving and resetting component 4, the one-way movement restriction of the one-way locking component 3 on the moving and resetting component 4 disappears, the reverse restriction of the moving and resetting component 4 on the locking component 5 disappears, and the locking component 5 unlocks the open state of the expanding component.

[0035] In this way, through the cooperation of the bearing component 1, the unlocking component 2, the one-way locking component 3, the moving and resetting component 4, and the locking component 5, the locking and unlocking of the expanding component 100 of the dilator are realized. Moreover, the entire locking and unlocking actions are coherent, the process is smooth, the operation is convenient, the noise is low, and the execution of the locking and unlocking actions is carried out inside the holding component 200 of the dilator, thereby further reducing the noise and avoiding the increase of the patient's nervousness to ensure the smooth progress of the gynecological examination. The dilator in this embodiment can adopt the existing two-wing or four-wing expansion structure. Among them, the holding component 200 is the part held by the doctor when operating the dilator, and the expanding component 100 is the part where the doctor needs to apply force to press during the expansion opening action. In this embodiment, the expansion of the expanding component 100 of the dilator is achieved by pressing on the pressing plate 101, and the details are not described here again.

[0036] Refer to Figure 7 and Figure 8 , Figure 7 which is the enlarged view of part A in the embodiment Figure 3 and Figure 8 which is the enlarged view of part A in the embodiment Figure 4 ​Enlarged view of part B. Further, the moving and resetting assembly 4 includes a moving member 41 and a resetting member 42. The moving member 41 is slidably connected to the bearing assembly 1. The one-way locking assembly 3 is detachably connected to the moving member 41. The resetting member 42 is connected to the moving member 41 and the bearing assembly 1 respectively. The locking assembly 5 is connected to the moving member 41. When the one-way locking assembly 3 is connected to the moving member 41, the locking assembly 5 drives the moving member 41 to move. The moving member 41 acts on the resetting member 42, and the resetting member 42 deforms. And the one-way locking assembly 3 restricts the one-way movement of the moving member 41. When the one-way locking assembly 3 is disengaged from the moving and resetting assembly 4, the resetting member 42 resets the moving member 41. The one-way locking assembly 3 cannot directly restrict the one-way movement of the locking assembly 5, but realizes the indirect cooperation between the one-way locking assembly 3 and the locking assembly 5 through the moving member 41, so as to realize the one-way restriction of the movement of the locking assembly 5, so that the locking assembly 5 maintains the expanded state of the expansion assembly 100. Moreover, through the setting of the resetting member 42, after the one-way locking assembly 3 is disengaged and unlocked from the moving member 41, a reset action is performed to quickly release the one-way restriction on the locking assembly 5, so that the expansion assembly 100 of the dilator quickly closes, so that the doctor can take it out from the vagina.

[0037] Specifically, the moving member 41 includes a moving plate 411. The moving plate 411 is a long strip-shaped plate, which has two opposite sides. One side of the moving plate 411 is detachably connected to the one-way locking assembly 3, and the other side is connected to the locking assembly 5. Preferably, a reset connecting plate 412 is arranged on the side of the moving plate 411 facing away from the locking assembly 5. The resetting member 42 in this embodiment is a compression spring, and its two ends are respectively connected to the moving plate 411 and the bearing assembly 1. When the moving plate 411 moves from the expansion assembly 100 of the dilator towards the holding assembly 200, that is, when the expansion assembly 100 is opened, the resetting member 42 is acted on and compressed by the reset connecting plate 412, and vice versa is the state where the resetting member 42 is reset.

[0038] Preferably, the carrier assembly 1 includes a main body 11, a rotating carrier 12, and a reset carrier 13. The rotating carrier 12 is disposed at one end of the main body 11, and the reset carrier 13 is disposed at the other end of the main body 11. The moving member 41 is slidably connected to the main body 11. The two opposite surfaces of the moving member 41 face the locking assembly 5 and the one-way locking assembly 3 respectively. One end of the unlocking assembly 2 is rotatably connected to the rotating carrier 12. One end of the reset member 42 is disposed on the reset carrier 13, and the other end thereof is connected to the moving member 41. Specifically, the main body 11 is disposed within the holding assembly 200, and is specifically arranged along the height direction of the holding assembly 200. The main body 11 in this embodiment is a long strip-shaped plate. Along its length direction, a chute 111 is provided on the main body 11, and the moving plate 411 of the moving member 41 is slidably connected within the chute 111. The rotating carrier 12 is disposed at the upper end of the main body 11 close to the expansion assembly 100. The rotating carrier 12 in this embodiment is two spaced-apart carrier plates for rotatably carrying the unlocking assembly 2. The reset carrier 13 is disposed at the lower end of the main body 11 away from the expansion assembly 100. The rotating carrier 12 and the reset carrier 13 are arranged on the same side and are both located on the side of the main body 11 facing away from the locking assembly 5. The reset carrier 13 in this embodiment is approximately a cuboid-shaped box body, which is used for carrying, protecting, and guiding the deformation of the reset member 42 of the moving and resetting assembly 4. In this embodiment, the side of the box body structure of the reset carrier 13 facing the moving member 41 and the rotating carrier 12 is open. The reset carrier 13, the moving plate 411, and the reset connecting plate 412 can cooperate to form a complete box body structure, and the moving plate 411 can slide relative to the reset carrier 13, and the reset connecting plate 412 can slide within the reset carrier 13 to protect and guide the deformation of the reset member 42 and limit the deformation guiding of the reset member 42. The reset member 42 in this embodiment is parallel to the moving plate 411, and the two ends of the reset member 42 are respectively connected or abutted to the reset connecting plate 412 and the bottom of the reset carrier 13. Thus, through the chute 111 of the main body 11, the rotating carrier 12, and the reset carrier 13, the sliding carrying of the moving member 41 of the moving and resetting assembly 4, the rotating carrying of the unlocking assembly 2, and the guiding carrying of the reset member 42 of the moving and resetting assembly 4 are respectively realized.

[0039] Refer back to Figures 3 to 8, Further, the unlocking component 2 includes an unlocking member 21, a toggling member 22 and an elastic member 23. One end of the unlocking member 21 is rotatably connected to the bearing component 1. The toggling member 22 is arranged at the other end of the unlocking member 21. The elastic member 23 is respectively connected to the unlocking member 21 and the bearing component 1. The one-way locking component 3 is arranged on the unlocking member 21. The elastic member 23 acts on the unlocking member 21, so that the one-way locking component 3 and the moving and resetting component 4 maintain a connected state. Acting on the toggling member 22, the unlocking member 21 swings and drives the one-way locking component 3 to disengage from the moving and resetting component 4. Through the cooperation of the unlocking member 21 and the toggling member 22, it is convenient to realize the disengagement of the one-way locking component 3 and the moving and resetting component 4, which is convenient for the unlocking operation. And the cooperation of the elastic member 23 and the unlocking member 21 can maintain the connection relationship between the one-way locking component 3 and the moving and resetting component 4, so as to maintain the one-way restriction on the locking component 5, ensure the locking state of the locking component 5, and maintain the stability of the expansion state of the expansion component 100.

[0040] Preferably, one end of the unlocking member 21 connected to the bearing component 1 has a mounting position 211, and the one-way locking component 3 is arranged in the mounting position 211. Through the setting of the mounting position 211, it is convenient for the installation of the one-way locking component 3 and reduces the installation volume. Specifically, the unlocking member 21 is rod-shaped. One end of it is rotatably connected to the rotating bearing member 12 of the bearing component 1. On the end face of the unlocking member 21, two relatively spaced long strips are integrally connected to form a U-shaped groove-like mounting position 211 structure. The end of the mounting position 211 is located within the two bearing plates of the rotating bearing member 12 and is rotatably connected to the bearing plate of the rotating bearing member 12 through a rotating shaft 121. Preferably, the other end of the unlocking member 21 far from the bearing component 1 has a bending structure 212. The bending structure 212 can enable the other end of the unlocking member 21 to pass through and be exposed outside the holding component 200. The toggling member 22 is button-shaped and is arranged on the end of the unlocking member 21 exposed outside the holding component 200. In this way, when the operator holds the holding component 200, the toggling member 22 can be easily pressed, so that the unlocking member 21 rotates around the rotating shaft 121 on the rotating bearing member 12, making the one-way locking component 3 disengage from the moving plate 411 of the moving member 41. Moreover, the setting of the bending structure 212 will enable the operator to press the toggling member 22 to move a small distance, and the unlocking member 21 can swing a large angle, so that the one-way locking component 3 and the moving plate 411 disengage, thus easily realizing the unlocking action. The elastic member 23 in this embodiment is a torsion spring, which is sleeved on the rotating shaft 121, and its two ends are respectively connected to the main body 11 and the unlocking member 21. The elastic member 23 provides elastic torsion force, so that the unlocking member 21 has a tendency to always approach the main body 11. When no force is applied by the operator on the toggling member 22, the connection relationship between the one-way locking component 3 and the moving plate 411 of the moving member 41 is maintained, ensuring the one-way restriction of the one-way locking component 3 on the moving plate 411.

[0041] Refer back toFigures 3 to 8 Furthermore, the one-way locking component 3 includes a one-way locking member 31 and a rotating bearing member 32. The rotating bearing member 32 is arranged on the unlocking component 2, the one-way locking member 31 is sleeved on the rotating bearing member 32, and the one-way locking member 31 is detachably connected to the moving and resetting component 4. Due to the characteristic that the one-way locking member 31 can only move in one direction, the moving member 41 of the moving and resetting component 4 is restricted to move in only one direction, that is, the one-way movement of the moving member 41 is restricted. Specifically, the rotating bearing member 32 is arranged at the installation position 211. In this embodiment, the rotating bearing member 32 is a rotating shaft, and its two ends are respectively vertically arranged on the inner wall of the groove of the installation position 211. After the one-way locking member 31 is sleeved on the rotating bearing member 32, its outer surface is exposed outside the installation position 211 to facilitate the connection between the one-way locking member 31 and the moving plate 411 of the moving member 41. The one-way locking member 31 can adopt a roller that can only rotate in one direction. For example, a roller provided with a one-way bearing is used, and no limitation is made here.

[0042] Preferably, the one-way locking member 31 includes a one-way rotating wheel portion 311 and a first ratchet tooth 312 arranged on the wheel surface of the one-way rotating wheel portion 311, and the moving and resetting component 4 has a second ratchet tooth 413 adapted to the first ratchet tooth 312. The cooperation between the first ratchet tooth 312 arranged on the wheel surface of the one-way rotating wheel portion 311 and the second ratchet tooth 413 of the moving and resetting component 4 ensures the stability of the one-way limiting effect of the one-way locking member 31 on the moving and resetting component 4 through the characteristic of the ratchet teeth, thereby improving the stability of the one-way limitation on the locking component 5 and ensuring the stability of the expansion component 100 maintaining the open state. In this embodiment, the second ratchet tooth 413 is specifically located on the surface of the moving plate 411 facing the one-way locking member 31.

[0043] Preferably, the locking component 5 is detachably connected to the moving member 41. Specifically, the locking component 5 has a first serration 51, and the moving member 41 has a second serration 414. The first serration 51 is meshed or disengaged with the second serration 414. In this embodiment, the locking component 5 is a long strip plate with a certain elasticity or flexibility. One end of it is connected to the pressing plate 101 of the expansion component 100, and the other end extends into the interior of the holding component 200. The first serration 51 is arranged on the side wall of the locking component 5 extending into the interior of the holding component 200, and a second serration 414 adapted thereto is arranged on the surface of the moving plate 411 of the moving member 41 facing the locking component 5. When the two are meshed, the locking component 5 and the moving plate 411 form a connection relationship. When the two are disengaged, the action of the moving plate 411 on the locking component 5 immediately disappears. By setting the locking component 5 and the moving plate 411 of the moving member 41 to be detachably connected, on the one hand, it can avoid the locking component 5 being too long. On the other hand, when the resetting member 42 is reset, the detachable connection between the locking component 5 and the moving member 41 can quickly realize the closing of the expansion component 100. Preferably, both the first serration 51 and the second serration 414 are in the shape of ratchet teeth to facilitate maintaining the stability of the meshing state between the two.

[0044] The locking and unlocking process in this embodiment is as follows: the doctor holds the hand-held holding component 200 as an operator, and inserts the blades of the expansion component 100 into the vagina, and then applies pressure to the pressing plate 101 of the expansion component 100, so that the upper blades 102 of the expansion component 100 rotate clockwise and open, that is, the expansion component 100 of the dilator begins to expand. At this time, the flexible locking component 5 moves toward the moving plate 411, and the first toothed groove 51 of the locking component 5 is engaged with the second toothed groove 414 of the moving plate 411. At this time, the locking component 5 and the moving plate 411 form a connection. Continue to apply pressure to the pressing plate 101, the locking component 5 will continue to act on the movable plate 411, and the movable plate 411 will move downward, that is, move from the direction of the expansion component 100 to the direction of the gripping component 200, and the reset connecting plate 412 on the movable plate 411 will overcome the elastic force of the reset member 42, compress the reset member 42, and make the movable plate 411 continue to move downward until the doctor determines that the expansion component 100 has been opened to the full extent and stops applying force to the pressing plate 101; in this process, the elastic member 23 acts on the unlocking member 21, so that the one-way locking member 3 1 always maintains a meshing connection relationship with the moving plate 411. Because of the unidirectional restriction of the one-way locking member 31, it will prevent the reset member 42 compressed by the reset connecting plate 412 from being pushed upward. At this time, the locking member 5 will be pulled by the moving plate 411, so that the expansion member 100 is maintained in the open position. After the doctor releases the force applied to the pressing plate 101, the vaginal retraction will react on the expansion member 100. However, because the locking member 5 is pulled by the moving plate 411, and is pulled by the moving plate 411 and is restricted by the one-way locking member 31 and cannot move upward, the expansion member 100 is still It will remain in the open state, so that the doctor with his hands free can perform the examination operation; when the examination is completed, the doctor presses the toggle member 22, and the unlocking member 21 swings away from the movable plate 411. At this time, the one-way locking member 31 is disengaged from the movable plate 411, and the elasticity of the compressed reset member 42 is released, pushing the reset connecting plate 412 upward, so that the movable plate 411 moves upward. After moving up a certain distance, the relative position of the movable plate 411 and the locking assembly 5 changes, the locking assembly 5 and the movable plate 411 are disengaged, and the expansion assembly 100 is quickly closed for the doctor to take out.

[0045] In summary, the locking and unlocking of the expander expansion component 100 is achieved through the cooperation of the carrying component 1, the unlocking component 2, the one-way locking component 3, the movable reset component 4 and the locking component 5, and the entire locking and unlocking action is continuous, the process is smooth, the operation is convenient, and the noise is low. Moreover, the locking and unlocking action is still performed inside the expander holding component 200, thereby further reducing the noise and avoiding the increase of the patient's tension to ensure the smooth progress of the gynecological examination.

[0046] The above are only embodiments of the present invention and are 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 replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A locking and unlocking mechanism, characterized in that, it includes: a bearing component (1); an unlocking component (2) with one end movably connected to the bearing component (1); a one-way locking component (3) provided on the unlocking component (2), the one-way locking component (3) includes a one-way locking member (31) and a rotating bearing member (32), the rotating bearing member (32) is provided on the unlocking component (2), the one-way locking member (31) is sleeved on the rotating bearing member (32), the one-way locking member (31) is detachably connected to the moving and resetting component (4), and the one-way locking member (31) includes a one-way rotating wheel portion (311) and a first ratchet tooth (312) provided on the wheel surface of the one-way rotating wheel portion (311); a moving and resetting component (4) movably provided on the bearing component (1) and detachably connected to the one-way locking component (3), the moving and resetting component (4) includes a moving member (41) and a resetting member (42), the moving member (41) is slidably connected to the bearing component (1), a second ratchet tooth (413) adapted to the first ratchet tooth (312) is provided on the moving member (41), and the resetting member (42) is connected to the moving member (41) and the bearing component (1) respectively; and a locking component (5) provided on the expanding component, the locking component (5) is connected to the moving member (41), and the locking component (5) is a long strip-shaped plate with a certain elasticity or flexibility; when the one-way locking component (3) is connected to the moving and resetting component (4), the expanding component acts on the locking component (5), the locking component (5) drives the moving and resetting component (4) to move, the one-way locking component (3) performs a one-way movement restriction on the moving and resetting component (4), and the moving and resetting component (4) performs a reverse restriction on the locking component (5), so that the locking component (5) locks the open state of the expanding component; when acting on the unlocking component (2), the one-way locking component (3) is disengaged from the moving and resetting component (4), the one-way movement restriction of the one-way locking component (3) on the moving and resetting component (4) disappears, the reverse restriction of the moving and resetting component (4) on the locking component (5) disappears, the locking component (5) unlocks the open state of the expanding component, and the locking component (5) has a first serration (51); the moving member (41) includes a moving plate (411), the moving plate (411) has two opposite sides, a second ratchet tooth (413) is provided on the side of the moving plate (411) detachably connected to the one-way locking component (3), and the second ratchet tooth (413) is adapted to the first ratchet tooth (312); a second serration (414) is provided on the side of the moving plate (411) connected to the locking component (5), and the first serration (51) is meshed or disengaged with the second serration (414).

2. The locking and unlocking mechanism according to claim 1, characterized in that, The unlocking assembly (2) includes an unlocking member (21), a toggling member (22), and an elastic member (23). One end of the unlocking member (21) is rotatably connected to the bearing assembly (1). The toggling member (22) is provided at the other end of the unlocking member (21). The elastic member (23) is connected to the unlocking member (21) and the bearing assembly (1) respectively. The one-way locking assembly (3) is provided on the unlocking member (21). The elastic member (23) acts on the unlocking member (21) so that the one-way locking assembly (3) maintains a connected state with the moving and resetting assembly (4). Acting on the toggling member (22), the unlocking member (21) swings, driving the one-way locking assembly (3) to disengage from the moving and resetting assembly (4).

3. The locking and unlocking mechanism according to claim 2, wherein, One end of the unlocking member (21) connected to the bearing assembly (1) has a mounting position (211), and the one-way locking assembly (3) is provided in the mounting position (211).

4. The locking and unlocking mechanism according to claim 1, wherein, When the one-way locking assembly (3) is connected to the moving member (41), the locking assembly (5) drives the moving member (41) to move. The moving member (41) acts on the resetting member (42), causing the resetting member (42) to deform. And the one-way locking assembly (3) restricts the one-way movement of the moving member (41). When the one-way locking assembly (3) disengages from the moving and resetting assembly (4), the resetting member (42) resets the moving member (41).

5. The locking and unlocking mechanism according to claim 4, wherein, The bearing assembly (1) includes a main body (11), a rotating bearing member (12), and a resetting bearing member (13). The moving member (41) is slidably connected to the main body (11). The two opposite surfaces of the moving member (41) face the locking assembly (5) and the one-way locking assembly (3) respectively. The rotating bearing member (12) is provided at one end of the main body (11), and the resetting bearing member (13) is provided at the other end of the main body (11). One end of the unlocking assembly (2) is rotatably connected to the rotating bearing member (12). One end of the resetting member (42) is provided on the resetting bearing member (13), and the other end is connected to the moving member (41).

6. A dilator, wherein, It includes the locking and unlocking mechanism according to any one of claims 1-5.

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