Bidirectional self-locking mechanism and aspirator

Abstract

The application discloses a bidirectional self-locking mechanism and a suction device, and relates to the field of medical devices, which comprises a fixing seat, a rotating input part and a rotating output part rotatably arranged on the fixing seat, the rotating input part can drive the rotating output part to rotate, the bidirectional self-locking mechanism further comprises a locking limiting part and a locking unit, the locking limiting part is fixedly connected with the fixing seat, and the locking unit is arranged on the rotating output part; the locking unit can be limitedly matched with the locking limiting part to limit the rotation of the rotating output part without external driving force applied to the rotating input part; and the rotating input part can unlock the limiting of the locking limiting part and the locking unit and drive the rotating output part to rotate when the rotating input part is rotated by external driving force. The application has the advantages of convenient operation, assembly and high precision.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a bidirectional self-locking mechanism and a suction device. Background Technology

[0002] Suction devices are frequently used surgical instruments in endoscopic surgery. Suction devices with oscillation functions are becoming increasingly popular among medical professionals due to their better suction and flushing flexibility.

[0003] In the relevant technologies, the drive mechanism for the suction head to deflect during use is relatively complex in locking the position of the suction head after deflection. It also has the problems of cumbersome operation and large error in locking the deflection position.

[0004] Therefore, how to design a drive mechanism and aspirator that are simple in structure, easy to operate, and can improve the accuracy of the aspirator is a problem worth considering in this field. Summary of the Invention

[0005] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention provides a bidirectional self-locking mechanism and suction device, which has the advantages of convenient operation and assembly, and high precision.

[0006] To achieve the above objectives, a first aspect of the present invention discloses a bidirectional self-locking mechanism, including a fixed base, and a rotary input component and a rotary output component rotatably disposed on the fixed base. The rotary input component can drive the rotary output component to rotate. The bidirectional self-locking mechanism further includes a locking limit component and a locking unit. The locking limit component is fixedly connected to the fixed base, and the locking unit is disposed on the rotary output component.

[0007] The locking unit can engage with the locking limiter to limit the rotation of the rotary output component when no external driving force is applied to the rotary input component. When the rotary input component is subjected to an external driving force, it can unlock the locking limiter and the locking unit, and drive the rotary output component to rotate.

[0008] The bidirectional self-locking mechanism in this technical solution can achieve bidirectional self-locking of the output component during use. During use, only the clockwise / counterclockwise rotation of the active side (rotary input component) is allowed to transmit torque to the output side (rotary output component), realizing positive transmission. The normally locked output side cannot drive the active side (rotary input component) to rotate, thus improving safety and stability during use.

[0009] Furthermore, the locking unit includes a first locking member and a second locking member. When no external driving force is applied to the rotary input member, the first locking member and the second locking member respectively engage with the locking limiting member and are used to limit the rotation of the rotary output member in the forward and reverse directions, respectively.

[0010] During the forward rotation of the rotary input component, the rotary input component can unlock the locking limit component and the first locking component, and drive the rotary output component to rotate in the forward direction. When the rotary input component rotates in the reverse direction, the rotary input component can unlock the locking limit component and the second locking component, and drive the rotary output component to rotate in the reverse direction.

[0011] Furthermore, the first locking member and the second locking member are pivotally disposed on the rotary output member, and a driving part is formed on the rotary input member, the driving part being circumferentially opposite to the first locking member and the second locking member;

[0012] When the rotary input component rotates in the forward direction, the drive unit can sequentially drive the first locking component to rotate and release the forward limiting engagement between the first locking component and the locking limit component, as well as drive the rotary output component to rotate in the forward direction.

[0013] When the rotary input component rotates in the opposite direction, the drive unit can sequentially drive the second locking component to rotate and release the reverse limiting engagement between the second locking component and the locking limit component, and drive the rotary output component to rotate in the opposite direction.

[0014] Furthermore, the rotary output component has a drive engagement portion that cooperates with the drive unit. The drive engagement portion is circumferentially opposite to and spaced apart from the drive unit. The rotation of the rotary input component is achieved by the cooperation of the drive unit and the drive engagement portion, which drives the rotary output component to rotate. During the rotation of the rotary input component,

[0015] The driving unit sequentially engages with the first locking member / second locking member and the driving engagement unit.

[0016] Furthermore, the locking unit also includes a locking elastic element, which is disposed on the rotary output element and located within the gap between the rotary input element and the rotary output element. The locking elastic element has a plurality of elastic arms formed thereon, and the first locking element and the second locking element are respectively connected to the plurality of elastic arms. The elastic arms are configured to provide elastic force to the corresponding first locking element and the second locking element, causing them to tend to engage with the locking limit element, so that the second end of the first locking element and the second end of the second locking element can automatically reset to the position engaged with the locking limit element without the input of external driving force.

[0017] Furthermore, a protruding limiting step is formed on the rotating output component. The limiting step is disposed on the pivoting paths of the first locking component and the second locking component, respectively. The first locking component and the second locking component are respectively disposed between the corresponding elastic arm and the corresponding limiting step. The limiting step is used to restrict the rotation of the first locking component in one direction.

[0018] Furthermore, the locking and limiting member has a plurality of limiting teeth formed around the axis of the rotating output member. The limiting teeth include a first side and a second side opposite to each other in the circumferential direction. When no external driving force is applied to the rotating input member, the first locking member abuts against the entire side of the first side of one of the limiting teeth, and the second locking member abuts against the entire side of the second side of one of the limiting teeth; or, the first locking member abuts against half of the side of the first side of one of the limiting teeth, and the second locking member abuts against half of the side of the second side of one of the limiting teeth.

[0019] Furthermore, the bidirectional self-locking mechanism includes multiple sets of locking units, one set of which is abutted on all sides and another set of which is abutted on half sides.

[0020] Furthermore, the locking and limiting member has a plurality of limiting teeth distributed circumferentially, and the locking unit includes a first locking member and a second locking member. When no external driving force is applied to the rotary input member, the first locking member and the second locking member respectively engage with different limiting teeth and are used to limit the forward and reverse rotation of the rotary output member.

[0021] Furthermore, the locking elastic element is connected to or abuts against the first locking element and the second locking element respectively, in order to provide locking elastic force.

[0022] Furthermore, the locking and limiting member is fitted on the outside of the rotating output member, the limiting tooth protrudes from the inner surface of the locking and limiting member, and the first locking member and the second locking member are disposed on the inner side of the locking and limiting member and are opposite to the limiting tooth.

[0023] Furthermore, the rotating output component is fitted onto the outer side of the locking and limiting component, the limiting tooth protrudes from the outer surface of the locking and limiting component, and the first locking component and the second locking component are disposed on the outer side of the locking and limiting component and are opposite to the limiting tooth.

[0024] Furthermore, the bidirectional self-locking mechanism includes a plurality of locking units, which are circumferentially distributed around the axis of the rotating output component.

[0025] Furthermore, the plurality of locking units can be divided into at least a first locking group and a second locking group. When the first locking member and the second locking member in the first locking group abut against the root of the first side and the root of the second side of the limiting tooth, the first locking member and the second locking member in the second locking group respectively limit the middle part of the tooth height of the first side and the second side of the limiting tooth to be opposite each other.

[0026] Furthermore, the fixed base includes a base body and an assembly connection part. The locking and limiting member is formed on the main body. The mounting hole is formed on the base body. The rotating output member is rotatably disposed in the mounting hole. The rotating input member is rotatably disposed on the base body. The assembly connection part is used for assembly connection with external components.

[0027] Furthermore, the rotary input component includes an input body, and a first latching unit and a second latching unit disposed on the input body. The first latching unit and the second latching unit are radially spaced apart and respectively latch into the fixed base and the rotary output component.

[0028] A second aspect of the present invention discloses a suction device, including a suction assembly and an operating handle. The suction assembly includes a tiltable suction head and a transmission assembly for driving the suction head to tilt. The suction device also includes the bidirectional self-locking mechanism described in the first aspect. The bidirectional self-locking mechanism is disposed on the operating handle, and the rotating output component of the bidirectional self-locking mechanism is connected to the transmission assembly.

[0029] Furthermore, the transmission assembly includes flexible traction members arranged at relatively intervals, one end of the flexible traction member is connected to the suction head, and the other end of the flexible traction member is connected to the rotary output member. The operating handle includes a handle housing, and the rotary input member is disposed outside the handle housing. The transmission assembly also includes a winding post, which is coaxially arranged and fixedly connected to the rotary output member.

[0030] Furthermore, the handle housing includes a main body and a grip portion, the grip portion being disposed on the rear bottom side of the main body, and the rotary input component protruding from the bottom surface of the main body and located on the front side of the grip portion;

[0031] The suction device also includes a flushing and suction assembly, which includes a flushing and suction operating component for controlling the activation of the flushing and suction action. The flushing and suction operating component is located on the top of the handle housing.

[0032] The suction device provided by this invention can accurately position the suction head after it has been tilted in any direction during use, thus avoiding shaking of the suction head during use and improving surgical quality. Moreover, the bidirectional self-locking mechanism can be modularly assembled with surgical instruments, which can improve assembly efficiency and ensure assembly quality.

[0033] Furthermore, in this embodiment, the operating components (flushing and suction operating components and rotary input components) on the handle are respectively set at different positions on the operating handle. In this way, during actual operation, they can be operated by the index finger and thumb respectively, which is convenient and enables one-handed operation.

[0034] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of the present invention will be shown in detail in conjunction with the accompanying drawings, but this is not intended to limit the technical solutions of the present invention. In addition, each of these features, elements and components appearing in the following text and drawings is a plurality of, and different symbols or numbers are used for convenience of representation, but all represent parts with the same or similar construction or function. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] Figure 1 This is an exploded view of a bidirectional self-locking structure according to one embodiment of the present invention;

[0037] Figure 2 This is an exploded view of a bidirectional self-locking structure according to one embodiment of the present invention;

[0038] Figure 3 This is a front sectional view of a bidirectional self-locking structure according to one embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the locking limit member and locking unit in a cooperative state (bidirectional locking state) according to one embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram of the locking limit member and locking unit in a cooperative state according to one embodiment of the present invention (the state in which the rotating output member can rotate clockwise).

[0041] Figure 6 This is a schematic diagram of the locking limit member and locking unit in a cooperative state according to one embodiment of the present invention (the state in which the rotating output member can rotate counterclockwise).

[0042] Figure 7 This is an overall shape drawing of the suction device according to one embodiment of the present invention;

[0043] Figure 8 This is a side cross-sectional view of one embodiment of the present invention;

[0044] Figure 9 This is a diagram showing the internal structure of the suction device handle according to one embodiment of the present invention;

[0045] Figure 10 This is an exploded view of a bidirectional self-locking mechanism according to one embodiment of the present invention;

[0046] Figure 11 This is a structural diagram of a rotary input component according to one embodiment of the present invention.

[0047] in,

[0048] 10. Fixing base; 11. Locking and limiting component; 111. Limiting tooth; 1111. First side surface; 1112. Second side surface; 12. Assembly connection part; 13. Mounting hole;

[0049] 20. Rotary input component; 21. Drive unit; 22. Rubber sleeve; 23. Input body; 24. First latching unit; 241. First latch; 25. Second latching unit; 251. Second latch;

[0050] 30. Rotary output component; 31. Drive mating part; 32. Limiting step; 33. Elastic element mounting part;

[0051] 40. Locking unit; 41. First locking element; 42. Second locking element; 43. Locking elastic element; 431. Elastic arm;

[0052] 50. Tighten the nut;

[0053] 60. Handle housing; 61. Main body; 62. Grip part;

[0054] 72. Flushing and suction operating components; 71. Flushing and suction head;

[0055] 80. Transmission assembly; 81. Flexible traction component; 82. Winding post; 83. Jacket. Detailed Implementation

[0056] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain the present invention and should not be construed as limiting the invention.

[0057] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this invention. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0058] See appendix Figures 1 to 11 The first aspect of the present invention discloses a bidirectional self-locking mechanism: including a fixed base 10, and a rotary input member 20 and a rotary output member 30 rotatably disposed on the fixed base 10, wherein the rotary input member 20 is capable of driving the rotary output member 30 to rotate.

[0059] The bidirectional self-locking mechanism further includes a locking limit member 11 and a locking unit 40. The locking limit member 11 is fixedly connected to the fixed base 10, and the locking unit 40 is disposed on the rotating output member 30.

[0060] The locking unit 40 can engage with the locking limit member 11 to limit the rotation of the rotary output member 30 when no external driving force is applied to the rotary input member 20.

[0061] The rotary input component 20 can unlock the locking limit component 11 and the locking unit 40 when rotated by an external driving force, and drive the rotary output component 30 to rotate.

[0062] The bidirectional self-locking mechanism in this embodiment can output rotational driving force, and the active side can be input bidirectionally, while the output side is a reverse self-locking mechanism. It can be applied in scenarios driven by rotation. For example, the bidirectional self-locking mechanism can be used in lifting scenarios. Inputting power drives the active side component (a deceleration structure can be added) to drive the driven side component to lift the heavy object. After the power input to the active side component is canceled, the driven side component self-locks, and the heavy object does not fall (the brake structure can be eliminated). The bidirectional self-locking mechanism can also be used for the swing drive of swinging surgical instruments such as endoscopes and suction devices. The original endoscope swing knob requires an additional locking component, and generally it is necessary to rotate the knob first and then perform the locking action. Using the bidirectional self-locking mechanism of this embodiment can greatly improve convenience.

[0063] The bidirectional self-locking mechanism in this embodiment can be designed independently and modularly, and can be a component with independent functions, capable of outputting rotational driving force. During assembly, modular pre-assembly can be achieved, and it can be debugged individually. Moreover, during the assembly of the whole machine, it is not affected by the installation of other external accessories, is easy to replace, and is conducive to maintaining precision and mass production.

[0064] In this embodiment, the rotary input component 20 of the bidirectional self-locking mechanism can be driven manually or by a motor. When driven by a motor, a clutch assembly can be set between the motor and the rotary input component 20. When no driving is required, the motor and the rotary input component 20 can be disengaged from the motor shaft, thus improving the motor's lifespan without relying on motor self-locking.

[0065] In this embodiment, the fixed base 10 serves as the mounting base for the bidirectional self-locking mechanism, facilitating the installation of the rotary input component 20, the rotary output component 30, the locking limit component 11, and the locking unit 40. On the other hand, the fixed base 10 also serves as a connector for connecting with other components. For example, when the bidirectional self-locking mechanism is used in a suction device, the fixed base 10 can be connected to the handle housing 60 by screws, allowing the bidirectional self-locking mechanism to be modularly assembled in the suction device.

[0066] In this embodiment, the rotary input component 20 is connected to the rotary output component 30 via a transmission. The rotation of the rotary input component 20 can drive the rotation of the rotary output component 30, thereby outputting a rotary driving force. In this embodiment, the rotary input component 20 can drive the rotary output component 30 to rotate in the forward direction or in the reverse direction. That is, the rotary output component 30 can output a forward or reverse rotary driving force as needed.

[0067] In this embodiment, the locking limit member 11 and the locking unit 40 are used to prevent the rotary output member 30 from rotating in the forward or reverse direction relative to the output drive wheel under the action of the load torque when the external driving force applied to the rotary input member 20 disappears. This can keep the load stably in the corresponding position after being driven. In this embodiment, the locking unit 40 and the locking limit member 11 limit the rotation of the rotary output member 30 through a limiting cooperation. The limitation of the rotation of the rotary output member 30 mentioned here means that the passive side (rotary output member 30) cannot transmit torque to the active side (rotary input side), which realizes the bidirectional self-locking of the bidirectional self-locking mechanism and improves the safety and stability during use.

[0068] In this embodiment, when the rotary input component 20 rotates under the action of an external driving force (e.g., in the forward direction), it first releases the limit on the rotary output component 30 to rotate in the forward direction. After the limit is released, the rotary input component 20 drives the rotary output component 30 to rotate in the forward direction and outputs a forward rotary driving force.

[0069] In this embodiment, the cooperation structure between the locking unit 40 and the locking limit member 11 is not limited. For example, when setting it, the locking unit 40 and the locking limit member 11 can achieve the limiting cooperation through snap-fit, friction or plug-in, as long as the bidirectional self-locking of the rotating output member 30 can be achieved.

[0070] In this embodiment, the structure for unlocking the locking limit member 11 and the locking unit 40 when the rotary input member 20 is rotated by an external driving force is not limited. For example, it can be achieved through a mechanical transmission structure or an electronic control structure.

[0071] The bidirectional self-locking mechanism in this embodiment can achieve bidirectional self-locking during use. During use, only the clockwise / counterclockwise rotation of the active side (rotary input component 20) is allowed to transmit torque to the output side (rotary output component 30) to achieve forward transmission. The output side is normally locked and cannot drive the active side (rotary input component 20) to rotate, thereby improving safety and stability during use.

[0072] In this embodiment, the specific structure of the rotary input component 20 is not limited. For example, it can be set as a cover structure, or it can be set as other forms as needed, as long as the above functions can be achieved. In this embodiment, the connection between the rotary input component 20 and the fixed base 10 is not limited. It can be achieved by setting a snap-fit ​​structure on the rotary input component 20, or by using an insert fitting structure.

[0073] As one embodiment of the present invention, see Appendix Figure 1 , 2 10. The locking unit 40 includes a first locking member 41 and a second locking member 42. When no external driving force is applied to the rotary input member 20, the first locking member 41 and the second locking member 42 respectively cooperate with the locking limiting member 11 and are used to limit the rotation of the rotary output member 30 in the forward and reverse directions.

[0074] During the forward rotation of the rotary input component 20, the rotary input component 20 can unlock the locking limit component 11 and the first locking component 41, and drive the rotary output component 30 to rotate in the forward direction. When the rotary input component 20 rotates in the reverse direction, the rotary input component 20 can unlock the locking limit component 11 and the second locking component 42, and drive the rotary output component 30 to rotate in the reverse direction.

[0075] In this embodiment, the first locking member 41 and the second locking member 42 are used to achieve self-locking for rotation of the rotary output member 30 in one direction. The first locking member 41 corresponds to the forward self-locking of the rotary output member 30, and the second locking member 42 corresponds to the reverse self-locking of the rotary output member 30. By implementing different self-locking functions through two components, the reliability of self-locking can be improved, and the failure of one component will not affect the normal function of the other component. Of course, it is conceivable that, in the setting, a single component can also be used to achieve bidirectional self-locking.

[0076] In this embodiment, unlocking refers to releasing the limiting engagement between the locking limit member 11 and the first locking member 41 or the second locking member 42, and enabling the rotating output member 30 to rotate in the positive or negative direction.

[0077] In one embodiment of the present invention, the rotary output member 30 has a drive engagement portion 31 that cooperates with the drive portion 21. The drive engagement portion 31 is circumferentially opposite to and spaced apart from the drive portion 21. The rotation of the rotary input member 20 is achieved by the cooperation of the drive portion 21 and the drive engagement portion 31, which drives the rotary output member 30 to rotate. During the rotation of the rotary input member 20...

[0078] The driving part 21 sequentially engages with the first locking member 41, the second locking member 42, and the driving engagement part 31.

[0079] In this embodiment, the driving part 21 on the rotary input component 20 cooperates with the first locking component 41 and the second locking component 42. During rotation, the driving part 21 pushes the first locking component 41 and the second locking component 42 to rotate in the corresponding direction until they are disengaged from the locking limit component 11. On the other hand, the driving part 21 can cooperate with the driving engagement part 31 on the rotary output component 30, and the rotation of the rotary output component 30 is driven by the mutual squeezing and pushing of the two.

[0080] In one embodiment, the driving part 2 and the driving engagement part 31 are initially spaced at a certain angle in the circumferential direction. At the beginning stage of the rotation of the rotary input part 20, the driving part 21 and the driving engagement part 31 are not in contact. At this time, the rotation of the rotary input part 20 will not drive the rotary output part 30 to rotate. Instead, it will first drive the first locking part 41 or the second locking part 42 to rotate and release the limit before it can form a engagement relationship with the rotary output part 30 and drive the rotary output part 30 to rotate synchronously. That is, at the beginning stage of the rotation, the rotary input part 20 rotates relative to the rotary output part 30. Only after the rotary input part 20 has rotated through a certain angle (after the gap between the driving part 21 and the driving engagement part 31 is eliminated) can it drive the rotary output part 30 to rotate synchronously.

[0081] In this embodiment, the rotary input component 20 is first unlocked (in coordination with the first locking component 41 and the second locking component 42) and then driven (in coordination with the rotary output component 30) during rotation, which can ensure the stability of driving and self-locking.

[0082] In this embodiment, the number of drive mating parts 31 and drive parts 21 can be set to multiple, with multiple drive mating parts 31 and drive parts 21 corresponding one-to-one and evenly distributed around the axis, as shown in the attached figure. Figure 1 As shown, the number of driving parts 21 and driving mating parts 31 are each set to four, with the four driving mating parts 31 distributed at circumferential intervals, and the locking unit 40 is arranged within the circumferential interval between two adjacent driving mating parts.

[0083] As one embodiment of the present invention, see Appendix Figure 1, 2 The locking unit 40 further includes a locking elastic element 43, which is disposed on the rotary output element 30 and located in the interval between the rotary input element 20 and the rotary output element 30. A plurality of elastic arms 431 are formed on the locking elastic element 43. The first locking element 41 and the second locking element 42 are respectively connected to the plurality of elastic arms 431. The elastic arms 431 are configured to provide elastic force to the corresponding first locking element 41 and second locking element 42 to make them tend to cooperate with the locking limit element 11, so that the second end of the first locking element 41 and the second end of the second locking element 42 can automatically reset to the position of cooperating with the locking limit element 11 without the input of external driving force.

[0084] In this embodiment, the locking elastic element 43 is used to adjust the position of the first locking element 41 and the second locking element 42 to achieve the switching of different functions. When the rotary input element 20 pushes the first locking element 41 or the second locking element 42 to rotate and unlock under the action of external driving force, the corresponding elastic arm 431 is compressed and stores force. When the external driving force disappears, the elastic arm 431 will drive the first locking element 41 or the second locking element 42 to reset to the position that is limited and matched with the locking limit element 11 through the stored elastic force, and drive the rotary input element 20 to rotate in the opposite direction of the input direction.

[0085] In this embodiment, there is no limitation on how the locking elastic element 43 is set on the rotating output element 30. For example, it can be set as shown in the attached figure. Figure 1 , 2 The locking elastic element 43 shown is nested and connected to the elastic element mounting part 33 of the rotating output element 30, or it can be configured as shown in the attached figure. Figure 10 As shown, the locking elastic element 43 and the rotating output element 30 are connected by a plug-in joint.

[0086] In one embodiment of the present invention, a protruding limiting step 32 is formed on the rotating output member 30. The limiting step 32 is disposed on the pivoting paths of the first locking member 41 and the second locking member 42 respectively. The first locking member 41 and the second locking member 42 are respectively disposed between the corresponding elastic arm 431 and the corresponding limiting step 32. The elastic arm 431 abuts against the first locking member 41 and the second locking member 42 to provide elastic force. The limiting step 32 is used to restrict the rotation of the first locking member 41 in one direction.

[0087] In this embodiment, the limiting step 32 and the locking elastic element 43 together limit the rotation range of the first locking element 41 and the second locking element 42, making the movement of the first locking element 41 and the second locking element 42 more stable. The design of the limiting step 32 will form an included angle between the first locking element 41 and the second locking element 42 after installation, which facilitates the placement of the drive unit between the first locking element 41 and the second locking element 42, and also facilitates the first locking element 41 and the second locking element 42 to cooperate with the appropriate limiting teeth, thereby improving assembly efficiency.

[0088] As one embodiment of the present invention, see Appendix Figures 4 to 6 The locking and limiting member 11 has a plurality of limiting teeth 111 formed around the axis of the rotating output member 30. The limiting teeth 111 include a first side surface 1111 and a second side surface 1112 that are circumferentially opposite each other. When no external driving force is applied to the rotating input member 20, the first locking member 41 abuts against the entire side surface of the first side surface 1111 of one of the limiting teeth 111, and the second locking member 42 abuts against the entire side surface of the second side surface 1112 of one of the limiting teeth 111; or, the first locking member 41 abuts against half of the side surface of the first side surface 1111 of one of the limiting teeth 111, and the second locking member 42 abuts against half of the side surface of the second side surface 1112 of one of the limiting teeth 111.

[0089] In this embodiment, the locking and limiting member 11 cooperates with the first locking member 41 and the second locking member 42 through the limiting tooth 111. When set, the first locking member 41 and the second locking member 42 cooperate with the sidewalls of the limiting tooth 111 in opposite circumferential directions to achieve self-locking effects in different directions.

[0090] In this embodiment, the limiting tooth 111 forms a one-way self-locking structure with the first locking member 41 and the second locking member 42, similar to the structure of a ratchet and pawl. That is, the first locking member 41 and the second locking member 42 can only restrict the rotation of the rotary output member 30 in a single direction. For example, the first locking member 41 is used to restrict the rotation of the rotary output member 30 in the forward direction. When the rotary output member 30 rotates in the reverse direction, the first locking member 41 will swing under the action of the limiting tooth 111 and will not restrict the reverse rotation of the rotary output member 30. Similarly, the working principle of the second locking member 42 is similar. Through the mutual cooperation of the first locking member 41 and the second locking member 42, a two-way self-locking effect is achieved, and it is convenient for the rotary input member 20 to drive the rotary output member 30.

[0091] In one embodiment of the present invention, the locking unit 40 includes at least two sets of first locking members 41 and second locking members 42, one set of which abuts against each other on all sides, and the other set of which abuts against each other on half sides. With this configuration, rotating the input member 20 by approximately half a tooth angle can create a new self-locking mechanism with a smaller locking angle.

[0092] As one embodiment of the present invention, referring to the accompanying drawings, the plurality of locking units 40 can be divided into at least a first locking group and a second locking group. When the first locking member 41 and the second locking member 42 in the first locking group abut against the root of the first side 1111 and the root of the second side 1112 (i.e., the full side) of the limiting tooth 111, the first locking member 41 and the second locking member 42 in the second locking group respectively limit the middle part (i.e., the half side) of the tooth height of the first side 1111 and the second side 1112 of the limiting tooth 111.

[0093] In this embodiment, the multiple locking units 40 are divided into a first locking group (Group A) and a second locking group (Group B). The structures of the two groups are the same, except that their positions are different. Referring to the attached drawings, in this embodiment, Group A is in the locked state, while Group B is in the pre-locked state (the locking ends of the first locking member 41 and the second locking member 42 in Group B correspond to approximately 1 / 2 tooth height of the limiting tooth 111, respectively). This reduces the self-locking misalignment during use. For example, when the external driving force disappears, the rotation input member 20 and the first locking member... 41 or the second locking element 42 will spring back and reset under the action of the locking elastic element 43. During the springback process (since it is not yet locked), the rotary output element 30 will inevitably generate a certain degree of reverse rotation under the action of the load. If there is only the A group locking unit 40, then the reverse return stroke of the rotary output element 30 corresponds to the angle of a limit tooth 111. When both A and B groups exist, the corresponding formation during the reverse return process of the rotary output element 30 is only the angle of a limit tooth 111, which is equivalent to a reduction of half of the return virtual position.

[0094] Of course, it is conceivable that, in order to further improve the locking accuracy, the multiple locking units 40 can be divided into more locking groups, such as a total of N groups. In this case, during the design, the tooth height of a limit tooth 111 can be evenly divided into N positions, and the N locking groups correspond one-to-one with the N positions of the limit tooth 111. This can maximize the improvement of locking accuracy.

[0095] In the design, the number of locking groups is generally related to the size of the locking limit member 11. The larger the size of the locking limit member 11, the more teeth can be designed, and the more locking groups can be set accordingly. The locking accuracy will also be higher. In different scenarios, the number of locking groups can be reasonably designed by combining the size of the components and the application requirements.

[0096] As attached Figures 4 to 6 As shown, one embodiment of the present invention is configured with four locking units 40, including two first locking groups (group A) arranged symmetrically and two second locking groups (group B) arranged symmetrically.

[0097] In this embodiment, the bidirectional self-locking mechanism initially positions the rotary output component 30 in a bidirectional self-locking state, as shown in the attached diagram. Figure 4 At this time, since the first locking member 41 and the second locking member 42 form different directions of limitation with the different limiting teeth 111 of the locking limiting member 11, the rotating output member 30 cannot rotate.

[0098] When the rotary output component 30 needs to output a forward (clockwise) rotational driving force, the rotary output component 30 needs to rotate in the forward direction. At this time, the rotary input component 20 will first push the first locking component 41 to the position shown in the image. Figure 5 In the forward unlocked state shown, the first locking member 41 cannot block the forward rotation of the rotary output member 30, thus allowing for smooth output of forward rotational driving force. Conversely, when a reverse (counterclockwise) rotational driving force is required, the rotary output member 30 needs to rotate in the opposite direction. In this case, the rotary input member 20 will first push the second locking member 42 to the position shown. Figure 6 The reverse unlock state is shown, at which point the rotary output component 30 can rotate in the reverse direction.

[0099] As one embodiment of the present invention, see Appendix Figure 1 , 2 3. The rotary input component 20, the locking and limiting component 11, and the rotary output component 30 are fitted together from the outside to the inside. The limiting tooth 111 protrudes from the inner surface of the locking and limiting component 11. The first locking component 41 and the second locking component 42 are disposed on the inner side of the locking and limiting component 11 and are opposite to the limiting tooth 111.

[0100] In this embodiment, the locking limit member 11 is configured as an internal gear ring structure, and the installation structure in which the rotating input member 20, the locking limit member 11, and the rotating output member 30 are fitted together internally and externally can reduce the overall volume of the bidirectional self-locking mechanism and improve the compactness of the structure.

[0101] The structure of the internal gear ring allows for more teeth within the same dimensions, resulting in a smaller self-locking angle and more precise positioning.

[0102] As one embodiment of the present invention, see Appendix Figure 10 The rotating output component 30 is fitted onto the outer side of the locking and limiting component 11, and the limiting tooth 111 protrudes from the outer surface of the locking and limiting component 11. The first locking component 41 and the second locking component 42 are disposed on the outer side of the locking and limiting component 11 and are opposite to the limiting tooth 111.

[0103] In this embodiment, the locking and limiting member 11 is configured as an external toothed ring, and can be integrated with the fixing base 10. See attached drawing. Figure 10The corresponding first locking member 41 and second locking member are located on the outside of the locking limit member 11 (on one side of the limit tooth 111). At this time, the rotary input member 20 is pressed against the fixed seat 10 by the clamping nut 50. It should be noted that the clamping nut here only limits the axial position of the rotary input member 20, and the rotary input member 20 can rotate.

[0104] In this embodiment, the locking unit 40 can be configured as multiple sets. Multiple sets of locking units 40 can improve the load capacity of the self-locking structure and can be applied to scenarios with large load torque, such as lifting.

[0105] As one embodiment of the present invention, see Appendix Figures 1 to 3 The fixed base 10 includes a base body and an assembly connection part 12. The locking and limiting member 11 is formed on the base body, and the mounting hole 13 is formed on the base body. The rotating output member 30 is rotatably disposed in the mounting hole 13, and the rotating input member 20 is rotatably disposed on the base body. The assembly connection part 12 is used for assembly connection with external components.

[0106] In this embodiment, the fixed base 10 and the locking limit member 11 are an integral structure. The rotary input member 20 and the rotary output member 30 are respectively installed on the fixed base 10. The assembly connection part 12 is used to realize the assembly connection with external fasteners (such as the operating handle of the suction device). When setting it, the assembly connection part 12 can be set as a snap-fit ​​structure, a plug-in structure, or a screw connection, etc.

[0107] As one embodiment of the present invention, see Appendix Figure 11 The rotary input component 20 includes an input body 23 and a first latch 241 unit 24 and a second latch 251 unit 25 disposed on the input body 23. The first latch 241 unit 24 and the second latch 251 unit 25 are distributed radially at intervals and respectively engage with the fixed base 10 and the rotary output component 30.

[0108] In this embodiment, the rotary input component 20 can be connected to the fixed base 10 and the rotary output component 30 respectively by snap-fit. In this way, the entire bidirectional self-locking mechanism does not need to use a separate connecting component (such as a screw), which can improve the convenience of assembly and improve the assembly efficiency of the bidirectional self-locking mechanism.

[0109] In actual setup, the first latch 241 unit 24 may include multiple circumferentially distributed first latches 241, and the second latch 251 unit 25 may include multiple circumferentially distributed second latches 251, thereby improving the reliability of the connection.

[0110] A second aspect of the invention discloses an aspirator, see appendix. Figures 7 to 9The device includes a suction assembly and an operating handle. The suction assembly includes a tiltable suction head 71 and a transmission assembly 80 for driving the suction head 71 to tilt. The suction device also includes the bidirectional self-locking mechanism described in the first aspect. The bidirectional self-locking mechanism is disposed on the operating handle, and the rotating output component 30 of the bidirectional self-locking mechanism is connected to the transmission assembly 80.

[0111] The transmission assembly 80 includes two flexible pulling members 81 (usually arranged on opposite sides of the suction head 71) spaced apart from each other. One end of each flexible pulling member 81 is connected to the suction head 71, and the other end is connected to the rotary output member 30. The operating handle includes a handle housing 60 with an installation space formed inside. The fixing base 10 is disposed inside the handle housing 60, and the rotary input member 20 is disposed outside the handle housing 60. The transmission assembly 80 also includes a winding post 82, which is coaxially arranged and fixedly connected to the rotary output member 30. The flexible pulling members 81 are connected to the winding post 82.

[0112] In this embodiment, the suction head 71 of the aspirator can be tilted. During use, the angle of the suction head 71 can be flexibly adjusted according to the needs of use to achieve flushing or suction of different patient locations, which can improve surgical efficiency.

[0113] In this embodiment, the transmission component 80 achieves the swaying of the suction head 71 through the axial differential motion of the flexible pulling member 81 (generally a rope or metal wire).

[0114] In this embodiment, the axial differential movement of the flexible pulling member 81 is achieved through the bidirectional self-locking mechanism of the first aspect. One end of each of the two flexible pulling members 81 is fixed to the winding post 82 from opposite sides. The transmission assembly 80 may also include a clamp 83, which is used to fix the flexible pulling member 81 to the winding post 82. The winding post 82 and the rotary output member 30 are coaxially arranged and fixedly connected. The winding post 82 and the rotary output member 30 rotate synchronously. When it is necessary to make the suction head 71 swing, the operator only needs to twist the rotary input member 20 (to facilitate the twisting of the rotary input member 20). (A rubber sleeve 22 can be wrapped around the outside of the rotary input component 20 to improve the operating feel and friction.) The axial differential movement of the flexible traction component 81 can be achieved by rotating the output component 30 and the winding column 82, thereby realizing the swing of the suction head 71. In this embodiment, after the operator releases the rotary input component 20, the suction head 71 can be locked in the swing position, without the need for the operator to continuously operate to maintain the position of the suction head 71, ensuring the stability of the suction head 71 in the working position. For example, the swing suction can be better utilized to stably realize the functions of tissue picking, separation or picking.

[0115] Furthermore, the bidirectional self-locking mechanism in this embodiment can be designed independently and modularly, serving as a component with independent functions and capable of outputting rotational driving force. During assembly, it can be pre-assembled independently of other modules of the surgical instrument and can be debugged separately. Moreover, during the assembly of the whole machine, it is not affected by the installation of other external accessories, making it easy to replace and beneficial for maintaining precision and mass production.

[0116] The handle housing 60 of the present invention includes a main body 61 and a gripping part 62. The gripping part 62 is disposed on the rear bottom side of the main body 61, and the rotary input member 20 protrudes from the bottom surface of the main body 61 and is located on the front side of the gripping part 62.

[0117] The suction device also includes a flushing and suction assembly, which includes a flushing and suction operating member 72 for controlling the activation of the flushing and suction action. The flushing and suction operating member is disposed on the top of the handle housing 60.

[0118] The suction device provided by the present invention can accurately position the suction head 71 after it swings during use, avoid the wobbling of the suction head 71 during use, improve the quality of surgery, and the bidirectional self-locking mechanism can be modularly assembled with surgical instruments, which can improve assembly efficiency and ensure assembly quality.

[0119] Furthermore, in this embodiment, the operating components (flushing and suction operating component 72 and rotary input component 20) on the handle are respectively set at different positions on the operating handle. In this way, during actual operation, they can be operated by the index finger and thumb respectively, which is convenient and enables one-handed operation.

[0120] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A bidirectional self-locking mechanism, comprising a fixed base (10), and a rotary input component (20) and a rotary output component (30) rotatably disposed on the fixed base (10), wherein the rotary input component (20) is capable of driving the rotary output component (30) to rotate, characterized in that, The bidirectional self-locking mechanism further includes at least two sets of locking units (40), the fixed base (10) includes a locking limit member (11), and the locking unit (40) is disposed on the rotating output member (30); The locking unit (40) includes a first locking member (41) and a second locking member (42). The locking limiting member (11) has a plurality of circumferentially distributed limiting teeth (111). When no external driving force is applied to the rotary input member (20), the first locking member (41) and the second locking member (42) respectively engage with different limiting teeth (111) to limit the rotation of the rotary output member (30). One set of the locking units (40) abuts against the entire side of the limiting tooth (111), and the other set abuts against half of the side of the limiting tooth (111). The rotary input component (20) can unlock the locking limit component (11) and the locking unit (40) when rotated by an external driving force, and drive the rotary output component (30) to rotate.

2. The bidirectional self-locking mechanism according to claim 1, characterized in that, When no external driving force is applied to the rotary input member (20), the first locking member (41) and the second locking member (42) are used to restrict the rotary output member (30) from rotating in the forward and reverse directions, respectively; During the forward rotation of the rotary input component (20), the rotary input component (20) can unlock the locking limit component (11) and the first locking component (41) and drive the rotary output component (30) to rotate in the forward direction. When the rotary input component (20) rotates in the reverse direction, the rotary input component (20) can unlock the locking limit component (11) and the second locking component (42) and drive the rotary output component (30) to rotate in the reverse direction.

3. The bidirectional self-locking mechanism according to claim 2, characterized in that, The first locking member (41) and the second locking member (42) are pivotally disposed on the rotary output member (30), and a driving part (21) is formed on the rotary input member (20), the driving part (21) being circumferentially opposite to the first locking member (41) and the second locking member (42); When the rotary input member (20) rotates in the forward direction, the drive unit (21) can sequentially drive the first locking member (41) to rotate and release the forward limiting cooperation between the first locking member (41) and the locking limit member (11), and drive the rotary output member (30) to rotate in the forward direction; When the rotary input member (20) rotates in the opposite direction, the drive unit (21) can sequentially drive the second locking member (42) to rotate and release the reverse limiting engagement between the second locking member (42) and the locking limit member (11), and drive the rotary output member (30) to rotate in the opposite direction.

4. The bidirectional self-locking mechanism according to claim 3, characterized in that, The rotary output component (30) has a drive engagement portion (31) that cooperates with the drive portion (21). The drive engagement portion (31) and the drive portion (21) are circumferentially opposite to and spaced apart. The rotation of the rotary input component (20) is driven by the cooperation of the drive portion (21) and the drive engagement portion (31). During the rotation of the rotary input component (20), The drive unit (21) sequentially engages with the first locking member (41) / the second locking member (42) and the drive engagement unit (31).

5. The bidirectional self-locking mechanism according to claim 2, characterized in that, The locking unit (40) further includes a locking elastic member (43), which is disposed on the rotary output member (30) and located in the interval between the rotary input member (20) and the rotary output member (30). A plurality of elastic arms (431) are formed on the locking elastic member (43). The first locking member (41) and the second locking member (42) are respectively connected to the plurality of elastic arms (431). The elastic arm (431) is configured to provide elastic force to the corresponding first locking member (41) and second locking member (42) to make them tend to cooperate with the locking limit member (11), so that the second end of the first locking member (41) and the second locking member (42) can automatically reset to the position that cooperates with the locking limit member (11) without the input of external driving force.

6. The bidirectional self-locking mechanism according to claim 5, characterized in that, The rotating output member (30) has a protruding limiting step (32) formed on it. The limiting step (32) is disposed on the pivot path of the first locking member (41) and the second locking member (42) respectively. The first locking member (41) and the second locking member (42) are respectively disposed between the corresponding elastic arm (431) and the corresponding limiting step (32). The limiting step (32) is used to restrict the first locking member (41) from rotating in one direction.

7. The bidirectional self-locking mechanism according to any one of claims 2 to 6, characterized in that, The locking and limiting member (11) has a plurality of limiting teeth (111) formed around the axis of the rotating output member (30), the limiting teeth (111) including a first side surface (1111) and a second side surface (1112) opposite each other in the circumferential direction. Without external driving force applied to the rotary input (20), in one set of locking units, the first locking member (41) abuts against the entire side of the first side (1111) of one of the limiting teeth (111), and the second locking member (42) abuts against the entire side of the second side (1112) of one of the limiting teeth (111); in another set of locking units, the first locking member (41) abuts against half of the first side (1111) of one of the limiting teeth (111), and the second locking member (42) abuts against half of the second side (1112) of one of the limiting teeth (111).

8. The bidirectional self-locking mechanism according to claim 1, characterized in that, The locking unit (40) further includes a locking elastic member (43) disposed on the rotating output member (30). The locking elastic member (43) is connected to or abuts against the first locking member (41) and the second locking member (42) respectively, so as to provide locking elastic force.

9. The bidirectional self-locking mechanism according to claim 1, characterized in that, The rotary input component (20), locking limit component (11), and rotary output component (30) are fitted together from the outside to the inside. The limiting tooth (111) protrudes from the inner surface of the locking limit component (11). The first locking component (41) and the second locking component (42) are disposed on the inner side of the locking limit component (11) and opposite to the limiting tooth (111); or, The rotating output component (30) is fitted onto the outside of the locking limit component (11), the limiting tooth (111) protrudes from the outer surface of the locking limit component (11), and the first locking component (41) and the second locking component (42) are disposed on the outside of the locking limit component (11) and opposite to the limiting tooth (111).

10. The bidirectional self-locking mechanism according to any one of claims 1 to 6, characterized in that, The fixed base (10) includes a base body and an assembly connection part (12). The locking limit member (11) is formed on the base body, and the mounting hole (13) is formed on the base body. The rotating output member (30) is rotatably disposed in the mounting hole (13), and the rotating input member (20) is rotatably disposed on the base body. The assembly connection part (12) is used for assembly connection with external components.

11. The bidirectional self-locking mechanism according to any one of claims 1 to 6, characterized in that, The rotary input component (20) includes an input body (23) and a first latching unit (24) and a second latching unit (25) disposed on the input body (23). The first latching unit (24) and the second latching unit (25) are distributed radially at intervals and respectively engage with the fixed base (10) and the rotary output component (30).

12. A suction device comprising a suction assembly and an operating handle, the suction assembly including a tiltable suction head (71) and a transmission assembly for driving the suction head (71) to tilt, characterized in that, The suction device further includes a bidirectional self-locking mechanism as described in any one of claims 1 to 11, the bidirectional self-locking mechanism being disposed on the operating handle, and the rotating output component (30) of the bidirectional self-locking mechanism being drively connected to the transmission assembly.

13. The suction device according to claim 12, characterized in that, The transmission assembly includes flexible pulling members (81) arranged at relatively intervals. One end of the flexible pulling member (81) is connected to the suction head (71), and the other end of the flexible pulling member (81) is connected to the rotary output member (30). The operating handle includes a handle housing (60), and the rotary input member (20) is disposed outside the handle housing (60). The transmission assembly also includes a winding post (82), which is coaxially arranged and fixedly connected to the rotary output member (30).

14. The suction device according to claim 13, characterized in that, The handle housing (60) includes a main body (61) and a grip (62). The grip (62) is disposed on the rear bottom side of the main body (61). The rotary input component (20) protrudes from the bottom surface of the main body (61) and is located on the front side of the grip (62). The suction device also includes a flushing and suction assembly, which includes a flushing and suction operating member (72) for controlling the activation of the flushing and suction action. The flushing and suction operating member (72) is disposed on the top of the handle housing (60).

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