Locking mechanism of positioning element, positioning element, surgical instrument and surgical system

Abstract

The present application discloses a locking mechanism of a positioning element, a positioning element, a surgical instrument and a surgical system. The locking mechanism of the positioning element includes a body and a locking member; a housing portion is provided on the body, and the housing portion is used to accommodate at least a portion of the positioning element; the locking member includes a locking switch, a sliding assembly and a first elastic member, the locking switch is connected to the body, the sliding assembly is constructed to be able to move axially, and the first elastic member is arranged between the sliding assembly and the locking switch; the locking switch is constructed to have a switchable locking state and an active state, in the locking state, the locking switch pushes the first elastic member to move the second end of the sliding assembly to the housing portion to abut against the positioning element for positioning, and in the active state, the sliding assembly withdraws from the housing portion. The present application can simplify the locking operation of the positioning element, and the locking force applied to the positioning element can be adjusted, so as to effectively lock the positioning element.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and in particular, relates to a locking mechanism of a positioning element, a positioning element, a surgical instrument and a surgical system. Background Art

[0002] With the development of science and technology, positioning technology is increasingly used in the medical device industry. In order to achieve the positioning of the target object, it is usually necessary to set a positioning element on the target object or reference position. By obtaining the position of the positioning element, the position of the target object or the positioning element on the target object can be determined.

[0003] However, the inventors of this application have discovered that the locking operation during installation of the positioning element in the related art is relatively complicated, and the locking force applied to the positioning element after the locking operation is completed cannot be adjusted. If the locking force is too small, the installation may become loose. Summary of the invention

[0004] The embodiments of the present application provide a locking mechanism of a positioning element, a positioning element, a surgical instrument and a surgical system, which can simplify the locking operation of the positioning element, the locking force applied to the positioning element can be adjusted, and the positioning element can be effectively locked.

[0005] In the first aspect, an embodiment of the present application provides a locking mechanism for a positioning element, wherein the locking mechanism for the positioning element comprises a main body and a locking member; a housing portion is provided on the main body, and the housing portion is used to accommodate at least a portion of the positioning element; the locking member comprises a locking switch, a sliding assembly and a first elastic member, the locking switch is connected to the main body, the sliding assembly is constructed to be able to move axially, and the first elastic member is arranged between the sliding assembly and the locking switch; wherein the locking switch is constructed to have a switchable locking state and an active state, wherein in the locked state, the locking switch pushes the first elastic member to move the second end of the sliding assembly to the housing portion to abut against the positioning element for positioning, and in the active state, the sliding assembly withdraws from the housing portion.

[0006] According to some embodiments of the first aspect of the present application, when the locking switch is switched between an active state and a locked state, the first elastic member is deformed to apply a locking force to the sliding assembly to fix the positioning element.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the sliding assembly is configured to be adjustable in length.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, the sliding assembly includes a first component and a second component, and the first component and the second component are engaged and the engagement length is adjustable.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the first component is a guide sleeve, the second component is a top screw, and the guide sleeve is threadedly connected to the top screw.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the sliding assembly also includes a guide shaft, a first end of the guide shaft is connected to the locking switch, and a second end of the guide shaft is facing the direction of the accommodating portion; the guide sleeve is slidably mounted on the guide shaft, and the first end of the guide sleeve is abutted against a part of the locking switch; and a top screw is detachably connected to the second end of the guide sleeve, and the top screw corresponds to the accommodating portion.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the first elastic member is a disc spring, and a washer is provided between the disc spring and the locking switch.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the guide sleeve is in a cylindrical structure, the first end of the guide sleeve has an end plate, and the end plate is provided with a mounting hole for the guide shaft to pass through, the second end of the guide sleeve is open, and the top screw is connected to the second end of the guide sleeve.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, a first boss is protruded radially from the second end of the guide shaft, and a diameter of the first boss is larger than a diameter of the mounting hole.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the locking member further includes a second elastic member, the second elastic member is sleeved on the guide shaft, and the second elastic member is located between the end plate and the first boss.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the second elastic member is a corrugated spring.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the locking switch includes a mounting shaft and a cam handle, and the mounting shaft is rotatably connected to the cam handle.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the cam handle includes a cam portion, and a plane is formed on the outer peripheral surface of the cam portion at a position with the largest distance from its rotation axis.

[0018] In a second aspect, an embodiment of the present application provides a positioning element, wherein the positioning element is used to provide positioning information; the positioning element is locked and positioned in a locking mechanism of the positioning element provided in any embodiment of the first aspect.

[0019] In a third aspect, an embodiment of the present application provides a surgical instrument, comprising: a tracing part, the tracing part comprising a plurality of positioning elements as provided in the second aspect; and a functional part, the functional part having a predetermined positional relationship with the tracing part, the functional part being used to cooperate with the anatomical structure during surgery.

[0020] In a fourth aspect, an embodiment of the present application provides a surgical system, comprising: an execution part and a positioning part, the execution part being used to engage a surgical tool, the positioning part being used to be set on the execution part or the surgical tool to indicate a position, and the positioning part comprising a plurality of positioning elements as provided in the third aspect.

[0021] In the locking mechanism, positioning element, surgical instrument and surgical system of the positioning element of the embodiment of the present application, the locking mechanism of the positioning element can accommodate the positioning element by providing a receiving portion on the main body, and by providing a locking component having a locking switch, a sliding assembly and a first elastic member on the main body. When the positioning element needs to be positioned, the locking switch is operated to drive the sliding assembly to move, and the second end of the sliding assembly moves toward the direction close to the receiving portion until it contacts the positioning element and presses it against the receiving portion, thereby achieving the locking positioning of the positioning element. The locking force applied by the sliding assembly to the positioning element can be automatically and elastically adjusted through the first elastic member, thereby adjusting the locking degree of the positioning element, making it difficult for the positioning element to be displaced, thereby promoting effective locking of the positioning element. At the same time, in the locking mechanism, positioning element, surgical instrument and surgical system of the positioning element of the embodiment of the present application, the structure of the locking mechanism of the positioning element is very simple, which is convenient for disassembly and installation of the positioning element. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a locking mechanism of a positioning element in some embodiments of the present application;

[0024] Figure 2 An exploded view of a locking member of a locking mechanism of a positioning element according to some embodiments of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the locking mechanism of the positioning element of some embodiments of the present application when it is not locked;

[0026] Figure 4 For along Figure 3 Schematic diagram of the cross section along the AA line;

[0027] Figure 5 This is a schematic diagram of the structure of the locking mechanism of the positioning element of some embodiments of the present application when it is not locked;

[0028] Figure 6 For along Figure 5 Schematic diagram of the cross section of the middle BB line;

[0029] Figure 7 An exploded view of a guide shaft and a top screw of a sliding assembly of a locking member of a locking mechanism of a positioning element in some embodiments of the present application;

[0030] Figure 8 This is a schematic diagram of the structure when a positioning element is placed in the locking mechanism of the positioning element of some embodiments of the present application but is not locked;

[0031] Fig. 9 It is a schematic diagram of the structure of the locking mechanism of the positioning element of other embodiments of the present application when the positioning element is placed in it but not locked;

[0032] Fig.10 It is a schematic structural diagram of the locking mechanism of the positioning element of some embodiments of the present application when locked;

[0033] Fig.11 For along Fig.10 Schematic diagram of the cross section along the CC line.

[0034] Description of Figure Numbers:

[0035] 1. Main body; 11. First mounting portion; 111. Accommodating hole; 1111. Inclined surface; 112. Accommodating portion; 113. Second boss; 114. Connecting ear; 12. Second mounting portion; 13. Connecting arm; 2. Locking member; 21. Locking switch; 211. Mounting shaft; 212. Cam handle; 2121. Handle portion; 2122. Cam portion; 21221. Plane; 22. Sliding assembly; 221. Guide shaft; 2211. First boss; 222. Guide sleeve; 2221. End plate; 2222. Mounting hole; 223. Top screw; 23. First elastic member; 24. Washer; 25. Second elastic member; 3. Positioning element. DETAILED DESCRIPTION

[0036] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0038] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0040] As mentioned above, the inventors of the present application found that the installation of the positioning elements in the related technology is not firm enough, and the positioning elements are prone to relative displacement with the structure for implementing the installation, resulting in low positioning accuracy of the positioning elements; in order to solve the problem of low positioning accuracy, relevant technical personnel have made many improvements to the existing installation structure. In the process, it was found that although the firmness of the installation of the positioning elements can be improved to a certain extent, it also brings new problems, such as complex structure and large size; there is no shock-proof loose structure, and the shock-proof loose performance can only be improved by increasing the pre-tightening force, and increasing the pre-tightening force requires the use of a wrench or by increasing the handle size, which is not suitable for some situations where the space is compact and it is inconvenient to use a wrench; the processing and assembly accuracy requirements are high, and there is no wear compensation, resulting in excessively high processing costs and too short service life.

[0041] Therefore, in view of the above problems, the embodiments of the present application provide a locking mechanism for a positioning element, a positioning element, a surgical instrument and a surgical system, which can solve the technical problems existing in the related technologies such as low positioning accuracy, complex structure, no anti-shock loose structure, high requirements for processing and assembly accuracy, and no wear compensation.

[0042] The technical concept of the embodiment of the present application is that: the positioning element is arranged on the locking mechanism of the positioning element, and the locking mechanism of the positioning element can accommodate the positioning element by arranging a receiving portion on the main body, and by arranging a locking component having a locking switch, a sliding assembly and a first elastic member on the main body. When the positioning element needs to be positioned, the locking switch is operated to drive the sliding assembly to move, and the second end of the sliding assembly moves toward the direction close to the receiving portion until it contacts the positioning element and presses it against the receiving portion, thereby realizing the locking positioning of the positioning element, and the locking force applied by the sliding assembly to the positioning element can be automatically and elastically adjusted through the first elastic member, so that the locking degree of the positioning element can be adjusted, so that the positioning element is not easily displaced, and the positioning element is effectively locked; at the same time, the structure of the locking mechanism of the positioning element in the embodiment of the present application is very simple, which is convenient for disassembly and installation of the positioning element.

[0043] The locking mechanism of the positioning element provided in the embodiment of the present application is first introduced below.

[0044] like Figures 1 to 11 As shown, an embodiment of the present application provides a locking mechanism of a positioning element, the locking mechanism of the positioning element includes a main body 1 and a locking member 2; a receiving portion 112 is provided on the main body 1, and the receiving portion 112 is used to receive at least a portion of the positioning element 3; the locking member 2 includes a locking switch 21, a sliding component 22 and a first elastic member 23, the locking switch 21 is connected to the main body 1, and the sliding component 22 is constructed to be able to move in the circumferential direction, specifically, the first end of the sliding component 22 is connected to the locking switch 21, the second end of the sliding component 22 is arranged opposite to the receiving portion 112, and the first elastic member 23 is arranged between the sliding component 22 and the locking switch 21; wherein the locking switch 21 is constructed to have a switchable locking state and an active state, in the locked state, the locking switch 21 pushes the first elastic member 23 to move the second end of the sliding component 22 to the receiving portion 112 to abut against the positioning element 3 for positioning, and in the active state, the sliding component 22 withdraws from the receiving portion 112.

[0045] The locking switch 21 can be a toggle switch, a rotary switch, a mechanical switch or an electronic switch; the sliding component 22 as a whole roughly forms a columnar structure. Driven by the locking switch 21, the sliding component 22 can move along its axial direction toward or away from the accommodating portion 112. The second end of the sliding component 22 is used to apply a locking force to the positioning element 3 to achieve the locking positioning of the positioning element 3.

[0046] The locking mechanism of the positioning element provided in the embodiment of the present application, wherein, when the locking switch 21 switches between the active state and the locked state, the first elastic member 23 is deformed to apply a locking force to the sliding component 22 to fix the positioning element 3, while preventing the locking switch 21 from rigidly contacting the first end of the sliding component 22.

[0047] The locking force applied to the positioning element 3 can be adjusted by the elastic deformation state of the first elastic member 23 , thereby ensuring that the positioning element 3 is effectively locked.

[0048] In the locking mechanism of the positioning element provided in the embodiment of the present application, the sliding assembly 22 is configured to be adjustable in length to accommodate positioning elements 3 of different sizes, which can also be understood as being able to adjust the locking force applied to the positioning element 3 from another aspect.

[0049] The locking mechanism of the positioning element provided in the embodiment of the present application, wherein the sliding assembly 22 includes a first component and a second component, the first component and the second component are engaged with each other and the engagement length is adjustable, so as to achieve adjustable length of the sliding assembly 22.

[0050] Specifically, the first component is the guide sleeve 222, and the second component is the top screw 223. The guide sleeve 222 is threadedly connected to the top screw 223. By adjusting the depth of the threaded connection between the guide sleeve 222 and the top screw 223, the connection length between the two can be adjusted, thereby adjusting the overall length of the sliding assembly 22.

[0051] like Figure 2 As shown, the locking mechanism of the positioning element provided in the embodiment of the present application, the sliding component 22 also includes a guide shaft 221; the first end of the guide shaft 221 is connected to the locking switch 21, and the second end of the guide shaft 221 is facing the direction of the accommodating portion 112; the guide sleeve 222 is slidably mounted on the guide shaft 221, and the first end of the guide sleeve 222 is abutted against a part of the locking switch 21; the top screw 223 is detachably connected to the second end of the guide sleeve 222, and the top screw 223 corresponds to the accommodating portion 112.

[0052] The guide shaft 221 is provided to provide a guide for the moving direction of the guide sleeve 222 and the top screw 223, so that the guide sleeve 222 drives the top screw 223 to move toward or away from the accommodating portion 112; the first end of the guide shaft 221 is detachably connected to the locking switch 21, so as to facilitate the replacement of components separately;

[0053] The first end of the guide sleeve 222 abuts against a portion of the locking switch 21. When the locking switch 21 is adjusted, the locking switch 21 can push the guide sleeve 222 to drive the top screw 223 to move along the guide shaft 221 toward the accommodating portion 112, thereby achieving locking and positioning of the positioning element 3.

[0054] It should be noted that the guide shaft 221 is only an optional method of the embodiment of the present application. The moving direction of the guide sleeve 222 and the top screw 223 can also be guided by other methods such as setting a guide hole inside the main body 1, and the present application is not limited to this.

[0055] The first elastic member 23 is sleeved on the guide shaft 221, and the first elastic member 23 is located between the first end of the guide sleeve 222 and the locking switch 21; the locking switch 21 is against the first elastic member 23, and the first elastic member 23 is against the first end of the guide sleeve 222. When the locking switch 21 is adjusted, the locking switch 21 applies a force on the first elastic member 23 and transmits it to the guide sleeve 222 through the first elastic member 23. Through the elastic deformation of the first elastic member 23, the moving stroke of the guide sleeve 222 and the top screw 223 can be increased, and the rigid contact between the guide sleeve 222 and the locking switch 21, which leads to the locking between the two, can be avoided.

[0056] Specifically, the first elastic member 23 is a disc spring, which is small in size and can generate a large preload force with a very small deformation. By providing the disc spring, the structure of the locking member 2 can be made more compact while ensuring that the locking member 2 can provide sufficient preload force. A washer 24 is provided between the disc spring and the locking switch 21. The setting of the washer 24 can provide a contact surface for the disc spring and the locking switch 21 to reduce the wear of the disc spring and the locking switch 21.

[0057] like Figure 2 As shown, the locking mechanism of the positioning element provided in the embodiment of the present application, the guide sleeve 222 is a cylindrical structure, the first end of the guide sleeve 222 has an end plate 2221, and the end plate 2221 is provided with a mounting hole 2222 for the guide shaft 221 to pass through, the second end of the guide sleeve 222 is open, the top screw 223 is connected to the second end of the guide sleeve 222 and closes the second end of the guide sleeve 222; the inner wall of the guide sleeve 222 is provided with an internal thread, the outer peripheral surface of the top screw 223 is provided with an external thread, and the external thread of the top screw 223 is at least partially screwed with the internal thread of the guide sleeve 222.

[0058] The guide sleeve 222 is coaxially assembled with the guide shaft 221 through the mounting hole 2222; the top screw 223 is threadedly connected to the guide sleeve 222. By adjusting the screwing depth of the top screw 223 at the second end of the guide sleeve 222, the working stroke of the first elastic member 23 can be adjusted to obtain the desired locking force. In addition, in order to obtain the desired preload force, it is not necessary to achieve it through the high processing accuracy of the structure itself. When the locking mechanism is worn during use, resulting in insufficient locking force and insufficient to lock the positioning element, the desired locking force can also be obtained by adjusting the screwing depth of the top screw 223 at the second end of the guide sleeve 222.

[0059] like Figure 2 , Figure 4 , Figure 6 , Figure 8 and Fig.11 As shown, in the locking mechanism of the positioning element provided in the embodiment of the present application, the second end of the guide shaft 221 is provided with a first boss 2211 along its radial direction, and the diameter of the first boss 2211 is larger than the aperture of the mounting hole 2222 .

[0060] During the process of the guide sleeve 222 moving along the guide shaft 221 toward the direction close to the top screw 223, when the first boss 2211 abuts against the end plate 2221, the guide sleeve 222 reaches the limit position and cannot continue to move in the direction of the top screw 223. In this way, the connection between the guide sleeve 222 and the guide shaft 221 can be maintained while ensuring the stroke of the guide sleeve 222, thereby preventing the guide sleeve 222 from being separated from the guide shaft 221 when unnecessary.

[0061] like Figure 2 , Figure 4 , Figures 6 to 8 and Fig.11 As shown, in the locking mechanism of the positioning element provided in the embodiment of the present application, the locking member 2 also includes a second elastic member 25, the second elastic member 25 is sleeved on the guide shaft 221, and the second elastic member 25 is located between the end plate 2221 and the first boss 2211.

[0062] The two ends of the second elastic member 25 are respectively in contact with the end plate 2221 and the first boss 2211. The guide sleeve 222 compresses the second elastic member 25 in the process of moving along the guide shaft 221 toward the direction close to the accommodating portion 112. The second elastic member 25 can provide a restoring force for the guide sleeve 222. When the locking state is released, the guide sleeve 222 is pushed by the restoring force of the second elastic member 25 to drive the top screw 223 to move in the direction away from the accommodating portion 112. It should be noted that when the shape of the second elastic member 25 is restored to its original state, the guide sleeve 222 and the top screw 223 can completely withdraw from the accommodating portion 112 to ensure that in the next locking and positioning process of the positioning element 3, when the positioning element 3 is placed in the accommodating portion 112, there will be no obstruction to the positioning element 3 due to the fact that part of the guide sleeve 222 and the top screw 223 are still located in the accommodating portion 112.

[0063] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, the locking mechanism of the positioning element provided in the embodiment of the present application, the main body 1 includes a first mounting portion 11, the first mounting portion 11 is open at both ends and hollow inside, and two accommodating holes 111 are opened on the side wall of the first mounting portion 11 near its second end, the two accommodating holes 111 are arranged opposite to each other, and the two accommodating holes 111 and the interior of the first mounting portion 11 are located in the area between the two accommodating holes 111 to form the accommodating portion 112; the second end of the guide shaft 221, the guide sleeve 222, the top screw 223 and the first elastic member 23 are all arranged inside the first mounting portion 11 and are located between the accommodating portion 112 and the first end of the first mounting portion 11, the first end of the guide shaft 221 is connected to the locking switch 21 inside the first mounting portion 11 or outside the first end of the first mounting portion 11, and the top screw 223 can extend to the accommodating portion 112 and abut against the positioning element 3 for positioning, thereby realizing the locking positioning of the positioning element 3.

[0064] When the positioning element 3 is arranged in the accommodating portion 112, it sequentially passes through one of the accommodating holes 111, the area between the two accommodating holes 111 in the first mounting portion 11, and the other accommodating hole 111, and the positioning element 3 is roughly kept at the position to be locked and positioned through the two accommodating holes 111. Then, by adjusting the locking switch 21, the guide sleeve 222 drives the top screw 223 to press and lock the positioning element 3;

[0065] The shapes of the two receiving holes 111 can match the cross-sectional shape of the positioning element 3, so as to improve the matching degree between the outer surface of the positioning element 3 and the hole walls of the two receiving holes 111 during the locking and positioning process, and ensure the uniformity of the force at the contact position between the positioning element 3 and the two receiving holes 111 as much as possible, so as to reduce the damage of the positioning element 3 due to uneven force.

[0066] Alternatively, the inner walls of the two receiving holes 111 near the second end of the first mounting portion 11 are formed as follows: Figure 1 and Figure 3 The V-shaped structure shown in the figure, that is, two inclined surfaces 1111 are formed, the spacing between which gradually decreases toward the second end close to the first mounting portion 11. By setting the two inclined surfaces 1111, the positioning element 3 can be effectively prevented from circumferential rotation, so that the top screw 223 can lock the positioning element 3 in place without applying a large force.

[0067] The guide shaft 221 and the locking switch 21 may be detachably connected, such as threaded connection, or may be fixedly connected, such as interference fit or welding.

[0068] like Fig. 9 As shown, in the locking mechanism of the positioning element provided by another embodiment of the present application, the second elastic member 25 can also be arranged between the second end of the guide sleeve 222 and the second boss 113 .

[0069] Among them, the second boss 113 is protruded on the inner wall of the first mounting portion 11, and the second boss 113 is located on the side of the accommodating portion 112 close to the first end of the first mounting portion 11. At least a part of the top screw 223 can pass through the second boss 113 and extend to the accommodating portion 112.

[0070] That is, the locking member 2 is installed in the various components inside the first mounting portion 11 and the accommodating portion 112, respectively, and are located on both sides of the second boss 113. The second boss 113 can limit the guide sleeve 222 to prevent the guide sleeve 222 from entering the accommodating portion 112 and hindering the positioning element 3 from entering the accommodating portion 112; however, it should be noted that the size of the through area in the middle of the second boss 113 should be sufficient to allow the top screw 223 to pass through, so as to ensure that the top screw 223 can smoothly lock and position the positioning element 3 located in the accommodating portion 112.

[0071] The two ends of the second elastic member 25 are respectively abutted against the second end of the second guide sleeve 222 and the second boss 113. The guide sleeve 222 compresses the second elastic member 25 in the process of moving along the guide shaft 221 toward the direction close to the accommodating portion 112. The second elastic member 25 can provide a restoring force for the guide sleeve 222. When the locking state is released, the guide sleeve 222 is pushed by the restoring force of the second elastic member 25 itself to drive the top screw 223 to move in the direction away from the accommodating portion 112. It should be noted that when the shape of the second elastic member 25 is restored to its original state, the top screw 223 can be completely withdrawn from the accommodating portion 112 to ensure that in the next locking and positioning process of the positioning element 3, when the positioning element 3 is placed in the accommodating portion 112, it will not cause obstruction to the positioning element 3 due to the top screw 223 still partially located in the accommodating portion 112.

[0072] Optionally, in the locking mechanism of the positioning element provided by the present application, the second elastic member 25 is a corrugated spring. The corrugated spring is small in size and has a larger elastic coefficient than an ordinary spiral spring. The use of the corrugated spring can make the structure of the locking member 2 more compact. At the same time, the corrugated spring also has the advantages of low cost and easy installation.

[0073] like Figure 1 , Figure 2 and Figure 4 As shown, the locking mechanism of the positioning element provided in the embodiment of the present application, the locking switch 21 includes a mounting shaft 211 and a cam handle 212, and the mounting shaft 211 and the cam handle 212 are rotatably connected.

[0074] The cam handle 212 includes a handle portion 2121 and a cam portion 2122. A plane is formed on the outer circumferential surface of the cam portion 2122 at a position with the largest distance from its rotation axis.

[0075] Specifically, in order to provide installation space for the guide shaft 221, two cam portions 2122 are provided, and the two cam portions 2122 are parallel to each other. The two cam portions 2122 are rotatably connected to the installation shaft 211, and the rotation axes of the two cam portions 2122 coincide with the axis of the installation shaft 211. The handle portion 2121 is connected between the position on the outer circumference of the two cam portions 2122 with the smallest distance from the rotation axis and the position with the largest distance. The outer circumference of the two cam portions 2122 is directly in contact with the first elastic member 23 or through a gasket 24; both ends of the installation shaft 211 are rotatably connected to the first installation portion 11, and the first end of the guide shaft 221 is connected to the installation shaft 211 between the two cam portions 2122.

[0076] The handle portion 2121 and the cam portion 2122 of the cam handle 212 are integrally formed. When the outer surface of the cam portion 2122 of the cam handle 212 is in contact with the first elastic member 23 at a position where the distance from the rotation axis is the smallest, it can be regarded as the initial state of the cam handle 212. At this time, the positioning element 3 is not locked and positioned. When the positioning element 3 needs to be locked and positioned, the handle portion 2121 is pulled to make the cam portion 2122 gradually rotate to the position on its outer surface where the distance from the axis is the largest and the cam portion 2122 is in contact with the first elastic member 23. At this time, it can be regarded as the locked state of the cam handle 212. In this process, the first elastic member 23 is used to guide the guide sleeve 2 The first end of the guide sleeve 22 is forced to apply force, and the guide sleeve 222 is forced to drive the top screw 223 to move toward the accommodating portion 112, and the top screw 223 applies a locking force to the positioning element 3 located in the accommodating portion 112, so as to realize the locking and positioning of the positioning element 3; when it is necessary to release the locking and positioning, the handle portion 2121 is pulled in the opposite direction to return the cam handle 212 to the initial state. At this time, the cam portion 2122 no longer applies force to the first end of the guide sleeve 222, and the second elastic member 25 applies a force to the guide sleeve 222 to move it in a direction away from the accommodating portion 112, and the guide sleeve 222 drives the top screw 223 to move in a direction away from the accommodating portion 112 until the shape of the second elastic member 25 is restored to its original state;

[0077] It is usually set as follows: the cam portion 2122 rotates from the position on the outer circumference of the cam portion 2122 with the smallest distance from its rotation axis to abut against the first elastic member 23 to the position on the outer circumference of the cam portion 2122 with the largest distance from its rotation axis to abut against the first elastic member 23, and the cam portion 2122 completes a locking positioning, wherein the travel distance of the top screw 223 during a locking positioning process can be determined by adjusting the depth of the top screw 223 screwed into the guide sleeve 222.

[0078] Alternatively, if Figure 1 and Figure 4 As shown, in the locking mechanism of the positioning element provided in the embodiment of the present application, a plane 21221 is formed on the outer circumferential surface of the two cam portions 2122 at the position with the largest distance from the rotation axis thereof.

[0079] The plane 21221 is parallel to the section located at the position on the outer circumference of the cam portion 2122 at the largest distance from its rotation axis. The plane 21221 is arranged so that when the cam portion 2122 rotates to the position on its outer circumference at the largest distance from its rotation axis and abuts against the end plate 2221 of the first elastic member 23 or the washer 24 or the guide sleeve 222, the position of the cam portion 2122 is maintained to prevent the cam portion 2122 from rotating due to unnecessary external force or the like, thereby preventing the locking effect of the positioning element 3 from being guaranteed.

[0080] In the locking mechanism of the positioning element provided in the embodiment of the present application, the mounting shaft 211 can be disposed inside the first mounting portion 11, and the two ends of the mounting shaft 211 are rotatably connected to the opposite side walls of the first mounting portion 11 respectively;

[0081] Or, if Figure 1 and Figure 3 As shown, the first end of the first mounting portion 11 extends in a direction away from the second end thereof to form two oppositely disposed connecting ears 114, and the two ends of the mounting shaft 211 are rotatably connected to the two connecting ears 114 respectively. By providing the connecting ears 114, the installation of the mounting shaft 211 can be more convenient.

[0082] like Figure 1 As shown, the locking mechanism of the positioning element provided in the embodiment of the present application, the body 1 also includes a second mounting portion 12, and the first mounting portion 11 is directly connected to the second mounting portion 12 or connected through a connecting arm 13. The second mounting portion 12 is used to realize the installation of the locking mechanism of the positioning element and other structures, and the length of the connecting arm 13, the connection angle and position between the connecting arm 13 and the first mounting portion 11, and the connection angle and position between the connecting wall and the second mounting portion 12 can be flexibly adjusted according to actual needs, and the present application is not limited thereto.

[0083] Based on the locking mechanism of the positioning element provided in the above embodiment, the present application also provides a positioning element accordingly, wherein the positioning element is used to provide positioning information; and the positioning element is locked and positioned in the locking mechanism of the positioning element provided in the above embodiment.

[0084] Based on the locking mechanism and positioning element of the positioning element provided in the above-mentioned embodiments, accordingly, an embodiment of the present application provides a surgical instrument, which includes: a tracing part and a functional part, the tracing part includes a plurality of positioning elements provided in the above-mentioned embodiments; the functional part and the tracing part have a predetermined positional relationship, which is used to cooperate with anatomical structures or other surgical instruments during surgery.

[0085] Based on the locking mechanism of the positioning element, the positioning element and the surgical instrument provided in the above-mentioned embodiments, accordingly, the embodiments of the present application provide a surgical system, the surgical system comprising: an execution part and a positioning part, the execution part is used to engage the surgical tool, the positioning part is used to be set on the execution part or the surgical tool to indicate the orientation, and the positioning part comprises a plurality of positioning elements as provided in the above-mentioned embodiments.

[0086] In the locking mechanism, positioning element, surgical instrument and surgical system of the positioning element of the embodiment of the present application, the locking mechanism of the positioning element can accommodate the positioning element by providing a receiving portion on the main body, and by providing a locking component having a locking switch, a sliding assembly and a first elastic member on the main body. When the positioning element needs to be positioned, the locking switch is operated to drive the sliding assembly to move, and the second end of the sliding assembly moves toward the direction close to the receiving portion until it contacts the positioning element and presses it against the receiving portion, thereby achieving the locking positioning of the positioning element. The locking force applied by the sliding assembly to the positioning element can be automatically and elastically adjusted through the first elastic member, thereby adjusting the locking degree of the positioning element, making it difficult for the positioning element to be displaced, thereby promoting effective locking of the positioning element. At the same time, in the locking mechanism, positioning element, surgical instrument and surgical system of the positioning element of the embodiment of the present application, the structure of the locking mechanism of the positioning element is very simple, which is convenient for disassembly and installation of the positioning element.

[0087] In the locking mechanism of the positioning element, the positioning element, the surgical instrument and the surgical system of the embodiment of the present application, the locking mechanism of the positioning element uses a disc spring and a corrugated spring to work together. First, the disc spring can increase the moving stroke of the top screw during the locking process to avoid the situation where the components are in rigid contact during the locking process without the disc spring, which may cause the cam handle to be unable to move before reaching the target position; in addition, the working stroke of the disc spring is adjusted by adjusting the screw-in depth of the top screw and the guide sleeve to obtain the desired locking force without requiring high processing accuracy. The locking force is applied by the disc spring, and error compensation and wear compensation can be achieved by adjusting the top screw and the guide sleeve after wear or processing errors.

[0088] In the locking mechanism of the positioning element, the positioning element, the surgical instrument and the surgical system of the embodiments of the present application, most of the components of the locking component of the locking mechanism of the positioning element are installed inside the first mounting part of the main body, and the disc spring and the corrugated spring occupy less space than ordinary springs, and have the advantage of simple and compact structure.

[0089] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A locking mechanism for a positioning element, characterized in that: The locking mechanism of the positioning element comprises: a body, wherein a receiving portion is provided on the body, and the receiving portion is used to receive at least a part of the positioning element; and A locking member, the locking member comprising: A locking switch connected to the body; a sliding assembly configured to be movable in an axial direction; and A first elastic member, wherein the first elastic member is disposed between the sliding assembly and the locking switch; The locking switch is configured to have a switchable locking state and an active state. In the locking state, the locking switch pushes the first elastic member to move the second end of the sliding assembly to the accommodation portion to abut against the positioning element. In the active state, the sliding assembly can be withdrawn from the accommodation portion. The sliding assembly comprises a guide sleeve and a top screw, wherein the guide sleeve is threadedly connected to the top screw and the connection length is adjustable; The sliding assembly further comprises a guide shaft, a first end of the guide shaft is connected to the locking switch, a second end of the guide shaft faces the direction where the accommodation portion is located, and the first elastic member is sleeved on the guide shaft; The guide sleeve is slidably mounted on the guide shaft, and a first end of the guide sleeve abuts against a portion of the locking switch; and The top screw is detachably connected to the second end of the guide sleeve, and the top screw corresponds to the accommodating portion.

2. The locking mechanism of the positioning element according to claim 1, characterized in that: When the locking switch switches between the active state and the locking state, the first elastic member is deformed to apply a locking force to the sliding assembly to fix the positioning element.

3. The locking mechanism of the positioning element according to claim 1, characterized in that: The first elastic member is a disc spring, and a washer is provided between the disc spring and the locking switch.

4. The locking mechanism of the positioning element according to claim 1, characterized in that: The guide sleeve is in a cylindrical structure, the first end of the guide sleeve has an end plate, and the end plate is provided with a mounting hole for the guide shaft to pass through, the second end of the guide sleeve is open, and the top screw is connected to the second end of the guide sleeve.

5. The locking mechanism of the positioning element according to claim 4, characterized in that: The second end of the guide shaft is provided with a first boss along its radial direction, and the diameter of the first boss is larger than the hole diameter of the mounting hole.

6. The locking mechanism of the positioning element according to claim 5, characterized in that: The locking member further includes a second elastic member, the second elastic member is sleeved on the guide shaft, and the second elastic member is located between the end plate and the first boss.

7. The locking mechanism of the positioning element according to claim 6, characterized in that: The second elastic member is a corrugated spring.

8. The locking mechanism of the positioning element according to claim 1, characterized in that: The locking switch comprises a mounting shaft and a cam handle, wherein the mounting shaft is rotatably connected to the cam handle.

9. The locking mechanism of the positioning element according to claim 8, characterized in that: The cam handle comprises a cam portion, and a plane is formed on the outer peripheral surface of the cam portion at a position where the distance from the cam portion to the rotation axis is the largest.

10. A surgical instrument, characterized in that: The surgical instrument comprises: A tracing part, the tracing part comprising a positioning element and a locking mechanism of the positioning element according to any one of claims 1 to 9, the positioning element is used to provide positioning information, and the positioning element is locked and positioned in the locking mechanism of the positioning element; A functional part has a predetermined positional relationship with the tracing part, and the functional part is used to cooperate with the anatomical structure during surgery.

11. A surgical system, characterized in that: The surgical system comprises: An execution part and a positioning part, wherein the execution part is used to engage a surgical tool, and the positioning part is used to be set on the execution part or the surgical tool to indicate a position, and the positioning part includes a plurality of the positioning elements and a locking mechanism of the positioning element as described in any one of claims 1 to 9, and the positioning element is used to provide positioning information, and the positioning element is locked and positioned in the locking mechanism of the positioning element.

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