Surgical instrument

Abstract

The utility model provides a surgical instrument which comprises a rod assembly, a connecting component and a locking mechanism, and the connecting component is connected with the rod assembly and can rotate around a rotating axis relative to the rod assembly. The locking mechanism comprises a locking piece and a buckle structure, the buckle structure comprises a plurality of buckle protrusions and a plurality of buckle grooves, each buckle protrusion can be matched with any buckle groove in a buckled mode, the buckle protrusions are arranged on the connecting component or the locking piece, the buckle grooves are formed in the locking piece or the connecting component, and the buckle protrusions are matched with the buckle grooves in a buckled mode. The buckle protrusions can be separated from the buckle grooves, or at least two buckle protrusions are matched with at least two buckle grooves in a buckled mode. The surgical instrument solves the problem that in the prior art, stability is low when the angle between the connecting component and the rod assembly is locked.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument manufacturing, and in particular to a surgical instrument. Background Technology

[0002] Anastomosing devices are frequently used in endoscopic surgery as an alternative to traditional open surgical instruments. The application of an anastomosis device often requires a smaller incision, which can shorten postoperative recovery time and reduce complications. Therefore, a series of anastomosing devices have been developed that allow for precise placement of the end effector through a cannula of a trocar at the desired surgical site. These end effectors can penetrate the body to capture and cut soft tissue.

[0003] Patent CN101327141B includes a shaft, an end effector, a connector, and a locking member. The connector includes a first connector member and a second connector member. One of the first and second connector members is mounted to the end effector, and the other is mounted to the shaft. The first connector member is movable about a rotation axis relative to the second connector member. The first connector member includes: a first portion having a first outer periphery extending between the rotation axis and the first outer periphery; and a second portion having a second outer periphery extending between the rotation axis and the second outer periphery. Teeth and grooves defined between the teeth are formed between the first and second portions.

[0004] The locking member may include an end portion and a shaft portion, wherein the end portion may include a groove that can be configured to accommodate the teeth of the locking member in a tight fit or even an interference fit relationship.

[0005] The end effector can swing at a certain angle, and after swinging at a certain angle, it can be locked by a locking member to prevent it from swinging. Specifically, when the end effector needs to swing at a certain angle, first pull the knob towards the proximal end, which moves the shaft part towards the proximal end, thereby separating the groove from the tooth. Then, by rotating the knob mechanism, the centering shafts on both sides move. The centering shafts press against the centering surface, thereby causing the first joint member to pivot, and then the end effector swings to the required position. When the end effector swings to the required position, release the knob, and the shaft part moves towards the distal end under the action of the spring, thereby re-engaging the groove and the tooth to achieve locking.

[0006] However, in this patent, the teeth are formed on the joint member, and the end portion of the locking member only engages with one tooth of the gear, resulting in low locking stability. Utility Model Content

[0007] The purpose of this invention is to provide a surgical instrument to solve the problem of poor locking stability in existing surgical instruments.

[0008] To achieve the above-mentioned objectives of this utility model, one embodiment of this utility model provides a surgical instrument, comprising:

[0009] Rod assembly;

[0010] A connecting member, connected to the rod assembly and rotatable relative to the rod assembly about a rotation axis;

[0011] The locking mechanism includes a locking element and a latching structure. The latching structure includes multiple latching protrusions and multiple latching slots. Each latching protrusion can engage with any one of the latching slots. The latching protrusions are disposed on the connecting member or the locking element, and the latching slots are disposed on the locking element or the connecting member. When the connecting member forms an angle with the rod assembly, the latching protrusions can separate from the latching slots, or at least two latching protrusions can engage with at least two latching slots.

[0012] As a further improvement of this utility model embodiment, the locking mechanism further includes a first elastic member, which is disposed on the locking member and is at least used to abut the locking member against the connecting member so that at least two of the buckle protrusions engage with at least two of the buckle slots.

[0013] As a further improvement of this utility model embodiment, the surgical instrument further includes a transmission component, which is driven to cooperate with the locking component to make the locking component move away from the connecting member against the elastic force of the first elastic component, and to separate the buckle protrusion from the buckle groove.

[0014] As a further improvement of this utility model embodiment, the locking member includes an abutting inclined surface, and the transmission member can apply pressure to the abutting inclined surface to make the locking member move relative to the transmission member in a direction away from the connecting member, and to separate the buckle protrusion from the buckle groove.

[0015] As a further improvement of this utility model embodiment, the locking mechanism further includes a second elastic member, which is disposed on the transmission member and can use its elastic force to keep the transmission member in an initial position where no pressure is applied to the abutting inclined surface. When the transmission member is in the initial position, at least two of the buckle protrusions engage with at least two corresponding buckle slots.

[0016] As a further improvement of this utility model embodiment, the locking mechanism further includes a driving unit, which is driven in conjunction with the transmission member to enable the transmission member to overcome the elastic force of the second elastic member and apply pressure to the abutting inclined surface, and to make the locking member move relative to the transmission member in a direction away from the connecting member.

[0017] As a further improvement of this utility model embodiment, the connecting member has a mounting surface intersecting the rotation axis, the buckle protrusion or the buckle groove is disposed on the mounting surface, the locking member has a locking surface facing the mounting surface, and the buckle groove or the buckle protrusion is disposed on the locking surface.

[0018] As a further improvement of this utility model embodiment, the rod assembly includes a mounting bracket, the connecting member is disposed on the mounting bracket and is pivotable relative to the mounting bracket, the mounting surface is disposed facing the mounting bracket, the locking member is disposed between the mounting bracket and the mounting surface, and the first elastic member is disposed on the side of the locking member opposite to the locking surface.

[0019] As a further improvement of this utility model embodiment, at least one guide post is provided on the side of the locking member facing away from the locking surface, and a guide hole is provided on the mounting bracket corresponding to each of the at least one guide post, with the guide post passing through the guide hole.

[0020] As a further improvement to the present invention, the buckle protrusion is configured as a cylindrical protrusion or a toothed protrusion, and the buckle groove is configured as a cylindrical groove that cooperates with the cylindrical protrusion or as a toothed groove that cooperates with the toothed protrusion.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] When at least two of the said latching protrusions engage with at least two of the said latching slots, a stable latching effect can be achieved, solving the problem in the prior art where the end portion of the locking component only engages with one tooth of the gear, resulting in low locking stability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a surgical instrument provided in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the exploded structure;

[0025] Figure 3 for Figure 2 A partial structural diagram;

[0026] Figure 4 for Figure 3 Enlarged view of point M in the middle;

[0027] Figure 5 for Figure 1 A partial cross-sectional schematic diagram;

[0028] Figure 6 for Figure 5 Enlarged view of point N;

[0029] Figure 7 for Figure 2 Structural diagram of the connecting component;

[0030] Figure 8 for Figure 2 Schematic diagram of the central locking component;

[0031] Figure 9 for Figure 2 Schematic diagram of the transmission component;

[0032] Figure 10 A partial structural schematic diagram of a surgical instrument provided for another embodiment of the present invention;

[0033] Figure 11 for Figure 10 A schematic diagram of the exploded structure;

[0034] Figure 12 for Figure 11 A magnified view of point X in the middle.

[0035] The above description of the figures includes the following reference numerals:

[0036] 1. Rod assembly;

[0037] 11. Install the bracket;

[0038] 111. Install the uprights;

[0039] 113. Guide hole;

[0040] 114. Receiving hole;

[0041] 2. End effector;

[0042] 21. Anchor seat;

[0043] 22. Storage compartment unit;

[0044] 221. Warehouse base;

[0045] 222. Pinned storage;

[0046] 3. Connecting components;

[0047] 31. Mounting surface;

[0048] 32. Calm and composed;

[0049] 33. Mounting holes;

[0050] 41. Locking components;

[0051] 411. Contact with inclined plane;

[0052] 4111, First side;

[0053] 4112, Second side;

[0054] 412. Locking surface;

[0055] 413. Guide column;

[0056] 414. Clearance groove;

[0057] 415. Leave the end face;

[0058] 416. Fixed column;

[0059] 421, 423, buckle protrusions;

[0060] 422, 424, buckle slots;

[0061] 43. First elastic element;

[0062] 44. Transmission components;

[0063] 441. Shaft section;

[0064] 442. End portion;

[0065] 4421. Abutting protrusion;

[0066] 45. Second elastic element;

[0067] 5. Threshold pin;

[0068] 51. Damping components. Detailed Implementation

[0069] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0070] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0071] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0072] To address the problem of poor locking stability in existing surgical instruments, this invention provides a surgical instrument.

[0073] The present invention will now be described in further detail with reference to the accompanying drawings.

[0074] like Figure 1-9 As shown, a surgical instrument provided in one embodiment of the present invention includes a rod assembly 1, a connecting member 3, and a locking mechanism.

[0075] The connecting member 3 is connected to the rod assembly 1 and can rotate relative to the rod assembly 1 about a rotation axis.

[0076] The locking mechanism includes a locking member 41 and a latching structure. The latching structure includes multiple latching protrusions 421 and multiple latching grooves 422. Each latching protrusion 421 can latch with any one of the latching grooves 422. The latching protrusions 421 are disposed on the connecting member 3 or the locking member 41, and the latching grooves 422 are disposed on the locking member 41 or the connecting member 3. The latching protrusions 421 can be separated from the latching grooves 422, or at least two latching protrusions 421 can latch with at least two latching grooves 422.

[0077] In this utility model, the buckle protrusion 421 can be selectively disposed on the locking member 41 or the connecting member 3, and correspondingly, the buckle groove 422 can be selectively disposed on the connecting member 3 or the locking member 41. This utility model does not limit the placement of the locking member 41 on the connecting member 3 or the locking member 41; any scheme using the same or similar methods as this embodiment is covered within the protection scope of this utility model.

[0078] It should be noted that when the latching protrusion 421 is separated from the latching groove 422, the included angle between the connecting member 3 and the rod assembly 1 can be adjusted. When at least two of the latching protrusions 421 are engaged with at least two of the latching grooves 422, the connecting member 3 can be fixed relative to the rod assembly 1, thereby keeping the included angle between the connecting member 3 and the rod assembly 1 unchanged.

[0079] It should be further explained that the reference Figure 1-3As shown, the surgical instrument in this invention typically also includes an end effector 2, which is connected to the rod assembly 1 via a connecting member 3 and is movable relative to the rod assembly 1. The connecting member 3 is rotatable relative to the rod assembly 1 about the rotation axis. Typically, the end effector 2 and the connecting member 3 are connected by a pin.

[0080] Preferably, the axial direction of the pin is orthogonal to the axis of rotation.

[0081] refer to Figure 2-3 As shown, the end effector 2 of this invention may include an anvil 21 and a cartridge unit 22. The cartridge unit 22 specifically includes a staple cartridge 222 and a cartridge base 221, wherein the staple cartridge 222 is detachably mounted on the cartridge base 221. The staple cartridge 222 has a staple cartridge channel, wherein the staple cartridge 222 can be configured to detachably store staples. At least one of the cartridge base 221 and the anvil 21 can pivot about the pin relative to the other to realize the opening and closing of the end effector 2.

[0082] In at least one embodiment, the staple cartridge 222 is located between the anvil 21 and the cartridge base 221. The anvil 21 is pivotally connected to the staple cartridge channel and can pivot between an open and closed position via the end effector 2 closure system. To deploy the staples from the staple cartridge 222, the surgical instrument may further include a staple actuator and a firing actuator, the staple actuator being configured to traverse the staple cartridge 222, and the firing actuator being configured to advance the staple actuator within the staple cartridge 222. In various embodiments, the anvil 21 may be configured to deform at least a portion of the staple during deployment from the staple cartridge 222.

[0083] Understandably, the movement of the end effector 2 relative to the rod assembly 1 is specifically manifested in the opening or closing of the end effector 2 itself, and the rotation of the end effector 2 relative to the rod assembly 1 by a certain angle driven by the connecting member 3.

[0084] Furthermore, when at least two of the said latching protrusions 421 engage with at least two of the said latching slots 422, the connecting member 3 can be fixed relative to the rod assembly 1, that is, the angle between the connecting member 3 and the rod assembly 1 remains unchanged, thereby keeping the angle between the end actuator 2 and the rod assembly 1 unchanged. With this configuration, the end actuator 2 can clamp and operate on the tissue to be cut at a fixed angle.

[0085] With the above configuration, a stable locking effect can be achieved when at least two of the latching protrusions 421 engage with at least two of the latching slots 422, solving the problem in the prior art where the end part of the locking component only engages with one tooth of the gear, resulting in low locking stability.

[0086] It should be emphasized that in this utility model, "distal" and "proximal" are relative to the operator. The end closer to the operator is the proximal end, and the end farther from the operator, that is, the end closer to the surgical site, is the distal end. Figure 1 In the diagram, the left side is the proximal end, and the right side is the distal end. Axial direction typically refers to the axial direction of rod assembly 1.

[0087] Further, refer to Figure 5-6 The locking mechanism further includes a first elastic element 43, which is disposed on the locking member 41. Its function is to at least abut the locking member 41 against the connecting member 3. This arrangement ensures a stable latching engagement between at least two latching protrusions 421 and at least two latching slots 422, thereby enhancing the stability and reliability of the locking mechanism. Even after the rod assembly 1 undergoes articulation relative to the connecting member 3, the included angle between the rod assembly 1 and the connecting member 3 remains unchanged.

[0088] Optionally, one end of the first elastic member 43 can be connected to the locking member 41, and the other end can be engaged with the rod assembly 1 in an appropriate manner. For example, it can be connected to the connecting part on the rod assembly 1; or, a receiving groove can be provided on the rod assembly 1, and the other end of the first elastic member 43 can be placed in the receiving groove, and the groove wall of the receiving groove can compress the first elastic member 43, thereby ensuring that the elastic force generated by the first elastic member 43 can abut the locking member 41 against the connecting member 3.

[0089] This utility model does not limit the way the first elastic element 43 and the rod assembly 1 cooperate. Users can set it according to the actual situation. All technical solutions that are the same as or similar to this embodiment should be included in the scope of protection of this utility model.

[0090] Further, refer to Figure 5 As shown, the surgical instrument is also equipped with a transmission component 44, which forms a transmission engagement with the locking component 41. When unlocking is required, the transmission component 44 applies force to the locking component 41, enabling it to overcome the elastic force generated by the first elastic component 43 and move away from the connecting member 3. This movement causes the originally latching protrusion 421 to separate from the latching groove 422, thereby allowing the connecting member 3 to rotate or adjust its angle relative to the rod assembly 1. This design ensures the flexibility and convenience of the surgical instrument during use, while maintaining the stability and reliability of the structure.

[0091] Specifically, refer to Figure 6As shown, the locking member 41 includes an abutting ramp 411, which interacts with the transmission member 44. When unlocking is required, the transmission member 44 applies pressure to the abutting ramp 411. Under this pressure, the locking member 41 moves relative to the transmission member 44 in a direction away from the connecting member 3. This movement causes the latching protrusion 421, which was originally tightly engaged, to separate from the latching groove 422, thereby allowing the connecting member 3 to rotate freely relative to the rod assembly 1 or adjust its included angle. This design fully utilizes the ramp feature of the abutting ramp 411, ensuring not only stability during locking but also giving the surgical instrument flexibility and ease of operation during unlocking.

[0092] Turning Figure 5 As shown, the locking mechanism also includes a second elastic element 45, which is cleverly mounted on the transmission element 44. The second elastic element 45, by virtue of its elasticity, ensures that the transmission element 44 remains stably in its initial position without applying any pressure to the abutment slope 411. When the transmission element 44 is in this initial position, it does not exert any unlocking force on the locking element 41, thereby ensuring a stable latching engagement between at least two latching protrusions 421 and the corresponding at least two latching slots 422.

[0093] Understandably, the snap-fit ​​engagement state is achieved by the first elastic member 43 abutting the locking member 41 against the connecting member 3.

[0094] The above design not only enhances the stability and reliability of the locking mechanism, but also makes surgical instruments easier and more convenient to operate.

[0095] refer to Figure 3 and Figure 9 As shown, preferably, the transmission member 44 includes an interconnected shaft portion 441 and an end portion 442. The shaft portion 441 is parallel to the axial direction of the rod assembly 1, ensuring the stability of the transmission member 44 during movement. The end portion 442 is located at the distal end of the shaft portion 441, a design that allows the transmission member to act more precisely on the inclined surface 422. One end of the second elastic member 45 is connected to the end portion 442, and the other end can abut against or connect to the rod assembly 1, thereby generating an elastic force. This elastic force can be used to push the transmission member 44 to the initial position.

[0096] Furthermore, the locking mechanism also includes a drive unit that engages with the transmission member 44. When unlocking is required, the drive unit is activated and transmits force to the transmission member 44, enabling it to overcome the elastic force generated by the second elastic member 45 and move relative to the transmission member 44 in a direction away from the connecting member 3 to achieve unlocking.

[0097] Under the action of the drive unit, the transmission member 44 applies pressure to the abutting inclined surface 411, thereby pushing the locking member 41 to move relative to the transmission member 44 in a direction away from the connecting member 3. This design ensures that the locking mechanism can respond quickly and accurately when unlocking, while maintaining the stability and reliability of the overall structure, making the operation of surgical instruments smoother and more efficient.

[0098] Further, refer to Figure 2 and Figure 7 As shown, the connecting member 3 has a mounting surface 31 intersecting the axis of rotation. This design ensures that the connecting member 3 remains stable during rotation or oscillation. The mounting surface 31 is provided with either the latching protrusion 421 or the latching groove 422. In this embodiment, the mounting surface 31 is provided with the latching groove 422, which cooperates with the corresponding structure on the locking member 41 to realize the function of the locking mechanism.

[0099] The locking member 41 has a locking surface 412 facing the mounting surface, on which a latching groove 422 or a latching protrusion 421 is provided that matches a latching protrusion 421 or a latching groove 422 on the mounting surface 31. (Reference) Figure 8 As shown, in this embodiment, the locking surface 412 is provided with a latching protrusion 421 that cooperates with the latching groove 422. When the locking member 41 and the connecting member 3 are locked together, the latching protrusion 421 and the latching groove 422 are tightly engaged, ensuring the stability and reliability of the locking mechanism. This design conforms to the common design principles of minimally invasive surgical instruments.

[0100] Further, refer to Figure 3 and Figure 4 As shown, the rod assembly 1 mainly includes a mounting bracket 11, which provides a stable mounting base for the connecting member 3.

[0101] The connecting member 3 engages with the mounting column 111 of the mounting bracket 11 via its mounting hole 33. The mounting column 111 is typically positioned perpendicular to the axial direction of the rod assembly. This enables the connecting member 3 to pivot relative to the mounting bracket 11. The central axis of the mounting column 111 is carefully positioned as the axis of rotation, ensuring the stability and accuracy of the connecting member 3 during rotation.

[0102] The mounting surface 31 of the connecting member 3 faces the mounting bracket 11, a design that facilitates the installation of other functional components or allows for close contact with other components. The locking element 41 is cleverly positioned between the mounting bracket 11 and the mounting surface 31 to precisely control the locking and unlocking states of the connecting member 3. The first elastic element 43 is located on the side of the locking element 41 facing away from the locking surface 412, providing necessary elastic support to ensure that the locking element 41 abuts against the connecting member, thereby achieving the engagement of the latching protrusion 421 with the latching groove 422, and quickly returning to the engaged state after unlocking. This structural design not only meets the precision requirements of minimally invasive surgical instruments but also ensures the stability and reliability of the locking mechanism.

[0103] Specifically, refer to Figure 5 and Figure 6 As shown, a fixing post 416 is provided on the side of the locking member 41 facing away from the locking surface 412. The first elastic member 43 is sleeved on the fixing post 416, and one end of the first elastic member 43 is connected to the locking member 41. The mounting bracket 11 is provided with a receiving hole 114, which is used to accommodate the fixing post 416 and the first elastic member 43. The other end of the first elastic member 43 is connected to the inner wall of the receiving hole 114. This arrangement ensures that the first elastic member 43 stably applies force to the locking member 41.

[0104] Then return Figure 8 ,exist Figure 8 The left side is the proximal end, and the right side is the distal end. It should be noted that a relief groove 414 is provided on the locking member 41. The relief groove opens towards the distal end, and the bottom wall of the relief groove 414 is configured as the abutment slope 411. The abutment slope 411 has a first side 4111 close to the locking surface 412 and a second side 4112 away from the locking surface 412.

[0105] Furthermore, the abutting slope 411 extends from the first side 4111 to the second side 4112 in a direction from the proximal end to the distal end.

[0106] In this embodiment, the first side 4111 is also connected to a retention end face 415 parallel to the locking surface 412, which extends from the first side 4111 toward the proximal end. The locking member 41 includes a locking surface 412 and another side disposed opposite to the locking surface 412, and the retention end face 415 is located between the locking surface 412 and the other side.

[0107] During operation, the transmission member 44 can be moved toward the proximal end to abut against the inclined surface 411, thereby causing the locking member 41 to move relative to the transmission member 44 in a direction away from the connecting member 3. Then, the transmission member 44 stops on the retention end face 415 in a relatively stable state, which is the unlocked state. In this state, the locking member 41 is separated from the connecting member 3, and the buckle protrusion 421 is separated from the buckle groove 422.

[0108] Further, refer to Figure 6 and Figure 9 As shown, in this embodiment, the transmission member 44 abuts against the abutting inclined surface 411 via its end portion 442. The end portion 442 has an abutting protrusion 4421 protruding toward the locking member 41. The proximal end of the abutting protrusion 4421 has a force-applying plane that cooperates with the abutting inclined surface 411. When the transmission member 44 is driven to move toward the proximal end, the force-applying plane can abut against the abutting inclined surface 411, thereby enabling the locking member 41 to move smoothly relative to the transmission member 44.

[0109] In this embodiment, optionally, at least one guide post 413 is provided on the side of the locking member 41 facing away from the locking surface. (See reference) Figure 4 These guide posts 413 cooperate with the guide holes 113 on the mounting bracket 11 to ensure the stability and directionality of the locking element 41 during movement.

[0110] Specifically, each guide post 413 is inserted into a corresponding guide hole 113. This fit not only simplifies the structure of the locking mechanism but also improves the stability and precision of the locking element. Through the tight fit between the guide post and the guide hole, the locking element 41 can move along a predetermined trajectory during operation, and is not easily affected by external forces, thereby ensuring the safety and effectiveness of the surgical procedure.

[0111] In this embodiment, reference Figure 8 As shown, the buckle protrusion 421 is designed as a cylindrical protrusion, and the corresponding buckle groove is a cylindrical groove (e.g., Figure 7 (As shown). This design is simple and practical, providing a stable locking effect while also being relatively easy to unlock. The tight fit between the cylindrical protrusion and the slot ensures the stability and reliability of the locking mechanism.

[0112] In other embodiments, for example, Figure 10-12 A partial structural schematic diagram of a surgical instrument according to another embodiment is shown, for details please refer to... Figure 12As shown, the latch protrusion 423 features a toothed design, while the latch groove 424 is a corresponding toothed groove. This toothed structure design improves locking strength and precision, potentially making it suitable for applications requiring finer angle adjustments. However, the interaction between the toothed protrusion and the groove may also lead to a relatively complex unlocking operation. Both designs have their advantages, and the specific choice depends on the actual application requirements.

[0113] Further, refer to Figure 5 As shown, the surgical instrument is further provided with two opposing ejector pins 5, which are arranged in a direction parallel to the axis of the rod assembly 1. These two ejector pins 5 can respectively abut against the connecting member 3, thereby stably maintaining the angle formed by the connecting member 3 relative to the rod assembly 1.

[0114] Furthermore, Figure 5-6 The locking member 41 is shown to be abutted against the connecting member 3 by the elastic force of the first elastic member 43, thereby causing at least two snap-fit ​​protrusions 421 to engage with at least two snap-fit ​​slots 422, thus placing it in a locked state. The presence of the ejector pin 5 further ensures the stability and angular accuracy of the entire structure, improving the reliability and safety of the surgical instrument during use.

[0115] Furthermore, a damping element 51 is fitted onto each ejector pin 5. This damping element 51 can provide a stable damping force to the ejector pin 5 in the axial direction, ensuring that the ejector pin 5 can tightly abut against the connecting member 3, thereby playing a damping role in the process of adjusting the angle and enhancing the stability of the surgical instrument.

[0116] Specifically, the damping element 51 is connected between the ejector pin 5 and the rod assembly 1, and can provide damping force to the ejector pin 5 in the axial direction. The connecting member 3 has a centering surface 32 facing the ejector pin 5, and the damping force can ensure that the ejector pin 5 can tightly abut against the centering surface 32.

[0117] In summary, the embodiments of this utility model achieve the following technical effects:

[0118] When at least two of the said latching protrusions 421 engage with at least two of the said latching slots 422, a stable latching effect can be achieved, solving the problem in the prior art where the end part of the locking component only engages with one tooth of the gear, resulting in low locking stability.

[0119] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0120] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0121] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0122] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A surgical instrument, characterized by, The surgical instrument comprises: a rod assembly; a connecting member connected to the rod assembly and rotatable relative to the rod assembly about a rotation axis; and a locking mechanism, the locking mechanism comprising a locking piece, a buckle structure, the buckle structure comprising a plurality of buckle protrusions and a plurality of buckle slots, each of the buckle protrusions being capable of being buckled with any one of the buckle slots, the buckle protrusions being arranged on the connecting member or the locking piece, the buckle slots being arranged on the locking piece or the connecting member, the buckle protrusions being separable from the buckle slots or at least two of the buckle protrusions being buckled with at least two of the buckle slots.

2. The surgical instrument of claim 1, wherein, The locking mechanism further comprises a first elastic member arranged on the locking piece and used at least for abutting the locking piece against the connecting member to enable the at least two buckle protrusions to be buckled with the at least two buckle slots.

3. The surgical instrument of claim 2, wherein, The surgical instrument further comprises a transmission member in transmission cooperation with the locking piece to enable the locking piece to move away from the connecting member against the elastic force of the first elastic member and to separate the buckle protrusions from the buckle slots.

4. The surgical instrument of claim 3, wherein, The locking piece comprises an abutting inclined surface, and the transmission member is capable of applying pressure to the abutting inclined surface to enable the locking piece to move relative to the transmission member in a direction away from the connecting member and to separate the buckle protrusions from the buckle slots.

5. The surgical instrument of claim 4, wherein, The locking mechanism further comprises a second elastic member arranged on the transmission member and capable of enabling the transmission member to be in an initial position in which no pressure is applied to the abutting inclined surface by the transmission member, and when the transmission member is in the initial position, the at least two buckle protrusions are buckled with the at least two buckle slots.

6. The surgical instrument of claim 5, wherein, The locking mechanism further comprises a driving unit in transmission cooperation with the transmission member to enable the transmission member to apply pressure to the abutting inclined surface against the elastic force of the second elastic member and to enable the locking piece to move relative to the transmission member in a direction away from the connecting member.

7. The surgical instrument of claim 2, wherein, The connecting member has a mounting surface intersecting the rotation axis, and the buckle protrusions or the buckle slots are arranged on the mounting surface; the locking piece has a locking surface arranged towards the mounting surface, and the buckle slots or the buckle protrusions are arranged on the locking surface.

8. The surgical instrument of claim 7, wherein, The rod assembly comprises a mounting bracket, the connecting member is arranged on the mounting bracket and is pivotable relative to the mounting bracket, the mounting surface is arranged towards the mounting bracket, the locking piece is arranged between the mounting bracket and the mounting surface, and the first elastic member is arranged on a side of the locking piece opposite to the locking surface.

9. The surgical instrument of claim 8, wherein, The side of the locking piece opposite to the locking surface is provided with at least one guide column, and the mounting bracket is provided with a guide hole corresponding to each of the at least one guide column, and the guide column is arranged in the guide hole.

10. The surgical instrument of claim 1, wherein, The buckle protrusions are arranged as cylindrical protrusions or tooth-shaped protrusions, and the buckle slots are arranged as cylindrical slots matched with the cylindrical protrusions or as tooth slots matched with the tooth-shaped protrusions.

Images