Surgical instrument

Abstract

The utility model provides a surgical instrument which comprises a jaw assembly, a sleeve assembly, a rod assembly and a triggering piece capable of rotating, and the jaw assembly is arranged on the rod assembly and can be opened or closed in a pivoted mode; the sleeve assembly is used for being arranged in a puncture outfit sleeve in a penetrating mode, and the sleeve assembly is in transmission fit with the jaw assembly. The rod assembly is arranged in the sleeve assembly in a penetrating mode and is in transmission fit with the triggering piece. When the trigger piece rotates, the rod assembly can be driven to move in the axial direction of the trigger piece so as to control the jaw assembly to be opened or closed. The utility model solves the problem that in the prior art, when the opening and closing of the jaw are controlled through the forward or backward movement of the outer sleeve, the outer sleeve and the puncture outfit sleeve move relatively, so that the accuracy and the safety of an operation are influenced.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a surgical instrument. Background Art

[0002] Surgical instruments, essential tools in modern minimally invasive surgery, are widely used in various procedures. Their primary function is to clamp and suture tissue using jaws, enabling quick and accurate surgical procedures. With the continuous advancement of medical technology, higher demands are being placed on surgical instruments for both performance and ease of use.

[0003] In current surgical practice, the outer sleeve is primarily controlled by a manual trigger to advance and retract the outer sleeve, thereby opening and closing the jaws. However, this method has exposed several practical issues, particularly the potential for relative motion between the outer sleeve and the trocar sleeve as the instrument passes through the trocar sleeve to clamp tissue within the body. This relative motion not only affects surgical precision but, more seriously, can cause the trocar sleeve to slip, introducing unnecessary risks to the procedure.

[0004] For example, a surgical instrument in the prior art, referring to Figure 1-3 As shown, the surgical instrument includes a jaw assembly, a sleeve assembly and a rod assembly, wherein the jaw assembly generally includes a magazine unit 11' and a pin holder 12', the sleeve assembly generally includes a sleeve body 21' and a slider 32', the sleeve body 21' is connected to the slider 32', and the rod assembly includes a rod body 31' and a bracket 22', one end of the rod body 31' is connected to the bracket 22', and the bracket 22' is used to fix the rod body 31', the magazine unit 11' and the pin holder 12' are arranged at the other end of the rod body 31', the magazine unit 11' and the pin holder 12' are pivotally connected and the two can move relative to each other.

[0005] A knife-pushing unit is usually provided in the rod body 31 ′, and the knife-pushing unit can be used to push the cutting knife and the nail-pushing slider in the jaw assembly to move.

[0006] The surgical instrument also includes a trigger member 4'. A mounting shaft 221' is fixedly provided on the bracket 22'. The mounting shaft 221' is arranged perpendicular to the axial direction of the sleeve body 21'. The trigger member 4' is sleeved on the mounting shaft 221' and can pivot relative to the mounting shaft 221'. The trigger member 4' is provided with a mounting hole 411' for mounting the mounting shaft 221'. The mounting hole 411' is arranged between the two ends of the trigger member 4'.

[0007] Furthermore, the trigger member 4' is connected to the slider 32' via a connecting rod 5'. The connecting rod 5' is typically connected to one end of the trigger member 4', and the mounting hole 411' is located between the connection between the trigger member 4' and the connecting rod 5' and the free end of the trigger member 4'. Rotating the trigger 4 drives the sleeve body 21' connected to the slider 32' to move back and forth along its axial direction to open or close the jaw assembly.

[0008] Optionally, when the slider 32' is assembled to the sleeve body 21', a groove is usually provided on the sleeve body 21' along its circumference, and the slider 32' can be connected to the sleeve body 21' by a connector inserted into the groove to prevent the two from moving relative to each other when the slider 32' drives the sleeve body 21' to move.

[0009] More specifically, see Figure 3 As shown, a through groove 212' is provided on the sleeve body 21' near the end where the jaw assembly is installed, and a transmission protrusion 2121' is provided on the inner wall of the through groove 212'. The transmission protrusion 2121' is directed toward the middle of the through groove 212' and extends radially toward the inner edge of the sleeve body 21'. Correspondingly, an abutment protrusion 121' is provided on the nail seat 12'.

[0010] refer to Figure 1-3 As shown, when the trigger 4 'self Figure 1 Rotate counterclockwise to Figure 2 During the process of moving to the middle position, the sleeve body 21' moves toward the jaw assembly, and the sleeve body 21' squeezes the nail plate 12' at one end close to the jaw assembly. At the same time, the transmission protrusion 2121' is separated from the abutment protrusion 121', thereby closing the jaw assembly.

[0011] refer to Figure 1-3 As shown, when the trigger 4 'self Figure 2 Turn clockwise to the middle position Figure 1 During the process of moving to the middle position, the sleeve body 21' moves toward the side where the trigger member 4' is located, the transmission protrusion 2121' can abut against the abutment protrusion 121', and the nail seat 12' pivots away from the magazine unit 11', thereby opening the jaw assembly.

[0012] Understandably, the cannula body 21' will move during the above process. When the cannula body 21' is inserted into the puncture cannula, friction can easily cause the cannula body 21' to move relative to the puncture cannula. This can affect surgical accuracy and even cause the puncture cannula to slip, thereby introducing unnecessary risks to the procedure.

[0013] Given this, the design of a novel surgical instrument structure is crucial. This new structure must ensure the outer sleeve remains stationary while the jaws open and close, effectively reducing interference during instrument operation. This not only improves surgical accuracy and safety, but also provides surgeons with a more stable and reliable surgical tool, further enhancing the quality and efficiency of minimally invasive surgery. Utility Model Content

[0014] The purpose of the utility model is to provide a surgical instrument to solve the problem in the prior art that when the jaws are opened and closed by moving the cannula body forward or backward, relative movement occurs between the cannula body and the trocar cannula, thereby affecting the accuracy and safety of the operation.

[0015] In order to achieve the above-mentioned purpose of the present invention, an embodiment of the present invention provides a surgical instrument, which includes:

[0016] a jaw assembly, the jaw assembly being disposed on the rod assembly and being pivotally opened or closed;

[0017] A cannula assembly is used to be inserted into the cannula of the trocar, and the cannula assembly is in driving cooperation with the jaw assembly;

[0018] A rod assembly, the rod assembly being inserted into the sleeve assembly and engaging with the trigger member in a transmission manner;

[0019] And a trigger member that can rotate, when the trigger member rotates, it can drive the rod assembly to move along its axial direction, so that the sleeve assembly and the jaw assembly are transmission-matched, thereby controlling the jaw assembly to open or close.

[0020] As a further improvement of the embodiment of the present invention, the sleeve assembly includes a sleeve body and a bracket for fixing the sleeve body, the bracket is sleeved on the side wall of the sleeve body and arranged near its first end, and the second end of the sleeve body can be transmission-matched with the jaw assembly.

[0021] As a further improvement to the embodiment of the present invention, a groove is provided on the side wall of the sleeve body near the first end thereof around its circumference, and the bracket is sleeved in the groove.

[0022] As a further improvement of the embodiment of the present invention, the rod assembly includes a rod body and a push block, the push block is connected to the first end of the rod body and is inserted into the bracket, and the jaw assembly is arranged on the second end of the rod body.

[0023] As a further improvement of the embodiment of the present utility model, the push block is connected to the trigger member through a connecting rod and is in transmission cooperation with the trigger member.

[0024] As a further improvement of an embodiment of the present invention, the jaw assembly includes a magazine unit and a nail seat, one end of the magazine unit and one end of the nail seat are respectively arranged on the rod assembly, and at least one of the magazine unit and the nail seat can be pivoted relative to the other to open or close.

[0025] As a further improvement of an embodiment of the present invention, the magazine unit includes a nail magazine and a magazine base, the nail magazine is detachably mounted on the magazine base through a connecting piece and is located between the magazine base and the nail support, and at least one of the magazine base and the nail support can be pivoted relative to the other to open or close.

[0026] As a further improvement of the embodiment of the present invention, the trigger member is provided with a mounting shaft for limiting its position, the mounting shaft is fixedly arranged perpendicular to the axial direction of the rod assembly, and the trigger member is sleeved on the mounting shaft and can pivot relative to the mounting shaft.

[0027] As a further improvement of the embodiment of the present invention, it also includes a locking structure, which includes a locking member and a releasing member connected to each other. When the trigger member drives the jaw assembly to close, the trigger member can cooperate with the locking member and be in a fixed locked state, and the releasing member can drive the locking member to break away from the locked state and separate from the trigger member.

[0028] As a further improvement of the embodiment of the present utility model, the trigger member includes a trigger and an arc-shaped cantilever arranged on the trigger, the trigger is sleeved on the mounting shaft and cooperates with the rod assembly in transmission, the trigger and the arc-shaped cantilever can pivot around the mounting shaft, a stop groove is provided on the arc-shaped cantilever, and the locking member includes a hook that cooperates with the stop groove, and in the locked state, the hook is engaged with the stop groove.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] By attaching the jaw assembly to the rod assembly, the trigger member rotates, driving the rod assembly along its axial direction, which in turn drives the jaw assembly. The jaw assembly, in turn, cooperates with the cannula assembly during movement to open or close the jaw assembly. During this process, the cannula assembly remains stationary, minimizing relative displacement with the trocar cannula, significantly improving surgical precision and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a jaw assembly of a surgical instrument in the prior art when it is open;

[0032] Figure 2 for Figure 1 A schematic structural diagram of a surgical instrument with a jaw assembly closed;

[0033] Figure 3 for Figure 2 Schematic diagram of the local structure in the exploded view of the surgical instrument;

[0034] Figure 4 A schematic structural diagram of a surgical instrument provided in one embodiment of the present utility model;

[0035] Figure 5 for Figure 4 A schematic diagram of a partial structure of a surgical instrument;

[0036] Figure 6 for Figure 5 Enlarged view of point N in the middle;

[0037] Figure 7 for Figure 4 Schematic diagram of the local structure in the exploded view of the surgical instrument;

[0038] Figure 8 for Figure 4 Schematic diagram of the movement principle and structure of surgical instruments;

[0039] Figure 9 for Figure 4 A schematic diagram of the structure of the surgical instrument jaw assembly when it is opened;

[0040] Figure 10 for Figure 4 A schematic diagram of the structure of the surgical instrument jaw assembly when it is closed;

[0041] Figure 11 for Figure 10 Enlarged view of point M in the middle.

[0042] The above description of the drawings includes the following reference numerals:

[0043] 11', magazine unit;

[0044] 12', anvil;

[0045] 121', abutment protrusion;

[0046] 21', casing body;

[0047] 211', groove;

[0048] 212', through slot;

[0049] 2121', transmission protrusion;

[0050] 22', bracket;

[0051] 221', installation shaft;

[0052] 31', rod body;

[0053] 32', slider;

[0054] 4', trigger;

[0055] 411', mounting hole;

[0056] 5', connecting rod;

[0057] 1. Jaw assembly;

[0058] 11. Warehouse unit;

[0059] 111. Nail warehouse;

[0060] 112. Warehouse base;

[0061] 12. Anvil;

[0062] 121, abutting protrusion;

[0063] 2. Casing assembly;

[0064] 21. Casing body;

[0065] 211, groove;

[0066] 212, through groove;

[0067] 2121, transmission protrusion;

[0068] 22. Bracket;

[0069] 221, install the shaft;

[0070] 3. Rod assembly;

[0071] 31. Rod body;

[0072] 32. Push block;

[0073] 321, ear seat;

[0074] 4. Trigger.

[0075] 41. Trigger;

[0076] 411. Mounting hole

[0077] 42. Arc cantilever;

[0078] 421, stop groove;

[0079] 43. Connecting rod;

[0080] 5. Connecting rod;

[0081] 6. Locking structure;

[0082] 61. Locking piece;

[0083] 611, hook;

[0084] 62. Release piece;

[0085] 621. Fixed axis. DETAILED DESCRIPTION

[0086] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0087] 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 ordinary technicians in the technical field to which this application belongs.

[0088] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0089] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0090] refer to Figure 4-11 As shown, the present invention provides a surgical instrument, which includes a jaw assembly 1, a sleeve assembly 2, a rod assembly 3 and a rotatable trigger member 4.

[0091] The jaw assembly 1 is provided on the rod assembly 3 and can be pivotally opened or closed; the cannula assembly 2 is used to be inserted into the cannula of the puncture device, and the cannula assembly 2 is in transmission cooperation with the jaw assembly 1; the rod assembly 3 is inserted into the cannula assembly 2 and is in transmission cooperation with the trigger member 4;

[0092] When the trigger member 4 rotates, it can drive the rod assembly 3 to move along its axial direction, so that the sleeve assembly 2 and the jaw assembly 1 are in transmission cooperation, thereby controlling the jaw assembly 1 to open or close.

[0093] With this arrangement, the jaw assembly 1 is mounted on the rod assembly 3. Rotation of the trigger member 4 drives the rod assembly 3 along its axial direction, thereby driving the movement of the jaw assembly 1. During this movement, the jaw assembly 1 engages with the cannula assembly 2 to open or close the jaw assembly 1. During this process, the cannula assembly 2 remains stationary, minimizing relative displacement with the trocar cannula, thereby significantly improving surgical precision and safety.

[0094] In this embodiment, in order to achieve the reduction of the movement of the sleeve assembly 2 relative to the trocar sleeve. Figure 5 As shown, the cannula assembly 2 includes a cannula body 21 and a bracket 22. The bracket 22 is tightly fitted onto the sidewall of the cannula body 21, positioned near its first end, providing stable support for the cannula body 21. The surgical instrument includes an operating unit for mounting a trigger 4. During operation of the surgical instrument, the bracket 22 is typically fixed relative to the housing of the operating unit. This design ensures the stability of the cannula assembly 2 during surgical procedures, effectively reducing vibration and improving surgical precision.

[0095] Further, refer to Figure 5 and Figure 6 As shown, the second end of the sleeve body 21 is precisely matched with the jaw assembly 1 and can be transmission-matched with the jaw assembly 1.

[0096] In the present invention, when the trigger member 4 drives the rod assembly 3 to move, the jaw assembly 1 can be opened or closed smoothly, and during the whole process, the sleeve assembly 2 always remains fixed, thereby reducing the relative displacement with the puncture cannula and ensuring the smooth progress of the operation.

[0097] refer to Figure 7 As best shown, a groove 211 is meticulously designed around the circumference of the cannula body 21, near its first end. This groove provides a secure space for the bracket 22. The bracket 22 fits snugly within the groove 211, ensuring a stable connection between the cannula body 21 and the bracket 22. This design not only simplifies the assembly process but also improves precision and safety during surgical procedures.

[0098] Still refer to Figure 7 As shown in the figure, the rod assembly 3 mainly includes a rod body 31 and a push block 32. The rod body 31, as the main body of the rod assembly, plays a key role in bearing and transmitting force. The push block 32 is tightly connected to the first end of the rod body 31 and cleverly inserted into the bracket 22. This design allows the push block 32 to move stably and flexibly.

[0099] At the same time, the jaw assembly 1 is carefully arranged on the second end of the rod body 31, and the working state of the jaw assembly 1 is affected by the movement of the push block 32. Such an arrangement ensures the stability of the rod assembly and the accuracy of operation, and is an important component of surgical instruments.

[0100] Furthermore, the push block 32 is tightly connected to the trigger member 4 via the connecting rod 5, achieving transmission coordination. Generally speaking, the push block 32 is provided with an ear seat 321. One end of the connecting rod 5 is connected to the ear seat 321, and the other end is pivotally connected to the trigger member 4. The provision of the ear seat 321 further facilitates transmission coordination between the connecting rod 5 and the push rod 32.

[0101] When the trigger 4 is operated, its rotational motion is accurately transmitted to the push block 32 via the connecting rod 5, causing the push block 32 to drive the connected rod body 31 along its axial motion, thereby precisely controlling the opening and closing of the jaw assembly 1. This design ensures smooth and precise operation of the surgical instrument and is a key transmission link in surgical instruments.

[0102] Next reference Figure 5 and Figure 6 , the description focuses on the principle of controlling the opening and closing of the jaw assembly by moving the rod body 31 along its axial direction.

[0103] Specifically, first refer to Figure 6 As best shown in FIG. , a through-groove 212 is provided on the sidewall of the sleeve body 21, near its second end. A transmission protrusion 2121 is provided on the inner wall of the through-groove 212. The transmission protrusion 2121 extends toward the center of the through-groove 212 and radially toward the inner edge of the sleeve body 21. Correspondingly, an abutment protrusion 121 is provided on the anvil 12. The end of the anvil 12 connected to the rod body 31 is at least partially located within the sleeve body 21, and the abutment protrusion 121 is provided on the side of this end facing away from the magazine unit 11.

[0104] Then return Figure 5 , Figure 5 The diagram shows the structure of the jaw assembly 1 when it is open. Because the sleeve body 21 is fixed, when the driving member 4 rotates counterclockwise, the rod body 31 is driven toward the side where the trigger member 4 is located. The second end of the sleeve body 21 abuts the anvil 12. At the same time, the transmission protrusion 2121 separates from the abutment protrusion 121, and the anvil 12 pivots toward the magazine unit 11 to close the jaw assembly 1.

[0105] It can be understood that when the rod body 31 is driven away from the side where the trigger member 4 is located and moves in the sleeve body 21, the transmission protrusion 2121 abuts against the abutment protrusion 121, and the nail seat 12 pivots away from the magazine unit 11, thereby opening the jaw assembly 1, that is, Figure 5The open state shown in .

[0106] Next reference Figure 7 As shown in the figure, the jaw assembly 1 is mainly composed of a magazine unit 11 and an anvil 12. The magazine unit 11 is used to store nails or instruments required for surgery, while the anvil 12 is responsible for accurately pushing these nails or instruments to the surgical site during surgery. These two parts are respectively mounted on the rod assembly 3, and their functions are controlled by the movement of the rod assembly. During use, at least one of the magazine unit 11 or the anvil 12 can pivot relative to the other to ensure the precise opening and closing of the jaws. This design not only improves the accuracy and efficiency of the surgery, but also greatly simplifies the surgical operation process.

[0107] Specifically, the magazine unit 11 is a key component of the surgical instrument and typically includes a staple cartridge 111 and a cartridge base 112. The staple cartridge 111 is removably mounted to the cartridge base 112 via connectors, facilitating intraoperative replacement. The staple cartridge is positioned between the cartridge base 112 and the anvil 12, enhancing the instrument's flexibility and maintainability.

[0108] During surgery, at least one of the cartridge base 112 and the anvil 12 can pivot relative to the other, thereby ensuring that the jaws can be opened and closed accurately. This structural design helps reduce operational interference and improve surgical accuracy and safety.

[0109] In this embodiment, the bin base 112 is fixed relative to the rod body 31 , and the anvil 12 is drivable to move relative to the bin base 112 .

[0110] Next reference Figure 5 and Figure 8 As shown, Figure 8 The schematic diagram of the movement principle of the surgical instrument of this embodiment shows that, generally speaking, the trigger 4 is the key control component for opening and closing in a laparoscopic surgical instrument. It is stably mounted on the instrument via a mounting shaft 221. The mounting shaft 221 is fixedly arranged perpendicular to the axial direction of the rod assembly 3, providing a stable rotation center for the trigger 4.

[0111] In this embodiment, the trigger member 4 typically comprises a trigger 41, which is mounted on the mounting shaft 221 and can pivot relative to the mounting shaft 221. When an external force acts on the trigger 41 (e.g., by a finger press), it rotates about the mounting shaft 221. This action indirectly controls the movement of the lever assembly 3, thereby driving the jaws to open or close. This design not only simplifies the surgical procedure but also improves the reliability and precision of the surgical instrument. In particular, during endoscopic surgery, this design can significantly reduce interference and improve surgical efficiency.

[0112] It should be noted that, in the present invention, a mounting hole 411 is usually provided on the trigger 41 . The mounting hole 411 is usually provided close to the end away from the operating side, and the mounting shaft 221 can be passed through the mounting hole 411 .

[0113] The trigger 41 is connected to the push block 32 through the connecting rod 5. By rotating the trigger 41, the push block 32 can be controlled to move axially along the rod body 31. The trigger 41 has a connecting portion pivotally connected to the connecting rod 5, and the connecting portion is located between the mounting hole 411 and the operating end of the trigger. Figure 8 As shown in , according to the counterclockwise direction, the trigger 41 is excited so that the trigger 41 moves counterclockwise. The rod body 31 can be pulled towards the side where the trigger 41 is located by the connecting rod 5 and the push block 32, so that the jaw assembly 1 is closed.

[0114] Further, refer to Figure 9 and Figure 10 As shown, the surgical instrument of the present invention is also equipped with a key locking structure, which includes a locking member 61 and a release member 62 connected to each other. When the trigger member 4 drives the jaw assembly 1 to close, the trigger member 4 will tightly cooperate with the locking member 61 to form a stable locked state, which helps to ensure the stability and safety of the jaws during surgery.

[0115] Normally, when the jaw assembly is closed and used to clamp tissue to be cut, the surgical instrument can be placed in this locked state. After cutting, if the jaws need to be reopened, the release member 62 can be operated, which can quickly release the locking member 61 from the locked state and separate it from the trigger member 4, thereby easily opening the jaw assembly.

[0116] Specifically, when the trigger 41 is pulled from Figure 10 When the position in the middle is rotated clockwise, the push block 32 can be pushed to move along the side away from the trigger 41, and the push block 32 drives the rod body 31 to move in the sleeve body 31 toward the side where the jaw assembly is located, and the transmission protrusion 2121 abuts against the abutting protrusion 121, thereby returning the jaw assembly 1 to the Figure 9 The open state shown in .

[0117] This design not only improves surgical safety but also makes the operation more convenient. In short, the locking structure uses simple mechanical principles to achieve precise control of the jaw state, providing additional safety during the operation.

[0118] In the present invention, the trigger member 4 includes not only a trigger 41 but also an annular cantilever 42. The trigger 41 is sleeved on the mounting shaft 221 and is in transmission engagement with the rod assembly 3. Specifically, the trigger 41 can pivot around the mounting shaft.

[0119] Further, refer to Figure 11 As shown in FIG. 1 , as a preferred embodiment of the present invention, as described above, the trigger member 4 is ingeniously designed, including not only the trigger 41 as the main operating component, but also an arc-shaped cantilever 42. The cantilever 42 can be firmly connected to the trigger 41 via a connecting rod 43.

[0120] It can be understood that when the trigger 41 is sleeved on the mounting shaft 221 , the arc-shaped cantilever 42 can rotate around the mounting shaft 221 together with the trigger 41 .

[0121] It is particularly worth mentioning that a retaining groove 421 is provided on the arc-shaped cantilever 42, and the locking member 61 generally includes a hook that cooperates with the retaining groove 421. This design cleverly realizes the locking function of the trigger by cooperating with the retaining groove 421 and the hook 611.

[0122] Specifically, in the locked state, the hook 611 is tightly engaged with the stop groove 421, thereby ensuring that the trigger 41 will not be accidentally triggered, greatly enhancing the safety during the operation. However, when unlocking is required, the release member 62 can be operated.

[0123] Generally speaking, the release member 62 is sleeved on a fixed shaft 621, and the fixed shaft 621 is usually fixedly mounted on the bracket 22. The release member 62 is connected to the locking member 61, and preferably, the two can be provided as an integrally formed structure.

[0124] Furthermore, the release member 62 is pivotally connected to the fixed shaft 621. When the release member 62 is pressed, the release member 62 can rotate around the fixed shaft 621, thereby driving the locking member 61 to rotate around the fixed shaft 621. When the locking member 61 rotates, the locking state between the hook 611 and the retaining groove 421 is broken, and the two separate and unlock.

[0125] In addition, an elastic member is provided between the release member 62 and the bracket 22, so that the release member 62 can automatically return to its original position after the pressing force is removed. When the release member 62 returns to its original position, the trigger 41 is rotated to drive the jaw assembly 1 to close again, and the hook 611 and the stop groove 421 can engage again, thereby realizing the locking function again.

[0126] This design not only ensures safety during surgery but also provides convenient operation. The user can unlock and activate the trigger with a simple press, thereby controlling the opening and closing of the jaws. The entire mechanical structure is both sophisticated and practical, fully demonstrating the superiority of this surgical instrument during surgical operations.

[0127] In summary, the embodiments of the present invention achieve the following technical effects:

[0128] By arranging the jaw assembly 2 on the rod assembly 3, when the trigger member 4 rotates, the rod assembly 3 can be driven to move along its axial direction, thereby driving the jaw assembly 1 to move. During the movement of the jaw assembly 1, it can cooperate with the sleeve assembly 2 to open or close the jaw assembly 1. During this process, the sleeve assembly 2 can remain fixed, reducing the relative displacement with the puncture cannula mounted thereon, thereby greatly improving the surgical accuracy and safety.

[0129] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0130] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0131] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0132] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A surgical instrument, characterized in that: include: a jaw assembly, the jaw assembly being disposed on the rod assembly and being pivotally opened or closed; A cannula assembly, used to be inserted into the cannula of the trocar, and the cannula assembly is in driving cooperation with the jaw assembly; A rod assembly, the rod assembly being inserted into the sleeve assembly and engaging with the trigger member in a transmission manner; And a trigger member that can rotate, when the trigger member rotates, it can drive the rod assembly to move along its axial direction, so that the sleeve assembly and the jaw assembly are transmission-matched, thereby controlling the jaw assembly to open or close.

2. The surgical instrument according to claim 1, wherein The sleeve assembly includes a sleeve body and a bracket for fixing the sleeve body. The bracket is sleeved on the side wall of the sleeve body and arranged close to the first end thereof. The second end of the sleeve body can be transmission-matched with the jaw assembly.

3. The surgical instrument according to claim 2, wherein: A groove is provided on the side wall of the sleeve body near the first end thereof around the circumference thereof, and the bracket is sleeved in the groove.

4. The surgical instrument according to claim 2, wherein: The rod assembly includes a rod body and a push block, the push block is connected to the first end of the rod body and is inserted into the bracket, and the jaw assembly is arranged on the second end of the rod body.

5. The surgical instrument according to claim 4, wherein: The push block is in transmission cooperation with the trigger member through a connecting rod.

6. The surgical instrument according to claim 1, wherein The jaw assembly includes a magazine unit and a nail seat, one end of the magazine unit and one end of the nail seat are respectively arranged on the rod assembly, and at least one of the magazine unit and the nail seat can be pivoted relative to the other to open or close.

7. The surgical instrument according to claim 6, wherein: The magazine unit includes a nail magazine and a magazine base. The nail magazine is detachably mounted on the magazine base through a connecting piece and is located between the magazine base and the nail support. At least one of the magazine base and the nail support can be pivoted relative to the other to open or close.

8. The surgical instrument according to claim 1, wherein The trigger member is provided with a mounting shaft for limiting its position. The mounting shaft is fixedly arranged perpendicular to the axial direction of the rod assembly. The trigger member is sleeved on the mounting shaft and can pivot relative to the mounting shaft.

9. The surgical instrument according to claim 8, wherein It also includes a locking structure, which includes a locking member and a releasing member connected to each other. When the trigger member drives the jaw assembly to close, the trigger member can cooperate with the locking member and be in a fixed locked state, and the releasing member can drive the locking member to break away from the locked state and separate from the trigger member.

10. The surgical instrument according to claim 9, wherein The trigger member includes a trigger and an arc-shaped cantilever arranged on the trigger. The trigger is mounted on the mounting shaft and is in transmission cooperation with the rod assembly. The trigger and the arc-shaped cantilever can pivot around the mounting shaft. A stop groove is provided on the arc-shaped cantilever. The locking member includes a hook that cooperates with the stop groove. In the locked state, the hook is engaged with the stop groove.

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