Intermittent release mechanism for a laparoscopic reciprocating suture device

Abstract

The application provides a laparoscope reciprocating suture device middle wire guide intermittent release mechanism, the suture device comprises a curved needle mounting block, the curved needle mounting block is provided with a curved needle groove, a curved needle is movably arranged in the curved needle groove, the curved needle performs curve movement along the curved needle groove, the curved needle mounting block is provided with a first opening and a second opening, the first opening is located at the front end of the curved needle groove, the second opening is movably connected with a wire guide, the wire guide is connected with a suture wire, and the intermittent release mechanism is arranged at the position of the second opening.The wire guide is limited or released, the wedge-shaped teeth between the rotating buckle and the rotating buckle base, the reset spring and the two-face cutting flange are arranged, so that the curved needle automatically and intermittently draws out the wire guide from the second outlet and separates from the wire guide when reciprocating, the wire guide remains in the second outlet position, manual operation is not required for releasing the wire guide or limiting the wire guide each time, the order of suture wire routing is ensured, and the reliability and convenience of surgical suturing are improved.

Description

Technical Field

[0001] This invention relates to the field of laparoscopic suture device technology, and particularly to an intermittent release mechanism for the midline guide of a laparoscopic reciprocating suture device. Background Technology

[0002] Laparoscopic surgery is a newly developed minimally invasive technique primarily used for intra-abdominal examinations and treatments. During the procedure, when suturing postoperative tissues, the surgeon uses a suture device to continuously pull and release a steel cable, driving the end head to rotate the suture needle, piercing the tissue and suturing it. In laparoscopic surgery, the suture needle typically has an arc-shaped structure; the device's activation causes the needle to rotate, driving the suture to close.

[0003] In existing suturing techniques, the suture needle needs to be intermittently connected and disconnected from the suture thread during suturing. This ensures that the needle does not connect to the suture thread when puncturing human tissue. After puncture, the suture thread is connected again from the second side of the puncture hole and pulled through the puncture hole to the first side. Then, the suture thread is pulled around the human tissue to the second side. After the needle and suture thread separate, the above process is repeated to continuously complete the suturing of human tissue. In current techniques, the intermittent connection and disconnection of the suture needle and suture thread usually requires manual operation and cannot be automated. This adds operational steps to the continuous suturing process, reduces surgical suturing efficiency, and may affect the quality of surgical suturing due to the cumbersome operation. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanism that can automatically and intermittently connect and release sutures, addressing the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides an intermittent release mechanism for the midline guide of a laparoscopic reciprocating suture device. The suture device includes a curved needle mounting block with a curved needle groove. A curved needle is movably mounted within the curved needle groove, and the curved needle moves in a curved path along the groove. The curved needle mounting block has a first opening and a second opening, the first opening being located at the front end of the curved needle groove. The invention is characterized in that…

[0006] The second opening is movably connected to a wire guide, which is connected to a suture. The intermittent release mechanism is located at the second opening and is used to limit or release the wire guide.

[0007] The intermittent release mechanism includes a rotating buckle and a rotating buckle base. The second opening is connected to a mounting groove. The rotating buckle and the rotating buckle base are both disposed in the mounting groove. The rotating buckle is located at the first end of the mounting groove, and the rotating buckle base is located at the second end of the mounting groove. The rotating buckle and the rotating buckle base have wedge-shaped teeth that cooperate with each other. An elastic element is also provided between the rotating buckle base and the rotating buckle. The second end of the wire guide is provided with a double-sided cutting flange. The rotating buckle is provided with an end hole. When the double-sided cutting flange is in a first angle position relative to the rotating buckle, it can pass through the end hole of the rotating buckle. When the double-sided cutting flange is in a second angle position relative to the rotating buckle, the double-sided cutting flange cannot be dislodged from the end hole of the rotating buckle.

[0008] Furthermore, the first end of the wire guide is provided with a tapered locking groove corresponding to the puncture tip of the curved needle.

[0009] Furthermore, the wire guide is made of an elastic material and has grooves on its surface so that it can expand or contract elastically.

[0010] Furthermore, both the rotating buckle and the rotating buckle base are cylindrical, and the elastic element is a return spring, with both ends of the return spring located inside the rotating buckle and the rotating buckle base, respectively.

[0011] Furthermore, the width of the two opposite sides of the two-sided cutting flange is smaller than the width of the other two sides, and a limiting step is provided inside the end hole of the swivel buckle. When the two-sided cutting flange is in the second angle position relative to the swivel buckle, the two-sided cutting flange abuts against the limiting step.

[0012] Furthermore, the rotating buckle and the base of the rotating buckle each have four wedge-shaped teeth that are evenly distributed around it, so that the rotating buckle rotates 90 degrees each time.

[0013] Furthermore, the first end of the rotating buckle is provided with a misalignment drive groove, and the first end of the mounting groove is provided with a wedge-shaped boss corresponding to the misalignment drive groove. When the rotating buckle is elastically reset, the misalignment drive groove and the wedge-shaped boss gradually cooperate to make the rotating buckle rotate forward by a preset small angle.

[0014] Furthermore, the rotary buckle has four misaligned drive slots and the mounting slot has four wedge-shaped bosses that are evenly distributed around it.

[0015] The above-described solution of the present invention has the following beneficial effects:

[0016] The intermittent release mechanism of the suture guide in the laparoscopic reciprocating suture provided by the present invention, through the setting of wedge teeth, return spring, and double-sided cutting flange between the rotating buckle and the rotating buckle base, can automatically and intermittently pull out the suture guide from the second outlet and separate it from the suture guide during the reciprocating motion of the curved needle during the surgical suturing process, so that the suture guide remains in the second outlet position. There is no need to manually release or restrict the suture guide each time, which ensures the orderly flow of the suture and improves the reliability and convenience of surgical suturing.

[0017] Other beneficial effects of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the curved needle module of the present invention;

[0019] Figure 2 This is a schematic diagram of the intermittent release mechanism of the wire guide head of the present invention;

[0020] Figure 3 This is a schematic diagram of the intermittent release mechanism of the wire guide head of the present invention, wherein (a) is the release state and (b) is the restriction state;

[0021] Figure 4 This is a schematic diagram of the two-sided cutting flange and the limiting step of the present invention.

[0022] [Explanation of Labels in the Attached Image]

[0023] 1-Crank pin mounting block; 2-Crank pin groove; 3-Crank pin; 4-First opening; 5-Second opening; 6-Wire guide; 7-Conical clamping groove; 8-Gutter; 9-Rotating buckle; 10-Rotating buckle base; 11-Mounting groove; 13-Wedge tooth; 14-Reset spring; 15-Double-sided cutting flange; 16-Limiting step; 17-Misalignment drive groove. Detailed Implementation

[0024] To make the technical problems, solutions, and advantages of this invention clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Embodiments of the present invention provide an intermittent release mechanism for the midline guide of a laparoscopic reciprocating suture device. The suture device includes a control body and a curved needle module. The curved needle module and the control body are connected via a control connecting rod. The control body is connected to corresponding components on the curved needle module via a control wire to control the components on the curved needle module to drive the curved needle in reciprocating motion. Figure 1 As shown, the curved needle module includes a curved needle mounting block 1, with a curved needle groove 2 at its end. A curved needle 3 is movably mounted within the curved needle groove 2, and the shape of the curved needle 3 is consistent with that of the curved needle groove 2, allowing it to move along a curved path. In a preferred embodiment, both the curved needle groove 2 and the curved needle 3 are arc-shaped, thus the curved needle 3 reciprocates on a circumference, facilitating control and smoother force transmission.

[0028] It should be noted that in this embodiment, the curved needle groove 2 is not a complete circle (360 degrees), but rather an arc segment located inside the curved needle mounting block 1. The ends of the curved needle mounting block 1 are provided with a first opening 4 and a second opening 5. The first opening 4 is located at the front end of the curved needle groove 2. When the curved needle 3 performs a suturing action, the puncture tip of the curved needle 3 exits through the first opening 4, passes through the human tissue, and then enters the second opening 5.

[0029] The intermittent release mechanism of the suture guide 6 is located at the second opening 5. The suture guide 6 is movably connected to the second opening 5 and is also connected to the suture. When the curved needle 3 returns to its original position, the intermittent release mechanism releases the suture guide 6. The puncture tip of the curved needle 3 drives the suture guide 6 back from the puncture site in the human tissue and then back into the first opening 4. The suture guide 6, carrying the suture, passes through the puncture site in the human tissue and remains at the first opening 4. The curved needle 3 performs a second suturing action, but without puncturing the human tissue, allowing the suture guide 6 to bypass the human tissue and return to the second opening 5. The curved needle 3 returns to its original position again, this time with the intermittent release mechanism restricting the suture guide 6. Therefore, the suture guide 6 separates from the curved needle 3 and remains at the second opening 5. The above steps are repeated for a second puncture, thus sequentially and continuously completing the suturing of the human tissue.

[0030] It is understandable that suturing human tissue requires numerous reciprocating movements of the curved needle 3 and the release and restriction switching of the suture guide 6. Manual switching would make the suturing procedure overly cumbersome and reduce efficiency. Therefore, this embodiment employs an automatic switching mechanism for the intermittent release of the suture guide 6 to control its release and restriction states.

[0031] At the same time, such as Figure 2 As shown, the first end of the wire guide 6 is provided with a conical locking groove 7 corresponding to the puncture tip of the curved needle 3. When the puncture tip of the curved needle 3 is inserted into the conical locking groove 7, it can be quickly and smoothly inserted by being guided by the conical surface of the conical locking groove 7. The wire guide 6 is made of elastic material and has a groove 8 on its surface, which can expand as a whole to ensure that the puncture tip is inserted smoothly as a whole. After insertion, the stepped surface of the rear part of the puncture tip can engage with the stepped surface of the conical locking groove 7. When the wire guide 6 is elastically contracted, the wire guide 6 can move out of the second opening 5 with the curved needle 3 when it is not restricted by the intermittent release mechanism of the wire guide 6; when the intermittent release mechanism of the wire guide 6 restricts the wire guide 6, the wire guide 6 can expand again during the withdrawal of the curved needle 3, so that the curved needle 3 is separated from the wire guide 6, and the wire guide 6 remains in the position of the second opening 5.

[0032] The intermittent release mechanism for the wire guide includes a rotating buckle 9 and a rotating buckle base 10. Both the rotating buckle 9 and the rotating buckle base 10 are located in a mounting groove 11 behind the second opening 5, and the mounting groove 11 is connected to the second opening 5. The rotating buckle 9 is located at the first end of the mounting groove 11, and the rotating buckle base 10 is located at the second end of the mounting groove 11. The two have mutually engaging wedge-shaped teeth 13. A return spring 14 is also provided between the rotating buckle base 10 and the rotating buckle 9, with its two ends located inside the cylindrical rotating buckle 9 and the rotating buckle base 10, respectively.

[0033] The second end of the wire guide 6 is provided with a double-cut flange 15, whose opposite sides are cut (i.e., the width is reduced). Simultaneously, the swivel buckle 9 is provided with an end hole, similar in shape to the double-cut flange 15. A limiting step 16 is provided inside the end hole, allowing the double-cut flange 15 to pass through the end hole and enter the swivel buckle 9 when it is in the first angular position relative to the swivel buckle 9. When the swivel buckle 9 rotates and the double-cut flange 15 is in the second angular position relative to the swivel buckle 9, the ends of the double-cut flange 15 abut against the limiting step 16 and cannot disengage from the swivel buckle 9. Therefore, when the swivel needle 3 retracts, it can smoothly separate from the wire guide 6. Figure 3 , Figure 4 As shown.

[0034] During the process of the two-sided cutting flange 15 entering the rotating buckle 9, the wire guide head 6 also moves towards the mounting groove 11, which can push the rotating buckle 9 towards the rotating buckle base 10, so that the wedge teeth 13 of the two engage and push the rotating buckle 9 along the inclined tooth surface to rotate at a preset angle (at this time, the two-sided cutting flange 15 is in the second angle position relative to the rotating buckle 9). When the crank needle 3 is withdrawn, under the action of the return spring 14, the rotating buckle 9 returns to the first end of the mounting groove 11. At this time, the two-sided cutting flange 15 cannot be disengaged from the rotating buckle 9 in the second angle position, so the crank needle 3 can be smoothly separated from the wire guide head 6 when it withdraws. When the curved needle 3 is inserted into the wire guide head 6 again, with the cooperation of the wedge teeth 13, the rotating buckle 9 rotates at a preset angle until the two-sided cutting flange 15 is back to the first angle position relative to the rotating buckle 9. After the curved needle 3 is withdrawn, under the action of the return spring 14, the rotating buckle 9 returns to the first end of the mounting groove 11. At the first angle position, the wire guide head 6 is in the released state, and the two-sided cutting flange 15 can be disengaged from the rotating buckle 9. Therefore, when the curved needle 3 is withdrawn, it drives the wire guide head 6 to smoothly leave the rotating buckle 9 and the second opening 5.

[0035] Considering the shape of the double-cut flange 15, which is cut on its opposite sides, the rotation angle of the rotating buckle 9 is set to 90 degrees each time. Four pairs of wedge-shaped teeth 13 are evenly distributed around the rotating buckle 9 and the rotating buckle base 10. Therefore, the rotating buckle 9 rotates 90 degrees sequentially. When it is at 0 degrees and 180 degrees phase, the double-cut flange 15 is in the first angular position relative to the rotating buckle 9, at which point the intermittent release mechanism of the wire guide 6 is in the release state. When the rotating buckle 9 is at 90 degrees and 270 degrees phase, the double-cut flange 15 is in the second angular position relative to the rotating buckle 9, at which point the intermittent release mechanism of the wire guide 6 is in the restraint state. This achieves the intermittent disengagement of the wire guide 6 from the curved needle 3 during the sewing process.

[0036] It should be noted that both the rotating buckle 9 and the rotating buckle base 10 have four wedge-shaped teeth 13, each occupying a phase angle of 90 degrees. When the rotating buckle 9 is reset under the action of the return spring 14, during its second movement towards the rotating buckle base 10, the wedge-shaped teeth 13 on the rotating buckle 9 and the (later phase) wedge-shaped teeth 13 on the rotating buckle base 10 may not be perfectly aligned (for example, the rotating buckle 9 only rotated 89 degrees in the previous movement). This causes the rotating buckle 9 to fail to rotate 90 degrees during the second movement to achieve a state switch. Please refer to [the relevant documentation] for further information. Figure 1 In this embodiment, a misalignment drive slot 17 is provided at the first end of the rotating buckle 9, and a wedge-shaped boss corresponding to the misalignment drive slot 17 is provided at the first end of the mounting groove 11. When the rotating buckle 9 is reset under the action of the reset spring 14, the first end of the rotating buckle 9 will gradually contact the first end of the mounting groove 11. Therefore, the misalignment drive slot 17 will gradually cooperate with the wedge-shaped boss, so that the rotating buckle 9 will rotate forward by a small angle for correction. In this embodiment, it is preferably 8 degrees to ensure that the rotating buckle 9 rotates to a phase of multiples of 90 degrees + 8 degrees after each elastic reset, so that it can cooperate smoothly with the rotating buckle base 10.

[0037] The first end of the rotating buckle 9 has four misaligned drive slots 17 and four wedge-shaped protrusions at the first end of the mounting slot 11. After each rotation of the rotating buckle 9, when it is reset, the misaligned drive slots 17 cooperate with the wedge-shaped protrusions on the previous phase in sequence to ensure that the rotating buckle 9 can rotate forward by a corresponding small angle each time.

[0038] In summary, the intermittent release mechanism of the suture guide provided in this embodiment enables the suture needle 3 to automatically and intermittently pull the suture guide 6 out of the second outlet 5 and separate it from the suture guide 6 during the reciprocating motion of the suture during surgical suturing, leaving it at the position of the second outlet 5. This eliminates the need for manual operation to release or restrict the suture guide 6 each time, ensuring the orderly flow of the suture and improving the reliability and convenience of surgical suturing.

[0039] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A laparoscopic reciprocating suture device with an intermittent release mechanism for the midline guide, the suture device comprising a curved needle mounting block, the curved needle mounting block having a curved needle groove, a curved needle being movably disposed within the curved needle groove, the curved needle moving in a curved path along the curved needle groove, the curved needle mounting block having a first opening and a second opening, the first opening being located at the front end of the curved needle groove, characterized in that, The second opening is movably connected to a wire guide, which is connected to a suture. The intermittent release mechanism is located at the second opening and is used to limit or release the wire guide. The intermittent release mechanism includes a rotating buckle and a rotating buckle base. The second opening is connected to a mounting groove. The rotating buckle and the rotating buckle base are both disposed in the mounting groove. The rotating buckle is located at the first end of the mounting groove, and the rotating buckle base is located at the second end of the mounting groove. The rotating buckle and the rotating buckle base have wedge-shaped teeth that cooperate with each other. An elastic element is also provided between the rotating buckle base and the rotating buckle. The second end of the wire guide is provided with a double-sided cutting flange. The rotating buckle is provided with an end hole. When the double-sided cutting flange is in a first angle position relative to the rotating buckle, it can pass through the end hole of the rotating buckle. When the double-sided cutting flange is in a second angle position relative to the rotating buckle, the double-sided cutting flange cannot be dislodged from the end hole of the rotating buckle.

2. The intermittent release mechanism of the midline guide of the laparoscopic reciprocating suture device according to claim 1, characterized in that, The first end of the wire guide is provided with a tapered locking groove corresponding to the puncture tip of the curved needle.

3. The intermittent release mechanism for the midline guide of a laparoscopic reciprocating suture device according to claim 2, characterized in that, The wire guide is made of elastic material and has grooves on its surface so that it can expand or contract elastically.

4. The intermittent release mechanism of the midline guide of the laparoscopic reciprocating suture device according to claim 1, characterized in that, Both the rotating buckle and the rotating buckle base are cylindrical, and the elastic element is a return spring, with both ends of the return spring located inside the rotating buckle and the rotating buckle base, respectively.

5. The intermittent release mechanism of the midline guide of the laparoscopic reciprocating suture device according to claim 1, characterized in that, The width of the two opposite sides of the two-sided cutting flange is smaller than the width of the other two sides. A limiting step is provided inside the end hole of the swivel buckle. When the two-sided cutting flange is in the second angle position relative to the swivel buckle, the two-sided cutting flange abuts against the limiting step.

6. The intermittent release mechanism of the midline guide of the laparoscopic reciprocating suture device according to claim 5, characterized in that, The rotating buckle and the base of the rotating buckle each have four wedge-shaped teeth that are evenly distributed around it, so that the rotating buckle rotates 90 degrees each time.

7. The intermittent release mechanism for the midline guide of a laparoscopic reciprocating suture device according to claim 6, characterized in that, The first end of the rotating buckle is also provided with a misalignment drive groove, and the first end of the mounting groove is provided with a wedge-shaped boss corresponding to the misalignment drive groove. When the rotating buckle is elastically reset, the misalignment drive groove and the wedge-shaped boss gradually cooperate to make the rotating buckle rotate forward by a preset small angle.

8. The intermittent release mechanism of the midline guide of the laparoscopic reciprocating suture device according to claim 7, characterized in that, The rotating buckle has four misaligned drive slots, and the mounting slot has four wedge-shaped bosses that are evenly distributed around it.

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