Suture device

Abstract

The utility model provides a kind of suturing device, it is related to medical instrument technical field.The utility model provides a kind of suturing device, comprising: suture needle, transmission part and driving part;Suture needle is connected with transmission part transmission, driving part is connected with transmission part transmission;Transmission part is surrounded and is formed with the passage corresponding to endoscope.The suturing device not only adapts to in endoscope operation in narrow space and carries out suture operation, can ensure that suture needle is smoothly driven, also can reduce the compression that suturing device produces to endoscope field of view, the visibility of under endoscope suture operation is guaranteed, applicable to in minimally invasive surgery and carries out accurate suture operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a suture device. Background Technology

[0002] In endoscopic minimally invasive surgery, especially transluminal endoscopic surgery through the natural orifices of the digestive tract, the surgical space is relatively confined, posing a significant challenge to suturing. Due to this limited space, the layout of the suture mechanism is strictly constrained. This constraint not only affects the mechanical performance of the instruments, causing transmission sluggishness and increasing the difficulty of suturing, but also potentially leads to a double problem due to the suture mechanism obstructing the endoscopic view: firstly, the effective field of view of the endoscope is significantly compressed; secondly, it is difficult to obtain clear image information during suturing, thus affecting the accuracy and safety of the surgery. This combined effect of spatial constraints and visual interference places higher demands on the precision of the surgical procedure. Furthermore, some existing techniques employ a C-shaped arc needle design. Due to the planar plate structure, the suture space of the C-shaped notch is small, resulting in insufficient tissue capacity and limited puncture depth, thus restricting its application. Especially in minimally invasive surgery under flexible endoscopy, it can only be used for simple wound suturing and is not well-suited for gastric volume reduction surgery involving folded gastrointestinal tissue. Utility Model Content

[0003] The purpose of this invention is to provide a suture device to alleviate the technical problem that the transmission mechanism of the suture device compresses the field of view of the endoscope and affects the visibility of suture operations under endoscopy.

[0004] The suture device provided by this utility model includes: a suture needle, a transmission component, and a driving component; the suture needle is drivenly connected to the transmission component, and the driving component is drivenly connected to the transmission component; the transmission component at least partially surrounds and forms a channel corresponding to an endoscope.

[0005] Furthermore, the rotation axis of the transmission component coincides with the rotation axis of the suture needle.

[0006] Furthermore, the channel extends axially from the inside of the transmission member along the rotation axis of the transmission member and passes through the area enclosed by the movement trajectory of the suture needle.

[0007] Furthermore, the suture needle is intermittently and unidirectionally connected to the transmission component.

[0008] Furthermore, the rotation axis of the transmission component is parallel to the axis of the endoscope, with a distance of 0 to 5 mm between them.

[0009] Furthermore, the drive member drives the transmission member by rotational motion.

[0010] Furthermore, the driving component includes a flexible shaft and a driving gear; the driving gear cooperates with the transmission component for transmission, the distal end of the flexible shaft is connected to the driving gear, and the flexible shaft extends proximally along the endoscope.

[0011] Furthermore, the outer or inner ring of the transmission component is provided with teeth that are adapted to the drive gear.

[0012] Furthermore, the transmission component is rotatably mounted inside the housing.

[0013] Furthermore, the housing is provided with a side window facing the transmission member;

[0014] The side window includes: a wound tissue accommodating opening traversed by the movement trajectory of the suture needle, and a field of view opening facing the transmission component.

[0015] Furthermore, the outer shell is provided with a sliding groove, and the suture needle slides into the sliding groove; the outer shell is movably connected to a needle cover, and the suture needle is located between the outer shell and the needle cover.

[0016] Furthermore, a support member is installed inside the housing, and the transmission member is installed between the support member and the housing.

[0017] Furthermore, the support member is provided with an annular groove, and the transmission member is installed in the annular groove.

[0018] Furthermore, the transmission component is provided with an elastic locking part, which abuts against the suture needle.

[0019] Furthermore, the suture needle is provided with a locking position adapted to the elastic locking part; when the transmission member rotates along the first direction, the elastic locking part engages with the locking position and drives the tip of the suture needle to move in the first direction.

[0020] Furthermore, the suture needle is provided with an inclined surface extending from the locking position in a second direction opposite to the first direction; when the transmission member rotates in the second direction, the elastic locking portion slides away from the locking position along the inclined surface.

[0021] Furthermore, the suture needle is provided with a one-way limiting part; the suture device also includes a retaining spring adapted to the one-way limiting part, the retaining spring being inclined toward the suture needle in a first direction; when the tip of the suture needle moves in the first direction, the suture needle slides relative to the retaining spring; when the transmission member rotates in a second direction away from the first direction, the retaining spring abuts against the one-way limiting part to prevent the suture needle from rotating in the second direction.

[0022] Furthermore, the driving component includes: a first rack, a second rack, and a drive wheel assembly; the drive wheel assembly is connected to the transmission component; the first rack and the second rack are spaced apart, and the drive wheel assembly is engaged between the first rack and the second rack.

[0023] Furthermore, the transmission component and the driving component are connected by a belt or chain drive.

[0024] Furthermore, the transmission component includes: an arc-shaped rack and a movable gear; the arc-shaped rack has continuous teeth extending from the inner ring to the outer ring, and the movable gear meshes with the continuous teeth; furthermore, one of the arc-shaped rack and the movable gear is connected to the suture needle in a transmission connection, and the other of the arc-shaped rack and the movable gear is connected to the drive component in a transmission connection.

[0025] Furthermore, the transmission member is provided with a starting limiting part and an ending limiting part, which are spaced apart along the circumference of the transmission member.

[0026] When the driving member drives the transmission member to reciprocate by switching the direction of motion, the transmission member is located between the starting limit part engaged with the starting position of the driving member and the ending limit part engaged with the ending position of the driving member.

[0027] This invention offers the following advantages: By connecting the suture needle to the transmission component and the drive component to the transmission component, with the transmission component at least partially forming a channel corresponding to the endoscope, the suture needle is not only smoothly driven, but the compression of the suture device on the endoscopic field of view is also reduced, ensuring visibility of the suture operation under endoscopy. This makes it suitable for precise suture operations in minimally invasive surgery. Furthermore, the channel formed by the transmission component can accommodate more tissue within the suture area of ​​the suture needle, allowing for layered suturing of the wound within the endoscopic field of view, thus broadening its application range.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1A cross-sectional view of a first type of suture device and endoscope provided for an embodiment of this utility model;

[0031] Figure 2 A schematic diagram illustrating the removal of the needle cap from a first type of suture device provided in this embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the first type of suture provided in this embodiment of the present utility model;

[0033] Figure 4 A schematic diagram showing the removal of the outer shell and needle cap from the first type of sewing device provided in this embodiment of the utility model;

[0034] Figure 5 Exploded view of the second type of suture device and endoscope provided for the embodiments of this utility model;

[0035] Figure 6 A cross-sectional view of a second type of suture device and endoscope provided for an embodiment of this utility model;

[0036] Figure 7 Exploded view of the third type of suture and endoscope provided for the embodiments of this utility model;

[0037] Figure 8 Exploded view of the fourth type of suture and endoscope provided for the embodiments of this utility model;

[0038] Figure 9 Exploded view of the fifth type of suture device and endoscope provided for the embodiments of this utility model;

[0039] Figure 10 Exploded view of the sixth type of suture and endoscope provided for the embodiments of this utility model;

[0040] Figure 11 A schematic diagram of a suture needle provided in an embodiment of this utility model;

[0041] Figure 12 A schematic diagram of a transmission component for a suture needle provided in an embodiment of this utility model;

[0042] Figure 13 A schematic diagram of the suture device provided in the embodiment of this utility model in the needle cap open state;

[0043] Figure 14 A cross-sectional view of the stitcher provided in this embodiment of the present invention when the transmission component is in the starting position;

[0044] Figure 15 A cross-sectional view of the stitcher provided in this embodiment of the present invention when the transmission component is in the termination position;

[0045] Figure 16A schematic diagram of the first rack, second rack, drive wheel assembly, transmission component, and suture needle of the suture device provided in an embodiment of this utility model;

[0046] Figure 17 A schematic diagram showing the state of the suture device during suturing operations, as provided in an embodiment of this utility model;

[0047] Figure 18 This is a schematic diagram showing another state of the suture device provided in this embodiment of the present invention during suturing operations.

[0048] Icons: 100 - Suture needle; 101 - Locking position; 102 - Bevel; 103 - One-way limiting part; 200 - Transmission component; 201 - Channel; 202 - Tooth; 203 - Elastic locking part; 204 - Starting limiting part; 205 - Ending limiting part; 210 - Arc-shaped rack; 211 - Continuous teeth; 220 - Movable gear; 300 - Driving component; 310 - Flexible shaft; 320 - Driving gear; 330 - First rack; 340 - Second rack; 350 - Driving wheel assembly; 351 - Cylindrical gear; 352 - Bevel gear; 400 - Housing; 401 - Side window; 402 - Slide groove; 500 - Support component; 501 - Annular groove; 502 - Fixing ring; 600 - Anti-reverse spring; 700 - Needle cap; 800 - Endoscope; 900 - Tissue to be sutured. Detailed Implementation

[0049] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are only used to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed 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 utility model based on the specific circumstances.

[0052] like Figure 1 As shown, the suture device provided in this embodiment of the present invention includes: a suture needle 100, a transmission member 200, and a driving member 300; the suture needle 100 is connected to the transmission member 200 in a transmission manner, and the driving member 300 is connected to the transmission member 200 in a transmission manner; the transmission member 200 at least partially surrounds and forms a channel 201 corresponding to the endoscope 800. The transmission member 200 may be configured as a ring structure around the channel 201, or it may extend circumferentially along the channel 201 into an arc-shaped structure.

[0053] In an optional embodiment, the drive unit 300 can provide rotational power manually or electrically, and drive the transmission unit 200 through the drive unit 300. The transmission unit 200 then drives the suture needle 100 to move through gear transmission, belt transmission, or friction contact. The channel 201 can reduce the obstruction of the endoscope 800's field of vision by the suture device, thereby enabling the endoscope 800 to perform suturing operations with clear images, which is beneficial to improving the accuracy and safety of minimally invasive surgical suturing operations.

[0054] In an optional embodiment, the rotation axis of the transmission member 200 coincides with the rotation axis of the suture needle 100. The channel 201 extends axially from the inside of the transmission member 200 along its rotation axis and passes through the area enclosed by the movement trajectory of the suture needle 100. When the transmission member 200 is driven to rotate, it drives the suture needle 100 to move around the same rotation axis, ensuring not only smooth transmission but also that the endoscope 800 can sequentially pass through the area enclosed by the channel 201 and the movement trajectory of the suture needle 100 to form a better field of view.

[0055] In an optional embodiment, the suture needle 100 and the transmission component 200 are intermittently and unidirectionally connected. The transmission component 200 can drive the suture needle 100 to perform the suturing action through a unidirectional transmission device such as a ratchet. After one suturing action is completed, the suture needle 100 can continue to rotate along the motion trajectory and then move back to the starting position of the suture needle 100.

[0056] In an optional embodiment, the rotation axis of the transmission member 200 is parallel to the axis of the endoscope 800, with a distance of 0 to 5 mm. By slightly offsetting the rotation axis of the endoscope 800 relative to the transmission member 200, the operating status of the transmission member 200 can be observed while ensuring sufficient field of view for the endoscope 800. Furthermore, the rotation axis of the endoscope 800 relative to the transmission member 200 can be shifted closer to the area where the suture needle 100 is performing its suturing work, thereby obtaining better imaging of the wound suturing site.

[0057] like Figure 1 and Figure 6 As shown, in an optional embodiment, the rotation axis of the transmission member 200 is parallel to and spaced apart from the axis of the endoscope 800, or the rotation axis of the transmission member 200 has an angle with the axis of the endoscope 800.

[0058] The distal end of the suture device has a notch for the insertion of the suture needle 100. The endoscope 800 can be deflected toward the notch. During suturing, the movement of the suture needle 100 can be clearly observed through the endoscope 800. After suturing, the suture needle 100 moves away from the notch, and the field of view of the endoscope 800 extends outward from the notch, thus obtaining a wider field of view.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the drive component 300 drives the transmission component 200 by rotation. It can be a rigid or flexible shaft that extends along the endoscope 800 to the proximal end (operating end). The operator can drive the transmission component 200 by turning the shaft. The transmission mechanism has a smaller layout space and is more convenient to operate.

[0060] Furthermore, the drive unit 300 includes a flexible shaft 310 and a drive gear 320; the drive gear 320 cooperates with the transmission unit 200 for transmission, the distal end of the flexible shaft 310 is connected to the drive gear 320, and the flexible shaft 310 extends proximally along the endoscope 800.

[0061] The drive gear 320 can be configured as a cylindrical gear or a bevel gear. The flexible shaft 310 is connected to the drive gear 320 and is circumferentially fixed. The drive gear 320 meshes with the transmission component 200 for transmission. By turning the flexible shaft 310, the drive gear 320 can be driven to rotate, and the rotating drive gear 320 drives the transmission component 200 to rotate.

[0062] It should be noted that, in the optional implementation, the number of teeth of the drive gear 320 is less than the number of teeth of the transmission component 200. On the one hand, the axial dimension of the transmission component 200 is larger, which can form a larger channel 201. On the other hand, the drive gear 320 requires less driving force, making the turning operation easier.

[0063] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the outer ring, inner ring or axial end face of the transmission component 200 is provided with teeth 202 that are adapted to the drive gear 320.

[0064] In one alternative embodiment, the outer ring of the transmission member 200 is provided with teeth 202, and the drive gear 320 is engaged with the outer ring of the transmission member 200, thereby the entire inner ring of the transmission member 200 is used to form the channel 201, which can maximize the field of view of the endoscope 800.

[0065] In another alternative embodiment, the inner ring of the transmission member 200 is provided with teeth 202, and the drive gear 320 is engaged with the inner ring of the transmission member 200. The drive gear 320 is installed on the inner side of the transmission member 200, thereby reducing the radial dimension of the suture device, which is especially suitable for minimally invasive surgery with small incisions.

[0066] like Figures 1 to 10 As shown, the transmission component 200 is rotatably mounted inside the housing 400, and the housing 400 provides mounting space for the sewing needle 100, the transmission component 200, and the drive component 300.

[0067] Furthermore, the housing 400 is provided with a side window 401 facing the transmission member 200. The side window 401 includes a wound tissue receiving opening traversed by the movement trajectory of the suture needle 100, and a viewing opening facing the transmission member 200. The viewing opening provides a wider field of view for the endoscope 800, and allows observation of the position and status of the transmission member 200 before and after surgery. During suturing, tissue from the wound site can enter the wound tissue receiving opening, and the suture needle 100 can pass through the opening to perform the suturing action on the wound site.

[0068] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the outer casing 400 is provided with a sliding groove 402, in which the suture needle 100 slides and engages; a needle cover 700 is movably connected to the outer casing 400, and the suture needle 100 is located between the outer casing 400 and the needle cover 700. This facilitates the assembly of the suture needle 100 and allows the suture needle 100 to be replaced when damaged by removing the needle cover 700.

[0069] See Figure 13 The needle cover 700 can be opened and closed by sliding or hinge relative to the outer shell 400. When the needle cover 700 is open, the suture needle 100 can be disassembled and cleaned.

[0070] See Figure 2 During the suturing action, the suture needle 100 slides along the groove 402. The movement trajectory of the suture needle 100 is constrained by the groove 402, ensuring that the movement of the suture needle 100 is smooth and stable.

[0071] In an optional embodiment, the housing 400 is provided with a stroke limiting portion corresponding to the transmission member 200, and the transmission member 200 rotates relative to the housing 400 within the limiting range of the stroke limiting portion. The stroke limiting portion can be configured as a limiting groove adapted to the transmission member 200, or as limiting protrusions provided at both ends of the rotational stroke of the transmission member 200, to constrain the angular range of the rotational stroke of the transmission member 200.

[0072] Alternatively, a limiting groove adapted to the transmission component 200 can be set inside the slide groove 402, and the limiting groove can be extended in an arc around the rotation axis of the transmission component 200. The transmission component 200 is connected to the sewing needle 100 through the elastic snap-fit ​​part 203. The elastic snap-fit ​​part 203 is slidably engaged in the limiting groove, thereby limiting the rotation stroke of the transmission component 200.

[0073] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, a support member 500 is installed inside the outer casing 400, and a transmission member 200 is installed between the support member 500 and the outer casing 400.

[0074] The transmission component 200 and the support component 500 are coaxially arranged, and the support component 500 can support the transmission component 200 radially.

[0075] In an optional embodiment, the transmission member 200 may be configured as a ring structure or as an arc-shaped structure extending circumferentially along the support member 500, and the transmission member 200 may slide smoothly around the support member 500 between the support member 500 and the housing 400.

[0076] See Figure 9The support member 500 is provided with an annular groove 501, and the transmission member 200 is installed in the annular groove 501, thereby reducing the radial dimension of the transmission member 200 and thus reducing the outer diameter of the suture, making it more suitable for surgeries with smaller incisions.

[0077] In addition, a fixing ring 502 is connected to the support member 500. The fixing ring 502 abuts against the shaft end of the transmission member 200, thereby fixing the transmission member 200 axially relative to the support member 500.

[0078] like Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the transmission component 200 is provided with an elastic locking part 203, which abuts against the suture needle 100. The elastic locking part 203 can be configured as a spring plunger or other elastic telescopic device. By abutting against the suture needle 100 through the elastic locking part 203, when the transmission component 200 rotates, the elastic locking part 203 can drive the suture needle 100 to move synchronously.

[0079] like Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the suture needle 100 is provided with a locking position 101 that is adapted to the elastic locking part 203; when the transmission member 200 rotates in the first direction, the elastic locking part 203 engages with the locking position 101 and drives the tip of the suture needle 100 to move in the first direction, which can prevent the transmission member 200 from slipping relative to the suture needle 100 during suturing.

[0080] Additionally, the suture needle 100 has an inclined surface 102 extending from the locking position 101 in a second direction opposite to the first direction; when the transmission member 200 rotates in the second direction, the elastic locking portion 203 disengages from the locking position 101 along the inclined surface 102. When the transmission member 200 is driven to rotate in the second direction in the opposite direction, the elastic locking portion 203 slides away from the locking position 101 along the inclined surface 102, and the suture needle 100 remains stationary, while the transmission member 200 only drives the suture needle 100 to perform suturing operations in the first direction.

[0081] Furthermore, the suture needle 100 is provided with a one-way limiting part 103; the suture device also includes a backstop spring 600 adapted to the one-way limiting part 103, the backstop spring 600 being inclined toward the suture needle 100 in a first direction; when the tip of the suture needle 100 moves in the first direction, the suture needle 100 slides relative to the backstop spring 600; when the transmission member 200 rotates in a second direction away from the first direction, the backstop spring 600 abuts against the one-way limiting part 103 to prevent the suture needle 100 from rotating in the second direction, thereby improving the stability of the suture needle 100 being driven in one direction.

[0082] like Figure 8 , Figure 9 and Figure 10 As shown, the driving component 300 includes a first rack 330, a second rack 340, and a drive wheel assembly 350. The drive wheel assembly 350 is connected to the transmission component 200. The first rack 330 and the second rack 340 are spaced apart, and the drive wheel assembly 350 is fitted between the first rack 330 and the second rack 340. Both the first rack 330 and the second rack 340 can be connected to a flexible shaft or rod. One of the first rack 330 and the second rack 340 bears a thrust, and the other bears a tension, thereby causing the drive wheel assembly 350 to rotate. The drive wheel assembly 350 drives the transmission component 200, thereby realizing the sewing action and the return action of the transmission component 200.

[0083] See Figure 16 The drive gear set 350 may include a coaxially connected cylindrical gear 351 and a bevel gear 352, and the cylindrical gear 351 and the bevel gear 352 may be machined into a single structure. The cylindrical gear 351 is engaged between the first rack 330 and the second rack 340, while the bevel gear 352 is used to engage with the transmission member 200, thereby driving the transmission member 200.

[0084] In addition to the above embodiments, the transmission component 200 and the drive component 300 can also be connected by belt or chain transmission.

[0085] like Figure 12 As shown, in an optional embodiment, the transmission member 200 includes: an arc-shaped rack 210 and a movable gear 220; the arc-shaped rack 210 has continuous teeth 211 extending from the inner ring to the outer ring, and the movable gear 220 meshes with the continuous teeth 211; one of the arc-shaped rack 210 and the movable gear 220 is connected to the sewing needle 100 in a driving connection, and the other of the arc-shaped rack 210 and the movable gear 220 is connected to the drive member 300 in a driving connection.

[0086] When the movable gear 220 is driven to rotate by the flexible shaft, the movable gear 220 can move continuously along the inner and outer rings of the arc-shaped rack 210, thereby producing an approximately arc-shaped reciprocating motion. The movable gear 220, through its approximately arc-shaped reciprocating motion, can drive the suture needle 100 to perform suturing. In addition, when the drive unit 300 drives the arc-shaped rack 210 to reciprocate along the arc-shaped track, external forces such as elasticity can be used to keep the movable gear 220 engaged with the continuous teeth 211, and make the movable gear 220 continuously cycle along the inner and outer rings of the arc-shaped rack 210 as the rack moves. In this way, reciprocating motion can be achieved through unidirectional drive, thereby achieving continuous drive of the suture needle 100.

[0087] See Figure 4 , Figure 14 and Figure 15 In an optional embodiment, the transmission member 200 is provided with a starting limit portion 204 and a ending limit portion 205, which are spaced apart along the circumference of the transmission member 200. When the driving member 300 drives the transmission member 200 to reciprocate by switching the direction of motion, the transmission member 200 is located between the starting limit portion 204 engaging with the starting position of the driving member 300 and the ending limit portion 205 engaging with the ending position of the driving member 300. When the driving member 300 drives the transmission member 200 until the termination limit part 205 engages with the driving member 300, the termination limit part 205 is blocked by the driving member 300, which can cause the driving member 300 to generate obvious motion resistance. At this time, the operator can know by touch that the transmission member 200 has reached the stroke limit position. Then, the driving member 300 is operated in the opposite direction until the transmission member 200 is reset to the starting limit part 204 engaging with the starting position of the driving member 300. This can be repeated to achieve the driving and stroke limit of the reciprocating rotation of the transmission member 200.

[0088] It is important to emphasize that this technology has requirements regarding spatial location and functional compatibility, which leads to significantly different technical effects overall. It solves complex and diverse problems in minimally invasive surgery, including issues related to structural simplicity and reliability, operating space and field of vision, operational safety, and application scope. In addition to the structural advantages mentioned above, the axial depth of channel 201 can be adjusted according to the needs of different endoscopic minimally invasive surgeries. For example, to accommodate more tissue and increase the height of gastrointestinal tissue folds, the outer shell 400 can be axially lengthened to pull more tissue into channel 201 without altering the structural design and stability. See also Figure 17 The tissue 900 to be sutured can be grasped with medical forceps and pulled into the working space of the suture needle 100 so that the needle can perform the suturing operation. The suturing method using medical forceps allows for precise positioning of the tissue 900 to be sutured. Furthermore, the forceps can be used to grasp and pull the tissue 900 to adjust the suture depth or the height of the gastrointestinal fold. See also... Figure 18 When the suture device is advanced, the tissue to be sutured 900 can be inserted into the working space of the C-shaped opening of the suture needle 100. No additional medical forceps are needed to assist the operation, and the suturing of the tissue to be sutured 900 can be achieved in the same way, making the suturing operation more efficient.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A suture device, characterized in that, include: A suture needle (100), a transmission component (200), and a drive component (300); the suture needle (100) is connected to the transmission component (200), and the drive component (300) is connected to the transmission component (200). The transmission element (200) at least partially encloses a channel (201) corresponding to the endoscope (800).

2. The suture device according to claim 1, characterized in that, The rotation axis of the transmission component (200) coincides with the rotation axis of the suture needle (100).

3. The suture device according to claim 1, characterized in that, The channel (201) extends axially from the inside of the transmission member (200) along the rotation axis of the transmission member (200) and passes through the area enclosed by the movement trajectory of the suture needle (100).

4. The suture device according to claim 1, characterized in that, The suture needle (100) is intermittently and unidirectionally connected to the transmission component (200).

5. The suture device according to claim 1, characterized in that, The rotation axis of the transmission component (200) is parallel to the axis of the endoscope (800) and the distance between them is 0 to 5 mm.

6. The suture device according to claim 1, characterized in that, The drive member (300) drives the transmission member (200) by rotational motion.

7. The suture device according to claim 6, characterized in that, The driving component (300) includes: a flexible shaft (310) and a driving gear (320); The drive gear (320) engages with the transmission member (200) for transmission, the distal end of the flexible shaft (310) is connected to the drive gear (320), and the flexible shaft (310) extends proximally along the endoscope (800).

8. The suture device according to claim 1, characterized in that, The transmission component (200) is rotatably mounted inside the housing (400).

9. The suture device according to claim 8, characterized in that, The outer casing (400) is provided with a side window (401); The side window (401) includes: a wound tissue receiving opening traversed by the movement trajectory of the suture needle (100), and a field of view opening toward the transmission member (200).

10. The suture device according to claim 8, characterized in that, The outer casing (400) is provided with a groove (402), and the suture needle (100) slides in the groove (402); The outer shell (400) is movably connected to a needle cap (700), and the suture needle (100) is located between the outer shell (400) and the needle cap (700).

11. The suture device according to claim 8, 9, or 10, characterized in that, The outer casing (400) is provided with a travel limiting part corresponding to the transmission member (200), and the transmission member (200) rotates relative to the outer casing (400) within the limiting range of the travel limiting part.

12. The suture device according to claim 8, characterized in that, A support member (500) is installed inside the outer casing (400), and a transmission member (200) is installed between the support member (500) and the outer casing (400).

13. The suture device according to claim 12, characterized in that, The support member (500) is provided with an annular groove (501), and the transmission member (200) is installed in the annular groove (501).

14. The suture device according to claim 1, characterized in that, The transmission component (200) is provided with an elastic locking part (203), which abuts against the suture needle (100).

15. The suture device according to claim 14, characterized in that, The suture needle (100) is provided with a locking position (101) that is adapted to the elastic locking part (203); When the transmission member (200) rotates in the first direction, the elastic locking part (203) engages with the locking position (101) and drives the tip of the suture needle (100) to move in the first direction.

16. The suture device according to claim 15, characterized in that, The suture needle (100) is provided with a bevel (102) extending from the locking position (101) in a second direction opposite to the first direction; When the transmission member (200) rotates in the second direction, the elastic locking part (203) slides away from the locking position (101) along the inclined surface (102).

17. The suture device according to claim 15 or 16, characterized in that, The suture needle (100) is provided with a one-way limiting part (103); The suture device also includes a backstop spring (600) adapted to the one-way limiting part (103), the backstop spring (600) being inclined toward the suture needle (100) in a first direction; When the tip of the suture needle (100) moves in the first direction, the suture needle (100) slides relative to the anti-recoil spring (600); When the transmission member (200) rotates in a second direction away from the first direction, the anti-reverse spring (600) abuts against the one-way limiting part (103) to prevent the suture needle (100) from rotating in the second direction.

18. The suture device according to claim 1, characterized in that, The drive component (300) includes: a first rack (330), a second rack (340), and a drive wheel assembly (350); The drive wheel assembly (350) is connected to the transmission component (200) in a transmission connection; The first rack (330) and the second rack (340) are spaced apart, and the drive wheel assembly (350) is fitted between the first rack (330) and the second rack (340).

19. The suture device according to claim 1, characterized in that, The transmission component (200) includes: an arc-shaped rack (210) and a movable gear (220); The arc-shaped rack (210) has a continuous tooth section (211) extending from the inner ring to the outer ring, and the movable gear (220) meshes with the continuous tooth section (211); One of the arc-shaped rack (210) and the movable gear (220) is connected to the suture needle (100) in a driving connection, and the other of the arc-shaped rack (210) and the movable gear (220) is connected to the drive member (300) in a driving connection.

20. The suture device according to claim 1, characterized in that, The transmission member (200) is provided with a starting limiting part (204) and a ending limiting part (205), and the starting limiting part (204) and the ending limiting part (205) are arranged at intervals along the circumference of the transmission member (200); When the driving member (300) drives the transmission member (200) to reciprocate by switching the direction of motion, the transmission member (200) is located between the starting limit part (204) engaged with the starting position of the driving member (300) and the ending limit part (205) engaged with the ending position of the driving member (300).

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