WO2023173694A1

WO2023173694A1 - Insertion-type tissue clipping device and clamping member thereof

Info

Publication number: WO2023173694A1
Application number: PCT/CN2022/116303
Authority: WO
Inventors: 黄俊俊; 单剑; 吴海良; 陈卿业; 孙忠利
Original assignee: 宁波新跃医疗科技股份有限公司
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-09-21
Also published as: CN117098503A

Abstract

An insertion-type tissue clipping device and a clamping member (1) thereof. The clamping member (1) comprises at least two clamping arms (100), wherein each clamping arm (100) comprises a clamping head (110) and a bendable portion (120); the clamping head (110) is used for clamping target tissue; the clamping head (110) and the bendable portion (120) remain relatively fixed to each other; the bendable portion (120) is provided with a bending structure capable of bending towards the closing direction of the clamping arms (100) and/or towards the opening direction of the clamping arms (100); in addition, the bending structure is provided with at least one deformation portion (123) arranged in a longitudinal direction; and when the clamping arms (100) are in a clamping state, the deformation portion (123) can be pressed inwards and deform in the longitudinal direction under the action of an external force, so as to drive the clamping arms (100) to integrally move towards a rear end of the clamping member (1), thereby solving the problem of the clamping member (1) being unable to move to a locking position when clamping certain larger target tissue.

Description

Insertable tissue clamping device and clamping parts thereof

Technical field

The present application relates to the field of medical devices, and specifically to the structure of an insertable tissue clamping device for surgery.

Background technique

An insertable tissue clamping device is an inserted medical device used to clamp tissues in the human or animal body to stop bleeding or close the device. It includes hemostatic clips, tissue clips, etc.

For example, during the minimally invasive treatment of gastrointestinal diseases, the tissue clamping device is usually inserted through the instrument channel of the endoscope to achieve the purpose of treatment. For example, hemostatic clips (or tissue clips) have been widely used to stop bleeding or close the site of gastrointestinal bleeding or trauma.

Existing clamping instruments have complex structures and large sizes. For example, take a clamping device such as a hemostatic clip (or tissue clip). A type of hemostatic clip mainly achieves opening and clamping through the cooperation of the clamping arm and the sleeve. Specifically, the left and right clamping arms pass through A pin is loosely assembled and the clamping arm can be retracted into a sleeve to achieve closure. The clamping arms can also extend from the sleeve to allow for expansion. This structure utilizes the axial space of the sleeve to close the clamping arm, so part of the clamping arm must be contracted in the sleeve. As a result, after the hemostatic clamp is separated, the overall length remaining in the patient's body is longer, making it easier to remove the clamping arm. causing injury and discomfort to the patient.

In another type of hemostatic clip (or tissue clip), the clamping arm is mainly connected through a rotating shaft, and then there is a track that slides up and down in the sleeve, and the shaft can slide along the track. There is also a fixed shaft at the upper end of the sleeve, and a strip-shaped hole is opened on the clamping arm. The fixed shaft passes through the strip-shaped hole of the clamping arm at the same time. By pushing and pulling the sliding shaft, the two clamping arms are driven to move up and down. After being hindered by the fixed shaft, the clamping arms are forced to move along the path of the elongated hole, thereby achieving opening and closing. This structure improves the control accuracy and the size of the clip becomes smaller, but there are more parts, the structure will become complex, and the cost will be higher.

technical problem

The present application provides a clamping member of an insertable tissue clamping device to demonstrate a clamping member with a simpler structure.

The present application provides an insertable tissue clamping device, which adopts the above-mentioned clamping member.

Technical solutions

Based on the above objectives, one embodiment of the present application provides a clamping member of an insertable tissue clamping device, which includes at least two clamping arms. The clamping arms include a clamping head and a bendable portion. The holding head is used to clamp the target tissue, and the holding head and the bendable part are kept relatively fixed. The bendable part has a function that can bend in the closing direction of the clamping arm and/or towards the clamping arm. The curved structure bends in the opening direction of the holding arm;

The bending structure has at least one deformation portion arranged longitudinally. When the clamping arm is in the clamping state, the deformation portion can be extruded and deformed inward to drive the entire clamping arm toward the clamping member. Backend moves.

In one embodiment, the deformation portion has a front arch portion protruding toward the front end of the deformation portion and/or a rear arch portion protruding toward the rear end of the deformation portion, and the front arch portion and/or the The rear arch can be deformed inwardly when subjected to external forces.

In one embodiment, the curved structure includes a plurality of first contraction seam groups and a second contraction seam group, each of the first contraction seam groups has at least one first contraction seam, and each of the second contraction seam groups has at least one first contraction seam group. The group has at least one second contraction seam, and the first contraction seam and the second contraction seam extend along the circumferential direction of the bendable portion; the first contraction seam group and the second contraction seam group extend along the The clamping arms are longitudinally spaced and staggered; the overlapping area between the first contraction seam and the second contraction seam forms a torsion deformation section, so that the bendable portion can bend and twist deformation.

In one embodiment, the first contraction seam group and the second contraction seam group are provided on the front side of the deformation part, and the twist deformation section is connected to the front part of the deformation part.

In one embodiment, the clamping head and the bendable part are an integral structure cut on the same base material through a laser cutting process.

In one embodiment, the clamping arm includes a pair of support arms, the support arm is located between the two clamping arms, and there is a gap between the deformation part and the support arm to allow the The outer periphery of the deformation part forms a shelter area.

In one embodiment, the clamping arm and the supporting arm are an integral structure cut on the same base material through a laser cutting process.

In one embodiment, the clamping part has a locking fitting part, and the locking fitting part is used to lock with the moving part to prevent the clamping arm from opening.

In one embodiment, the clamping arm includes a support arm, the support arm is located between the two clamping arms, and the locking fitting portion extends inward from a partial area of the support arm. Elastic buckle formed.

Based on the above objectives, one embodiment of the present application provides an insertable tissue clamping device, including:

A clamping member as described in any of the above;

And a motion control component, the motion control component includes a moving part, the moving part is disposed in the clamping part in a manner that can move axially along the clamping part, the moving part and the clamping arm Connected to drive the clamping arms open and closed.

beneficial effects

According to the clamping member of the above embodiment, the clamping member includes at least two clamping arms, and the clamping arms include a clamping head and a bendable portion. The clamping head is used to clamp the target tissue, and the clamping head and the bendable part are kept relatively fixed. The bendable part has a shape that can bend in the closing direction of the clamping arm and/or bend in the opening direction of the clamping arm. Curved structure. In this structure, the sleeve in the existing structure is omitted, and the entire tissue clamping device has fewer parts, a simpler structure, and lower assembly requirements. Moreover, the curved structure has at least one deformation portion arranged longitudinally. When the clamping arm is in the clamping state, the deformation portion can be extruded and deformed longitudinally inward under the action of external force to drive the entire clamping arm toward the clamping member. The rear end moves, thereby solving the problem that the clamping member cannot move to the locking position when clamping some larger target tissues.

Description of the drawings

Figure 1 is a schematic structural diagram of an insertion-type tissue clamping device in an embodiment of the present application, in which the transmission component is omitted;

Figure 2 is a schematic structural diagram of the clamping arm in an open state in an embodiment of the present application;

Figures 3 and 4 are cross-sectional views of the clamping member in an open state in an embodiment of the present application. At this time, the transmission member is in the first stroke, and the movement direction of the transmission member is as shown by the arrow;

Figure 5 is a schematic structural diagram of the clamping arm in a clamping state according to an embodiment of the present application;

Figures 6 and 7 are cross-sectional views of the clamping member in the clamping state in an embodiment of the present application. At this time, the transmission member is in the second stroke, and the movement direction of the transmission member is as shown by the arrow;

Figure 8 is an exploded schematic diagram of each part of the front end in an embodiment of the present application;

Figure 9 is a schematic diagram of the matching structure of the connecting arm and the limiting member in an embodiment of the present application;

Figure 10 is a schematic diagram of the matching structure of the limiting member and the supporting arm in an embodiment of the present application;

Figure 11 is an exploded schematic diagram of the matching structure of the connecting arm and the moving part in one embodiment of the present application;

Figure 12 is a schematic structural diagram of a connecting arm in an embodiment of the present application;

Figure 13 is a structural schematic diagram of an embodiment of the present application when the clamping arm is in a clamping and self-locking state. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow;

Figures 14 and 15 are cross-sectional views of the clamping arm in a clamping and self-locking state according to an embodiment of the present application;

Figure 16 is a schematic structural diagram of the clamping arm in a clamping and locked state in an embodiment of the present application;

Figures 17 and 18 are cross-sectional views of the clamping arm in an embodiment of the present application when it is in a clamped and locked state. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow;

Figure 19 is a schematic view of the cylindrical clamping member expanded longitudinally in an embodiment of the present application;

Figure 20 is a schematic structural diagram of the annular deformation portion in its natural state in an embodiment of the present application;

Figure 21 is a schematic structural diagram of an annular deformation portion after inward extrusion and deformation in an embodiment of the present application;

Figure 22 is a schematic diagram of the deformation direction of the deformation part when the clamping member clamps thicker tissue in an embodiment of the present application. The deformation direction is shown by the arrow;

Figure 23 is a schematic diagram of the length of the limiting member from the locking groove when the clamping member clamps thicker tissue in another embodiment of the present application;

Figure 24 is a schematic structural diagram of the natural state when there are two deformation parts in an embodiment of the present application;

Figure 25 is a schematic structural diagram after inward extrusion and deformation when there are two deformation parts in an embodiment of the present application;

Figure 26 is a schematic structural diagram of an embodiment of the present application with multiple deformation portions;

Figure 27 is a schematic structural diagram of the clamping arm in the clamping state and the moving part and the transmission part separated in an embodiment of the present application;

Figure 28 is a cross-sectional view of an embodiment of the present application in which the clamping arm is in the clamping state and the moving part and the transmission part are separated. At this time, the transmission part is in the third stroke, and the movement direction of the transmission part is as shown by the arrow;

Figure 29 is a schematic cross-sectional view of the separation process of the moving parts and the transmission parts in one embodiment of the present application;

Figures 30 and 31 are structural schematic diagrams of an embodiment of the present application in which the clamping arm is in a clamping state and the base is separated from the clamping arm and the support arm is separated;

Figure 32 is a cross-sectional view of the clamping arm in the clamping state and the separation base from the clamping arm and the support arm in an embodiment of the present application. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow. shown.

Embodiments of the invention

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments use associated similar element numbers. In the following embodiments, many details are described in order to make the present application better understood. However, those skilled in the art can readily recognize that some of the features may be omitted in different situations, or may be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is difficult to describe these in detail. The relevant operations are not necessary, and they can fully understand the relevant operations based on the descriptions in the instructions and general technical knowledge in the field.

Additionally, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. At the same time, each step or action in the method description can also be sequentially exchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the description and drawings are only for clearly describing a certain embodiment, and do not imply a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "connection" mentioned in this application include direct and indirect connections (connections) unless otherwise specified.

This embodiment provides an insertable tissue clamping device (hereinafter referred to as a clamping device for convenience of description). The clamping device is used to clamp tissues (collectively referred to as target tissues) in humans or animals to stop bleeding. Or closing function, which may include but is not limited to hemostatic clips, tissue clips, etc. The clamping device can be a disposable instrument or a reusable instrument.

Please refer to Figures 1-7. In one embodiment, the clamping device includes a clamping member 1, a control handle 3, a motion control component 4, a transmission component 5 and other related components.

The control handle 3 is an operating component that controls the clamping device. The operator can manually operate the opening and closing of the clamping member 1 through the control handle 3 to clamp the target tissue 2 . Among them, for the convenience of description, this application defines the end of the entire clamping device where the clamping member 1 is located as the front end, and the end where the control handle 3 is located as the rear end. The front and rear directions of other components are based on this direction.

The clamping member includes at least two clamping arms. The clamping arm 100 includes a clamping head 110 and a bendable portion 120 . The clamping head 110 is used to clamp the target tissue 2 . The clamping head 110 and the bendable portion 120 remain relatively fixed. This relative fixation can be achieved through an integrally formed structure (the embodiment shown in Figure 2-7), or can be connected into one body through clamping, welding, bonding, screw locking, riveting and other fixing methods.

In order to better clamp the target tissue 2, in some embodiments, the clamping arms 100 are arranged in a jaw-like structure to clamp the target object. The jaw-type structure is a structure that can firmly grasp the target object. For example, in the embodiment shown in FIGS. 2-7, when there are two sets of clamping arms 100, the two clamping arms 100 are arranged oppositely. When closed as shown in 5-7 (in the clamping state at this time), the target object can be grasped. In other embodiments, when the number of clamping arms 100 is different, they may have different jaw structures. For example, when there are three clamping arms 100 , the three clamping arms 100 may be arranged in a triangle. , to grab the target object.

Different from the prior art in which the clamping arm 100 is opened and closed by limiting the position of the clamping arm 100 with a sleeve, in this embodiment, the opening and closing of the clamping arm 100 mainly relies on the bending structure of the bendable portion 120 Deformation. The bendable portion 120 has a structure capable of bending in the closing direction of the clamping member 1 and/or bending in the opening direction of the clamping member 1 . Please refer to Figures 5-7. In the illustrated embodiment, the initial state of the clamping member 1 is the clamping state, that is, the clamping member 1 is in the clamping state when the bending portion 120 does not deform. At this time, the bendable portion 120 at least has a structure that can be bent in the opening direction of the clamping member 1, so as to realize the opening of the clamping member 1 as shown in FIGS. 2-4.

The clamping head 110 is a hard segment, which is not easily deformed relative to the bendable portion 120 . During the movement of the moving member 410 to the front end and the rear end, the bendable portion 120 bends and deforms before the clamping head 110 to ensure that the clamping arm 100 provides a better bite effect to the target object. The bending deformation of the bendable portion 120 is achieved through structural deformation. For example, it can be achieved by providing a bending structure capable of torsional deformation on the bendable portion 120 , or by changing the material thickness of the bendable portion 120 , or by selecting It is realized by using materials that are more easily deformed. Of course, it can also be realized by other structures. The bending deformation of the bendable portion 120 is reversible, that is, the bending portion 120 has elasticity and can rebound and reset when the external force is lost, so the bending deformation can be repeated.

In this structure, the sleeve in the existing structure is omitted, and combined with the deformation state of the bendable portion 120, the clamping member 1 can open and close based on the position change of the moving member 410. Under the same opening width requirement, the length of the clamping member 1 is shorter than the combination of the clamping arm and the sleeve in the prior art. After adopting the clamping member 1, the entire tissue clamping device has fewer parts, a simpler structure, lower assembly requirements, and the cost is greatly reduced.

The function of the motion control component 4 is to drive the clamping arm 100 to move in the opening direction and the closing direction. Please refer to FIGS. 2-7 and 11-12 , the motion control component 4 includes a moving part 410 . The moving member 410 is disposed in the clamping member 1 in a manner that can move along the axial direction of the clamping member 1 . The moving part 410 is directly or indirectly connected to the clamping arm 100 to form a linkage structure.

Please refer to FIGS. 2-7 and 11-12 . In one embodiment, the motion control assembly 4 includes at least two connecting arms 420 . The two connecting arms 420 are distributed in a cross shape, one end of the two connecting arms 420 is hinged on the moving part 410, and the other end is connected to a clamping arm 100, for example, through laser or other forms of clamping, welding, and bonding. , screw locking, riveting and other fixed methods of connection. For example, please refer to Figures 2-8. In one embodiment, the front end of the connecting arm 420 has a raised connecting portion 421. The raised connecting portion 421 is inserted into the corresponding clamping arm 100 and is fixedly connected to the clamping arm 100. , for example by ultrasonic welding.

In addition, in other embodiments, the moving part 410 can also be formed into an integrated structure with the connecting arm 420. In this case, the connecting arm 420 is only a part of the moving part 410. When the moving part 410 moves, the connecting arm 420 can generate Elastic deformation to adapt to the opening and closing needs of the clamping arm 100.

Of course, in other embodiments, the moving part 410 can also form the motion control assembly 4 with the connecting arm 420 in other ways. For example, the connecting arm 420 is hinged on the moving part 410 but does not form a cross structure.

When the moving member 410 moves toward the front end of the clamping device, the two clamping arms 100 can be spread apart through the connecting arm 420, so that the clamping arms 100 are in an open state. When the moving member 410 moves toward the rear end of the clamping device, the two clamping arms 100 can be pulled close to each other through the connecting arm 420, so that the clamping arms 100 move to a closed state and are in a clamping state.

The transmission assembly 5 includes a transmission member 510 and a sleeve assembly 520 . The transmission member 510 is connected to the moving member 410 , and the separation base 200 is connected to the sleeve assembly 520 , so that the entire clamping member 1 is supported on the sleeve assembly 520 . The sleeve assembly 520 is connected to the control handle 3 , and the control handle 3 forms a linkage structure with the transmission member 510 to control the movement of the transmission member 510 and the moving member 410 .

Please refer to FIG. 1 . In one embodiment, the control handle 3 may include a control part 31 for controlling the transmission member 510 and a gripping part 32 for the operator to grasp. The control part 31 may move relative to the gripping part 32 . In FIG. 1 , the gripping part 32 is a structure for the operator's thumb to be inserted into, and the control part 31 can move forward and backward relative to the gripping part 32 . The control part 31 can be connected to the transmission part 510 through a traction part to form a linkage structure. The traction component may be, but is not limited to, a steel wire rope or a traction rope made of other materials, as well as other components that can be used as the traction structure of the clamping device. Through the traction member, the operator can drive the transmission member 510 and the moving member 410 to move through the control part 32, thereby controlling the opening and closing of the clamping arm 100.

Among them, different movement strokes of the transmission member 510 correspond to different states of the clamping device. Specifically, the transmission member 510 has a first stroke, a second stroke and a third stroke. In the first stroke, the transmission member 510 drives the clamping heads 110 away from each other, causing the clamping arms 100 to move to the open state, as shown in Figure 2-4; in the second stroke, the transmission member 510 drives the clamping heads 110 approaching each other, the clamping arm 100 moves to the clamping state to clamp the target tissue 2, as shown in Figure 5-7; during the third stroke, the clamping arm 100 is locked in the clamping state, and the clamping arm 100 moves from The transmission member 510 and the separation base 200 are separated, as shown in Figures 13-18 and 27-32. When the clamping arm 100 is completely separated from the transmission member 510 and the separation base 200, the clamping arm 100 can remain in the patient's body, and the part separated from the clamping arm 100 can be removed from the patient's body. The above process is a rough introduction to the entire use process of the clamping device.

Further, the clamp 1 further includes a separation base 200 connected to the clamp arm 100 . This kind of connection can be a one-piece structure (as shown in the embodiment shown in Figure 2-7). The one-piece structure can be that the target object is made of the same material and is not assembled by a combination of two or more parts. The one-piece molded structure (including other one-piece molded structures described below) can be made by, but not limited to, injection molding, laser cutting, and other machining processes. In particular, when laser cutting is used, extremely small gaps can be processed, which is conducive to miniaturization of the overall structure and improvement of compactness. In addition, the clamping arm 100 and the separation base 200 can also be integrated with the clamping head and the bendable portion through fastening methods such as clamping, welding, bonding, screw locking, riveting, etc.

When the clamping arm 100 clamps the target tissue 2, the target tissue 2 exerts a reaction force on the clamping arm 100. Therefore, in order to firmly clamp the target tissue 2, it is necessary to ensure that the clamping device can provide sufficient power to the clamping arm 100. bite force. To address this problem, please refer to Figures 2-10. In some embodiments, the clamp 1 also includes a pair of support arms 300 located between the two clamp arms 100. The support arms 300 are connected to the clamp arms 100 and Separate base 200 connection. This kind of connection can be realized through an integrally formed structure (the embodiment shown in Figure 2-7), or it can be connected into one body through clamping, welding, bonding, screw locking, riveting and other fixing methods. The pair of support arms 300 is provided with a limiting member 310 . As shown in FIG. 4 , the limiting member 310 is located in the intersection area 421 formed by the two connecting arms 420 and close to the moving member 410 . Please refer to Figures 2-7. When the moving member 410 moves to the rear end, the limiting member 310 can contact at least one connecting arm 420 at least when the clamping arm 100 is in the clamping state, and form a lever structure for the at least one connecting arm 420. fulcrum.

In the embodiment shown in FIGS. 2-8 , the connecting arm 420 not only serves as a key component connecting the clamping arm 100 and the moving member 410 , but also serves as a component that cooperates with the limiting member 310 to implement the lever structure. To satisfy the above two functions, the outer edge of the connecting arm 420 facing the limiting member 310 needs to be able to generate force with the limiting member 310 . Because the front end of the connecting arm 420 is fixedly connected (such as welding) to the middle part of the clamping arm 100, the clamping arm 100 and the connecting arm 420 can be regarded as the same force system, and the stopper 310 can be used as a lever for the clamping arm 100. Pivot of rotation. During the movement of the moving part 410 to the rear end, the displacement of the moving part 410 to the rear end is converted into the closing of the clamping arm 100. At this time, the outer edge of the connecting arm 420 close to the limiting member 310 is connected with the limiting member 310. There are both relative sliding displacement and relative rotational displacement. The pulling force from the control handle 3 is converted into a downward force of the connecting arm 420 relative to the limiting member 310. Through the action of the limiting member 310 as a lever fulcrum, the force can be effectively transmitted to the other end of the connecting arm 420, and then to the other end of the connecting arm 420. The front end of the clamping arm 100 is clamped to obtain greater clamping force (biting force).

In order to ensure that at least when the clamping arm 100 is in the clamping state, the lever structure formed by the limiting member 310 and the connecting arm 420 is a labor-saving lever. Therefore, in one embodiment, please refer to FIG. 7 . When 100 is in the clamping state, the force arm b between the rotation center of the connecting arm 420 relative to the moving member 410 and the center of the limiting member 310 is greater than the force arm c between the connecting center of the connecting arm 420 and the clamping head 110 and the center of the limiting member 310 . . In this way, when the clamping arm 100 is in the clamping state, the operator can use a more labor-saving manner to obtain a greater bite force on the clamping arm 100 .

Of course, in other embodiments, at least when the clamping arm 100 is in the clamping state, the force arm b between the rotation center of the connecting arm 420 relative to the moving member 410 and the center of the limiting member 310 may also be equal to or smaller than the connecting arm 420 and the center of the limiting member 310 . The connection center of the clamping head 110 is distanced from the center of the limiting member 310 by a moment arm c. At this time, the lever is mainly used to change the direction of the force, making it easier for the operator to make the clamping arm 100 better engage the target tissue 2 by pulling the transmission member 510 .

Furthermore, when the clamping arm 100 engages the target tissue 2, in order to avoid the reaction force of the target tissue 2 from spreading the clamping arm 100, in one embodiment, the limiting member 310 and the connecting arm 420 can also be combined. Form a self-locking structure. Please refer to Figures 12 and 15. In one embodiment, the two connecting arms 420 have locking mating surfaces 422. When the clamping arm 100 is in the clamping state, the locking mating surfaces 422 of the two connecting arms 420 form a lock. The stop groove 423 and the limiting member 310 are located in the locking groove 423 to prevent the two clamping arms 100 from lateral cross movement and keep the clamping arms 100 in the clamping state.

The realization principle of this self-locking is that when the clamping arm 100 is in the clamping state, the reaction force of the target tissue 2 to open the clamping arm 100 passes through the connecting arm 420 and is converted into the lateral direction of the connecting arm 420 relative to the limiting member 310 Displacement, the force acting on the front end of the moving part 410 becomes very small. At this time, the limiting part 310 is located in the locking groove 423, which can prevent the connecting arm 420 from moving crosswise, and then the tissue clamping arm 100 is opened.

In one embodiment, the lateral size of the locking groove 423 is slightly larger than or equal to the lateral size of the limiting member 310 , which can not only ensure that the limiting member 310 can enter the locking groove 423 , but also avoid the locking groove 423 Too much gap between the clamping arm 100 and the limiting member 310 will cause the clamping arm 100 to move larger laterally, preventing the clamping arm 100 from loosening the target tissue 2 .

During the movement of the connecting arm 420 to the rear end, the limiting member 310 remains basically stationary. Therefore, in order to guide the locking groove 423 to be clamped on the limiting member 310, in some embodiments, a guide structure may also be provided. Please refer to Figures 7, 12 and 15. In one embodiment, the two connecting arms 420 have guide surfaces 424. When the clamping arm 100 moves from the open state to the clamping state, as the movement of the connecting arms 420 changes, The guide surface 424 encloses a guide space 425. The limiting member 310 is disposed in the guide space 425 , and the guide space 425 is connected with the locking groove 423 . When the connecting arm 420 moves to the rear end and drives the clamping arm 100 to move to the clamping state, the guide space 425 guides the locking groove 423 to get stuck on the limiting member 310 .

As shown in Figures 7 and 15, in one embodiment, the locking groove 423 is connected to the front side of the guide space 425, and the lateral size of the guide space 425 gradually decreases from the back to the front.

In order to form the guide structure as shown in Figures 7 and 15, in one embodiment, please refer to Figures 7, 12 and 15, the connecting arm 420 has an inclined guide surface 424, and the two inclined guide surfaces 424 can be at When the clamping arm 100 moves from the open state to the clamping state, it cooperates to form a figure-eight-shaped guide space 425. When the contact point of the connecting arm 420 and the limiting member 310 passes the turning point of the guide surface 424 of the connecting arm 420, it will enter the locking groove 423. At this time, the clamping arm 100 and the limiting member 310 are interlocked.

Of course, in other embodiments, the guide surface 424 can also be in other shapes, thereby forming guide spaces 425 in other shapes.

In order to form the self-locking structure as shown in Figures 7 and 15, in one embodiment, please refer to Figures 7, 12 and 15, the connecting arm 420 has an arc-shaped locking mating surface 422. The locking mating surface 422 is located on the front side of the guide surface 424 . When the clamping arm 100 is in the clamping state, the locking mating surfaces 422 of the two connecting arms 420 enclose an arc-shaped locking groove 423. When the limiting member 310 is a cylindrical structure (such as a limiting shaft), the arc-shaped locking groove 423 can fit more closely with the limiting member 310 .

Please refer to Figures 12 and 15. In one embodiment, the locking mating surface 422 also has a straight line segment 426. When the clamping arm 100 is in the clamping state, the straight line segments 426 of the two locking mating surfaces 422 can cooperate to form The vertical inlet and outlet of the locking groove 423 extends in the same direction as the axial direction of the moving part 410 . This vertical inlet and outlet can make it more difficult for the limiting member 310 to slide out of the locking groove 423 .

Of course, in some other embodiments, the vertical inlet and outlet can also be replaced by a figure-eight inlet and outlet with a large inside and a small outside or other forms of inlets and outlets, so that it is more difficult to enter the limiting member 310 of the locking groove 423 from the The figure-eight entrance and exit slide out.

Further, when the moving member 410 moves toward the front end of the clamping device, the connecting arm 420 can be driven to open the support arm 300, thereby switching the support arm 300 to an open state. In order to limit the opening angle of the support arm 300, an angle limiting structure may be provided on the support arm 300, or an angle limiting structure may be provided on the moving part 410 and/or the connecting arm 420.

For example, please refer to Figures 8 and 11. In one embodiment, the front end of the moving member 410 has an angle limiting structure 414. When the clamping arm 100 is in an open state, the angle limiting structure 414 is on the limiting member 310. A limit is formed on the rear side to prevent the moving member 410 from continuing to move toward the front end and limit the opening angle of the clamping arm 100 .

In one embodiment, the angle limiting structure 414 is a limiting groove provided on a side of the front end of the moving part 410 away from the corresponding clamping arm 100. For example, the first base body 411 and the second base body 412 both have the limiting groove. bit slot. The limit groove serves as the angle limit structure 414. When the clamping arm 100 is in the open state, the bottom of the limit groove can contact the limit member 310, thereby forming a limit to prevent the moving member 410 from continuing to move to the front end. The opening angle of the clamping arm 100 is limited.

In another embodiment, the angle limiting structure can also be formed by the rocker arm 420 . Please refer to FIGS. 2-4 and 12 . In one embodiment, one end of the two rocker arms 420 connected to the moving member 410 has a protruding limiting portion 427 . When the clamping arm 100 is in the open state, the two limiting portions 427 form an angle limiting structure, for example, in a cross shape or just aligned left and right. The angle limiting structure forms a limit on the rear side of the limiting member 310 to prevent the moving member 410 from continuing to move toward the front end, thereby limiting the opening angle of the clamping arm 100 . After the limiting portion 427 is provided, no additional angle limiting structure can be provided. The limiting portion 427 is directly provided on the rocker arm 420 and can be manufactured in one piece. The structure is simple and the structure of the entire clamping device can also be simplified.

In one embodiment, the connecting arm 420 may be integrally formed, for example, using sheet metal through laser cutting or stamping. In one embodiment, when sheet metal material is used, the thickness of the connecting arm 420 can be selected to be between 0.3-0.6 mm, so as to ensure the strength of the connecting arm 420 and avoid the excessive weight of the connecting arm 420. In addition, the connecting arm 420 can also be made of multiple components separately and then fixedly connected together.

Furthermore, considering that in some cases, the relative position between the connecting arm 420 and the moving part 410 needs to be automatically adjusted, for example, during the opening and closing process of the clamping arm 100, due to the limitation of the internal space of the clamping part 1, it is necessary to The complex motion trajectory of the connecting arm 420 is realized in a small inner diameter space, so the connecting arm 420 inevitably interferes with the movement of the clamping member 1 during the movement. To address this problem, in one embodiment, one of the moving parts 410 and the connecting arm 420 has a rotating shaft and the other has a self-adjusting groove. The rotating shaft is provided in the self-adjusting groove. The rotating shaft and the self-adjusting groove can be in the connecting arm. During the movement of 420, the relative positions of the moving part 410 and the connecting arm 420 in the transverse direction are adaptively adjusted. The inner cavity of the self-adjusting groove is larger than the rotating shaft, so the rotating shaft can adaptively adjust its position in the self-adjusting groove.

Please refer to FIGS. 4 and 7 . In one embodiment, the self-adjusting groove 428 is provided on the connecting arm 420 , and the rotating shaft 4111 is fixedly provided on the moving part 410 . In the illustrated embodiment, the self-adjusting groove 428 is elongated, and the rotating shaft 4111 can move relatively in the elongated structure. When the clamping arm 100 is in the clamping state, as shown in FIG. 7 , the two self-adjusting grooves 428 are arranged oppositely, and the rear ends of the self-adjusting grooves 428 are tilted toward the space between the two connecting arms 420 to facilitate the connecting arms. The 420 can adjust its position laterally during movement.

Of course, in other embodiments, the self-adjusting groove 428 can also be provided on the moving part 410, and the rotating shaft 4111 is provided on the connecting arm 420. In some other embodiments, the self-adjusting groove 428 may also have other shapes, such as a circular or elliptical shape with an inner diameter larger than the outer diameter of the rotating shaft 4111 .

Please refer to FIGS. 4 and 7 . In one embodiment, the two connecting arms 420 are connected to the moving part 410 through respective rotation axes 4111 . The two connecting arms 420 are separated from and parallel to the rotation axes of the moving part 410 . In other embodiments, the two connecting arms 420 can also be connected to the moving part 410 through a common rotating shaft 4111.

Further, please refer to Figures 7 and 8. In order to avoid the influence of the connecting arm 420 when clamping the target tissue 2, in one embodiment, the front end of the connecting arm 420 has a recess 4210 on a side facing away from the corresponding clamping arm 100. , the recessed portion 4210 is used to avoid the tissue clamped by the clamping head 110 .

Further, please refer to Figure 10. In one embodiment, a pair of support arms 300 are disposed oppositely at the gap between the two clamping arms 100, and both ends of the limiter 310 are fixedly connected to one support arm 300 respectively. For example, laser or other forms of clamping, welding, bonding, screw locking, riveting or other fixing forms are used to form a stable limiting structure.

Please refer to Figures 8-10. In one embodiment, the limiting member 310 has two limiting blocks 311 arranged along its axial direction. A limiting space is formed between the two limiting blocks 311. The two connecting arms 420 are arranged along the axial direction of the limiting member 310. The axial layer of the limiting member 310 is stacked in the limiting space to prevent the two connecting arms 420 from disengaging along the axial direction of the limiting member 310, restricting the connecting arms 420 from sliding outward at both ends, and preventing the teeth of the clamping arm 100 from being unable to move. Accurate alignment.

In the embodiment shown in FIG. 10 , the limiting member 310 has a shaft-shaped structure, and the two limiting blocks 311 are distributed in a dumbbell shape on the limiting member 310 . Of course, the limiting member 310 may also have other structures in other embodiments.

Furthermore, the moving part 410 is capable of moving within the holding part 1 and driving the connecting arm 420 to move. The movement of the moving part 410 relative to the holding part 1 may be, but is not limited to, sliding, rolling, etc. The moving part 410 can adopt any shape and structure that meets the above requirements.

Please refer to FIGS. 8 , 9 and 11 . In one embodiment, the moving member 410 is a slider, and the moving member 410 is slidably disposed in the clamping member 1 . The moving part 410 includes a first base 411 and a second base 412. The connecting arm 420 is connected and limited between the first base 411 and the second base 412. The first base 411 and the second base 412 The moving parts 410 are formed by splicing. In this structure, the moving part 410 is divided into the first base 411 and the second base 412, and are manufactured separately, which can reduce manufacturing difficulty. In this assembled structure, the connecting arm 420 can be installed on the first base 411 first, and then the second base 412 can be fastened to the first base 411. This not only completes the assembly of the moving part 410, but also completes the connecting arm 420. installation.

Please refer to Figure 11. In one embodiment, the first base 411 has a rotating shaft 4111, and the connecting arm 420 is sleeved on the rotating shaft 4111. The second base body 412 can be buckled on the first base body 411. In order to buckle with the second base body 412, the first base body 411 is provided with protrusions 4112, and the second base body 412 is provided with a recessed portion 4121. , the protruding portion 4112 and the recessed portion 4121 are plug-fitted to form lateral positioning.

Of course, in other embodiments, the moving part 410 can also be of other structures, for example, it can be a one-piece structure or spliced from three or more sub-components, and the connecting arm 420 is installed on the moving part 410 in other ways. .

In some embodiments, the moving part 410 can be laser cut from a steel pipe or formed by powder metallurgy (assembly is simpler).

Further, in one embodiment, in order to prevent the moving member 410 from rotating in the clamping member 1, at least one support arm 300 has a limiting guide portion arranged along its longitudinal direction, and the moving member 410 has at least one limiting guide fitting portion, The limiting guide fitting part cooperates with the limiting guide part to limit the movement of the moving part 410 in the direction defined by the limiting guide part.

In one embodiment, one of the limiting guide part and the limiting guide matching part is a guide groove, and the other is a guide block provided with a protrusion, and the guide block extends into the guide groove. For example, please refer to FIGS. 6 and 8 . In one embodiment, the guide block 4113 is provided on the moving part 410 , specifically on the outer wall of the first base 411 . The guide groove 320 is provided on the support arm 300 corresponding to the first base 411 . Of course, when guidance is required on both sides, guide blocks 4113 can also be provided on the second base body 412, and guide grooves 320 can also be provided on the other support arm 300 corresponding to the second base body 412.

Furthermore, when the transmission member 510 moves along the second stroke, in addition to the above-mentioned limiting member 310 cooperating with the connecting arm 420 for self-locking, another locking structure can also be provided for locking to prevent the moving member 410 from returning and promote clamping. Arm 100 opens unexpectedly.

In one embodiment, the clamping part 1 has a locking fitting part, and the moving part 410 has a locking part. When the clamping arm 100 is in the clamping state, the locking fitting part and the locking part can move relative to the locking position. In this way, when the clamping arm 100 is separated from the transmission member 510, the locking portion and the locking matching portion can form a lock in time to prevent the moving member 410 and the connecting arm 420 from moving toward the front end of the clamping member 1 and prevent clamping. Arms 100 are opened.

Please refer to Figures 16-18. In one embodiment, the locking part is a clamping platform 4122 provided on the moving part 410, and the locking fitting part is an elastic buckle 330 extending inward. The elastic buckle 330 is provided on the path along which the clamping platform 4122 moves to the rear end. When the clamping arm 100 is in the clamping state, the clamping platform 4122 can move to the rear end and cross the position of the elastic buckle 330 . When the clamping arm 100 is separated from the transmission member 510, under the elastic restoring force of the clamping arm 100, the clamping platform 4122 can be reset to the front end along with the moving member 410 for a small distance. When the elastic buckle 330 abuts against the clamping platform 4122 When moving to the front side, the clamping platform 4122 will be prevented from continuing to move toward the front end of the clamping member 1, thus forming a lock.

Please refer to FIGS. 16-18 . In one embodiment, in order to better guide the elastic buckle 330 to move toward the clamping platform 4122 , the outer wall of the clamping platform 4122 may form an inclined surface 4122a extending along its longitudinal direction.

Please refer to FIGS. 16-18 . In one embodiment, the elastic buckle 330 is formed by extending inwardly from a partial area of the support arm 300 . The elastic buckle 330 and the support arm 300 are an integrally formed structure. This structure is simple to manufacture and can be formed in one piece, for example, by laser cutting without adding other parts. Moreover, the elastic buckle 330 can utilize the longitudinal space to make the elastic buckle 330 longer and have better elasticity while the clamping member 1 maintains the same length.

In some embodiments, both support arms 300 may be provided with elastic buckles 330 . When a certain support arm 300 is provided with the above-mentioned limiting guide, please refer to Figure 14. In one embodiment, one support arm 300 may have an elastic buckle 330, and the other support arm 300 may have a limiter provided along its longitudinal direction. The positioning guide portion (such as the guide groove 320 ) is used to limit the longitudinal movement of the moving member 410 along the clamping member 1 . In this embodiment, the locking conditions of the elastic buckle 330 are simpler and the locking is more reliable. If there are two elastic buckles 330, it not only takes up space, but also allows the two elastic buckles 330 to be accurately aligned with the clamping table 4122 and locked at the same time, which requires higher precision in the manufacturing and assembly of parts. At the same time, the limiting and guiding function of the limiting guide on the other side can make the elastic buckle 330 and the clamping platform 4122 of the moving part 410 have a smaller radial swing range, thereby ensuring a more stable locking.

At the same time, when there is a self-locking structure formed by the above-mentioned limiting member 310 and the connecting arm 420, the reaction force of the target tissue 2 to open the clamping arm 100 is converted into a relative limiting position of the connecting arm 420 through the connecting arm 420. The lateral displacement of the component 310 causes the force exerted on the front end of the moving component 410 to become very small. This also means that the elastic buckle 330 only needs to bear a small force to the front end to achieve the locking of the entire clip. Therefore, usually one The elastic buckle 330 can achieve locking.

Further, please refer to FIGS. 2-7 . In one embodiment, the bendable part 120 is a semi-cylindrical structure. When the clamping arm 100 is closed, the bendable part 120 can be enclosed into a cylindrical structure. The semi-cylindrical shape refers to a non-complete cylindrical shape, which does not have to be half of the cylindrical structure, and can also be one-third of the entire cylindrical structure or other sizes. In addition, in other embodiments, the bendable portion 120 can also be in other structures, such as sheet shape, etc., and is not limited to the semi-cylindrical structure.

Further, please refer to FIGS. 1-7 and 19 . In one embodiment, the bendable portion 120 includes a plurality of first contraction slit groups 121 and second contraction slit groups 122 . Each first contraction seam group 121 has at least one first contraction seam 1211 , and each second contraction seam group 122 has at least one second contraction seam 1221 . The first contraction seam 1211 and the second contraction seam 1221 are along the bendable portion 120 circumferential extension setting. The first contraction seam group 121 and the second contraction seam group 122 are spaced apart and staggered along the longitudinal direction of the clamping arm 100 , and a first contraction seam group 121 is spaced between the two second contraction seam groups 122 . Wherein, the overlapping area between the first shrinkage seam 1211 and the second shrinkage seam 1221 forms a twist deformation section 124, so that the bendable portion 120 can bend and twist deformation.

In one embodiment, as shown in FIGS. 5 and 19 , the clamping member 1 is maintained in the clamped state in the initial state, the first contraction seams 1211 are maintained in the initial state, and each part of the bendable portion 120 does not deform. As shown in Figures 2 and 19, when the clamping member 1 needs to be opened, the bendable portion 120 deforms outward, the first shrinkage seam 1211 and the second shrinkage seam 1221 shrink, and the twisted deformation section 124 undergoes bending and torsional deformation, thereby causing The outer sides of the bendable portion 120 (the side of the clamping arms 100 facing away from each other) contract, causing the entire clamping head 110 to expand.

In one embodiment, the first shrinkage seam group 121 and the second shrinkage seam group 122 can be integrally formed by laser cutting on the pipe or sheet. For example, laser cutting of pipes or sheets with a wall thickness of 2mm

19, in one embodiment, two second contraction seams 1221 are provided between the adjacent first contraction seam groups 121, and the two second contraction seams 1221 are provided on both sides of the bendable portion 120. And the second contraction seam 1221 extends outward to the corresponding side of the bendable portion 120 .

Among them, in the longitudinal direction of the bendable part 120, within the same distance, the more densely the twisted deformation segments 124 are distributed, the softer the bending deformation of the bendable part 120 becomes. At the same time, in order to take into account the strength of the bendable part 120, in one embodiment, the number of the first shrinkage seam groups 121 is 6-10, and the second shrinkage seam groups 122 are distributed at both ends of the bendable part 120. Therefore, The number of the second shrinkage seam group 122 is one more than that of the first shrinkage seam group 121, and the number ranges from 7 to 11. With this quantity, the bendable portion 120 can be easily bent and the strength can be ensured to prevent the bendable portion 120 from being too soft to support the clamping head 110 . When the operator opens and closes the clamping member 1 normally, only a small amount of force is needed to achieve opening and closing, and the hand feeling is good. As shown in FIG. 19 , in the embodiment shown in the figure, the number of the second shrinkage seam groups 122 is eight, and the number of the first shrinkage seam groups 121 is seven. By adjusting the circumferential length of the first shrinkage seam 1211 and the second shrinkage seam 1221 and the distance between them, the bending softness or supportability can also be changed, and the circumferential length and the distance can be flexibly set according to needs.

Please refer to Figure 19. In one embodiment, the first shrinkage slits 1211 are arranged in parallel, and the second shrinkage slits 1221 are arranged in parallel.

Of course, in addition to being parallel to each other, the first shrinkage slits 1211 and the second shrinkage slits 1221 can also be arranged in other non-parallel arrangements. By arranging the first shrinkage slits 1211 uniformly and parallelly along the circumferential direction of the bendable portion 120, the bending deformation directions of the first shrinkage slits 1211 can be unified, making the bending deformation of the clamping member 1 smoother and more stable.

Further, in one embodiment, the first contraction seam 1211 has a gap in the longitudinal direction of the bendable portion 120 . Please refer to FIG. 19 . The first contraction seam 1211 is in the shape of a long groove, and the middle part of the first contraction seam 1211 has two relatively convex arc-shaped edges. When the clamp 1 is opened to the limited position, the arcuate edges will contact each other, thereby determining the maximum opening angle.

In the embodiment shown in FIG. 19 , the second contraction seam 1221 is arranged in a straight line in the circumferential direction. In other embodiments, the second contraction seam 1221 can also be provided in other shapes.

Further, please refer to Figures 22 and 23. After the clamping arm 100 clamps the target tissue 2, the moving part 410 needs to move together with the clamping arm 100 to a predetermined locking position for locking, that is, the clamping table 4122 needs to move to Only the position corresponding to the elastic buckle 330 can achieve locking. However, in actual use, when the hardness or thickness of the human tissue held by the clamping member 1 is different (as shown in Figure 22), the closing angle of the clamping member 1 will be limited. Because the closing angle is related to the stroke of the moving part 410, at this time, the moving part 410 cannot move to the locking position, and the clamping arm 100 cannot remain in the clamping state.

To address this problem, please refer to Figures 19-24. The bendable portion 120 has a deformation portion 123 arranged along the longitudinal direction. When the clamping arm 100 is in the clamping state, if a larger target tissue 2 is clamped, it is difficult for the clamping arm 100 , the moving part 410 and the connecting arm 420 to move to achieve self-locking and locking with the limiting part 310 The position where the mating part is locked. When greater pulling force is continued to be applied to the transmission member 510, the deformation part 123 will be forced to be extruded and deformed longitudinally inward to drive the clamping arm 100, the moving part 410 and the connecting arm 420 as a whole relative to the supporting part and the limiting part 310. Move toward the rear end of the plug-in tissue clamping device to achieve self-locking of the connecting arm 420 and the limiting part 310 and locking of the moving part 410 and the locking mating part. There is a gap between the deformation part 123 and the support arm 300 to form an escape area around the outer periphery of the deformation part 123 to facilitate deformation.

Specifically, please refer to Figure 20. When the clamping arm 100 clamps the thin target tissue 2, the clamping arm 100 can be closed normally, the deformation part 123 maintains a normal gap, and the moving part 410 and the clamping arm 100 can be as described above. As shown in the figure, the clamping arm 100 is accurately moved to the position of the locking structure to lock the clamping arm 100 in the clamping state. Please refer to Figures 21 and 22. When the clamping arms 100 clamp the thick target tissue 2, the clamping arms 100 cannot be closed to the extent shown in Figure 20. At this time, force is continued to be applied to the moving part 410. When the operator intentionally exerts greater force, the deformation portion 123 undergoes substantial deformation, thereby compensating for the lost stroke on the clamping arm 100 and the moving part 410, so that the clamping arm 100 can finally be locked to the locking structure. superior.

Please refer to Figures 19-23. In different opening states of the clamping arm 100, the deformation part 123 provides an adaptive stroke range for the moving part 410, and produces a larger deformation range after receiving a specific pulling force, always allowing elasticity. The buckle 330 can be locked accurately and reliably, and allows the connecting arm 420 and the limiting member 310 to realize self-locking.

In one embodiment, in order to enable the deformation part 123 to better produce longitudinal deformation, the deformation part 123 may be in an annular shape, or may be in a front arch shape, a rear arch shape, or other shapes. In one embodiment, please refer to FIG. 19 , the deformation part 123 has a front arch part 1231 protruding toward the front end of the deformation part 123 and/or a rear arch part 1232 protruding toward the rear end of the deformation part 123. The front arch part 1231 and /Or the rear arch 1232 can be extruded and deformed inwardly when subjected to external force, so that the two come into contact with each other or tend to approach each other.

Please refer to Figure 19. In one embodiment, the deformation portion 123 has an elliptical structure. Of course, in other embodiments, the deformation portion 123 can also be in other shapes, such as a circular structure or a rhombus structure.

Specifically, the first contraction joint group 121 and the second contraction joint group 122 are provided on the front side of the deformation part 123, and the twist deformation section 124 is connected to the front part of the deformation part 123, that is, the upper wall of the deformation part 123 (such as the front arch) 1231) is connected to the twisted deformation section 124 of the clamping arm 100. The lower wall of the deformation part 123 (such as the rear arch part 1232) is connected to the connecting part 140 (described in detail later). There is a certain gap between the deformation part 123 and the support arm 300 in the transverse direction to avoid interference. After receiving force, the arc of the deformation part 123 will gradually increase, and even become a straight line, and the quadrant points of the upper and lower walls will also overlap.

The deformation amplitude of the deformation part 123 can be determined based on the difference between the actual stroke and the expected stroke between the connecting arm 420 and the stopper 310 when the clamping arm 100 clamps the larger target tissue 2, that is, as shown in Figure 23. The distance between the connecting arm 420 and the limiting member 310 from the locking and self-locking positions determines the deformation size of the deformation portion 123 . After repeated experiments, in one embodiment, the maximum distance a of the inward extrusion deformation of the deformation part 123 ranges from 0.1 mm ≤ a ≤ 1.0 mm, for example, 0.3-0.8 mm.

The deformation part 123 can adaptively float and deform in the clamping direction, so that when the clamping member 1 clamps the target tissue 2 , the bendable part 120 can adaptively bend and deform according to the volume of the target tissue 2 to provide the clamping arm 100 with a The adaptive stroke range always allows the moving part 410 and the clamping arm 100 to move to the locking position, achieving accurate and reliable locking. The deformation part 123 is designed so that when the operator opens and closes the clamp 1 normally, the operating force does not cause the clamp to lock, but it needs to be released when the operator intends to release the clamp. Large deformation, resulting in stable and reliable locking.

Furthermore, the number of the deformation portion 123 is not limited to one. For example, please refer to Figures 24 and 25. The number of the deformation portion 123 is also two or more. These deformation portions 123 are connected in sequence along the longitudinal direction of the clamping arm 100. . Through the deformation superposition of multiple deformation parts 123, each deformation part 123 is slightly deformed when compressed inward, and finally superimposed together to obtain a larger displacement toward the rear end, which is used to compensate for the tolerance of the elastic buckle 330. , so that it can be locked reliably, and the connecting arm 420 and the limiting member 310 can realize self-locking.

In addition, please refer to Figure 26. In another embodiment, the aforementioned first shrinkage seam group 121 and the second shrinkage seam group 122 can also be omitted, and the bendable portion 120 is composed of a plurality of deformation portions 123. These deformations The portions 123 are connected in sequence along the longitudinal direction of the clamping arm 100, and the opening and closing of the clamping arm 100 is achieved through the deformation of these deformation portions 123.

The above embodiment shows a structure in which the bendable part 120 realizes bending deformation by opening the first shrinkage slit group 121, the second shrinkage slit group 122 and the twist deformation section 124. The structure of the bendable part 120 in this embodiment is not limited to This can also be achieved in other ways.

For example, in one embodiment, in the clamping arm 100 , the thickness of the bendable part 120 can also be set to be thinner than other parts, such as the clamping head 110 and the connecting part 140 , so that the moving part 410 When the clamping arm 100 is driven to move, the bendable portion 120 can be bent and deformed preferentially.

In one embodiment, in the clamping arm 100 , the bendable portion 120 can have a material and structure that is more easily bendable and deformable, such as a material that is more easily bendable and deformable than the clamping head 110 and the connecting portion 140 , such as one with better bending performance. Metal material, plastic material or wire mesh, etc., so that when the moving part 410 drives the clamping arm 100 to move, the bendable part 120 can be bent and deformed preferentially. Of course, the bendable portion 120 can also adopt other structures with better bending deformation performance, such as metal braided structures.

Furthermore, the first stroke, the second stroke and the third stroke are three parts of the entire movement stroke of the transmission member 510. The three strokes may be in the same direction, or at least two strokes may be in different directions. Each stroke can be completely separated and not related at all, or at least two strokes can be continuous or overlapping. For example, the third stroke can be closely connected to the second stroke. Of course, the second stroke and the third stroke can also be two separate and non-continuous parts.

As an example, please refer to Figures 2-4. At this time, the transmission member 510 is in the first stroke. At this time, the transmission member 510 is away from the control handle 3 along its axial direction, moves to the front end, and drives the clamping arm 100 outward. Open, thereby moving the clamping arm 100 to an open state.

Please refer to Figures 5-7. At this time, the transmission member 510 is in the second stroke. The transmission member 510 is close to the control handle 3 along its axial direction and moves to the rear end. The transmission member 510 can drive the clamping arm 100 inward. approach each other, so that the clamping arms 100 move to the clamping state.

Please refer to Figures 13-18 and 27-32. At this time, the transmission member 510 is in the third stroke. The transmission member 510 is close to the control handle 3 along its axial direction. When it is away from the clamping arm 100, the third stroke and The second strokes are in the same direction and closely connected. That is, after the clamping arm 100 moves to the clamping state, the transmission member 510 switches from the second stroke to the third stroke. The third stroke can be divided into a plurality of sub-strokes, and these sub-strokes include a locking stroke, an inner disengagement stroke and an outer disengagement stroke.

Please refer to Figures 16-18. When the transmission member 510 switches to the third stroke and moves to the position shown in the figure, the clamping arm 100 is locked at this time, and the transmission member 510 cannot move reversely and open the clamping arm 100 again. During this process, the movement stroke of the transmission member 510 is the locking stroke.

Please refer to Figures 27-29. After the transmission member 510 completes the locking stroke, it enters the inner disengagement stroke. When the transmission member 510 moves to the position shown in the figure, the clamping arm 100 is separated from the transmission member 510. The transmission member 510 can no longer drive the clamping arm 100 to move, and the control of the clamping arm 100 is lost, and the clamping arm 100 is Remain locked. During this process, the movement stroke of the transmission member 510 is the inner disengagement stroke.

Please refer to Figures 30-32. After the transmission member 510 completes the inner disengagement stroke, it enters the outer disengagement stroke. When the transmission member 510 moves to the position shown in the figure, the clamping arm 100 and the separation base 200 are separated. At this point, the clamping arm 100 is left on the target tissue 2 it clamps. The separation base 200 and the transmission member 510 can be extracted from the patient's body. During this process, the movement stroke of the transmission member 510 is the outer disengagement stroke.

Of course, Figures 13-18 and Figures 27-32 only show one embodiment of the third stroke. During the third stroke, the transmission member 510 separates the clamping arm 100 from the transmission member 510 and separates the base. 200 and the clamping arm 100 can be separated from each other at the same time, or any one action can be achieved before the other action. In other embodiments, the locking stroke, the inner disengagement stroke and the outer disengagement stroke can also be overlapped. For example, the inner disengagement stroke and the outer disengagement stroke overlap, and the inner disengagement and the outer disengagement are realized simultaneously.

In order to achieve internal disengagement, this application provides an example in which the front end of the transmission member 510 has a first engaging portion, and the rear end of the moving member 410 has a second engaging portion. The first latching part and the second latching part are latched together. Wherein, at least one of the first clamping part and the second clamping part is a deformable structure. When the transmission member 510 moves along the third stroke, the deformable structure can deform under the pulling force of the transmission member 510, so that the first The latching part and the second latching part are disengaged, and the moving part 410 is separated from the transmission part 510 .

The deformable structure refers to a structure that can be deformed only when the tensile force reaches a set value. This structure can be realized through material and structural design. For example, elastic materials are used to make the deformable structure.

Among the first snap-in part and the second snap-in part, one is a deformable connection part and the other is a mating slot, and the deformable connecting part is snap-connected in the mating slot. Please refer to Figures 8, 28 and 29. The deformable connecting portion 511 is provided on the transmission member 510, and the matching slot 413 (which can be a through hole or a blind hole) is provided at the bottom of the moving member 410. The shape of the matching slot 413 matches the shape of the deformable connecting part 511 to lock the deformable connecting part 511 .

Please refer to Figures 8, 28 and 29. In one embodiment, the deformable connecting part 511 includes at least one deformable hook, and the deformable hook is connected in the corresponding matching slot 413. When the applied pulling force reaches a set value, the deformable hook can be pulled to deform and fall off from the matching slot 413 .

A long slot can be opened in the middle of the rear end of the transmission member 510, and a limiting pin passes through it. The bottom is cylindrical and is connected to a traction member (such as a traction rope). When the pulling force of the traction rope is greater than the load-bearing limit of the deformable hook, the deformable hook deforms inward and is separated from the moving part 410 .

For a better buckling effect, please refer to Figures 8, 28 and 29. In one embodiment, the deformable connecting part 511 includes two deformable hooks, and the two deformable hooks are arranged away from each other. The matching slot 413 can be provided with two cavities connected symmetrically to the left and right. In addition, the deformable connecting part 511 can also have at least one intermediate limiting body 512. The intermediate limiting body 512 is located between the two deformable hooks to prevent the two deformable hooks from excessive deformation to the opposite side. The separation force is not uniform enough.

Of course, other internal disengagement structures can also be used between the moving member 410 and the transmission member 510 to replace the structure shown in the above embodiment.

Further, please refer to Figures 2-7. In one embodiment, the clamping arm 100 includes a connecting part 140, which is provided on the rear side of the bendable part 120. The connecting part 140, the bendable part 120, and the clamping The head 110 and the support arm 300 are an integrally formed structure. The connecting part 140 is used to connect the flexible part 120 , the clamping head 110 and the supporting arm 300 to the separation base 200 . The separation base 200 and the connection part 140 may be integrally formed, or may be separately manufactured and then fixedly connected.

In order to achieve external detachment, in one embodiment, please refer to Figures 2 and 30-32. The separation base 200 is rotatably connected to the casing assembly 520, so that the clamping member 1 can rotate as a whole relative to the casing assembly 520. The clamping arm 100 and the supporting arm 300 are integrated with the separation base 200 through the first tearing part 210 . In this embodiment, the separation base 200 and other parts of the clamping member 1 are integrally formed, and the two are connected into one body through the first tearing portion 210 . In addition, the separation base 200 and other parts of the clamping member 1 can also be integrally connected by snapping or other means.

In one embodiment, please refer to Figures 30-32. The separation base 200 has a follower 220. The follower 220 is used to receive an external force to drive the separation base 200 from the first tearing part 210 to the clamping part. Part 1 is broken in other parts. For example, the external force exerted by the operator can be transmitted to the first tearing part 210 through the moving part 410 or other components.

Please continue to refer to Figures 30-32. In one embodiment, the follower 220 is driven to move by the moving part 410. Specifically, the follower 220 is located on the movement trajectory of the moving part 410. When the moving part 410 moves to the position of the follower 220, the follower 220 can be driven to move toward the control handle 3 side together. Therefore, under the action of the moving part 410 , the separation base 200 and the connecting part 140 are broken from the first tearing part 210 .

Further, please refer to Figures 30-32. In the external detachment structure, there is at least one first tearing portion 210, and the entire end of the clamping arm 100 and the supporting arm 300 opposite to the separation base 200 has a concave area 150. For example, the recessed area 150 is provided on the connecting portion 140 . The first tearing part 210 is provided in the recessed area 150 , and the separation base 200 is connected to the clamping arm 100 and the supporting arm 300 only through the first tearing part 210 . This design allows the fracture surface of the first tear portion 210 to be stored in the concave area 150 after the first tear portion 210 is broken, thereby preventing the sharp burrs from being exposed after the break and causing damage to the surgical object.

Further, please refer to Figure 20 and Figures 30-32. In one embodiment, the separation base 200 includes a cylindrical main body 230 and a hanging portion 240. The side wall of the main body 230 has a hanging cavity 231, and the hanging portion 240 is placed in the hanging cavity. inside cavity 231. The hanging portion 240 is aligned with and connected to the first tear portion 210 . The hanging part 240 is provided with the above-mentioned follower 220. For example, the follower 220 is a limiting shaft fixedly installed on the hanging part 240, and the limiting shaft traverses the hanging part 240. The follower 220 is used to drive the suspension portion 240 and the transmission member 510 to move toward the rear end when the transmission member 510 moves along the third stroke. Both sides of the hanging portion 240 are connected to the main body 230 through the hanging arms 241, so that the hanging portion 240 can deform relative to the main body 230 to tear the first tearing portion 210.

Specifically, please refer to Figures 30-32. The moving part 410 may also be provided with a limiting groove 513 opened along its axial direction, and the follower 220 is placed at the bottom of the limiting groove 513. As the moving part 410 moves to the side of the control handle 3, when the moving part 410 enters the outer disengagement stroke, the top of the limiting groove 513 moves to the follower 220, thereby starting to drive the follower 220 and the suspension part 240. Move toward the control handle 3 side, thereby causing the separation base 200 to separate from the connecting portion 140 .

As a more specific embodiment, please refer to Figures 30-32. The follower 220 is a limiting shaft, and the limiting shaft is placed in the limiting groove 513.

In one embodiment, the width of the first tearing portion 210 can be reserved as needed, and multiple first tearing portions 210 can also be provided according to functional requirements to make the structure more reliable and stable.

In order to bear uniform force, please refer to Figures 30-32. In one embodiment, there are at least two first tearing parts 210 and hanging parts 240, and the first tearing parts 210 are distributed along the circumferential direction of the separation base 200. Each first tearing portion 210 is provided with a corresponding hanging portion 240 . Uniform distribution refers to the same distance or angle between adjacent first tear portions 210 or hanging portions 240 .

In addition, the follower 220 can also play a stroke limiting role on the moving part 410, restricting the moving part 410 to move within a set range, so as to limit the extreme stroke of the moving part 410 to the front end, thereby limiting the clamping part 1 the opening stroke. Please refer to FIG. 3 . When the limiting groove 513 moves to the front end to the position of the follower 220 , the follower 220 blocks the transmission member 510 , thereby limiting the forward movement of the moving member 410 and the opening stroke of the clamping member 1 .

Further, please refer to FIGS. 30-32 . In one embodiment, both sides of the suspension part 240 are connected to the main body 230 through suspension arms 241 so that the suspension part 240 can be deformed relative to the main body 230 more easily.

Specifically, when the moving member 410 moves along the outer disengagement stroke, the entire separation base 200 is supported by the sleeve assembly 520 and cannot move toward the control handle 3 alone. When the moving part 410 pulls the hanging part 240 , the main body 230 of the separation base 200 remains stationary, and the suspension arm 241 of the hanging part 240 is deformed under the pulling force of the moving part 410 . During the deformation process of the hanging part 240, the main body 230 of the separation base 200 forms a reverse support for the clamping arm 100 and the like, and then the materials of the hanging arm 241 and the first tearing part 210 are gradually elongated. As shown in Figures 30-32, when the yield limit is reached, fracture occurs, and the hanging part 240 and the connecting part 140 achieve external separation. Thereafter, the separation base 200 together with the transmission assembly 5 can be taken out of the surgical subject's body.

In order to prevent the suspension part 240 from deforming in an unintended direction when the moving part 410 pulls the suspension part 240, please refer to Figures 30-32. In one embodiment, the suspension cavity 231 has a guide arranged along the axial direction of the separation base 200. Groove 232, the hanging part 240 is placed in the guide groove 232 to guide the hanging part 240 to move into the guide groove 232. The guiding direction defined by the guide groove 232 is aligned with the first tearing portion 210 , thereby making it easier for the hanging portion 240 to break from the first tearing portion 210 .

Those skilled in the art will recognize that many changes may be made in the details of the embodiments described above without departing from the basic principles of the invention. Accordingly, the scope of the invention should be determined from the following claims.

Claims

A clamping member of an insertable tissue clamping device , It is characterized in that it includes at least two clamping arms, the clamping arms include a clamping head and a bendable part, the clamping head is used to clamp the target tissue, and the clamping head and the bendable part are remain relatively fixed, and the bendable portion has a structure capable of bending toward the closing direction of the clamping arm and / Or a curved structure bent in the opening direction of the clamping arm;

The bending structure has at least one deformation portion arranged longitudinally. When the clamping arm is in the clamping state, the deformation portion can be extruded and deformed inward to drive the entire clamping arm toward the clamping member. Backend moves.
such as rights Require 1 The clamping member is characterized in that the deformation part has a front arch part protruding toward the front end of the deformation part and / or a rear arch protruding toward the rear end of the deformation portion, the front arch and / Or the rear arch portion can be compressed and deformed inwardly when subjected to external force.
such as rights Require 1 or 2 The clamping member is characterized in that the curved structure includes a plurality of first contraction seam groups and a second contraction seam group, each of the first contraction seam groups has at least one first contraction seam, and each of the first contraction seam groups has at least one first contraction seam group. The second shrinkage seam group has at least one second shrinkage seam, and the first shrinkage seam and the second shrinkage seam extend along the circumferential direction of the bendable portion; the first shrinkage seam group and the third shrinkage seam group Two shrinkage seam groups are spaced and staggered along the longitudinal direction of the clamping arm; the overlapping area between the first shrinkage seam and the second shrinkage seam forms a twisted deformation section to enable the bendable portion to bend Torsional deformation.
such as rights Require 3 The clamping member is characterized in that the first contraction seam group and the second contraction seam group are provided on the front side of the deformation part, and the twist deformation section is connected to the front part of the deformation part. .
such as rights Require 1-4 The clamping member according to any one of the preceding paragraphs, characterized in that there are at least two deformation parts, and the deformation parts are connected in sequence along the longitudinal direction of the support arm.
such as rights Require 1-5 The clamping member according to any one of the preceding paragraphs, characterized in that the maximum distance of the inward extrusion deformation of all the deformation portions is a The value range is: 0.1mm ≤ a ≤ 1.0mm .
such as rights Require 1-6 The clamping member according to any one of the preceding paragraphs, characterized in that the deformation part is generally in an elliptical structure, a circular structure or a rhombus structure.
such as rights Require 1-7 The clamping member according to any one of the preceding paragraphs, wherein the clamping head and the bendable portion are an integral structure cut on the same base material by a laser cutting process.
such as rights Require 1-8 The clamping member according to any one of the preceding paragraphs, characterized in that the clamping member has a locking fitting part, and the locking fitting part is used to lock with the moving part to prevent the clamping arm from opening.
such as rights Require 9 The clamping member is characterized in that the clamping arm includes a support arm, the support arm is located between the two clamping arms, and the locking fitting part is formed by a partial area of the support arm. An elastic buckle formed by extending inward.
such as rights Require 10 The clamping member is characterized in that there is a gap between the deformation part and the support arm to form an avoidance area on the outer periphery of the deformation part.
such as rights Require 10 or 11 The clamping member is characterized in that the clamping arm and the supporting arm are an integral structure cut on the same base material through a laser cutting process.
such as rights Require 10-12 The clamping member according to any one of the preceding paragraphs, characterized in that a pair of support arms is provided with limiting members transversely, and the limiting members span between the two clamping arms.
A plug-in tissue clamping device , It is characterized by:

such as rights Require 1-13 The clamping member described in any one of the items;

And a motion control component, the motion control component includes a moving part, the moving part is disposed in the clamping part in a manner that can move axially along the clamping part, the moving part and the clamping arm Connected to drive the clamping arms open and closed.
such as rights Require 14 The plug-in tissue clamping device is characterized in that the moving part has a locking part, and the locking part is used to lock the clamping arm when the clamping arm is separated from the transmission part. , to prevent the clamping arm from opening.
such as rights Require 15 The plug-in tissue clamping device is characterized in that the locking part is a clamping platform provided on the moving part.