Anastomat

Abstract

The invention provides an anastomat which comprises a rigid tube and a handle assembly, the first end of the rigid tube is connected with the handle assembly, and the rigid tube is provided with a first cavity formed in the length direction; the first end of the flexible rod assembly is connected to the second end of the rigid pipe; the nailing mechanism is connected to a connecting assembly at the second end of the flexible rod assembly, the connecting assembly penetrates through the first cavity, one end of the connecting assembly is connected with the flexible rod assembly, the other end of the connecting assembly is connected with the handle assembly, and the handle assembly can apply pulling force to the connecting assembly; when the handle assembly exerts pulling force on the connecting assembly, the connecting assembly drives the flexible rod assembly to be bent, and the bending angle is in direct proportion to the pulling force. The problem that the rotation range of the anastomat is small is solved, the rotation range of the anastomat is widened, and surgical operation requirements at different positions are met.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a stapler. Background Art

[0002] The surgical stapler is a minimally invasive surgical instrument commonly used in surgery. It replaces traditional manual suturing and is mainly used for organ stump sealing and incision anastomosis in minimally invasive surgical treatment.

[0003] The existing stapler also includes a cutting function, which can cut tissues while suturing. The cutting and stapling action of the operation is completed by pushing the cutting knife into the stapling mechanism, and a joint head is set at the connection of the stapling mechanism. The joint head can be bent at a certain angle by using the steering teeth, thereby changing the working range of the stapling mechanism. However, due to the limitations of the position and material of the cutting knife and the steering tooth structure, the bending angle of the joint head can only be maintained at about 45°±5°.

[0004] In certain types of surgeries, existing staplers will limit the operating range and cannot work properly. For example, in laparoscopic surgery, the cavity is relatively narrow, and the existing stapler's joint head has a small rotation range, which is not convenient for clamping tissues. Especially for low-position rectal cancer anal preservation surgery, the space in the pelvic cavity limits the angle at which the stapler enters the pelvic cavity, resulting in patients with low-position tumors being unable to remove the lesions with staplers.

[0005] Therefore, the existing stapler has a relatively small rotation range and cannot meet the needs of surgeries requiring large operating angles.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the application and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] In view of this, the purpose of the present application is to provide a stapler to solve the problem of the small rotation range of the stapler, increase the rotation range of the stapler, and meet the surgical operation requirements at more positions.

[0008] To achieve the above-mentioned purpose, the present application provides a stapler, comprising: a rigid tube and a handle assembly, wherein a first end of the rigid tube is connected to the handle assembly, and the rigid tube has a first cavity opened along a length direction;

[0009] a flexible rod assembly, a first end of the flexible rod assembly connected to a second end of the rigid tube;

[0010] a stapling mechanism connected to the second end of the flexible rod assembly;

[0011] A connecting assembly, wherein the connecting assembly passes through the first cavity, one end of the connecting assembly is connected to the curved flexible rod assembly, and the other end of the connecting assembly is connected to the handle assembly, and the handle assembly can apply a pulling force to the connecting assembly;

[0012] When the handle assembly applies a pulling force to the connecting assembly, the connecting assembly drives the plurality of flexible rod assemblies to bend, and the bending angle is proportional to the pulling force.

[0013] As a further improvement of the embodiment of the present application, the sex rod assembly comprises: a plurality of ball joints;

[0014] A second cavity is provided in the ball joint, and the connecting assembly passes through the second cavity of each ball joint in sequence to connect all the ball joints; when working, two adjacent ball joints abut against each other;

[0015] Under the pulling of the connecting assembly, two adjacent ball joints rotate relative to each other to bend the bending flexible rod assembly.

[0016] As a further improvement of the embodiment of the present application, the ball joint comprises:

[0017] A spherical portion and a matching portion, wherein the spherical portion and the matching portion are respectively arranged at two ends of the ball joint;

[0018] The matching portion of the ball joint is matched and connected with the spherical portion of the adjacent ball joint, and the spherical portion can rotate in the matching portion.

[0019] As a further improvement of the embodiment of the present application, the matching portion includes:

[0020] A supporting wall, wherein the supporting wall encloses a space with an opening, and an arc surface structure is provided along the wall thickness direction of the supporting wall, wherein the arc surface structure cooperates with the adjacent spherical portion, and the adjacent spherical portion can abut against the arc surface structure.

[0021] As a further improvement of the embodiment of the present application, the stapling mechanism includes:

[0022] An anvil and a nail magazine seat, wherein the anvil is fixedly connected to one end of the connecting assembly, and the anvil and the nail magazine seat are hinged;

[0023] When the connecting assembly is pulled toward the first end of the rigid tube, the connecting assembly drives the nail support seat to close toward the nail magazine seat.

[0024] As a further improvement of the embodiment of the present application, the handle assembly includes:

[0025] A handle body and a grip, wherein the grip is hinged to the handle body;

[0026] The other end of the connecting assembly is connected to the handle, and the handle is used to pull the connecting assembly.

[0027] As a further improvement of the embodiment of the present application, the connection component includes:

[0028] a traction belt, one end of which is nested in the handle;

[0029] A reversing wheel, the reversing wheel is rotatably connected to the handle body, and the traction belt abuts against a wheel groove of the reversing wheel;

[0030] A transmission kit, wherein the transmission kit passes through the first cavity, the center line of the transmission kit is colinear with the center line of the flexible rod assembly in an unbent state, and the other end of the traction belt is embedded in the transmission kit;

[0031] A flexible connector, one end of which is connected to the transmission kit, and the other end of which is connected to the stapling mechanism.

[0032] As a further improvement of the embodiment of the present application, the stapler further comprises:

[0033] A cutting assembly, the cutting assembly comprising a first driving member and a cutting tool;

[0034] The flexible rod assembly comprises:

[0035] The third cavity is opened in the flexible rod assembly, the cutting tool passes through each of the third cavities in sequence, and the first driving member is used to drive the cutting tool to move from the third cavity to the stapling mechanism.

[0036] As a further improvement of the embodiment of the present application, a step portion is provided on the ball joint close to the rigid tube, and a step matching portion is provided at the second end of the rigid tube, and the step portion and the step matching portion are engaged with each other.

[0037] As a further improvement of the embodiment of the present application, the flexible rod assembly is configured as a snake tube;

[0038] Or the flexible rod assembly is configured as a spring flexible shaft.

[0039] Compared with the prior art, the stapler of the present application has the following advantages:

[0040] By providing a connecting assembly and a handle assembly to drive the flexible rod assembly to bend, the bending radius is increased, and large-angle bending can be achieved. It is suitable for surgeries that require large-angle anastomosis operations, and the use range of the stapler is increased. In addition, by pulling the connecting assembly, a pulling force is applied to the flexible rod assembly, thereby achieving the effect of bending and fixing the flexible rod assembly, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of the overall structure of a stapler according to an embodiment of the present application;

[0042] Figure 2 is a schematic diagram of the internal structure of a stapler according to an embodiment of the present application;

[0043] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0044] Figure 4 is a schematic diagram of a bending state of a flexible rod assembly according to an embodiment of the present application;

[0045] Figure 5 is a partial structural diagram of a flexible rod assembly according to an embodiment of the present application;

[0046] Figure 6 is a schematic diagram of a partial internal structure of a stapler according to an embodiment of the present application;

[0047] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0048] Figure 8 is a schematic diagram of a partial internal structure of a stapler according to an embodiment of the present application;

[0049] Fig. 9 is a schematic structural diagram of a ball joint according to an embodiment of the present application.

[0050] Description of main reference numerals:

[0051] 1. Stapler; 10. Rigid tube; 11. First cavity; 12. Step mating portion; 20. Handle assembly; 21. Handle body; 22. Handle; 30. Flexible rod assembly; 31. Ball joint; 311. Second cavity; 312. Spherical portion; 313. Mating portion; 314. Step portion; 315. Support wall; 3151. Arc surface structure; 316. Through hole; 317. Tubular structure; 40. Stapling mechanism; 41. Nail support; 42. Nail magazine seat; 50. Connecting assembly; 51. Traction belt; 52. Reversing wheel; 53. Transmission kit; 54. Flexible connector; 55. Fixed connection node; 60. Cutting assembly; 61. Cutting tool; 62. First drive member; 621. First motor; 622. Transmission shaft. Specific embodiments

[0052] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0053] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] It should be noted that, in order to more clearly describe the structure of the stapler, the term "distal end" is defined herein to mean the end away from the operator during the surgical operation, and the term "proximal end" is defined herein to mean the end close to the operator during the surgical operation. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0055] In the prior art, at the bending position between the stapler main body and the stapling mechanism, there is a single bending center, which is bent with a single axis. The stapler main body and the stapling mechanism may be bent by gear connection or hinge. In addition, a driving structure needs to be set at the connection position. Therefore, under the limitation of the structure, the rotation angle range of the single bending center is limited, and a large angle rotation cannot be performed well. In addition, only a single bending center is set, so that the cutting tool inside the bending part is greatly squeezed at the bending position, which is easy to reach the yield strength. When the cutting tool reaches the yield strength, the cutting tool breaks, which will cause serious medical accidents.

[0056] like Figure 1 and Figure 2 As shown, a stapler 1 according to an embodiment of the present application includes a rigid tube 10, a handle assembly 20, a flexible rod assembly 30 and a stapling mechanism 40. The first end of the rigid tube 10 is connected to the handle assembly 20, the second end of the rigid tube 10 is connected to the first end of the flexible rod assembly 30, the second end of the flexible rod assembly 30 is connected to the stapling mechanism 40, and the flexible rod assembly 30 is located between the rigid tube 10 and the stapling mechanism 40. When the operator holds the handle assembly 20 to operate the stapler 1, the operator uses the flexible rod assembly 30 to change the operating angle of the stapling mechanism 40 to increase the working range of the stapling mechanism 40.

[0057] like Figure 2 , Figure 3 and Figure 6 As shown, the stapler 1 also includes a connecting assembly 50. The rigid tube 10 has a first cavity 11 opened along the length direction. The connecting assembly 50 passes through the first cavity 11. One end of the connecting assembly 50 is connected to the flexible rod assembly 30, and the other end is connected to the handle assembly 20. The handle assembly 20 can apply tension to the connecting assembly 50; the connecting assembly 50 drives multiple bending parts to bend at the same time. When the handle assembly applies tension to the connecting assembly, the flexible rod assembly in the connecting assembly 50 is driven to bend, and the bending angle is proportional to the tension. The connecting assembly 50 applies tension to multiple bending parts, and the adjacent bending parts are tightened. After tightening under the action of tension, each bending part rotates with an independent bending center to achieve the bending effect of the flexible rod assembly 30.

[0058] like Figure 4 and Figure 5 As shown, the flexible rod assembly 30 includes a plurality of ball joints 31, which are arranged in sequence along the direction from the stapling mechanism 40 to the rigid tube 10. Each ball joint 31 has an independent bending center, and the plurality of ball joints 31 are arranged together to form a bending track composed of a plurality of bending centers, so that the bending angle between the rigid tube 10 and the stapling mechanism 40 can be greater than the bending angle of a single ball joint 31, and the bending radius of the flexible rod assembly 30 is increased, thereby further increasing the working range of the stapling mechanism 40.

[0059] In a specific embodiment, Figure 3 and Figure 7 As shown, the stapler 1 also includes a cutting assembly 60, which includes a first driving member 62 and a cutting tool 61; the flexible rod assembly 30 also includes a third cavity opened inside, and the cutting tool 61 passes through each third cavity in turn, and the first driving member 62 is used to drive the cutting tool 61 to move from the third cavity to the stapling mechanism 40.

[0060] It should be noted that in the prior art, the curved portion of the stapler 1 has a bending center. When the stapler mechanism 40 and the rigid tube 10 are bent, the rigid tube 10 and the cutting tool 61 inside the stapler mechanism 40 also bend at the bending center. At this time, the other parts of the cutting tool 61 are in a straight state and have only one bending position. The bending position of the cutting tool 61 is subjected to a large extrusion force and is easy to reach the yield strength, resulting in the blade breaking. In this embodiment, the flexible rod assembly 30 has multiple bending centers, which disperses the bending stress, reduces the stress concentration, does not produce a sharp angle or a right angle bending state, increases the bending radius, and reduces the damage to the cutting blade.

[0061] Specifically, Figure 8 As shown, the first driving member 62 includes a first motor 621 and a transmission shaft 622. The first motor 621 is connected to the transmission shaft 622, and the transmission shaft 622 is connected to the cutting tool 61. The first motor 621 is located in the handle assembly 20, and the transmission shaft 622 is located in the first cavity 11 of the rigid tube 10. The transmission shaft 622 converts the rotation of the first motor 621 into linear movement, so that the cutting tool 61 moves linearly under the drive of the first driving member 62, bends under the extrusion of the flexible rod assembly 30, and moves from the third cavity of the flexible rod assembly 30 to the stapling mechanism 40 to achieve cutting of the surgical tissue.

[0062] Specifically, the transmission shaft 622 is provided with a threaded portion or a toothed portion, and the end of the cutting tool 61 is provided with a threaded matching portion 313 or a rack matching portion 313 to realize the conversion of rotation into linear movement.

[0063] In a specific embodiment, Figure 4 and Figure 5 As shown, the ball joint 31 includes a plurality of ball joints 31, a second cavity 311 is provided in the ball joint 31, and the connecting assembly 50 passes through the second cavity 311 of each ball joint 31 in turn to connect all the ball joints 31; when working, two adjacent ball joints 31 abut against each other, and under the pulling of the connecting assembly 50, the two adjacent ball joints 31 rotate relative to each other to make the flexible rod assembly 30 bend.

[0064] After the connecting assembly 50 is pulled, the adjacent ball joints 31 are tightened, the gaps between the adjacent ball joints 31 are eliminated and they fit tightly, and at the same time, after the ball joints 31 fit tightly, the friction between the adjacent ball joints 31 is large, so the movement between the multiple ball joints 31 is fixed, achieving the effect of bending and fixing the bent flexible rod assembly 30.

[0065] In a specific embodiment, Figure 5 As shown, the ball joint 31 includes a spherical portion 312 and a matching portion 313, which are respectively arranged at two ends of the ball joint 31, and the matching portion 313 of the ball joint 31 is matched and connected with the spherical portion 312 of the adjacent ball joint 31, and the spherical portion 312 rotates in the matching portion 313.

[0066] By utilizing the cooperation between the adjacent matching parts 313 and the spherical parts 312, the arrangement of the adjacent ball joints 31 is maintained in a relatively stable state, and each ball joint 31 also has the freedom of rotation. When the connection assembly 50 is pulled, the linear distance between the adjacent spherical parts 312 gradually decreases. Due to the freedom of rotation of the spherical parts 312, the decrease in the linear distance will be manifested as the spherical parts 312 rotating in the matching parts 313, and the angle between the axes of the adjacent ball joints 31 gradually decreases from 180 degrees. After a certain bending angle is generated between the adjacent ball joints 31, each ball joint 31 has a separate bending center. Arranging multiple ball joints 31 means having multiple bending centers, which can increase the bending radius and bending angle.

[0067] It should be noted that the more ball joints 31 are provided, the more bending centers of the curved flexible rod assembly 30 are provided, and the more stress concentration points of the cutting tool 61 are provided, which can further reduce the risk of the cutting tool 61 breaking. Alternatively, when the bending radius is large, by increasing the number of ball joints 31, a unilateral 90° bending angle can be achieved, greatly increasing the applicable scope of the stapler 1. For example, in the anus-preserving surgery for low-positioned rectal cancer, the stapler 1 that can be bent 90° can provide more angles in the pelvic cavity and remove lesions at a lower position of the tumor.

[0068] In a specific embodiment, Figure 5 and Fig. 9 As shown, the mating portion 313 includes a supporting wall 315, the space enclosed by the supporting wall 315 has an opening, and the arc surface structure 3151 along the wall thickness direction of the supporting wall 315 cooperates with the spherical portion 312. When adjacent ball joints 31 are arranged, the spherical portion 312 abuts against the arc surface structure of the supporting wall 315 and can rotate at the opening.

[0069] Furthermore, the space enclosed by the supporting wall 315 is the second cavity 311 for passing the connecting component 50 or the third cavity for passing the cutting tool 61 .

[0070] Specifically, the ball joint 31 also includes a through hole 316, an opening is formed on the outer surface of the spherical portion 312 facing the internal space, and a tubular structure 317 is arranged from the inner surface of the spherical portion 312 toward the mating portion 313, and the through hole 316 is arranged inside the tubular structure 317. When the connecting component 50 and the cutting tool 61 pass through the ball joint 31, the tubular structure 317 can improve the stability of the connecting component 50 and the cutting tool 61.

[0071] In the embodiments of the present application, Figure 3 As shown, the stapling mechanism 40 includes a nail anvil 41 and a nail magazine seat 42, the nail anvil 41 is fixedly connected to one end of the connecting assembly 50, the nail anvil 41 and the nail magazine seat 42 are hinged, and when the connecting assembly 50 is pulled toward the first end of the rigid tube 10, the connecting assembly 50 drives the nail anvil 41 to close toward the nail magazine seat 42. When the connecting assembly 50 is pulled, the bending of the flexible rod assembly 30 and the closing of the stapling mechanism 40 are realized simultaneously.

[0072] Specifically, Figure 3 As shown in the figure, the anvil 41 is connected to the connecting component 50 at a fixed connection node 55; when the connecting component 50 pulls the anvil 41 toward the rigid tube 10, the anvil 41 will have a tendency to approach an angle of 180° with the connecting component 50 when the angle is less than 180° and gradually rotate, thereby closing the jaws between the anvil 41 and the nail magazine seat 42.

[0073] In a specific embodiment, Figure 6 and Figure 8 As shown, the handle assembly 20 includes a handle body 21 and a handle 22, the handle 22 is hinged to the handle body 21, and the other end of the connecting assembly 50 is connected to the handle 22, and the handle 22 is used to pull the connecting assembly 50. During operation, the operator pulls the handle 22, and the handle 22 rotates around the hinged end, and the part of the handle 22 that is a certain distance from the hinged end is displaced relative to the connecting assembly 50, thereby realizing the action of pulling the connecting assembly 50.

[0074] In a specific embodiment, Figure 6-Figure 8 As shown, the connection assembly 50 includes a traction belt 51, a reversing wheel 52, a transmission kit 53 and a flexible connector 54, one end of the traction belt 51 is nested in the handle 22, the other end of the traction belt 51 is nested in the transmission kit 53, the reversing wheel 52 is connected to the handle body 21, and the traction belt 51 rests in the wheel groove of the reversing wheel 52. During operation, the operator pulls the handle 22, the handle 22 pulls the traction belt 51, and then the traction belt 51 drives the transmission kit 53 to move, wherein the reversing wheel 52 is used to change the extension direction of the traction belt 51.

[0075] The transmission kit 53 passes through the first cavity 11 , and the center line of the transmission kit 53 is colinear with the center line of the flexible rod assembly 30 in the unbent state. The reversing wheel 52 can be used to redirect the pulling force applied to the handle 22 to the pulling force in the center line direction of the flexible rod assembly 30 .

[0076] In addition, the reversing wheel 52 is rotatably connected to the handle body 21 , so there is rolling friction when the traction belt 51 and the reversing wheel 52 move relative to each other, which reduces the friction force compared to the sliding friction.

[0077] One end of the flexible connector 54 is connected to the transmission kit 53, the flexible connector 54 passes through the first cavity 11, and the other end is connected to the stapling mechanism 40. The flexible connector 54 applies tension to the stapling mechanism 40 and the flexible rod assembly 30, and generates bending deformation as the flexible rod assembly 30 bends.

[0078] It should be noted that the stapler 1 also includes a cutting assembly 60, and the first driving member 62 in the cutting assembly 60 also extends in the direction of the first cavity 11 of the rigid tube 10, and the first driving member 62 is arranged inside the transmission sleeve. Inside the rigid tube 10, there are two movement modes, namely, the first driving member 62 drives the cutting tool 61, and the transmission assembly 53 pulls the flexible connecting member 54. By arranging the first driving member 62 inside the transmission sleeve, the two movement modes do not affect each other, thereby improving the density of the internal structure of the stapler 1.

[0079] In a specific embodiment, when the operator uses the stapler 1, the operator holds the handle body 21 and the grip 22, applies force to the grip 22, and the grip 22 rotates relative to the handle body 21. The traction belt 51 is pulled and moves with the handle 22, and then the traction belt 51 pulls the transmission kit 53 and the flexible connector 54. Under the pulling, the flexible connector 54 moves toward the first end of the rigid tube 10, and then pulls the ball joint 31, so that the multiple ball joints 31 gradually fit closely together. While the multiple ball joints 31 gradually fit together, each ball joint 31 rotates under the pressure of each other. The flexible rod assembly 30 composed of multiple ball joints 31 can achieve a bending effect with a large angle and a large bending radius; at the same time, the flexible connector 54 applies a pulling force to the nail support 41 in the direction of the rigid tube 10. Since the nail support 41 is hinged to the nail magazine seat 42, under the action of the pulling force, the nail support 41 closes in the direction of the nail magazine seat 42.

[0080] In a specific embodiment, Figure 7As shown, a step portion 314 is provided on the ball joint 31 close to the rigid tube 10, and a step matching portion 12 is provided on the second end of the rigid tube 10, and the step portion 314 is engaged with the step matching portion 12. By engaging the step portion 314 with the step matching portion 12, the first end of the flexible rod assembly 30 is abutted against the rigid tube 10, and when the connecting assembly 50 pulls the flexible rod assembly 30 toward the rigid tube 10, the first end of the flexible rod assembly 30 is fixed, so that the adjacent ball joints 31 are pressed tightly.

[0081] In a specific embodiment, the flexible rod assembly 30 is configured as a snake tube, and the connecting assembly 50 drives the snake tube to bend.

[0082] Specifically, part of the side wall of the snake bone tube is a continuous surface, and the other part of the side wall is a surface with gaps in the length direction. The connecting component 50 is connected to one end of the snake bone tube. The connecting component 50 is pulled toward the other end of the snake bone tube, and the gap on the side wall of the snake bone tube gradually becomes smaller, and the snake bone tube bends inward toward the side with the gap.

[0083] In a specific embodiment, the flexible rod assembly 30 is configured as a spring shaft, the connecting assembly 50 is connected to one end of the spring shaft, and there is a certain gap between the connecting assembly 50 and the center line of the spring shaft. The connecting assembly 50 is pulled toward the other end of the spring shaft, and the side of the spring shaft close to the connecting assembly 50 is contracted, and the side of the spring shaft away from the connecting assembly 50 will be stretched and transformed into a state of bending inward toward the contracted side.

[0084] The foregoing descriptions of specific exemplary embodiments of the present application have been presented for purposes of illustration and description.

[0085] These descriptions are not intended to limit the present application to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present application and its practical application, so that those skilled in the art can realize and utilize the various exemplary embodiments and various selections and changes of the present application. The scope of the present application is intended to be limited by the claims and their equivalents.

Claims

1. A stapler, characterized in that: include: A rigid tube and a handle assembly, wherein a first end of the rigid tube is connected to the handle assembly, and the rigid tube has a first cavity opened along a length direction; a flexible rod assembly, a first end of the flexible rod assembly connected to a second end of the rigid tube; a stapling mechanism connected to the second end of the flexible rod assembly; A connecting assembly, wherein the connecting assembly passes through the first cavity, one end of the connecting assembly is connected to the flexible rod assembly, and the other end of the connecting assembly is connected to the handle assembly, and the handle assembly can apply a pulling force to the connecting assembly; When the handle assembly applies a pulling force to the connecting assembly, the connecting assembly drives the flexible rod assembly to bend, and the bending angle is proportional to the pulling force.

2. The stapler according to claim 1, characterized in that: The flexible rod assembly includes: a plurality of ball joints; A second cavity is provided in the ball joint, and the connecting assembly passes through the second cavity of each ball joint in sequence to connect all the ball joints; when working, two adjacent ball joints abut against each other; Under the pulling of the connecting assembly, two adjacent ball joints rotate relative to each other to bend the flexible rod assembly.

3. The stapler according to claim 2, characterized in that: The ball joint comprises: A spherical portion and a matching portion, wherein the spherical portion and the matching portion are respectively arranged at two ends of the ball joint; The matching portion of the ball joint is matched and connected with the spherical portion of the adjacent ball joint, and the spherical portion can rotate in the matching portion.

4. The stapler according to claim 3, characterized in that: The matching portion comprises: A supporting wall, wherein the supporting wall encloses a space with an opening, and an arc surface structure is provided along the wall thickness direction of the supporting wall, wherein the arc surface structure cooperates with the adjacent spherical portion, and the adjacent spherical portion can abut against the arc surface structure.

5. The stapler according to claim 1, characterized in that: The stapling mechanism comprises: An anvil and a nail magazine seat, wherein the anvil is fixedly connected to one end of the connecting assembly, and the anvil and the nail magazine seat are hinged; When the connecting assembly is pulled toward the first end of the rigid tube, the connecting assembly drives the nail support seat to close toward the nail magazine seat.

6. The stapler according to claim 1, characterized in that: The handle assembly comprises: A handle body and a grip, wherein the grip is hinged to the handle body; The other end of the connecting assembly is connected to the handle, and the handle is used to pull the connecting assembly.

7. The stapler according to claim 6, characterized in that: The connection component comprises: a traction belt, one end of which is nested in the handle; A reversing wheel, the reversing wheel is rotatably connected to the handle body, and the traction belt abuts against a wheel groove of the reversing wheel; A transmission kit, wherein the transmission kit passes through the first cavity, the center line of the transmission kit is colinear with the center line of the flexible rod assembly in an unbent state, and the other end of the traction belt is embedded in the transmission kit; A flexible connector, one end of which is connected to the transmission kit, and the other end of which is connected to the stapling mechanism.

8. The stapler according to claim 1, characterized in that: Also includes: A cutting assembly, the cutting assembly comprising a first driving member and a cutting tool; The flexible rod assembly comprises: The third cavity is opened inside the flexible rod assembly, the cutting tool passes through each of the third cavities in sequence, and the first driving member is used to drive the cutting tool to move from the third cavity to the stapling mechanism.

9. The stapler according to claim 2, characterized in that: A step portion is arranged on the ball joint close to the rigid tube, and a step matching portion is arranged on the second end of the rigid tube, and the step portion and the step matching portion are engaged with each other.

10. The stapler according to claim 1, characterized in that: The flexible rod assembly is configured as a snake tube; Or the flexible rod assembly is configured as a spring flexible shaft.

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