A surgical scissors controlled under laparoscope

Abstract

The present invention relates to the field of surgical scissors, and in particular to a pair of surgical scissors controlled under laparoscopy, comprising a scissor head, a scissor rod and a scissor handle connected in sequence; wherein the scissor rod comprises: a rigid chain, a rigid sleeve and a push rod, the rigid chain maintains itself in a straight posture through a pull rope that runs through itself and is tightened by an elastic retractor, the rigid sleeve can slide along the length direction of the rigid chain, and the push rod can push out a push bender at the front end of the rigid sleeve, and the push bender is used to push the rigid chain. The doctor can push the movable sleeve to the target depth, and then manipulate the push rod to make the push bender extend a predetermined length at the target position, so that the rigid chain is bent at a predetermined angle at the joint of the target link, thereby conveniently adjusting the bending position and bending angle of the scissor rod, and improving the flexibility and accuracy of the operation.

Description

Technical Field

[0001] The invention relates to the field of surgical scissors, and in particular to a pair of surgical scissors controlled under laparoscope. Background Art

[0002] In laparoscopic surgery, traditional surgical scissors are difficult to flexibly enter the narrow part of the ureter for delicate cutting operations due to their rigid structure. This limitation not only increases the difficulty of the operation, but may also prolong the operation time and increase the risk to the patient. Therefore, there is an urgent need for a ureteral surgical scissors that can be flexibly operated in laparoscopic surgery to improve the accuracy and efficiency of the operation and reduce damage to the patient.

[0003] In response to this demand, flexible surgical scissors came into being. This type of surgical scissors can adjust the angle according to the needs of the operation, thereby bypassing some organs and directly reaching the narrow part of the ureter for operation, which can reduce invasive damage to patients and improve the success rate and safety of the operation.

[0004] However, traditional bendable surgical scissors have a complex structure and are difficult to maintain and disinfect. In particular, dirt and germs are easily accumulated in the bent part of the scissor rod, increasing the risk of infection. In addition, the scissor rod can only be bent at one hub, which lacks flexibility. Summary of the invention

[0005] The purpose of the present invention is to provide a surgical scissors controlled under laparoscope, so as to solve the problem that the scissor rods of traditional surgical scissors can only be bent at one hinge and have insufficient flexibility.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A pair of surgical scissors controlled under laparoscopy, comprising a scissor head, a scissor rod and a scissor handle connected in sequence; wherein the scissor rod comprises: a flexible sleeve, one end of which is abutted against the scissor handle, and the other end is abutted against the scissor head, and the flexible sleeve can be bent freely; a rigid chain, arranged in the flexible sleeve, the rigid chain comprises a plurality of chain links hinged in sequence, the chain links can and can only be bent in the same direction, and one end of the rigid chain is aligned and abutted against the end of the scissor handle, and the other end is aligned and abutted against the scissor head; a pull rope, one end of the pull rope is fixedly connected to the chain link on the rigid chain close to one end of the scissor head, and the other end passes through all the chain links along the length direction of the rigid chain and extends to the scissor handle; an elastic retractor is arranged in the cavity of the scissor handle, and is fixedly connected to the scissor handle and one end of the pull rope passing through the rigid chain, and the elastic retractor always applies traction to the pull rope The chain links at both ends of the rigid chain are pulled closer to each other, thereby keeping the rigid chain in a straight posture; a rigid sleeve is arranged on the back of the direction in which the rigid chain can be bent along the length direction of the rigid chain, and is constrained between the flexible sleeve and the rigid chain, and one end of the rigid sleeve can slide along the surface of the scissors handle and extend out of the end of the flexible sleeve; a push rod is slidably arranged inside the rigid sleeve, one end of the push rod can extend out of the rigid sleeve in the direction of the scissors handle, and the other end is connected to a top bender, which can be contracted in the rigid sleeve, and a top bending part is arranged at the joint of each of the chain links, and the top bender has an elastic force that naturally bends in the same direction as the bending direction of the rigid chain, so that the top bender can abut and push the top bending part to move, so that the rigid chain bends at the joint of the chain link abutted by the top bender.

[0008] Furthermore, a spring sheet is provided on the side of the rigid sleeve facing the rigid chain, and the spring sheet is in a shape of a minor arc protruding toward the rigid chain. The spring sheet can be clamped in the middle by the top bending parts of two adjacent chain links, and when the spring sheet is subjected to force, it can elastically deform toward the inside of the rigid sleeve to avoid the top bending part, so that the rigid sleeve does not move along the length direction of the rigid chain when no external force is applied, and the rigid sleeve can move along the length direction of the rigid chain when an external force is applied.

[0009] Furthermore, the push rod is a round rod, the outer peripheral surface of the push rod is provided with an external thread, the end of the push rod close to the scissors handle is coaxially connected with a knob, the push rod and the top bender are rotatably coaxially connected, and the push rod and the top bender can move axially synchronously, and the push rod is threadedly connected to the rigid sleeve.

[0010] Furthermore, the rigid sleeve includes: an inner prismatic tube, which has a prismatic hole extending through the length direction, and is used to slideably connect the top bender and prevent the top bender from rotating; an internal threaded tube, which is spirally connected to the push rod, so that the push rod moves along its own axial direction when it rotates; wherein the inner prismatic tube and the internal threaded tube are coaxially connected, the inner prismatic tube is close to the scissors head, and the internal threaded tube is close to the scissors handle.

[0011] Furthermore, a plurality of force reducing grooves are provided on the side of the top bender facing away from the rigid chain.

[0012] Furthermore, the chain link includes: a chain plate; a chain pin vertically and fixedly connected to a corner of the chain plate; a shoulder arranged at a corner of the chain plate; an axial hole vertically penetrating through a corner of the chain plate and used to connect the chain pin of another chain link; a shoulder groove arranged at a corner of the chain plate and used to insert the shoulder of another chain link; wherein the chain pin and the shoulder groove are located at two corners of the same side of the chain plate, and the axial hole and the shoulder are arranged on opposite sides of the chain plate having the chain pin and the shoulder groove.

[0013] Furthermore, the chain plate has a corner of the shoulder groove extending outward to form a top bend, and the top bender has a groove matching the top bend at one end facing the rigid chain.

[0014] Furthermore, the elastic puller includes: a sliding rod, which can be slidably connected to the scissors handle along the length direction of the rigid chain, one end of which is fixedly connected to the end of the pull rope close to the scissors handle, and the other end is arranged at the end of the scissors handle away from the rigid chain; a spring, one end of which is fixedly connected to the scissors handle, and the other end is fixedly connected to the end of the sliding rod away from the rigid chain, so that the sliding rod applies a force to the pull rope to cause the rigid chain to contract inward to be tightened.

[0015] Furthermore, the scissors head includes a fixed blade head and a movable blade head, the scissors handle includes a fixed blade handle and a movable blade handle, the fixed blade head and the fixed blade handle are respectively fixedly connected to the two ends of the rigid chain, the movable blade head is rotatably connected to the fixed blade head, the movable blade handle is rotatably or slidably connected to the fixed blade handle, and the movable blade head and the movable blade handle are connected via an operating part, so that the user can open and close the movable blade head by operating the movable blade handle.

[0016] Furthermore, the fixed blade head and the movable blade head are connected via a rotating shaft, an elastic member is installed between the fixed blade head and the movable blade head, the elastic member is used to provide elastic force for the fixed blade head and the movable blade head to open or close the two, the fixed blade handle and the movable blade handle are connected via a slide rail, and the movable blade handle applies a reaction force to the movable blade head via the operating part to overcome the elastic force of the elastic member, so that the scissors head can be operated to perform an opening and closing action.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] Provided are surgical scissors controlled under laparoscopy. The doctor can push a movable sleeve to an appropriate depth according to the needs of the operation, and then manipulate the push rod to make the push bender extend a predetermined length at the target position, so that the rigid chain is bent at a predetermined angle at the joint of the target chain link, thereby conveniently adjusting the bending position and bending angle of the scissor rod, thereby improving the flexibility and accuracy of the operation. At the same time, the rigid chain can maintain a straight posture under the action of an elastic retractor, thereby ensuring the stability of the scissors during operation and avoiding force transmission loss caused by bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 A three-dimensional diagram of an embodiment of the present invention;

[0021] Figure 2 A three-dimensional diagram of the internal structure of an embodiment of the present invention;

[0022] Figure 3 An exploded view of an embodiment of the present invention;

[0023] Figure 4 A top view of an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Cross-sectional view in the AA direction;

[0025] Figure 6 An exploded view of a rigid chain according to an embodiment of the present invention;

[0026] The numbers in the figure represent the following:

[0027] 1-scissor head; 11-fixed blade head; 12-movable blade head; 13-rotating shaft; 14-elastic member; 2-scissor lever; 21-chain link; 211-chain plate; 212-chain pin; 213-shoulder; 214-axial hole; 215-shoulder groove; 216-top bending part; 22-pull rope; 23-elastic puller; 231-sliding rod; 232-spring; 24-rigid sleeve; 241-inner prismatic tube; 242-inner threaded tube; 25-thrust rod; 251-knob; 26-top bending device; 261-groove; 262-force reducing groove; 27-flexible sleeve; 3-scissor handle; 31-fixed blade handle; 32-movable blade handle; 33-slide rail; 4-operating part. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The structure of conventional bendable surgical scissors is relatively complex, and the maintenance and disinfection of the surgical scissors are relatively difficult, especially in the bent portion of the scissor rod 2 where dirt and germs are easily accumulated, increasing the risk of infection. In addition, the scissor rod 2 can only be bent at one pivot, and lacks flexibility.

[0030] In order to solve the above problems, this embodiment provides a pair of surgical scissors controlled under laparoscopy.

[0031] Figure 1 A stereoscopic image of surgical scissors was shown. Figure 2 The internal structure of surgical scissors was shown. Figure 3 An exploded view of surgical scissors was shown, combined with Figure 1 , Figure 2 , Figure 3 The surgical scissors include a scissor head 1, a scissor rod 2 and a scissor handle 3 which are connected in sequence.

[0032] The scissor lever 2 includes a flexible sleeve 27 , a rigid chain, a pull rope 22 , an elastic retractor 23 , a rigid sleeve 24 and a top rod 25 .

[0033] One end of the flexible sleeve 27 abuts against the scissors handle 3, and the other end abuts against the scissors head 1, and the flexible sleeve 27 can be bent freely. The flexible sleeve 27 is used to shield the internal structure of the scissors rod 2, reduce the degree of contamination inside the scissors rod 2, and prevent the bending action of the scissors rod 2 from damaging the patient's tissue.

[0034] The rigid chain as the main body of the scissors rod 2 is arranged in the flexible sleeve 27. The rigid chain includes a plurality of chain links 21 hinged in sequence. The chain links 21 can and can only bend in the same direction. One end of the rigid chain is aligned and abutted with the end of the scissors handle 3, and the other end is aligned and abutted with the scissors head 1.

[0035] The pull rope 22 passes through all the links 21 along the length direction of the rigid chain. One end of the pull rope 22 is fixedly connected to the link 21 at one end of the rigid chain, and one end of the pull rope 22 passes through the link 21 at the other end of the rigid chain.

[0036] The elastic retractor 23 is arranged in the scissors handle 3 and fixedly connects the scissors handle 3 and one end of the pull rope 22 that passes through the rigid chain. The elastic retractor 23 has the elastic force to pull the pull rope 22 out from the inside of the rigid chain, so that the pull rope 22 always maintains the pulling force to pull the chain links 21 at both ends of the rigid chain closer to each other.

[0037] The pull rope 22 and the elastic retractor 23 work together to keep the rigid chain in a straight posture, thereby ensuring the stability of the surgical scissors during operation and avoiding force transmission loss caused by bending.

[0038] The rigid sleeve 24 is arranged at the back of the rigid chain along the length direction of the rigid chain in the direction in which the rigid chain can bend, and is constrained between the flexible sleeve 27 and the rigid chain, and one end of the rigid sleeve 24 can slide along the surface of the scissors handle 3 and extend out of the end of the flexible sleeve 27.

[0039] The push rod 25 is slidably arranged inside the rigid sleeve 24, one end of which can extend out of the rigid sleeve 24 in the direction of the scissors handle 3, and the other end is connected to a push bender 26, which can be gathered in the rigid sleeve 24, and a push bending portion 216 is arranged at the joint of each link 21. The push bender 26 has an elastic force that naturally bends in the same direction as the bending direction of the rigid chain, so that the push bender 26 can abut and push the push bending portion 216 to move, thereby causing the rigid chain to bend at the joint of the link 21 abutted by the push bender 26.

[0040] The rigid sleeve 24, the push rod 25 and the push bender 26 work together to bend the rigid chain to a target angle at a target position without affecting the stability of the rigid chain itself.

[0041] The following is a detailed description of the operation of the surgical scissors:

[0042] When it is necessary to bend at a certain joint, the rigid sleeve 24 is first manually moved from the end of the flexible sleeve 27 (above the scissors handle 3) so that the inner end of the rigid sleeve 24 is located at the corresponding joint, and then the push rod 25 is pushed inward, so that the top bender 26 at the inner end of the push rod 25 is pushed out of the rigid sleeve 24. When the constraint is released, the top bender 26 will automatically produce partial bending deformation in the same direction of the bending of the rigid chain (that is, the top bender 26 is in a partially bent state under normal circumstances), and the degree of deformation makes its end just align with the end of the top bending portion 216.

[0043] After the top bender 26 is aligned with the top bending portion 216, the push force inward continues to be applied to the top rod 25. The top bender 26 can continue to be bent under the action of external force, and then a bending force is generated on the chain link 21 through the top bender 26 and the top bending portion 216, thereby realizing the bending of any target position of the rigid chain.

[0044] In order to enable the top bender 26 to align with the top bending part 216 when being pushed out, the moving position of the end of the push rod 25 should be at least a distance of the top bender 26 from the end of the top bending part 216 at the joint to reserve the movement distance of the top bender 26 to be pushed out.

[0045] The initial position of the rigid sleeve 24 is preferably completely located within the flexible sleeve 27. Its rigidity also helps to maintain the stability of the rigid chain under normal conditions. When bending is required, it can be pulled outward.

[0046] In order to facilitate the operation of the rigid sleeve 24, an operating handle may be provided at the outer end of the rigid sleeve 24, and the operating handle cannot enter the flexible sleeve 27, and the operating handle is not shown in the figure.

[0047] The top bending portion 216 is preferably configured to have a certain curvature in the bending direction, so as to cooperate with the top bender 26 to better transmit the bending force.

[0048] Furthermore, since the channel formed between the inner wall of the flexible sleeve 27 and the rigid chain for the rigid sleeve 24 to move is flexible, it is difficult for the rigid sleeve 24 to always move along the length direction of the scissor rod 2. In order to ensure the correctness of the moving direction of the rigid sleeve 24, the rigid sleeve 24 is designed to be slidably connected to the stretched rigid chain. For example, a dovetail slider is provided on the side of the rigid sleeve 24 facing the rigid chain, and a dovetail groove is provided on the side of the rigid chain facing the rigid sleeve 24. Through the connection between the dovetail slider and the dovetail groove, the moving direction of the rigid sleeve 24 is constrained by the rigid chain. At the same time, the structural strength of the rigid chain can be enhanced by the rigid sleeve 24, thereby reducing the possibility of instrument damage during surgery.

[0049] In addition, the scissors head 1 includes a fixed blade head 11 and a movable blade head 12, and the scissors handle 3 includes a fixed blade handle 31 and a movable blade handle 32. The fixed blade head 11 and the fixed blade handle 31 are respectively fixedly connected to the two ends of the rigid chain, the movable blade head 12 is rotatably connected to the fixed blade head 11, and the movable blade handle 32 is rotatably or slidably connected to the fixed blade handle 31. The movable blade head 12 and the movable blade handle 32 are connected via an operating portion 4, so that the user can open and close the movable blade head 12 by operating the movable blade handle 32.

[0050] Specifically, the fixed blade head 11 and the movable blade head 12 are connected by a rotating shaft 13, and an elastic member 14 is installed between the fixed blade head 11 and the movable blade head 12. The elastic member 14 is preferably a torsion spring, and the torsion spring is used to provide elastic force for the fixed blade head 11 and the movable blade head 12 to open or close the two. The fixed blade handle 31 and the movable blade handle 32 are connected by a slide rail 33, and the movable blade handle 32 and the movable sleeve are connected by a traction rope. The traction rope is used to apply a reaction force to the movable blade head 12 to overcome the elastic force of the torsion spring, so that the scissors head 1 can perform an opening and closing action under the operation of the user.

[0051] The bending of the rigid chain at any position and angle does not affect the manipulation of the scissors handle 3 on the scissors head 1 .

[0052] Furthermore, Figure 4 A top view of surgical scissors is shown. Figure 5 The internal cross-section of the surgical scissors is shown, combined with Figure 4 , Figure 5 .

[0053] A reed 243 is provided on the side of the rigid sleeve 24 facing the rigid chain. The reed 243 is in the shape of a minor arc protruding toward the rigid chain. The reed 243 can be clamped in the middle by the top bends 216 of two adjacent chain links 21. When the reed 243 is subjected to force, it can elastically deform toward the inside of the rigid sleeve 24 to avoid the top bends 216, so that the rigid sleeve 24 does not move along the length direction of the rigid chain when there is no external force, and can move along the length direction of the rigid chain when there is an external force.

[0054] The width of the spring 243 is equal to the distance between two adjacent top bends 216, so that when the spring 243 is clamped by the top bends 216, the position of the rigid sleeve 24 inside the flexible sleeve 27 is fixed, and the doctor can judge whether the spring 243 is clamped by the two top bends 216 by the feel of pushing in or pulling out the rigid sleeve 24.

[0055] Furthermore, a scale may be provided on the outside of the rigid sleeve 24 , so that the doctor can judge the bending position of the rigid chain by visually observing the scale of the rigid sleeve 24 exposed outside the flexible sleeve 27 .

[0056] The elastic puller 23 can be any elastic structure that can make the pull rope straight, such as a spring, a rubber rope, a tensioner, etc. The present embodiment preferably adopts the following embodiment, and the elastic puller 23 includes: a sliding rod 231 and a spring 232.

[0057] The sliding rod 231 is connected to the fixed knife handle 31, and the sliding rod 231 can slide along the length direction of the rigid chain. One end of the sliding rod 231 is fixedly connected to the end of the pull rope 22 close to the scissors handle 3, and the other end of the sliding rod 231 is arranged at the end of the scissors handle 3 away from the rigid chain.

[0058] One end of the spring 232 is fixedly connected to the fixed knife handle 31, and the other end of the spring 232 is fixedly connected to one end of the sliding rod 231 away from the rigid chain. The spring 232 is used to apply an elastic force to the sliding rod 231 away from the rigid chain, so that the sliding rod 231 generates a pulling rope 22, and then the rope 22 generates a force to contract the rigid chain inward to tighten it.

[0059] The rigid sleeve 24 includes an inner prismatic tube 241 and an inner threaded tube 242 , wherein the inner prismatic tube 241 and the inner threaded tube 242 are coaxially connected, the inner prismatic tube 241 is close to the scissors head 1 , and the inner threaded tube 242 is close to the scissors handle 3 .

[0060] The inner prism tube 241 has a prism hole that penetrates the inner prism tube 241 along the length direction, which is used for sliding connection with the top bender 26 and preventing the top bender 26 from rotating.

[0061] The push rod 25 is a round rod, and an outer peripheral surface of the push rod 25 is provided with an external thread. The internal thread tube 242 is screwed to the push rod 25, so that the push rod 25 moves in a screw direction along its own axis when rotating.

[0062] The push rod 25 and the top bender 26 are rotatably connected via a revolving pair, so that the spiral movement of the push rod 25 can drive the top bender 26 to move axially, but the spiral movement of the push rod 25 cannot drive the top bender 26 to rotate.

[0063] The end of the push rod 25 close to the scissors handle 3 is coaxially connected with a knob 251. When the operator rotates the knob 251, the push rod 25 spirals forward or backward, and the top bender 26 moves axially accordingly, completing the action of extending from the inside of the rigid sleeve 24 to push the top bending part 216 to move, or completing the action of retracting into the inside of the rigid sleeve 24.

[0064] Furthermore, Figure 6 The assembly diagram of the rigid chain is shown, combined with Figure 6 The chain link 21 includes a chain plate 211 , a chain pin 212 , a shoulder 213 , an axis hole 214 , and a shoulder groove 215 .

[0065] The chain pin 212 is vertically and fixedly connected to a corner of the chain plate 211, the shoulder 213 is set at the corner of the chain plate 211, the shaft hole 214 vertically passes through the corner of the chain plate 211, and the shaft hole 214 is used to connect the chain pin 212; the shoulder groove 215 is set at a corner of the chain plate 211, and the shoulder groove 215 is used to insert the shoulder 213.

[0066] Among them, the chain pin 212 and the shoulder groove 215 are located at the two corners of the same side of the chain plate 211, the shaft hole 214 and the shoulder 213 are arranged on the opposite sides of the chain plate 211 having the chain pin 212 and the shoulder groove 215, the chain pin 212 and the shaft hole 214 are located at the two corners of the same side of the chain plate 211, and the shoulder 213 and the shoulder groove 215 are located at the two corners of the same side of the chain plate 211.

[0067] The principle of the rigid chain is: one chain plate 211 is connected to the shaft hole 214 of another chain plate 211 through the chain pin 212, so that the two chain plates 211 can rotate relative to each other. When the shoulder 213 of one chain plate 211 is inserted into the shoulder groove 215 of the other chain plate 211, the two chain plates 211 cannot rotate. At this time, the two chain links 21 form a rigid chain that can only bend in one direction.

[0068] When the top bender 26 drives a top bending part 216 to move, the rigid chain bends at the position of the top bending part 216. At this time, the pull rope 22 is stretched, so that the sliding rod 231 is pulled by the pull rope 22 to move toward the rigid chain, and the spring 232 is compressed. Due to the elastic force of the spring 232, the parts other than the bent part of the rigid chain remain straight, and the bent part of the rigid chain always generates a reaction force on the top bender 26, so that the bending angle of the rigid chain remains unchanged.

[0069] Preferably, there are two chain plates 211 , and the two chain plates 211 are parallel and symmetrical to each other, and the shoulder groove 215 and the shoulder 213 are both arranged between the two chain plates 211 .

[0070] Preferably, in order to facilitate the top bender 26 to bend the rigid chain, the chain plate 211 has a shoulder groove 215 with one corner extending outward to form a top bending portion 216, and the end of the top bender 26 facing the outside of the rigid sleeve 24 has a groove 261 that matches the top bending portion 216. After the top bending portion 216 and the groove 261 match, when the chain plate 211 performs a rotational motion, the top bender 26 is difficult to separate from the chain plate 211.

[0071] In addition, a plurality of force reducing grooves 262 are provided on the side of the top bender 26 facing away from the rigid chain. The force reducing grooves 262 are used to reduce the difficulty of bending the top bender 26 toward the rigid chain, so that the top bender 26 is easier to bend under the action of its own elastic force after extending out of the rigid sleeve 24.

[0072] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A surgical scissors controlled under laparoscope, characterized in that: It comprises a scissor head (1), a scissor rod (2) and a scissor handle (3) which are connected in sequence; Wherein, the scissor lever (2) comprises: A flexible sleeve (27), one end of which abuts against the scissors handle (3) and the other end of which abuts against the scissors head (1), and the flexible sleeve (27) can be bent freely; a rigid chain, arranged in the flexible sleeve (27), the rigid chain comprising a plurality of chain links (21) hinged in sequence, the chain links (21) being able to and only being able to bend in the same direction, and one end of the rigid chain being aligned and abutted against an end of the scissors handle (3), and the other end being aligned and abutted against the scissors head (1); a pull rope (22), one end of the pull rope (22) being fixedly connected to the chain link (21) on the rigid chain near one end of the scissors head (1), and the other end of the pull rope (22) passing through all the chain links (21) along the length direction of the rigid chain and extending to the scissors handle (3); An elastic puller (23) is disposed in the cavity of the scissors handle (3) and is fixedly connected to the scissors handle (3) and one end of the pull rope (22) passing through the rigid chain. The elastic puller (23) always applies a pulling force to the pull rope (22) to pull the chain links (21) at both ends of the rigid chain closer to each other, thereby keeping the rigid chain in a straight position; A rigid sleeve (24) is arranged along the length direction of the rigid chain at the back of the rigid chain in the direction in which the rigid chain can be bent, and is constrained between the flexible sleeve (27) and the rigid chain, and one end of the rigid sleeve (24) can slide along the surface of the scissors handle (3) and extend out of the end of the flexible sleeve (27); A push rod (25) is slidably arranged inside the rigid sleeve (24); one end of the push rod (25) can extend out of the rigid sleeve (24) in the direction of the scissors handle (3); the other end is connected to a push bender (26); the push bender (26) can be gathered inside the rigid sleeve (24); a push bending portion (216) is arranged at the joint of each of the chain links (21); the push bender (26) has an elastic force that naturally bends in the same direction as the bending direction of the rigid chain, so that the push bender (26) can abut against and push the push bending portion (216) to move, thereby causing the rigid chain to bend at the joint of the chain link (21) abutted by the push bender (26).

2. The laparoscopically controlled surgical scissors according to claim 1, characterized in that: A leaf spring (243) is provided on one side of the rigid sleeve (24) facing the rigid chain. The leaf spring (243) is in the shape of a minor arc protruding toward the rigid chain. The leaf spring (243) can be clamped in the middle by the top bends (216) of two adjacent chain links (21). When a force is applied to the leaf spring (243), the leaf spring (243) can elastically deform toward the inside of the rigid sleeve (24) to avoid the top bends (216), so that the rigid sleeve (24) does not move along the length direction of the rigid chain when no external force is applied, and can move along the length direction of the rigid chain when an external force is applied.

3. The laparoscopically controlled surgical scissors according to claim 1, characterized in that: The push rod (25) is a round rod, and an outer peripheral surface of the push rod (25) is provided with an external thread. One end of the push rod (25) close to the scissors handle (3) is coaxially connected to a knob (251). The push rod (25) and the top bender (26) are rotatably coaxially connected, and the push rod (25) and the top bender (26) can move axially synchronously. The push rod (25) is threadedly connected to the rigid sleeve (24).

4. The laparoscopically controlled surgical scissors according to claim 3, characterized in that: The rigid sleeve (24) comprises: The inner prism tube (241) is provided with a prism hole penetrating along the length direction, and is used for slidably connecting the top bender (26) and preventing the top bender (26) from rotating; The internal threaded cylinder (242) is spirally connected to the push rod (25), so that the push rod (25) moves along its own axis when rotating; wherein the internal prismatic cylinder (241) and the internal threaded cylinder (242) are coaxially connected, the internal prismatic cylinder (241) is close to the scissors head (1), and the internal threaded cylinder (242) is close to the scissors handle (3).

5. The laparoscopically controlled surgical scissors according to claim 4, characterized in that: A plurality of force reducing grooves (262) are provided on the side of the top bender (26) facing away from the rigid chain.

6. The laparoscopically controlled surgical scissors according to claim 1, characterized in that: The chain link (21) comprises: Chain plate (211); A chain pin (212) is vertically and fixedly connected to a corner of the chain plate (211); A shoulder (213) is provided at a corner of the chain plate (211); An axial hole (214) vertically passes through a corner of the chain plate (211) and is used to connect the chain pin (212) of another chain link (21); A shoulder groove (215) is provided at a corner of the chain plate (211) and is used for inserting the shoulder (213) of another chain link (21); The chain pin (212) and the shoulder groove (215) are located at two corners of the same side of the chain plate (211), and the shaft hole (214) and the shoulder (213) are arranged on opposite sides of the chain plate (211) having the chain pin (212) and the shoulder groove (215).

7. The laparoscopically controlled surgical scissors according to claim 6, characterized in that: The link plate (211) has a corner of the shoulder groove (215) extending outward to form a top bend (216), and the top bend (26) has a groove (261) that matches the top bend (216) at one end facing the rigid chain.

8. The laparoscopically controlled surgical scissors according to claim 1, characterized in that: The elastic retractor (23) comprises: A sliding rod (231) is slidably connected to the scissors handle (3) along the length direction of the rigid chain, one end of which is fixedly connected to an end of the pull rope (22) close to the scissors handle (3), and the other end of which is arranged at an end of the scissors handle (3) away from the rigid chain; A spring (232) has one end fixedly connected to the scissors handle (3) and the other end fixedly connected to an end of the sliding rod (231) away from the rigid chain, so that a force is applied to the pull rope (22) through the sliding rod (231) to cause the rigid chain to contract inwardly and be tightened.

9. A laparoscopically controlled surgical scissors according to any one of claims 1 to 8, characterized in that: The scissor head (1) comprises a fixed blade head (11) and a movable blade head (12); the scissor handle (3) comprises a fixed blade handle (31) and a movable blade handle (32); the fixed blade head (11) and the fixed blade handle (31) are respectively fixedly connected to two ends of the rigid chain; the movable blade head (12) is rotatably connected to the fixed blade head (11); the movable blade handle (32) is rotatably or slidably connected to the fixed blade handle (31); the movable blade head (12) and the movable blade handle (32) are connected via an operating portion (4), so that a user can open and close the movable blade head (12) by operating the movable blade handle (32).

10. The laparoscopically controlled surgical scissors according to claim 9, characterized in that: The fixed blade head (11) and the movable blade head (12) are connected via a rotating shaft (13); an elastic member (14) is installed between the fixed blade head (11) and the movable blade head (12); the elastic member (14) is used to provide an elastic force for the fixed blade head (11) and the movable blade head (12) to open or close the fixed blade head (11) and the movable blade head (12); the fixed blade handle (31) and the movable blade handle (32) are connected via a slide rail (33); the movable blade handle (32) applies a reaction force to the movable blade head (12) through the operating portion (4) to overcome the elastic force of the elastic member (14), so that the scissors head (1) can be operated to perform an opening and closing action.

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