An iris hook scissor

Abstract

This invention provides an iris hook scissor, belonging to the field of ophthalmic surgical medical device technology. It includes a first cutting component and a second cutting component. The first cutting component has a first extension rod, the top of which is bent to form a first cutting end. The inner side of the first cutting end has a first blade, and the bending angle of the first blade relative to the first extension rod is an acute angle. The top of the first cutting end has a hook portion located outside the working area of ​​the blade, extending in a direction perpendicular to the first extension rod. The second cutting component has a second extension rod, the top of which is bent to form a second cutting end, and the outer side of the second cutting end has a second blade. The iris hook scissor provided by this invention does not cause significant elastic deformation of the iris during cutting. After cutting the iris, it ensures that the iris remains supported on the hook portion, preventing detachment and simplifying iris separation, thus improving surgical efficiency.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic surgical medical device technology, specifically to an iris hook scissor. Background Technology

[0002] Iris adhesions are common in many ophthalmic conditions, such as ocular trauma, iritis, and post-congenital cataract extraction. Surgery typically requires complete separation of the adhered iris to create the anterior chamber or pupillary margin. Iris adhesion separation surgery is considered a challenging procedure in ophthalmology for the following reasons: 1. Iris surgery must be performed in the anterior chamber, which is only about 2-3 mm deep in the center. The operating space is extremely limited, restricting the number of surgical instruments that can be accommodated. Furthermore, to minimize damage and maintain anterior chamber pressure, the surgical incision is usually only 2-3 mm, further reducing the operating angle and increasing the difficulty; 2. The iris tissue is richly vascularized and prone to bleeding. During separation, stimulation must be minimized. Additionally, the iris is adjacent to important structures such as the lens and the inner surface of the cornea, making it highly susceptible to damage and potentially leading to more serious complications.

[0003] Existing iris surgery instruments require one hand to hold an iris retractor to pull up the adhered iris while the other hand uses intraocular scissors to cut it. To solve the inconvenience of two-handed operation, instruments that combine the hooking and cutting parts have been developed. However, the following problems exist: after the hooking part hooks the iris, the iris is prone to detaching during the cutting process, requiring re-hooking and reducing the efficiency of the cutting. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art where the iris is easily detached during the iris hooking and cutting process, which reduces the cutting efficiency, thereby providing an iris hook cutter.

[0005] To solve the above-mentioned technical problems, the present invention provides an iris hook cutter, comprising:

[0006] The first shearing assembly has a first extension rod, the top end of the first extension rod is bent to form a first shearing end, the inner side of the first shearing end has a first blade, and the bending angle of the first blade relative to the first extension rod is an acute angle.

[0007] The second shearing assembly has a second extension rod, the top end of which is bent to form a second shearing end, and the outer side of the second shearing end has a second cutting edge that cooperates with the first cutting edge.

[0008] The second shearing assembly is slidably connected to the first shearing assembly along the direction of the first extension rod, so that the first blade and the second blade cooperate to perform shearing. The area between the first blade and the second blade is the blade working area. The top end of the first shearing end has a hook portion, which is located outside the blade working area and extends in a direction perpendicular to the first extension rod.

[0009] Preferably, the hook portion and the first blade of the first cutting end are connected by a smooth transition.

[0010] Preferably, the hook portion has a smooth tip for hooking the iris.

[0011] Preferably, a support member is provided at a distance from the side of the first blade near the second blade, the distance between the support member and the first blade being adapted to allow the second blade to pass through, and one end of the support member is connected to one side of the hook portion.

[0012] Preferably, the angle between the first blade and the first extension rod is α, and the angle between the second blade and the second extension rod is β, wherein α is 75±5°, β is 65±5°, and α > β.

[0013] Preferably, the end of the first extension rod of the first shearing assembly is a handheld end, and the end of the second extension rod of the second shearing assembly is a driving end. The driving end and the handheld end are slidably connected relative to each other, and the relative sliding of the second shearing assembly and the first shearing assembly is achieved by driving the driving end.

[0014] Preferably, a first reset elastic element is provided between the handheld end and the driving end, the first reset elastic element having an elastic force that drives the first shearing component and the second shearing component to reset in the direction of separation.

[0015] Preferably, the handheld end has an opening limit component for controlling the opening size of the blade working area.

[0016] Preferably, the handheld end sidewall is provided with a limiting hole;

[0017] The opening limit component has at least two sets, including: a blocking component and a snap-fit ​​component. After the blocking component passes through the limiting hole, the snap-fit ​​component slides to fix the blocking component, and the blocking component blocks the reset path of the driving end.

[0018] Preferably, the blocking assembly has a second reset elastic element, and after the snap-fit ​​member is separated from the blocking assembly, the second reset elastic element drives the blocking assembly to reset.

[0019] The technical solution of this invention has the following advantages:

[0020] 1. The iris hook scissors provided by this invention, because the first blade on the first cutting end and the second blade on the second cutting end are both bent at acute angles, and the hooking part extends outside the working area of ​​the blades in a direction perpendicular to the first extension rod, with the first blade and the hooking part forming a certain angle, can conveniently hook the iris while preventing the hooking part from piercing or tearing the iris in front of it during forward movement, avoiding unwanted rupture damage to the iris directly in front of the hooking part. The hooking part can also slide forward more easily along the iris, further improving surgical efficiency. When a cutting action is completed on the iris, it can also ensure that the iris is always supported on the hooking part and will not fall off, simplifying the difficulty of iris separation.

[0021] 2. The hook portion and the first blade of the first cutting end provided by the present invention are connected by a smooth transition, which will not damage the elasticity of the iris. The smooth transition makes the movement of the hook portion on the iris smoother, reduces the resistance when the iris slides, and the surgical effect will be better.

[0022] 3. The hooking part provided by the present invention is a smooth tip for hooking the iris, which makes it easier to hook the iris and will not damage the surrounding tissue.

[0023] 4. The first cutting edge provided by the present invention has a support member spaced apart on the side near the second cutting edge. The distance between the support member and the first cutting edge is suitable for the second cutting edge to pass through. One end of the support member is connected to one side of the hooking part. While the hooking part hooks the iris, the support member supports the target cutting part of the iris, preventing the elastic and smooth iris from sticking to the side wall cutting surface of the first cutting end, which would cause slippage during the cutting action. This provides good iris orientation conditions for cutting and improves the cutting effect.

[0024] 5. The angle between the first blade and the first extension rod provided by the present invention is 'a', where 'a' is 75±5°, and the angle between the second blade and the second extension rod is 'b', where 'b' is 65±5°. 'a' is greater than 'b'. The setting of angle 'a' allows the first cutting end to contact the iris more naturally. During the forward cutting process of the second cutting end, the second blade and the first blade form a certain angle, and their intersection point gradually moves towards the end of the blade. This achieves a cutting effect similar to scissors with only a forward pushing motion, improving the cutting quality while reducing unwanted movement or rotation of the second cutting end in other directions within the eye, reducing the impact on surrounding tissues, and avoiding excessive cutting of the iris. It provides good control and further ensures that the iris will not fall off during the cutting process.

[0025] 6. The first extension rod of the first shearing component provided by the present invention has a handheld end at the end, and the second extension rod of the second shearing component has a driving end at the end. The driving end and the handheld end are slidably connected relative to each other. The movement of the driving end realizes the relative sliding of the second shearing component and the first shearing component. The structure is simple and the operation is convenient.

[0026] 7. The present invention provides a first reset elastic element between the handheld end and the driving end. The first reset elastic element has an elastic force that drives the first shearing component and the second shearing component to reset in the direction of separation. That is, after a shearing action, the second shearing component does not need to be manually reset. It is automatically reset under the action of the first reset elastic element, which improves the shearing efficiency and the accuracy of shearing.

[0027] 8. The present invention provides a handheld end with an opening limiting component for controlling the opening size of the blade working area. The opening limiting component includes a blocking component and a locking component. After the blocking component passes through a limiting hole provided on the side wall of the handheld end, the locking component slides to fix the blocking component, that is, the blocking component blocks the reset path of the driving end. After the iris is hooked, the blocking component passes through the limiting hole to block, preventing excessive opening and closing during the cutting process from damaging the internal tissues of the eyeball. The small-range cutting further improves the stability of the operation. Medical personnel can select the opening size suitable for their operation according to their own operating habits, further ensuring the surgical effect.

[0028] 9. The blocking component provided by the present invention has a second reset elastic element. After the snap-fit ​​component is separated from the blocking component, the second reset elastic element drives the blocking component to reset. The blocking component automatically resets under the action of the second reset elastic element, canceling the opening limit of the blade working area. No manual operation is required, which improves work efficiency. Attached Figure Description

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

[0030] Figure 1 This is a schematic diagram of one embodiment of the iris hook shear provided in the embodiments of the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0032] Figure 3 for Figure 1 A schematic diagram of the structure of the first shearing component;

[0033] Figure 4 for Figure 1 A schematic diagram of the structure of the second shearing component;

[0034] Figure 5 for Figure 1 A top-view structural diagram;

[0035] Figure 6 for Figure 1 A cross-sectional view of the center opening limit component;

[0036] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of BB;

[0037] Figure 8 for Figure 6 A structural diagram of the card connector;

[0038] Figure 9 This is a schematic diagram showing the positional relationship between the iris and the iris during operation in this embodiment.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. First shearing assembly; 2. First extension rod; 3. First shearing end; 4. First blade; 5. Second shearing assembly; 6. Second extension rod; 7. Second shearing end; 8. Second blade; 9. Blade working area; 10. Hook part; 11. Support member; 12. Handheld end; 13. Drive end; 14. First reset elastic member; 15. Opening limit assembly; 16. Limiting hole; 17. Blocking assembly; 18. Snap-fit ​​member; 19. Second reset elastic member; 20. Handle; 21. Operating hole; 22. Clearance groove; 23. Housing; 24. Mounting hole; 25. Pressing part; 26. Push rod; 27. Sliding sleeve; 28. Third reset spring; 29. ​​Fixing rod; 30. Snap-fit ​​groove; 31. Sliding surface; 32. Fourth reset spring. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] The iris hook scissors provided in this embodiment are used for iris adhesion separation surgery.

[0046] like Figures 1 to 4 The image shows a specific embodiment of the iris clipper provided in this example, comprising a first cutting component 1 and a second cutting component 5. The first cutting component 1 has a first extension rod 2, the top end of which is bent to form a first cutting end 3. The inner side of the first cutting end 3 has a first blade 4, and the bending angle of the first blade 4 relative to the first extension rod 2 is an acute angle. The second cutting component 5 has a second extension rod 6, the top end of which is bent to form a second cutting end 7. The outer side of the second cutting end 7 has a second blade 8 that cooperates with the first blade 4. The second cutting component 5 is slidably connected to the first cutting component 1 along the direction of the first extension rod 2, so that the first blade 4 and the second blade 8 cooperate to cut. The area between the first blade 4 and the second blade 8 is a blade working area 9. The top end of the first cutting end 3 has a hooking part 10, which is located outside the blade working area 9 and extends in a direction perpendicular to the first extension rod 2.

[0047] Both the first blade 4 on the first shearing end 3 and the second blade 8 on the second shearing end 7 are bent at acute angles. Therefore, when one side of the iris is hooked by the hooking part, the edge of the iris can naturally extend towards the blade working area 9 between the first blade 4 and the second blade 8. At the same time, the hooking part 10 extends in a direction perpendicular to the first extension rod 2, making it easier for the hooking part 10 to hook and slide forward along the iris, preventing unwanted rupture damage and further improving surgical efficiency. In addition, as an alternative embodiment, the first shearing assembly 1 and the second shearing assembly 5 can be configured to slide hingedly to achieve shearing engagement between the first blade 4 and the second blade 8.

[0048] like Figure 3 and Figure 5 As shown, in the iris hook scissors provided in this embodiment, the hook portion 10 and the first blade 4 of the first cutting end 3 are connected by a smooth transition. This smooth transition does not damage the elasticity of the iris, allowing the hook portion 10 to move more smoothly on the iris, reducing resistance during iris sliding, and resulting in better surgical outcomes. Alternatively, as an alternative implementation, the hook portion 10 and the first blade 4 of the first cutting end 3 can also be connected in other ways, such as with an edge transition.

[0049] like Figure 5 As shown, in the iris hook scissors provided in this embodiment, the hooking part 10 has a smooth tip for hooking the iris, making it easier to hook the iris without damaging surrounding tissue. The hooking part 10 can be a smooth trapezoidal structure that is narrow at one end and wide at the other. Alternatively, as an alternative embodiment, the hooking part 10 can also be other structures, such as an arc-shaped structure with the same width at both ends.

[0050] like Figure 5 As shown, in the iris hook shear provided in this embodiment, a support member 11 is provided at a distance from the side of the first blade 4 near the second blade 8. The distance between the support member 11 and the first blade 4 is suitable for the second blade 8 to pass through. One end of the support member 11 is connected to one side of the hooking part 10. While the hooking part 10 hooks the iris, the support member 11 supports the target cutting part of the iris, preventing the iris from adhering to the cutting surface of the first cutting end 3, providing good iris orientation conditions for cutting, and improving the cutting effect. In addition, as an alternative embodiment, the other end of the support member 11 can also be connected to the first cutting end 3, and the closed gap between the support member 11 and the first blade 4 can pass through the second blade 8 to achieve the cutting action.

[0051] like Figure 1As shown, in the iris hook scissors provided in this embodiment, the included angle between the first blade 4 and the first extension rod 2 is 'a', and the included angle between the second blade 8 and the second extension rod 6 is 'b'. 'a' is 75±5°, and 'b' is 65±5°. 'a' can be further set to 75°, and 'b' can be further set to 65°. Since 'a' is greater than 'b', the angle 'a' allows the first cutting end 3 to contact the iris more naturally. During the forward cutting process of the second cutting end 7, the second blade 8 and the first blade 4 form a certain angle, and their intersection point gradually moves towards the end of the blade. This achieves a cutting effect similar to scissors with only a forward pushing motion. This provides higher cutting quality than parallel settings, reduces horizontal manipulation within the eye, minimizes the impact on surrounding tissues, and avoids excessive cutting of the iris, further ensuring that the iris does not fall off during the cutting process.

[0052] like Figure 3 and Figure 4 As shown, in the iris hook and shear provided in this embodiment, the end of the first extension rod 2 of the first shearing component 1 is the handheld end 12, and the end of the second extension rod 6 of the second shearing component 5 is the driving end 13. The driving end 13 and the handheld end 12 are slidably connected relative to each other, and the relative sliding of the second shearing component 5 and the first shearing component 1 is achieved by driving the driving end 13. The structure is simple and the operation is convenient. In order to realize the operation of the driving end 13, handles 20 can be provided on both sides of the handheld end 12, and an operation hole 21 is provided on the driving end 13. When in use, two fingers hook the handles 20, and the other finger is inserted into the operation hole 21. Moving the operation hole 21 realizes the movement of the second shearing component 5. It is simple and convenient, and the hooking and shearing of the iris can be achieved with one hand. The handheld end 12 is provided with a clearance groove 22 for avoiding the operation hole 21.

[0053] like Figure 6 As shown, in the iris clipper provided in this embodiment, a first reset elastic element 14 is provided between the handheld end 12 and the driving end 13. The first reset elastic element 14 has an elastic force that drives the first cutting assembly 1 and the second cutting assembly 5 to reset in the direction of separation. That is, after one cutting action, the second cutting assembly does not need to be manually reset; it automatically resets under the action of the first reset elastic element, improving cutting efficiency and cutting accuracy. The first reset elastic element 14 can be a spring or other elastic element with elastic force.

[0054] like Figure 6 As shown, in the iris hook scissors provided in this embodiment, the handheld end 12 has an opening limit component 15 for controlling the opening size of the blade working area 9. This prevents excessive opening and closing during the cutting process from damaging the internal tissues of the eyeball and also improves the stability of the operation. Medical personnel can select the opening size suitable for their own operation according to their operating habits, further ensuring the surgical effect.

[0055] like Figures 6 to 8 As shown, in the iris hook scissors provided in this embodiment, a limiting hole 16 is provided on the side wall of the handheld end 12; the opening limiting component 15 has at least two sets, including: a blocking component 17 and a snap-fit ​​component 18. After the blocking component 17 passes through the limiting hole 16, the snap-fit ​​component 18 slides to fix the blocking component 17, and the blocking component 17 blocks the reset path of the driving end 13. After hooking the iris, the blocking component 17 passes through the limiting hole 16 to block, avoiding excessive reset amplitude of the second cutting end 7 and causing damage to surrounding tissues. The small-range cutting further improves the stability of the operation. The blocking component 17 has a second reset elastic element 19. After the snap-fit ​​component 18 separates from the blocking component 17, the second reset elastic element 19 drives the blocking component 17 to reset. The blocking component 17 automatically resets under the action of the second reset elastic element 19, canceling the opening limit on the blade working area 9, eliminating the need for manual operation and improving work efficiency. The second reset elastic element 19 can be a spring or other elastic element with elastic force.

[0056] The opening limit assembly 15 also includes a housing 23. The outer wall of the housing 23 has mounting holes 24, which correspond one-to-one with the limiting holes 16. One end of a blocking assembly 17 passes through the mounting hole 24 and is disposed within the housing 23. The blocking assembly 17 is movable along the axial direction of the mounting hole 24. Multiple opening limit assemblies 15 can have multiple housings 23, or they can share a single housing 23.

[0057] The structure of the blocking assembly 17 can be configured as follows: The blocking assembly 17 includes a pressing part 25, a pushing rod 26, a sliding sleeve 27, and a third return spring 28. One end of the pushing rod 26 passes through the mounting hole 24 and is connected to the pressing part 25. The pressing part 25 is located outside the mounting hole 24. The sliding sleeve 27 is sleeved on the other end of the pushing rod 26. The third return spring 28 is located in the sliding sleeve 27, and its two ends are connected to the bottom surface of the sliding sleeve 27 and the pushing rod 26, respectively. A second return elastic element 19 is located on the bottom surface of the pressing part 25 and provides a return elastic force to the pressing part 25. A fixing rod 29 is provided on the pushing rod 26. When the pressing part 25 is pressed manually, the fixing rod 29 falls into the locking groove 30. 30. Fixing the fixing rod 29 and the pushing rod 26 ensures that the sliding sleeve 27 abuts against the side wall of the driving end 13, without affecting the sliding of the driving end 13. It also ensures that the blade working area 9 remains at its maximum opening after the initial opening limit is set before surgery, facilitating the first hooking. When performing the first cutting action, the driving end 13 moves away from the sliding sleeve 27. Under the action of the third return spring 28, the sliding sleeve 27 pops out and extends into the return path of the driving end 13, completing the opening limit. The sliding sleeve 27 can be an elastic sleeve, which has a certain buffering effect, preventing it from suddenly popping out when it extends into the return path and causing large vibrations, which would affect the surgical process and ensure the stability of the operation.

[0058] like Figure 8 As shown, the structure of the snap-fit ​​component 18 can be configured as an integral structure. The snap-fit ​​component 18 is slidably disposed in the housing 23. The moving direction of the snap-fit ​​component 18 is perpendicular to the moving direction of the blocking assembly 17. The snap-fit ​​component 18 has a snap-fit ​​groove 30 corresponding to the fixing rod 29. When one group of the blocking assemblies 17 blocks, the snap-fit ​​groove 30 corresponding to it fixes the fixing rod 29 on the blocking assembly 17, while the other fixing rods 29 disengage from the corresponding snap-fit ​​groove 30. The side wall of the snap-fit ​​groove 30 has an inclined sliding surface 31 that cooperates with the fixing rod 29. The movement of the fixing rod 29 pushes the sliding surface 31 to move so that the fixing rod 29 enters the snap-fit ​​groove 30. A fourth return spring 32 is provided on the bottom surface of the snap-fit ​​component 18, which drives the snap-fit ​​component 18 to return to its original position after it moves.

[0059] The working process of the opening limit component 15: Before surgery, the operator presses the appropriate pressing part 25. During the pressing process, the fixing rod 29 moves and contacts the sliding surface 31. When it continues to move, it pushes the sliding surface 31 downward. Then, the fixing rod 29 falls into the locking groove 30. Under the action of the fourth return spring 32, the locking piece 18 has an upward tendency to move, which restrains the fixing rod 29 to achieve fixation. At this time, the third return spring 28 is compressed by the pushing rod 26. Under the action of the third return spring 28, the sliding piece 18 will... The end of the moving sleeve 27 abuts against the side wall of the driving end 13. When the driving end 13 is not operated, the second shearing end 7 is far away from the first shearing end 3, which is the maximum opening state, making it convenient to hook the iris with the hooking part 10. After the iris is hooked, the driving end 13 is pushed to move through the operating hole 21 to perform shearing. When the driving end 13 is pushed away, the sliding sleeve 27 is popped out under the action of the third return spring 28 and extends below the driving end 13 to block the return path of the driving end 13, thus completing the opening limit.

[0060] When the pressing part 25 of another set of blocking components 17 is pressed, the fixed rod 29 on the blocking component 17 moves in cooperation with its corresponding sliding surface 31. When the sliding surface 31 is moved downward, the fixed rod 29 on the previously fixed blocking component 17 disengages from the corresponding snap-fit ​​groove 30. Under the action of the second reset elastic member 19, the blocking component 17 is reset, and this blocking component 17 no longer blocks the drive end 13. At the same time, the newly pressed blocking component 17 extends to perform blocking work.

[0061] When it is necessary to release the opening limit of the opening limit component 15, simply press any unpressed pressing part 25 so that its corresponding fixing rod 29 moves to the edge of the sliding surface 31, and then release the pressing part 25 to release the opening limit and raise all pressing parts 25.

[0062] The iris clipper operation process is as follows: Figure 9 As shown, during iris adhesion separation surgery, the iris hook scissors are used upside down. The iris is hooked by the hooking part 10. The hooking part 10 is moved to move the iris to the blade working area 9. Then the driving end 13 is moved to achieve the cutting cooperation between the second blade 8 and the first blade 4 to complete the cutting of the iris. Then the hooking part 10 is moved to cut the next part. The operation is simple. The hooking and cutting of the iris can be completed by using one instrument. The pulling and cutting functions can be achieved simultaneously with one hand, simplifying the difficulty of iris separation.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An iris hook shear, characterized in that, include: The first shearing assembly (1) has a first extension rod (2), the top end of the first extension rod (2) is bent to form a first shearing end (3), the inner side of the first shearing end (3) has a first blade (4), the bending angle of the first blade (4) relative to the first extension rod (2) is an acute angle, and the included angle between the first blade (4) and the first extension rod (2) is a, where a is 75±5°; The second shearing assembly (5) has a second extension rod (6), the top end of the second extension rod (6) is bent to form a second shearing end (7), the outer side of the second shearing end (7) has a second blade (8) that cooperates with the first blade (4), the included angle between the second blade (8) and the second extension rod (6) is b, the b is 65±5°, and the a>b; The second shearing assembly (5) is slidably connected to the first shearing assembly (1) along the direction of the first extension rod (2), so that the first blade (4) and the second blade (8) cooperate to perform shearing. The area between the first blade (4) and the second blade (8) is the blade working area (9). The top end of the first shearing end (3) has a hook portion (10), which is located outside the blade working area (9). The hook portion (10) extends from the top end of the first shearing end (3) away from the first extension rod (2) in a direction perpendicular to the first extension rod (2). The hook portion (10) and the first blade of the first shearing end (3) The blades (4) are connected by a smooth transition. A support member (11) is provided at intervals on the side of the first blade (4) near the second blade (8). The support member (11) is disposed opposite to the first blade (4). The interval between the support member (11) and the first blade (4) is suitable for passing through the second blade (8). One end of the support member (11) is connected to one side of the hooking part (10). While the hooking part (10) hooks the iris, the support member (11) supports the target cutting part of the iris. The hooking part (10) is suitable for sliding forward along the iris until the target cutting part of the iris moves to the working area (9) of the blade.

2. The iris hook shear according to claim 1, characterized in that, The hooking part (10) has a smooth tip for hooking the iris.

3. The iris hook shear according to any one of claims 1-2, characterized in that, The end of the first extension rod (2) of the first shearing component (1) is the handheld end (12), and the end of the second extension rod (6) of the second shearing component (5) is the driving end (13). The driving end (13) and the handheld end (12) are slidably connected to each other, and the relative sliding of the second shearing component (5) and the first shearing component (1) is achieved by driving the driving end (13).

4. The iris hook shear according to claim 3, characterized in that, A first reset elastic element (14) is provided between the handheld end (12) and the driving end (13). The first reset elastic element (14) has an elastic force that drives the first shearing component (1) and the second shearing component (5) to reset in the direction of separation.

5. The iris hook shear according to claim 3, characterized in that, The handheld end (12) has an opening limit component (15) for controlling the opening size of the blade working area (9).

6. The iris hook shear according to claim 5, characterized in that, The handheld end (12) has a limit hole (16) on its side wall; The opening limit component (15) has at least two sets, including: a blocking component (17) and a snap-fit ​​component (18). After the blocking component (17) passes through the limiting hole (16), the snap-fit ​​component (18) slides to fix the blocking component (17). The blocking component (17) blocks the reset path of the driving end (13).

7. The iris hook shear according to claim 6, characterized in that, The blocking component (17) has a second reset elastic element (19). After the snap-fit ​​member (18) is separated from the blocking component (17), the second reset elastic element (19) drives the blocking component (17) to reset.

Images