CN116138952A - Iris hook scissors - Google Patents

Abstract

The invention provides iris hooking scissors, which belong to the technical field of ophthalmic surgical medical instruments and comprise a first shearing assembly and a second shearing assembly, wherein the first shearing assembly is provided with 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 is provided with a first cutting edge, the bending angle of the first cutting edge relative to the first extension rod is an acute angle, the top end of the first shearing end is provided with a hooking part, the hooking part is arranged outside a cutting edge working area, and the hooking part extends towards the direction vertical to the first extension rod; the second shearing assembly is provided with a second extension rod, the top end of the second extension rod is bent to form a second shearing end, and a second cutting edge is arranged on the outer side of the second shearing end. The iris hook scissors provided by the invention can not generate larger elastic deformation on the iris when shearing is performed, and can ensure that the iris is always supported on the hooking part and cannot fall off when shearing is completed, so that the difficulty of iris separation is simplified, and the operation efficiency is improved.

Description

Iris hook scissors

Technical Field

The invention relates to the technical field of ophthalmic surgical medical instruments, in particular to an iris hook shear.

Background

Iris adhesions are seen in a number of ophthalmic conditions, such as ocular trauma, iritis, post-congenital cataract extraction, etc., where the adherent iris is usually separated intact during surgery to form the anterior chamber or the pupillary margin. The iris adhesion separation operation belongs to one operation difficulty in the ophthalmic operation, and the reason is as follows: 1. the iris operation is required to be performed in the anterior chamber of the eye, the central depth of the anterior chamber is only about 2mm-3mm, the operation space is extremely narrow, the surgical instruments which can be accommodated are limited, and meanwhile, in order to reduce the injury, the anterior chamber pressure is ensured, and the operation incision is usually only 2mm-3mm, so that the operation angle is smaller and the difficulty is greater; 2. the iris tissue has abundant blood vessels and is easy to bleed, the stimulation to the iris tissue is required to be reduced as much as possible when the separation operation is carried out, and meanwhile, the iris is very easy to damage important structures such as the lens, the inner side surface of the cornea and the like, so that more serious complications are caused.

The existing iris surgical instrument needs to hold an iris drag hook to pull up an adhered iris during operation, and the other hand is sheared off by an intraocular scissors, so that the problem of inconvenience of two-hand operation is solved, the instrument combining a hooking part and a shearing part is generated at the present stage, but the following problems exist: after the iris is hooked by the hooking part, the iris is easy to fall off in the shearing process, and the iris needs to be hooked again, so that the shearing efficiency is reduced.

Disclosure of Invention

Therefore, the invention aims to overcome the defects that in the prior art, the iris is easy to fall off and the shearing efficiency is reduced in the process of picking and shearing the iris, thereby providing the iris hooking scissors.

In order to solve the technical problem, the present invention provides an iris hook shear, comprising:

the first shearing assembly is provided with a first extension rod, the top end of the first extension rod is bent to form a first shearing end, a first cutting edge is arranged on the inner side of the first shearing end, and the bending angle of the first cutting edge relative to the first extension rod is an acute angle;

the second shearing assembly is provided with a second extension rod, the top end of the second extension rod is bent to form a second shearing end, and a second cutting edge matched with the first cutting edge is arranged on the outer side of the second shearing end;

the second shearing assembly is in sliding connection with the first shearing assembly along the direction of the first extension rod, so that the first cutting edge and the second cutting edge are matched for shearing, a cutting edge working area is formed between the first cutting edge and the second cutting edge, a hooking part is arranged at the top end of the first shearing end, the hooking part is arranged outside the cutting edge working area, and the hooking part extends towards the direction perpendicular to the first extension rod.

Preferably, the hooking part and the first blade of the first shearing end are in smooth transition connection.

Preferably, the hooking part has a rounded tip for hooking the iris.

Preferably, a supporting member is arranged at a side of the first blade close to the second blade at intervals, the interval between the supporting member and the first blade is suitable for penetrating through the second blade, and one end of the supporting member is connected to one side of the hooking part.

Preferably, an included angle between the first blade and the first extension rod is a, an included angle between the second blade and the second extension rod is b, a is 75±5°, b is 65±5°, and a > b.

Preferably, the tail end of the first extension rod of the first shearing assembly is a handheld end, the tail end of the second extension rod of the second shearing assembly is a driving end, the driving end is in relative sliding connection with the handheld end, and the relative sliding of the second shearing assembly and the first shearing assembly is realized by driving the driving end.

Preferably, a first reset elastic piece is arranged between the handheld end and the driving end, and the first reset elastic piece has an elastic force for driving the first shearing assembly and the second shearing assembly to reset towards the separating direction.

Preferably, the hand-held end is provided with an opening limiting component for controlling the opening of the blade working area.

Preferably, the side wall of the hand-held end is provided with a limiting hole;

the spacing subassembly of aperture has two at least groups, includes: the blocking assembly and the clamping piece are used for fixing the blocking assembly in a sliding mode after the blocking assembly penetrates through the limiting hole, and the blocking assembly is used for blocking a reset path of the driving end.

Preferably, the blocking component is provided with a second reset elastic piece, and after the clamping piece is separated from the blocking component, the second reset elastic piece drives the blocking component to reset.

The technical scheme of the invention has the following advantages:

1. according to the iris hook scissors provided by the invention, as the first cutting edge on the first shearing end and the second cutting edge on the second shearing end are bent at an acute angle, the hooking part extends towards the direction perpendicular to the first extension rod outside the working area of the cutting edge, and the first cutting edge and the hooking part form a certain angle, the iris can be conveniently hooked, the iris at the front part of the iris which is not sheared is prevented from being pierced and torn in the forward advancing process, the iris right in front of the hooking part is prevented from being undesirably broken and damaged, the hooking part can slide forward along the iris more easily, and the operation efficiency is further improved. When the iris is sheared once, the iris can be supported on the hooking part all the time, the problem of falling off can not occur, and the difficulty of iris separation is simplified.

2. The hooking part is in smooth transition connection with the first blade of the first shearing end, the elasticity of the iris is not damaged, the hooking part moves on the iris more smoothly through smooth transition, the resistance of the iris in sliding is reduced, and the operation effect is better.

3. The hooking part provided by the invention is a smooth tip for hooking the iris, so that the iris is hooked more easily and surrounding tissues are not damaged.

4. According to the iris cutting device, the supporting pieces are arranged at intervals on one side of the first cutting edge, which is close to the second cutting edge, the intervals between the supporting pieces and the first cutting edge are suitable for penetrating through the second cutting edge, one end of each supporting piece is connected to one side of the hooking part, the iris is hooked by the hooking part, meanwhile, the iris target cutting part is supported by the supporting pieces, the elastic and smooth iris is prevented from being attached to the side wall cutting surface of the first cutting end, slipping is caused when cutting action is carried out, good iris azimuth state conditions are provided for cutting, and the cutting effect is improved.

5. The included angle between the first cutting edge and the first extension rod is a, the included angle between the first cutting edge and the first extension rod is 75+/-5 degrees, the included angle between the second cutting edge and the second extension rod is b, the included angle between the second cutting edge and the second extension rod is 65+/-5 degrees, the angle a is larger than the angle b, the first cutting end is enabled to be in contact with the iris more naturally, in the process that the second cutting end advances to cut, the second cutting edge and the first cutting edge form a certain included angle, the intersection point of the first cutting edge and the second cutting edge gradually moves towards the tail end of the cutting edge, the cutting effect that only forward pushing actions but scissors are the same can be achieved, the cutting quality is improved, meanwhile, the influence on surrounding tissues is reduced due to unexpected movement or rotation of the second cutting end in other directions in the eye, the iris is not excessively cut, the controllability is good, and the iris is further guaranteed not to drop in the cutting process.

6. The tail end of the first extension rod of the first shearing assembly is a handheld end, the tail end of the second extension rod of the second shearing assembly is a driving end, the driving end is in relative sliding connection with the handheld end, and the driving end moves to realize relative sliding of the second shearing assembly and the first shearing assembly, so that the structure is simple and the operation is convenient.

7. The first reset elastic piece is arranged between the handheld end and the driving end and has elastic force for driving the first shearing assembly and the second shearing assembly to reset towards the separating direction, namely, after one shearing action, the second shearing assembly is not required to be reset manually, and the first reset elastic piece automatically resets under the action of the first reset elastic piece, so that the shearing efficiency and the shearing accuracy are improved.

8. The hand-held end provided by the invention is provided with the opening limiting assembly for controlling the opening of the working area of the cutting edge, the opening limiting assembly comprises the blocking assembly and the clamping piece, and after the blocking assembly passes through the limiting hole arranged on the side wall of the hand-held end, the clamping piece slides to fix the blocking assembly, namely, the blocking assembly blocks the reset path of the driving end. After hooking the iris, the blocking component passes through the limiting hole to perform blocking, so that damage to the internal tissues of the eyeball caused by overlarge opening and closing amplitude in the shearing process is prevented, the stability of operation is further improved by shearing in a small range, and medical staff selects the opening size suitable for self operation according to own operation habit, so that the operation effect is further ensured.

9. The blocking component provided by the invention is provided with the second reset elastic piece, after the clamping piece is separated from the blocking component, the blocking component is driven to reset by the second reset elastic piece, the blocking component is automatically reset under the action of the second reset elastic piece, the opening limit of the working area of the cutting edge is cancelled, manual independent operation is not needed, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the structure of one embodiment of iris hook scissors provided in an example of the present invention;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 3 is a schematic view of the first shear assembly of FIG. 1;

FIG. 4 is a schematic view of the second shear assembly of FIG. 1;

FIG. 5 is a schematic top view of the structure of FIG. 1;

FIG. 6 is a schematic cross-sectional view of the opening stop assembly of FIG. 1;

FIG. 7 is a schematic cross-sectional view of B-B of FIG. 6;

FIG. 8 is a schematic structural view of the fastening member shown in FIG. 6;

fig. 9 is a schematic diagram of the relationship between the iris and the iris when the present embodiment is operated.

Reference numerals illustrate:

1. a first shear assembly; 2. a first extension rod; 3. a first shear end; 4. a first blade; 5. a second shear assembly; 6. a second extension rod; 7. a second shear end; 8. a second blade; 9. a blade working area; 10. a hooking part; 11. a support; 12. a hand-held end; 13. a driving end; 14. a first return elastic member; 15. an opening limiting assembly; 16. a limiting hole; 17. a blocking assembly; 18. a clamping piece; 19. a second return elastic member; 20. a handle; 21. an operation hole; 22. an avoidance groove; 23. a housing; 24. a mounting hole; 25. a pressing part; 26. a push rod; 27. a sliding sleeve; 28. a third return spring; 29. a fixed rod; 30. a clamping groove; 31. a sliding surface; 32. and a fourth return spring.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

The iris hook scissors provided by the embodiment are used for iris adhesion separation operation.

As shown in fig. 1 to 4, a specific implementation manner of the iris hook scissors provided in this embodiment includes a first shearing assembly 1 and a second shearing assembly 5, where the first shearing assembly 1 has a first extension rod 2, a top end of the first extension rod 2 is bent to form a first shearing end 3, a first cutting edge 4 is provided at an inner side of the first shearing end 3, and a bending angle of the first cutting edge 4 relative to the first extension rod 2 is an acute angle; the second shearing assembly 5 is provided with a second extension rod 6, the top end of the second extension rod 6 is bent to form a second shearing end 7, and a second cutting edge 8 matched with the first cutting edge 4 is arranged on the outer side of the second shearing end 7; the second shearing assembly 5 is in sliding connection with the first shearing assembly 1 along the direction of the first extension rod 2, so that the first cutting edge 4 and the second cutting edge 8 are matched to conduct shearing, a cutting edge working area 9 is arranged between the first cutting edge 4 and the second cutting edge 8, a hooking part 10 is arranged at the top end of the first shearing end 3, the hooking part 10 is arranged outside the cutting edge working area 9, and the hooking part 10 extends towards the direction perpendicular to the first extension rod 2.

The first cutting edge 4 on the first shearing end 3 and the second cutting edge 8 on the second shearing end 7 are bent at an acute angle, so that after one side edge of the iris is hooked by the hooking part, the edge of the iris can naturally extend towards the cutting edge working area 9 between the first cutting edge 4 and the second cutting edge 8, and meanwhile, the hooking part 10 extends towards the direction perpendicular to the first extension rod 2, so that the hooking part 10 can conveniently hook and slide forward along the iris more easily, unexpected fracture damage is prevented, and the operation efficiency is further improved. In addition, as an alternative embodiment, the first shearing module 1 and the second shearing module 5 may be arranged to slide in a hinged manner so as to achieve a shearing fit between the first blade 4 and the second blade 8.

As shown in fig. 3 and 5, in the iris hook scissors provided in this embodiment, the hooking portion 10 is in smooth transition connection with the first blade 4 of the first cutting end 3. The elasticity of the iris is not destroyed by smooth transition, so that the hooking part 10 can move on the iris more smoothly, the resistance of the iris during sliding is reduced, and the operation effect is better. In addition, as an alternative embodiment, the hooking portion 10 and the first blade 4 of the first shearing end 3 may be connected by another connection, for example, an edge transition.

As shown in fig. 5, in the iris hooking scissors provided in this embodiment, the hooking portion 10 has a rounded tip for hooking the iris, so that the iris is hooked more easily without damaging surrounding tissues. The hooking portion 10 may have a rounded trapezoid structure with a narrow end and a wide end, and alternatively, the hooking portion 10 may have another structure, for example, a circular arc structure with the same width at both ends.

As shown in fig. 5, in the iris hook scissors provided in this embodiment, a supporting member 11 is disposed at a side of the first blade 4 close to the second blade 8 at intervals, the interval between the supporting member 11 and the first blade 4 is adapted to pass through the second blade 8, and one end of the supporting member 11 is connected to one side of the hooking portion 10. The iris target shearing part is supported by the supporting piece 11 while the iris is hooked by the hooking part 10, so that the iris is prevented from being attached to the shearing surface of the first shearing end 3, good iris azimuth state conditions are provided for shearing, and the shearing effect is improved. In addition, as an alternative embodiment, the other end of the supporting member 11 may be connected to the first cutting end 3, and the closed space between the supporting member 11 and the first cutting edge 4 may pass through the second cutting edge 8 to perform the cutting action.

As shown in fig. 1, in the iris hook scissors provided in this embodiment, an included angle between the first blade 4 and the first extension rod 2 is a, an included angle between the second blade 8 and the second extension rod 6 is b, where a is 75±5°, and b is 65±5°. The angle a is more than 65 degrees, the angle a is more than b, the first cutting edge 3 is more naturally contacted with the iris, a certain included angle is formed between the second cutting edge 8 and the first cutting edge 4 in the process of forward cutting of the second cutting edge 7, the junction point of the second cutting edge 8 and the first cutting edge gradually moves towards the tail end of the cutting edge, the shearing effect like scissors can be achieved only through forward pushing, the horizontal transverse operation in the eye is reduced while the shearing quality is higher than that of the shearing quality of the parallel arrangement, the influence on surrounding tissues is reduced, excessive iris shearing is avoided, and the iris is further prevented from falling in the shearing process.

As shown in fig. 3 and fig. 4, in the iris hook scissors provided in this embodiment, the end of the first extension rod 2 of the first shearing assembly 1 is a handheld end 12, the end of the second extension rod 6 of the second shearing assembly 5 is a driving end 13, the driving end 13 is slidably connected with the handheld end 12, and the relative sliding between the second shearing assembly 5 and the first shearing assembly 1 is realized by driving the driving end 13. Simple structure and convenient operation. In order to realize the operation to the drive end 13, can be provided with the handle 20 in handheld end 12 both sides, be provided with operation hole 21 on the drive end 13, when using, hook handle 20 through two fingers, another finger stretches into in the operation hole 21, removes operation hole 21, has realized the removal of second shearing module 5 promptly, and is simple and convenient, can realize getting and shearing the hook of iris by one hand, is provided with on the handheld end 12 and is used for dodging the groove 22 of dodging operation hole 21.

As shown in fig. 6, in the iris hook scissors provided in this embodiment, a first reset elastic element 14 is disposed between the hand-held end 12 and the driving end 13, and the first reset elastic element 14 has an elastic force for driving the first shearing assembly 1 and the second shearing assembly 5 to reset in a direction of separating. Namely, after one shearing action, the second shearing assembly is not required to be reset manually, and the second shearing assembly is automatically reset under the action of the first reset elastic piece, so that the shearing efficiency and the shearing accuracy are improved. The first return elastic member 14 may be a spring or other elastic member having an elastic force.

As shown in fig. 6, in the iris hook scissors provided in this embodiment, the hand-hold end 12 is provided with an opening limiting component 15 for controlling the opening of the blade working area 9. The damage to the tissues in the eyeball caused by overlarge opening and closing amplitude in the shearing process is prevented, the operation stability can be improved, and medical staff can select the opening suitable for the operation according to the operation habit of the medical staff, so that the operation effect is further ensured.

As shown in fig. 6 to 8, in the iris hook scissors provided in the present embodiment, a limiting hole 16 is provided on a side wall of the hand-held end 12; the opening limiting assembly 15 has at least two groups, including: the blocking assembly 17 and the clamping piece 18, after the blocking assembly 17 passes through the limiting hole 16, the clamping piece 18 slides to fix the blocking assembly 17, and the blocking assembly 17 blocks the reset path of the driving end 13. After the iris is hooked, the blocking component 17 passes through the limiting hole 16 to perform blocking function, so that damage to surrounding tissues caused by overlarge resetting amplitude of the second shearing end 7 is avoided, and the operation stability is further improved due to shearing in a small range. The blocking component 17 is provided with a second reset elastic piece 19, and after the clamping piece 18 is separated from the blocking component 17, the second reset elastic piece 19 drives the blocking component 17 to reset. The blocking component 17 automatically resets under the action of the second resetting elastic piece 19, the opening limit of the blade working area 9 is cancelled, manual independent operation is not needed, and the working efficiency is improved. The second return elastic member 19 may be a spring or other elastic member having an elastic force.

The opening limiting assembly 15 further comprises a casing 23, mounting holes 24 are formed in the outer side wall of the casing 23, the mounting holes 24 correspond to the limiting holes 16 one by one, one end of the blocking assembly 17 penetrates through the mounting holes 24 and then is arranged in the casing 23, and the blocking assembly 17 can move along the axis direction of the mounting holes 24. The plurality of sets of opening limiting assemblies 15 may be provided with a plurality of housings 23, or may share one housing 23.

The structure of the blocking assembly 17 may be configured to: the blocking assembly 17 comprises a pressing part 25, a pushing rod 26, a sliding sleeve 27 and a third reset spring 28, one end of the pushing rod 26 passes through the mounting hole 24 and then is connected with the pressing part 25, the pressing part 25 is arranged outside the mounting hole 24, the sliding sleeve 27 is sleeved on the other end of the pushing rod 26, the third reset spring 28 is arranged in the sliding sleeve 27, two ends of the third reset spring 28 are respectively connected with the bottom surface of the sliding sleeve 27 and the pushing rod 26, the second reset elastic piece 19 is arranged on the bottom surface of the pressing part 25, the second reset elastic piece 19 provides reset elastic force for the pressing part 25, the pushing rod 26 is provided with a fixing rod 29, when the pressing part 25 is manually pressed down, the fixing rod 29 falls into a clamping groove 30, the clamping groove 30 fixes the fixing rod 29 and the pushing rod 26, so that the sliding sleeve 27 is abutted to the side wall of the driving end 13, the sliding of the driving end 13 is not influenced, the cutting edge working area 9 is still kept in the maximum state after the initial state before an operation is realized, the first hooking operation is convenient, the driving end is moved when the first shearing action is performed, after the sliding sleeve 27 is separated from the sliding sleeve 28, the third reset elastic piece 19 provides reset elastic force for the pushing the sliding sleeve, the driving end is realized, the sliding sleeve is stretched out of the driving end, the driving end is prevented from being suddenly and the driving end is stretched out, the elastic path is greatly influenced by the vibration path is formed, and the vibration is prevented from the driving end is stretched out, and the driving end is driven.

As shown in fig. 8, the structure of the clamping member 18 may be configured as an integral structure, the clamping member 18 is slidably disposed in the casing 23, the moving direction of the clamping member 18 is perpendicular to the moving direction of the blocking assembly 17, the clamping member 18 has a clamping slot 30 corresponding to the fixing rod 29, wherein when one group of blocking assemblies 17 blocks, the fixing rod 29 on the blocking assembly 17 is fixed by the clamping slot 30 corresponding to the blocking assembly, and meanwhile, other fixing rods 29 are separated from the corresponding clamping slots 30; the side wall of the clamping groove 30 is provided with a sliding surface 31 which is obliquely arranged and matched with the fixed rod 29, the fixed rod 29 moves to push the sliding surface 31 to move so that the fixed rod 29 enters the clamping groove 30, the bottom surface of the clamping piece 18 is provided with a fourth reset spring 32, and the clamping piece 18 is driven to reset after moving.

The working process of the opening limiting assembly 15 comprises the following steps: the pressing part 25 suitable for an operator is pressed before an operation, the fixing rod 29 moves to be in contact with the sliding surface 31 in the pressing process, when the movement is continued, the sliding surface 31 is pushed to move downwards, then the fixing rod 29 falls into the clamping groove 30, under the action of the fourth reset spring 32, the clamping piece 18 has a trend of moving upwards, the fixing part is mutually restricted with the fixing rod 29, at the moment, the third reset spring 28 is compressed by the pushing rod 26, the end part of the sliding sleeve 27 is abutted with the side wall of the driving end 13 under the action of the third reset spring 28, when the driving end 13 is not operated, the second shearing end 7 is far away from the first shearing end 3, the maximum opening state is achieved, the iris is conveniently hooked by the hooking part 10, after the iris is hooked, the driving end 13 is pushed to move by the operation hole 21 to be sheared, the sliding sleeve 27 is ejected out under the action of the third reset spring 28, the driving end 13 is stretched to the lower side of the driving end 13, the reset path of the driving end 13 is blocked, and the opening limiting is completed;

when the pressing part 25 of the other group of blocking components 17 is pressed down, the fixed rod 29 on the blocking component 17 and the corresponding sliding surface 31 are matched to move, when the sliding surface 31 is moved downwards, the fixed rod 29 on the originally fixed blocking component 17 is separated from the corresponding clamping groove 30, the blocking component 17 is reset under the action of the second reset elastic piece 19, the blocking component 17 does not block the driving end 13 any more, and meanwhile, the newly pressed blocking component 17 stretches out to perform blocking work;

when the opening limit of the opening limit unit 15 is to be released, the opening limit can be released by releasing the pressing portions 25 only by pressing any pressing portion 25 that is not pressed down and moving the corresponding fixing lever 29 to the edge of the sliding surface 31, and all the pressing portions 25 can be lifted.

The working process of the iris hook scissors comprises the following steps: as shown in fig. 9, when the iris adhesion separation operation is performed, the iris hook is used in an inverted manner, the iris is hooked through the hooking part 10, the hooking part 10 is moved, the iris is moved to the blade working area 9, then the driving end 13 is moved, so that the shearing cooperation of the second blade 8 and the first blade 4 is realized, the shearing of the iris is completed, then the hooking part 10 is moved, the shearing of the next part is performed, the operation is simple, the hooking and shearing of the iris are completed through one instrument, the functions of pulling and shearing can be realized by one hand, and the iris separation difficulty is simplified.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (10)

1. An iris hook shear, comprising:

the first shearing assembly (1) is provided with a first extension rod (2), the top end of the first extension rod (2) is bent to form a first shearing end (3), a first cutting edge (4) is arranged on the inner side of the first shearing end (3), and the bending angle of the first cutting edge (4) relative to the first extension rod (2) is an acute angle;

the second shearing assembly (5) is provided with a second extension rod (6), the top end of the second extension rod (6) is bent to form a second shearing end (7), and a second cutting edge (8) matched with the first cutting edge (4) is arranged on the outer side of the second shearing end (7);

the second shearing assembly (5) is in sliding connection with the first shearing assembly (1) along the direction of the first extension rod (2), so that the first cutting edge (4) and the second cutting edge (8) are matched to shear, a cutting edge working area (9) is arranged between the first cutting edge (4) and the second cutting edge (8), a hooking part (10) is arranged at the top end of the first shearing end (3), the hooking part (10) is arranged outside the cutting edge working area (9), and the hooking part (10) extends towards the direction perpendicular to the first extension rod (2).

2. Iris hook scissors according to claim 1, characterized in that the hooking portion (10) and the first blade (4) of the first cutting end (3) are in a rounded transition.

3. Iris hook scissors according to claim 1, characterized in that the hooking portion (10) has a rounded tip for hooking the iris.

4. Iris hook scissors according to claim 1, characterized in that a support (11) is arranged at a distance from the side of the first blade (4) close to the second blade (8), the distance between the support (11) and the first blade (4) is adapted to pass through the second blade (8), and one end of the support (11) is connected to the side of the hooking portion (10).

5. Iris hook scissors according to claim 1, characterized in that the angle between the first blade (4) and the first extension bar (2) is a, the angle between the second blade (8) and the second extension bar (6) is b, the angle a is 75±5°, the angle b is 65±5°, the angle a > b.

6. Iris hook scissors according to any of claims 1-5, wherein the end of the first extension rod (2) of the first shearing assembly (1) is a hand-held end (12), the end of the second extension rod (6) of the second shearing assembly (5) is a driving end (13), the driving end (13) and the hand-held end (12) are in relative sliding connection, and the relative sliding of the second shearing assembly (5) and the first shearing assembly (1) is realized by driving the driving end (13).

7. Iris hook shears according to claim 6, wherein a first return elastic member (14) is provided between the hand-held end (12) and the driving end (13), the first return elastic member (14) having an elastic force for driving the first and second shearing assemblies (1, 5) to return toward the separated direction.

8. Iris hook scissors according to claim 6, characterized in that the hand-held end (12) is provided with an opening limiting component (15) for controlling the opening of the blade working area (9).

9. Iris hook scissors according to claim 8, characterized in that the side wall of the hand-held end (12) is provided with a limiting hole (16);

the opening limiting assembly (15) is provided with at least two groups, and comprises: the blocking assembly (17) and the clamping piece (18), after the blocking assembly (17) passes through the limiting hole (16), the clamping piece (18) slides to fix the blocking assembly (17), and the blocking assembly (17) blocks the reset path of the driving end (13).

10. Iris hook scissors according to claim 9, characterized in that the blocking component (17) is provided with a second reset elastic piece (19), and the second reset elastic piece (19) drives the blocking component (17) to reset after the clamping piece (18) is separated from the blocking component (17).

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