Lens puncture fixing device

Abstract

The invention relates to a lens puncture fixing device. The lens puncture fixing device comprises an outer tube unit, an inner core unit, a claw unit and an outer tube control unit. The intraocular lens puncture device has the advantages that the puncture function is achieved through relative movement of the outer tube unit and the inner core unit, the clamping and fixing function is achieved through relative movement of the claw unit and the inner core unit, a dislocated crystalline lens is fixed to a pupil area, and the situation that excessive cortex or nucleus fragments fall into a vitreous cavity in the excision process of a vitreous head is reduced; the puncture function and the clamping and fixing function are integrated, a double-stage fixing mode is achieved through one instrument, and the operation difficulty is lowered.

Description

[0001] This application is a divisional application of the application filed on August 18, 2025, with application number 202511151371.4 and entitled "A Lens Puncture Fixation Device". Technical Field

[0002] This invention relates to the field of ophthalmic microsurgical instruments, and in particular to a lens puncture and fixation device. Background Technology

[0003] In phacoemulsification and vitrectomy cataract surgery, lens fixation instruments mainly include three types: fork-shaped fixation heads, positioning hooks, and vitreous forceps. Among them: 1) The fork-type fixation head is controlled by a steel wire structure connected to the handle, which aims to improve the stability of lens fixation by maximizing clamping force and reduce the incidence of lens rotation during operation; 2) The adjustment hook has a blunt tip design, which can only be used to push the edge of the lens; 3) Vitreous forceps have straight or curved forceps tips for grasping lens tissue. However, existing technical solutions have the following systemic flaws in clinical applications: 1) Lack of fixation ability for dislocated lens: When the lens is dislocated posteriorly into the vitreous cavity, the adjustment hook, due to its blunt tip single-point contact design (the angle between the force direction and the tangent of the lens equator is <15°), can only push the edge and cannot form effective fixation; the straight / curved forceps of the vitreous forceps have insufficient opening angle, and the parallel clamping surface can only grasp the anterior capsule, making it difficult for the dislocated lens to be stabilized in the pupillary area, and it is easy to rotate or sink during the operation; 2) Mechanical design defects of the fixation interface: The fork-type fixation head, the adjustment hook and the vitreous forceps all have the problem of insufficient contact area between the instrument and the lens. Under the vibration of phacoemulsification or the impact of intraocular fluid flow, the lens is prone to rotation or slippage, which can lead to fragments falling into the vitreous cavity. 3) High risk of iatrogenic injury: Because existing instruments cannot effectively restrain the lens, fragments generated during the operation are prone to fall into the vitreous cavity, increasing the risk of vitreous inflammation and retinal damage. 4) Structural bottleneck of anchoring mechanism: The blunt tip design of the positioning hook and the parallel clamping surface of the vitreous forceps cannot penetrate the lens substance, and the fork-type fixation head can only achieve surface clamping, making it difficult to form substantial anchoring.

[0004] Currently, no effective solutions have been proposed for the problems existing in related technologies, such as the inability to effectively fix the lens, the lens being prone to rotation or slippage, and lens fragments falling into the vitreous cavity. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a lens puncture and fixation device to solve problems such as the inability to effectively fix the lens, the easy rotation or slippage of the lens, and the falling of lens fragments into the vitreous cavity.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A lens puncture and fixation device is provided, comprising: External tube unit; An inner core unit is movably connected to the outer tube unit and is used to move relative to the outer tube unit so that the distal end of the inner core unit extends into or out of the distal end of the outer tube unit. A claw unit is movably disposed at the distal end of the inner core unit, and is used to follow the relative movement between the inner core unit and the outer tube unit, and to switch between a puncture mode and a clamping mode when located outside the outer tube unit to perform puncture and clamping operations. An outer tube control unit is disposed between the outer tube unit and the inner core unit, and is used to control the outer tube unit to reciprocate along the axial direction of the inner core unit.

[0007] In some embodiments, the outer tube unit includes: An outer tube element, wherein the inner core unit is movably disposed inside the outer tube element and is connected to the outer tube control unit, for reciprocating along the axial direction of the inner core unit under the action of the outer tube control unit.

[0008] In some embodiments, the inner core unit includes: An inner core element is movably disposed inside the outer tube unit, and the claw unit is provided at the end of the inner core element; An outer tube guide element is disposed on the side of the inner core element and is slidably connected to the control end of the outer tube control unit, for the control end of the outer tube control unit to reciprocate along the outer tube guide element.

[0009] In some embodiments, the claw unit includes: A base element, the base element being disposed at the distal end of the inner core unit; A plurality of support elements are arranged at circumferential intervals along the base element; A plurality of claw elements are rotatably disposed on the corresponding support elements for switching between puncture mode and clamping mode to perform puncture and clamping operations. An elastic element is disposed on the base element and connected to a plurality of the claw elements respectively.

[0010] In some embodiments, the outer tube control unit includes: An outer tube control element is disposed on the outer tube unit and slidably connected to the inner core unit, and is used to control the outer tube unit to reciprocate along the axial direction of the inner core unit.

[0011] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: The present invention discloses a lens puncture and fixation device, which realizes the puncture function through the relative movement of the outer tube unit and the inner core unit, and realizes the clamping and fixation function through the relative movement of the claw unit and the inner core unit, fixing the dislocated lens in the pupillary area and reducing the excessive cortical or nuclear fragments falling into the vitreous cavity during the vitrectomy process; the puncture function and the clamping and fixation function are integrated into one device to realize a two-stage fixation mode, reducing the difficulty of operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram (a) of a lens puncture and fixation device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of an outer tube unit according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the inner core unit and the inner core control unit according to an embodiment of the present invention; Figure 4 This is a schematic diagram (a) of a claw unit according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a claw control unit according to an embodiment of the present invention; Figure 6 This is a schematic diagram (II) of a lens puncture and fixation device according to an embodiment of the present invention. Figure 7 This is a schematic diagram (II) of the outer tube unit according to an embodiment of the present invention; Figure 8 This is a schematic diagram (III) of the lens puncture and fixation device according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the outer tube unit and the outer tube control unit according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the inner core unit according to an embodiment of the present invention; Figure 11 This is a schematic diagram (II) of the claw unit according to an embodiment of the present invention; Figure 12 This is a schematic diagram (four) of the lens puncture and fixation device according to an embodiment of the present invention; Figure 13This is a schematic diagram of a locking unit according to an embodiment of the present invention.

[0013] The reference numerals in the accompanying drawings are as follows: 100, outer tube unit; 101, outer tube element; 102, inner core guide element; 103, first claw guide element; 200, inner core unit; 201, inner core element; 202, second claw guide element; 203, third claw guide element; 204, outer tube guide element; 300, claw unit; 301, base element; 302, support element; 303, claw element; 304, first transmission element; 305, fourth claw guide element; 306, elastic element; 400, inner core control unit; 401, inner core control element; 500, claw control unit; 501, second transmission element; 502, third transmission element; 503, claw control element; 600, outer tube control unit; 601, outer tube control element; 700, locking unit; 701, first locking element; 702, second locking element. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0017] Example 1 An illustrative embodiment of the present invention, such as Figure 1As shown, a lens puncture and fixation device includes an outer tube unit 100, an inner core unit 200, a claw unit 300, an inner core control unit 400, and a claw control unit 500. The inner core unit 200 is movably connected to the outer tube unit 100 and is used to move relative to the outer tube unit 100 so that the distal end of the inner core unit 200 extends into or out of the distal end of the outer tube unit 100. The claw unit 300 is movably disposed at the distal end of the inner core unit 200 and is used to follow the relative movement of the inner core unit 200 and the outer tube unit 100, and to switch between a puncture mode and a clamping mode when located outside the outer tube unit 100 to perform puncture and clamping operations. The inner core control unit 400 is disposed between the outer tube unit 100 and the inner core unit 200 and is used to control the reciprocating movement of the inner core unit 200 along the axial direction of the outer tube unit 100. The claw control unit 500 is disposed between the inner core unit 200 and the claw unit 300 and is used to follow the reciprocating movement of the inner core unit 200 along the axial direction of the outer tube unit 100 and to control the switching of the claw unit 300 between the puncture mode and the clamping mode.

[0018] The distal end is the end furthest from the medical staff (or the end closest to the patient's lens), and the proximal end is the end closest to the medical staff (or the end furthest from the patient's lens).

[0019] The lens puncture and fixation device of the present invention is generally used in phacoemulsification or vitrectomy surgery for cataracts. It is a surgical instrument used to fix a dislocated lens in the pupillary area to prevent lens fragments from falling into the vitreous cavity. It can be used for fixation when performing lens resection with a vitrectomy head during lens dislocation.

[0020] The lens puncture and fixation device of the present invention has an overall elongated strip-shaped structure.

[0021] like Figure 2 As shown, the outer tube unit 100 includes an outer tube element 101, an inner core guide element 102, and a first claw guide element 103. The inner core unit 200 is movably disposed inside the outer tube element 101. The inner core guide element 102 penetrates the side wall of the outer tube element 101 and is slidably connected to the control end of the inner core control unit 400, allowing the control end of the inner core control unit 400 to reciprocate along the inner core guide element 102. The first claw guide element 103 penetrates the side wall of the outer tube element 101 and is movably connected to the control end of the claw control unit 500, allowing the control end of the claw control unit 500 to reciprocate along the first claw guide element 103 and to rotate.

[0022] The outer tube element 101 has a slender strip structure.

[0023] The distal end of the outer tube element 101 has an open structure, which facilitates the inner core unit 200 to extend into and out of the distal end of the outer tube element 101.

[0024] The proximal end of the outer tube element 101 can be either an open structure or a closed structure. This is not limited in this invention.

[0025] Generally, the length of the outer tube element 101 is greater than the diameter of the outer tube element 101. Preferably, the ratio of the length of the outer tube element 101 to the diameter of the outer tube element 101 is greater than 50.

[0026] In some embodiments, the wall thickness of the outer tube element 101 is 0.1 to 0.2 mm. Using this wall thickness can reduce the weight of the outer tube element 101.

[0027] In some of these embodiments, the outer tube element 101 includes, but is not limited to, an outer tube.

[0028] The inner core guide element 102 extends in the axial direction of the outer tube element 101.

[0029] Generally, the axial dimension of the inner core guide element 102 is smaller than the axial dimension of the outer tube element 101, and the radial dimension (generally the width) of the inner core guide element 102 is smaller than the radial dimension (such as the outer diameter) of the outer tube element 101.

[0030] In some of these embodiments, the inner core guide element 102 includes, but is not limited to, guide grooves, slides, etc.

[0031] The first claw guide element 103 and the inner core guide element 102 can be located on the same side of the outer tube element 101 or on different sides. When the first claw guide element 103 and the inner core guide element 102 are located on the same side of the outer tube element 101, the inner core guide element 102 is disposed near the proximal end of the outer tube element 101, and the first claw guide element 103 is disposed near the distal end of the outer tube element 101.

[0032] In some embodiments, the first claw guide element 103 has a rectangular cross-section, which allows the control end of the claw control unit 500 to slide and rotate.

[0033] In some embodiments, the cross-section of the first claw guide element 103 is L-shaped or T-shaped. Specifically, the first claw guide element 103 includes a first claw longitudinal guide and a first claw transverse guide. The first claw longitudinal guide passes through the outer tube element 101 and is slidably connected to the control end of the claw control unit 500, for causing the control end of the claw control unit 500 to reciprocate along the axial direction of the outer tube element 101; the first claw transverse guide passes through the outer tube element 101 and communicates with the distal end of the first claw longitudinal guide, and is slidably connected to the control end of the claw control unit 500, for causing the control end of the claw control unit 500 to reciprocate along the circumferential direction of the outer tube element 101, wherein the first claw transverse guide is perpendicular to the first claw longitudinal guide.

[0034] The first claw longitudinal guide extends in the axial direction of the outer tube element 101.

[0035] Generally, the axial dimension of the first claw longitudinal guide is smaller than the axial dimension of the outer tube element 101, and the radial dimension (generally the width) of the first claw longitudinal guide is smaller than the radial dimension (such as the outer diameter) of the outer tube element 101.

[0036] In some of these embodiments, the longitudinal guide of the first claw includes, but is not limited to, guide grooves, slides, etc.

[0037] The first claw lateral guide extends in the circumferential direction of the outer tube element 101.

[0038] Generally, the axial dimension of the first claw lateral guide is smaller than the radial dimension of the outer tube element 101, and the radial dimension (generally the width) of the first claw lateral guide is smaller than the axial dimension of the outer tube element 101.

[0039] The dimensions of the first claw lateral guide are matched with the dimensions of the first claw longitudinal guide. Generally, the width of the first claw lateral guide is equal to the width of the first claw longitudinal guide.

[0040] In some of these embodiments, the first claw lateral guide includes, but is not limited to, guide grooves, slides, etc.

[0041] In some embodiments, there are multiple first claw guide elements 103. These multiple first claw guide elements 103 are spaced apart circumferentially along the outer tube element 101, and are not interconnected. For example, there are two first claw guide elements 103, which are symmetrically arranged.

[0042] like Figure 3As shown, the inner core unit 200 includes an inner core element 201, a second claw guide element 202, and a third claw guide element 203. The inner core element 201 is movably disposed inside the outer tube unit 100. A claw unit 300 is disposed at the end of the inner core element 201. A claw control unit 500 is disposed inside and on the side of the inner core element 201 and is connected to the inner core control unit 400, for reciprocating along the axial direction of the outer tube unit 100 under the action of the inner core control unit 400. The second claw guide element 202 is disposed through the distal end of the inner core element 201 and is rotatably connected to the transmission end of the claw control unit 500. The third claw guide element 203 is disposed through the side wall of the inner core element 201, communicates with the second claw guide element 202, and is rotatably connected to the control end of the claw control unit 500.

[0043] Specifically, the inner core element 201 is movably disposed inside the outer tube element 101 for reciprocating along the axial direction of the outer tube element 101; the third claw guide element 203 corresponds to the first claw guide element 103.

[0044] The inner core element 201 has a slender strip structure.

[0045] The inner core element 201 has a hollow structure. The distal end of the inner core element 201 is a closed structure. The proximal end of the inner core element 201 can be either a closed or an open structure. This is not limited in this invention.

[0046] Generally, the outer diameter of the inner core element 201 is not greater than the inner diameter of the outer tube element 101, and the axial dimension of the inner core element 201 is not greater than the dimension of the outer tube element 101.

[0047] Generally, the length of the inner core element 201 is greater than the diameter of the inner core element 201. Preferably, the ratio of the length of the inner core element 201 to the diameter of the inner core element 201 is greater than 50.

[0048] In some of these embodiments, the inner core element 201 includes, but is not limited to, an inner core.

[0049] Generally, the second claw guide element 202 and the inner core element 201 are coaxially arranged.

[0050] Generally, the radial dimension (outer diameter) of the second claw guide element 202 is smaller than the radial dimension (outer diameter) of the inner core element 201.

[0051] In some of these embodiments, the second claw guide element 202 includes, but is not limited to, guide grooves, rotating grooves, etc.

[0052] The third claw guide element 203 extends in the circumferential direction of the inner core element 201.

[0053] The dimensions of the third claw guide element 203 are approximately the same as those of the first claw guide element 103.

[0054] In some embodiments, there are multiple third claw guide elements 203. These multiple third claw guide elements 203 are spaced apart circumferentially along the inner core element 201, and are not interconnected. For example, there are two third claw guide elements 203, which are symmetrically arranged.

[0055] Generally, the number of third claw guide elements 203 is equal to the number of first claw guide elements 103.

[0056] In some of these embodiments, the third claw guide element 203 includes, but is not limited to, guide grooves, rotating grooves, sliding grooves, etc.

[0057] like Figure 4 As shown, the claw unit 300 includes a base element 301, a plurality of support elements 302, a plurality of claw elements 303, a plurality of first transmission elements 304, and a fourth claw guide element 305. The base element 301 is disposed at the distal end of the inner core unit 200; the plurality of support elements 302 are spaced apart circumferentially along the base element 301; the plurality of claw elements 303 are rotatably disposed on corresponding support elements 302, used to switch between piercing and clamping modes for piercing and clamping operations; the plurality of first transmission elements 304 are respectively disposed on corresponding claw elements 303 and are respectively connected to the transmission end of the claw control unit 500, used to drive the corresponding claw elements 303 to rotate under the action of the claw control unit 500; the fourth claw guide element 305 passes through the base element 301 and is rotatably connected to the transmission end of the claw control unit 500.

[0058] Specifically, the base element 301 is disposed at the far end of the inner core element 201; the fourth claw guide element 305 corresponds to the second claw guide element 202.

[0059] The connection between the base element 301 and the inner core element 201 can be a fixed connection or a detachable connection. Fixed connections include, but are not limited to, integral molding; detachable connections include, but are not limited to, plug-in, snap-fit, and bolt connections. These connection methods are all conventional techniques in this field and will not be elaborated further.

[0060] Generally, the radial dimension (e.g., outer diameter) of the base element 301 is not greater than the radial dimension (e.g., outer diameter) of the inner core element 201.

[0061] In some of these embodiments, the base element 301 includes, but is not limited to, a base, a pedestal, etc.

[0062] The bracket element 302 is fixedly connected to the base element 301, including but not limited to being integrally formed.

[0063] Generally, the distance between two adjacent support elements 302 is equal.

[0064] Generally, there are 3 to 5 support elements 302. Preferably, there are 4 support elements 302.

[0065] Generally, the support element 302 is U-shaped. Specifically, the support element 302 includes two support members. The two support members are inclined to the base element 301, the bottom ends of the two support members are respectively connected to the base element 301, the top ends of the two support members are respectively connected to the claw element 303, and the middle parts of the two support members are respectively rotatably connected to the first transmission element 304.

[0066] In some of these embodiments, the support element 302 includes, but is not limited to, a rotating support, a rotating base, etc.

[0067] When the claw elements 303 are in the piercing state, the distal ends of the claw elements 303 together form a sharp structure; when the claw elements 303 are in the clamping state, the claw elements 303 form a petal-shaped or umbrella-shaped structure.

[0068] The claw element 303 can have a shape that is either an outer arc and an inner arc, an outer arc and a flat inner arc, a flat outer arc and an inner arc, or a flat outer arc and a flat inner arc. This is not a limitation in this invention.

[0069] The distal end of the claw element 303 is pointed. For example, the distal end of the claw element 303 is the pointed end of an acute angle, with an acute angle of 5° to 30°. Preferably, it is 20°.

[0070] The maximum rotation angle of the claw element 303 is 75°~90°.

[0071] Generally, the number of claw elements 303 is equal to the number of support elements 302.

[0072] In some embodiments, the inner surface of the claw element 303 is roughened. For example, it may be provided with anti-slip texture to increase friction.

[0073] Generally, the bottom end of the claw element 303 is U-shaped. The first transmission element 304 is provided at the U-shaped opening of the claw element 303.

[0074] Generally, the specifications of claw element 303 are 0.4mm~1.0mm.

[0075] In some of these embodiments, the claw element 303 includes, but is not limited to, claw teeth, gripping claws, etc.

[0076] The first transmission element 304 is detachably connected to the claw element 303, including but not limited to plug-in, snap-fit, and bolt connection, so that the claw element 303 rotates with the first transmission element 304.

[0077] Generally, the number of first transmission elements 304 is equal to the number of claw elements 303.

[0078] In some of these embodiments, the first transmission element 304 includes, but is not limited to, a transmission gear.

[0079] Generally, the fourth claw guide element 305 is coaxially arranged with the base element 301.

[0080] Generally, the radial dimension of the fourth claw guide element 305 is smaller than the radial dimension of the base element 301, and the axial dimension of the fourth claw guide element 305 is equal to the axial dimension of the base element 301.

[0081] Generally, the radial dimension of the fourth claw guide element 305 is equal to the radial dimension of the second claw guide element 202.

[0082] In some of these embodiments, the fourth claw guide element 305 includes, but is not limited to, guide grooves, rotating grooves, etc.

[0083] like Figure 3 As shown, the inner core control unit 400 includes an inner core control element 401. The inner core control element 401 is connected to the inner core unit 200 and slidably connected to the outer tube unit 100, and is used to drive the inner core unit 200 to reciprocate along the axial direction of the outer tube unit 100.

[0084] Specifically, the inner core control element 401 is connected to the inner core element 201 and is slidably connected to the inner core guide element 102, and is used to drive the inner core element 201 to reciprocate along the inner core guide element 102.

[0085] The connection between the inner core control element 401 and the inner core element 201 can be a fixed connection or a detachable connection. Fixed connections include, but are not limited to, integral molding; detachable connections include, but are not limited to, plug-in, snap-fit, and bolt connections. These connection methods are all conventional techniques in this field and will not be elaborated further.

[0086] In some embodiments, the inner core control element 401 includes an inner core guide and an inner core control element. The inner core guide is connected to the inner core element 201 and slidably connected to the inner core guide element 102, and is used to drive the inner core element 201 to reciprocate along the inner core guide element 102; the inner core control element is disposed at the top of the inner core guide and is used to drive the inner core guide to move.

[0087] Generally, the radial dimension (e.g., width) of the inner core guide is equal to the radial dimension (e.g., width) of the inner core guide element 102, and the axial dimension of the inner core guide is smaller than the axial dimension of the inner core guide element 102.

[0088] Generally, the radial dimension (e.g., width) of the inner core control component is greater than the radial dimension (e.g., width) of the inner core guide component, and the axial dimension of the inner core control component is not less than the axial dimension of the inner core guide component.

[0089] In some embodiments, the top surface of the inner core control member is roughened. For example, it may have anti-slip textures to increase friction.

[0090] In some of these embodiments, the core control element 401 includes, but is not limited to, control buttons.

[0091] like Figure 5 As shown, the claw control unit 500 includes a second transmission element 501, a third transmission element 502, and a claw control element 503. The second transmission element 501 is movably disposed at the distal end of the inner core unit 200 and is connected to the claw unit 300 for reciprocating motion along the axial direction of the outer tube unit 100 following the inner core unit 200, and for switching the claw unit 300 between a piercing mode and a clamping mode. The third transmission element 502 is rotatably disposed in the inner core unit 200 and connected to the second transmission element 501, for reciprocating motion along the axial direction of the outer tube unit 100 following the inner core unit 200, and for rotating the second transmission element 501. The claw control element 503 is connected to the third transmission element 502 and is movably connected to both the outer tube unit 100 and the inner core unit 200, for reciprocating motion along the axial direction of the outer tube unit 100 following the inner core unit 200, and for rotating the third transmission element 502.

[0092] Specifically, the second transmission element 501 is movably disposed at the far end of the inner core element 201 and at the far end of the base element 301, and is respectively connected to a plurality of first transmission elements 304; the third transmission element 502 is rotatably disposed on the inner core element 201 and is respectively rotatably connected to the second claw guide element 202 and the fourth claw guide element 305; the claw control element 503 is slidably connected to the first claw guide element 103 and movably connected to the third claw guide element 203.

[0093] The second transmission element 501 is engaged with several first transmission elements 304. The engagement connection method is a conventional technique in this field and will not be described in detail here.

[0094] The rotation direction of the second transmission element 501 is different from that of the first transmission element 304. Generally, the rotation axis of the second transmission element 501 is perpendicular to the rotation axis of the first transmission element 304.

[0095] In some of these embodiments, the second transmission element 501 includes, but is not limited to, a screw.

[0096] The connection between the third transmission element 502 and the second transmission element 501 can be a fixed connection or a detachable connection. Fixed connections include, but are not limited to, integral molding; detachable connections include, but are not limited to, plug-in and snap-fit ​​connections. These connection methods are conventional techniques in this field and will not be elaborated further.

[0097] Generally, the radial dimension of the third transmission element 502 is equal to the radial dimension of the second claw guide element 202 (fourth claw guide element 305), and the axial dimension of the third transmission element 502 is greater than the axial dimension of the second claw guide element 202 (fourth claw guide element 305).

[0098] In some of these embodiments, the third transmission element 502 includes, but is not limited to, a transmission rod, a rotating rod, a rotating shaft, a transmission shaft, etc.

[0099] In this invention, the operation modes of the claw control element 503 and the third transmission element 502 include: the claw control element 503 and the third transmission element 502 performing the same rotation operation, that is, the rotation axis of the claw control element 503 and the rotation axis of the third transmission element 502 are coaxial; the claw control element 503 and the third transmission element 502 performing their own independent rotation operations, that is, the rotation axis of the claw control element 503 and the rotation axis of the third transmission element 502 are parallel.

[0100] (a) The claw control element 503 and the third transmission element 502 rotate in the same direction. The claw control element 503 and the third transmission element 502 can be fixedly connected or detachably connected. Fixed connections include, but are not limited to, integral molding; detachable connections include, but are not limited to, plug-in and snap-fit ​​connections. These connection methods are conventional techniques in the field and will not be elaborated further.

[0101] The claw control element 503 is slidably connected to the first claw guide element 103 (i.e., L-shaped or T-shaped) and the third claw guide element 203.

[0102] In some embodiments, the claw control element 503 includes a claw guide and a claw control element. The claw guide is connected to the third transmission element 502 and is slidably connected to the third claw guide element 203 and the first claw guide element 103, respectively, for driving the third transmission element 502 to rotate; the claw control element is disposed at the top of the claw guide and is used to drive the claw guide to move.

[0103] Generally, the width of the claw guide is equal to the width of the first claw guide element 103 (third claw guide element 203), the length of the claw guide is less than the length of the first claw guide element 103 (third claw guide element 203), and the length of the claw guide is greater than the depth of the first claw guide element 103 (third claw guide element 203).

[0104] Generally, the radial dimension (e.g., width) of the claw control component is greater than the radial dimension (e.g., width) of the claw guide component, and the axial dimension of the claw control component is not less than the axial dimension of the claw guide component.

[0105] In some embodiments, the top surface of the claw control member is roughened. For example, it is provided with anti-slip texture to increase friction.

[0106] In some embodiments, there are multiple claw guides. These guides are spaced apart circumferentially along the third transmission element 502 and are each connected to a claw control member. For example, there are two claw guides, symmetrically arranged. In this case, the claw control member is annular.

[0107] Generally, the number of claw guides is equal to the number of first claw guide elements 103 (third claw guide elements 203).

[0108] In some of these embodiments, the claw control element 503 includes, but is not limited to, a joystick, a control dial, etc.

[0109] (ii) The claw control element 503 and the third transmission element 502 perform independent rotation operations. The claw control element 503 is engaged with the third transmission element 502. The engagement method is a conventional technique in the art and will not be described in detail here. In this case, the proximal end of the third transmission element 502 is provided with threads or teeth.

[0110] The claw control element 503 is slidably connected to the first claw guide element 103 and rotatably connected to the third claw guide element 203.

[0111] In some of these embodiments, the claw control element 503 includes, but is not limited to, control gears.

[0112] Generally, in this embodiment, the claw control element 503 and the third transmission element 502 perform their own independent rotation operations.

[0113] The method of using this invention is as follows: (a) Puncture Operate the inner core control element 401 to move it along the inner core guide element 102 from the proximal end of the outer tube element 101 to the distal end of the outer tube element 101, that is, from the initial position to the preset position. As the inner core control element 401 moves, the inner core element 201 carrying the claw unit 300 gradually protrudes from the distal end of the outer tube element 101, and the claw unit 300 performs a piercing action. When the inner core control element 401 reaches the preset position, the operation of the inner core control element 401 is stopped; (ii) Clamping and fixing The operating claw control element 503 drives the second transmission element 501 to rotate around the axis of the inner core element 201 via the third transmission element 502; As the second transmission element 501 rotates, several claw elements 303 gradually unfold until they are fully open under the action of the corresponding first transmission element 304, forming a petal-shaped or umbrella-shaped structure to clamp and fix the lens. (iii) Removal After the surgery is completed, the manipulator 503 drives the second transmission element 501 to rotate around the axis of the inner core element 201 via the third transmission element 502. As the transmission end of the second transmission element 501 rotates, the claw unit 300 gradually retracts until it is completely closed. Operate the inner core control element 401 to move it along the inner core guide element 102 from the far end of the outer tube element 101 to the near end of the outer tube element 101, that is, from the preset position to the initial position. As the inner core control element 401 moves, the inner core element 201 carrying the claw unit 300 gradually extends into the distal end of the outer tube element 101. When the inner core control element 401 reaches the initial position, the operation of the inner core control element 401 is stopped.

[0114] The technical effects of this invention are as follows: 1) The puncture function is achieved through the relative movement of the outer tube unit and the inner core unit, and the clamping and fixation function is achieved through the relative movement of the claw unit and the inner core unit, which fixes the dislocated lens in the pupillary area and reduces the amount of cortical or nuclear fragments falling into the vitreous cavity during the vitrectomy process. 2) The puncture function and the clamping and fixation function are integrated into one device to achieve a two-stage fixation mode, reducing the difficulty of operation; 3) The inner core control unit and the claw control unit are used to operate the inner core unit and the claw unit independently, without interfering with each other, thus avoiding operational errors.

[0115] Example 2 like Figure 6As shown, a lens puncture and fixation device includes an outer tube unit 100, an inner core unit 200, a claw unit 300, and a claw control unit 500. The inner core unit 200 is movably connected to the outer tube unit 100 and is used to move relative to the outer tube unit 100 so that the distal end of the inner core unit 200 extends into or out of the distal end of the outer tube unit 100. The claw unit 300 is movably disposed at the distal end of the inner core unit 200 and is used to follow the relative movement of the inner core unit 200 and the outer tube unit 100, and to switch between a puncture mode and a clamping mode when located outside the outer tube unit 100 to perform puncture and clamping operations. The claw control unit 500 is drive-connected to the claw unit 300 and movably connected to both the outer tube unit 100 and the inner core unit 200, and is used to control the reciprocating movement of the inner core unit 200 along the axial direction of the outer tube unit 100 and to control the switching of the claw unit 300 between the puncture mode and the clamping mode.

[0116] like Figure 7 As shown, the outer tube unit 100 includes an outer tube element 101 and a first claw guide element 103. An inner core unit 200 is movably disposed inside the outer tube element 101. The first claw guide element 103 penetrates the side wall of the outer tube element 101 and is movably connected to the control end of the claw control unit 500, allowing the control end of the claw control unit 500 to reciprocate and rotate along the first claw guide element 103.

[0117] In this embodiment, the structure of the outer tube element 101 is basically the same as that in Embodiment 1, and will not be described again here.

[0118] The difference between this embodiment and Embodiment 1 is the structure of the first claw guide element 103.

[0119] In this embodiment, the cross-section of the first claw guide element 103 is L-shaped or T-shaped. Specifically, the first claw guide element 103 includes a first claw longitudinal guide and a first claw transverse guide. The first claw longitudinal guide passes through the outer tube element 101 and is slidably connected to the control end of the claw control unit 500, for causing the control end of the claw control unit 500 to reciprocate along the axial direction of the outer tube element 101. The first claw transverse guide passes through the outer tube element 101 and communicates with the distal end of the first claw longitudinal guide, and is slidably connected to the control end of the claw control unit 500, for causing the control end of the claw control unit 500 to reciprocate along the circumferential direction of the outer tube element 101. The first claw transverse guide is perpendicular to the first claw longitudinal guide.

[0120] In some of these embodiments, the longitudinal guide of the first claw includes, but is not limited to, guide grooves, slides, etc.

[0121] In some of these embodiments, the first claw lateral guide includes, but is not limited to, guide grooves, slides, etc.

[0122] In some embodiments, there are multiple first claw guide elements 103. These multiple first claw guide elements 103 are spaced apart circumferentially along the outer tube element 101, and are not interconnected. For example, there are two first claw guide elements 103, which are symmetrically arranged.

[0123] like Figure 3 As shown, the inner core unit 200 includes an inner core element 201, a second claw guide element 202, and a third claw guide element 203. The inner core element 201 is movably disposed inside the outer tube unit 100. A claw unit 300 is disposed at the end of the inner core element 201. A claw control unit 500 is disposed inside and on the side of the inner core element 201 for reciprocating motion along the axial direction of the outer tube unit 100 under the action of the claw control unit 500. The second claw guide element 202 is disposed through the end of the inner core element 201 and is rotatably connected to the transmission end of the claw control unit 500. The third claw guide element 203 is disposed through the side wall of the inner core element 201, communicates with the second claw guide element 202, and is rotatably connected to the control end of the claw control unit 500.

[0124] In this embodiment, the structures of the inner core element 201, the second claw guide element 202, and the third claw guide element 203 are basically the same as those in Embodiment 1, and will not be described again here.

[0125] In this embodiment, the third claw guide element 203 corresponds to the first claw guide element 103. Specifically, when the control end of the claw control unit 500 is located at the first claw longitudinal guide of the first claw guide element 103, at least a portion of the third claw guide element 203 is closed by the outer tube element 101, and the claw control unit 500 cannot perform a rotation operation; when the control end of the claw control unit 500 is located at the first claw transverse guide of the first claw guide element 103, the third claw guide element 203 is connected to the first claw transverse guide of the first claw guide element 103, and the control end of the claw control unit 500 can perform a rotation operation.

[0126] In this embodiment, the specifications of the third claw guide element 203 are approximately the same as those of the first claw lateral guide of the first claw guide element 103.

[0127] In some embodiments, there are multiple third claw guide elements 203. These multiple third claw guide elements 203 are spaced apart circumferentially along the inner core element 201, and are not interconnected. For example, there are two third claw guide elements 203, which are symmetrically arranged.

[0128] Generally, the number of third claw guide elements 203 is equal to the number of first claw guide elements 103.

[0129] like Figure 4 As shown, the claw unit 300 includes a base element 301, a plurality of support elements 302, a plurality of claw elements 303, a plurality of first transmission elements 304, and a fourth claw guide element 305. The base element 301 is disposed at the distal end of the inner core unit 200; the plurality of support elements 302 are spaced apart circumferentially along the base element 301; the plurality of claw elements 303 are rotatably disposed on corresponding support elements 302, used to switch between piercing and clamping modes for piercing and clamping operations; the plurality of first transmission elements 304 are respectively disposed on corresponding claw elements 303 and are respectively connected to the transmission end of the claw control unit 500, used to drive the corresponding claw elements 303 to rotate under the action of the claw control unit 500; the fourth claw guide element 305 passes through the base element 301 and is rotatably connected to the transmission end of the claw control unit 500.

[0130] In this embodiment, the structures of the base element 301, the fourth claw guide element 302, the bracket element 303, the claw element 304, and the first transmission element 305 are basically the same as those in Embodiment 1, and will not be described again here.

[0131] like Figure 5 As shown, the claw control unit 500 includes a second transmission element 501, a third transmission element 502, and a claw control element 503. The second transmission element 501 is movably disposed at the end of the inner core unit 200 and is connected to the claw unit 300, used to follow the inner core unit 200 in its axial reciprocating motion along the outer tube unit 100 and to switch the claw unit 300 between a piercing mode and a clamping mode. The third transmission element 502 is rotatably disposed in the inner core unit 200 and connected to the second transmission element 501, used to follow the inner core unit 200 in its axial reciprocating motion along the outer tube unit 100 and to drive the second transmission element 501 to rotate. The claw control element 503 is connected to the third transmission element 502 and is movably connected to both the outer tube unit 100 and the inner core unit 200, used to control the inner core unit 200 in its axial reciprocating motion along the outer tube unit 100 and to drive the third transmission element 502 to rotate.

[0132] In this embodiment, the structure of the second transmission element 501 is basically the same as that in Embodiment 1, and will not be described again here.

[0133] The difference between this embodiment and embodiment 1 is the connection method between the third transmission element 502 and the claw control element 503.

[0134] In this embodiment, the claw control element 503 and the third transmission element 502 perform the same rotation operation, that is, the rotation axis of the claw control element 503 and the rotation axis of the third transmission element 502 are coaxial.

[0135] The claw control element 503 and the third transmission element 502 can be fixedly connected or detachably connected. Fixed connections include, but are not limited to, integral molding; detachable connections include, but are not limited to, plug-in and snap-fit ​​connections. These connection methods are conventional techniques in the field and will not be elaborated further.

[0136] The claw control element 503 is slidably connected to the first claw guide element 103 (i.e., L-shaped or T-shaped) and the third claw guide element 203.

[0137] In some embodiments, the claw control element 503 includes a claw guide and a claw control element. The claw guide is connected to the third transmission element 502 and is slidably connected to the third claw guide element 203 and the first claw guide element 103, respectively, for driving the third transmission element 502 to rotate; the claw control element is disposed at the top of the claw guide and is used to drive the claw guide to move.

[0138] Generally, the width of the claw guide is equal to the width of the first claw guide element 103 (third claw guide element 203), the length of the claw guide is less than the length of the first claw guide element 103 (third claw guide element 203), and the length of the claw guide is greater than the depth of the first claw guide element 103 (third claw guide element 203).

[0139] Generally, the radial dimension (e.g., width) of the claw control component is greater than the radial dimension (e.g., width) of the claw guide component, and the axial dimension of the claw control component is not less than the axial dimension of the claw guide component.

[0140] In some embodiments, the top surface of the claw control member is roughened. For example, it is provided with anti-slip texture to increase friction.

[0141] In some embodiments, there are multiple claw guides. These guides are spaced apart circumferentially along the third transmission element 502 and are each connected to a claw control member. For example, there are two claw guides, symmetrically arranged. In this case, the claw control member is annular.

[0142] Generally, the number of claw guides is equal to the number of first claw guide elements 103 (third claw guide elements 203).

[0143] In some of these embodiments, the claw control element 503 includes, but is not limited to, a joystick, a control dial, etc.

[0144] The usage method of this embodiment is as follows: (a) Puncture The operating claw control element 503 is moved along the first claw guide element 103 from the proximal end of the outer tube element 101 to the distal end of the outer tube element 101, that is, from the initial position to the preset position. As the claw control element 503 moves, the inner core element 201 carrying the claw unit 300 gradually protrudes from the distal end of the outer tube element 101, and the claw unit 300 performs a piercing action. When the claw control element 503 reaches the preset position, the operation of the claw control element 503 is stopped; (ii) Clamping and fixing The operating claw control element 503 is moved along the third claw guide element 203 to move away from the first claw guide element 103, and the second transmission element 501 is driven to rotate around the axis of the inner core element 201 through the third transmission element 502. As the second transmission element 501 rotates, several claw elements 303 gradually unfold until they are fully open under the action of the corresponding first transmission element 304, forming a petal-shaped or umbrella-shaped structure to clamp and fix the lens. (iii) Removal After the surgery is completed, the claw control element 503 is moved along the third claw guide element 203 to approach the first claw guide element 103, and the second transmission element 501 is driven to rotate around the axis of the inner core element 201 through the third transmission element 502. As the transmission end of the second transmission element 501 rotates, the claw unit 300 gradually retracts until it is completely closed. The operating claw control element 503 is moved along the first claw guide element 103 from the far end of the outer tube element 101 to the near end of the outer tube element 101, that is, from the preset position to the initial position. As the claw control element 503 moves, the inner core element 201 carrying the claw unit 300 gradually extends into the distal end of the outer tube element 101. When the claw control element 503 reaches the initial position, stop operating the claw control element 503.

[0145] The technical effects of this embodiment are as follows: 1) The core unit and the claw unit are controlled by a single claw control unit, reducing the difficulty of operation.

[0146] Example 3 like Figure 8As shown, a lens puncture and fixation device includes an outer tube unit 100, an inner core unit 200, a claw unit 300, and an outer tube control unit 600. The inner core unit 200 is movably connected to the outer tube unit 100 and is used to move relative to the outer tube unit 100 so that the distal end of the inner core unit 200 extends into or out of the distal end of the outer tube unit 100. The claw unit 300 is movably disposed at the distal end of the inner core unit 200 and is used to follow the relative movement of the inner core unit 200 and the outer tube unit 100, and to switch between a puncture mode and a clamping mode when located outside the outer tube unit 100 to perform puncture and clamping operations. The outer tube control unit 600 is disposed between the outer tube unit 100 and the inner core unit 200 and is used to control the reciprocating movement of the outer tube unit 100 along the axial direction of the inner core unit 200.

[0147] In this embodiment, the distal end of the claw unit 300 protrudes beyond the distal end of the outer tube unit 100.

[0148] like Figure 9 As shown, the outer tube unit 100 includes an outer tube element 101. The outer tube element 101 has an inner core unit 200 movably disposed inside and is connected to the outer tube control unit 600, for reciprocating along the axial direction of the inner core unit 200 under the action of the outer tube control unit 600.

[0149] In this embodiment, the structure of the outer tube element 101 is basically the same as that in Embodiment 1, and will not be described again here.

[0150] Preferably, the proximal end of the outer tube element 101 has an open structure, which facilitates the proximal end of the inner core unit 200 to be exposed, making it convenient for medical staff to fix the proximal end of the inner core unit 200 so that the inner core unit 200 remains stationary.

[0151] like Figure 10 As shown, the inner core unit 200 includes an inner core element 201 and an outer tube guide element 204. The inner core element 201 is movably disposed inside the outer tube unit 100, and a claw unit 300 is provided at the end of the inner core element 201. The outer tube guide element 204 is disposed on the side of the inner core element 201 and is slidably connected to the control end of the outer tube control unit 600, so as to allow the control end of the outer tube control unit 600 to reciprocate along the outer tube guide element 204.

[0152] In this embodiment, the structure of the inner core element 201 is basically the same as that in Embodiment 1, and will not be described again here.

[0153] The outer tube guide element 204 extends in the axial direction of the inner core element 201.

[0154] The dimensions of the outer tube guide element 204 are matched with the dimensions of the inner core element 201. Generally, the axial dimension of the outer tube guide element 204 is smaller than the axial dimension of the inner core element 201, and the radial dimension (generally the width) of the outer tube guide element 204 is smaller than the radial dimension (such as the outer diameter) of the inner core element 201.

[0155] In some of these embodiments, the outer tube guide element 204 includes, but is not limited to, guide grooves, slides, etc.

[0156] like Figure 12 As shown, the claw unit 300 includes a base element 301, a plurality of support elements 302, a plurality of claw elements 303, and an elastic element 306. The base element 301 is disposed at the distal end of the inner core unit 200; the plurality of support elements 302 are spaced apart circumferentially along the base element 301; the plurality of claw elements 303 are rotatably disposed on corresponding support elements 302, used to switch between piercing and clamping modes for piercing and clamping operations; the elastic element 306 is disposed on the base element 301 and connected to the plurality of claw elements 303 respectively.

[0157] In this embodiment, the structures of the base element 301, the support element 302, and the claw element 303 are basically the same as those in Embodiment 1, and will not be described again here.

[0158] The elastic element 306 is installed at the far end of the base element 301 and is fixedly connected to a number of claw elements 303.

[0159] The elastic element 306 has a compressed state and an extended state. When the elastic element 306 is in the compressed state, the claw elements 303 close together to present a piercing shape; when the elastic element 306 is in the extended state, the claw elements 303 open to present a clamping shape.

[0160] In some of these embodiments, the elastic element 306 includes, but is not limited to, a spring.

[0161] like Figure 9 As shown, the outer tube control unit 600 includes an outer tube control element 601. The outer tube control element 601 is disposed in the outer tube unit 100 and slidably connected to the inner core unit 200, and is used to control the outer tube unit 100 to reciprocate along the axial direction of the inner core unit 200.

[0162] Specifically, the outer tube control element 601 is disposed on the outer tube element 101 and is slidably connected to the outer tube guide element 204, and is used to control the outer tube element 101 to reciprocate along the axial direction of the inner core element 201.

[0163] The connection between the outer tube control element 601 and the outer tube element 101 can be a fixed connection or a detachable connection. Fixed connections include, but are not limited to, integral molding; detachable connections include, but are not limited to, plug-in, snap-fit, and bolt connections. These connection methods are all conventional techniques in this field and will not be elaborated further.

[0164] Generally, the outer tube control element 601 includes an outer tube guide and an outer tube control element. The outer tube guide is disposed on the inner side of the outer tube element 101 and is slidably connected to the outer tube guide element 204; the outer tube control element is disposed on the outer side of the outer tube element 101 and is connected to the outer tube element 101 or the outer tube guide.

[0165] The dimensions of the outer tube guide are matched with the dimensions of the outer tube guide element 204. Generally, the radial dimension (e.g., width) of the outer tube guide is equal to the radial dimension (e.g., width) of the outer tube guide element 204, and the axial dimension of the outer tube guide element is smaller than the axial dimension of the outer tube guide element 204.

[0166] In some embodiments, the top surface of the outer tube control member is roughened. For example, it may have anti-slip textures to increase friction.

[0167] In some embodiments, the outer tube control element 601 includes, but is not limited to, control buttons.

[0168] The usage method of this embodiment is as follows: (a) Puncture Since the distal end of the claw unit 300 protrudes from the distal end of the outer tube element 101, the claw unit 300 can perform the piercing action without additional operation. (ii) Clamping and fixing Operate the outer tube control element 601 to move it along the outer tube guide element 204 from the far end of the inner core element 201 to the near end of the inner core element 201, that is, from the initial position to the preset position. As the outer tube control element 601 moves, the distal end of the outer tube element 101 gradually moves away from the distal end of the inner core element 201. Under the action of the elastic element 306, several claw elements 303 gradually unfold until they are fully open, forming a petal-shaped or umbrella-shaped structure to clamp and fix the lens. (iii) Removal After the surgery is completed, the outer tube control element 601 is operated to move along the outer tube guide element 204 from the proximal end of the inner core element 201 to the distal end of the inner core element 201, that is, from the preset position to the initial position. As the outer tube control element 601 moves, the far end of the outer tube element 101 gradually approaches the far end of the inner core element 201. Under the pressure of the outer tube element 101, several claw elements 303 gradually retract until they are completely closed. When the outer tube control element 601 reaches the initial position, stop operating the outer tube control element 601.

[0169] The technical effects of this embodiment are as follows: 1) By using the outer tube control unit to control the outer tube unit, the claw unit can be switched between the piercing mode and the clamping mode, further reducing the difficulty of operation.

[0170] Example 4 This embodiment is a modified embodiment of Embodiments 1 and 2.

[0171] like Figure 12 As shown, the lens puncture and fixation device also includes a locking unit 700. The locking unit 700 is disposed between the outer tube unit 100 and the claw control unit 500, and is removably locked to at least one of the outer tube unit 100 and the claw control unit 500, for locking the claw control unit 500 to prevent the claw control unit 500 from moving.

[0172] like Figure 13 As shown, the locking unit 700 includes a first locking element 701 and a second locking element 702. The first end of the first locking element 701 is rotatably connected to one of the outer tube unit 100 and the claw control unit 500, and the second end of the first locking element 701 is removably locked to one of the outer tube unit 100 and the claw control unit 500. The second locking element 702 is disposed in the other of the outer tube unit 100 and the claw control unit 500, and is removably locked to the first locking element 701, for cooperating with the first locking element 701 to lock the claw control unit 500 to prevent movement of the claw control unit 500.

[0173] Specifically, the first end of the first locking element 701 is rotatably connected to one of the outer tube element 101 and the claw control element 503, and the second end of the first locking element 701 is removably locked to one of the outer tube element 101 and the claw control element 503; the second locking element 702 is disposed on the other of the outer tube element 101 and the claw control element 503.

[0174] In this embodiment, the first end of the first locking element 701 is rotatably connected to the outer tube element 101, the second end of the first locking element 701 is removably locked to the outer tube element 101, and the second locking element 702 is disposed on the claw control element 503 as an example.

[0175] The first locking element 701 is disposed on the side of the first claw guide element 103.

[0176] The rotational connection between the first locking element 701 and the outer tube element 101 can be achieved by a rotating shaft, which is a conventional technique in this field and will not be described in detail here.

[0177] The removable locking connection between the first locking element 701 and the outer tube element 101 can be achieved by means of snap-fit ​​or other methods, which are conventional technical means in this field and will not be described in detail here.

[0178] In some of these embodiments, the first locking element 701 includes, but is not limited to, a cover.

[0179] The second locking element 702 is fixedly connected to the claw control element 503, including but not limited to integral molding.

[0180] When the claw control element 503 is a control gear, the second locking element 702 is the toothed surface of the claw control element 503. The contact surfaces of the first locking element 701 and the second locking element 702 are provided with toothed surfaces, so that the first locking element 701 and the second locking element 702 are engaged to prevent the claw control element 503 from rotating.

[0181] When the claw control element 503 is a joystick or a control dial, the second locking element 702 is a protrusion of the claw control element 503 (claw control member) (it can be set on the side or top of the claw control member). The contact surfaces of the first locking element 701 and the second locking element 702 are provided with several grooves, so that the first locking element 701 and the second locking element 702 are engaged to prevent the claw control element 503 from sliding.

[0182] In some embodiments, there are multiple second locking elements 702. These multiple second locking elements 72 are spaced apart along the extending direction of the claw control element 503.

[0183] The usage method of this embodiment is basically the same as that of Embodiments 1 to 2, and the clamping and fixing in (II) further includes: When the claw unit 300 is switched to the clamping mode, the first locking element 701, the second locking element 702, and the outer tube element 101 are engaged to lock the claw control element 503 and prevent the claw control element 503 from moving during operation.

[0184] The technical effects of this embodiment are as follows: 1) The relative position of the claw control unit and the outer tube unit is locked by the locking unit. When the claw unit switches to the clamping mode, the claw unit is kept open and does not change its shape.

[0185] Example 5 This embodiment is a modified embodiment of Embodiments 1 to 4.

[0186] Furthermore, the lens puncture and fixation device also includes a handle unit. The handle unit is connected to the outer tube unit 100 or the inner core unit 200.

[0187] For Embodiments 1 to 2 and Embodiment 4, the handle unit is connected to the outer tube unit 100.

[0188] In embodiment 3, the handle unit is connected to the inner core unit 200.

[0189] The shape formed by the handle unit and the outer tube unit 100 (inner core unit 200) includes, but is not limited to, a straight shape, a gun shape, etc. The above shapes are all conventional designs in this field and will not be described in detail here.

[0190] The usage method of this embodiment is basically the same as that of Embodiments 1 to 4, and will not be repeated here.

[0191] The technical effects of this embodiment are as follows: 1) The handle unit makes it easy for medical staff to hold the lens puncture and fixation device, which is convenient for operation.

[0192] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A lens puncture and fixation device, characterized in that, include: External tube unit; An inner core unit is movably connected to the outer tube unit and is used to move relative to the outer tube unit so that the distal end of the inner core unit extends into or out of the distal end of the outer tube unit. A claw unit is movably disposed at the distal end of the inner core unit, and is used to follow the relative movement between the inner core unit and the outer tube unit, and to switch between a puncture mode and a clamping mode when located outside the outer tube unit to perform puncture and clamping operations. An outer tube control unit is disposed between the outer tube unit and the inner core unit, and is used to control the outer tube unit to reciprocate along the axial direction of the inner core unit.

2. The lens puncture and fixation device according to claim 1, characterized in that, The outer tube unit includes: An outer tube element, wherein the inner core unit is movably disposed inside the outer tube element and is connected to the outer tube control unit, for reciprocating along the axial direction of the inner core unit under the action of the outer tube control unit.

3. The lens puncture and fixation device according to claim 1, characterized in that, The inner core unit includes: An inner core element is movably disposed inside the outer tube unit, and the claw unit is provided at the end of the inner core element; An outer tube guide element is disposed on the side of the inner core element and is slidably connected to the control end of the outer tube control unit, for the control end of the outer tube control unit to reciprocate along the outer tube guide element.

4. The lens puncture and fixation device according to claim 1, characterized in that, The claw unit includes: A base element, the base element being disposed at the distal end of the inner core unit; A plurality of support elements are arranged at circumferential intervals along the base element; A plurality of claw elements are rotatably disposed on the corresponding support elements for switching between puncture mode and clamping mode to perform puncture and clamping operations. An elastic element is disposed on the base element and connected to a plurality of the claw elements respectively.

5. The lens puncture and fixation device according to claim 1, characterized in that, The outer tube control unit includes: An outer tube control element is disposed on the outer tube unit and slidably connected to the inner core unit, and is used to control the outer tube unit to reciprocate along the axial direction of the inner core unit.

6. The lens puncture and fixation device according to claim 5, characterized in that, The outer tube control element includes: An outer tube guide is disposed on the inner side of the outer tube unit and slidably connected to the inner core unit; An outer tube control component is disposed on the outside of the outer tube unit and connected to the outer tube unit or the outer tube guide component.

7. The lens puncture and fixation device according to any one of claims 1 to 6, characterized in that, Also includes: A handle unit, which is connected to the inner core unit.

Images