Eye forceps for microscopic fundus surgery

Abstract

The present invention relates to an eye forceps for microscopic fundus surgery, belonging to the technical field of ophthalmic surgical instruments. The present invention comprises a forceps core, a sliding assembly, a forceps handle and a reset member, wherein the sliding assembly is installed in the installation channel at the front end of the forceps handle and can axially reciprocate relative to the forceps handle, the sliding assembly comprises a sleeve located at the front end thereof and a driving head located at the rear end thereof, the front end of the forceps core has forceps claws that can be automatically separated, the rear end of the forceps core passes through the sleeve and is fixedly connected to the forceps handle, the sleeve can close the forceps claws as the sliding assembly moves forward, the reset member is arranged in the forceps handle and is used to push the sliding assembly to reset backward, a connecting column is fixedly arranged in the installation channel of the forceps handle, an elastic pressure ring is sleeved on the connecting column, when the elastic pressure ring contracts inwardly, the front end surface of the elastic pressure ring can act on the driving head to move the sliding assembly forward, a pressing operation portion is arranged on the side of the elastic pressure ring, and the forceps handle has a gripping handle through groove corresponding to the pressing operation portion. The present invention can make the operation more convenient.

Description

Technical Field

[0001] The invention relates to an eye forceps for microscopic fundus surgery, belonging to the technical field of ophthalmic surgical instruments. Background Art

[0002] With the improvement of living standards and the rapid development of electronic products, the types and number of eye diseases have also increased significantly. In the diagnosis and treatment of eye diseases, interventional surgery is sometimes required. During the surgery, eye forceps are often needed to clamp intraocular tissues, such as the internal limiting membrane (ILM) and epiretinal membrane (ERM).

[0003] In the existing related technologies, the first one used was an ophthalmic surgical intraocular forceps proposed in the patent document with the announcement number CN2162939Y. The tubular handle is provided with a handle, and a pair of forceps claws have a thin rod-shaped inner core at the rear end. The inner core passes through the sleeve and is tightly matched and fixedly connected with the inner wall of the handle through a fastening block and a tightening screw, so that the inner core is fixed without displacement. The sleeve is tightly matched with the slider, and is connected to the handle through the slider. The front end of the slider is provided with a spring, and the rear end of the slider is provided with an adjustment limit screw, which is used to adjust and limit the moving distance of the sleeve 9, thereby adjusting the tightness of the forceps mouth.

[0004] However, the matching structure between the handle and the tubular handle is not good. When using it, the index finger and thumb need to pinch the handle to control the closing or opening of the front end of the tweezers head to achieve the functions of clamping and releasing. It has defects such as inflexible operation, lag in clamping, and poor feel, which increases the surgical risk to a certain extent.

[0005] Later, some improvement schemes appeared one after another. For example, an ophthalmic surgical instrument proposed in the patent document with publication number CN210138243U and an eye forceps proposed in the patent document with publication number CN214909124U. Although some improvements have been made to the eye forceps from different angles, the handles thereof all adopt a scheme of independently setting an operating handle on the side wall of the gripping handle. The operating methods are similar, and the index finger and thumb are required to pinch the handle to control the closing or opening of the front end of the tweezers head. Therefore, the defects such as the inconvenience of operation mentioned above still exist. Summary of the invention

[0006] In view of the technical problems of existing intraocular forceps such as inflexible handle operation, lag in clamping, and poor feel when used, the purpose of the present invention is to provide an intraocular forceps for microscopic fundus surgery, which can effectively enhance hand grip feedback, reduce the delay in clamping, and be more convenient to operate.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: eye forceps for microscopic fundus surgery, including a forceps core, a sliding component, a forceps handle and a reset member, the sliding component is installed in the installation channel at the front end of the forceps handle, and can axially reciprocate relative to the forceps handle, the sliding component includes a sleeve located at the front end thereof, the front end of the forceps core is provided with forceps claws that can be automatically separated, the rear end of the forceps core passes through the sleeve and is fixedly connected to the forceps handle, the sleeve can close the forceps claws as the sliding component moves forward, the reset member is arranged in the forceps handle and is used to push the sliding component to reset backward; a connecting column is fixedly arranged in the installation channel of the forceps handle, and the axis of the connecting column Coaxial or parallel to the axis of the sleeve, an elastic pressure ring is sleeved on the connecting column, and a pressure ring limiting end face for axially limiting the elastic pressure ring is provided at one end of the connecting column close to the tail of the tweezers handle. The sliding assembly includes a driving head located at its tail end, and the elastic pressure ring can shrink and expand radially along the tweezers handle by relying on its elastic deformation ability. When the elastic pressure ring shrinks inwardly, the front end face of the elastic pressure ring can act on the driving head to move the sliding assembly forward, and a pressing operating part is provided on the side of the elastic pressure ring, and the tweezers handle has a handle through-groove corresponding to the pressing operating part, and the pressing operating part has an outward convex operating part on the outer end face of the handle through-groove.

[0008] In order to make the structure simple and reliable, a preferred solution is that the pressing operation parts are symmetrically distributed relative to the axis of the connecting column.

[0009] In order to make the structure simple and reliable, the preferred solution is: the elastic pressure ring is a hollow cylinder, the cross-section of the elastic pressure ring in the radial direction of the tweezers handle is elliptical, and the cross-section of the elastic pressure ring in the axial direction of the tweezers handle includes a first arc line and a second arc line that are symmetrically distributed relative to the axis of the connecting column.

[0010] In order to make the transmission structure more reliable, a further preferred solution is that the elliptical major axis corresponding to the cross-section of the elastic pressure ring in the radial direction of the tweezers handle coincides with the center plane of the through-groove in the handle, thereby better limiting the rotation of the elastic pressure ring on the connecting column at the tail end.

[0011] To facilitate processing and manufacturing, and to make the transmission structure more reliably stressed, the preferred solution is: the sliding assembly includes a sliding rod that slides with the front section of the tweezers handle, and the front end of the sliding rod has a central through hole for the sleeve to pass through; the outer surface of the rear end of the sleeve is fixed to the central through hole of the sliding rod by gluing; the front section of the inner cavity of the installation channel of the tweezers handle has a stepped limit end face, and the reset member is a spring sleeved on the sliding rod, the rear end of the spring is connected to the front end face of the driving head, and the front end of the spring is connected to the stepped limit end face; the middle side wall of the tweezers handle is screwed with screws arranged radially along the tweezers handle, and at least two screws are arranged at intervals along the circumference of the tweezers handle; the tweezers handle has a screw connecting hole that is compatible with the screw, and the front end of the connecting column has a central through hole for the rear end of the tweezers core to pass through, and the central through hole of the connecting column at least penetrates to the area where the screw connecting hole is located, and the tail end of the screw passes through the screw connecting hole to lock and fix the rear end of the tweezers core.

[0012] In order to make the transmission structure more reliable, the preferred solution is: the front end outer wall of the slide rod has a protruding annular limit end, the annular limit end and the slide rod are an integral structure; the drive head and the rear end of the slide rod are fixed by a threaded connection.

[0013] To facilitate processing and assembly, the preferred solution is: the tweezers handle includes a tweezers handle head, a grip and a tweezers handle tail arranged in sequence from front to back, the stepped limit end face is arranged in the inner cavity of the tweezers handle head, the grip through groove is arranged on the grip, the connecting column is arranged on the front end face of the tweezers handle tail, the tweezers handle head and the grip are fixed by bonding, and the axial hole of the grip is fixed to the tweezers handle tail by a threaded connection.

[0014] For ease of processing and manufacturing, the preferred solution is that the slide bar, the driving head, the head of the forceps handle, the grip and the tail of the forceps handle are all made of 3D printed materials, such as PA nylon. The use of 3D printed materials can realize the 3D printing of intraocular forceps in one piece, which can effectively reduce processing and material costs compared to traditional processing methods.

[0015] In order to make the grip feel better, the preferred solution is: the outer surface of the grip and the outer surface of the tail of the tweezers handle have a frosted layer; and the outer surface of the tail of the tweezers handle is arranged with a transversely curved strip groove.

[0016] To facilitate processing and manufacturing, the preferred solution is: the tweezers core includes tweezers blades and a hollow connecting shaft, the tweezers blades are two pieces arranged in parallel, each tweezers blade is provided with a tweezer claw at the front end, and the tail end of the tweezers blades is inserted into the connecting shaft and then flattened to fix the tweezers blades.

[0017] In order to meet the surgical requirements of patients with high myopia, the preferred solution is: the length of the working end of the forceps core is set to 32mm-38mm. The length of the front end working area of ​​the prior art is short (about 28-31mm), which cannot meet the surgical requirements of patients with high myopia. The present invention loads a 32mm-38mm forceps core to meet the surgical requirements of patients with high myopia.

[0018] The technical solution provided by the present invention has the following beneficial effects:

[0019] (1) An elastic pressure ring coaxially arranged with the tweezers handle is used to drive the sliding assembly to move. The elastic pressure ring is operated by gripping. The tweezers can be grasped and released by directly pressing the driving part of the elastic pressure ring. The structure is simple and reliable. The degree of force can be accurately controlled during use, the feedback is timely, and the stability is high.

[0020] (2) The elastic pressure ring is operated by gripping, and the elastic pressure ring is provided with driving parts symmetrically on both sides. Compared with the traditional structure, it improves the user's perception of the load size, and only requires a small control force from the user to complete the clamping, which reduces the soreness and discomfort of the user's fingers caused by long-term use, reduces the risk of surgery to a certain extent, and reduces the delay, effectively improving the clamping lag.

[0021] (3) The overall structure is simple. The main components such as the slide rod, drive head, tweezer handle head, grip and tweezer handle tail are all made of 3D printed materials. They can be integrally formed through the 3D printing process. Compared with traditional processing methods, it can effectively reduce processing and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the tweezer core in the present invention.

[0025] Figure 4 It is a structural schematic diagram of the sliding component in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the tweezers handle in the present invention.

[0027] Figure 6 It is a schematic structural diagram of the elastic pressure ring in the present invention in the front view direction.

[0028] Figure 7 It is a schematic diagram of the structure of the elastic pressure ring in the present invention when viewed from the side.

[0029] Figure 8 It is a schematic diagram of the working end length described in the present invention.

[0030] Parts markings in the figure: tweezer core 10, sliding assembly 20, tweezer handle 30, elastic pressure ring 40, reset member 50; tweezer blade 101, connecting shaft 102, tweezer claw 103; sleeve 201, sliding rod 202, annular limit end 203, driving head 204; tweezer handle head 301, grip 302, tweezer handle tail 303; pressing operation part 401; connecting column 601, screw 602, pressure ring limit end face 603, step limit end face 604, grip through groove 605, strip groove 606. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figures 1 to 7 As shown, the present invention includes a tweezer core 10, a sliding assembly 20, a tweezer handle 30 and a reset member 50. The sliding assembly 20 is installed in the installation channel at the front end of the tweezer handle 30 and can axially reciprocate relative to the tweezer handle 30. The sliding assembly 20 includes a sleeve 201 located at the front end thereof. The front end of the tweezer core 10 has a tweezer claw 103 that can be automatically separated. The rear end of the tweezer core 10 passes through the sleeve 201 and is fixedly connected to the tweezer handle 30. The sleeve 201 can close the tweezer claw 103 as the sliding assembly 20 moves forward. The reset member 50 is arranged in the tweezer handle 30 and is used to push the sliding assembly 20 to reset backward. A connecting column 601 is fixedly arranged in the installation channel of the tweezer handle 30, and the axis of the connecting column 601 is coaxial or parallel to the axis of the sleeve 201. It can be understood that the connecting column 601 has a slight eccentricity and does not affect the normal use of the eye tweezers. It is preferably coaxial. An elastic pressure ring 40 is sleeved on the connecting column 601, and a pressure ring limiting end face 603 for axially limiting the elastic pressure ring 40 is provided at one end of the connecting column 601 close to the tail of the tweezers handle 30. The sliding assembly 20 includes a driving head 204 located at its tail end. The elastic pressure ring 40 can shrink and expand radially along the tweezers handle 30 by relying on its elastic deformation ability. When the elastic pressure ring 40 shrinks inwardly, the front end face of the elastic pressure ring 40 can act on the driving head 204 to move the sliding assembly 20 forward. A pressing operating part 401 is provided on the side of the elastic pressure ring 40, and the tweezers handle 30 has a handle through groove 605 corresponding to the pressing operating part 401, and the pressing operating part 401 has a convex operating part on the outer end face relative to the handle through groove 605.

[0033] Among them, the material and appearance of the elastic pressure ring 40 only need to meet the technical requirement of "the elastic pressure ring 40 can shrink and expand radially along the forceps handle 30 by relying on its elastic deformation ability, thereby driving the elastic pressure ring 40 to synchronously produce axial expansion". When the elastic pressure ring 40 shrinks radially, the elastic pressure ring 40 synchronously produces axial expansion. Since the tail end has a pressure ring limiting end face 603, the elastic pressure ring 40 can only push the driving head 204 forward to move axially, thereby prompting the sliding assembly 20 to move forward axially as a whole, prompting the forceps claws 103 to close, thereby realizing the grasping function, and at the same time, the reset member 50 is compressed and stores energy. When the operator releases the elastic pressure ring 40, the elastic pressure ring 40 automatically resets, and at the same time, the reset member 50 releases energy to prompt the sliding assembly 20 to reset backward, and the sleeve 201 no longer presses the forceps core 10 as the sliding assembly 20 moves backward, and the forceps claws 103 return to the initial open state, thereby realizing the release function. The elastic pressure ring 40 is operated by holding, and the tweezers can be grasped and released by pressing the driving part of the elastic pressure ring 40. The structure is simple and reliable, the degree of force can be accurately controlled during use, the feedback is timely, and the stability is high.

[0034] The elastic pressure ring 40 is preferably made of polyurethane material. The elastic pressure ring 40 generally adopts a hollow cylinder. In order to make the structure simple and reliable, the preferred appearance scheme is: the elastic pressure ring 40 is a hollow cylinder, the cross-section of the elastic pressure ring 40 in the radial direction of the tweezers handle 30 is elliptical, and the cross-section of the elastic pressure ring 40 in the axial direction of the tweezers handle 30 includes a first arc line and a second arc line symmetrically distributed relative to the axis of the connecting column 601. The arc design is easy to process and has good elastic deformation ability. In order to further improve the elastic deformation ability, a deformation groove can be added to the front end side wall of the elastic pressure ring 40. In addition, in an alternative scheme, the elastic pressure ring 40 can also be composed of a combination of multiple elastic sheets distributed in a ring shape.

[0035] It is understandable that the push operation part 401 may be one or more, preferably more than one, and a further preferred solution is that the push operation part 401 is symmetrically distributed relative to the axis of the connecting column 601. On the one hand, the transmission mechanism can be more reliably stressed, and on the other hand, the gripping operation effect can be improved, and the hand feel is better.

[0036] In order to make the transmission structure more reliable, a further preferred solution is that the elliptical major axis corresponding to the cross-section of the elastic pressure ring 40 in the radial direction of the tweezers handle 30 coincides with the center plane of the handle through-slot 605, thereby better limiting the rotation of the elastic pressure ring 40 on the connecting column 601 at the tail end.

[0037] In order to facilitate processing and manufacturing, and to make the transmission structure more reliable, the preferred solution is: the sliding component 20 includes a slide bar 202 that slides with the front section of the tweezers handle 30, and the front end of the slide bar 202 has a central through hole for the sleeve 201 to pass through; the outer surface of the rear end of the sleeve 201 and the central through hole of the slide bar 202 are fixed by gluing; the front section of the inner cavity of the installation channel of the tweezers handle 30 has a stepped limit end face 604, and the reset member 50 is a spring sleeved on the slide bar 202, and the rear end of the spring is connected to the front end face of the drive head 204 , the front end of the spring is connected to the stepped limit end face 604; the middle side wall of the tweezers handle 30 is threaded with a screw 602 arranged radially along the tweezers handle 30, and at least two screws 602 are arranged at circumferential intervals along the tweezers handle 30; the tweezers handle 30 has a screw connection hole adapted to the screw 602, and the front end of the connecting column 601 has a central through hole for the rear end of the tweezers core 10 to pass through, and the central through hole of the connecting column 601 at least penetrates to the area where the screw connection hole is located, and the tail end of the screw 602 passes through the screw connection hole to lock and fix the rear end of the tweezers core 10.

[0038] In order to make the transmission structure more reliable, the preferred solution is: the front end outer wall of the slide rod 202 has a protruding annular limit end 203, which can control the retraction stroke of the sliding assembly 20 to improve reliability. In order to facilitate processing and assembly and effectively ensure the connection strength, the annular limit end 203 and the slide rod 202 are preferably an integrated structure; the drive head 204 and the rear end of the slide rod 202 are fixed by threaded connection (that is, the drive head 204 has an internal thread through hole, and the rear end of the slide rod 202 has an external thread matching it).

[0039] For the convenience of processing and assembly, the preferred solution is: the tweezers handle 30 includes a tweezers handle head 301, a grip 302 and a tweezers handle tail 303 arranged in sequence from front to back, a stepped limit end face 604 is arranged in the inner cavity of the tweezers handle head 301, a grip through groove 605 is arranged on the grip 302, a connecting column 601 is arranged on the front end surface of the tweezers handle tail 303, the tweezers handle head 301 and the grip 302 are fixed by bonding, and the axial hole of the grip 302 and the tweezers handle tail 303 are fixed by threaded connection (that is, the axial hole of the grip 302 has an internal thread, and the tweezers handle tail 303 has an external thread that matches it). The screw connection hole used to assemble the screw 602 is generally designed in the threaded connection part between the grip 302 and the tweezers handle tail 303.

[0040] For ease of processing and manufacturing, the preferred solution is that the slide bar 202, the drive head 204, the forceps handle head 301, the grip 302 and the forceps handle tail 303 are all made of 3D printed materials, such as PA12 nylon. The use of 3D printed materials can realize the 3D printing of intraocular forceps in one piece, which can effectively reduce processing and material costs compared to traditional processing methods.

[0041] In order to make the grip feel better, the preferred solution is: the outer surface of the handle 302 and the outer surface of the tail 303 of the forceps handle have a frosted layer; the outer surface of the tail 303 of the forceps handle is arranged with a transversely curved strip groove 606. The frosted outer surface improves the friction coefficient of the forceps handle 30 to a certain extent, reducing the surgical risk caused by the sliding of the instrument during the operation.

[0042] Compared with the commonly used retinal forceps, the working end length of the forceps core 10 of the present invention is set to 32mm-38mm, which meets the surgical needs of patients with high myopia. Figure 8 100 shown.

[0043] To facilitate processing and manufacturing, the preferred solution is: the tweezers core 10 includes tweezers 101 and a hollow connecting shaft 102, the tweezers 101 are two pieces arranged in parallel, and a tweezer claw 103 is provided at the front end of each tweezers 101. After the tail end of the tweezers 101 is inserted into the connecting shaft 102, it is flattened to fix the tweezers 101.

Claims

1. Eye forceps for microscopic fundus surgery, comprising a forceps core (10), a sliding assembly (20), a forceps handle (30) and a reset member (50), wherein the sliding assembly (20) is installed in a mounting channel at the front end of the forceps handle (30) and can axially reciprocate relative to the forceps handle (30), the sliding assembly (20) comprises a sleeve (201) located at the front end thereof, the front end of the forceps core (10) is provided with forceps claws (103) that can be automatically separated, the rear end of the forceps core (10) passes through the sleeve (201) and is fixedly connected to the forceps handle (30), the sleeve (201) can close the forceps claws (103) as the sliding assembly (20) moves forward, and the reset member (50) is arranged in the forceps handle (30) and is used to push the sliding assembly (20) to reset backward; characterized in that: A connecting column (601) is fixedly arranged in the installation channel of the tweezers handle (30), the axis of the connecting column (601) is coaxial or parallel to the axis of the sleeve (201), an elastic pressure ring (40) is sleeved on the connecting column (601), and a pressure ring limiting end face (603) for axially limiting the elastic pressure ring (40) is arranged at one end of the connecting column (601) close to the tail of the tweezers handle (30), the sliding assembly (20) includes a driving head (204) located at its tail end, and the elastic pressure ring (40) relies on its elastic shape to limit the axial position of the elastic pressure ring (40). The forceps handle (30) can be contracted and expanded radially, and when the elastic pressure ring (40) contracts inwardly, the front end surface of the elastic pressure ring (40) can act on the driving head (204) to move the sliding assembly (20) forward. A pressing operation part (401) is provided on the side of the elastic pressure ring (40). The forceps handle (30) has a handle through-groove (605) corresponding to the pressing operation part (401). The pressing operation part (401) has an outward convex operation part on the outer end surface relative to the handle through-groove (605). The pressing operation portion (401) is symmetrically distributed relative to the axis of the connecting column (601); The elastic pressure ring (40) is a hollow cylindrical body. The cross section of the elastic pressure ring (40) in the radial direction of the forceps handle (30) is elliptical. The cross section of the elastic pressure ring (40) in the axial direction of the forceps handle (30) includes a first arc line and a second arc line that are symmetrically distributed relative to the axis of the connecting column (601). In the cross section in the radial direction of the forceps handle (30), the pressing operation part (401) is located at both ends of the elliptical long axis of the elastic pressure ring (40). The elliptical major axis corresponding to the cross section of the elastic pressure ring (40) in the radial direction of the forceps handle (30) coincides with the center plane of the handle through-groove (605), so as to limit the elastic pressure ring (40) from rotating on the connecting column (601); The sliding assembly (20) comprises a sliding rod (202) which is slidably matched with the front section of the tweezers handle (30); the front end of the sliding rod (202) has a central through hole for the sleeve (201) to pass through; the outer surface of the rear end of the sleeve (201) and the central through hole of the sliding rod (202) are fixed by gluing; the inner cavity of the front section of the installation channel of the tweezers handle (30) has a stepped limit end surface (604); the reset member (50) is a spring sleeved on the sliding rod (202); the rear end of the spring is connected to the front end surface of the driving head (204), and the front end of the spring is connected to the stepped limit end surface (604). 4) connected; the middle side wall of the tweezers handle (30) is screwed with a screw (602) arranged radially along the tweezers handle (30), and at least two screws (602) are arranged at intervals along the circumference of the tweezers handle (30); the tweezers handle (30) has a screw connection hole adapted to the screw (602), the front end of the connecting column (601) has a central through hole for the rear end of the tweezers core (10) to pass through, the central through hole of the connecting column (601) at least penetrates to the area where the screw connection hole is located, and the rear end of the screw (602) is locked and fixed after passing through the screw connection hole; The front end outer wall of the slide rod (202) has a protruding annular limiting end head (203), and the annular limiting end head (203) and the slide rod (202) are an integral structure; the driving head (204) and the rear end of the slide rod (202) are fixed by threaded connection; The tweezers handle (30) comprises a tweezers handle head (301), a grip (302) and a tweezers handle tail (303) which are arranged in sequence from front to back, a stepped limiting end surface (604) is arranged in the inner cavity of the tweezers handle head (301), a grip through groove (605) is arranged on the grip (302), a connecting column (601) is arranged on the front end surface of the tweezers handle tail (303), the tweezers handle head (301) and the grip (302) are fixed by bonding, and an axial center hole of the grip (302) and the tweezers handle tail (303) are fixed by threaded connection.

2. The eye forceps for microscopic fundus surgery according to claim 1, characterized in that: The slide bar (202), the drive head (204), the tweezer handle head (301), the grip (302) and the tweezer handle tail (303) are all made of 3D printed materials; the outer surface of the grip (302) and the outer surface of the tweezer handle tail (303) have a frosted layer; and the outer surface of the tweezer handle tail (303) is arranged with a transversely curved strip groove (606).

3. The eye forceps for microscopic fundus surgery according to claim 1, characterized in that: The tweezer core (10) comprises tweezer blades (101) and a connecting shaft (102) of a hollow structure. The tweezer blades (101) are two pieces arranged in parallel. A tweezer claw (103) is arranged at the front end of each tweezer blade (101). After the rear end of the tweezer blade (101) is inserted into the connecting shaft (102), it is flattened to fix the tweezer blade (101).

4. The eye forceps for microscopic fundus surgery according to any one of claims 1 to 3, characterized in that: The working end length of the eye forceps is set to 32mm-38mm.

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