CN115844629A - Ophthalmic forceps based on rear driving structure - Google Patents
Ophthalmic forceps based on rear driving structure Download PDFInfo
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- CN115844629A CN115844629A CN202211661048.8A CN202211661048A CN115844629A CN 115844629 A CN115844629 A CN 115844629A CN 202211661048 A CN202211661048 A CN 202211661048A CN 115844629 A CN115844629 A CN 115844629A
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Abstract
The invention relates to an ophthalmic forceps based on a rear driving structure, and belongs to the technical field of ophthalmic surgical instruments. The tweezers comprises a tweezers core, a sliding assembly, a tweezers handle and a resetting piece, wherein the sliding assembly is arranged in an installation channel at the front end of the tweezers handle and can axially reciprocate relative to the tweezers handle, the sliding assembly comprises a sleeve positioned at the front end of the sliding assembly, the front end of the tweezers core is provided with automatically separable tweezers claws, the rear end of the tweezers core penetrates through the sleeve and is fixedly connected with the tweezers handle, the sleeve can close the tweezers claws as the sliding assembly moves forwards, the resetting piece is arranged at the rear end of an inner cavity of the tweezers handle and is used for pushing the sliding assembly to reset backwards, a plurality of deformation grooves are formed in the side wall of the front end of the installation channel of the tweezers handle at intervals along the circumferential direction of the installation channel, the deformation grooves penetrate through the front end face of the tweezers handle, the side wall of the installation channel of the tweezers handle is divided into a multi-petal driving head, the front end of the driving head is provided with a driving surface, and the sliding assembly is provided with a driven driving surface matched with the driving surface. The invention can make the operation more convenient.
Description
Technical Field
The invention relates to an ophthalmic forceps based on a rear driving structure, and belongs to the technical field of ophthalmic surgical instruments.
Background
With the improvement of living standard and the rapid development of electronic products, the types and the number of eye diseases of people are also greatly increased. In the process of diagnosing and treating eye diseases, intervention operation is sometimes needed to be completed, and in the operation process, intraocular tissues such as an Inner Limiting Membrane (ILM), an epiretinal membrane (ERM) and the like are often needed to be clamped by the aid of the ophthalmic forceps.
In the related art, the first one is provided with a pair of forceps jaws with a thin rod-shaped inner core at the rear end, which passes through a sleeve and is fixedly connected with the inner wall of the handle through a fastening block and a fastening screw in a tight fit manner, so that the inner core is fixed without displacement. The sleeve is tightly matched with the sliding block and is connected with the handle through the sliding block, the front end of the sliding block is provided with a spring, and the rear end of the sliding block is provided with an adjusting limit screw for adjusting and limiting the moving distance of the sleeve 9, so that the forceps tightness of the forceps opening is adjusted.
However, the matching structure between the handle and the tubular handle is not good, when in use, the handle needs to be pinched by the forefinger and the thumb to control the closing or opening of the front end of the forceps head so as to realize the clamping and releasing functions, and the defects of inflexible operation, hysteresis in clamping, poor hand feeling in use and the like exist, and the operation risk is increased to a certain extent.
Later, some improvements have been made, for example, an ophthalmologic surgical instrument proposed in patent document No. CN210138243U, an ophthalmic forceps proposed in patent document No. CN214909124U, although some improvements are made to the ophthalmic forceps from different angles, the handles of the forceps are all solutions in which an operation handle is independently arranged on the side wall of the holding handle, the operation method is different, and the handles are all held by the forefinger and the thumb to control the closing or opening of the front end of the forceps head, so the aforementioned drawbacks of inconvenient operation still exist.
In addition, present clinical intraocular tweezers, its drive reset piece (spring) all set up in the handle front end, and the structure that resets is driven in the front to tweezers clamp adoption, and this project organization can cause tweezers front end structure too big, and during the operation, front end tweezers go deep into the eyeball, and then front end structure can be great to the oppression that the eyeball caused, and shelter from the operation sight, and it is longer also can cause the force feedback time simultaneously, is unfavorable for the operation.
Disclosure of Invention
Aiming at the technical problems of inflexible handle operation, hysteretic clamping, poor hand feeling in use, overlarge structure of the front end of the forceps and the like of the existing intraocular forceps, the invention aims to provide the forceps for eyes based on the rear driving structure, the forceps for eyes can effectively enhance the feedback of the hand holding force, reduce the clamping delay of the forceps clamps, be more convenient to operate, and simultaneously can obviously reduce the compression on eyeballs during operation and ensure the operation visual field.
In order to solve the technical problems, the invention adopts the technical scheme that: the back driving structure-based eye forceps comprise a forceps core, a sliding assembly, a forceps handle and a reset piece, wherein the sliding assembly is installed in an 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 at the front end of the sliding assembly, the front end of the forceps core is provided with a forceps claw capable of being automatically separated, the rear end of the forceps core penetrates through the sleeve and then is fixedly connected with the forceps handle, the sleeve can close the forceps claw along with the forward movement of the sliding assembly, the reset piece is arranged at the rear end of an inner cavity of the forceps handle and used for pushing the sliding assembly to reset backwards, a plurality of deformation grooves are formed in the side wall of the front end of the installation channel of the forceps handle at intervals along the circumferential direction of the side wall, the deformation grooves penetrate through the front end face of the forceps handle, the side wall of the front end of the installation channel of the forceps handle is divided into a multi-petal driving head, the front end of the driving head is provided with a driving surface, the sliding assembly comprises a driving ring, the driving ring is provided with a driven surface matched with the driving surface, the driving ring can radially contract and expand along the driving surface of the forceps handle by virtue of the elastic capability of the driving ring, and the driving ring can act on the driving surface of the driving assembly when the driving ring to contract inwards contract.
In order to enhance the feedback effect of the hand holding force and ensure better hand holding feeling, the preferred proposal is as follows: the driving head comprises a first arc-shaped structure and a second arc-shaped structure which are sequentially arranged from front to back, the first arc-shaped structure and the second arc-shaped structure are coaxially arranged and distributed in a circular ring shape, the outer surface of the forceps handle is provided with an inwards concave structure, and the connecting portions of the first arc-shaped structure and the second arc-shaped structure form a ring-shaped protruding edge on the outer surface of the forceps handle. In the prior art, the force feedback time for closing the forceps clip at the front end by pressing the corresponding driving piece is longer, usually 0.5-0.8 s, the annular rib is formed by the connecting part of the first cambered surface structure and the second cambered surface structure, the first cambered surface structure is pressed during the operation, and the pressing force is gathered on the annular rib, so that the force feedback effect is enhanced, the time delay is reduced, and the clamping hysteresis is effectively improved. Further preferably, the diameter of the front end of the first cambered surface structure is larger than that of the annular convex rib, and the diameter of the annular convex rib is larger than that of the tail end of the second cambered surface structure, so that the rear end of the ophthalmic forceps is more close to the hand shape when in use, and the operation is convenient. Further, the inner included angle of the annular rib is preferably 60 to 120 deg., and a better force concentrating effect is obtained in the angle range.
In order to further ensure the force feedback effect, the preferable scheme is as follows: the transmission ratio of the pressing driving head to the driving ring is 1.5-3: 1, the transmission ratio is the radial movement distance of the driving head: the axial movement distance of the drive ring. More preferably, the drive ring is driven by the pressing drive head at a transmission ratio of 2:1.
in order to ensure that the stress of the transmission structure is more reliable, the preferable scheme is as follows: the sliding assembly comprises a front cover and a main shaft, wherein the front end of the front cover is provided with a central through hole for the sleeve to pass through; the outer surface of the rear end of the sleeve is fixed with the central through hole of the front cover in a gluing mode; the rear end of the front cover is provided with a step hole with a large outer part and a small inner part, the small inner end hole of the step hole is provided with a threaded hole, the front end of the main shaft is fixed with the threaded hole in a threaded manner, the driving ring is sleeved on the main shaft, and the front end of the driving ring is contacted with a step surface in the step hole; the middle part of the mounting channel of the forceps handle is provided with a partition plate which is arranged along the radial direction of the forceps handle, the partition plate is provided with a guide hole for a main shaft to pass through, the tail end of the main shaft is provided with a limit end head, the reset piece is a spring which is sleeved on the main shaft, one end of the spring is connected with the limit end head, and the other end of the spring is connected with the partition plate; the side wall of the middle part of the forceps handle is in threaded connection with at least two screws arranged along the radial direction of the forceps handle at intervals along the circumferential direction of the forceps handle; the front side region of division board is located to the screw, and the main shaft has the bar keyway that supplies the screw to pass, and the length direction of bar keyway is unanimous with the axis direction of main shaft, and the main shaft front end has the central through-hole that supplies tweezers core rear end to pass, and the central through-hole of main shaft runs through to bar keyway place region at least, and the tail end of screw passes behind the bar keyway and fixes tweezers core rear end locking.
In order to make the transmission structure more reliably stressed, the preferable scheme is as follows: an anti-rotation structure is arranged between the driving ring and the main shaft and comprises a convex key arranged on the main shaft and a second key groove arranged on the driving ring.
For the convenience of assembling the spring, the preferable scheme is as follows: the limiting end is elastic flap wings which are arranged along the circumferential direction of the main shaft at intervals, and the elastic flap wings can contract and expand outwards along the radial direction of the main shaft by means of the elastic deformation capacity of the elastic flap wings.
In order to make the transmission structure more reliably stressed, the preferable scheme is as follows: the main shaft is provided with an axial backward movement stroke limiting surface matched with the front end surface of the partition plate.
For convenient assembly and convenient holding operation, the preferable scheme is as follows: the tail end of the forceps handle is provided with a threaded through hole arranged along the axial direction of the forceps handle, the inner end of the threaded through hole penetrates through the mounting channel of the forceps handle, and the forceps tail is fixed to the threaded through hole in a threaded connection mode; an annular mounting groove is formed in the outer surface of the rear end of the forceps tail, and an O-shaped ring is clamped in the mounting groove.
For the convenience of processing and manufacturing and the convenience of holding operation, the preferred scheme is as follows: the forceps handle and the forceps tail are made of 3D printing materials, such as PA12 nylon; the outer surface of the forceps handle is provided with a frosted treatment layer. The outer surface of the forceps handle is frosted, so that the friction coefficient of the forceps handle can be improved, and the surgical risk caused by the sliding of instruments in the surgical process is reduced. Adopt 3D to print the material and can realize that intraocular tweezers 3D prints integrated into one piece, compare in traditional processing mode, can effectively process and material cost.
In order to make the structure simple and reliable, the preferred scheme is: the driving head is 3 to 9 lobes which are distributed at uniform intervals, and more preferably three lobes which are distributed at uniform intervals. The forceps handle in the three-petal form is higher in structural strength, better in fit feeling with hand skin of a user, capable of accurately controlling force exertion degree during use, timely in feedback and higher in stability.
In order to meet the operation requirements of the high myopia patients, the preferable scheme is as follows: the length of the working end of the forceps core is set to be 32mm-38mm. The front end working area in the prior art is short in size and length (about 28-31 mm) and cannot meet the operation requirement of a patient with high myopia, and a forceps core with the size of 32mm-38mm is loaded to meet the operation requirement of the patient with high myopia.
The technical scheme provided by the invention has the following beneficial effects:
(1) The invention provides rear-drive-structure-based ophthalmic forceps, wherein the front end of a forceps handle is a multi-petal-type drive head to form multi-point drive in annular distribution, the drive head is operated in a holding mode, the drive head is pressed to axially slide along with a sleeve in a sliding assembly to extrude two forceps claws at the front end of a forceps core, so that the grasping and releasing of the forceps are realized, the multi-petal-type forceps handle is designed, the structure is reliable, the force application degree can be accurately controlled during use, the feedback is timely, the stability is higher, meanwhile, the multi-petal-type forceps handle is well attached to the hand skin of a user, and the use and the operation are convenient.
(2) The rear-drive-structure-based ophthalmic forceps provided by the invention adopt the annular bamboo joint type driving head consisting of the first arc-shaped structure and the second arc-shaped structure which are coaxially arranged and distributed in an annular shape, the pressing force can be gathered at the annular convex edge at the joint of the first arc-shaped structure and the second arc-shaped structure, the sensing of a user on the size of a loaded load is improved compared with the traditional structure, the clamping can be completed only by a small control force of the user, the acid-soft discomfort of fingers caused by the long-time use of the user is reduced, the risk of an operation is reduced to a certain extent, the time delay is reduced, and the clamping hysteresis is effectively improved.
(3) According to the pair of eye forceps based on the rear driving structure, the reset piece is innovatively arranged at the rear end of the inner cavity of the forceps handle and connected with the tail end of the sliding assembly, and compared with the front driving reset structure in the prior art, the size of the front end of the pair of eye forceps can be reduced, so that the compression of the front end structure on eyeballs during operation is reduced, and the operation visual field is enlarged.
(4) The rear-drive-structure-based eye forceps provided by the invention is simple in overall structure, the forceps handle and the forceps tail are made of 3D printing materials, and the forceps handle and the forceps tail can be integrally formed through a 3D printing process, so that compared with a traditional processing mode, the rear-drive-structure-based eye forceps can be effectively processed and has low material cost.
Drawings
Fig. 1 is a three-dimensional schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic cross-sectional structure of the present invention.
Fig. 3 is a three-dimensional schematic view of the spindle of the present invention.
Fig. 4 is a schematic sectional view of the spindle of the present invention.
Fig. 5 is a schematic length view of the working end of the present invention.
Parts in the figures are labeled: a forceps core 10, a sliding component 20, a forceps handle 30, a resetting piece 40 and a forceps tail 50; a sleeve 201, a front cover 202, a driving ring 203, a driven driving surface 204, a main shaft 205, a limit tip 206, a strip-shaped key groove 207, a convex key 208, a second key groove 209, a front cover inner cavity acting surface 210 and a driving ring front end concave cavity 211; deformation groove 301, driving head 302, driving surface 303, partition plate 304, screw 305; an O-ring 501.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1 to 4, the forceps core 10, the sliding assembly 20, the forceps handle 30 and the resetting member 40 are included in the present invention, the sliding assembly 20 is installed in the installation channel at the front end of the forceps handle 30 and can axially reciprocate relative to the forceps handle 30, the sliding assembly 20 includes a sleeve 201 at the front end thereof, the front end of the forceps core 10 has forceps jaws capable of automatically separating, the rear end of the forceps core 10 passes through the sleeve 201 and is fixedly connected with the forceps handle 30, the sleeve 201 can close the forceps jaws as the sliding assembly 20 moves forward, the resetting member 40 is disposed in the forceps handle 30 and is used for pushing the sliding assembly 20 to reset backwards, the front end side wall of the installation channel of the forceps handle 30 is circumferentially provided with a plurality of deformation grooves 301, the deformation grooves 301 penetrate through the front end face of the forceps handle 30, the deformation grooves 301 divide the front end side wall of the forceps handle 30 into a multi-petal driving head 302, the front end of the driving head 302 has a driving surface 303, the sliding assembly 20 includes a driving ring 203, the driving ring 203 has a driving surface 204 matched with a driven driving surface 204 which is capable of radially contracting along the driving surface of the driving shaft and can move along the driving surface of the driving shaft assembly 20 to compress and retract along the driving surface 204. When in use, the driving head 302 is operated in a holding mode, and an operator only needs to lightly hold the forceps handle 30 and squeeze the driving head 302 inwards; by pressing the force bearing area on the outer surface of the driving head 302, the front end of the forceps handle 103 is contracted radially, so as to press the driving ring 203, the driving ring 203 pushes the sliding assembly 102 to slide forwards in the axial direction, and the sleeve 201 moves forwards along with the sliding assembly 20 to close the forceps jaws. Adopt the operation of gripping formula, the usable palm of operating personnel and many fingers exert the effort jointly, press drive head 302 along with the axial slip production of sleeve pipe 201 in the slip subassembly 20 to the extrusion of two tweezers claws of tweezers core 10 front end, realize grabbing and releasing of tweezers, the tweezers handle design of multilobe form, the structure is reliable, but accurate control power degree when using, the feedback is timely, and stability is higher, and multilobe form is good with user's the laminating of hand skin simultaneously, use convenient operation. The reset piece 40 is arranged at the rear end of the inner cavity of the forceps handle 30 and connected with the tail end of the sliding assembly 20, and compared with the front-end driving reset structure in the prior art, the size of the front end of the forceps for eyes can be reduced, so that the compression of the front-end structure on eyeballs during operation is reduced, and the operation visual field is enlarged.
The driving surface 303 and the driven driving surface 204 may meet the technical requirement of converting a radial acting force into an axial acting force, and may be a combination of an arc surface and an arc surface, a combination of an inclined surface and an inclined surface, a combination of an inclined surface and an arc surface, and the like. The driven driving surfaces 204 may be in one-to-one correspondence with the driving surfaces 303, or may be an integral structure in which the driven driving surfaces 204 are provided in a circular ring shape. In this embodiment, the driven driving surface 204 is preferably a bevel of conical configuration, and the driving surface 303 is preferably an arc surface that is convex.
The outer surface stress zone of the driving head 302 only needs to meet the technical requirement that the driving head 302 can contract and expand along the radial direction of the forceps handle 30 by means of the elastic deformation capacity of the driving head, and generally can be in a conical surface structure, of course, an arc concave surface can also be arranged on the conical surface structure, and in addition, the combination of a plurality of conical surfaces or the combination of a plurality of arc surfaces can also be adopted. In order to enhance the feedback effect of the hand grip force and to make the hand grip feel better, in this embodiment, the preferable scheme is: the driving head 302 comprises a first arc-shaped structure and a second arc-shaped structure which are sequentially arranged from front to back, the first arc-shaped structure and the second arc-shaped structure are coaxially arranged and distributed in a circular ring shape, the outer surface of the forceps handle 30 of the first arc-shaped structure and the outer surface of the forceps handle 30 of the second arc-shaped structure are both concave structures, and the connecting parts of the first arc-shaped structure and the second arc-shaped structure form annular protruding ridges on the outer surface of the forceps handle 30. Further preferably, the diameter of the front end of the first cambered surface structure is larger than that of the annular convex rib, and the diameter of the annular convex rib is larger than that of the tail end of the second cambered surface structure, so that the rear end of the ophthalmic forceps is more close to the hand shape when in use, and the operation is convenient. Further, the inner included angle of the annular rib is preferably 60 to 120 °, and a better force concentrating effect is obtained in the angle range.
In order to further ensure the force feedback effect, the preferable scheme is as follows: the transmission ratio of the pressing driving head 302 to the driving ring 203 is 1.5-3: 1, the transmission ratio is the radial movement distance of the drive head 302: the axial movement distance of the drive ring 203. The transmission ratio of the pressing drive head 302 to drive the drive ring 203 in this embodiment is 2:1.
it will be appreciated that the drive head 302 may be designed in any number of numbers, and for simple and reliable construction, the preferred solution is: the driving head 302 has 3 to 9 lobes which are uniformly spaced apart, and in this embodiment, has three lobes which are uniformly spaced apart. The forceps handle in the three-petal form is higher in structural strength, better in fit feeling with the hand skin of a user, capable of accurately controlling the force exertion degree during use, timely in feedback and higher in stability.
In order to make the transmission structure more reliably stressed, the preferable scheme is as follows: the sliding assembly 20 comprises a front cover 202 and a main shaft 205, wherein the front end of the front cover 202 is provided with a central through hole for the sleeve 201 to pass through; the outer surface of the rear end of the sleeve 201 is fixed with the central through hole of the front cover 202 in a gluing mode; the rear end of the front cover 202 is provided with a stepped hole with a large outer part and a small inner part, the small hole at the inner end of the stepped hole is provided with a threaded hole, the front end of the main shaft 205 is fixed with the threaded hole in a screwing way, the driving ring 203 is sleeved on the main shaft 205, the front end of the driving ring 203 is contacted with a stepped surface (namely, a front cover inner cavity acting surface 210 shown in fig. 2) in the stepped hole, and the front end of the driving ring 203 is preferably provided with a concave structure (see a driving ring front end concave cavity 211 shown in fig. 2) for facilitating the conduction of acting force; the middle part of the mounting channel of the forceps handle 30 is provided with a partition plate 304 which is arranged along the radial direction of the forceps handle 30, the partition plate 304 is provided with a guide hole for the main shaft 205 to pass through, the tail end of the main shaft 205 is provided with a limit end head 206, the reset piece 40 is a spring which is sleeved on the main shaft 205, one end of the spring is connected with the limit end head 206, and the other end of the spring is connected with the partition plate 304; the side wall of the middle part of the forceps handle 30 is screwed with at least two screws 305 arranged along the radial direction of the forceps handle 30, and the screws 305 are arranged at intervals along the circumferential direction of the forceps handle 30; the screw 305 is arranged in the front side area of the partition plate 304, the spindle 205 is provided with a strip-shaped key slot 207 for the screw 305 to pass through, the length direction of the strip-shaped key slot 207 is consistent with the axial direction of the spindle 205, the front end of the spindle 205 is provided with a central through hole for the rear end of the tweezer core 10 to pass through, the central through hole of the spindle 205 at least penetrates through the area where the strip-shaped key slot 207 is located, and the rear end of the screw 305 passes through the strip-shaped key slot 207 to lock and fix the rear end of the tweezer core 10. In implementation, the spring is stored after the forceps handle 30 is pressed to push the main shaft 205 to axially slide, and after the forceps handle 30 is loosened, the accumulated energy is released by the spring to reset the main shaft 205. The number of screws 305 may be any number, and two screws are generally arranged symmetrically for simple and reliable structure.
In order to make the transmission structure more reliably stressed, the preferable scheme is as follows: an anti-rotation structure is provided between the drive ring 203 and the main shaft 205, and includes a convex key 208 provided on the main shaft 205 and a second key groove 209 provided on the drive ring 203. Specifically, second keyway 209 may be a through-groove structure that radially penetrates drive ring 203.
For the convenience of assembling the spring, the preferable scheme is as follows: the limit ends 206 are elastic flaps arranged along the circumference of the main shaft 205 at intervals, and the elastic flaps can radially contract and expand along the main shaft 205 by virtue of the elastic deformation capacity of the elastic flaps. When the spring is installed, the spring is installed by extruding the elastic valve wings, the elastic valve wings automatically reset after the spring is installed, and the end surfaces of the elastic valve wings limit the spring. Of course, the limit tip 206 may be replaced by a nut.
In order to make the transmission structure more reliably stressed, the preferable scheme is as follows: the main shaft 205 is provided with an axial backward movement stroke limiting surface matched with the front end surface of the separation plate 304. This structure can restrict the rearward movement stroke of the slide module 20, improving reliability.
For convenient assembly and convenient holding operation, the preferable scheme is as follows: the tail end of the forceps handle 30 is provided with a threaded through hole arranged along the axial direction of the forceps handle, the inner end of the threaded through hole penetrates through the installation channel of the forceps handle 30, and the forceps tail 50 is fixed in the threaded through hole in a threaded manner; the outer surface of the rear end of the forceps tail 50 is provided with an annular mounting groove, and an O-shaped ring 51 is clamped in the mounting groove. Wherein, the mounting groove generally can adopt the arc structure, and the screw thread through-hole can regard as the mounting channel of main shaft 205 end structure, and O shape circle 51 can play anti-skidding effect, improves the security in the use.
For the convenience of processing and manufacturing and the convenience of holding operation, the preferred scheme is as follows: the forceps handle 30 and the forceps tail 50 are made of 3D printing materials, such as PA12 nylon; the outer surface of the forceps handle 30 is provided with a frosted treatment layer. Adopt 3D to print the material and can realize that tweezers 3D in the eye prints integrated into one piece, compare in traditional processing mode, can effectively process and material cost. The outer surface of the forceps handle 30 is frosted, so that the friction coefficient of the forceps handle 30 is improved to a certain extent, and the surgical risk caused by the sliding of instruments in the surgical process is reduced.
Compared with the length of the working end of the commonly used retinal forceps of 28mm-31mm, the length of the working end of the forceps core 10 is set to be 32mm-38mm, so that the surgical requirements of patients with high myopia are met. Wherein the working end length is shown at 100 in figure 5.
Claims (10)
1. Tweezers for eyes based on back drive structure, including tweezers core (10), slip subassembly (20), tweezers handle (30) and reset piece (40), slip subassembly (20) are installed in the installation passageway of tweezers handle (30) front end to but for tweezers handle (30) axial reciprocating motion, slip subassembly (20) are including sleeve pipe (201) that are located its front end, tweezers core (10) front end has can be automatic divided tweezers claw, tweezers core (10) rear end pass behind sleeve pipe (201) with tweezers handle (30) fixed connection, sleeve pipe (201) can make the tweezers claw close along with slip subassembly (20) antedisplacement, its characterized in that: the resetting piece (40) is arranged at the rear end of the inner cavity of the forceps handle (30) and is used for pushing the sliding assembly (20) to reset backwards; the side wall of the front end of the mounting channel of the forceps handle (30) is provided with a plurality of deformation grooves (301) at intervals along the circumferential direction of the side wall, the deformation grooves (301) penetrate through the front end face of the forceps handle (30), the side wall of the front end of the mounting channel of the forceps handle (30) is divided into a multi-petal driving head (302) by the deformation grooves (301), the front end of the driving head (302) is provided with a driving surface (303), the sliding assembly (20) comprises a driving ring (203), the driving ring (203) is provided with a driven driving surface (204) matched with the driving surface, the driving head (302) can contract and expand along the radial direction of the forceps handle (30) by means of the elastic deformation capacity of the driving head, and when the driving head (302) contracts inwards, the driving surface (303) can act on the driven driving surface (204) to enable the sliding assembly (20) to move forwards.
2. The ophthalmic forceps based on a rear drive structure of claim 1, wherein: the driving head (302) comprises a first arc-shaped structure and a second arc-shaped structure which are sequentially arranged from front to back, the first arc-shaped structure and the second arc-shaped structure are coaxially arranged and distributed in a circular ring shape, the outer surface of the forceps handle (30) is provided with an inwards concave structure, and the outer surface of the forceps handle (30) is provided with a ring-shaped protruding edge by the connecting part of the first arc-shaped structure and the second arc-shaped structure.
3. The ophthalmic forceps based on a rear drive structure as claimed in claim 2, wherein: the inner included angle of the annular convex edge is 60-120 degrees.
4. The ophthalmic forceps based on a rear drive structure of claim 1, wherein: the transmission ratio of the pressing driving head (302) to the driving ring (203) is 1.5-3: 1, the transmission ratio being the radial movement distance of the drive head (302): the axial movement distance of the drive ring (203).
5. The ophthalmic forceps based on a rear drive structure of claim 1, wherein: the sliding assembly (20) comprises a front cover (202) and a main shaft (205), wherein the front end of the front cover (202) is provided with a central through hole for the sleeve (201) to pass through; the outer surface of the rear end of the sleeve (201) is fixed with the central through hole of the front cover (202) in a gluing mode; the rear end of the front cover (202) is provided with a step hole with a large outer part and a small inner part, the small inner end hole of the step hole is a threaded hole, the front end of the main shaft (205) is fixed with the threaded hole in a threaded manner, the driving ring (203) is sleeved on the main shaft (205), and the front end of the driving ring (203) is contacted with a step surface in the step hole; the middle part of the mounting channel of the forceps handle (30) is provided with a partition plate (304) which is arranged along the radial direction of the forceps handle (30), the partition plate (304) is provided with a guide hole for the main shaft (205) to pass through, the tail end of the main shaft (205) is provided with a limit end head (206), the reset piece (40) is a spring which is sleeved on the main shaft (205), one end of the spring is connected with the limit end head (206), and the other end of the spring is connected with the partition plate (304); the middle side wall of the forceps handle (30) is in threaded connection with at least two screws (305) which are arranged along the radial direction of the forceps handle (30), and the screws (305) are arranged at intervals along the circumferential direction of the forceps handle (30); the screw (305) is arranged in the front side area of the partition plate (304), the main shaft (205) is provided with a strip-shaped key groove (207) for the screw (305) to pass through, the length direction of the strip-shaped key groove (207) is consistent with the axial direction of the main shaft (205), the front end of the main shaft (205) is provided with a central through hole for the rear end of the forceps core (10) to pass through, the central through hole of the main shaft (205) at least penetrates through the area where the strip-shaped key groove (207) is located, and the rear end of the screw (305) penetrates through the strip-shaped key groove (207) to lock and fix the rear end of the forceps core (10).
6. The ophthalmic forceps based on a rear drive structure as claimed in claim 5, wherein: an anti-rotation structure is arranged between the driving ring (203) and the main shaft (205), and comprises a convex key (208) arranged on the main shaft (205) and a second key groove (209) arranged on the driving ring (203); the main shaft (205) is provided with an axial backward movement stroke limiting surface matched with the front end surface of the separation plate (304).
7. The ophthalmic forceps based on a rear drive structure of claim 5, wherein: the limiting end heads (206) are elastic flap wings which are arranged along the circumferential direction of the main shaft (205) at intervals, and the elastic flap wings can contract and expand along the radial direction of the main shaft (205) by virtue of the elastic deformation capacity of the elastic flap wings.
8. The ophthalmic forceps based on a rear drive structure of claim 1, wherein: the tail end of the forceps handle (30) is provided with a threaded through hole arranged along the axial direction of the forceps handle, the inner end of the threaded through hole penetrates through the installation channel of the forceps handle (30), and a forceps tail (50) is fixed to the threaded through hole in a threaded manner; the outer surface of the rear end of the forceps tail (50) is provided with an annular mounting groove, and an O-shaped ring (501) is clamped in the mounting groove.
9. The ophthalmic forceps based on a rear drive structure as claimed in claim 8, wherein: the forceps handle (30) and the forceps tail (50) are made of 3D printing materials; the outer surface of the forceps handle (30) is provided with a frosted treatment layer.
10. The ophthalmic forceps based on a rear driving structure as claimed in any one of claims 1 to 9, wherein: the driving heads (302) are 3-9 petals which are uniformly distributed at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211661048.8A CN115844629A (en) | 2022-12-23 | 2022-12-23 | Ophthalmic forceps based on rear driving structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211661048.8A CN115844629A (en) | 2022-12-23 | 2022-12-23 | Ophthalmic forceps based on rear driving structure |
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| Publication Number | Publication Date |
|---|---|
| CN115844629A true CN115844629A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211661048.8A Pending CN115844629A (en) | 2022-12-23 | 2022-12-23 | Ophthalmic forceps based on rear driving structure |
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| CN (1) | CN115844629A (en) |
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| CN114305857A (en) * | 2021-12-06 | 2022-04-12 | 苏州碧利医疗科技有限公司 | Surgical forceps |
| US20220160389A1 (en) * | 2020-11-25 | 2022-05-26 | Indian Wells Medical, Inc. | Endoluminal punch system |
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| CN208481573U (en) * | 2017-08-23 | 2019-02-12 | 微瞳（武汉）医疗科技有限公司 | Intra-ocular scissors tweezer and operated eye set group |
| CN107456312A (en) * | 2017-08-31 | 2017-12-12 | 成都测迪森生物科技有限公司 | A kind of eye speculum clamped control |
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