CN210250249U - Corneal contact lens receiver applied to vitreoretinal surgery - Google Patents
Corneal contact lens receiver applied to vitreoretinal surgery Download PDFInfo
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- CN210250249U CN210250249U CN201920287178.7U CN201920287178U CN210250249U CN 210250249 U CN210250249 U CN 210250249U CN 201920287178 U CN201920287178 U CN 201920287178U CN 210250249 U CN210250249 U CN 210250249U
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Abstract
The utility model discloses a be applied to corneal contact lens receiver of vitreoretinal operation, include: the mechanical gripper comprises a pressing device, a mechanical gripper disc, a mechanical gripper and a shell; when the pressing rod descends, the tail part presses the upper arm of the mechanical claw, so that the claw arm is expanded, the pressing rod ascends after the release button is pressed, and the claw arm is contracted to grab the cornea. The utility model discloses the ware is put to receipts can improve operation efficiency, reduces because of metal tweezers contact damage lens, is difficult for droing, collects the convenience, reduces to get the risk of putting the in-process lens harm.
Description
Technical Field
The utility model belongs to the field of medical equipment, concretely relates to a corneal contact lens retraction device for vitreoretinal surgery.
Background
In modern vitreoretinal surgery, a non-contact wide-angle system is widely applied, and can provide clear and wide-angle operation visual field for an operator. However, corneal injury has been a difficult problem to circumvent during surgery due to its "non-contact nature". The combination of the corneal contact lens can prevent corneal dryness during operation and maintain the definition of the fundus image of a patient, thereby being popular with the patients. However, because the surface of the corneal contact lens is smooth, the contact lens is difficult to clamp in the operation, and an operator can only place the contact lens by using instruments or clamps by hands without corresponding overhead equipment. So that the following defects exist in the clinical use of the medicine: firstly, the instrument or the hand clamp easily damages the mirror surface of the contact lens, which causes the blurred vision in the operation. Secondly, the stability is poor after clamping and is easy to fall off.
At present, no special retracting device for the corneal contact lens in the operation exists in the market. Three similar devices exist, namely corneal contact lens wearing devices in daily life, which are divided into tweezers, soft clips and suction rods. The tweezers are not suitable for operation because the contact surface is small, the tweezers are not easy to clamp and fall off, and the contact surface is easy to damage. The soft clamp and the suction rod are mostly made of silica gel, the contact surface is large when the soft clamp and the suction rod are used, although the contact surface is not easy to damage, the soft clamp and the suction rod are only contacted with the convex surface, the clamping needs to be supported by friction force provided by an operator, and therefore the soft clamp or the suction rod is easy to fall off. On the vitreoretinal operating table, an operator needs to switch the ordinary visual field and the microscope visual field, and the falling of the corneal contact lens brings great trouble to the operator. In addition, in the repeated disinfection of the contact lens, the contact lens is damaged by repeated friction with the outside, and an instrument capable of erecting the contact lens is necessary.
Disclosure of Invention
The utility model provides a cornea contact lens retraction device which can safely place the cornea contact lens and prevent the cornea contact lens from falling.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a corneal contact lens receptacle for use in vitreoretinal surgery, comprising: the mechanical gripper comprises a pressing device, a mechanical gripper disc, a mechanical gripper and a shell; the shell is a hollow body with a sealed top and an open bottom, and the pressing device comprises a button, a spring, a pressing right prism, a frame plate and a pressing rod; the button penetrates through the inside and the outside of the shell, the frame plate is fixed inside the shell, the top of the pressing rod is a wedge with an upward tip, the pressing rod penetrates through the frame plate, the middle part of the wedge is positioned on the plane of the frame plate, one end of the spring and a right-angle surface of the pressing right triangular prism are fixed at the tail of the button and are respectively positioned above and below the frame plate, the other end of the spring is fixed on the surface of a baffle arranged on the frame plate, the tip angle of the pressing right triangular prism is abutted against an inclined plane at the top of the wedge, and the pressing rod descends along; the gripper disc is the annular and fixes in the casing bottom, the gripper includes the upper arm on upper portion and the claw arm of well lower part, be provided with the fixed orifices between upper arm and the claw arm, the gripper passes the gripper disc through the fixed orifices to the upper arm of gripper is located gripper disc ring internal top, and the claw arm is located the outer below of dish, presses the bottom surface frame of stick on the upper arm, presses the gripper upper arm in the bottom surface when pressing the stick decline for the claw arm abduction, relaxs the button and presses the stick to rise, thereby the claw arm adduction snatchs the cornea.
Furthermore, the number of the mechanical claws is 3-10, and the mechanical claws are uniformly distributed on the mechanical claw disc.
Furthermore, a torsion spring is arranged between the fixing hole of the mechanical claw and the mechanical claw disc, one end force arm of the torsion spring is in the same direction as the upper arm of the mechanical claw, and the other end force arm of the torsion spring is fixed on the mechanical claw disc, so that the mechanical claw and the plane where the mechanical claw disc is located form a certain angle and the inward contraction of the claw arm is controlled.
Furthermore, the lower part of the claw arm of the mechanical claw is wrapped with an anti-slip rubber layer.
Further, the shell is cylindrical or cuboid.
Furthermore, the lower part of the frame plate is provided with a pressing rod fixing sleeve.
Further, the corneal contact lens receiver further comprises a mechanical claw protective sleeve, and the mechanical claw protective sleeve can be sleeved on the outer side of the mechanical claw and the bottom of the shell.
Furthermore, the bottom of the pressing rod is gradually enlarged, and the bottom surface of the pressing rod is in a disc shape.
Furthermore, the angle of the tip end of the wedge body at the top of the pressing rod is 5-20 degrees, and the pressing depth of the wedge body is 2-5 mm.
Furthermore, the length of the upper arm of the mechanical claw is 2-5 mm, and the upper arm and the plane where the mechanical claw disk is located are 15-30 degrees. The length of the lower arm of the mechanical claw is 10-30 mm.
The utility model discloses beneficial effect as follows: (1) the utility model discloses the ware is put to receipts can improve operation efficiency, reduces because of metal tweezers contact damage lens, is difficult for droing, collects the convenience, reduces to get the risk of putting the in-process lens harm. (2) The utility model relates to a portably, what adopt is common metal or plastic materials on the market, do benefit to later stage batch production. (3) The utility model discloses retraction device, it is little to lens area of contact, do not harm the lens center field of vision. Avoids the damage of the tweezers to the lens in the clamping process. (4) The utility model discloses the ware of putting in and out is small and exquisite, and is convenient, and the clamp is got and is easily disinfected together behind the cornea contact lens, but reuse. (5) The utility model discloses scribble the viscoelastic agent behind the lens when can directly centre gripping lens, place the phenomenon that the lens easily produced the bubble and influence the field of vision in the art again after smearing the viscoelastic agent at the cornea when avoiding traditional operation.
Drawings
Fig. 1 is a schematic structural view (housing section) of a contact lens receiver of an embodiment.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the above-described drawings, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
A contact lens receptacle for use in vitreoretinal surgery as shown in fig. 1 includes: the pressing device, gripper disc 1, gripper and housing 2.
Wherein the shell is in a cylindrical shape with a sealed top and an open bottom.
The pressing device comprises a button 3, a spring 4, a pressing right triangular prism 5, a frame plate 6 and a pressing rod 7, wherein the button penetrates through the inside and the outside of the shell and is supported, a button supporting frame can be arranged on the shell, the frame plate is fixed inside the shell, the top of the pressing rod is a wedge-shaped body 8 with an upward tip part, the angle of the tip end of the wedge-shaped body is α, and the pressing depth of the wedge-shaped body is a1。
The pressing rod penetrates through the frame plate, the middle of the wedge body is located on the plane of the frame plate, one end of the spring and a right-angle surface pressing the right triangle body are fixed at the tail of the button and located on the upper portion and the lower portion of the frame plate respectively, the other end of the spring is fixed on the surface of a baffle plate 9 arranged on the frame plate, and a sharp corner pressing the right triangle body abuts against an inclined plane at the top of the wedge body. The other right-angle surface of the pressing right triangular prism is parallel to the bottom surface of the frame plate. And when the button is pressed, the included angle of the pressing right triangular prism slides on the inclined plane of the wedge-shaped body, and the pressing rod descends along with the increase of the pressing force. The pressing rod moves downwards by a height h. The button is stopped being pressed and rebounded under the action of the spring.
The shelf plate is provided with a gap at one side of the button, so that the button can be conveniently pressed towards the inside of the shell.
The gripper disc is fixed at the bottom of the shell in an annular mode and is fixed through the connecting rod.
The number of the mechanical claws is three, each mechanical claw comprises an upper arm 10 at the upper part and a claw arm 11 at the middle lower part, a fixing hole 12 is arranged between the upper arm and the claw arm, and the mechanical claws penetrate through the mechanical claw disk through the fixing holes. Be provided with torsion spring 13 between fixed orifices and the go-between, torsion spring's one end arm of force and gripper upper arm equidirectional, the other end arm of force is fixed on the gripper dish for the gripper is certain angle with the plane of gripper dish place: is positioned at the upper part in the mechanical claw disk ring, and the claw arm is positioned at the lower part outside the disk.
The bottom surface of the pressing rod is erected on the upper arms of the three mechanical claws, when the pressing rod descends, the bottom surface presses the upper arms of the mechanical claws, so that the claw arms are expanded, the pressing rod ascends by releasing the button, and the claw arms are contracted to grab the cornea. The whole mechanical claw is shaped like a ']', and the upper end and the lower end of the mechanical claw extend outwards. When the claw arm is received, the lower end of the claw arm is vertical to the bottom surface of the pressing rod.
The lower parts of the claw arms of the mechanical claws are wrapped with anti-slip rubber layers, the included angle between the upper arms of the mechanical claws and the plane where the mechanical claw disc is located is β, the length of the claw arms of the mechanical claws is e, the rotating angle of the single upper arm of the mechanical claws at the intersection point of the single upper arm of the mechanical claws and the mechanical claw disc is gamma, and the outward extending angle of the claw arms of the mechanical claws is gamma.
According to the trigonometric function, the following is obtained:
h＝a1tanα (1)
γ＝β-arcsin[(dsinβ-a1tanα)/d](2)
wherein h is the downward moving height of the pressing rod, a1The wedge pressing depth is α, the wedge tip angle is α, the gripper arm abduction angle is γ, the angle between the gripper upper arm and the plane of the gripper disc is β, and the length of the gripper upper arm is d.
And protective sleeves can be arranged at the mechanical claw and the bottom of the shell for protecting the mechanical claw.
The bottom of the pressing rod can be gradually enlarged, and the bottom surface of the pressing rod is in a disc shape.
The lower part of the frame plate can be provided with a pressing rod fixing sleeve for ensuring that the pressing rod does not incline when descending.
When the cornea contact lens receiver is used, the protective sleeve of the cornea contact lens receiver is taken firstly, the upper part of the shell is held by a single hand or pinched by a thumb and a forefinger, the button is pressed by the thumb, the wedge-shaped body at the top of the pressing rod is pressed by the spring, so that the pressing rod descends, the upper arm of the mechanical claw ascends and the claw arm ascends and abducts, the cornea contact lens receiver is moved to the position above the cornea to be clamped, the cornea is placed in the center of the mechanical claw disc, the pressing rod ascends by the release button, and the claw arm is retracted to grab the cornea.
Example 1
The utility model provides a be applied to corneal contact lens distributor of vitreoretinal operation, distributor wedge tip angle α be 10, gripper upper arm length d be 3mm, the contained angle β of gripper upper arm and gripper disc place plane be 20, the wedge is pressed degree of depth a1The pressing rod downward moving height is about 0.53mm and the mechanical claw abduction angle is about 10.4 degrees by calculating formulas 1 and 2, which are 3 mm.
Example 2
The utility model provides a be applied to corneal contact lens distributor of vitreoretinal operation, distributor wedge tip angle α be 8, the length d of gripper upper arm be 3mm, the contained angle β of gripper upper arm and gripper disc place plane be 20, the wedge is pressed degree of depth a1The pressing rod downward moving height is about 0.56mm and the mechanical claw abduction angle is about 11.1 degrees by calculating formulas 1 and 2, which are 4 mm.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A corneal contact lens receptor for use in vitreoretinal surgery, comprising: the mechanical gripper comprises a pressing device, a mechanical gripper disc, a mechanical gripper and a shell; the shell is a hollow body with a sealed top and an open bottom, and the pressing device comprises a button, a spring, a pressing right prism, a frame plate and a pressing rod; the button penetrates through the inside and the outside of the shell, the frame plate is fixed inside the shell, the top of the pressing rod is a wedge with an upward tip, the pressing rod penetrates through the frame plate, the middle part of the wedge is positioned on the plane of the frame plate, one end of the spring and a right-angle surface of the pressing right triangular prism are fixed at the tail of the button and are respectively positioned above and below the frame plate, the other end of the spring is fixed on the surface of a baffle arranged on the frame plate, the tip angle of the pressing right triangular prism is abutted against an inclined plane at the top of the wedge, and the pressing rod descends along; the gripper disc is the annular and fixes in the casing bottom, the gripper includes the upper arm on upper portion and the claw arm of well lower part, be provided with the fixed orifices between upper arm and the claw arm, the gripper passes the gripper disc through the fixed orifices to the upper arm of gripper is located gripper disc ring internal top, and the claw arm is located the outer below of dish, presses the bottom surface frame of stick on the upper arm, presses the gripper upper arm in the bottom surface when pressing the stick decline for the claw arm abduction, relaxs the button and presses the stick to rise, thereby the claw arm adduction snatchs the cornea.
2. The corneal contact lens receptacle of claim 1, wherein: the number of the mechanical claws is 3-10, and the mechanical claws are uniformly distributed on the mechanical claw disc.
3. The corneal contact lens receptacle of claim 1, wherein: and a torsion spring is arranged between the fixing hole of the mechanical claw and the connecting ring, one end force arm of the torsion spring and the upper arm of the mechanical claw are in the same direction, and the other end force arm of the torsion spring is fixed on the mechanical claw disc, so that the mechanical claw and the plane where the mechanical claw disc is located form a certain angle and the inward contraction of the claw arm is controlled.
4. The corneal contact lens receptacle of claim 1, wherein: and the lower part of the claw arm of the mechanical claw is wrapped with an anti-skid rubber layer.
5. The corneal contact lens receptacle of claim 1, wherein: the shell is cylindrical or cuboid.
6. The corneal contact lens receptacle of claim 1, wherein: the lower part of the frame plate is provided with a pressing rod fixing sleeve.
7. The corneal contact lens receptacle of claim 1, wherein: the corneal contact lens receiver further comprises a mechanical claw protective sleeve, and the protective sleeve can be sleeved on the outer sides of the mechanical claw and the bottom of the shell.
8. The corneal contact lens receptacle of claim 1, wherein: the bottom of the pressing rod is gradually enlarged, and the bottom surface of the pressing rod is disc-shaped.
9. The corneal contact lens receptacle of claim 1, wherein: the wedge-shaped body at the top of the pressing rod is 5-20 degrees in tip angle, and the pressing depth of the wedge-shaped body is 2-5 mm.
10. The corneal contact lens receptacle of claim 1, wherein: the length of the upper arm of the mechanical claw is 2-5 mm, the upper arm and the plane where the mechanical claw disc is located are 15-30 degrees, and the length of the lower arm of the mechanical claw is 10-30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287178.7U CN210250249U (en) | 2019-03-07 | 2019-03-07 | Corneal contact lens receiver applied to vitreoretinal surgery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920287178.7U CN210250249U (en) | 2019-03-07 | 2019-03-07 | Corneal contact lens receiver applied to vitreoretinal surgery |
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| CN210250249U true CN210250249U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771133A (en) * | 2019-03-07 | 2019-05-21 | 刘庆淮 | A kind of contact lens receiver applied to vitrectomy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771133A (en) * | 2019-03-07 | 2019-05-21 | 刘庆淮 | A kind of contact lens receiver applied to vitrectomy |
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