CN209048214U - A kind of eye speculum hook structure - Google Patents

Abstract

The utility model discloses a kind of eye speculum hook structures, including hook portion, hook portion is fixedly connected with the connecting rod by drainage tube, connecting rod has hollow cavity structure, one end of connecting rod is fixedly connected with clamp arm, clamp arm has hollow cavity structure, and the hollow cavity of clamp arm is connected to the hollow cavity of connecting rod, and clamp arm conveys liquid to hook portion by connecting rod.By the structure for changing traditional eye speculum, the structure of liquid can be added dropwise in setting on eye speculum, and then it is excessively single to overcome traditional eye speculum function, the problem of cannot realizing moistening eye simultaneously, simultaneously, by the formula and preparation method that change existing thermoplastic polyurethane rubber, it overcomes larger to skin irritatin present in conventional thermoplastic's polyurethane rubber, the lower problem of bending strength, the tensile strength of its thermoplastic polyurethane rubber obtained reaches 29MPa, bending strength reaches 14.3MPa, ageing resistance is not higher than 9%, with good comprehensive mechanical property.

Description

A kind of eye speculum hook structure

Technical field

The utility model relates to operated eye instrument field, in particular to a kind of eye speculum hook structure.

Background technique

Eye speculum is hospital ophthalmology Special medical equipment, it is for expanding eyelid (eyes above and below two when eyelid Block tissue), for majority for making ophthalmologic operation, effect is the surgical field of view for expanding doctor.General eye speculum is screw turn-knob Eye speculum, operating method are: catching on eyelid with the hook portion of eye speculum, then precession screw rod, eyelid bar (i.e. the application is opened at both ends Clamp arm) outside diffusion, eyelid expanded.It follows that both hands is needed to operate when traditional eye speculum, i.e., a hand needs Eye speculum is held, to stablize its position, another hand needs rotary screw, and to expand eyelid, operation is to main operation in this way For hand, it appears it is rather troublesome, especially in doing ophthalmologic operation, general operating doctor when not needing secondary manipulator and helping, In order to expand surgical field of view, temporary adandonment of having to is ongoing to be operated to operate eye speculum, and this operation midway is suspended The case where be easy to cause operation contingency, be unfavorable for that operating doctor is smooth to perform the operation, and when secondary manipulator operates out eyelid When device, since the position of eye is narrow, space is limited, and double operated to eye undoubtedly increases operating difficulty, is also easy Accident surgery is caused, there are inconvenient problems with use therefore, it is necessary to traditional eye speculum of both hands operation.

Meanwhile in doing opthalmic surgery, for eyes under the irradiation of high poly- lamp, eye is easily dry and causes patient's eye Portion is uncomfortable, and then causes postoperative complication, even if eyes can lose most of consciousness in the case where anaesthetic, but eye Drying can stimulate patient is subconscious to blink, and be unfavorable for the progress of operation, and after finding eye dryness, eye drip is carried out to it When medicine moistens, since eye speculum does not set the structure of installation drop medicine device, the help for seeking secondary manipulator of having to causes Eye speculum function is excessively single.

In addition, the hook portion of eye speculum is often with stainless steel and TPU(thermoplastic polyurethane rubber) material is made, and due to stainless Steel rigidity is too big, easily causes to damage to eyeball and eyelid when in use, therefore, current trend using softer TPU material come As hook portion, still, since thermoplastic polyurethane rubber poor air permeability, bending strength are low, when being contacted with eyelid, clamp arm The variation of opening force degree is excessive, then be easy to cause hook portion deformation too big and be detached from eyelid, in prolonged surgical procedure, have quite The eyelid position of the patient of a part can redness sweat, and then eye is caused to stimulate, be obviously unfavorable for operation it is smooth into Row.

Utility model content

The goal of the invention of the utility model is: in view of the above problems, a kind of eye speculum hook structure is provided, By changing the structure of traditional eye speculum, the structure of liquid can be added dropwise in setting on eye speculum, thus overcome traditional eye speculum The problem of function is excessively single, cannot realize moistening eye simultaneously, meanwhile, the utility model also provides a kind of hook portion thermoplasticity Polyurethane rubber, by changing the formula and preparation method of existing thermoplastic polyurethane rubber, to overcome the poly- ammonia of conventional thermoplastic Problem larger to skin irritatin present in ester rubber, bending strength is lower.

The technical solution adopted in the utility model is as follows: a kind of eye speculum hook structure, including hook portion, feature exist In hook portion is fixedly connected with the connecting rod by drainage tube, and connecting rod has hollow cavity structure, and one end of connecting rod and clamp arm are solid Fixed connection, clamp arm have hollow cavity structure, and the hollow cavity of clamp arm is connected to the hollow cavity of connecting rod, and clamp arm passes through connection Bar conveys liquid to hook portion.

Further, multiple air holes are evenly distributed in hook portion.

Further, the surface of hook portion is equipped with criss-cross drainage trough, and air hole is arranged on drainage trough.

Further, the surface of hook portion covers one layer of spongy layer.

Further, propulsive liquid portion and liquid injection port are provided in clamp arm, propulsive liquid portion includes the pushing block and cunning being arranged in outside clamp arm The dynamic push-pads being connected to inside clamp arm, pushing block are fixedly connected with push-pads, and propulsive liquid portion can be free to slide in clamp arm, are pushed The shape of piece and the hollow cavity cross-sectional shape of clamp arm match, and clamp arm conveys liquid into connecting rod by propulsive liquid portion.

Further, hook portion is made of thermoplastic polyurethane rubber, and the thermoplastic polyurethane rubber passes through following parts by weight Component be made: 80 parts of TPU resin, 18-26 parts of titanium dioxide, 7-9 parts of wax powder, 3-5 parts of silica, 2-5 parts of glass fibre, firmly 1-3 parts of resin acid zinc, 1-3 parts of silane coupling agent, 1-3 parts of antioxidant, 0.5-1 parts of levelling agent, 0.5-1 parts of dispersing agent.Titanium dioxide Granularity be 300-400 mesh, the granularity of wax powder and silica is 100-200 mesh, and the average filament diameter of glass fibre is 100-150 μm, draw ratio 40-50:1, preferably 43:1；Antioxidant is preferably antioxidant 168, and levelling agent preferably has Machine Si modification polysiloxanes, dispersing agent are preferably BYK-ATU dispersing agent.

Further, the titanium dioxide and glass fibre want modification when in use, the modification of titanium dioxide it is specific Operation include: with silane coupling agent at 100 DEG C, be modified processing in deionized water, react 6-8h；Glass fibre Modification concrete operations include: with silane coupling agent at 80 DEG C, be modified processing in deionized water, react 10h.

Further, thermoplastic polyurethane rubber preparation method the following steps are included:

Step 1, will TPU resin, wax powder, silica and dispersing agent be added reactor in, then with blender with The revolving speed of 800rad/min, which is stirred, to be uniformly dispersed, and obtains base-material；

Glass fibre and titanium dioxide are added in coupling reaction tank by step 2, under the mixing speed of 800rad/min in It is uniformly mixed in 80 DEG C, while agitating, silane coupling agent is sprayed directly in mixture, made after keeping the temperature 20min Obtain mixture；

Base-material, mixture, antioxidant, levelling agent and zinc stearate are uniformly mixed by step 3 in blender, then And it send be kneaded 8h into mixer together；

Step 4 after being kneaded, allows its coagulation forming, obtains sizing material, post-processed to sizing material to obtain the final product.

In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: the utility model provides A kind of eye speculum hook structure, by changing the structure of traditional eye speculum, liquid can be added dropwise in setting on eye speculum Structure, and then it is excessively single to overcome traditional eye speculum function, the problem of cannot realizing moistening eye simultaneously, meanwhile, by changing The formula and preparation method for having thermoplastic polyurethane rubber are cashed, is overcome present in conventional thermoplastic's polyurethane rubber to skin Skin stimulates problem larger, that bending strength is lower, and the tensile strength of thermoplastic polyurethane rubber obtained reaches 29MPa, resists Curved intensity reaches 14.3MPa, and ageing resistance is not higher than 9%, has good comprehensive mechanical property.

Detailed description of the invention

Fig. 1 is a kind of eye speculum three dimensional structure diagram of the utility model；

Fig. 2 is the eye speculum schematic view of the front view of the utility model；

Fig. 3 is the partial enlarged view of part A in Fig. 2；

Fig. 4 is the hook portion deployed configuration partial schematic diagram of the utility model；

Fig. 5 is the latch gear schematic cross-sectional view of the utility model.

Appended drawing reference: 1 is support frame, and 2 be clamping device, and 201 be hand-held arm, and 3 be clamp arm, and 301 be propulsive liquid portion, and 4 be company Extension bar, 5 be hook portion, and 501 be air hole, and 502 be drainage trough, and 6 be latch gear, and 601 be outer sleeve, and 602 be inner sleeve, 603 It is groove for ball, 604,7 be distance rod, and 701 be slide bumping, and 8 be the first transmission rod, and 9 be the second transmission rod, and 10 be slotting Pin, 11 be drainage tube.

Specific embodiment

With reference to the accompanying drawing, the utility model is described in detail.

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As shown in Figures 1 to 5, a kind of eye speculum, including support frame 1, clamping device 2 and clamp arm 3, one end of clamp arm 3 with Support frame 1 is rotatablely connected, and the other end of clamp arm 3 is fixedly connected with connecting rod 4, and clamp arm 3 is symmetricly set on the both ends of support frame 1. The cantilever end of connecting rod 4 is fixedly connected with hook portion 5, and the middle part of support frame 1 is fixedly connected with latch gear 6, and latch gear 6 is located at branch Far from the side of clamp arm 3 on support 1, clamping device 2 is rotatably connected on latch gear 6, and the middle part of latch gear 6 is by distance rod 7 run through, and distance rod 7 runs through the middle part of support frame 1 simultaneously, and distance rod 7 is distinguished towards one end of clamp arm 3 by the first transmission rod 8 It is rotatablely connected with clamp arm 3, the other end of distance rod 7 is rotatablely connected by the second transmission rod 9 with clamping device 2, and distance rod 7 can It is slided in latch gear 6, latch gear 6 is used for the sliding of limit thrust bar 7.Clamping device 2 includes being symmetrically disposed on thrust The hand-held arm 201 of 7 two sides of bar holds arm 201 and is rotatablely connected with distance rod 7, when hand-held arm 201 is leaned on to the center line of distance rod 7 When holding together, holds arm 201 and drive distance rod 7 to the direction movement far from support frame 1 by the second transmission rod 9, and then make distance rod 7 The first transmission rod 8 is pulled, and drives clamp arm 3 also to draw close to the center line of distance rod 7 by the first stayed mast 8, is achieved in folder The closing action of arm 3；Correspondingly, it when hand-held center line of the arm 201 far from distance rod 7 is mobile, holds arm 201 and is passed by second It is mobile to the direction close to support frame 1 that power bar 9 drives distance rod 7, and then distance rod 7 is made to pull the first transmission rod 8, and passes through the One stayed mast 8 drives clamp arm 3 also separate to the center line of distance rod 7, is achieved in the opening action of clamp arm 3.Latch gear 6 can To fix distance rod 7 by bolt.Relative to it is traditional screw rod come by way of realizing the opening of eye speculum and closing up, The eye speculum of the utility model can realize one-handed performance, can adjust at any time the opening-closing size of eyelid device, at the same can be realized with When fix, facilitate the operation of operated eye, sense of discomfort caused by eyes of patients significantly reduced, patient is acceptable to spend, Conducive to going on smoothly for surgical procedure.

Further, latch gear 6 includes outer sleeve 601 and inner sleeve 602, as shown in figure 5, one end of outer sleeve 601 It is fixedly connected on support frame 1, the other end and clamping device 2 are rotatablely connected；Inner sleeve 602 passes through ball 603 and outer sleeve 601 Rotation connection, distance rod 7 are placed in the inside of inner sleeve 602, and the inner wall of inner sleeve 602 is equipped with the groove 604 of helically line distribution, Distance rod 7 is equipped with the slide bumping 701 cooperated with 604 shape face of groove, and slide bumping 701 can be free to slide in groove 604, When distance rod 7 is moved along its axis direction, inner sleeve 602 is rotated relative to distance rod 7 (turns original similar to rotary mop Reason), as long as at this point, on outer sleeve 601 be arranged bolt 10, the rotation of inner sleeve 602 is limited by bolt 10, can be realized The movement of limit thrust bar 7, and then achieve the purpose that fixed distance rod 7, fix the open angle of eye speculum, without logical That receives and distributes exerts oneself to be maintained open angle, saves the physical demands of user, eye speculum using more stable.

Further, in order to make distance rod 7 not shift in moving process, and keep the structure of latch gear 6 more steady Fixed secured, the wall thickness of outer sleeve 601 is greater than the wall thickness of inner sleeve 602.Correspondingly, it in order to move distance rod 7 preferably, reduces Resistance suffered by it in order to eye speculum smooth opening or closes up, and the spacing between outer sleeve 601 and inner sleeve 602 is not less than 1mm。

Further, in order to reduce the resistance that inner sleeve 602 rotates, the outer surface of inner sleeve 602 coats a strata tetrafluoro Pvdf layer (is not drawn into) in figure, polytetrafluoroethylene ethylene layer with a thickness of 150-300 μm, preferably 230 μm.

Further, since the general operated eye time is longer, to prevent because of eye dryness caused by patient it is uncomfortable, hook portion 5 It is made first of thermoplastic polyurethane rubber, as shown in Figure 3 and Figure 4, uniformly distributed multiple air holes 501 in hook portion 5 open eyelid to improve Comfort level of the device when widening the view eyelid.The surface of hook portion 5 is equipped with criss-cross drainage trough 502, and hook portion 5 is by drainage tube 11 and even Extension bar 4 is fixedly connected, and eyedrops is full of in drainage tube 11, conveys eyedrops to hook portion by drainage tube 11, hook portion 5 passes through drainage Slot 502 substantially distributes everywhither, and then soaks to eyelid, and extra eyedrops then flows into intraocularly with eyelid, and then plays The effect of moistening eye, solves the problems, such as eye dryness.

Further, in order to preferably soak to eyelid, the place for contacting hook portion 5 with eyelid can be wetted, Air hole 501 is arranged on drainage trough 502, as shown in Figure 4.The surface of hook portion 5 covers one layer of spongy layer (being not drawn into figure), leads to The eyedrops that the space cavernous structure of sponge is crossed flow out drainage tube 11 is more evenly distributed, and then contacts hook portion 5 with eyelid Place can be wetted, the problem of improving wetting effect, better solved eye dryness.

Further, in order to which the drainage tube 11 for preferably making the utility model exports eyedrops, connecting rod 4 and clamp arm 3 are equal With hollow inner cavity, and the end that connect with clamp arm 3 of connecting rod 4 is protruded into clamp arm 3 and is fixedly connected, and clamp arm 3 is hollow Inner cavity and the hollow cavity of connecting rod 4 are mutually communicated, and propulsive liquid portion 301 and liquid injection port (being not drawn into figure) are provided in clamp arm 3, is pushed away Liquid portion 301 includes the push-pads that the pushing block outside clamp arm 3 is arranged in and is slidably connected inside clamp arm 3, and pushing block and push-pads are solid Fixed connection, propulsive liquid portion 301 can be free to slide in clamp arm 3.The shape of push-pads and the hollow cavity cross-sectional shape of clamp arm 3 Matching, eyedrops is entered by liquid injection port in the hollow cavity of clamp arm 3, due in actual use, connecting rod 4 and clamp arm 3 Diameter is smaller, and the diameter of clamp arm 3 is generally 2-4mm, and the diameter of connecting rod 4 is generally 1-2mm, therefore, in uninflated feelings Under condition, the eyedrops being placed in clamp arm 3 and connecting rod 4 will not be flowed outwardly voluntarily by drainage tube 11, therefore, propulsive liquid portion 301 Effect be exactly to realize pressurization using the push-pads in propulsive liquid portion 301, so that drainage tube 11 is flowed out eyedrops, so reach with Take with effect, convenient for user in the course of surgery be more convenient operation, improve the adaptability of eye speculum, enrich out eyelid The function of device.

In view of traditional thermoplastic polyurethane rubber since biocompatibility is poor, easily allergy is caused to infect in eyelid, Bending strength is lower, is not easy to open eyelid position, effectively to overcome hard thermoplastic polyurethane rubber to cause eye illness and bending strength Lower easily-deformable problem, the thermoplastic polyurethane rubber are made up of the component of following parts by weight: 80 parts of TPU resin, titanium 18-26 parts of white powder, 7-9 parts of wax powder, 3-5 parts of silica, 2-5 parts of glass fibre, 1-3 parts of zinc stearate, silane coupling agent 1-3 Part, 1-3 parts of antioxidant, 0.5-1 parts of levelling agent, 0.5-1 parts of dispersing agent.The granularity of titanium dioxide is 300-400 mesh, wax powder and two The granularity of silica is 100-200 mesh, and the average filament diameter of glass fibre is 100-150 μm, draw ratio 40-50:1, excellent It is selected as 43:1；Antioxidant is preferably antioxidant 168, and levelling agent is preferably organic-silicon-modified polysiloxanes, and dispersing agent is preferred For BYK-ATU dispersing agent.

Among the above, titanium dioxide and glass fibre need modification when in use, to increase its compatibility, make to eventually form Thermoplastic polyurethane rubber comprehensive mechanical property it is preferable, improve its durability.Specifically, the modification of titanium dioxide Concrete operations include: with silane coupling agent at 100 DEG C, be modified processing in deionized water, react 6-8h；Glass The concrete operations of the modification of fiber include: with silane coupling agent at 80 DEG C, be modified processing in deionized water, instead Answer 10h.

In order to better implement the thermoplastic polyurethane rubber of the utility model, the preparation method of thermoplastic polyurethane rubber The following steps are included:

Step 1, will TPU resin, wax powder, silica and dispersing agent be added reactor in, then with blender with The revolving speed of 800rad/min, which is stirred, to be uniformly dispersed, and obtains base-material；

Glass fibre and titanium dioxide are added in coupling reaction tank by step 2, under the mixing speed of 800rad/min in It is uniformly mixed in 80 DEG C, while agitating, silane coupling agent is sprayed directly in mixture, made after keeping the temperature 20min Obtain mixture；

Base-material, mixture, antioxidant, levelling agent and zinc stearate are uniformly mixed by step 3 in blender, then And it send be kneaded 8h into mixer together；

Step 4 after being kneaded, allows its coagulation forming, obtains sizing material, post-process to sizing material.

Further, in step 4, post-processing specifically includes: carrying out slicing treatment, the size and thickness of slice to sizing material Depending on the design size of hook portion, the then high-temperature process 30min at 80 DEG C obtains hook portion after cooling and shaping.

In order to which the thermoplastic polyurethane rubber of the utility model is better described, it is exemplified below specific embodiment, such as 1 institute of table Show:

The specific formula (in parts by weight) of 1 embodiment 1-8 of table

1, Mechanics Performance Testing: using universal testing machine test tensile strength and bending strength, (testing standard is distinguished It is tested using ISO 527 and ISO 178)；

2, ageing resistance is tested: it is aging for a week in artificial accelerated aging case, then survey the decline percentage of its performance.

The results are shown in Table 2:

The Specifeca tion speeification of 2 embodiment 1-7 of table

As shown in Table 2, the tensile strength of the thermoplastic polyurethane rubber of the utility model reaches 29MPa, and bending strength reaches To 14.3MPa, ageing resistance is not higher than 9%, has good comprehensive mechanical property, bending strength (one especially with higher As thermoplastic polyurethane rubber bending strength less than 7MPa), can satisfy requirement of the hook portion to material property, overcome tradition Thermoplastic polyurethane rubber bending strength is lower, is not easy the problem of opening eyelid position.

In the above-described embodiments, when being applied to hook portion obtained to do operated eye, also there is not an example because of hook portion material at present The case where material causes allergic reaction, cause may be that the thermoplastic polyurethane rubber of the utility model has used content less Chemical reagent and have more supervirulent chemical raw material, increased significantly the content of inorganic hypotoxicity filler, especially titanium dioxide Content, and then guarantee thermoplastic polyurethane rubber have good comprehensive performance under conditions of, chemical examination has been greatly reduced Agent and industrial chemicals are stimulated caused by skin, hence it is evident that are reduced allergic reaction caused by thermoplastic polyurethane rubber, thus said The thermoplastic polyurethane rubber of bright the utility model can be contacted directly with human body weak part, hardly cause allergy anti- It answers, solves the problems, such as that conventional thermoplastic's polyurethane rubber can cause cutaneous anaphylaxis, big to skin irritatin.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (3)

1. a kind of eye speculum hook structure, including hook portion, which is characterized in that hook portion connects by the way that drainage tube and connecting rod are fixed It connects, connecting rod has hollow cavity structure, and one end of connecting rod is fixedly connected with clamp arm, and clamp arm has hollow cavity structure, folder The hollow cavity of arm is connected to the hollow cavity of connecting rod, and clamp arm conveys liquid to hook portion by connecting rod, is uniformly divided in hook portion Multiple air holes are furnished with, the surface of hook portion is equipped with criss-cross drainage trough, and air hole is arranged on drainage trough.

2. eye speculum hook structure as described in claim 1, which is characterized in that the surface of hook portion covers one layer of spongy layer.

3. eye speculum hook structure as described in claim 1, which is characterized in that be provided with propulsive liquid portion and fluid injection in clamp arm Mouthful, propulsive liquid portion includes the pushing block being arranged in outside clamp arm and the push-pads being slidably connected inside clamp arm, and pushing block and push-pads are solid Fixed connection, propulsive liquid portion can be free to slide in clamp arm, the hollow cavity cross-sectional shape phase of the shape and clamp arm of push-pads Match, clamp arm conveys liquid into connecting rod by propulsive liquid portion.