CN110095887A - Contact lens cleaning and sterilizing care instrument based on physical method - Google Patents

Abstract

The invention discloses a cleaning and disinfection care instrument for corneal contact lenses based on a physical method, which includes a housing, a water tank, an ultraviolet lamp, a micro drainage pump, a centrifugal cleaning component, and a control circuit; There is a transparent window, and the ultraviolet lamp is set outside the transparent window. The water in the water tank can be discharged by a micro drainage pump; the centrifugal cleaning parts include a centrifugal motor, a rotating main bracket, and two silicone mesh structure mirror boxes fixed under the rotating main bracket. The centrifugal motor drives the two mirror boxes to rotate by rotating the main bracket; the nursing device uses water as the cleaning medium to clean, disinfect and sterilize the contact lens with physical methods, and combines the deep cleaning and disinfection technology of the contact lens to fill Cleared the blank of domestic and foreign contact lens green and environmental protection disinfection care products.

Description

Contact lens cleaning and disinfection nursing device based on physical method

technical field

The invention belongs to the technical field of cleaning and disinfection of corneal contact lenses, and relates to a cleaning and disinfection nursing instrument for corneal contact lenses, in particular to a cleaning and disinfection nursing instrument for contact lenses based on physical methods.

Background technique

Myopia is the most common eye disease in my country, and the survey results show that the myopia rate of students in my country ranks second in the world. The myopia rate of primary school students is 28%, that of junior high school students is 60%, that of high school students is 85%, and that of college students is 90%. The rates of poor myopia for boys over the age of 14 and girls over the age of 13 are both over 80%. Contact lenses (contact lenses) are favored by more and more patients, especially young people, for their convenience, comfort, and aesthetics, and the number of use is increasing year by year; in recent years, more and more parents tend to choose new contact lenses (RGP, OK lens, etc.) to correct the myopia of young people and delay the development of myopia, so the cleaning, nursing and disinfection of contact lenses need to be paid attention to urgently.

At present, the cleaning, disinfection and care of contact lenses mostly use chemical methods: that is, repeated washing, soaking or protease removal of contact lens care solution to clean the lens, and repeated hand rubbing and repeated washing and soaking of care solution or protease removal are generally used to clean the lens. Cleaning the lens can easily cause wear, scratches, cracks, etc. of the contact lens. People choose to wear contact lenses, which means that they cannot do without various chemical cleaning solutions, disinfectants and care solutions. Its components are complex, and if one of the components in the liquid fails or is contaminated, it will bring about the risk of eye infection or even blindness; in addition, repeated use of chemical cleaning and disinfecting solutions for a long time can also cause various diseases on the ocular surface: such as giant papillae Conjunctivitis, decreased corneal sensation, dry eye, etc. And the dumping of various chemical cleaning solutions, disinfectants and care solutions used has also greatly increased the pollution to the environment.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a contact lens cleaning and disinfection nursing instrument based on physical methods. The nursing instrument uses water as the cleaning medium, and uses physical methods to clean, disinfect and sterilize the contact lens, and the contact lens The combination of advanced deep cleaning and disinfection and sterilization technology fills the blank of domestic and foreign contact lens green and environmental protection disinfection care products.

The technical scheme that the present invention adopts is as follows:

A contact lens cleaning and disinfection care instrument based on physical methods, including a housing, a water tank, an ultraviolet lamp, a micro drainage pump, centrifugal cleaning components, and a control circuit;

The shell includes a trough-shaped base, a middle frame and an upper cover. The water tank, ultraviolet lamp and micro drainage pump are all arranged in the trough-shaped base, the middle frame is fixed on the base, and the hollow part of the middle frame is facing the water tank. It can be opened above the middle frame, and after closing, a closed space is formed between the upper cover, the middle frame and the groove base;

The water tank is used to hold water, and its side wall is provided with a transparent window, and the ultraviolet lamp is arranged outside the transparent window. The drains on the grooved base are connected;

The centrifugal cleaning part includes a centrifugal motor, a rotating main support, and two mirror boxes of silica gel mesh structure fixed under the rotating main support. The centrifugal motor is arranged on the bottom surface of the upper cover, and the rotating main support is fixedly connected to the output shaft of the centrifugal motor. ;

The control circuit controls the work of the centrifugal motor, the ultraviolet lamp and the miniature drainage pump.

In the above technical solution, further, the silicone mesh mirror box is a hollow mirror box made of silicone material and a mesh structure, which is used for placing corneal contact lenses.

Further, the two silica gel mesh structure mirror boxes are respectively arranged at the two ends of the rotating main bracket.

Further, the transparent window is made of quartz glass.

Further, both sides of the water tank are provided with quartz glass transparent windows, and an ultraviolet lamp is arranged outside each transparent window.

Further, the said disinfection nursing instrument is provided with LED indicator lights for displaying the working status.

Further, the disinfection nursing instrument is provided with a control button, and after being pressed, the nursing instrument automatically performs the following work: After the centrifugal motor rotates forward and reverse alternately for a certain period of time, the ultraviolet lamp lights up, the micro drainage pump works, and after a period of After the time, the UV lamp is turned off and the centrifuge motor stops rotating.

Furthermore, the rotation speed of the centrifugal motor is 2 forward and reverse motions per second. After 3 minutes of rotation, the ultraviolet lamp is lit, and the micro drainage pump is started. After another 3 minutes, the ultraviolet lamp is turned off, and the centrifugal motor Stop spinning.

Further, the total power of the ultraviolet lamp is 12W.

Further, the control circuit is implemented based on a single-chip microcomputer.

The beneficial effects of the present invention are:

The nursing instrument of the present invention is a brand-new cleaning and disinfection nursing instrument for contact lenses. The instrument uses water as the cleaning medium to clean, disinfect and sterilize the contact lenses with physical methods, and combines the deep cleaning and disinfection technologies of the contact lenses. Combined, automatic control can be realized. During the whole process of cleaning and disinfection, there is no need to touch the lens with hands, which effectively prevents the secondary pollution of the lens, and the whole process is a purely physical process, which does not involve the use and pollution of chemicals. It fills the blank of domestic and foreign contact lens green and environmental protection disinfection care products.

The cleaning effect of the nursing instrument of the present invention is obviously better than that of the commercially available ultrasonic cleaning machine. After 3 minutes of cleaning, observe under the environment of the slit lamp light source with a high-power microscope, any lens can be seen at the positioning arc, base arc, inversion arc, etc. No obvious lipid, protein and other lacrimal secretion precipitation.

The nursing device of the present invention has an excellent disinfection effect, can effectively kill and control microorganisms, and is different from the corneal contact lens cleaners on the market, because the nursing device uses water as a medium for cleaning, and there is no cleaning agent residue while killing microorganisms .

The care instrument of the invention can clean any type of corneal contact lens without special care solution, and has strong compatibility.

It can be seen that the nursing device of the present invention will lead the development of a new generation of contact lens cleaning and disinfection products.

Description of drawings

Fig. 1 is a kind of specific structural representation of nursing apparatus of the present invention;

Fig. 2 is a kind of specific structural representation of centrifugal cleaning part;

Fig. 3 is a kind of specific structural schematic diagram of silica gel mesh structure mirror box;

Fig. 4 is a kind of specific structural representation of water tank;

Fig. 5 is a specific structural schematic diagram of the control circuit.

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

1. Structural design and operation control of the nursing instrument

Nursing instrument of the present invention comprises shell, water tank, ultraviolet lamp, miniature drainage pump, centrifugal cleaning part, and control circuit; As shown in Figure 1, is a kind of specific structure of nursing instrument of the present invention, and this example is only used for the scheme of the present invention They are presented by way of illustration and not limitation of the scope of the invention. In this example, the nursing instrument includes: shell base 1, rectifier 2 of 12-watt ultraviolet lamp, miniature drainage pump 3, power switch 4, two ultraviolet lamp tubes (each 6 watts) 5, water tank 6, middle frame (with There are start button and LED indicator light) 7, pcb circuit board 8, two mirror boxes of silica gel mesh structure 9, rotating main bracket 10, centrifugal motor 11, upper cover 12; the middle frame 7 is fixed on the base 1, and the middle frame The hollow part of 7 faces the water tank 6, and the loam cake 12 is arranged on the top of the middle frame 7. After closing, an airtight space is formed between the loam cake 12, the middle frame 7 and the base 1; the water tank 6 is used for holding water, and its two side walls are provided with Transparent window (as Fig. 4) is arranged, and transparent window adopts the quartz glass that UV transmittance reaches 95%, thickness 0.8mm, respectively establishes an ultraviolet lamp 5 outside each transparent window, is provided with water outlet on the water tank, this outlet The water outlet is connected to the micro drainage pump 3, and the water outlet of the micro drainage pump 3 is connected to the drainage port located on the base 1, as shown in Fig. The shaft is fixedly connected; two silicone mesh structure mirror boxes 9 are respectively installed under the two ends of the rotating main support, and the structure of the silicone mesh structure mirror box 9 is shown in Figure 3.

The pcb circuit board 8 is provided with a control circuit to control the work of the centrifugal motor, the ultraviolet lamp and the miniature drainage pump. The present invention is based on the rotary centrifugal method. Since the mass of the lens is very small, it is enough to provide only 1 to 3 watts of direct current power. After repeated tests, the rotation frequency is 2 forward and reverse rotations per second. The cleaning time After many repeated tests and observations, 3 minutes/time is the best, and there is no protein and lipid residue in eye fluid under high-power microscope observation. Figure 5 is a specific control circuit structure, wherein: FU is a fuse, BTA is a 3-amp triac, T1 is a five-watt 5V switching power supply, D1-3 is an LED indicator light, and B is a 12-watt ultraviolet lamp rectifier. MOC4041 is a thyristor trigger optocoupler, Q1-2 is AO3401 field effect transistor, Q3-6 is AO3400 field effect transistor, M1 is a centrifugal motor, M2 is a micro drainage pump motor, R1, 9, 10 are 1K resistors, R2～ 7 is a 10k resistor, R8 is a 10 ohm resistor, R11~16 is a 100k resistor, R17 is a 2.2k resistor, and R18 and 19 are 120k resistors. The working process of the circuit is as follows: put down the AN1 button, the single chip microcomputer pic12f683 starts to work, and the working signal of 2 revolutions per second is sent out from pin 7, and the "H" work composed of Q1, 2, 3 and 4 is triggered by D6, R4, R6 and Q5. So that the motor M1 works, and the lens can be repeatedly cleaned in pure water for 3 minutes in the silica gel mesh structure mirror box. After 3 minutes, the 3rd pin and the 2nd pin of the single chip microcomputer give output signals respectively, and drive M2 to drain the water in the water tank. At the same time, the ultraviolet light is turned on, and the lens is dried, dehydrated and disinfected. Once the set time is up, the lens drying and disinfection system will be turned off.

The whole operation process of the above-mentioned nursing device is as follows: place the lenses to be washed in the silica gel mesh structure mirror box 9 respectively, put 100ml of pure water in the water tank 6, cover the upper cover 12, plug in the power supply, turn on the power switch k, The LED on the middle frame will have an indication, and then press the AN start button, the centrifugal motor will control the lens to perform forward and reverse operation 2 times per second in the water tank; after 3 minutes, the instrument will automatically turn the lens in the water tank 100ml of pure water is discharged out of the instrument; at the same time, the two ultraviolet lamps will automatically light up, and the centrifugal motor is still running at this time. During the operation, all parts of the lens will be irradiated by ultraviolet rays. , the remaining water droplets on the lens will be completely dried. After another 3 minutes, the instrument automatically turns off the ultraviolet lamp and the centrifugal motor stops rotating. At this time, the cleaning and disinfection of the contact lens is completed.

2. Verification of the cleaning and disinfection effect of the nursing instrument

A contact lens cleaning instrument currently on the market and the nursing instrument of the present invention are selected to carry out cleaning and disinfection experiments, and a biological indicator resistance test is used for verification.

The microorganisms used are:

Bacteria: Staphylococcus aureus ATCC25923, Pseudomonas aeruginosa ATCC27853, Streptococcus pneumoniae ATCC49619, Staphylococcus epidermidis;

Fungi: Candida albicans ATCC14053, Fusarium;

Among them, Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus pneumoniae, and Candida albicans were all standard strains preserved in the First Affiliated Hospital of Zhejiang University School of Medicine; The clinical strains detected in the laboratory all came from the secretion of corneal scrapings.

Taking Staphylococcus aureus as an example, the test procedure is as follows:

Divide the sterilized contact lens lenses into 6 groups, each group repeats six lenses, adjust the turbidity of the fresh culture of Staphylococcus aureus (18-24 hours) to 0.5Mcf with sterile saline, which is equivalent to 10 ⁸ cfu/ml bacterial suspension. Drop 10ul of the bacterial suspension on the sterilized lens, suck off the excess bacterial solution with a sterile dropper, let it dry and set it aside for later use.

(1) Negative control group: no treatment

(2) Positive control group: drop staining with bacterial suspension, without washing

(3) Standard cleaning group: After washing hands with mild neutral soap, put 4 drops of Boston Cleansing Care Solution on the palm of your hand and put it on the mirror. Carefully rub both sides of the lens for 20 seconds, then rinse with Bostons Cleansing Lens for 5 seconds.

(4) Care solution cleaning group of the comparison cleaning device (that is, the corneal contact lens cleaning device in the market): place the lens, put in Boston's new cleaning care solution, power on, turn on, clean the lens according to the standard procedure of the cleaning device, and then take out the lens.

(5) Compared with the cleanser (that is, the corneal contact lens cleaner on the market) pure water cleaning group: place the lens, put in pure water, turn on the power, clean the lens according to the standard procedure of the cleaner, and then take out the lens.

(6) Nursing instrument cleaning group of the present invention:

Place the lens in the care device, add 100ml of pure water, close the lid, turn on the power, and press the cleaning switch. After 3 minutes of cleaning, the water is discharged from the drain pipe under the instrument, and the machine automatically starts the UV lamp with an internal power of 12W to irradiate for 3 minutes. The overall working time is 6 minutes, and the lens is taken out after the end.

After group cleaning, put the corneal contact lens in 2ml of ordinary nutrient broth (Hangzhou Tianhe) and incubate in a constant temperature incubator at 35°C±1°C for 18-24 hours, and observe the turbidity of the broth. At the same time, 10 ul of the broth was inoculated on a Columbia blood agar plate (Bio-Mélieux, France) to observe whether the growing colony was the inoculum. Tests on Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Streptococcus pneumoniae and Candida albicans were carried out according to the above procedure. For Fusarium mold, the following method is adopted: contact the sterilized lens with the fresh culture of Fusarium mold for a certain period of time, and then consider that the contamination is successful, treat each group of lenses separately according to the above grouping conditions, and apply the lens directly on the sand protection after cleaning. cultured in a 35°C incubator for 18-24 hours to observe the results.

Each of the 6 control microorganisms was tested 6 times, two lenses each time, and a total of 72 cleanings were performed. The cleaning effect of several cleaning methods is measured by several standards such as appearance observation (cleaning solution residue), broth culture (broth turbidity) and plate culture (whether it is inoculated bacteria), and the aseptic growth is qualified, and the qualified rate is calculated See Table 1.

Table 1 Comparison of cleaning effects of different cleaning groups for contact lenses

Note: *72 cases of residual cleaning solution were observed in 72 times of cleaning;

△ 2 cases of broth cultured in 72 washes were turbid;

▲Bacteria grew in 2 cases after plate culture in 72 times of cleaning, and the growing bacteria were inoculum bacteria.

Claims (10)

1. a kind of contact lens cleaning and sterilizing care instrument based on physical method, which is characterized in that including shell, water tank, purple Outer lamp, micro-drainage pump, eccentric cleaning component and control circuit；

The shell includes groove profile pedestal, center and upper cover, and water tank, ultraviolet lamp and micro-drainage pump are all set in groove profile pedestal Interior, center is fixed on pedestal, and the hollow part face water tank of center, and upper cover is openably set to above center, after closing on Confined space is formed between lid, center and groove profile pedestal；

For the water tank for being filled with water, side wall is equipped with transparent window, and ultraviolet lamp is set to outside transparent window, and water tank is equipped with water outlet Mouthful, which is connected with micro-drainage pump, and the water outlet of micro-drainage pump is connected with the discharge outlet being set on groove profile pedestal；

The eccentric cleaning component includes two silica gel for being centrifuged motor, rotation main support and being fixed under rotation main support Reticular structure mirror case, centrifugation motor are set to upper cover bottom surface, and rotation main support is fixedly connected with the output shaft for being centrifuged motor；

The work of control circuit control centrifugation motor, ultraviolet lamp, micro-drainage pump.

2. the contact lens cleaning and sterilizing care instrument according to claim 1 based on physical method, which is characterized in that institute The silica gel reticular structure mirror case stated is the hollow out mirror case of silica gel material, reticular structure, for placing contact lens.

3. the contact lens cleaning and sterilizing care instrument according to claim 1 based on physical method, which is characterized in that institute The two silica gel reticular structure mirror cases stated are divided into the both ends of rotation main support.

4. the contact lens cleaning and sterilizing care instrument according to claim 1 based on physical method, which is characterized in that institute The transparent window stated uses quartz glass.

5. the contact lens cleaning and sterilizing care instrument according to claim 4 based on physical method, which is characterized in that institute The water tank two sidewalls stated are equipped with quartz glass transparent window, and a ultraviolet lamp is arranged outside each transparent window.

6. the contact lens cleaning and sterilizing care instrument according to claim 1 based on physical method, which is characterized in that institute It is provided with LED light on the disinfection nursing instrument stated, is used for display working condition.

7. the contact lens cleaning and sterilizing care instrument according to claim 1 based on physical method, which is characterized in that institute Be provided with control button on the disinfection nursing instrument stated, press rear care instrument and worked as follows automatically: centrifugation motor is positive, reversed It is alternately rotated after a certain period of time, ultraviolet lamp lights, micro-drainage pump work, then after a period of time, ultraviolet lamp is closed, centrifugation electricity Machine stops rotating.

8. the contact lens cleaning and sterilizing care instrument according to claim 7 based on physical method, which is characterized in that institute The speed for the centrifugation motor rotation stated is 2 positive and negative rotation campaign/seconds, and after rotation 3 minutes, ultraviolet lamp is lighted, micro-drainage pump Starting, after 3 minutes, ultraviolet lamp is closed, and centrifugation motor stops rotating.

9. the contact lens cleaning and sterilizing care instrument according to claim 8 based on physical method, which is characterized in that institute The general power for the ultraviolet lamp stated is 12W.

10. the contact lens cleaning and sterilizing care instrument according to claim 1 based on physical method, which is characterized in that The control circuit is based on chip microcontroller.