CN203802441U - Flattening type tenonometer - Google Patents
Flattening type tenonometer Download PDFInfo
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- CN203802441U CN203802441U CN201420016936.9U CN201420016936U CN203802441U CN 203802441 U CN203802441 U CN 203802441U CN 201420016936 U CN201420016936 U CN 201420016936U CN 203802441 U CN203802441 U CN 203802441U
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Abstract
The utility model provides a flattening type tenonometer, relates to an intraocular pressure measuring device and particularly relates to a tenonometer for accurately measuring the intraocular pressure value and fit for glaucomatous diagnosis. The utility model aims to provide the flattening type tenonometer with short measuring time and high measuring accuracy. The flattening type tenonometer provided by the utility model utilizes a lever to amplify a reactive force of an eyeball for ten times and transfers to a mechanical sensor, so that the magnitude of the reactive force of the eyeball is acquired. When the eyeball is not in contact with the lower end face of a circular platform lens, local light of a light source is totally reflected to a light intensity detector by the circular platform lens; when the eyeball is in contact with the lower end face of the circular platform lens, the total reflection on the area of the eyeball in contact with the lower end face of the circular platform lens is avoided, so that the contact area can be acquired by comparing the light intensity before and after contact; the light intensity detection and the mechanical detection both can be instant detection, so that the detection time can be greatly reduced, the shaking phenomenon of a detector during a holding process caused by long detection time is prevented, and the measuring accuracy is increased.
Description
Technical field
This utility model relates to a kind of tonometry device, particularly relates to a kind of tonometer for Accurate Determining intraocular pressure value, is applicable to glaucomatous diagnosis.
Background technology
Intraocular pressure is intraocular pressure, refers to that eyeball content is for the pressure of wall of eyeball.Normal person's intraocular pressure is between 10～20mmHg (1mmHg=0.133kPa), and glaucoma is a kind of because ocular hypertension causes visually impaired irreversibility diseases causing blindness.Therefore, Accurate Determining intraocular pressure value, plays an important role for glaucomatous diagnosis.
Known have several different methods and corresponding equipment for determining intraocular pressure.Planishing type tonometer be by probe, press eyeball appearance (as cornea) to certain area and obtain corresponding pressure, thereby obtain intraocular pressure.For example, use goldmann's applanation tonometer to determine that intraocular pressure is an example of non-invasion formula method.This device measuring flattens the needed power of definite area (the circular surface region that is for example 3.06mm for diameter in this case) of the eyes that check.This equipment has the measurement main body of the pressing of being generally used for, and it comprises smooth applanation surface, and can set applied flattening pressure by knob.Then conventionally to this equipment calibration scale, thereby can directly read intraocular pressure by the scale from knob subsequently.This kind measuring method Measuring Time is long, measurement accuracy is poor.
Utility model content
The technical problems to be solved in the utility model is to provide the planishing type tonometer that a kind of Measuring Time is short, measurement accuracy is high.
This utility model planishing type tonometer, comprises shell, light source, little convex lens, round platform lens, large convex lens, light intensity detector, lever and mechanics sensor.
In described shell, be provided with light source, little convex lens, round platform lens, large convex lens, light intensity detector, described lever and mechanics sensor, lever right-hand member is by fulcrum shaft and shell chain connection.Lever left end is fixed with round platform lens.The axis of described round platform lens is perpendicular to lever.Described fulcrum shaft axis is provided with mechanics sensor to 1/10 place of round platform lens axis.Described mechanics sensor bottom is fixedly connected with shell, and mechanics sensor upper end contacts with lever.
Described round platform lens lower surface diameter is less than upper surface, and round platform lens bottom is through the round platform hole of shell.Described round platform hole and round platform lens matched in clearance, round platform lens upper end and support tube lower end are fixed.Described support tube is coaxial with round platform lens, is fixed with little convex lens in support tube, and support tube is made by light-proof material.Described little convex lens is coaxial with support tube, and the sealing of support tube upper end is fixed with baffle plate.Described baffle plate is made by light-proof material, and baffle shapes matches with support tube shape, and the middle part of baffle plate lower surface is fixed with light source.Described light source is positioned at support tube, and light source is positioned at little convex lens upside focus place.
Described baffle plate upside is fixed with support storehouse by support bar.Described support storehouse is cylinder, in support storehouse, by large support, is fixed with large convex lens.Described large convex lens is coaxial with little convex lens, and large convex lens upside focus place is provided with light intensity detector.The upper surface of described light intensity detector top and inside, support storehouse is fixed.
Described large convex lens diameter is more than or equal to round platform lens upper surface diameter.Described round platform lens upper surface diameter is greater than support tube diameter.Described support tube diameter is greater than little convex lens diameter.Described little convex lens diameter is greater than round platform lens lower surface diameter.
This utility model planishing type tonometer, wherein said shell left end is fixed with forehead support seat.Described forehead support seat comprises joint pin and contact lever.Described joint pin right-hand member is fixedly connected with shell left end, and joint pin left end is fixedly connected with contact lever upper end.Described contact lever lower surface is d1 to the distance of round platform lens lower surface, and ordinary people's eyeball is d2 to the distance of forehead.Described d1 equals d2.
This utility model planishing type tonometer, wherein said round platform lens upper surface is fixedly connected with cylindrical lens lower end.The diameter of described cylindrical lens is more than or equal to the diameter of round platform lens.Described lever is fixedly connected with round platform lens by cylindrical lens.Described support tube lower end is fixedly connected with round platform lens upper end by cylindrical lens.
This utility model planishing type tonometer, wherein said contact lever lower end is fixed with arc backing plate.Described arc backing plate is made by rubber or sponge material, and arc backing plate is vertical with contact lever.
This utility model planishing type tonometer, wherein said mechanics sensor, light intensity detector are connected with processing module.Described processing module is connected with display screen, and processing module, display screen are fixedly connected with shell.
This utility model planishing type tonometer, wherein said enclosure is fixed with battery.Described battery is connected with light intensity detector display screen, processing module, mechanics sensor.
This utility model planishing type tonometer, wherein said support bar is made by light transmissive material.
This utility model planishing type tonometer, the average that wherein said little convex lens diameter is the upper and lower end face diameter of round platform lens.
First this utility model planishing type tonometer difference from prior art is this utility model planishing type tonometer, by round platform lens lower surface, push down eyeball, make it can receive the counteracting force of eyeball, and by lever, the counteracting force of eyeball is amplified to ten times and pass to mechanics sensor, thereby learn the size of the counteracting force of eyeball.Secondly, when eyeball does not contact round platform lens lower surface, round platform lens by the part light total reflection of light source to light intensity detector, and during eyeball contact round platform lens lower surface, eyeball can make eyeball not produce total reflection with the area that round platform lens lower surface contacts, so the light intensity on light intensity detector can reduce, thereby the light intensity contrasting before and after contact is learnt contact area.Can measure by the power of depressing the area of eyeball and depress eyeball the pressure of eyeball inside.Because light intensity detects and mechanics detects and all can be moment and detect, greatly shortened detection time, and prevented that long-time detection from causing tester to hold the jitter phenomenon in process, increased the accuracy of measurement.
In this utility model planishing type tonometer, because eyeball is part comparatively fragile in human body organ, if apply excessive pressure, likely injure eyeball.If apply too small pressure, in holding, likely there is shake, cause measurement result inaccurate.Therefore this utility model comes auxiliary detection person stably to hold this utility model by forehead support seat, makes measurement result more accurate.This utility model is by increasing cylindrical lens, prevent because of being connected of directly fixedly causing with round platform lens side of lever unstable, or affect the effect of total reflection.This utility model can increase the contact area of contact lever by curved panel, thereby reduces pressure, more stable when contact lever is contacted with detected person's forehead, and more comfortable.This utility model receives the input signal of mechanics sensor and light intensity detector simultaneously by processing module, can calculate the now pressure of detected eyeball inside, and show on display screen.This utility model is powered by each electronic component of battery, has strengthened mobile power of test of the present utility model.The support bar that this utility model is made by transparent material, can avoid the light because of the ejaculation of support bar occlusion total reflection, and the light that light intensity detector is subject to dies down.This utility model, by controlling the diameter of little convex lens, can reduce the passage of light to greatest extent, and the light intensity that makes as far as possible light intensity detector receive is maximum, thereby more obviously embodies the diversity that light intensity changes.
Below in conjunction with accompanying drawing, planishing type tonometer of the present utility model is described further.
Accompanying drawing explanation
Fig. 1 is the front view of planishing type tonometer;
Fig. 2 is the index path of the lens of round platform shown in Fig. 1 total reflection;
Fig. 3 is the light path way of planishing type tonometer described in Fig. 1;
Fig. 4 is the front view that in Fig. 1, round platform lens do not press down eyeball;
Fig. 5 is the front view that in Fig. 1, round platform lens have pressed down eyeball;
Fig. 6 is that in Fig. 1, light intensity variable quantity and applanation area are related to schematic diagram.
The specific embodiment
As shown in Figure 1, this utility model planishing type tonometer comprises shell 1, light source 2, little convex lens 3, round platform lens 4, large convex lens 5, light intensity detector 6, lever 7 and mechanics sensor 15.
In described shell 1, be provided with light source 2, little convex lens 3, round platform lens 4, large convex lens 5, light intensity detector 6, lever 7 and mechanics sensor 15, described lever 7 right-hand members are by fulcrum shaft 71 and shell 1 chain connection.Lever 7 left ends are fixed with cylindrical lens 41.The diameter of described cylindrical lens 41 is more than or equal to the diameter of round platform lens 4.Described cylindrical lens 41 lower ends are fixedly connected with round platform lens 4 upper surfaces, cylindrical lens 41 axis and round platform lens 4 axis conllinear.The axis of described round platform lens 4 is perpendicular to lever 7.Described fulcrum shaft 71 axis are provided with mechanics sensor 15 to 1/10 place of round platform lens 4 axis.Described mechanics sensor 15 bottoms are fixedly connected with shell 1, and mechanics sensor 15 upper ends contact with lever 7.
Described round platform lens 4 lower surface diameters are less than upper surface, and round platform lens 4 bottoms are through the round platform hole 16 of shell 1.Described round platform hole 16 and round platform lens 4 matched in clearance, cylindrical lens 41 upper ends and support tube 31 lower ends are fixed.Described support tube 31 is coaxial with cylindrical lens 41, is fixed with little convex lens 3 in support tube 31, and support tube 31 is made by light-proof material.Described little convex lens 3 is coaxial with support tube 31, and support tube 31 upper end sealings are fixed with baffle plate 22.Described baffle plate 22 is made by light-proof material, and baffle plate 22 shapes match with support tube 31 shapes, and the middle part of baffle plate 22 lower surfaces is fixed with light source 2.Described light source 2 is positioned at support tube 31, and light source 2 is positioned at little convex lens 3 upside focus places.
Described baffle plate 22 upsides are fixed with support storehouse 23 by support bar 21.Described support bar 21 is made by light transmissive material.Described support storehouse 23 is cylinder, in support storehouse 23, by large support 51, is fixed with large convex lens 5.Described large convex lens 5 is coaxial with little convex lens 3, and large convex lens 5 upside focus places are provided with light intensity detector 6.The upper surface of described light intensity detector 6 tops and 23 inside, support storehouse is fixed.
Described mechanics sensor 15, light intensity detector 6 are connected with processing module 13.Described processing module 13 is connected with display screen 12, and processing module 13, display screen 12 are fixedly connected with shell 1.Described shell 1 inside is fixed with battery 14.Described battery 14 is connected with light intensity detector 6 display screens 12, processing module 13, mechanics sensor 15.
Described shell 1 left end is fixed with forehead support seat 11.Described forehead support seat 11 comprises joint pin 111 and contact lever 112.Described joint pin 111 right-hand members are fixedly connected with shell 1 left end, and joint pin 111 left ends are fixedly connected with contact lever 112 upper ends.Described contact lever 112 lower ends are fixed with arc backing plate.Described arc backing plate is made by rubber or sponge material, and arc backing plate is vertical with contact lever 112.Described contact lever 112 lower surfaces are d1 to the distance of round platform lens 4 lower surfaces, and ordinary people's eyeball 91 is d2 to the distance of forehead 92.Described d1 equals d2.
Described large convex lens 5 diameters are more than or equal to round platform lens 4 upper surface diameters.Described round platform lens 4 upper surface diameters are greater than support tube 31 diameters.Described support tube 31 diameters are greater than little convex lens 3 diameters.Described little convex lens 3 diameters are greater than round platform lens 4 lower surface diameters.
During use, tester's hand-held housing 1, and the arc backing plate on contact lever 112 is withstood to forehead 92.Then by this utility model energising, as shown in Figure 2, the diverging light of light source 2 reflects into directional light by little convex lens 3.As shown in Figure 3, directional light is mapped in large convex lens 5 outer toroid on backward by twice of the side total reflection of round platform lens 4 again.Large convex lens 5 is by parallel the focusing on light intensity detector after twice total reflection.Now light intensity detector 6 is learnt the size of total reflection light intensity.As shown in Figure 4, Figure 5, then round platform lens 4 lower surfaces are pressed down to eyeball 91 slowly, now mechanics sensor 15 is learnt the size of eyeball 91 counteracting forces by lever 7.
As shown in Figure 6, round platform lens 4 upper surface radiuses are R2, and lower surface radius is R1.R0=(R1+R2)/2, side and bottom surface angle are α, β=180 °-2 α wherein, establishing incident directional light light intensity is E0, on bottom surface, following bottom center is that center of circle radius is that light intensity E1 on the circumference of r is:
Light reflection during to upper bottom surface corresponding above bottom center be that center of circle radius is that light intensity on the circumference of r2 is:
Wherein:
r
1=R
0-rcosβ
r
2=R
0+rcosβ
By above formula, can calculate the luminous flux reducing when radius surface is R when flattening:
Now processing module 13 is calculated the pressure of eyeball 91 inside according to mechanics sensor 15, light intensity detector 6 and this formula, then is transferred on display screen 12, completes detection.
Above-described embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of this utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model, all should fall in the definite protection domain of this utility model claims.
Claims (8)
1. a planishing type tonometer, is characterized in that: comprise shell (1), light source (2), little convex lens (3), round platform lens (4), large convex lens (5), light intensity detector (6), lever (7) and mechanics sensor (15);
In described shell (1), be provided with light source (2), little convex lens (3), round platform lens (4), large convex lens (5), light intensity detector (6), described lever (7) and mechanics sensor (15), lever (7) right-hand member is by fulcrum shaft (71) and shell (1) chain connection, lever (7) left end is fixed with round platform lens (4), the axis of described round platform lens (4) is perpendicular to lever (7), described fulcrum shaft (71) axis is provided with mechanics sensor (15) to 1/10 place of round platform lens (4) axis, described mechanics sensor (15) bottom is fixedly connected with shell (1), mechanics sensor (15) upper end contacts with lever (7),
Described round platform lens (4) lower surface diameter is less than upper surface, round platform lens (4) bottom is through the round platform hole (16) of shell (1), described round platform hole (16) and round platform lens (4) matched in clearance, round platform lens (4) upper end and support tube (31) lower end are fixed, described support tube (31) is coaxial with round platform lens (4), in support tube (31), be fixed with little convex lens (3), support tube (31) is made by light-proof material, described little convex lens (3) is coaxial with support tube (31), the sealing of support tube (31) upper end is fixed with baffle plate (22), described baffle plate (22) is made by light-proof material, baffle plate (22) shape matches with support tube (31) shape, the middle part of baffle plate (22) lower surface is fixed with light source (2), described light source (2) is positioned at support tube (31), light source (2) is positioned at little convex lens (3) upside focus place,
Described baffle plate (22) upside is fixed with support storehouse (23) by support bar (21), described support storehouse (23) is cylinder, in support storehouse (23), by large support (51), be fixed with large convex lens (5), described large convex lens (5) is coaxial with little convex lens (3), large convex lens (5) upside focus place is provided with light intensity detector (6), and the inner upper surface in described light intensity detector (6) top and support storehouse (23) is fixed;
Described large convex lens (5) diameter is more than or equal to round platform lens (4) upper surface diameter, described round platform lens (4) upper surface diameter is greater than support tube (31) diameter, described support tube (31) diameter is greater than little convex lens (3) diameter, and described little convex lens (3) diameter is greater than round platform lens (4) lower surface diameter.
2. planishing type tonometer according to claim 1, it is characterized in that: described shell (1) left end is fixed with forehead support seat (11), described forehead support seat (11) comprises joint pin (111) and contact lever (112), described joint pin (111) right-hand member is fixedly connected with shell (1) left end, joint pin (111) left end is fixedly connected with contact lever (112) upper end, described contact lever (112) lower surface is d1 to the distance of round platform lens (4) lower surface, ordinary people's eyeball (91) is d2 to the distance of forehead (92), described d1, equals d2.
3. planishing type tonometer according to claim 2, it is characterized in that: described round platform lens (4) upper surface is fixedly connected with cylindrical lens (41) lower end, the diameter of described cylindrical lens (41) is more than or equal to the diameter of round platform lens (4), described lever (7) is fixedly connected with round platform lens (4) by cylindrical lens (41), and described support tube (31) lower end is fixedly connected with round platform lens (4) upper end by cylindrical lens (41).
4. planishing type tonometer according to claim 2, is characterized in that: described contact lever (112) lower end is fixed with arc backing plate, and described arc backing plate is made by rubber or sponge material, and arc backing plate is vertical with contact lever (112).
5. planishing type tonometer according to claim 4, it is characterized in that: described mechanics sensor (15), light intensity detector (6) are connected with processing module (13), described processing module (13) is connected with display screen (12), and processing module (13), display screen (12) are fixedly connected with shell (1).
6. planishing type tonometer according to claim 5, it is characterized in that: described shell (1) inside is fixed with battery (14), described battery (14) is connected with light intensity detector (6) display screen (12), processing module (13), mechanics sensor (15).
7. planishing type tonometer according to claim 6, is characterized in that: described support bar (21) is made by light transmissive material.
8. planishing type tonometer according to claim 7, is characterized in that: described little convex lens (3) diameter is the average of the upper and lower end face diameter of round platform lens (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016936.9U CN203802441U (en) | 2014-01-10 | 2014-01-10 | Flattening type tenonometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016936.9U CN203802441U (en) | 2014-01-10 | 2014-01-10 | Flattening type tenonometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203802441U true CN203802441U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420016936.9U Expired - Fee Related CN203802441U (en) | 2014-01-10 | 2014-01-10 | Flattening type tenonometer |
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| Country | Link |
|---|---|
| CN (1) | CN203802441U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106361265A (en) * | 2015-07-21 | 2017-02-01 | 明达医学科技股份有限公司 | Measurement apparatus and operating method thereof |
-
2014
- 2014-01-10 CN CN201420016936.9U patent/CN203802441U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106361265A (en) * | 2015-07-21 | 2017-02-01 | 明达医学科技股份有限公司 | Measurement apparatus and operating method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20160110 |