CN2584127Y

CN2584127Y - Ophthalmotonometer assaying device

Info

Publication number: CN2584127Y
Application number: CN 02245162
Authority: CN
Inventors: 李祖斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-15
Filing date: 2002-12-15
Publication date: 2003-11-05
Anticipated expiration: 2012-12-15

Abstract

The utility model discloses a tonometer detecting device which comprises an electronic balance and a micrometer connected into integration by a bracket, wherein, the bracket is composed of a base, a guide rail, a fixed cantilever and a sliding bracket; the electronic balance for detecting quality and the micrometer for detecting scales lie in the same work surface. A tonometer mounting hole on the sliding cantilever is concentric with the scale pan of the electronic balance; the micrometer, the bracket and a measuring needle arranged at the centre of the scale pan can be fitted to detect scale indexes; the electronic balance, the bracket and the micrometer can be fitted to detect both static quality indexes and dynamic quality indexes. Thus, the utility model completely satisfies the detecting requirements for correlation indexes of the tonometer by detection regulation in China, fills blanks of tonometer detecting devices in China, and has the advantages of simple structure, convenient and fast operation, high precision and low cost.

Description

The tonometer assay device

Technical field

This utility model relates to a kind of assay device of measurement instrument, specifically, is a kind of tonometer assay device.

Background technology

Tonometer is a kind of diagnostor that the doctor is used to diagnose patient's oculopathy or other relevant disease, its principle is the sunken degree of depth of the pressure of cornea to be measured indirectly the instrumentation of intraocular pressure according to the pressing of certain mass, and the canthus mould that each lattice on its graduated scale are equivalent to 1/20mm falls into the degree of depth.Judge the whether qualified index that mainly contains two aspects of tonometer: the one, pressing and whether be attached to the quality of associated fitting on the pressing, specific weight qualified; The 2nd, whether the scale of tonometer graduated scale is accurate.Because the precision of tonometer is concerning the judgement of doctor to patient disease, direct relation human life health, China's metric method regulation, list it measurement instrument catalogue of compulsory verification in, and worked out in 1988 " (the indentation tonometers vertification regulation " (JJG574-88), but owing to there is not corresponding standard verification equipment, up to now, the tonometer calibration operation is not all carried out in the nationwide.Therefore, development, exploitation tonometer assay device have become the essential of present technique field.

According to the knowledge of the applicant: at present in the world to the calibrating of tonometer, adopting the index (rest mass) of electronic balance calibrating quality aspect, adopt the index of micrometer calibrating scale aspect, is the calibrating of separate type.According to China's vertification regulation, also must examine and determine the quality (dynamic mass) of tonometer under different scales, this just requires quality arbitration device and calibration device to be in to cooperatively interact on the same work top just can examine and determine, and the calibrating means and the instrument of separate type obviously can not meet the demands.

Summary of the invention

The purpose of this utility model is to provide a kind of tonometer assay device that can satisfy China's vertification regulation requirement, fills up the blank of this technical field, and the tonometer calibration operation is carried out.

The purpose of this utility model is to adopt such technical scheme to realize: a kind of tonometer assay device, comprise electronic balance, micrometer, its electronic balance and micrometer link into an integrated entity by support, and both are on the same work top to make electronic balance, micrometer; Described support is made of base, guide rail, cantilever mounted, sliding gib, and fixedlying connected with cantilever mounted in the upper end of guide rail, fixedlys connected with base in the lower end, and an end and the guide rail of sliding gib is slidingly matched, the other end is provided with tonometer installing hole and trip bolt; Cantilever mounted, sliding gib are positioned at guide rail homonymy and vertical with it, are respectively equipped with the micrometer installing hole on it; The blade of described micrometer is fixedlyed connected with cantilever mounted, and the chi head of micrometer is fixedlyed connected with sliding gib; The base of support is fixed on the work top of electronic balance, and guide rail is vertical with work top, during the pan of a steelyard of tonometer installing hole and electronic balance is same; The pan of a steelyard center of described electronic balance is provided with metering pin.

The cross section of described guide rail is circular, and sliding gib is suitable with it.

The cross section of described guide rail is a rectangle, and sliding gib is suitable with it.

Described micrometer is a micrometer.

The beneficial effects of the utility model are: because the micrometer that is used for the electronic balance of quality arbitration and is used for calibration is in same work top, and the pan of a steelyard of the tonometer clamping hole on the sliding gib and electronic balance same in, the pan of a steelyard center is provided with metering pin; Micrometer cooperates with support, metering pin can examine and determine the scale index, and electronic balance cooperates with support, micrometer, both can examine and determine the rest mass index, can examine and determine the dynamic mass index again, satisfies the requirement of China's vertification regulation to the calibrating of tonometer index of correlation fully.This device approved product is the repacking of electronic balance and micrometer, only needs the processing support, and being assembled into one gets final product, simple and reasonable, convenient to operation, the precision height, and cost is low.

Description of drawings

Fig. 1 is a schematic appearance of the present utility model;

Fig. 2 is structure diagram of the present utility model (for understanding this device, tonometer has drawn);

Fig. 3 is that A-A is a kind of fit structure of guide rail 21, sliding gib 20 shown in this figure to cutaway view among Fig. 2;

Fig. 4 is that A-A is the another kind of fit structure of guide rail 21, sliding gib 20 shown in this figure to cutaway view among Fig. 2.

The specific embodiment

Further specify this utility model below in conjunction with accompanying drawing:

The tonometer that this tonometer assay device relates to (prior art is shown in Fig. 2 left part) by graduated scale 1, support 2, pointer 3, hammer bow 4, additional weight 5, fixedly counterweight 6, pressing 7, sole pipe 8, hold handle 9 and form.Holding handle 9, sole pipe 8, support 2, graduated scale 1 is fixedly linked successively and is integral body, pointer 3, hammer bow 4 are an integral body, and flexibly connect with support 2, and pressing 7 is loaded in the mesopore of sole pipe 8, its waist is laid fixedly counterweight 6 and additional weight 5, and sole pipe 8 is loaded on again in the mesopore of holding handle 9; When tonometer is unloaded, the needle point of pressing 7 does not contact with hammer bow 4, pointer 3 is in graduated scale 1 " 20 " position, when measuring intraocular pressure, doctor's hands grab handle 9 also makes tonometer vertical as far as possible, the head of pressing 7 is pressed on patient's eyeball, and continue to press down, to the sphere applying eyeball of sole pipe 8 bottoms, the pressure of eyeball overcomes pressing 7, counterweight 5,6, hammer bow 4, the gravity of pointer 3, make pressing 7 to top offset, promote upwards swing of hammer bow 4, drive pointer 3 to " 0 " direction deflection, deflection angle and eyeball pressure are proportional, therefore, the indicating value of pointer 3 can characterize eyeball pressure on the graduated scale 1.

This tonometer assay device, referring to Fig. 1-Fig. 4: electronic balance I (comprising display keyboard and transparent day plain bonnet) is connected in one by bracket I II with micrometer II, and its electronic balance I, micrometer II are known technology.Described bracket I II is made of base 23, guide rail 21 and cantilever mounted 16, sliding gib 20, the upper end of guide rail 21 by screw 17 fixedly connected with cantilever mounted 16, the lower end fixedlys connected with base 23, an end and the guide rail 21 of sliding gib 20 is slidingly matched, the other end is provided with the tonometer installing hole and trip bolt 10; Cantilever mounted 16, sliding gib 20 are positioned at guide rail 21 homonymies and vertical with it, are respectively equipped with micrometer II installing hole on it; The blade 14 of described micrometer II is fixedlyed connected by screw 15 with cantilever mounted 16, and the chi head 18 of micrometer II is fixedlyed connected by screw 19 with sliding gib 20; The base 23 usefulness screws 22 of bracket I II are fixed on the work top 13 of electronic balance, and guide rail 21 is vertical with work top 13, the pan of a steelyard of tonometer installing hole and electronic balance I 12 with in; Pan of a steelyard 12 centers of described electronic balance I are provided with metering pin 11; The cross section of guide rail 21 is circular (as shown in Figure 2); Perhaps the cross section of guide rail 21 is rectangle (as shown in Figure 3), is provided with maintainance block 25 in the end of sliding gib 20, and is fixed on the sliding gib 20 with screw 24.

This tonometer assay device is reequiped with approved product, and quality weighing adopts electronic balance I (as JD series multifunctional electronic balance), installs metering pin 11 additional at pan of a steelyard 12 centers, and its key technical indexes is: measuring range: 0-100g; Minimum resolution: 0.001g; Repeatability error: 0.001g; Nonlinearity erron: 0.002g; Stabilization time: 5 seconds; Operating temperature: 5-40 ℃; Scale is measured and is adopted micrometer II (being micrometer), measuring range: 0-5mm; Minimum resolution: 0.001mm; Other processes bracket I II, and being assembled into one gets final product.

The operational approach of this tonometer assay device is as follows:

Press the instructions for use of electronic balance I, this device is laid the adjustment level, and calibration, transfer " zero ".

Quality arbitration:

1, additional weight 5 quality arbitrations: routinely counterweight is put in weighing on the pan of a steelyard 12 of electronic balance I, the reading quality value, (the counterweight allowable error of each specification is ± 0.02g) contrast with standard;

2, fixedly counterweight 6, pressing 7, pointer 3, the 4 assembling gross masses calibratings of hammer bow: tonometer is pacified in the hole of sliding gib 20 of support 27, and fixedly hold handle 9 with screw 10, adjust micrometer II, chi head 18 is stretched out, and sliding gib 20, tonometer descend, and are withstood by metering pin 11 to the lower end of pressing 7, continue downward modulation, pointer 3 is indicated respectively in " 5 " of graduated scale 1 and the position of " 10 ", and read two place's quality weighing values respectively, with standard (all should within 5.5g ± 0.3g) contrast;

3, tonometer gross mass calibrating: on the basis of above-mentioned the 2nd calibrating, continue the chi head 18 of downward modulation micrometer II, the all-mass that tonometer is dropped to except that holding handle 9 is applied on the metering pin 11, and reading quality weighing value is with standard (16.5g ± 0.5g) contrast;

Error of indication calibrating:

Tonometer vertically is put on the zero-bit checking table (conventional tester is equipped with in addition), adjusts the pointer 3 of tonometer, make its aligning " 0 " scale; Again tonometer is positioned on this assay device, adjusts micrometer II, withstood by metering pin 11, and make pointer 3 aim at " 0 " scale to the lower end of pressing 7; Adjust micrometer II, make 18 withdrawals of chi head, sliding gib 20, tonometer rise, and pressing 7 is to bottom offset, and hammer bow 4 is to lower swing, drive pointer 3 to " 20 " direction deflection, when pointer 3 is aimed at " 5 ", " 10 ", " 15 ", " 20 " each scale respectively, read the measured value on the micrometer II respectively, operation should be slow, can only must not adjust back to a direction adjustment; Adjust pointer 3 then, make its aligning " 20 " scale, carry out the revesal calibrating, adjust micrometer II in the other direction, make pointer 3 to " 0 " direction deflection, when pointer 3 is aimed at " 15 ", " 10 ", " 5 ", " 0 " each scale respectively, read the measured value on the micrometer II respectively, must not adjust back equally.

The error of indication is calculated as follows:

δ＝S-L/0.05

In the formula: the δ-tonometer error of indication (lattice)

S-tonometer reading (lattice)

L-micrometer reading (mm)

0.05-the pressure of each lattice correspondence falls into the degree of depth (mm/ lattice) and will calculate the gained error of indication and following standard control on the graduated scale:

Indicating value (lattice) indicating value allowable error (lattice) indicating value allowable error (mm)

0 ±0.3 ±0.015

5 ±0.3 ±0.015

10 ±0.4 ±0.020

15 ±0.6 ±0.060

20 ± 1.0 ± 0.050 by above-mentioned every contrast, can judge whether tonometer is qualified.

Claims

1. a tonometer assay device comprises electronic balance, micrometer, it is characterized in that: electronic balance and micrometer link into an integrated entity by support, and electronic balance, micrometer are on the same work top; Described support is made of base, guide rail, cantilever mounted, sliding gib, and fixedlying connected with cantilever mounted in the upper end of guide rail, fixedlys connected with base in the lower end, and an end and the guide rail of sliding gib is slidingly matched, the other end is provided with tonometer installing hole and trip bolt; Cantilever mounted, sliding gib are positioned at guide rail homonymy and vertical with it, are respectively equipped with the micrometer installing hole on it; The blade of described micrometer is fixedlyed connected with cantilever mounted, and the chi head of micrometer is fixedlyed connected with sliding gib; The base of support is fixed on the work top of electronic balance, and guide rail is vertical with work top, during the pan of a steelyard of tonometer installing hole and electronic balance is same; The pan of a steelyard center of described electronic balance is provided with metering pin.

2. tonometer assay device according to claim 1 is characterized in that: the cross section of described guide rail is circular, and sliding gib is suitable with it.

3. tonometer assay device according to claim 1 is characterized in that: the cross section of described guide rail is a rectangle, and sliding gib is suitable with it.

4. tonometer assay device according to claim 1 is characterized in that: described micrometer is a micrometer.