RU9702U1 - DEVICE FOR CORRECTING GLASSES AND LENSES CORRECTING GLASSES - Google Patents

Abstract

1. A device for selecting frames and lenses of corrective glasses, containing a lens-bearing bridge with a nose stop, with end longitudinal guides and squares, movably placed in each of the guides and equipped with horizontal and vertical measuring scales, carriages mounted on squares, lens holders mounted on carriages and equipped with a rotation mechanism, clamps of test eyeglass lenses and circular measuring scales, adjusting screws for moving squares and carriages respectively in g horizontally and vertically, and expanding earhooks, characterized in that it comprises a second bridge fastened to the lens-bearing bridge with measuring scales on which telescopically sliding earhooks are mounted with the possibility of independent longitudinal movement. 2. The device according to claim 1, characterized in that the sliding earhooks are made in the form of guides with stoppers and interchangeable inserts with measuring scales and with curved tips, of a corresponding size and taking into account differences in the anthropometric structure of the bases of the ears of the patients. The device according to claims 1 and 2, characterized in that each of the stoppers is made in the form of a screw with a decorative head, a pressure washer, a nut, a fastening screw head and a pressure washer, the locking parts motionless to each other, and springs, a screw head and a pressure washer pressing locking parts to each other with the possibility of their mutual movement. 4. The device according to claim 1, characterized in that the nose stop is removable, fixed, with supporting surfaces for the nose of the frame of the plastic frame, respectively

Description

DEVICE yes CHOICE AND LIQUID CHSRKPSHTOZK SCHOB

The proposal relates to medical equipment, namely to ophthalmic devices intended for the selection of frames and lenses of corrective glasses by the method of subjective testing.

Correctly selected frames and lenses for corrective glasses must satisfy the following requirements:

- The right must hold steady on the patient’s face, not falling off the nose when moving the head;

- the elements of the nose support of the rim and the knotted valley should be selected in accordance with the anthropometry data of the front part of the patient’s head and not be able to pretend to him n: psgk :: x inconvenience

and discomfort;

-the optical axis of the LLLS valley coincide with the centers of the pupils of the patient and with the direction of his gaze spun in front of him (Brief reference book of medical optics. I.I.d.Iyudet, -iM., Adalina D97C).

A well-known universal frame for selecting glasses (L.S. Urmacher, L.N. Aizenshtat Ophthalmic devices, Moscow, Medicine, 1968) - The frame contains a frame with two lenses, an emphasis for the bridge of nose and zaingip. The emphasis is movable and can be fixed in height in any explanation with a clamping screw.

The design of the earhooks of the rim is such that, in the working position, the rims of the earhook cover the patient’s gait, rest on the bases of the auricles, adjust and fix with the screws.

A known frame for selecting glasses, in which the earhooks are made of elastic sheet material, SDBCTKO are connected to the frame, are bent and spring-loaded towards each other and glue1: additional elastic elements are installed with the possibility of longitudinal and orthogonal fixation, and the nose support is made saglo-mounted on an elastic suspension, fixed on the frame (see Patent P JS 2C86I7I, G.PK 6 A 61 V 3/04).

ШК 6 А 61 В 3/04. A measuring device for fitting and centering ochose glasses to a selected frame is known (see German Patent DE 3217940 A 61 B 3/04). The device comprises a frame fastening system, including fastening means in the form of rollers installed in a spacer in the facet grooves of the frame. The supporting element of the device is a centering navigation bridge, on which a horizontal bar with rollers and L-shaped levers with vertically moving carriages carrying the same rollers are movably mounted. The carriages are mounted with the possibility of horizontal movement of the strut with screens smoldering the central holes of the alignment center of the corrective lenses. The device is not intended for the selection of frames and lens alignment corrective glasses. Known measuring glasses for installing spherical, prismatic and cylindrical glasses, containing a bridge with two carriages moving along it: - carrying rotary clips lens-containing, with a nose height meter and with adjustable earhooks. The nose height meter is equipped with a self-braking drive. Measuring scales are provided on the carriage; measurements are made of the interpupillary distance; and circular measuring scales of the angles of rotation of the lens holder are defined as the eye meridians of astigmatic eyes. The lcd holders are equipped with spring ribs for fixing the centering inserts with opaque screens having central holes, or test eyeglass lenses. Longitudinal movements of the carriages are carried out using quotation screws. The device provides a rotation mechanism of the lens holder for spherical and prismatic correction. The earhooks are fixed by means of telescoping sliding elements and an eccentric hinge, see European patent EP 0 567 S7 EE, IPC A 61 B 3/04. The device allows you to measure the intercentrosis distance, the height of the nasal stop relative to the optical centers of the lenses, the length of the ear hooks and the angle of their installation to the frame of the device.

At the same time, permanent rigid communication between the bridge and the lenses by the body with a change in the height of the nasal stop leads to an undesirable change in the angle between the optical axis of the lenses and the visual axes of the patient's eyes.

Tough: the connection between the temples and the lens mounts does not allow a sufficiently high degree of accuracy to take into account differences in the anthropometric structure of the patient’s head, to compensate for its natural asymmetry, and to ensure the asymmetry of the location of the lenses and temples with respect to the center of the nasal stop at equal opening angles.

In addition, additional errors in the measurement of the parameters of the required measurement and alignment of the lenses of corrective eyeglasses are caused by the presence of insufficiently accurate quotation mechanisms, measuring scales and fixation elements for test eyeglass lenses in the lens-holders: the test eyeglass lenses are pressed radially to the surfaces of the nests in the holders, the offset relative to the axis of the lens holder.

These shortcomings significantly increase the inaccuracies in the measurement of the parameters of the required measurement and alignment of the optical axes of the test lenses of the corrective glasses, thereby reducing the effectiveness of the correction of optical-functional visual impairments.

The technical result of the proposal is to obtain data for the production of corrective glasses that ensure the highest visual acuity achieved during the selection and increase the accuracy of their measurement and, thereby, the effectiveness of correction of visual impairment.

To achieve this result, a second bridge is additionally introduced into the device, including a lens-bearing bridge with a nose stop and longitudinal guides at the ends, drop-down earhooks of adjustable length, a suspension in the form of squares with measuring scales and carriages with lens-cutters, equipped with a mechanism for turning their clips and circular measuring scales with measuring scales and movably mounted on it with the possibility of longitudinal movement of the sliders with earhooks, also having measuring scales, and monolithic guides of the lens-bearing bridge, carriage guides and lens holders have vernier scales.

In this case, the nasal emphasis is made removable, fixedly installed, with the supporting surfaces of the nose pads of the plastic frame of the corresponding size and taking into account the differences in the anthropometric structure of the patient’s nose.

In addition, the nasal stop and the sliders with earhooks are fixed by means of stoppers, which are made in the form of a screw with a decorative head, a pressure washer, a nut, a fastening screw head and a pressure washer, fixed parts to each other, and spring holes, the receiving head of the screw and the most open lockable parts to each other with the possibility of their mutual displacement, and an element for fixing test eyeglass lenses made in the form of a thin elastic plate curved in an arcuate shape with slots on the s along the arc with the formation of the socket kandim lnnzoderyaatelya fixing petals with shaped end shoulders bent to the center linzodervatelya and contact klinovyg.sh ledges on inserts and trial spectacle lenses.

Figure 1-4 shows views of the device, respectively, front, top, rear and side.

Figure 5 is a diagram of a centering lens lense.

Figure 6 is a view of B on the rear view.

Figure 7 is a side view B of the lens holder.

In FIG. 8, a view of G from above is shown.

Figure 9 is a view of DD. Cutaway stopper.

In Fig. U is a view of the E-S. Section guides of a dynz-bearing bridge.

In Fig. II is a centering insert.

The device comprises a lens-bearing bridge I in the form of a metal strip with end parts forming the guides 1a and 16.

In the guide rails of the bridge are installed horizontal ends with the possibility of longitudinal movement of the squares 2 and 3, on which are applied horizontal measuring scales 2a, 3a and vertical measuring scales 26, 36.

At the vertical ends of the squares, SUBMITTED, carriages 4 and 5 are installed, which have guides 4a and 5a for squares and lens lenses 6,7, equipped with measuring dials 6a, 7a. Lens lenses contain rotary clips 8 and 9 with sockets for accommodating: centering inserts 10 or test eyeglass lenses II, each of which sews the same rims with a locking groove 10a below, shank 106 on top of the wedge-shaped ledges on the sides. Centering inserts have opaque screens with a central hole of small diameter d. The nests for both are formed by a series of internal cylindrical bores, with a cut of the upper half of the cage above the bores and cutouts in the lower part. The width of the nests in the corresponding width of the landing belt of the inserts. Faults with trial eyeglass lenses can be rotated around their centrally smallpox by handwheels 12 and IS of gear rotation mechanisms.

The longitudinal movements of the lens protectors are carried out by quotation screws 14 and 15, which move the squares 2 and 3 in the guides of the bridge I.

Vertical movements of the lens-holder Z are made with quotation screws 16 and 17, which move the carriages 4 and 5 along the angles 2 and 3.

In the middle part of the bridge I, one of the replaceable nose stops 18 is fixedly fixed, having a shank with a groove. The nose stop is fixed by a stop 19, including a screw 20 with a decorative head, a nut 21 with a spring 22 and a pressure washer 23.

The second bridge 24 with measuring scales 24a, 24b and with the sliders 25 and 26 moving along it with such non-stoppers 19. Fixed on the axles of the hinges 27 and 28, the opening lugs 29 and 30 are fixed on the lower ends of the sliders. The adjacent plane of the earhook is separated from the hinge axis at a distance of a. The angle of inclination of the earhooks to the frame of the lens protector / V is 80-85 degrees. The opening angle of the earhooks & is regulated by screws 31 and 32. The earhooks have a telescopically extendable design, which includes guides 33 and 34 pivotally connected to the sliders, removable inserts 35 and 36 movably mounted in them with measuring scales

curved tips of the appropriate size and taking into account differences in the anthropometric structure of the bases of the ears of the patients, as well as the stopper 19 for fixing the selected and measured length L, earhooks.

The latch 37 of the inserts 10 and the test eyeglass lenses II is made in the form of an elastic arcuate plate made of high-carbon sheet steel and worn in a bent position.

The arcuate plate of the retainer at the ends has a series of slots along the arc and a jumper left in the middle, which has holes for mounting on the holder of the lens holder. The slots form elastic petals with profiled shoulders bent to the axis of the lens holder above each holder nest. Due to this, the end sections of the petals provide a preload in the radial direction of the centering inserts and test eyeglass lenses through their wedge protrusions 106 to the inner surface of the nests, thereby reducing the errors of centering of the inserts with screens and test eyeglass lenses relative to the lens holder axes.

The measuring scales of the angles 2a, 3a and 26.36 and the circular scales 6a, 7a of the lens holders have additional nonius scales, 38, 39 and 40, respectively.

Work with the device is performed in the following order.

Taking into account the anthropological structure of the head, a removable nose stop 18 and replaceable inserts 35 and 36 are selected corresponding to a particular patient, they are installed in the device and stoppers 19 motionlessly fix the replaceable nose stop 18, on bridge I and are pressed to move the sliders 25 and 26 to the bridge 24 and interchangeable inserts 35 and 36 to the guides 33 and 34..

As a frame for corrective glasses, they put the device on the patient’s face, achieve a tight but not pressing fit of the nose stop 18 to the surface of the nose, and the behind the ears 29 and 30 to the temporal-occipital surface of the head and to the upper back part of the bases of the auricles, with the stoppers 19 fixed motionlessly pressed one lockable parts to each other and, thereby, provide a stable position on the patient's face of the device that simulated the frame of corrective glasses.

The parameters of the required corrective eyeglass frame are determined by the number of the replaceable nose stop 18, the number of replaceable inserts 35.36, and also taking the readings, ,,, Sp and Sl on the measuring scales on replaceable inserts 35.36 and on the second bridge 24.

For this, the reference point in the process of measuring the coordinates of the lens holder axes and the rim parameters is considered to be point 0 of the interchangeable nose stop lying in the vertical plane of symmetry NN and at the intersection of surfaces with radii / and /, interchangeable nose stop 18, whose centers also lie in the plane of symmetry NN.

According to preliminary measurements of the interpupillary distance A, for example, using a measuring ruler or a photoropter, screws 14 and 15 on the scales 2a, 3 make a preliminary installation of lens holders, for sizes A and A.

By rotating the quote screws 16.17 on scales 26, 36, the lens holder axes are arbitrarily pre-set at the heights hn and h /

Centering inserts 10 are inserted into the lens holder 6.7 closest to the eyes of the lens holder, first passing them into the guide ends of the retainer 37, and then pushing them all the way, while controlling the slight elastic compression of the wedge ledges 37 on the insert by the petal shoulders of the retainer 37.

At the intersection of the visual axes of 2-PEU Z /, Ј (Fig. 5) in the state of maximum relaxation of the oculomotor muscles right in front of the patient at a distance ae from the anterior major points of the eye, H „and H establish the fixation point of the eyes E (for example, in the form of a cross) and offer the patient to fix a look at her.

Clarify the position of the optical axes of the lenses by moving the lens holders with centering inserts horizontally with screws 14.15 and vertically with screws 16.17, and combining the holes of small diameter d inserts with the visual axes of the patient’s eyes. In this case, keeping a glance at the fixation point E, to ensure the merging of the images of the cross on the retinas of both eyes into a single visual image (fusion). The coordinates of the optical axes of the test eyeglass lenses / („, A / g and hn, h}, are determined by reading the readings on scales 2a, 3a and 26, 36 and refining them according to the corresponding vernier scales-38 and 39.

Centering inserts snap from the nests and are known. Using a subjective test method, test eyeglass JEHs are selected to obtain: the highest visual acuity for the eyes.

When correcting astigmatism and squint, spherocylindrical or prismatic eyeglass lenses are installed, respectively. The rotation of both lento-lenses Z when determining the position of the direction of the eye sections of the astigmatic and bases of prismatic lenses is made by the handwheels 12 and 13, and the rotation angles are counted on circular scales 6a and 7a with the refinement of their readings on noniuspl scales 40.

Introduction to the design of the device of the second bridge 24,

which are mounted with the possibility of longitudinal movement of the drop-down removable earhooks of adjustable length,

regardless of the position of the lens holders, it is possible to separately adjust the position of the ear hooks relative to the measuring base - the central point 0 of the nose stop 18, and thus, allows to take into account all the differences in the anthropometric structure and the natural asymmetry of the front part of the patient’s head, thereby significantly reducing the errors in the measured parameters of the spectacle frame.

The second bridge, which is fixedly connected to the lens-bearing bridge, with measuring scales, on which the earhooks are mounted with the possibility of separate and independent longitudinal movement from the lens holders, taking into account differences in the anthropometric structure of the patient’s head, interchangeable and fixed mounted nose stops and interchangeable inserts with measuring scales and curved tips of telescopically extendable earhooks and stoppers, lens holder suspensions, including carriages, squares and measuring scales, centering The inserts and spring clips of their position in the lens holders increase the stability of the device’s position on the patient’s face and make it easier to work with, provide the optical axis of the lenses along the centers of the pupils and visual axes of the patient, facilitate the selection of corrective lenses that provide the highest visual acuity for the eyes,

modeling the action of corrective glasses on the patient and more accurate measurement of the parameters of correcting corrective glasses and the coordinates of corrective lenses in them, allowing them to produce corrective glasses that provide visual acuity when selecting.

The presence of vernier scales 38.39.40 also increases the accuracy of measuring scales 2a, 26 and Za, 36, as well as circular scales 6a and 7a.

Claims (6)

1. A device for selecting frames and lenses of corrective glasses, containing a lens-bearing bridge with a nose stop, with end longitudinal guides and squares, movably placed in each of the guides and equipped with horizontal and vertical measuring scales, carriages mounted on squares, lens holders mounted on carriages and equipped with a rotation mechanism, clamps of test eyeglass lenses and circular measuring scales, adjusting screws for moving squares and carriages respectively in g horizontally and vertically, and expanding earhooks, characterized in that it comprises a second bridge fastened to the lens-bearing bridge with measuring scales, on which telescopically sliding earhooks are mounted with the possibility of independent longitudinal movement.  2. The device according to claim 1, characterized in that the sliding earhooks are made in the form of guides with stoppers and interchangeable inserts with measuring scales and with curved tips, of a corresponding size and taking into account differences in the anthropometric structure of the bases of the ears of the patients.  3. The device according to claims 1 and 2, characterized in that each of the stoppers is made in the form of a screw with a decorative head, a pressure washer, a nut, a fastening screw head and a pressure washer, the parts to be fixed motionless to each other, and a spring pressing the screw head and locking washer to each other locking parts with the possibility of their mutual movement.  4. The device according to claim 1, characterized in that the nasal emphasis is removable, fixed, with supporting surfaces for the nose of the frame of a plastic frame of the appropriate size and taking into account differences in the anthropometric structure of the nose of patients.  5. The device according to claim 1, characterized in that the clamp of the test eyeglass lenses is made in the form of an elastic arcuate plate, with slots at the ends along the arc and a jumper in the middle with the formation of fixing petals under each socket of the lens holder with profiled end shoulders, bent towards the center lens holder. 6. The device according to claim 1, characterized in that the lens-bearing bridge, carriages and lens holders have additional vernier scales.