CN213149349U - Automatic and manual zoom mechanism based on slit lamp xerophthalmia inspection instrument - Google Patents

Abstract

An automatic and manual zooming mechanism based on a slit lamp xerophthalmia inspection instrument comprises an optical body zooming drum seat, an optical body zooming drum, a zooming hand wheel and an electric driving mechanism; the optical body zooming drum is arranged in the optical body zooming drum seat, and two ends of the optical body zooming drum are respectively connected with a zooming hand wheel through connecting shafts; and an electric driving mechanism is arranged on the optical body zooming drum seat and is used for driving the optical body zooming drum to rotate. Firstly, the structure is simple, and the automatic zooming function of a Galileo optical system slit lamp and a slit lamp type xerophthalmia inspection instrument is convenient to realize; secondly, the automatic zooming function of the slit lamp of the Galileo optical system is realized, and meanwhile, the manual zooming function is reserved; and thirdly, the intelligent operation and the remote operation of the whole slit lamp and the slit lamp type dry eye inspection instrument are convenient to realize.

Description

Automatic and manual zoom mechanism based on slit lamp xerophthalmia inspection instrument

Technical Field

The utility model relates to the field of medical equipment, concretely relates to automatic and manual zoom mechanism based on slit lamp xerophthalmia inspection instrument.

Background

The eye is the most important organ in human sense, and about 80% of the knowledge in the brain is acquired by the eye. The eyes are needed to read the books and recognize words, watch pictures, watch figures, enjoy beautiful scenery and the like.

Dry eye is the most common and highly prevalent ocular surface disease. The disease incidence rate of the eye-protecting mask is 20-36% in China, the development trend of the eye-protecting mask shows an obvious growth trend due to the increase of eye-using frequency and the increase of eye-using time in recent years, and the eye-protecting mask has practical significance for the research of the disease on the health of human bodies.

Examination of dry eye, including: tear river height measurement, tear film break up time measurement, meibomian gland analysis, lipid layer analysis, eye margin analysis, eye red analysis, and the like.

There are three types of instruments that can accomplish the above dry eye examination project: the first type is an instrument developed on the basis of an original corneal topographer; the second type is an instrument developed on the basis of an original slit lamp and is provided with an additional dry eye cornea detection projection device; the third instrument is specially used for dry eye examination, which can only carry out dry eye item examination and has no other functions.

The patent improves dry eye examination instruments developed on the basis of the slit lamp, the second kind.

A slit-lamp microscope (referred to as slit-lamp for short) is an important instrument which is not necessary but few in ophthalmologic examination, is also the first extensive basic instrument for ophthalmologic routine examination, and is required to be configured forcibly by industry countries such as ophthalmologic diagnosis and treatment, ophthalmologic health care, optometry fitting and the like.

The structure of the slit lamp mainly comprises four parts: the slit illumination mechanism, the microscope optics body, moving platform mechanism, chin rest mechanism, wherein the optical system of microscope optics body has adopted ordinary alternately binocular optical system and Galileo optical system, and this patent is only to the slit lamp type xerophthalmia inspection instrument who adopts Galileo optical system.

The Galileo optical system belongs to a parallel optical system, the optical path of the Galileo optical system is parallel, and two beams of light with non-difference and parallel optical paths are adopted, so that the visibility of an image can be greatly improved.

A Galileo optical system (figure 7) adopted by a slit lamp optical body comprises a large objective lens assembly, a variable power objective lens assembly and an eyepiece lens assembly, wherein the variable power objective lens assembly comprises 2 groups of lenses rotating around a rotating center and a non-lens through light path, different variable power magnifications can be obtained by rotating and putting different lens groups and putting the lens groups in the positive and negative sequence in the direction, 4 power magnifications (6 times, 25.6 times, 10 times and 64 times) can be obtained by the 2 groups of lens groups, and 1 power (16 times) can be obtained by adding the non-lens through light path, and 5 power magnifications can be obtained in total.

Slit-lamp based dry eye examination instruments, dry eye examinations require different examination magnifications, for example: measuring the height of the lacrimal river, measuring the rupture time of the lacrimal film and analyzing the lipid layer by 16 multiplying powers; meibomian gland analysis 6 times; glandular opening measurement, eye red analysis 10-fold. In the current stage, the multiplying power of the non-automatic slit lamp type xerophthalmia inspection instrument is switched, a method of manually rotating the zoom objective lens is adopted, the multiplying power is needed, and the zoom hand wheel is manually rotated to rotate to the multiplying power. Its advantages are simple structure and high effect.

The existing automated scheme of the slit-lamp dry eye inspection instrument only covers the automatic X, Y, Z-direction movement of the platform; the automatic input and the projection of dry eye illumination projection device do not include slit lamp optical body microscope optical magnification automatic switch, and it has the problem:

when the dry eye automatic inspection is performed, if the magnification is not adjusted, the inspection of all items can be performed only by using an optical system with low magnification, and the resolution of an image is reduced when the high-magnification item is observed under low magnification, so that the judgment of a result and the realization of the result are influenced.

This patent is exactly the automatic zoom problem of solving Galileo slit lamp type xerophthalmia inspection instrument optical system zoom device, and the manual zoom function of compatible former optical system zoom device has solved a problem for realizing that the slit lamp is comprehensive electronic, intelligent simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide an automation and manual zoom mechanism based on slit lamp type xerophthalmia inspection instrument, concrete technical scheme is as follows:

the utility model provides an automatic and manual zoom mechanism based on slit lamp xerophthalmia inspection instrument which characterized in that: comprises an optical body zooming drum seat, an optical body zooming drum, a zooming hand wheel and an electric driving mechanism;

the optical body zooming drum is arranged in the optical body zooming drum seat, and two ends of the optical body zooming drum are respectively connected with a zooming hand wheel through connecting shafts;

and an electric driving mechanism is arranged on the optical body zooming drum seat and is used for driving the optical body zooming drum to rotate so as to realize electric zooming.

Further, the electric drive mechanism may be a gear mechanism or a geneva gear mechanism or a pulley mechanism. Further, the electric driving mechanism may be a gear mechanism, a sheave mechanism, a pulley mechanism, or the like.

Furthermore, the electric driving mechanism directly drives the optical body zooming drum to rotate by a motor.

Furthermore, the electric driving mechanism comprises a motor, a driving gear and a driven gear, the motor is installed on the optical body zooming drum seat, the driving gear is installed on the output end of the motor, and the driven gear is fixedly sleeved on the connecting shaft.

Further: the teeth on the driving gear are partial teeth, and the driving gear drives the driven gear to move intermittently through the partial teeth;

when the driving gear is not meshed with the driven gear, the driven gear and the connected optical body zooming drum can rotate freely together.

The utility model has the advantages that: firstly, the structure is simple, and the automatic zooming function of a Galileo optical system slit lamp and a slit lamp type xerophthalmia inspection instrument is convenient to realize;

secondly, the automatic zooming function of the slit lamp of the Galileo optical system is realized, and meanwhile, the manual zooming function is reserved;

and thirdly, the intelligent operation and the remote operation of the whole slit lamp and the slit lamp type dry eye inspection instrument are convenient to realize.

Drawings

FIG. 1 is a front cross-sectional view of the structure of this patent;

FIG. 2 is a cross-sectional view of structure A-A of this patent;

FIG. 3 is a cross-sectional view of structure B-B of the present patent;

FIG. 4 is an exploded view of the structure of this patent;

FIG. 5 is a schematic view of the structure of the present patent;

FIG. 6 is a logic block diagram of the present patent;

FIG. 7 is a schematic view of an optical body of a slit-lamp Galileo system;

the figure is marked with a slit lamp chin rest mechanism 1, a slit lamp lighting mechanism 1, a microscope optical body 3, a slit lamp platform moving mechanism 4, a slit lamp Galileo system optical body large objective lens 5, a slit lamp Galileo system optical body zoom objective lens 6, a slit lamp Galileo system optical body eyepiece lens 7, an optical body left zoom hand wheel 301, a left baffle plate 302, a left adjusting ring 303, an optical body zoom drum seat 304, a large object seat 305, an optical body zoom drum 306, a driven gear 307, a right baffle plate 308, an optical body right zoom hand wheel 309, a driving gear end cover 310, a driving gear 311, a motor 312, a right spring piece retainer ring 313, a point position bearing 314, a mandrel 315, a left spring piece retainer ring 316 and a spring piece 317.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

As shown in fig. 1 to 6: an automatic and manual zooming mechanism based on a slit-lamp-type dry eye examination instrument comprises an optical body zooming rotary drum base 304, an optical body zooming rotary drum 306, an optical body left zooming hand wheel 301, an optical body right zooming hand wheel 309, a right baffle 308 and a left baffle 302.

An optical body zooming drum 306 is arranged in the optical body zooming drum seat 304, a left connecting shaft is arranged at the left end of the optical body zooming drum 306, a right connecting shaft is arranged at the right end of the optical body zooming drum 306, the left end of the left connecting shaft and the right end of the right connecting shaft respectively extend out of one side of the optical body zooming drum seat 304, an optical body left zooming hand wheel 301 is connected to the free end of the left connecting shaft, the optical body left zooming hand wheel 301 is connected to the free end of the left connecting shaft, an optical body right zooming hand wheel 309 is connected to the free end of the right connecting shaft, a driven gear 307 and a right baffle 308 are respectively sleeved on the right connecting shaft, and the right baffle 308 is positioned between the driven gear 307 and the optical body right zooming hand wheel 309;

the optical zoom drum base 304 is provided with a motor mounting hole, a motor 312 is mounted in the motor mounting hole, an output end of the motor 312 is connected with a driving gear 311, the driving gear 311 has partial teeth, in this embodiment, the driving gear 311 has seven teeth, and the driving gear 311 drives a driven gear to move intermittently.

When the driving gear 311 is not engaged with the driven gear 307, the driven gear 307 and the zoom drum 306 connected thereto are freely rotatable together.

The bottom of the optical zoom drum base 304 is provided with a clamping groove, a clamping mechanism is arranged in the clamping groove, the clamping mechanism comprises a right spring plate retainer ring 313, a point position bearing 314, a mandrel 315, a left spring plate retainer ring 316 and a spring plate 317, the upper surface of the spring plate 317 is provided with the mandrel 315 through a support seat, the middle of the mandrel 315 is sleeved with the point position bearing 314, and the left end and the right end of the mandrel 315 are respectively provided with the left spring plate retainer ring 316 and the right spring plate retainer ring 313. The point position bearing 314 is used for clamping the optical body zooming drum 306. The circumference of the optical body zooming drum 306 is provided with a clamping groove, and when the groove of the optical body zooming drum 306 rotates to the position bearing 314, the elastic sheet 317 drives the position bearing 314 to be clamped into the corresponding clamping groove.

The utility model discloses the theory of operation: partial meshing teeth (only partial teeth are reserved) are removed from the driving gear, and when the driving gear rotates, only the reserved teeth participate in driving the driven gear to rotate, so that when the driving gear rotates continuously, the driven gear does intermittent motion.

When the optical body zooming rotary drum needs to be adjusted manually, the driving gear rotates to a non-meshing position, the driven gear can rotate freely, the optical body left zooming hand wheel or the optical body right zooming hand wheel can be respectively rotated manually, the optical body left zooming hand wheel or the optical body right zooming hand wheel drives the optical body zooming rotary drum to rotate to a needed position through the corresponding connecting shaft, and the optical body left zooming hand wheel or the optical body right zooming hand wheel is clamped to the clamping groove in the zooming rotary drum through the positioning bearing arranged on the elastic piece to achieve accurate positioning.

When the optical body zooming drum needs to be automatically adjusted and calibrated, the motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the optical body zooming drum to rotate through the right connecting shaft, and when the driving gear rotates to a non-meshing position, the shifting drum just rotates to a positioning position, so that the same accurate positioning as manual operation is realized.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. The utility model provides an automatic and manual zoom mechanism based on slit lamp xerophthalmia inspection instrument which characterized in that: comprises an optical body zooming drum seat, an optical body zooming drum, a zooming hand wheel and an electric driving mechanism;

the optical body zooming drum is arranged in the optical body zooming drum seat, and two ends of the optical body zooming drum are respectively connected with a zooming hand wheel through connecting shafts;

and an electric driving mechanism is arranged on the optical body zooming drum seat and is used for driving the optical body zooming drum to rotate so as to realize electric zooming.

2. The slit-lamp-based dry eye inspection instrument automatic and manual zoom mechanism of claim 1, wherein: the electric drive mechanism may be a gear mechanism or a geneva gear or a pulley mechanism.

3. The slit-lamp-based dry eye inspection instrument-based automatic and manual zoom mechanism of claim 1, wherein: the electric driving mechanism directly drives the optical body zooming drum to rotate by a motor.

4. The slit-lamp-based dry eye inspection instrument automatic and manual zoom mechanism of claim 2, wherein: the electric driving mechanism comprises a motor, a driving gear and a driven gear, the motor is arranged on the optical body zooming rotary drum seat, the driving gear is arranged on the output end of the motor, and the driven gear is fixedly sleeved on the connecting shaft.

5. The slit-lamp-based dry eye inspection instrument automatic and manual zoom mechanism of claim 4, wherein: the teeth on the driving gear are partial teeth, and the driving gear drives the driven gear to move intermittently through the partial teeth;

when the driving gear is not meshed with the driven gear, the driven gear and the connected optical body zooming drum can rotate freely together.

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