CN115553708A

CN115553708A - Vision detection assistor

Info

Publication number: CN115553708A
Application number: CN202211006093.XA
Authority: CN
Inventors: 刘飞; 万进; 欧莉; 刘嘉琛; 田米; 周雪; 徐美琴; 冯茹
Original assignee: Anhui Medical College
Current assignee: Anhui Medical College
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2023-01-03

Abstract

The invention relates to the technical field of vision detection, in particular to a vision detection assistor, which comprises a shell, wherein a screen for receiving projection is arranged on the shell, an installation plate is arranged in the shell, a rotating shaft is rotatably arranged on the installation plate, a light source is fixedly connected onto the rotating shaft, a transparent glass sheet is fixedly connected onto the light source, an opaque material is used for drawing a visual target on the glass sheet, the E direction of the visual target can be changed by only driving the rotating shaft to rotate in the vision detection process, a patient only needs to recognize the direction of the visual target, pupils do not need to be deflected, the detection error is reduced, and the accuracy of a measurement result is improved.

Description

Vision detection assistor

Technical Field

The invention relates to the technical field of vision detection, in particular to a vision detection assistor.

Background

The detection of vision is very important in clinical ophthalmology, especially in the optometry process, in the prior art, ophthalmology medical staff and optometrists mostly adopt the visual chart to estimate the vision of a patient, however, in the prior art, the length of the visual chart is mostly about 90 centimeters, after the visual chart is installed, the difference between the highest point and the lowest point is about 80 centimeters, the patient needs to recognize the visual chart from top to bottom in the vision detection process, in the period, the pupil inevitably deflects, after the pupil deflects, the light emitted by the visual chart to the pupil cannot be emitted from the pupil central area, the brightness of the light emitted from the non-central area of the pupil is several times higher than that of the light emitted from the pupil central area, the external objects can reach the same subjective brightness, and the patient is influenced by the light brightness, the pupil is easy to expand or contract in the vision detection process, and further, the detection result error is large.

Disclosure of Invention

The invention aims to solve the defect that the error of a vision detection result is large due to the height difference of an eye chart in the prior art, and provides a vision detection assistor.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a visual detection assistor, includes the casing, be equipped with the curtain of receiving the projection on the casing, the inside mounting panel that is equipped with of casing, the rotatable pivot of installing on the mounting panel, the rigid coupling has the light source in the pivot, the rigid coupling has transparent glass piece on the light source use opaque material to draw the sighting mark on the glass piece.

Furthermore, a rotating structure is arranged on the mounting plate to drive the rotating shaft to rotate.

Further, revolution mechanic includes motor frame and motor, motor frame rigid coupling is in on the mounting panel, the motor rigid coupling is in on the motor frame, the rigid coupling has first incomplete friction pulley on the output of motor, the rotatable minor axis of installing on the mounting panel, minor axis one end rigid coupling has first friction pulley, and other end rigid coupling has the gear, first incomplete friction pulley with first friction pulley cooperatees, rotatable ring gear of installing on the mounting panel, ring gear with the gear phase-match, the rigid coupling has curved drive block on the ring gear, the rigid coupling has the slide bar on the ring gear, the rigid coupling has the baffle in the pivot, equidistant curved recess that is equipped with on the baffle, the drive block with the recess cooperatees, a plurality of notches have been seted up on the baffle, the slide bar with the notch cooperatees.

Furthermore, a brightness intensity adjusting mechanism is arranged on the mounting plate to adjust the intensity of the light projected on the curtain.

Further, brightness intensity adjustment mechanism includes connecting axle and light-passing board, the connecting axle is rotatable to be installed on the mounting panel, the transmittance of light-passing board reduces gradually, the light-passing board rigid coupling is in on the connecting axle, the rigid coupling has the second friction pulley on the connecting axle, the second friction pulley with first incomplete friction pulley phase-match, the rotatable third friction pulley of installing on the mounting panel, the third friction pulley with second friction pulley phase-match, the third friction pulley with first incomplete friction pulley phase-match.

Furthermore, a sighting target size adjusting structure is arranged in the shell to adjust the projection area of the sighting target on the curtain.

Further, the sighting mark size adjusting structure includes reciprocal screw rod, nut seat and convex lens, the rotatable installation of reciprocal screw rod on the mounting panel, the rigid coupling has the fourth friction pulley on the reciprocal screw rod, the rigid coupling has the incomplete friction pulley of second in the pivot, the incomplete friction pulley of second with fourth friction pulley phase-match, nut seat spiro union is in on the reciprocal screw rod, the convex lens rigid coupling is in on the nut seat, the light of light source transmission all passes through convex lens.

The vision detection assistor provided by the invention has the beneficial effects that: this visual detection assistor only needs the drive pivot to rotate at the visual detection in-process, can change sighting mark "E" direction, the patient only need identify the sighting mark direction can, need not to deflect the pupil, reduce detection error, improve measuring result's accuracy.

Drawings

Fig. 1 is a schematic structural diagram of an auxiliary device for vision testing according to the present invention.

Fig. 2 is a schematic structural diagram of the interior of the housing of the vision testing aid according to the present invention.

Fig. 3 is a front view of fig. 2 of a vision testing aid according to the present invention.

Fig. 4 is a partial cross-sectional view of fig. 2 of a vision testing aid in accordance with the present invention.

Fig. 5 is a partially enlarged view of fig. 3 of a vision testing aid according to the present invention.

Fig. 6 is a schematic structural view of the reciprocating screw and nut seat of the vision testing aid according to the present invention.

Fig. 7 is a schematic structural diagram of a mounting plate of an auxiliary device for vision testing according to the present invention.

Fig. 8 is a partially enlarged view of fig. 7 of a vision testing aid according to the present invention.

Fig. 9 is a sectional view of a mounting plate of the vision testing aid according to the present invention.

Fig. 10 is a plan view of a mounting plate of the vision testing aid according to the present invention.

Fig. 11 is a schematic structural diagram of the second incomplete friction wheel and the fourth friction wheel of the vision testing aid according to the present invention.

Fig. 12 is a schematic structural view of the cooperation of the baffle and the driving block of the vision testing assisting device provided by the invention.

Fig. 13 is a schematic structural view of a light-transmitting plate of the vision testing aid according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1 and 7-10, an auxiliary device for eyesight test comprises a housing 3, a screen 4 for receiving projection is arranged on the housing 3, a mounting plate 5 is arranged in the housing 3, a rotating shaft 16 is rotatably arranged on the mounting plate 5, a light source 17 is fixedly connected to the rotating shaft 16, a transparent glass sheet 18 is fixedly connected to the light source 17, and an opaque material is used for drawing a visual target on the glass sheet 18.

In this application, the target is "E", and the light source 17 is activated, and the light source 17 transmits a line through the glass sheet 18 to the screen 4, and due to the presence of the target "E", a projection of the target "E" will appear on the screen 4 for visual acuity detection.

3 bottoms of casing are provided with internal thread pipe 2, threaded stud 1 in the internal thread pipe 2, 1 bottom installation base of stud, fix casing 3, when the patient carries out visual acuity test, through stud 1 and the cooperation of internal thread pipe 2, highly adjust casing 3, so that curtain 4 on the casing 3 is in same level with patient's eyeball, its aim at prevents that eyeball and sighting mark are not in same horizontal plane and the fixed vision obstacle that produces, if the eyeball is in the skew state when visual acuity test, will lead to the change of the light route between pupil center and the retina, just also can lead to the change in the visual acuity test, thereby influence measuring result's accuracy.

In the process of vision detection, the direction of the visual target E can be changed only by driving the rotating shaft 16 to rotate, and a patient only needs to recognize the direction of the visual target without deflecting the pupil, so that the detection error is reduced, and the accuracy of the measurement result is improved.

Example 2

Further, as shown in fig. 2 to 12, a rotating structure is disposed on the mounting plate 5 to drive the rotating shaft 16 to rotate, the rotating structure includes a motor frame 6 and a motor 7, the motor frame 6 is fixedly connected to the mounting plate 5, the motor 7 is fixedly connected to the motor frame 6, a first incomplete friction wheel 8 is fixedly connected to an output end of the motor 7, a short shaft 11 is rotatably mounted on the mounting plate 5, a first friction wheel 12 is fixedly connected to one end of the short shaft 11, a gear 14 is fixedly connected to the other end of the short shaft, the first incomplete friction wheel 8 is matched with the first friction wheel 12, a ring gear 22 is rotatably mounted on the mounting plate 5, the ring gear 22 is matched with the gear 14, an arc-shaped driving block 24 is fixedly connected to the ring gear 22, a sliding rod 23 is fixedly connected to the ring gear 22, a baffle plate 19 is fixedly connected to the rotating shaft 16, arc-shaped grooves 21 are equidistantly disposed on the baffle plate 19, the driving block 24 is matched with the grooves 21, a plurality of notches 20 are disposed on the baffle plate 19, and the sliding rod 23 is matched with the notches 20.

The motor 7 is started, the motor 7 drives the first incomplete friction wheel 8 to rotate, the first incomplete friction wheel 8 drives the first friction wheel 12 to rotate when being in contact with the first friction wheel 12, the first friction wheel 12 drives the stub shaft 11 to rotate, the stub shaft 11 rotates to drive the gear 14 to rotate, the gear 14 rotates to drive the ring gear 22 to rotate, the ring gear 22 rotates to drive the driving block 24 and the sliding rod 23 to rotate, and the driving block 24 and the sliding rod 23 rotate to drive the baffle 19 to rotate by a fixed angle.

The fixed angle of rotation of the flap 19 in this embodiment is selected to be 90 degrees, thereby driving the shaft 16 to rotate 90 degrees each time to redirect the sighting target.

Example 3

Further, as shown in fig. 3-6, a light intensity adjusting mechanism is arranged on the mounting plate 5 to adjust the light intensity projected on the curtain 4, the light intensity adjusting mechanism includes a connecting shaft 10 and a transparent plate 15, the connecting shaft 10 is rotatably mounted on the mounting plate 5, the transmittance of the transparent plate 15 is gradually reduced, the transparent plate 15 is fixedly connected to the connecting shaft 10, a second friction wheel 9 is fixedly connected to the connecting shaft 10, the second friction wheel 9 is matched with the first incomplete friction wheel 8, a third friction wheel 13 is rotatably mounted on the mounting plate 5, the third friction wheel 13 is matched with the second friction wheel 9, and the third friction wheel 13 is matched with the first incomplete friction wheel 8.

When the first incomplete friction wheel 8 rotates, the first incomplete friction wheel 8 intermittently drives the second friction wheel 9 and the third friction wheel 13 to rotate, wherein:

the first incomplete friction wheel 8 is in contact with the second friction wheel 9, and the first incomplete friction wheel 8 drives the second friction wheel 9 to rotate by a preset angle;

the first incomplete friction wheel 8 is in contact with the third friction wheel 13, the first incomplete friction wheel 8 drives the third friction wheel 13 to rotate, and the third friction wheel 13 drives the second friction wheel 9 to reversely rotate by a preset angle.

Based on the cooperation of the first incomplete friction wheel 8, the second friction wheel 9 and the third friction wheel 13, the second friction wheel 9 intermittently rotates forward and backward by a preset angle.

The second friction wheel 9 drives the connecting shaft 10 to synchronously rotate, and the connecting shaft 10 drives the light transmission plate 15 to synchronously rotate, namely the light transmission plate 15 intermittently rotates forward and backward for a preset angle.

As shown in fig. 13, the light transmittance of the light-transmitting plate 15 is not uniform, and gradually decreases from the position a to the position B, and the position a is completely transparent, and the position B can completely block light, and when the light-transmitting plate 15 rotates, the light-transmitting plate 15 can change the brightness intensity of the light source 17 projected on the curtain 4, if:

in the state shown in fig. 13, light irradiates the curtain 4 through the position a, the light-transmitting plate 15 rotates clockwise, the position B rotates gradually to the position a, the luminance brightness of the curtain 4 is also reduced, when the light-transmitting plate 15 rotates by a preset angle, the position B is located at the position a, and the curtain 4 is completely dark at this time; on the contrary, the light-transmitting plate 15 rotates counterclockwise, and the transmittance of the light-transmitting plate 15 also increases gradually during the rotation until the light-transmitting plate 15 is restored.

The purpose of this embodiment is to improve visual detection's accuracy, in this application, sighting target "E" need rotate when the redirecting, if the patient stares sighting target "E" always, sighting target "E" can form dynamic formation of image in the eyeball at the rotation in-process, receive individual dynamic vision influence, can lead to patient's pupil to take place corresponding change, can influence subsequent visual detection, for the shadow of reducing dynamic vision, this embodiment shelters from sighting target "E" through light-passing board 15, before sighting target "E" rotates, shelter from the projection completely through the B department of light-passing board 15, after sighting target "E" rotates, make the projection pass through from the A department that is completely transparent, reduce the influence of dynamic vision to static visual detection.

In addition, in order to reduce the stimulation of sudden darkness or sudden brightness to the pupils of the patient, the transparency of the transparent plate 15 is changed step by step, so that the eyeballs of the patient can gradually adapt to different brightness in the process of the patient, the stimulation of light to the pupils is reduced, and the accuracy of vision detection is improved.

Example 4

Further, be equipped with the sighting mark size in casing 3 and adjust the structure in order to adjust the sighting mark projection area on curtain 4, the sighting mark size is adjusted the structure and is included reciprocal screw rod 27, nut seat 28 and convex lens 29, reciprocal screw rod 27 is rotatable to be installed on mounting panel 5, the rigid coupling has fourth friction pulley 26 on reciprocal screw rod 27, the rigid coupling has incomplete second friction pulley 25 on the pivot 16, incomplete second friction pulley 25 and fourth friction pulley 26 phase-match, nut seat 28 spiro union is on reciprocal screw rod 27, convex lens 29 rigid coupling is on nut seat 28, the light that light source 17 launched all passes through convex lens 29.

When the rotating shaft 16 rotates, the second incomplete friction wheel 25 is driven to rotate, when the second incomplete friction wheel 25 rotates, the fourth incomplete friction wheel 26 is driven to rotate intermittently, the fourth friction wheel 26 drives the reciprocating screw 27 to rotate, the reciprocating screw 27 rotates to drive the nut seat 28 to move axially, and therefore the nut seat 28 drives the convex lens 29 to translate between the curtain 4 and the sighting mark, so that the projection size of the sighting mark on the curtain is changed.

The working principle is as follows:

The fixed angle of baffle 19 pivoted in this embodiment selects for 90 degrees to drive pivot 16 and rotate 90 degrees at every turn, baffle 19 drives pivot 16 and rotates, and pivot 16 rotates, can change sighting mark "E" direction, the patient only need identify the sighting mark direction can, need not to deflect the pupil, reduce detection error, improve measuring result's accuracy.

in the state shown in fig. 13, light irradiates the curtain 4 through the position a, the light-transmitting plate 15 rotates clockwise, the position B rotates gradually to the position a, the luminance brightness of the curtain 4 is also reduced, when the light-transmitting plate 15 rotates by a preset angle, the position B is located at the position a, and the curtain 4 is completely dark at this time; conversely, the light-transmitting plate 15 rotates counterclockwise, and the transmittance of the light-transmitting plate 15 gradually increases during the rotation until the light-transmitting plate 15 is restored.

In addition, for reducing the stimulation that suddenly darkness or suddenly brightness caused to patient's pupil, what the transparency on light-passing board 15 adopted is the mode that changes step by step, thereby the patient is making patient's eyeball have a in-process that adapts gradually when facing different luminance, reduces the stimulation of light to the pupil, improves visual acuity detection's accuracy.

The second incomplete friction wheel 25 is driven to rotate when the rotating shaft 16 rotates, the second incomplete friction wheel 25 intermittently drives the fourth friction wheel 26 to rotate when rotating, the fourth friction wheel 26 drives the reciprocating screw 27 to rotate, the reciprocating screw 27 drives the nut seat 28 to axially move in a rotating manner, so that the nut seat 28 drives the convex lens 29 to translate between the curtain 4 and the sighting mark, the projection size of the sighting mark on the curtain is changed, and the vision of a patient is detected.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a visual acuity detection assistor, its characterized in that, includes casing (3), be equipped with on casing (3) and receive projected curtain (4), casing (3) inside is equipped with mounting panel (5), rotatable installation is gone up in mounting panel (5) has pivot (16), the rigid coupling has light source (17) in pivot (16), the rigid coupling has transparent glass piece (18) on light source (17) use opaque material to draw the sighting mark on glass piece (18).

2. The vision testing aid of claim 1, wherein the mounting plate (5) is provided with a rotating structure to drive the rotating shaft (16) to rotate.

3. The vision testing aid of claim 2, wherein said rotating structure comprises a motor frame (6) and a motor (7), the motor frame (6) is fixedly connected on the mounting plate (5), the motor (7) is fixedly connected on the motor frame (6), a first incomplete friction wheel (8) is fixedly connected on the output end of the motor (7), a short shaft (11) is rotatably arranged on the mounting plate (5), one end of the short shaft (11) is fixedly connected with a first friction wheel (12), the other end is fixedly connected with a gear (14), the first incomplete friction wheel (8) is matched with the first friction wheel (12), a ring gear (22) is rotatably arranged on the mounting plate (5), the ring gear (22) is matched with the gear (14), an arc-shaped driving block (24) is fixedly connected to the ring gear (22), a sliding rod (23) is fixedly connected to the ring gear (22), a baffle (19) is fixedly connected to the rotating shaft (16), arc-shaped grooves (21) are arranged on the baffle plate (19) at equal intervals, the driving block (24) is matched with the groove (21), the baffle (19) is provided with a plurality of notches (20), and the sliding rod (23) is matched with the notches (20).

4. A visual acuity testing aid as claimed in claim 3, characterised in that the mounting plate (5) is provided with a light intensity adjustment mechanism to adjust the intensity of light projected onto the screen (4).

5. The visual detection assistor of claim 4, characterized in that, light intensity adjustment mechanism includes connecting axle (10) and light-passing board (15), rotatable the installing of connecting axle (10) is in on mounting panel (5), the transmittance of light-passing board (15) reduces gradually, light-passing board (15) rigid coupling is in on connecting axle (10), the rigid coupling has second friction pulley (9) on connecting axle (10), second friction pulley (9) with first incomplete friction pulley (8) phase-match, rotatable third friction pulley (13) of installing on mounting panel (5), third friction pulley (13) with second friction pulley (9) phase-match, third friction pulley (13) with first incomplete friction pulley (8) phase-match.

6. A visual acuity testing aid as claimed in any one of claims 2 to 5, characterised in that a visual target size adjustment arrangement is provided within the housing (3) to adjust the area of projection of the visual target onto the curtain (4).

7. The visual acuity detection assisting device according to claim 6, wherein the visual target size adjusting structure comprises a reciprocating screw rod (27), a nut seat (28) and a convex lens (29), the reciprocating screw rod (27) is rotatably mounted on the mounting plate (5), a fourth friction wheel (26) is fixedly connected to the reciprocating screw rod (27), a second incomplete friction wheel (25) is fixedly connected to the rotating shaft (16), the second incomplete friction wheel (25) is matched with the fourth friction wheel (26), the nut seat (28) is screwed on the reciprocating screw rod (27), the convex lens (29) is fixedly connected to the nut seat (28), and light emitted by the light source (17) passes through the convex lens (29).