阅读说明：本技术 一种眼科用定位测量装置 (Positioning and measuring device for ophthalmology department ) 是由 曹科 任飞 于 2020-12-05 设计创作，主要内容包括：本发明公开了一种眼科用定位测量装置,涉及眼科定位视力检测技术领域；为了解决不同身高的测量者检测实力的问题；具体包括幕墙,所述幕墙一侧外壁通过螺钉固定连接有承载杆；承载杆一侧内壁加工有通槽；通槽一侧内壁滑动连接有电子视力表；幕墙底端外壁通过螺钉固定连接有保护壳；保护壳底端内壁通过螺栓连接有电动推杆；电动推杆的输出轴一侧外壁通过螺钉固定连接有承载板；承载板顶端外壁通过螺钉固定连接有推送杆；推送杆顶端外壁通过螺钉固定连接于电子视力表底端外壁。本发明通过设置红外线接收器、电动推杆、红外线发射器,保证了视力检测时视力表的1.0行和测量者的眼睛位于同一高度,提高了检测的精准性。(The invention discloses a positioning and measuring device for ophthalmology, and relates to the technical field of ophthalmology positioning vision detection; the problem of detecting the strength of measurers with different heights is solved; the curtain wall comprises a curtain wall body, wherein a bearing rod is fixedly connected to the outer wall of one side of the curtain wall body through a screw; a through groove is processed on the inner wall of one side of the bearing rod; an electronic visual chart is connected to the inner wall of one side of the through groove in a sliding manner; the outer wall of the bottom end of the curtain wall is fixedly connected with a protective shell through a screw; the inner wall of the bottom end of the protective shell is connected with an electric push rod through a bolt; the outer wall of one side of the output shaft of the electric push rod is fixedly connected with a bearing plate through a screw; the outer wall of the top end of the bearing plate is fixedly connected with a pushing rod through a screw; the outer wall of the top end of the push rod is fixedly connected to the outer wall of the bottom end of the electronic visual chart through screws. According to the visual acuity test chart, the infrared receiver, the electric push rod and the infrared emitter are arranged, so that the 1.0 line of the visual acuity test chart and the eyes of a measurer are located at the same height during visual acuity test, and the detection accuracy is improved.)

1. An ophthalmological positioning and measuring device comprises a curtain wall (1), and is characterized in that the outer wall of one side of the curtain wall (1) is fixedly connected with a bearing rod (2) through a screw; a through groove (9) is processed on the inner wall of one side of the bearing rod (2); an electronic visual chart (12) is connected to the inner wall of one side of the through groove (9) in a sliding manner; the outer wall of the bottom end of the curtain wall (1) is fixedly connected with a protective shell (8) through a screw; the inner wall of the bottom end of the protective shell (8) is connected with an electric push rod (13) through a bolt; the outer wall of one side of the output shaft of the electric push rod (13) is fixedly connected with a bearing plate (14) through a screw; the outer wall of the top end of the bearing plate (14) is fixedly connected with a pushing rod (15) through a screw; the outer wall of the top end of the push rod (15) is fixedly connected to the outer wall of the bottom end of the electronic visual chart (12) through a screw; the outer wall of one side of the pushing rod (15) is fixedly connected with a supporting connecting rod (10) through a screw; the outer wall of one side of the support connecting rod (10) is fixedly connected with an infrared receiver (11) through a screw; the outer wall of the bottom end of the curtain wall (1) is fixedly connected with supporting legs (3) through screws; the outer wall of one side of the protective shell (8) is provided with evenly distributed bottom plate sliding chutes (4); the inner wall of one side of the bottom plate sliding chute (4) is connected with a sliding trolley (7) in a sliding way; the outer wall of the top end of the sliding trolley (7) is fixedly connected with a connecting base (6) through a screw; an electric telescopic rod (32) is connected to the inner wall of one side of the connecting base (6) in a sliding manner; the outer wall of one side of the electric telescopic rod (32) is fixedly connected with a fixed cross rod (24) through a screw; the outer wall of one side of the fixed cross bar (24) is fixedly connected with an infrared emitter (25) through a screw; the outer wall of the top end of the electric telescopic rod (32) is fixedly connected with a connecting block (31) through a screw; the inner wall of the top end of the connecting block (31) is rotatably connected with a rotating connecting rod (29); the outer wall of the top end of the rotating connecting rod (29) is fixedly connected with a mounting plate (26) through a screw; the outer wall of the top end of the mounting plate (26) is fixedly connected with a blinder (5) through screws; a control unit is arranged in the curtain wall (1); the infrared receiver (11), the electronic visual chart (12), the electric push rod (13) and the electric telescopic rod (32) are electrically connected with the internal control unit.

2. An ophthalmic positioning measuring device according to claim 1, characterized in that said infrared receiver (11) comprises a lower receiving zone (16), a positioning receiving zone (17), an upper receiving zone (18); the outer wall of one side of the positioning receiving area (17) is fixedly connected with the outer wall of one side of the support connecting rod (10) through a screw; the upper end receiving area (18) is positioned above the positioning receiving area (17); the lower end receiving area (16) is located below the positioning receiving area (17).

3. An ophthalmologic positioning and measuring device according to claim 2, characterized in that a fixing threaded rod (30) is rotatably connected to the inner wall of the connecting piece (31).

4. An ophthalmologic positioning and measuring device according to claim 3, characterized in that the outer side walls of the eye mask (5) on both sides are provided with sponge cushions (28).

5. An ophthalmologic positioning and measuring apparatus according to claim 4, characterized in that the pressure sensor (27) is fixedly connected to the inner wall of the eye mask (5) on both sides by means of screws; the pressure sensor (27) is electrically connected with the internal control unit.

6. An ophthalmologic positioning and measuring apparatus according to claim 5, characterized in that a slide groove (19) is formed in the inner wall of the base plate slide groove (4); a limiting hole (20) is processed on the inner wall of one side of the sliding groove (19).

7. An ophthalmological positioning and measuring device according to claim 6, characterized in that a telescopic column (36) is fixedly connected to the inner wall of one side of the sliding carriage (7) by means of screws; the outer wall of the periphery of the telescopic column (36) is provided with a connecting spring (37); the outer wall of one side of the telescopic column (36) is fixedly connected with a fixed connecting rod (33) through a screw.

8. An ophthalmological positioning and measuring device according to claim 7, characterized in that the peripheral outer wall of the fixed link (33) is connected in a sliding manner to the inner wall of the slide carriage (7); the outer wall of one side of the fixed connecting rod (33) is fixedly connected with a fixed plate (21) through a screw; the outer wall of one side of the fixed plate (21) is fixedly connected with an electromagnetic block (22) through a screw; the outer wall of one side of the connecting base (6) is fixedly connected with a connecting magnetic block (23) through a screw; the electromagnetic block (22) and the connecting magnetic block (23) are positioned on the same horizontal plane; the electromagnetic block (22) is electrically connected with the internal control unit.

9. An ophthalmologic positioning and measuring apparatus according to claim 8, characterized in that the outer walls of the two sides of the fixed link (33) are connected with limit plates (35) by hinges; the outer wall of one side of the limit plate (35) is fixedly connected with a limit rod (34) through a screw; the inner walls of the two sides of the sliding trolley (7) are fixedly connected with a blocking rod (38) through screws.

Technical Field

The invention relates to the technical field of ophthalmologic positioning vision measurement, in particular to an ophthalmologic positioning measurement device.

Background

In present society, electronic product kind is more and more various, many teenagers can lead to the eyesight impaired because of using electronic product for a long time, need carry out visual detection to it between wearing glasses, at present, among the prior art, visual detection is only a vision board, let the inspector stand and carry out visual detection at the position of five meters apart from the pick-up plate, but because inspector's height is different, for more accurate acquisition test data, the height of the regulation vision board that need not stop, waste time, reduce detection efficiency, therefore, need a position measuring device for ophthalmology urgent need.

Through the retrieval, chinese patent application number is CN 201921926696.5's patent, discloses an ophthalmic location measurement device, the on-line screen storage device comprises a base, the bottom fixedly connected with universal wheel body of base, the first solid fixed cylinder of top fixedly connected with of base, the inner wall swing joint of first solid fixed cylinder has the bracing piece, the outer wall swing joint of first solid fixed cylinder has fixing bolt, the outer wall of bracing piece has the solid fixed cylinder of second through fixing bolt swing joint, the top fixedly connected with visual chart shell of the solid fixed cylinder of second, one side fixedly connected with fixed ear of visual chart shell. The ophthalmic location measuring device in the above-mentioned patent just conveniently adjusts the height of eyesight board, and can't make 1.0 line of eyesight board and surveyor's eyes be located same height for the testing result is not accurate.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an ophthalmologic positioning and measuring device.

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

an ophthalmic positioning and measuring device comprises a curtain wall; the outer wall of one side of the curtain wall is fixedly connected with a bearing rod through a screw; a through groove is processed on the inner wall of one side of the bearing rod; an electronic visual chart is connected to the inner wall of one side of the through groove in a sliding manner; the outer wall of the bottom end of the curtain wall is fixedly connected with a protective shell through a screw; the inner wall of the bottom end of the protective shell is connected with an electric push rod through a bolt; the outer wall of one side of the output shaft of the electric push rod is fixedly connected with a bearing plate through a screw; the outer wall of the top end of the bearing plate is fixedly connected with a pushing rod through a screw; the outer wall of the top end of the push rod is fixedly connected to the outer wall of the bottom end of the electronic visual chart through a screw; the outer wall of one side of the pushing rod is fixedly connected with a supporting connecting rod through a screw; the outer wall of one side of the support connecting rod is fixedly connected with an infrared receiver through a screw; the outer wall of the bottom end of the curtain wall is fixedly connected with supporting legs through screws; bottom plate sliding chutes which are uniformly distributed are arranged on the outer wall of one side of the protective shell; the inner wall of one side of the bottom plate sliding chute is connected with a sliding trolley in a sliding way; the outer wall of the top end of the sliding trolley is fixedly connected with a connecting base through a screw; an electric telescopic rod is connected to the inner wall of one side of the connecting base in a sliding manner; the outer wall of one side of the electric telescopic rod is fixedly connected with a fixed cross rod through a screw; the outer wall of one side of the fixed cross rod is fixedly connected with an infrared emitter through a screw; the outer wall of the top end of the electric telescopic rod is fixedly connected with a connecting block through a screw; the inner wall of the top end of the connecting block is rotatably connected with a rotating connecting rod; the outer wall of the top end of the rotating connecting rod is fixedly connected with a mounting plate through a screw; the outer wall of the top end of the mounting plate is fixedly connected with an eye cover through a screw; a control unit is arranged in the curtain wall; the infrared receiver, the electronic visual chart, the electric push rod and the electric telescopic rod are all electrically connected with the internal control unit.

Preferably: the infrared receiver comprises a lower end receiving area, a positioning receiving area and an upper end receiving area; the outer wall of one side of the positioning receiving area is fixedly connected with the outer wall of one side of the supporting connecting rod through a screw; the upper end receiving area is positioned above the positioning receiving area; the lower end receiving area is positioned below the positioning receiving area.

Preferably: the inner wall of one side of the connecting block is rotatably connected with a fixed threaded rod.

Preferably: sponge round pads are arranged on the outer walls of the two sides of the eyeshade.

Preferably: the inner walls of the two sides of the eye cover are fixedly connected with pressure sensors through screws; the pressure sensor is electrically connected with the internal control unit.

Preferably: a sliding groove is processed on the inner wall of one side of the sliding groove of the bottom plate; the inner wall of one side of the sliding groove is provided with a limiting hole.

Preferably: the inner wall of one side of the sliding trolley is fixedly connected with a telescopic column through a screw; the outer wall around the telescopic column is provided with a connecting spring; the outer wall of one side of the telescopic column is fixedly connected with a fixed connecting rod through a screw.

Preferably: the peripheral outer walls of the fixed connecting rods are connected with the inner wall of one side of the sliding trolley in a sliding manner; the outer wall of one side of the fixed connecting rod is fixedly connected with a fixed plate through a screw; the outer wall of one side of the fixing plate is fixedly connected with an electromagnetic block through a screw; the outer wall of one side of the connecting base is fixedly connected with a connecting magnetic block through a screw; the electromagnetic block and the connecting magnetic block are positioned on the same horizontal plane; the electromagnetic block is electrically connected with the internal control unit.

Preferably: the outer walls of the two sides of the fixed connecting rod are connected with limiting plates through hinges; the outer wall of one side of the limiting plate is fixedly connected with a limiting rod through a screw; the inner walls of the two sides of the sliding trolley are fixedly connected with blocking rods through screws.

The invention has the beneficial effects that:

1. by arranging the infrared receiver, the electric push rod, the fixed cross rod, the infrared emitter, the push rod and the bearing plate, when a measurer measures, the electric telescopic rod is used for adjusting the connecting block, the rotating connecting rod and the height of the mounting plate so as to adjust the height of the eye covering patch, and the eye covering patch can be adjusted to cover one eye, in the adjusting process, the fixed cross rod fixed on the electric telescopic rod drives the infrared emitter to move along with the fixed cross rod, at the moment, the infrared receiver corresponding to the infrared emitter detects the change of the infrared emitter, a signal is sent out to adjust the bearing plate through the electric push rod in the protective shell, and the height of the push rod achieves the purpose of adjusting the height of the electronic visual chart until the infrared receiver continuously receives infrared rays sent out by the infrared emitter, at the moment, the centers of the eye covering patch and the electronic visual chart are positioned at the same horizontal line, and the 1., the detection accuracy is improved.

2. Through setting up connection base, carrier bar, leading to groove, electron visual acuity chart and electric telescopic handle, the height that measuring device was adjusted according to different examiner's height to the convenience improves the flexibility of device, shows different visual acuity charts through the electron visual acuity chart, prevents that someone from changing the eyesight level of self with the eyesight table back of the body, the fairness of guaranteeing to detect by relying on memory in eyesight detection.

3. Through set up the lower extreme receiving area in infrared receiver, location receiving area and upper end receiving area, in the beginning, the infrared ray that infrared emitter sent is received to location receiving area on the infrared receiver, electric putter does not operate, when infrared emitter removes, infrared irradiation is on the upper end receiving area, electric putter operation promotion loading board this moment, the push rod rebound, until the infrared ray that infrared emitter sent is received by the location receiving area, on the contrary, when the infrared ray was received to the lower extreme receiving area, electric putter moves down the loading board, the push rod, ensure that 1.0 row in the visual chart that electronic visual chart shows is on same horizontal plane with the eyes of detector.

4. Through setting up the eye-shade, pressure sensor and sponge circle pad, guarantee all to be guaranteed when measuring binocular vision, the sponge circle pad can prevent that the eye-shade from oppressing the eyeball, causes the damage to the eye, and pressure sensor then prevents that the measurer from not covering another eye according to the regulation, detects the pressure that the sponge circle pad received through pressure sensor, and visual detection just calculates normally when pressure is qualified, ensures the fairness that detects.

5. By arranging the electromagnetic block, the limiting plate, the limiting hole, the limiting rod, the connecting magnetic block, the telescopic column, the connecting spring and the blocking rod, when a measurer stands at five meters of the electronic visual chart and cannot see the electronic visual chart clearly, the electromagnetic block is operated to enable the electromagnetic block and the connecting magnetic block to be mutually adsorbed, the fixed connecting rod is pushed inwards by the fixed plate, the telescopic column and the connecting spring are contracted, the blocking rod blocks the limiting plate to rotate around the fixed connecting rod when the limiting plate moves, so that the fixing between the limiting rod and the limiting hole is released, the sliding trolley can be pushed, the pushing device of the measurer moves forwards until 1.0 line in the visual chart on the electronic visual chart is seen clearly, the staff can measure and calculate the vision of the measurer through the moving distance of the measurer, the electromagnetic block can be stopped to operate at the moment, and the fixed connecting rod pushes the fixed plate outwards under the action of the telescopic column and the connecting spring, at the moment, the limiting plate is reset, the limiting rod continues to form a fixed relation with the limiting hole to fix the sliding trolley, and the flexibility of the device is improved.

Drawings

FIG. 1 is a schematic view of a subjective structure of an ophthalmic positioning and measuring device according to the present invention;

FIG. 2 is a schematic view of a curtain wall structure of an ophthalmic positioning and measuring device according to the present invention;

FIG. 3 is a schematic diagram of a bottom plate chute structure of an ophthalmological positioning and measuring apparatus according to the present invention;

FIG. 4 is a schematic view of a connection base of an ophthalmic positioning and measuring device according to the present invention;

FIG. 5 is a schematic view of the internal configuration of a trolley of the ophthalmic positioning and measuring device of the present invention;

fig. 6 is a schematic circuit flow diagram of an ophthalmological positioning and measuring apparatus according to the present invention.

In the figure: 1 curtain wall, 2 bearing rods, 3 supporting feet, 4 bottom plate sliding grooves, 5 eye masks, 6 connecting bases, 7 sliding trolleys, 8 protective shells, 9 through grooves, 10 supporting connecting rods, 11 infrared receivers, 12 electronic visual charts, 13 electric push rods, 14 bearing plates, 15 pushing rods, 16 lower end receiving areas, 17 positioning receiving areas, 18 upper end receiving areas, 19 sliding grooves, 20 limiting holes, 21 fixing plates, 22 electromagnetic blocks, 23 connecting magnetic blocks, 24 fixing cross rods, 25 infrared transmitters, 26 mounting plates, 27 pressure sensors, 28 sponge round pads, 29 rotating connecting rods, 30 fixing threaded rods, 31 connecting blocks, 32 electric telescopic rods, 33 fixing connecting rods, 34 limiting rods, 35 limiting plates, 36 telescopic columns, 37 connecting springs and 38 blocking rods.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

An ophthalmological positioning and measuring device, as shown in fig. 1, 2, 4 and 6, comprises a curtain wall 1; the outer wall of one side of the curtain wall 1 is fixedly connected with a bearing rod 2 through a screw; a through groove 9 is processed on the inner wall of one side of the bearing rod 2; an electronic visual chart 12 is connected to the inner wall of one side of the through groove 9 in a sliding manner; the outer wall of the bottom end of the curtain wall 1 is fixedly connected with a protective shell 8 through a screw; the inner wall of the bottom end of the protective shell 8 is connected with an electric push rod 13 through a bolt; the outer wall of one side of the output shaft of the electric push rod 13 is fixedly connected with a bearing plate 14 through a screw; the outer wall of the top end of the bearing plate 14 is fixedly connected with a pushing rod 15 through a screw; the outer wall of the top end of the push rod 15 is fixedly connected to the outer wall of the bottom end of the electronic visual chart 12 through screws; the outer wall of one side of the pushing rod 15 is fixedly connected with a supporting connecting rod 10 through a screw; the outer wall of one side of the support connecting rod 10 is fixedly connected with an infrared receiver 11 through a screw; the outer wall of the bottom end of the curtain wall 1 is fixedly connected with supporting legs 3 through screws; the outer wall of one side of the protective shell 8 is provided with evenly distributed bottom plate chutes 4; the inner wall of one side of the bottom plate chute 4 is connected with a sliding trolley 7 in a sliding way; the outer wall of the top end of the sliding trolley 7 is fixedly connected with a connecting base 6 through a screw; an electric telescopic rod 32 is connected to the inner wall of one side of the connecting base 6 in a sliding manner; the outer wall of one side of the electric telescopic rod 32 is fixedly connected with a fixed cross rod 24 through a screw; the outer wall of one side of the fixed cross bar 24 is fixedly connected with an infrared emitter 25 through a screw; the outer wall of the top end of the electric telescopic rod 32 is fixedly connected with a connecting block 31 through a screw; the inner wall of the top end of the connecting block 31 is rotatably connected with a rotating connecting rod 29; the outer wall of the top end of the rotating connecting rod 29 is fixedly connected with a mounting plate 26 through a screw; the outer wall of the top end of the mounting plate 26 is fixedly connected with an eye mask 5 through screws; a control unit is arranged in the curtain wall 1; the infrared receiver 11, the electronic visual chart 12, the electric push rod 13 and the electric telescopic rod 32 are electrically connected with the internal control unit; when a measurer measures, the electric telescopic rod 32 is used for adjusting the heights of the connecting block 31, the rotating connecting rod 29 and the mounting plate 26 so as to adjust the height of the eye mask 5, and the eye mask can be adjusted to cover one eye, in the adjusting process, the fixed cross rod 24 fixed on the electric telescopic rod 32 drives the infrared emitter 25 to move along with the fixed cross rod 24, at the moment, the infrared receiver 11 corresponding to the infrared emitter 25 detects the change of the infrared emitter 25, sends a signal to adjust the heights of the bearing plate 14 and the push rod 15 through the electric push rod 13 in the protective shell 8 to achieve the purpose of adjusting the height of the electronic visual chart 12 until the infrared receiver 11 continuously receives infrared rays emitted by the infrared emitter 25, at the moment, the centers of the eye mask 5 and the electronic visual chart 12 are in the same horizontal line, and the 1.0 line of the visual chart and the eyes of the measurer are positioned at, improved the accurate nature of detection, through connection base 6, carrier bar 2, the logical groove 9 that sets up, the height of measuring device is adjusted according to different examiner's height to the convenience, improves the flexibility of device, shows different visual charts through electron visual chart 12, prevents that someone from changing the visual acuity level of self with the visual chart back of the body, relies on the memory in visual inspection, guarantees the fairness that detects.

In order to ensure that the electronic eye chart 12 presents the 1.0 row of the eye chart on the same horizontal plane as the examiner's eyes; as shown in fig. 2, the infrared receiver 11 includes a lower receiving area 16, a positioning receiving area 17, and an upper receiving area 18; the outer wall of one side of the positioning receiving area 17 is fixedly connected to the outer wall of one side of the support connecting rod 10 through a screw; the upper end receiving area 18 is located above the positioning receiving area 17; the lower end receiving area 16 is located below the positioning receiving area 17; initially, the positioning receiving area 17 on the infrared receiver 11 receives the infrared rays emitted by the infrared emitter 25, the electric push rod 13 does not operate, when the infrared emitter 25 moves, the infrared rays irradiate on the upper receiving area 18, at this time, the electric push rod 13 operates to push the bearing plate 14 and the push rod 15 to move upwards until the infrared rays emitted by the infrared emitter 25 are received by the positioning receiving area 17, otherwise, when the lower receiving area 16 receives the infrared rays, the electric push rod 13 moves the bearing plate 14 and the push rod 15 downwards, and it is ensured that the 1.0 row in the visual chart displayed by the electronic visual chart 12 and the eyes of the examiner are on the same horizontal plane.

The vision level of the two eyes of the measurer is conveniently detected; as shown in fig. 4, a fixed threaded rod 30 is rotatably connected to the inner wall of one side of the connecting block 31; after a measurer finishes measuring one eye, the fixed state of the rotary connecting rod 29 is released by rotating the fixed threaded rod 30, then the rotary connecting rod 29 is rotated for half a turn to reach the position of one eye, the mounting plate 26 is fixed through the fixed threaded rod 30, then the other eye begins to be measured, the vision level of the two eyes of the measurer is conveniently detected, and the practicability of the device is improved.

In order to ensure that when one eye is used for measuring the vision, the other eye is shielded and does not press the eyeball; as shown in fig. 4, sponge round pads 28 are arranged on the outer walls of the two sides of the eye cover 5; the inner walls of the two sides of the eye cover 5 are fixedly connected with pressure sensors 27 through screws; the pressure sensor 27 is electrically connected with the internal control unit; through all setting up sponge circle pad 28, pressure sensor 27 in the eye-shade 5 both sides, guarantee all to be guaranteed when measuring binocular vision, sponge circle pad 28 can prevent that eye-shade 5 from oppressing the eyeball, causes the damage to the eye, pressure sensor 27 then prevents that the measurer from not covering another eye according to the regulation, detects the pressure that sponge circle pad 28 received through pressure sensor 27, and visual detection just calculates normally when pressure is qualified, ensures the fairness that detects.

In order to ensure that a detector with serious myopia can still perform accurate measurement, as shown in fig. 3, 4, 5 and 6, a sliding groove 19 is processed on the inner wall of one side of the bottom plate sliding groove 4; a limiting hole 20 is processed on the inner wall of one side of the sliding groove 19; the inner wall of one side of the sliding trolley 7 is fixedly connected with a telescopic column 36 through a screw; the outer wall of the periphery of the telescopic column 36 is provided with a connecting spring 37; the outer wall of one side of the telescopic column 36 is fixedly connected with a fixed connecting rod 33 through a screw; the peripheral outer wall of the fixed connecting rod 33 is connected with the inner wall of one side of the sliding trolley 7 in a sliding way; the outer wall of one side of the fixed connecting rod 33 is fixedly connected with a fixed plate 21 through a screw; the outer wall of one side of the fixing plate 21 is fixedly connected with an electromagnetic block 22 through a screw; the outer wall of one side of the connecting base 6 is fixedly connected with a connecting magnetic block 23 through a screw; the electromagnetic block 22 and the connecting magnetic block 23 are positioned on the same horizontal plane; the outer walls of the two sides of the fixed connecting rod 33 are connected with limit plates 35 through hinges; the outer wall of one side of the limiting plate 35 is fixedly connected with a limiting rod 34 through a screw; the inner walls of the two sides of the sliding trolley 7 are fixedly connected with blocking rods 38 through screws; the electromagnetic block 22 is electrically connected with the internal control unit; the sliding trolley 7 slides on the bottom plate sliding groove 4, the limit plate 35 moves in the sliding groove 19, a fixed relation is formed between the limit rod 34 and the limit hole 20 to fix the sliding trolley 7, when a measurer stands at five meters of the electronic visual chart 12 and cannot see the visual chart clearly, the electromagnetic block 22 is operated to enable the electromagnetic block 22 and the connecting magnetic block 23 to be adsorbed mutually, the fixed plate 21 pushes the fixed connecting rod 33 inwards to enable the telescopic column 36 and the connecting spring 37 to contract, the limit plate 35 is blocked by the blocking rod 38 to rotate around the fixed connecting rod 33 when moving, so that the fixing between the limit rod 34 and the limit hole 20 is released, the sliding trolley 7 can be pushed, the pushing device of the measurer moves forwards until 1.0 line in the visual chart on the electronic visual chart 12 is seen clearly, the worker can measure the vision of the measurer through the moving distance of the measurer, and can stop operating the electromagnetic block 22, under the action of the telescopic column 36 and the connecting spring 37, the fixed connecting rod 33 pushes the fixed plate 21 outwards, the limit plate 35 is reset at the moment, and the limit rod 34 continues to form a fixed relation with the limit hole 20 to fix the sliding trolley 7, so that the flexibility of the device is improved.

The working principle is as follows: when the electronic visual chart is used, power supplies of various electric equipment are turned on, when a measurer measures, the electric telescopic rod 32 is used for adjusting the heights of the connecting block 31, the rotating connecting rod 29 and the mounting plate 26 so as to adjust the height of the eye covering piece 5 and adjust the eye covering piece to one eye, in the adjusting process, the fixed cross rod 24 fixed on the electric telescopic rod 32 drives the infrared emitter 25 to move along with the fixed cross rod 24, at the moment, the infrared receiver 11 corresponding to the infrared emitter 25 detects the change of the infrared emitter 25, a signal is sent out to adjust the heights of the bearing plate 14 and the push rod 15 through the electric push rod 13 in the protective shell 8 so as to achieve the purpose of adjusting the height of the electronic visual chart 12 until the infrared receiver 11 continuously receives infrared rays sent out by the infrared emitter 25, at the moment, the centers of the eye covering piece 5 and the electronic visual chart 12 are positioned on the same horizontal line, and the condition that the, the detection accuracy is improved, the height of the measuring device can be conveniently adjusted according to the heights of different testers through the connecting base 6, the bearing rod 2 and the through groove 9, the flexibility of the device is improved, different visual charts are displayed through the electronic visual chart 12, the visual chart is prevented from being worn by a person, the visual level of the person is prevented from being changed by depending on memory in visual detection, the detection fairness is ensured, initially, the positioning receiving area 17 on the infrared receiver 11 receives infrared rays emitted by the infrared emitter 25, the electric push rod 13 does not run, when the infrared emitter 25 moves, the infrared rays irradiate the upper end receiving area 18, at the moment, the electric push rod 13 runs to push the bearing plate 14 and the push rod 15 to move upwards until the infrared rays emitted by the infrared emitter 25 are received by the positioning receiving area 17, otherwise, when the lower end receiving area 16 receives the infrared rays, the electric push rod 13 moves the bearing plate 14 and the push rod 15 downwards to ensure that 1.0 line in the visual chart displayed by the electronic visual chart 12 is on the same horizontal plane with eyes of a tester, after the tester finishes measuring one eye, the fixed state of the rotary connecting rod 29 is released by rotating the fixed threaded rod 30, then the rotary connecting rod 29 is rotated for half a circle to reach one eye, the mounting plate 26 is fixed by the fixed threaded rod 30, then the other eye is measured, the visual acuity level of the two eyes of the tester is conveniently detected, the practicability of the device is improved, the sponge round pads 28 and the pressure sensors 27 are arranged on both sides of the blinder 5 to ensure that the eyes can be guaranteed when the vision of the two eyes is measured, the sponge round pads 28 can prevent the blinder 5 from pressing eyeballs to damage the eyes, the pressure sensors 27 prevent the tester from not shielding the other eye according to the regulation, and the pressure sensors 27 detect the pressure applied to the sponge round pads 28, when the pressure is qualified, the vision test is normal, the detection fairness is ensured, the sliding trolley 7 slides on the bottom plate sliding groove 4, the limiting plate 35 moves in the sliding groove 19, the fixed relation is formed between the limiting rod 34 and the limiting hole 20 to fix the sliding trolley 7, when a measurer stands at five meters of the electronic visual chart 12 and cannot see the visual chart clearly, the electromagnetic block 22 is operated, the electromagnetic block 22 and the connecting magnetic block 23 are mutually adsorbed, the fixed plate 21 pushes the fixed connecting rod 33 inwards, the telescopic column 36 and the connecting spring 37 are contracted, the limiting plate 35 is stopped by the stopping rod 38 to rotate around the fixed connecting rod 33 when moving, the fixing between the limiting rod 34 and the limiting hole 20 is released, the sliding trolley 7 can be pushed, the pushing device of the measurer moves forwards until the visual chart on the electronic visual chart 12 is seen clearly by 1.0 line, and the worker can measure the vision of the measurer through the moving distance of the measurer, at this time, the electromagnetic block 22 can be stopped, the fixing connecting rod 33 pushes the fixing plate 21 outwards under the action of the telescopic column 36 and the connecting spring 37, the limiting plate 35 is reset at this time, and the limiting rod 34 continues to form a fixed relation with the limiting hole 20 to fix the sliding trolley 7, so that the flexibility of the device is improved.

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.