CN210330546U - Detection mechanism and eyesight screening device - Google Patents
Detection mechanism and eyesight screening device Download PDFInfo
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- CN210330546U CN210330546U CN201920548469.7U CN201920548469U CN210330546U CN 210330546 U CN210330546 U CN 210330546U CN 201920548469 U CN201920548469 U CN 201920548469U CN 210330546 U CN210330546 U CN 210330546U
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Abstract
The utility model relates to an eyesight screening device, which comprises a vertical frame, a detection mechanism, a position detection piece and a two-dimensional code identification piece; the detection mechanism comprises a substrate, a lifting assembly connected with the substrate, and a display assembly and an indication assembly which are arranged on the substrate; the display component comprises a fixed seat, a circuit board connected with the fixed seat, a backlight plate and a visual target; the indicating component comprises a connecting seat, a driving control board, a moving unit electrically connected with the driving control board and an indicating rod. The detection mechanism realizes the lifting control of the substrate through the lifting assembly, ensures the adjustment of the height of the display assembly, further enables the human eye detection angles to be consistent, and improves the accuracy of vision detection; through the automated control of mobile unit and drive control board to the pointer stick, make the visual detection in-process need not medical personnel to assist and detect, eliminate artificial operating error, improve and detect the accuracy, guarantee moreover and can independently accomplish visual detection, improve the practicality, more convenient popularization is not restricted by the detection place.
Description
Technical Field
The utility model relates to a vision test equipment field especially relates to a detection mechanism and vision examination device.
Background
With the high-speed development of society, a large number of radiant light emitting devices such as televisions, computers and the like are full of people, so that the number of people with eye problems increases year by year, and the healthy development of children and teenagers is seriously influenced, so that the radiant light emitting devices are particularly important for detecting eyesight.
The existing vision screening device for detecting the vision is characterized in that a lamp box with a visual chart is fixed on a wall surface, and the vision of people is detected through the lamp box with the visual chart; however, because the heights of each person are different, and the visual chart is fixed on the wall surface, the angles from which the people look at the visual chart are different, and the accuracy of visual detection is further influenced.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a detection mechanism and a vision screening device for the problem of poor accuracy of vision detection.
A detection mechanism, comprising:
a substrate;
the lifting assembly is connected with the substrate;
the display assembly is arranged on the substrate and comprises a fixed seat connected with the substrate, a circuit board connected with the fixed seat and a backlight board connected with the circuit board; and
the indicating assembly is arranged on the substrate and corresponds to the display assembly; the indicating assembly comprises a connecting seat, a driving control board connected with the connecting seat, a moving unit electrically connected with the driving control board and an indicating rod connected with the moving unit; the driving control board is electrically connected with the circuit board, and the moving unit is used for controlling the indicating rod to move relative to the display component.
The detection mechanism realizes the lifting control of the substrate by arranging the lifting component, realizes the adjustment of the height of the display component by installing the display component and the indicating component on the substrate, can realize the adjustment requirement of the detection mechanism on the height of the visual chart by installing the visual chart on the backlight plate, further ensures the consistency of human eye detection angles during visual detection and improves the accuracy of the visual detection; simultaneously through setting up mobile unit and drive control panel, realize the automated control to the instruction stick, make no longer need medical personnel to assist the detection at the in-process of visual acuity test, eliminate the error of manual operation, improve the accuracy of testing result, guarantee moreover to treat that visual acuity test personnel can independently accomplish visual acuity test, improve detection mechanism's practicality, more popularize not restricted by the detection place.
In one embodiment, the display assembly further comprises a visual target; the visual target is connected with the backlight plate.
In one embodiment, the circuit board, the backlight plate and the visual target are arranged in a parallel structure, the backlight plate is arranged between the circuit board and the visual target, and the circuit board, the backlight plate and the visual target are correspondingly embedded in the fixing seat.
In one embodiment, the moving unit comprises a driving rack connected with the connecting seat, a driving gear engaged with the driving rack, a driving member connected with the driving gear, a sliding seat connected with the driving member, a traveling member connected with the sliding seat, and a traveling gear connected with the traveling member; the traveling gear is correspondingly connected with the indicating rod.
In one embodiment, the indicating rod comprises a traveling part and an extending part connected with the traveling part; the traveling part is arranged in a long strip shape in an extending mode, the setting direction of the traveling part is different from that of the driving rack, one side, close to the traveling gear, of the traveling part is arranged in a sawtooth structure, and the traveling part is correspondingly meshed with the traveling gear.
In one embodiment, the advancing part is correspondingly arranged through the sliding seat, the indicating rod is arranged on the sliding seat in a sliding manner along the advancing part direction, and the sliding seat is arranged on the connecting seat in a sliding manner along the driving rack direction; the arrangement direction of the advancing part is perpendicular to the arrangement direction of the driving rack.
In one embodiment, the connecting seat is provided with a sliding rail; the slide rail correspondingly penetrates through the slide seat, and the arrangement direction of the slide rail is the same as that of the driving rack.
In one embodiment, the lift assembly comprises a lift rack coupled to the base plate, a lift gear engaged with the lift rack, and a lift member coupled to the lift gear; the lifting rack is arranged on one side of the substrate back to the display component.
A vision screening device comprising:
erecting a frame;
in the detection mechanism, the detection mechanism is mounted on the vertical frame, the substrate is slidably arranged on one side of the vertical frame, and the lifting assembly is respectively connected with the vertical frame and the substrate;
the position detection piece is arranged on the vertical frame and is arranged on one side of the vertical frame, which is provided with the display assembly; and
the two-dimensional code identification piece is used for scanning and identifying the mobile terminal.
According to the vision screening device, the two-dimensional code identification piece is arranged for scanning and identifying the mobile end, so that the mobile end and the vision screening device are connected, and the vision detection personnel are guaranteed to independently complete vision detection; through setting up the position detection spare, can correspond the distance that detects visual detection personnel apart from visual examination device, and then the adjustment is corresponded to the suggestion visual detection personnel, has guaranteed visual detection's accuracy.
In one embodiment, the stand is provided with a lifting groove; the lifting groove is in a long strip-shaped through groove structure, the substrate moves along the setting direction of the lifting groove, and the lifting assembly correspondingly penetrates through the lifting groove.
Drawings
Fig. 1 is a schematic structural view of a vision screening apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of another angle of the vision screening device of FIG. 1;
FIG. 3 is an exploded view of the detection mechanism of FIG. 1;
FIG. 4 is an exploded view of the display assembly;
fig. 5 is an exploded view of the indicating assembly.
The reference numbers in the drawings have the meanings given below:
100-a vision screening device;
10-a vertical frame, 11-a supporting leg and 15-a lifting groove;
20-a detection mechanism, 30-a substrate, 40-a lifting assembly, 41-a lifting rack, 42-a lifting gear, 43-a lifting piece, 50-a display assembly, 51-a fixed seat, 510-an embedding groove, 52-a circuit board, 53-a backlight plate, 54-a visual target piece, 60-an indication assembly, 61-a connecting seat, 615-a slide rail, 62-a driving control plate, 63-a moving unit, 631-a driving rack, 632-a driving gear, 633-a driving piece, 634-a slide seat, 635-a moving piece, 636-a moving gear, 64-an indication rod, 641-a moving part and 645-an extension part;
70-position detecting member;
80-two-dimensional code identification piece.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully below. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 to 5, a vision screening apparatus 100 according to an embodiment of the present invention includes a vertical frame 10, a detection mechanism 20 installed on the vertical frame 10, a position detection member 70 installed on the vertical frame 10, and a two-dimensional code recognition member 80; this eyesight screening device 100 is used for carrying out the visual acuity test to people's eyes, adjusts through the height to the visual acuity chart, makes the standard vision line sighting target of visual acuity chart and people's eye height corresponding, guarantees the accuracy of visual acuity test.
This grudging post 10 is the vertical orientation extension setting of straight plate form edge, and this grudging post 10 is used for supporting vision screening device 100, and the bottom of this grudging post 10 is provided with spike 11, and this spike 11 is the rectangle form and sets up along the horizontal direction, and spike 11 outwards extends the setting from grudging post 10 bottom, and this spike 11 is used for improving the stability of grudging post 10. In this embodiment, the stand 10 is provided with a lifting groove 15; this lift groove 15 is rectangular form and leads to the groove structure setting, and lift groove 15 corresponds the both sides of intercommunication grudging post 10, and lift groove 15 extends the setting along vertical direction, and this lift groove 15 is used for installing detection mechanism 20.
The detection mechanism 20 is arranged along the vertical direction, and the detection mechanism 20 is used for automatically detecting the eyes of a person; the detection mechanism 20 comprises a base plate 30, a lifting assembly 40 connected with the base plate 30, and a display assembly 50 and an indication assembly 60 which are correspondingly arranged on the base plate 30; the base plate 30 is in a rectangular straight plate shape and is arranged along the vertical direction, the base plate 30 is used for installing and fixing the detection mechanism 20, the base plate 30 is correspondingly arranged on one side of the stand 10 in a sliding manner, the arrangement position of the base plate 30 corresponds to the lifting groove 15, and the base plate 30 moves along the arrangement direction of the lifting groove 15; the lifting assembly 40 is disposed on one side of the base plate 30 close to the stand 10, the lifting assembly 40 is connected to the stand 10 and the base plate 30, and the lifting assembly 40 is correspondingly inserted into the lifting groove 15.
In this embodiment, the lifting assembly 40 includes a lifting rack 41, a lifting gear 42 engaged with the lifting rack 41, and a lifting member 43 connected to the lifting gear 42; the lifting rack 41 is in a long strip shape and is arranged along the vertical direction, the lifting rack 41 correspondingly penetrates through the lifting groove 15, the lifting rack 41 is fixedly connected with the substrate 30, the lifting rack 41 extends from the substrate 30 to the direction far away from the substrate 30, and one side of the lifting rack 41 back to the substrate 30 is in a sawtooth structure; the lifting gear 42 is cylindrical and arranged along the horizontal direction, the lifting gear 42 is correspondingly arranged on one side of the lifting rack 41 far away from the substrate 30, and the lifting gear 42 is correspondingly meshed with the lifting rack 41; the lifting member 43 is correspondingly connected and fixed with the lifting gear 42, the lifting member 43 is arranged through the lifting gear 42, the lifting member 43 is arranged along the horizontal direction, the lifting member 43 is correspondingly connected and fixed with the stand 10, and the lifting member 43 is used for driving the lifting gear 42 to rotate. Further, the elevating member 43 is a stepping motor.
The display assembly 50 is arranged on one side of the substrate 30, which is opposite to the lifting rack 41, and the display assembly 50 is correspondingly arranged along the vertical direction; the display assembly 50 includes a fixing base 51, a circuit board 52 connected to the fixing base 51, a backlight plate 53 connected to the circuit board 52, and a visual target 54 connected to the backlight plate 53. The fixing seat 51 is rectangular and is arranged along the vertical direction, the fixing seat 51 is correspondingly connected and fixed with the substrate 30, and the fixing seat 51 is used for fixing the display assembly 50 on the substrate 30; the circuit board 52 is rectangular and straight and is arranged along the vertical direction, and the circuit board 52 is fixed on the fixed seat 51; the backlight plate 53 is rectangular and straight-plate-shaped and is arranged along the vertical direction, the backlight plate 53 is correspondingly electrically connected with the circuit board 52, the backlight plate 53 is used for emitting light, the brightness of the detection mechanism 20 in the vision detection is ensured to meet the national standard, and meanwhile, the vision detection can be carried out in the environment with poor light; the visual target 54 is a rectangular straight plate and is arranged along the vertical direction, the circuit board 52, the backlight plate 53 and the visual target 54 are arranged in a parallel structure, and the backlight plate 53 is arranged between the circuit board 52 and the visual target 54. In this embodiment, the fixing base 51 is provided with a slot 510; the embedding slot 510 is configured in a rectangular groove-shaped structure, the embedding slot 510 extends from a side of the fixing base 51 far away from the substrate 30 to the substrate 30, and the circuit board 52, the backlight plate 53 and the visual target 54 are correspondingly embedded in the embedding slot 510 of the fixing base 51. Further, the visual target 54 is an eye chart; the visual target 54 is provided with a plurality of E-shaped visual targets, and each E-shaped identification is correspondingly provided with a position sensor, specifically, the position sensor is a hall sensor.
The indicating component 60 is arranged at one side of the display component 50, and the indicating component 60 is arranged corresponding to the display component 50; the indicating assembly 60 includes a connecting base 61, a driving control plate 62 connected to the connecting base 61, a moving unit 63 electrically connected to the driving control plate 62, and an indicating rod 64 connected to the moving unit 63. The connecting seat 61 is arranged along the vertical direction, one side of the connecting seat 61 is correspondingly connected and fixed with the substrate 30, and the connecting seat 61 is used for fixing the indicating component 60 on the substrate 30; the driving control board 62 is rectangular and straight and is arranged along the vertical direction, the driving control board 62 is correspondingly arranged on the connecting seat 61, the driving control board 62 is correspondingly electrically connected with the circuit board 52, and then the working state of the mobile unit 63 is controlled by the signal transmitted by the circuit board 52.
The moving unit 63 is correspondingly installed on the connecting seat 61, and the moving unit 63 is used for controlling the indicating rod 64 to move relative to the display assembly 50; the moving unit 63 includes a driving rack 631, a driving gear 632 engaged with the driving rack 631, a driving member 633 connected with the driving gear 632, a carriage 634 connected with the driving member 633, a traveling member 635 connected with the carriage 634, and a traveling gear 636 connected with the traveling member 635. The driving rack 631 is in a long strip shape and is arranged along the vertical direction, the driving rack 631 is correspondingly connected and fixed with the connecting seat 61, the arrangement direction of the driving rack 631 is the same as that of the lifting rack 41, and one side of the driving rack 631, which faces away from the connecting seat 61, is in a sawtooth structure; the driving gear 632 is arranged in a cylindrical structure along the horizontal direction, the driving gear 632 is correspondingly meshed with the driving rack 631, and the driving gear 632 can move up and down relative to the driving rack 631; the driving member 633 is correspondingly connected to the driving gear 632, the driving member 633 is correspondingly disposed through the driving gear 632, and the driving member 633 is used for driving the driving gear 632 to rotate. In the embodiment, the connecting seat 61 is provided with a slide rail 615; the slide rail 615 is cylindrical and is arranged along the vertical direction, the slide rail 615 correspondingly penetrates through the sliding seat 634, the arrangement direction of the slide rail 615 is the same as that of the driving rack 631, and the slide rail 615 is used for guiding the movement of the sliding seat 634; furthermore, the number of the slide rails 615 is two, and the two slide rails 615 are arranged on two sides of the driving rack 631 in parallel; the drive 633 is a stepper motor.
The sliding base 634 is arranged in a rectangular block structure, the sliding base 634 is correspondingly covered on the outer side of the driving element 633, the driving element 633 is correspondingly connected and fixed with the sliding base 634, the sliding base 634 is slidably arranged on the connecting base 61 along the direction of the driving rack 631, and the driving element 633 moves along the direction of the driving rack 631 to drive the sliding base 634 to move; the traveling member 635 is correspondingly arranged in the sliding seat 634, the traveling member 635 is fixedly connected with the sliding seat 634, and the traveling member 635 is used for driving the traveling gear 636 to rotate; the advancing gear 636 is arranged in a cylindrical structure, the advancing gear 636 is correspondingly sleeved on the advancing piece 635, the advancing gear 636 is correspondingly connected with the indicating rod 64, and the advancing gear 636 is used for driving the indicating rod 64 to move; the indicating rod 64 includes a traveling part 641 and an extending part 645 connected to the traveling part 641; the traveling part 641 extends in a long strip shape, the direction of the traveling part 641 is different from the direction of the driving rack 631, the side of the traveling part 641 close to the traveling gear 636 is arranged in a saw-toothed structure, and the traveling part 641 is correspondingly engaged with the traveling gear 636; the extending portion 645 is disposed at an end of the advancing portion 641 close to the display assembly 50, the extending portion 645 extends from the advancing portion 641 toward the visual target 54, and the extending portion 645 is used for indicating the visual target on the visual target 54, so as to ensure the detection of the eyesight. In this embodiment, the moving part 641 is correspondingly disposed through the slide mount 634, the indication rod 64 is slidably disposed on the slide mount 634 along the moving part 641, and the direction of the moving part 641 is perpendicular to the direction of the driving rack 631; the end of the extending portion 645 away from the moving portion 641 is provided with magnetism, so that the extending portion 645 triggers the hall sensor on the sighting mark element 54 to ensure the circuit board 52 to identify the position of the indication rod 64.
The position detecting piece 70 is correspondingly installed on the vertical frame 10, the position detecting piece 70 is arranged on one side of the vertical frame 10 where the display assembly 50 is arranged, and the position detecting piece 70 is used for ensuring that the distance between a person to be subjected to vision inspection and the vision screening device 100 is a specified detection distance; in the present embodiment, the position detector 70 is one of an ultrasonic distance measuring sensor, a laser distance measuring sensor and an infrared distance measuring sensor.
This two-dimensional code identification member 80 is the straight platelike vertical direction setting of edge of rectangle, and this two-dimensional code identification member 80 sets up the one side that is close to display module 50 at base plate 30, and this two-dimensional code identification member 80 is used for supplying to remove the end scanning recognition to make and remove the end and establish the relation of connection with vision screening device 100, and then guarantee that vision detection personnel can accomplish vision detection alone through this vision screening device 100. In this embodiment, the mobile terminal is one of a mobile phone, a tablet and a dedicated two-dimensional code scanning device, the dedicated two-dimensional code scanning device is a device correspondingly configured for the vision screening apparatus 100, and the vision detection operation of the user can be ensured through the dedicated two-dimensional code scanning device.
The working principle of the vision screening apparatus 100 in this embodiment is: scanning and recognizing the two-dimensional code recognition piece 80 through the mobile terminal, and further controlling the screening device to perform vision detection on eyes through the mobile terminal; the lifting assembly 40 respectively connected with the base plate 30 and the stand 10 is arranged, so that the height of the base plate 30 can be correspondingly adjusted through the lifting piece 43, and then the heights of the display assembly 50 and the indicating assembly 60 which are arranged on the base plate 30 are adjusted, the height of a standard line sighting mark on the sighting mark 54 corresponds to the height of human eyes, and the accuracy of vision detection is further ensured; by arranging the driving rack 631 and the driving gear 632, the driving member 633 controls the rotation of the driving gear 632, so that the driving gear 632 relatively moves along the direction of the driving rack 631, and further the sliding seat 634 is driven to move along the direction of the driving rack 631; by providing the advancing gear 636 and the advancing part 641, the rotation of the advancing gear 636 is controlled by the advancing member 635, so that the advancing part 641 moves relative to the slide seat 634, and the driving control board 62 controls the working states of the driving member 633 and the advancing member 635, so that the position of the indicating rod 64 corresponding to the visual target 54 can be correspondingly controlled, and the automatic visual detection is ensured.
The detection mechanism 20 realizes the lifting control of the substrate 30 by arranging the lifting component 40, and simultaneously ensures that the height of the display component 50 is adjusted by installing the display component 50 and the indicating component 60 on the substrate 30, so that the human eye detection angles during the vision detection are consistent, and the accuracy of the vision detection is improved; simultaneously through setting up mobile unit 63 and drive control panel 62, realize the automated control to instruction stick 64, make no longer need medical personnel to assist the detection at the in-process of visual acuity test, eliminate the error of manual operation, improve the accuracy of testing result, guarantee moreover to treat that visual acuity test personnel can independently accomplish visual acuity test, improve detection mechanism 20's practicality, more popularize not restricted by the detection place. The vision screening device 100 is provided with the two-dimensional code identification part 80 for scanning and identifying the mobile terminal, so that the mobile terminal and the vision screening device 100 are connected, and the vision testing personnel are guaranteed to independently complete vision testing; through setting up position detection spare 70, can correspond the distance that detects the eyesight measurement personnel apart from eyesight screening device 100, and then the suggestion eyesight measurement personnel correspond the adjustment, have guaranteed the accuracy of eyesight measurement.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A detection mechanism, comprising:
a substrate;
the lifting assembly is connected with the substrate;
the display assembly is arranged on the substrate and comprises a fixed seat connected with the substrate, a circuit board connected with the fixed seat and a backlight board connected with the circuit board; and
the indicating assembly is arranged on the substrate and corresponds to the display assembly; the indicating assembly comprises a connecting seat, a driving control board connected with the connecting seat, a moving unit electrically connected with the driving control board and an indicating rod connected with the moving unit; the driving control board is electrically connected with the circuit board, and the moving unit is used for controlling the indicating rod to move relative to the display component.
2. The detection mechanism of claim 1, wherein the display assembly further comprises a visual target; the visual target is connected with the backlight plate.
3. The detecting mechanism according to claim 2, wherein the circuit board, the backlight plate and the visual target are disposed in a parallel structure, the backlight plate is disposed between the circuit board and the visual target, and the circuit board, the backlight plate and the visual target are correspondingly embedded in the fixing base.
4. The detection mechanism according to claim 1, wherein the moving unit includes a driving rack connected to the connecting seat, a driving gear engaged with the driving rack, a driving member connected to the driving gear, a carriage connected to the driving member, a traveling member connected to the carriage, and a traveling gear connected to the traveling member; the traveling gear is correspondingly connected with the indicating rod.
5. The detection mechanism of claim 4, wherein the indicator bar includes a traveling portion and an extension portion connected to the traveling portion; the traveling part is arranged in a long strip shape in an extending mode, the setting direction of the traveling part is different from that of the driving rack, one side, close to the traveling gear, of the traveling part is arranged in a sawtooth structure, and the traveling part is correspondingly meshed with the traveling gear.
6. The detecting mechanism according to claim 5, wherein the moving portion is correspondingly disposed through the sliding seat, the indicating rod is slidably disposed on the sliding seat along the moving portion, and the sliding seat is slidably disposed on the connecting seat along the driving rack; the arrangement direction of the advancing part is perpendicular to the arrangement direction of the driving rack.
7. The detecting mechanism according to claim 4, wherein the connecting seat is provided with a slide rail; the slide rail correspondingly penetrates through the slide seat, and the arrangement direction of the slide rail is the same as that of the driving rack.
8. The detection mechanism of claim 1, wherein the lift assembly comprises a lift rack coupled to the substrate, a lift gear engaged with the lift rack, and a lift member coupled to the lift gear; the lifting rack is arranged on one side of the substrate back to the display component.
9. A vision screening device, comprising:
erecting a frame;
the detection mechanism according to any one of claims 1 to 8, wherein the detection mechanism is mounted on the vertical frame, the substrate is slidably disposed on one side of the vertical frame, and the lifting assembly is respectively connected with the vertical frame and the substrate;
the position detection piece is arranged on the vertical frame and is arranged on one side of the vertical frame, which is provided with the display assembly; and
the two-dimensional code identification piece is used for scanning and identifying the mobile terminal.
10. The vision screening apparatus of claim 9, wherein the stand is provided with a lifting slot; the lifting groove is in a long strip-shaped through groove structure, the substrate moves along the setting direction of the lifting groove, and the lifting assembly correspondingly penetrates through the lifting groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920548469.7U CN210330546U (en) | 2019-04-22 | 2019-04-22 | Detection mechanism and eyesight screening device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920548469.7U CN210330546U (en) | 2019-04-22 | 2019-04-22 | Detection mechanism and eyesight screening device |
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| CN210330546U true CN210330546U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111616675A (en) * | 2020-06-17 | 2020-09-04 | 李习勇 | Hospital's ophthalmic eyesight self-service detection device |
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2019
- 2019-04-22 CN CN201920548469.7U patent/CN210330546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111616675A (en) * | 2020-06-17 | 2020-09-04 | 李习勇 | Hospital's ophthalmic eyesight self-service detection device |
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