A visual acuity detection device with far-near switching mechanism

Abstract

The application relates to a visual acuity detection device with a near-far switching mechanism, and relates to the field of visual acuity detection. The device comprises a support frame, a rotating support frame horizontally rotatably arranged on the support frame, a display piece arranged on the rotating support frame, a first reflecting plate arranged on the rotating support frame, a driving mechanism arranged on the support frame and used for driving the rotating support frame to rotate, and a reflecting assembly arranged on the support frame. The rotating support frame is rotatably arranged on the support frame and has a near visual acuity detection station and a far visual acuity detection station. When the rotating support frame is located at the near visual acuity detection station, the display piece is vertically arranged and faces a person to be detected. When the rotating support frame is located at the far visual acuity detection station, the first reflecting plate and the reflecting assembly form a reflecting path through which light of the display piece is transmitted to the person to be detected. The application has the effect of improving the switching efficiency of near visual acuity detection and far visual acuity detection.

Description

Technical Field

[0001] This application relates to the field of vision testing, and in particular to a vision testing device with a near-far switching mechanism. Background Technology

[0002] With the increasing prevalence of electronic products, people are using their eyes more and more frequently, which can affect their vision. Visual acuity is the ability of the retina to distinguish images. In medical testing, it is generally divided into two categories: distance visual acuity testing and near visual acuity testing. Poor distance visual acuity with good near visual acuity may indicate myopia, astigmatism, etc. Poor near visual acuity with good distance visual acuity may indicate hyperopia.

[0003] Traditional vision testing tools primarily rely on physical visual acuity charts, such as printed or lightbox-style distance visual acuity charts with a standard logarithmic visual acuity chart, and handheld near vision cards. In current vision testing, distance visual acuity is typically tested by having the test subject identify the direction of the opening of the "E" or "C" on a standard logarithmic visual acuity chart at a distance of 5 meters, with one eye covered. Near visual acuity is tested by identifying the content on a near vision card at a distance of 40 centimeters.

[0004] Regarding the aforementioned technologies, traditional vision testing devices only perform either near vision testing or distance vision testing. In order to improve the testing efficiency of near vision testing and distance vision testing, the inventors believe that a device capable of performing both near vision testing and distance vision testing can be provided. Utility Model Content

[0005] In order to improve the detection efficiency of near vision and far vision, this application provides a vision detection device with a near-far switching mechanism.

[0006] The vision testing device with a near-far switching mechanism provided in this application adopts the following technical solution: A vision testing device with a near / far switching mechanism includes a support frame, a rotating bracket horizontally rotatably mounted on the support frame, a display element mounted on the rotating bracket, a first reflector mounted on the rotating bracket, a drive mechanism mounted on the support frame and driving the rotating bracket to rotate, and a reflective assembly mounted on the support frame. The rotating bracket is rotatably arranged on the support frame and has a near vision testing station and a far vision testing station. When the rotating bracket is in the near vision testing station, the display element is vertically arranged and faces the person being tested. When the rotating bracket is in the far vision testing station, the first reflector and the reflective assembly form a reflective path that directs light from the display element to the person being tested.

[0007] By adopting the above technical solution, the rotating bracket is set up with near vision testing station and far vision testing station. When near vision testing is required, the drive mechanism drives the rotating bracket to rotate, adjusting the display to face the person being tested directly. When far vision testing is required, the drive mechanism drives the rotating bracket to rotate, adjusting the display to face the reflective component. The display, the reflective component, and the first reflective plate form a reflective path, transmitting the light from the display to the person being tested, thus realizing the switching function of near and far vision testing.

[0008] Optionally, the rotating bracket includes a first mounting frame for mounting the display component, a second mounting frame for mounting the first reflector, two connecting side plates connecting the first mounting frame and the second mounting frame, and a rotating shaft connecting the two connecting side plates, wherein the driving mechanism is connected to the rotating shaft.

[0009] By adopting the above technical solution, a first mounting frame is set up to house the display component, and a second mounting frame is set up to house the first reflector, making the installation of the display component and the first reflector more stable. The drive mechanism can drive the rotating shaft to rotate, thereby driving the rotating bracket to rotate, which facilitates the switching of the rotating bracket between the near vision testing station and the far vision testing station, meeting the needs of both near vision testing and far vision testing.

[0010] Optionally, the rotating bracket further includes a reinforcing connecting plate connecting the first mounting frame and the second mounting frame, the reinforcing connecting plate having a first flap connecting the first mounting frame and a second flap connecting the second mounting frame.

[0011] By adopting the above technical solution, a reinforcing connecting plate is set on the rotating bracket. The reinforcing connecting plate is located between the first mounting frame and the second mounting frame. At the same time, the reinforcing connecting plate also has a first flap connecting the first mounting frame and a second flap connecting the second mounting frame, which can provide support for the display component in the first mounting frame and the first reflector in the second mounting frame, making them more stable during rotation.

[0012] Optionally, a transmission turbine is installed at the end of the rotating shaft, and the driving mechanism is a drive motor installed on the support frame. A transmission worm gear that cooperates with the transmission turbine is provided at the output shaft of the drive motor.

[0013] By adopting the above technical solution, the transmission worm at the output shaft of the drive motor cooperates with the transmission turbine at the end of the rotating shaft to transmit the power of the drive motor to the rotating shaft, thereby driving the rotating bracket to rotate on the support frame, realizing the switching of the rotating bracket between the near vision detection station and the far vision detection station, which facilitates the switching operation of near and far vision detection.

[0014] Optionally, the reflective assembly includes a second reflective plate arranged on one side of the rotating bracket, a third reflective plate arranged below the second reflective plate, a fourth reflective plate symmetrical to the third reflective plate, and a detection lens located above the fourth reflective plate; when the rotating bracket is in the distance vision detection position, the fourth reflective plate is located below the first reflective plate.

[0015] By adopting the above technical solution, the reflective components and the first reflective plate are set up to cooperate. When the rotating bracket is in the distance vision testing position, the second, third, and fourth reflective plates and the testing lens are used to realize the reflection and transmission of light. Together with the first reflective plate, the optical path arrangement required for distance vision testing is completed. The light emitted by the display can be transmitted to the first reflective plate for the person to be tested to observe, thus completing the distance vision test.

[0016] Optionally, the support frame has a lens hole at the top; a lens support groove is provided along the outer edge of the lens hole; and the support frame has lens clamping members located on both sides of the lens support groove and pressing the detection lens against the bottom surface of the lens support groove.

[0017] By adopting the above technical solution, the lens hole allows light to pass through, and the lens support groove set on the outer edge of the lens hole can support the detection lens. The lens clamping component is used to press the detection lens into the lens support groove, making the installation of the detection lens on the support frame more stable and improving the stability of the detection process.

[0018] Optionally, the support frame has a support base at the bottom; the top surface of the support base has a support ramp for the third reflector and the fourth reflector to be installed opposite each other; and the support ramps have limiting protrusions that abut against the bottom edges of the third reflector and the fourth reflector respectively.

[0019] By adopting the above technical solution, the supporting slope on the top surface of the supporting base provides support for the relative installation of the third and fourth reflective plates. The limiting boss in the middle can abut and limit the bottom edges of the third and fourth reflective plates, which improves the accuracy and stability of the installation and facilitates the smooth performance of distance vision testing.

[0020] Optionally, the top of the support frame is further provided with a reflective bracket; the top of the reflective bracket is provided with a reflective mounting plate for the second reflective plate to be arranged obliquely downwards, and reflective pressing members located on both sides of the second reflective plate and pressing the second reflective plate against the surface of the reflective mounting plate.

[0021] By adopting the above technical solution, a reflective bracket is set at the top of the support frame. The reflective mounting plate on the reflective bracket can tilt the second reflective plate downwards, reflecting the light from the display to the third reflective plate, which is beneficial to the formation of the reflection path. The reflective pressing component can press the second reflective plate firmly against the surface of the reflective mounting plate, improving the stability of the second reflective plate.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. A vision testing device with a near-far switching mechanism, which can switch between near vision testing station and far vision testing station by setting a rotating bracket, thereby reducing the switching time between near vision testing method and far vision testing method and improving testing efficiency; 2. By rotating the support, the position of the display can be switched, allowing the test subject to perform near vision and far vision tests without moving. This reduces errors and impacts caused by distance adjustments and improves the convenience and accuracy of the test. 3. By cooperating with the light from the display component to form a reflection path between the reflective component and the first reflective plate, it is possible to achieve distance vision detection that requires a long distance at close range, thereby reducing the requirement for actual detection distance and improving the versatility of the detection device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the vision testing device in the embodiments of this application.

[0024] Figure 2 This is a partial structural schematic diagram of the vision testing device in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the reflection path in an embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the rotating bracket in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the reflector bracket in an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the cooperation between the support frame and the third and fourth reflective plates in an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Support frame; 11. Support top plate; 111. Lens hole; 112. Lens support groove; 113. Lens clamping component; 1131. Lens pressing part; 1132. Lens locking part; 12. Support column; 13. Fixed bracket; 14. Reflector bracket; 141. Reflector mounting plate; 142. Reflector clamping component; 1421. Second pressing part; 1422. Second locking part; 15. Support base; 16. Triangular base; 17. Limiting boss; 2. Rotating bracket; 21. First mounting frame; 21 1. Display slot; 212. First pressing component; 2121. First pressing part; 2122. First locking part; 22. Second mounting frame; 23. Connecting side plate; 24. Rotating shaft; 241. Transmission worm gear; 25. Reinforcing connecting plate; 251. First flip plate; 252. Second flip plate; 3. Display component; 4. First reflector; 5. Drive mechanism; 51. Drive motor; 52. Transmission worm gear; 6. Reflection assembly; 61. Second reflector; 62. Third reflector; 63. Fourth reflector; 64. Detection lens. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] This application discloses a vision detection device with a near-far switching mechanism. (Refer to...) Figure 1 and Figure 2 A vision testing device with a near-far switching mechanism includes a support frame 1, a rotating bracket 2 horizontally rotatably mounted on the support frame 1, a display component 3 mounted on the rotating bracket 2, a first reflector plate 4 mounted on the rotating bracket 2, a drive mechanism 5 mounted on the support frame 1 and driving the rotating bracket 2 to rotate, and a reflective assembly 6 mounted on the support frame 1.

[0032] Reference Figure 1 and Figure 3 The rotating bracket 2 is rotatably arranged on the support frame 1 and has a near vision testing station and a far vision testing station. When the rotating bracket 2 is in the near vision testing station, the display element 3 is vertically arranged and faces the person being tested. When the rotating bracket 2 is in the far vision testing station, the first reflector 4 and the reflective assembly 6 form a reflective path for the light from the display element 3 to the person being tested.

[0033] Reference Figure 1 and Figure 4The support frame 1 has a top support plate 11 and four support columns 12 located at the lower corners of the top support plate 11. Two fixed brackets 13 are provided on the upper side of the top support plate 11, and a rotating bracket 2 is rotatably arranged on the two fixed brackets 13. The rotating bracket 2 includes a first mounting frame 21 for mounting the display component 3, a second mounting frame 22 for mounting the first reflector 4, two connecting side plates 23 connecting the first mounting frame 21 and the second mounting frame 22, and a rotating shaft 24 connecting the two connecting side plates 23.

[0034] Reference Figure 1 and Figure 4 The two ends of the rotating shaft 24 pass through the connecting side plate 23 and are rotatably connected to the fixed bracket 13. A transmission turbine 241 is installed on one end of the rotating shaft 24. The drive mechanism 5 is a drive motor 51 installed on the fixed bracket 13 near one end of the transmission turbine 241. The output shaft of the drive motor 51 is provided with a transmission worm gear 52 that drives the transmission turbine 241. When the drive motor 51 rotates, the transmission worm gear 52 drives the transmission turbine 241 to rotate, thereby driving the rotating shaft 24 to rotate.

[0035] Reference Figure 2 and Figure 4 The first mounting frame 21 has a display slot 211 on the side facing away from the rotation axis 24 for fixing the display component 3. The second mounting frame 22 has a first pressing member 212 on the side facing away from the rotation axis 24, located at both ends of the first reflector 4 and pressing the first reflector 4 against the surface of the second mounting frame 22. The first pressing member 212 includes a first pressing part 2121 that abuts against the surface of the first reflector 4 and a first locking part 2122 that is fixed to the second mounting frame 22.

[0036] Reference Figure 3 and Figure 4 The rotating bracket 2 also includes a reinforcing connecting plate 25 connecting the first mounting frame 21 and the second mounting frame 22. One end of the reinforcing connecting plate 25 has a first flap 251 that overlaps and locks with the first mounting frame 21, and the other end has a second flap 252 that overlaps and locks with the second mounting frame 22. A connecting side plate 23 connects the sides of the first mounting frame 21 and the second mounting frame 22 that are close together, while the reinforcing connecting plate 25 connects the sides of the first mounting frame 21 and the second mounting frame 22 that are far apart, thus forming a triangular stable structure between the first mounting frame 21, the second mounting frame 22, and the reinforcing connecting plate 25. When the rotating shaft 24 rotates, the connecting side plate 23 can drive the display panel and the first reflector 4 to rotate around the rotating shaft 24. When the display element 3 is vertically arranged facing the person being tested, the rotating bracket 2 is in the near vision testing position; when the display element 3 is vertically arranged facing away from the person being tested, the rotating bracket 2 is in the far vision testing position.

[0037] Reference Figure 1 and Figure 2The reflective assembly 6 includes a second reflective plate 61 arranged on one side of the rotating bracket 2, a third reflective plate 62 arranged below the second reflective plate 61, a fourth reflective plate 63 symmetrical to the third reflective plate 62, and a detection lens 64 located above the fourth reflective plate 63. When the rotating bracket 2 is in the distance vision detection position, the fourth reflective plate 63 is located below the first reflective plate 4.

[0038] Reference Figure 1 and Figure 5 A reflective bracket 14 is also provided on the upper side of the supporting top plate 11. The top of the reflective bracket 14 is provided with a reflective mounting plate 141 for the second reflective plate 61 to be arranged at an angle downwards, and reflective pressing members 142 located on both sides of the second reflective plate 61 and pressing the second reflective plate 61 against the surface of the reflective mounting plate 141. The reflective pressing member 142 includes a second pressing part 1421 abutting against the surface of the second reflective plate 61 and a second locking part 1422 fixed to the reflective mounting plate 141. The second reflective plate 61 is arranged at an angle downwards, reflecting the light emitted by the display unit 3 at the distance vision testing station to the lower third reflective plate 62.

[0039] Reference Figure 1 and Figure 6 The support frame 1 has a support base 15 at its bottom; the support base 15 has triangular bases 16 arranged opposite each other at its top. The top surface of the triangular bases 16 is a support ramp arranged opposite each other, and a limiting boss 17 is provided between the triangular bases 16. The third reflector 62 is arranged on the support ramp below the second reflector 61, and its bottom edge abuts against the limiting boss 17; the fourth reflector 63 is arranged on another opposite support ramp, and its bottom edge abuts against the limiting boss 17. The third reflector 62 receives the light from the second reflector 61 and then reflects it to the fourth reflector 63, which reflects the light to the detection lens 64 on the upper side.

[0040] Reference Figure 1 and Figure 2 A lens hole 111 is provided on the upper side of the fourth reflector 63 of the supporting top plate 11; a lens support groove 112 is provided on the outer edge of the lens hole 111; the detection lens 64 is placed in the lens support groove 112, and the outer edge of the bottom surface of the detection lens 64 abuts against the bottom surface of the lens support groove 112. The support frame 1 is provided with lens clamping members 113 located on both sides of the lens support groove 112 and pressing the detection lens 64 against the bottom surface of the lens support groove 112. The lens clamping member 113 includes a lens clamping part 1131 abutting against the surface of the detection lens 64 and a lens locking part 1132 fixed to the second mounting frame 22. After the detection lens 64 refracts the light, it is transmitted to the first reflector 4, and the first reflector 4 reflects the light to the person to be tested.

[0041] Reference Figures 1 to 6The implementation principle of a vision testing device with a near-far switching mechanism in this application embodiment is as follows: by setting a rotating bracket 2 to switch the positions of the display 3 and the first reflector 4, the switching between the near vision testing station and the far vision testing station is realized; the light from the display 3 forms a reflection path with the reflective component 6 and the first reflector 4, which can realize the far vision testing that requires a far distance at close range.

[0042] When a near vision test is required, the drive mechanism 5 drives the rotating bracket 2 to rotate to the near vision test station. The display 3 is vertically arranged and faces the person being tested. The near vision test is completed by displaying the test chart on the display 3. When a distance vision test is required, the drive mechanism 5 drives the rotating bracket 2 to rotate to the distance vision test station. The light from the display 3 passes through the reflection path in sequence, namely the second reflector 61, the third reflector 62, the fourth reflector 63 and the test lens 64, to reach the first reflector 4. The person being tested completes the distance vision test by displaying the content on the first reflector 4.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vision testing device with a near / far switching mechanism, characterized in that, The device includes a support frame (1), a rotating bracket (2) horizontally mounted on the support frame (1), a display element (3) mounted on the rotating bracket (2), a first reflector (4) mounted on the rotating bracket (2), a drive mechanism (5) mounted on the support frame (1) and driving the rotating bracket (2) to rotate, and a reflective assembly (6) mounted on the support frame (1). The rotating bracket (2) is rotatably arranged on the support frame (1) and has a near vision testing station and a far vision testing station. When the rotating bracket (2) is in the near vision testing station, the display element (3) is vertically arranged and faces the person to be tested. When the rotating bracket (2) is in the far vision testing station, the first reflector (4) and the reflective assembly (6) form a reflective path that transmits light from the display element (3) to the person to be tested.

2. The vision detection device with a near / far switching mechanism according to claim 1, characterized in that, The rotating bracket (2) includes a first mounting frame (21) for mounting the display (3), a second mounting frame (22) for mounting the first reflector (4), two connecting side plates (23) connecting the first mounting frame (21) and the second mounting frame (22), and a rotating shaft (24) connecting the two connecting side plates (23). The driving mechanism (5) is connected to the rotating shaft (24) in a transmission manner.

3. A vision detection device with a near / far switching mechanism according to claim 2, characterized in that, The rotating bracket (2) further includes a reinforcing connecting plate (25) connecting the first mounting frame (21) and the second mounting frame (22), the reinforcing connecting plate (25) having a first flap (251) connecting the first mounting frame (21) and a second flap (252) connecting the second mounting frame (22).

4. A vision detection device with a near / far switching mechanism according to claim 2, characterized in that, A transmission turbine (241) is installed at the end of the rotating shaft (24), and the driving mechanism (5) is a drive motor (51) installed on the support frame (1). A transmission worm (52) that cooperates with the transmission turbine (241) is provided at the output shaft of the drive motor (51).

5. A vision detection device with a near / far switching mechanism according to claim 1, characterized in that, The reflective assembly (6) includes a second reflective plate (61) arranged on one side of the rotating bracket (2), a third reflective plate (62) arranged below the second reflective plate (61), a fourth reflective plate (63) symmetrical to the third reflective plate (62), and a detection lens (64) located above the fourth reflective plate (63); when the rotating bracket (2) is in the distance vision detection position, the fourth reflective plate (63) is located below the first reflective plate (4).

6. A vision detection device with a near / far switching mechanism according to claim 5, characterized in that, The support frame (1) has a lens hole (111) at the top; a lens support groove (112) is provided on the outer edge of the lens hole (111); the support frame (1) is provided with lens clamping members (113) located on both sides of the lens support groove (112) and pressing the detection lens (64) against the bottom surface of the lens support groove (112).

7. A vision detection device with a near / far switching mechanism according to claim 5, characterized in that, The support frame (1) has a support base (15) at the bottom; the top surface of the support base (15) has a support slope for the third reflector (62) and the fourth reflector (63) to be installed opposite to each other; the support slope has a limiting boss (17) that abuts against the bottom edge of the third reflector (62) and the bottom edge of the fourth reflector (63) respectively.

8. A vision detection device with a near / far switching mechanism according to claim 5, characterized in that, The top of the support frame (1) is also provided with a reflective bracket (14); the top of the reflective bracket (14) is provided with a reflective mounting plate (141) for the second reflective plate (61) to be arranged obliquely downwards, and reflective pressing members (142) located on both sides of the second reflective plate (61) and pressing the second reflective plate (61) against the surface of the reflective mounting plate (141).

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