A mirror disc assembly for a vision function device

Abstract

The utility model provides a kind of mirror disc assembly for visual function equipment, belong to visual function equipment field, it includes two symmetrical mirror disc racks, at least two parallel disc bodies are rotatably connected on each mirror disc rack, and the disc body on two mirror disc racks is symmetrically arranged, each disc body is provided with several lenses along circumference;Driving part, with the disc body one-to-one correspondence setting, and for driving corresponding the disc body rotation;Control part, for the driving part drives target lens on each disc body and rotates to preset position;First detection part, with the disc body one-to-one correspondence setting, and for detecting the rotation angle of corresponding disc body;Second detection part, with the disc body one-to-one correspondence setting, and for detecting whether target lens on corresponding disc body rotates to preset position.The application has effectively improved the rotation accuracy of disc body, avoids the effect that there is larger deviation between target lens and preset position.

Description

Technical Field

[0001] This utility model belongs to the field of visual function devices, and specifically relates to a mirror disk assembly for visual function devices. Background Technology

[0002] Visual function devices can test or train the eye's accommodation, fusion, and convergence abilities through different lenses, in order to understand or restore the eye's visual function.

[0003] Existing visual function devices include two symmetrically arranged lens holders, on which a disc-shaped disc body is rotatably mounted. Several different lenses are arranged circumferentially on the disc body. The disc body is connected to a drive component, which drives the disc body to rotate on the lens holder, thereby rotating the different lenses to preset positions to facilitate corresponding tests or training of the eyeball.

[0004] However, during the rotation of the disc, the target lens often deviates in rotation position due to the low precision of the drive components. However, higher precision drive components would double the cost of the equipment, and the precision would inevitably be affected after long-term use. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and provide a mirror assembly for visual devices.

[0006] In a first aspect, this utility model provides a mirror disk assembly for a visual device, employing the following technical solution:

[0007] A mirror assembly for a visual device, comprising:

[0008] Two symmetrically arranged mirror holders, each of which is rotatably connected to at least two parallel discs, and the discs on the two mirror holders are symmetrically arranged, with a plurality of lenses arranged on each disc along the circumferential direction;

[0009] A drive unit is provided in a one-to-one correspondence with each of the disc bodies and is used to drive the corresponding disc body to rotate;

[0010] The control unit is used to drive the drive unit (6) to rotate the target lens on each of the disk bodies (2) to a preset position;

[0011] The first detection unit is provided in a one-to-one correspondence with the disk body and is used to detect the rotation angle of the corresponding disk body;

[0012] The second detection unit is configured in a one-to-one correspondence with the disk body and is used to detect whether the target lens on the corresponding disk body has rotated to a preset position.

[0013] Optionally, the disc body has a plurality of limiting holes along the circumferential direction that correspond one-to-one with the lens. When the second detection unit detects the limiting hole, the corresponding lens rotates to a preset position.

[0014] Optionally, the limiting hole is elongated along the radial direction of the disc body, and the width of the limiting hole is 0.4-0.6 mm.

[0015] Optionally, the plurality of lenses and the plurality of limiting holes are evenly distributed along the circumference of the disc body.

[0016] Optionally, a reset hole is provided on the disc body, the reset hole is located between two adjacent limiting holes, and the reset hole and the limiting hole are located on the same circumference.

[0017] Optionally, the first detection unit is an angle encoder.

[0018] Optionally, each of the lenses on the same disc includes a plurality of spherical lenses with equally spaced increasing power, and the magnitude of the equally spaced increasing power of the spherical lenses on different discs on the same side is different.

[0019] Optionally, an adjustment part for adjusting the distance between the two sets of mirror holders is provided between them.

[0020] Optionally, a central shaft fixed to the mirror plate frame is rotatably inserted through the center of the disc body, and a plane bearing is installed between the two sides of the disc body and the central shaft.

[0021] Optionally, the center of the disc protrudes towards the inside of the visual device and forms a recessed mounting groove on the outside of the visual device, and the planar bearing is located in the mounting groove.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. By setting up a first detection unit, the angle through which the disk body rotates can be detected, effectively improving the rotation accuracy of the disk body and avoiding large deviations between the target lens and the preset position;

[0024] 2. By setting a second detection unit, it is possible to detect whether the target lens has rotated to a preset position, and by cooperating with the limiting hole, the rotation accuracy of the disc body is further improved;

[0025] 3. By setting up several discs on the same disc holder, more types and a wider range of testing and training needs can be met through the combination of target lenses on several discs, thus expanding the applicability of visual function equipment. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the mirror disk assembly according to an embodiment of this application;

[0027] Figure 2 This is a partial structural diagram of the front side of the mirror disk assembly according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the disk body according to an embodiment of this application;

[0029] Figure 4 This is a partial structural diagram of the rear side of the mirror disk assembly according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Lens holder; 2. Disc body; 21. Limiting hole; 22. Reset hole; 23. Center hole; 24. Center shaft; 25. Assembly slot; 26. Surface bearing; 3. Lens; 4. First detection unit; 5. Second detection unit; 6. Drive unit; 61. Drive gear set; 62. Stepper motor; 7. Base; 8. Adjustment unit; 81. Screw; 82. Guide rod; 83. Adjustment gear set; 84. Adjustment motor. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail as follows:

[0032] This application discloses a mirror disk assembly for a visual function device.

[0033] A mirror disk assembly for a visual function device, referenced Figure 1 The system includes a base 7 and two mirror holders 1 arranged on opposite sides of the base 7. A vertically arranged disc 2 is rotatably connected to the mirror holder 1. The disc 2 is disc-shaped and has a number of lenses 3 arranged circumferentially on the disc 2. The lenses 3 include, but are not limited to, spherical lenses, prisms, cylindrical lenses and red-green lenses. The disc 2 is connected to a drive unit 6, which is used to drive the disc 2 to rotate so that different lenses 3 rotate to preset positions and perform corresponding visual function tests or training.

[0034] Reference Figure 2 and Figure 3 Several disc bodies 2 are arranged in parallel on the mirror disc holder 1. In this embodiment, each mirror disc holder 1 is provided with two disc bodies 2. A central hole 23 is opened at the center of the disc body 2. A central shaft 24 fixed to the mirror disc holder 1 is rotatably inserted in the central hole 23. A plane bearing 26 is installed between the two sides of the disc body 2 and the central shaft 24.

[0035] Reference Figure 2 and Figure 3The center of the disc body 2 protrudes towards the inside of the visual function device and forms a recessed mounting groove 25 on the outside of the visual function device. The central hole 23 is coaxially set in the mounting groove 25 so that the planar bearing 26 of the disc body 2 near the outside of the visual function device can be installed in the mounting groove 25, thereby making the lens 3 closer to the outside of the visual function device to shorten the distance between the lens 3 and the eyeball during training and improve the training effect.

[0036] Reference Figure 2 and Figure 4 The outer circumference of the disc body 2 is machined into a gear shape. The drive unit 6 includes a drive gear and a stepper motor 62. The drive gear set 61 is a reduction gear set, which is rotatably connected to the mirror disc frame 1. The stepper motor 62 is fixedly mounted on the mirror disc frame 1 and is fixedly connected to the input gear of the drive gear set 61, and is used to drive the input gear of the drive gear set 61 to rotate. The output gear of the drive gear set 61 meshes with the disc body 2, and the diameter of the output gear of the drive gear set 61 is smaller than the diameter of the disc body 2. To facilitate the installation of the drive unit 6, the drive units 6 of the two disc bodies 2 on the same mirror disc frame 1 are respectively arranged on both sides of the mirror disc frame 1.

[0037] The mirror assembly also includes a control unit (not shown in the figure). The control unit can be a PLC controller, an integrated circuit board, etc. The control unit is used to obtain the angle between the target lens position and the preset position and rotate the target lens to the preset position.

[0038] Reference Figure 2 In this embodiment, several lenses 3 on the disk 2 are evenly distributed circumferentially so that the distribution angles between adjacent lenses 3 are equal.

[0039] Specifically, the control unit will determine the target lens for each disc 2 based on the inspection or training item to be performed, and then determine the angle between the target lens position and the preset position based on the lens 3 at the current preset position and the known angular relationship between the lenses 3 on the disc 2.

[0040] Reference Figure 2 and Figure 4 To improve the rotation accuracy of the disc 2, the mirror disc assembly also includes a first detection unit 4. The first detection unit 4 is used to detect the corresponding rotation angle of the disc 2. Several first detection units 4 are provided, and each one corresponds to a disc 2. In this embodiment, the first detection unit 4 is an angle encoder, which is fixedly mounted on the shaft of the drive gear set 61 that drives the disc 2 to rotate. When the disc 2 rotates through the set rotation angle, the controller controls the stepper motor 62 to stop.

[0041] To further improve the accuracy of the target lens remaining at the preset position, several circumferentially distributed limiting holes 21 corresponding one-to-one with the lenses 3 are provided on the disk body 2. The limiting holes 21 are located on the side of the lens 3 near the edge of the disk body 2 and between two adjacent lenses 3. The mirror disk assembly also includes a second detection unit 5, which is used to detect the limiting holes 21 and thus detect whether the target lens has rotated to the preset position. In this embodiment, the second detection unit 5 is a photoelectric switch, which is located on the side of the two disk bodies 2 that are far apart from each other and is fixedly connected to the mirror disk frame 1. When the photoelectric switch detects one of the limiting holes 21, the corresponding lens 3 rotates to the preset position, thereby facilitating the positioning of the target lens during the lens 3 switching process.

[0042] Furthermore, referring to Figure 2 and Figure 3 The limiting hole 21 is elongated, with its length direction being the radial direction of the disk body 2. Even with installation errors between the photoelectric switch and the limiting hole 21 along its length, it ensures that the photoelectric switch can still detect the limiting hole 21, thus improving detection accuracy. Furthermore, the width of the limiting hole 21 is set to 0.4-0.6 mm to improve the positioning accuracy of the lens 3.

[0043] Reference Figure 2 and Figure 3 To facilitate the reset of the disc 2 to zero when the visual device is powered on, a reset hole 22 is provided on the disc 2. The reset hole 22 is located between two adjacent limiting holes 21 and is on the same circumference as the limiting holes 21. The shape and size of the reset hole 22 are the same as those of the limiting holes 21. During the rotation of the disc 2, when the photoelectric switch detects two adjacent limiting holes 21, the angle through which the disc 2 has rotated is equal and is the distribution angle of the two adjacent lenses 3 on the disc 2. When the photoelectric switch detects the reset hole 22 and the previous limiting hole 21, the angle through which the disc 2 has rotated is less than the distribution angle of the two adjacent lenses 3 on the disc 2. It is determined that the disc 2 will be reset to zero when the photoelectric switch detects the next limiting hole 21, at which point the disc 2 stops rotating.

[0044] Specifically, each of the several lenses 3 on the same disc 2 includes several spherical lenses with equally spaced increasing power, and the spherical lenses on the two discs 2 of the same mirror frame 1 have different equally spaced increasing power, and the spherical lenses include positive power lenses and negative power lenses.

[0045] After determining the combined lens power based on the examination or training item to be performed, the individual lens powers corresponding to the lenses 3 on the two discs 2 are calculated based on the combined lens power, thus determining the target lens. Both the combined lens power and the individual lens power include positive and negative values; the combined lens power is the algebraic sum of the two individual lens powers. By superimposing the lenses 3 on the two discs 2, the range of lens power values ​​is effectively expanded.

[0046] Additionally, refer to Figure 1 To adjust the distance between the two mirror holders 1, an adjustment part 8 is provided between them. The adjustment part 8 includes a screw 81, a guide rod 82, an adjustment gear set 83, and an adjustment motor 84. Two bolts are coaxially arranged and pass through the bottom of the two mirror holders 1 respectively. The length direction of the screw 81 is the direction in which the two mirror holders 1 move closer or further apart. The screw 81 is threaded to the mirror holder 1, and the threads of the two screws 81 are opposite in direction. The two screws 81 are connected by a coupling. The length direction of the guide rod 82 is the same as that of the screw 81. In the same direction, guide rods 82 are inserted through the bottom of mirror plate holder 1, and two guide rods 82 are inserted through the bottom of each mirror plate holder 1. Both ends of the guide rods 82 are fixedly connected to the base 7. Adjustment gear set 83 is rotatably mounted on the base 7. The output gear of adjustment gear set 83 is fixedly connected to one end of one of the screws 81 and is used to drive the screw 81 to rotate. Adjustment motor 84 is fixedly mounted on the base 7 and is fixedly connected to the input gear of adjustment gear set 83 and is used to drive the input gear of adjustment gear set 83 to rotate.

[0047] Since different users have different interpupillary distances, in order to improve the testing and training effect of the visual function device, the distance between the two mirror holders 1 is adjusted by the adjustment unit 8 for different interpupillary distances, so that the visual function device can be used for users with different interpupillary distances.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In the description of this utility model, unless otherwise stated, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Finally, it should be noted that the above technical solution is only one implementation of this utility model. For those skilled in the art, based on the application methods and principles disclosed in this utility model, it is easy to make various types of improvements or modifications, and not limited to the methods described in the above specific implementation of this utility model. Therefore, the methods described above are only preferred and do not have a limiting meaning.

Claims

1. A mirror assembly for a visual device, characterized in that, include: Two symmetrically arranged mirror plate holders (1), each of which is rotatably connected to at least two parallel disc bodies (2), and the disc bodies (2) on the two mirror plate holders (1) are symmetrically arranged, and each disc body (2) is provided with a plurality of lenses (3) along the circumferential direction; A drive unit (6) is provided in a one-to-one correspondence with the disk body (2) and is used to drive the corresponding disk body (2) to rotate; a control unit is used to enable the drive unit (6) to drive the target lens on each disk body (2) to rotate to a preset position. The first detection unit (4) is provided in a one-to-one correspondence with the disk body (2) and is used to detect the rotation angle of the corresponding disk body (2); The second detection unit (5) is provided in a one-to-one correspondence with the disk body (2) and is used to detect whether the target lens on the corresponding disk body (2) has rotated to a preset position.

2. A mirror disk assembly for a visual function device according to claim 1, characterized in that, The disc body (2) has a plurality of limiting holes (21) that correspond one-to-one with the lens (3) along the circumferential direction. When the second detection unit (5) detects the limiting hole (21), the corresponding lens (3) rotates to a preset position.

3. A mirror disk assembly for a visual function device according to claim 2, characterized in that, The limiting hole (21) is elongated along the radial direction of the disc body (2), and the width of the limiting hole (21) is 0.4-0.6mm.

4. A mirror disk assembly for a visual function device according to claim 2, characterized in that, Several of the lenses (3) and several of the limiting holes (21) are evenly distributed around the circumference of the disc body (2).

5. A mirror disk assembly for a visual function device according to claim 4, characterized in that, The disk body (2) is provided with a reset hole (22), which is located between two adjacent limiting holes (21), and the reset hole (22) and the limiting hole (21) are located on the same circumference.

6. A mirror disk assembly for a visual function device according to claim 1, characterized in that, The first detection unit (4) is an angle encoder.

7. A mirror disk assembly for a visual function device according to claim 1, characterized in that, Each of the lenses (3) on the same disc body (2) includes a number of spherical lenses with equal intervals of increasing power, and the spherical lenses on different disc bodies (2) of the same mirror plate frame (1) have different intervals of increasing power.

8. A mirror disk assembly for a visual function device according to claim 1, characterized in that, An adjustment part (8) for adjusting the distance between the two sets of mirror holders (1) is provided between them.

9. A mirror disk assembly for a visual function device according to claim 1, characterized in that, The center of the disc body (2) is rotatably connected to the central shaft (24) fixed to the mirror disc frame (1), and a plane bearing (26) is installed between the two sides of the disc body (2) and the central shaft (24).

10. A mirror disk assembly for a visual function device according to claim 9, characterized in that, The center of the disc (2) protrudes towards the inside of the visual function device and forms a recessed assembly groove (25) on the outside of the visual function device. The planar bearing (26) is located in the assembly groove (25).

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