Far-near alternative visual training device and training method

Abstract

The invention discloses a far and near alternate visual training device and training method. The device comprises a base; the first display unit is arranged on the base; the second display unit is arranged above the first display unit in parallel; the spectroscope is obliquely arranged between the first display unit and the second display unit; the bracket is connected to the base; the displacement mechanism is arranged on the bracket; the concave reflecting mirror is arranged on the displacement mechanism and is driven by the displacement mechanism; the voice sensor is arranged on the bracket; the control unit is arranged on the support and used for receiving an instruction input by the voice sensor after voice recognition so as to control the first display unit and the second display unit to display images respectively, and the control unit further controls the displacement mechanism to operate; a data analysis program is further implanted in the first display unit and used for providing an instruction for adjusting the initial position of the concave reflector for the control unit and providing the position, matched with input data, of the concave reflector when a user initially uses the training device.

Description

Technical Field

[0001] The present invention relates to the technical field of vision testing equipment, and in particular to a vision training device and a training method for alternating near and far distances. The present invention particularly relates to a method for performing vision testing by using a display device that alternately generates near and far distance images through a common optical path. Background Art

[0002] As they age, primary and secondary school students spend more and more time using their eyes at close range, and the incidence of myopia is gradually increasing. If myopia is not prevented and controlled in time, it will gradually develop into high myopia, and the resulting decreased vision will have an irreversible impact on daily life.

[0003] For example, the Chinese patent with publication number CN118502091A discloses a display device and a method for switching between near and far images of the display device, wherein a display panel is arranged at an opening, an image display unit is arranged in a receiving cavity, and a driving component is connected to the image display unit to drive the image display unit to move; this method drives the image display unit to move by the driving component, so that the user can obtain far images or near images according to actual needs, which improves the problem that myopic people cannot see clear far images when they are not wearing glasses.

[0004] However, the above-mentioned related technologies have the following defects: (1) The above-mentioned patent solution has the problem that the distance of the distant image cannot be adjusted, and therefore cannot provide personalized vision training solutions for users with different vision; (2) When switching the near image, it is necessary to drive the image display unit to move to another angle. For the user, when switching the near image, the observation angle also changes and it is inconvenient to adjust; (3) When the display device is used for vision training, it is necessary to continuously switch the near image and the distant image through the driving component, and the mechanical noise generated by the driving component can easily make the user lose concentration, resulting in poor user experience and poor training effect. Summary of the invention

[0005] The present invention provides a near and far alternating vision training device, which aims to provide users with a device for vision training in a limited space. It achieves the purpose of promoting vision improvement and enhancement by simulating visual scenes at different distances, and at the same time solves the problems existing in the above-mentioned existing display devices when performing near and far alternating vision training.

[0006] To achieve the above object, the present invention is implemented by the following technical solutions:

[0007] The present invention provides a far and near alternating vision training device, which includes the following:

[0008] Base;

[0009] A first display unit, which is disposed on the base;

[0010] A second display unit, which is arranged above the first display unit in parallel;

[0011] A beam splitter, which is tilted and arranged between the first display unit and the second display unit;

[0012] A bracket connected to the base;

[0013] A displacement mechanism, which is arranged on the bracket;

[0014] a concave reflecting mirror, which is arranged on the displacement mechanism and located on one side of the first display unit, the second display unit and the beam splitter, and the displacement mechanism is used to adjust the position of the concave reflecting mirror;

[0015] A voice sensor, which is arranged on the base or the bracket, and is used to receive the voice information read by the user and perform voice information recognition;

[0016] and a control unit, which is arranged on the base or the bracket and is used to receive the command input by the voice sensor after voice recognition, so as to control the first display unit and the second display unit to display images respectively; at the same time, the control unit is also used to control the operation of the displacement mechanism;

[0017] The first display unit is also embedded with a data analysis program, which is used to provide the control unit with instructions for adjusting the initial position of the concave reflector, so as to provide the user with a concave reflector position that matches the input data when the user initially uses the training device;

[0018] The input data includes: vision data, age and gender factors entered by the user in the analysis program.

[0019] Specifically, in the present invention, the image displayed by the first display unit is reflected by the beam splitter, and then forms a virtual image on the back of the first display unit through the concave reflector. The concave reflector moves forward and backward with the displacement mechanism, and can adjust the position of the virtual image within a range of 3 to 10 meters from the human eye. The image displayed in the second display unit enters the human eye after being reflected by the beam splitter, and its image (virtual image) position is about 0.4 to 0.5 meters relative to the human eye, and the size of the image does not change. By controlling the alternating display of the first display unit and the second display unit respectively, the user can alternately observe the near image and the far image, thereby exercising the adjustment power of the eyes.

[0020] Furthermore, a near and far alternating vision training device: the angle between the dichroic mirror and the first display unit and the second display unit is set to 45°.

[0021] Furthermore, a near and far alternating vision training device: the displacement mechanism includes: a connecting member, a displacement slider, a slide table and a driving motor; the slide table is fixedly arranged on the bracket, the displacement slider is slidably arranged on the slide table and driven by the driving motor, the connecting member is arranged on the displacement slider, and the concave reflector is arranged on the connecting member.

[0022] Furthermore, a near and far alternating vision training device is provided: the driving motor is arranged on the slide, and the output shaft of the driving motor forms a lead screw connection with the displacement slider to drive the displacement slider to move on the slide.

[0023] Furthermore, a near and far alternating vision training device is provided: the driving motor drives the displacement slider to move on the slide table through a synchronous belt connection.

[0024] Furthermore, a near and far alternating vision training device: the displacement mechanism also includes a reflector fixing part; the concave reflector is fixedly arranged on the reflector fixing part, and the reflector fixing part is connected to the connecting part.

[0025] Furthermore, a near and far alternating vision training device: the voice sensor is arranged on the frame.

[0026] Furthermore, a near and far alternating vision training device: the control unit is arranged on the frame.

[0027] The present invention also provides a near and far alternating vision training method, which uses the above-mentioned training device and comprises the following steps:

[0028] S1. Preparation before training: Based on the vision data submitted by the user in the data analysis program and in combination with the user's age and gender factors, the data analysis program sends instructions to the control unit, thereby controlling the displacement mechanism to adjust the initial position of the concave reflector to the best;

[0029] S2, long-distance image display: controlling the first display unit to display an image of a specific size, the user observes and reads the image features, the voice sensor receives the voice information read by the user and compares the voice content with the image features actually displayed by the first display unit, and the comparison results are divided into the following cases;

[0030] ① If the user reads correctly for three or more times in a row, the control unit adjusts the first display unit to reduce the displayed image by one level;

[0031] ② If the user reads incorrectly for three or more times in a row, the control unit will adjust the first display unit to increase the displayed image by one level;

[0032] ③ If a user reading situation other than ① or ② occurs, the image display size of the first display unit will not be changed until the training is completed;

[0033] S3, close-range image display: controlling the second display unit to display an image of a specific size, the user observes and reads the image features, the voice sensor receives the voice information read by the user and compares the voice content with the image features actually displayed by the second display unit, and the comparison results are divided into the following cases;

[0034] ① If the user reads correctly for three or more times in a row, the control unit adjusts the second display unit to reduce the displayed image by one level;

[0035] ② If the user reads incorrectly for three or more times in a row, the control unit will adjust the second display unit to increase the displayed image by one level;

[0036] ③ If a user reading situation other than ① or ② occurs, the image display size of the second display unit will not be changed until the training is completed;

[0037] S4, near and far alternating vision training: Control the first display unit and the second display unit to alternately display images in random directions. After the user accurately reads the image features, the current image display is turned off and the next image display is turned on. This is repeated alternately until the training is completed.

[0038] Furthermore, a method for alternating near and far vision training is provided: in step S1, the displacement mechanism is controlled to adjust the initial position of the concave reflector to the optimal standard as follows:

[0039] ① If the vision data input by the user is 4.4 or below, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 3 meters behind the concave reflector;

[0040] ② If the vision data input by the user is 4.5, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 4 meters behind the concave reflector;

[0041] ③ If the vision data input by the user is 4.6, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 5 meters behind the concave reflector;

[0042] ④ If the vision data input by the user is 4.7, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 6 meters behind the concave reflector;

[0043] ⑤ If the vision data input by the user is 4.8, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 7 meters behind the concave reflector;

[0044] ⑥ If the vision data input by the user is 4.9, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 8 meters behind the concave reflector;

[0045] ⑦ If the vision data input by the user is 5.0 or above, the position of the concave reflector is adjusted by the displacement mechanism until the virtual image position of the image displayed in the first display unit is 10 meters behind the concave reflector.

[0046] Specifically, the images displayed in the first display unit and the second display unit of the present invention may be the letter E in different directions, or may be numbers, letters, Chinese characters, and the like.

[0047] Specifically, the first display unit forms a virtual image behind the concave reflector after passing through the beam splitter, and the size of the virtual image is related to the position of the virtual image; the second display unit forms a virtual image behind the beam splitter after passing through the beam splitter, and the size of the virtual image is consistent with the image displayed by the second display unit.

[0048] Specifically, the beam splitter in the present invention provides a coaxial common optical path function, which can partially reflect the image of the first display unit and then enter the user's eyes. The human eye sees a virtual image at a fixed position behind the beam splitter; at the same time, the image of the first display unit is partially reflected by the beam splitter, reflected by the concave reflector, and passed through the beam splitter again. After being imaged by the optical system, the virtual images of the first display unit and the second display unit are both directly in front of the user, belonging to a common optical path system. After the image is reflected by the concave reflector, it forms an upright and enlarged virtual image, and the position and size of the virtual image are related to the position of the image.

[0049] Beneficial effects of the present invention:

[0050] (1) The near-far alternating vision training device designed by the present invention can automatically adjust the image distance according to the user's vision condition (by adjusting the position of the concave reflector), so as to provide personalized vision training programs for users with different vision and meet the training needs of different users. At the same time, the near-far alternating vision training device of the present invention can enable the user to see a virtual image at a distance or near by adjusting the optical path, and can realize the function of automatically switching near and far images. Its automatic switching mechanism is exquisitely designed, and can quickly and smoothly switch near and far images without affecting the user's observation angle, greatly improving the convenience of switching.

[0051] (2) The near and far alternating vision training device of the present invention can adjust the position of the concave reflector by setting a displacement mechanism, thereby realizing the function of adjusting the size of the distant image. That is, the training device of the present invention can adjust the size of the distant image (virtual image) according to the vision data provided by different users, thereby providing personalized vision training programs for users with different vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 A schematic diagram of the structure of a near and far alternating vision training device designed for Example 1 of the present invention;

[0054] Figure 2 It is a schematic diagram of the structure of the displacement mechanism and the connection with the concave reflector in Example 1;

[0055] Figure 3 It is a schematic diagram of the imaging position of the first display unit when the position of the concave reflector changes;

[0056] Figure 4 Schematic diagram of the imaging position of the second display unit.

[0057] Markings in the figure: 1-base, 2-first display unit, 3-second display unit, 4-beam splitter, 5-bracket, 6-displacement mechanism, 7-concave reflector, 8-speech sensor, 9-control unit, 61-reflector fixing part, 62-connecting part, 63-displacement slider, 64-slide table, 65-driving motor. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating the position or positional relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0060] Example 1

[0061] like Figures 1-2 As shown, this embodiment 1 provides a far and near alternating vision training device, and the vision training device includes the following:

[0062] The base 1 can provide a stable placement for the training device body on the one hand, and can also provide a reading and writing platform for the user on the other hand;

[0063] A first display unit 2, which is disposed on the base 1, and the first display unit 2 may be a flat panel display device or a display screen integrated with a mainboard;

[0064] A second display unit 3, which is arranged above the first display unit 2 in parallel;

[0065] A beam splitter 4, which is tiltedly arranged between the first display unit 2 and the second display unit 3 (specifically, the angle between the beam splitter 4 and the first display unit 2 and the second display unit 3 is set to 45°);

[0066] A bracket 5, one end of which is connected to the base 1 and is located on one side of the first display unit 2; a displacement mechanism 6, which includes a reflector fixing member 61, a connecting member 62, a displacement slider 63, a slide 64 and a drive motor 65, wherein the slide 64 is fixedly arranged on one end of the bracket 5 away from the base 1, the displacement slider 63 is slidably arranged on the slide 64, the drive motor 65 is arranged on the slide 64 and the output shaft of the drive motor 65 forms a lead screw connection (ball screw) with the displacement slider 63 to drive the displacement slider 63 to move on the slide 64, the connecting member 62 is arranged on the displacement slider 63, and the reflector fixing member 61 is connected to the connecting member 62;

[0067] a concave reflecting mirror 7, which is fixedly disposed on the reflecting mirror fixing member 61 and is located on one side of the first display unit 2, the second display unit 3 and the beam splitter 4, and the position of the concave reflecting mirror 7 is adjusted by the displacement mechanism 6;

[0068] A voice sensor 8, which is arranged on the bracket 5, and is used to receive the voice information read by the user and perform voice information recognition;

[0069] and a control unit 9, which is disposed on the bracket 5 and is used to receive the command input by the voice sensor 8 after voice recognition, so as to control the first display unit 2 and the second display unit 3 to display images respectively; at the same time, the control unit 9 is also used to control the operation of the displacement mechanism 6;

[0070] Among them, the first display unit 2 is also implanted with a data analysis program, which is used to provide the control unit 9 with instructions for adjusting the initial position of the concave reflector 7, so as to provide the position of the concave reflector 7 matching the input data when the user initially uses the training device; the input data includes: vision data, age and gender factors entered by the user in the analysis program.

[0071] Specifically, the near-far alternating vision training device of Example 1 can enable the human eye to see a virtual image at a distance of about 40 to 50 cm from the human eye by adjusting the optical path. The near virtual image is provided by the second display unit 3, which is about 40 to 50 cm away from the human eye, and the size of the image does not change; the distant virtual image is provided by the first display unit 2, which is between 3 meters and 1 meter away from the human eye, and the position of the distant virtual image and the size of the image are adjustable.

[0072] Specifically, in the first embodiment, the base 1 and the bracket 5 play the role of fixed support, which can fix the main body of the training device at a certain height and ensure the stability of the main body position; the voice sensor 8 can be fixed on the front side of the bracket 5, and its function is to identify the user's voice command; the control unit 9 can be fixed on the back side of the bracket 5, and it has the following functions: ① receiving the signal input by the voice sensor 8; ② controlling the operation of the displacement mechanism 6; ③ controlling the display content of the first and second display units. The first display unit 2 can be a display flat panel, or an LCD screen of an integrated motherboard, or other types of electronic display screens, and has the following functions: ① installing vision training software (i.e., data analysis program) to provide vision training methods; ② during initialization, the displacement mechanism 6 is controlled to be in a reference position, at which time the position of the virtual image of the image displayed by the first display unit 2 through the optical path can be set to 5 meters behind the concave reflector 7, and of course the initial position can also be other values; ③ displaying an image of a certain content and controlling the display content of the second display unit 3 through the control unit 9.

[0073] Specifically, the function of the beam splitter 4 is to reflect part of the light and transmit part of the light. Figure 1 The image of the first display unit 2 is partially reflected by the beam splitter 4 to the concave reflector 7, and after being reflected by the beam splitter 4, part of the light is transmitted and incident to the human eye; the image displayed in the second display unit 3 is reflected by the beam splitter 4 and incident to the human eye. The curvature of the concave reflector 7 is f, which can be 1100 mm or other values.

[0074] refer to Figure 2 As shown, the concave reflector 7 and the reflector fixing member 61 can be fixed by gluing, and the reflector fixing member 61 is connected to the displacement slider 63 through the connecting member 62, and the displacement slider 63 can slide back and forth on the slide 64, and its sliding is driven by the driving motor 65, and the driving motor 65 can be a stepping motor or a linear motor with an integrated encoder. The displacement mechanism 6 can be a ball screw connection type or a synchronous belt connection type.

[0075] refer to Figure 3 As shown, when the concave reflecting mirror 7 is at the initial position P, the image displayed in the first display unit 2 is reflected by the beam splitter 4 and then incident on the concave reflecting mirror 7, and what is displayed is a virtual image 10. At this time, the position and size of the virtual image seen by the user are the reference virtual image 10; when the concave reflecting mirror 7 is adjusted to a certain displacement (at this time, the concave reflecting mirror 7 is at the P' position), the image displayed in the first display unit 2 is reflected by the beam splitter 4 and then incident on the concave reflecting mirror 7, and what is displayed is a virtual image 11. At this time, the position and size of the virtual image seen by the human eye are the reference virtual image 11.

[0076] refer to Figure 4 As shown, the image displayed in the second display unit 3 is reflected by the beam splitter 4 and then incident on the human eye. The virtual image seen by the human eye is the virtual image 12 , and the size of the virtual image 12 is consistent with the size of the image displayed in the second display unit 3 .

[0077] Example 2

[0078] This embodiment 1 provides a method for alternating near and far vision training, which adopts the training device designed in the above embodiment 1, and comprises the following steps:

[0079] S1. Preparation before training: Based on the vision data submitted by the user in the data analysis program and in combination with the user's age and gender factors, the data analysis program sends instructions to the control unit 9, thereby controlling the displacement mechanism 6 to adjust the initial position of the concave reflector 7 to the best;

[0080] S2, long-distance image display: control the first display unit 2 to display an image of a specific size, the user observes and reads the image features, the voice sensor 8 receives the voice information read by the user and compares the voice content with the image features actually displayed by the first display unit 2, and the comparison results are divided into the following cases;

[0081] ① If the user reads correctly for three or more times in a row, the control unit 9 adjusts the first display unit 2 to reduce the displayed image by one level;

[0082] ② If the user reads incorrectly for three or more times in a row, the control unit 9 adjusts the first display unit 2 to increase the displayed image by one level;

[0083] ③ If a user reading situation other than ① or ② occurs, the image display size of the first display unit 2 is not changed until the training is completed;

[0084] S3, close-range image display: Control the second display unit 3 to display an image of a specific size, the user observes and reads the image features, the voice sensor 8 receives the voice information read by the user and compares the voice content with the image features actually displayed by the second display unit 3, and the comparison results are divided into the following cases;

[0085] ① If the user reads correctly for three or more times in a row, the control unit 9 adjusts the second display unit 3 to reduce the displayed image by one level;

[0086] ② If the user reads incorrectly for three or more times in a row, the control unit 9 adjusts the second display unit 3 to increase the displayed image by one level;

[0087] ③ If a user reading situation other than ① or ② occurs, the image display size of the second display unit 3 will not be changed until the training is completed;

[0088] S4. Alternating near and far vision training: control the first display unit 2 and the second display unit 3 to alternately display images in random directions. For example, the first display unit 2 displays an image in random directions (letter E), and then after the user correctly reads the direction of the letter E, the first display unit 2 is turned off, and then the second display unit 3 displays an image in random directions (letter E). After the user correctly reads the direction of the letter E, the second display unit 3 is turned off and the first display unit 2 is displayed, and this alternation is repeated until the training is completed.

[0089] In step S1 of the above embodiment 2, the standard for controlling the displacement mechanism 6 to adjust the initial position of the concave reflector 7 to the best is as follows:

[0090] ① If the vision data input by the user is 4.4 or below, the position of the concave reflector 7 is adjusted until the virtual image position of the image displayed in the first display unit 2 is 3 meters behind the concave reflector 7;

[0091] ② If the vision data input by the user is 4.5, the position of the concave reflector 7 is adjusted until the virtual image position of the image displayed in the first display unit 2 is 4 meters behind the concave reflector 7;

[0092] ③ If the vision data input by the user is 4.6, the position of the concave reflector 7 is adjusted until the virtual image position of the image displayed in the first display unit 2 is 5 meters behind the concave reflector 7;

[0093] ④ If the vision data input by the user is 4.7, the position of the concave reflector 7 is adjusted until the virtual image position of the image displayed in the first display unit 2 is 6 meters behind the concave reflector 7;

[0094] ⑤ If the vision data input by the user is 4.8, the position of the concave reflector 7 is adjusted until the virtual image position of the image displayed in the first display unit 2 is 7 meters behind the concave reflector 7;

[0095] ⑥ If the vision data input by the user is 4.9, the position of the concave reflector 7 is adjusted until the virtual image position of the image displayed in the first display unit 2 is 8 meters behind the concave reflector 7;

[0096] ⑦ If the vision data input by the user is 5.0 or above, the position of the concave reflector 7 is adjusted until the position of the virtual image of the image displayed in the first display unit 2 is 10 meters behind the concave reflector 7.

[0097] The above are preferred embodiments of the present invention and are only used to explain the present invention, not to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A near and far alternating vision training device, characterized in that: The vision training device comprises the following: Base (1); A first display unit (2) disposed on the base (1); A second display unit (3) arranged parallel to and above the first display unit (2); a beam splitter (4) arranged obliquely between the first display unit (2) and the second display unit (3); A bracket (5) connected to the base (1); A displacement mechanism (6) disposed on the support (5); a concave reflecting mirror (7), which is arranged on the displacement mechanism (6) and is located on one side of the first display unit (2), the second display unit (3) and the beam splitter (4), and the displacement mechanism (6) is used to adjust the position of the concave reflecting mirror (7); A voice sensor (8), which is arranged on the base (1) or the bracket (5) and is used to receive voice information read by a user and perform voice information recognition; and a control unit (9), which is arranged on the base (1) or the bracket (5) and is used to receive instructions input by the voice sensor (8) after voice recognition, so as to control the first display unit (2) and the second display unit (3) to respectively display images; at the same time, the control unit (9) is also used to control the operation of the displacement mechanism (6); The first display unit (2) is also embedded with a data analysis program, which is used to provide the control unit (9) with instructions for adjusting the initial position of the concave reflector (7), thereby providing the user with a position of the concave reflector (7) that matches the input data when the user initially uses the training device; The input data includes: vision data, age and gender factors entered by the user in the analysis program.

2. The device for alternating near and far vision training according to claim 1, characterized in that: The included angle between the beam splitter (4) and the first display unit (2) and the second display unit (3) is set to 45°.

3. The device for alternating near and far vision training according to claim 1, characterized in that: The displacement mechanism (6) comprises: a connecting member (62), a displacement slider (63), a slide table (64) and a driving motor (65); The slide table (64) is fixedly arranged on the bracket (5), the displacement slider (63) is slidably arranged on the slide table (64) and driven by the drive motor (65), the connecting member (62) is arranged on the displacement slider (63), and the concave reflector (7) is arranged on the connecting member (62).

4. The device for alternating near and far vision training according to claim 3, characterized in that: The driving motor (65) is arranged on the slide (64), and the output shaft of the driving motor (65) forms a lead screw connection with the displacement slider (63) so as to drive the displacement slider (63) to move on the slide (64).

5. The device for alternating near and far vision training according to claim 3, characterized in that: The driving motor (65) drives the displacement slider (63) to move on the slide table (64) through a synchronous belt connection.

6. The device for alternating near and far vision training according to claim 3, characterized in that: The displacement mechanism (6) further comprises a reflector fixing member (61); The concave reflector (7) is fixedly arranged on the reflector fixing member (61), and the reflector fixing member (61) is connected to the connecting member (62).

7. The device for alternating near and far vision training according to claim 1, characterized in that: The voice sensor (8) is arranged on the frame (5).

8. The device for alternating near and far vision training according to claim 1, characterized in that: The control unit (9) is arranged on the frame (5).

9. A method for alternating near and far vision training, characterized in that: The method adopts the training device according to any one of claims 1 to 8, and the method comprises the following steps: S1. Preparation before training: Based on the vision data submitted by the user in the data analysis program and in combination with the user's age and gender factors, the data analysis program sends instructions to the control unit (9), thereby controlling the displacement mechanism (6) to adjust the initial position of the concave reflector (7) to the best; S2, long-distance image display: controlling the first display unit (2) to display an image of a specific size, the user observing and reading the image features, the voice sensor (8) receiving the voice information read by the user and comparing the voice content with the image features actually displayed by the first display unit (2), the comparison results are divided into the following situations; ① If the user reads correctly three times or more in a row, the control unit (9) adjusts the first display unit (2) to reduce the displayed image by one level; ② If the user reads incorrectly three times or more in succession, the control unit (9) adjusts the first display unit (2) to increase the displayed image by one level; ③ If a user reading situation other than ① or ② occurs, the image display size of the first display unit (2) is not changed until the training is completed; S3, close-range image display: controlling the second display unit (3) to display an image of a specific size, the user observing and reading out the image features, the voice sensor (8) receiving the voice information read out by the user and comparing the voice content with the image features actually displayed by the second display unit (3), the comparison results being classified into the following cases; ① If the user reads correctly three times or more in a row, the control unit (9) adjusts the second display unit (3) to reduce the displayed image by one level; ② If the user reads incorrectly three times or more in succession, the control unit (9) adjusts the second display unit (3) to increase the displayed image by one level; ③ If a user reading situation other than ① or ② occurs, the image display size of the second display unit (3) is not changed until the training is completed; S4, near and far alternating vision training: the first display unit (2) and the second display unit (3) are controlled to alternately display images in random directions. After the user accurately reads the image features, the current image display is closed and the next image display is opened. This process is repeated alternately until the training is completed.

10. The method for alternating near and far vision training according to claim 9, characterized in that: In step S1, the displacement mechanism (6) is controlled to adjust the initial position of the concave reflector (7) to the optimum standard as follows: ① If the visual acuity data input by the user is 4.4 or below, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 3 meters behind the concave reflector (7); ② If the vision data input by the user is 4.5, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 4 meters behind the concave reflector (7); ③ If the visual acuity data input by the user is 4.6, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 5 meters behind the concave reflector (7); ④ If the visual acuity data input by the user is 4.7, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 6 meters behind the concave reflector (7); ⑤ If the visual acuity data input by the user is 4.8, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 7 meters behind the concave reflector (7); ⑥ If the visual acuity data input by the user is 4.9, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 8 meters behind the concave reflector (7); ⑦ If the vision data input by the user is 5.0 or above, the position of the concave reflector (7) is adjusted until the position of the virtual image of the image displayed in the first display unit (2) is 10 meters behind the concave reflector (7).

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