Adjusting mechanism of electronic reverse racket

Abstract

The utility model discloses an adjusting mechanism for an electron reversal beat, and the electron reversal beat comprises two dual-optical-path electronic display systems. The electronic reversal racket further comprises a fixing plate, a first support, a second support and a third support, the second reflecting mirror and the third reflecting mirror in the two double-light-path electronic display systems are arranged on the first support, and the first reflecting mirror, the fourth reflecting mirror, the polarizing beam splitter and the positive lens corresponding to left eye display are arranged on the second support. A first reflecting mirror, a fourth reflecting mirror, a polarizing beam splitter and a positive lens corresponding to right eye display are arranged on a third bracket; the first support can only move in the vertical direction relative to the fixing plate, and the second support and the third support do not move in the vertical direction relative to the fixing plate. According to the electron reversal racket, the difference value of the diopters corresponding to the two display light paths can be changed by moving the second reflecting mirror and the third reflecting mirror in the same direction, and the training intensity of eyes can be adjusted.

Description

Technical Field

[0001] The utility model relates to an adjusting mechanism for an electronic reversal racket, which realizes a training effect similar to that of a mechanical reversal racket on human eyes through a double-light path electronic display system. Background Art

[0002] The reverse racket is also called the flip racket or butterfly racket. It is composed of two pairs of positive and negative lenses with equal diopters. The reverse racket is generally used to change the accommodative stimulation of the eyes. The positive lens reduces the accommodative stimulation, the negative lens increases the accommodative stimulation, and the convergent stimulation remains unchanged. Therefore, the change of accommodative convergence is accompanied by a change of fusional convergence of the same magnitude but opposite direction. When using the reverse racket for human eye training, a card is set at a fixed position in front of the reverse racket. The human eye uses the reverse racket to recognize the image formed by the card through the lens; by switching lenses of different diopter, the human eye recognizes images at different positions, thereby achieving the training purpose. In the process of using the reverse racket for training, the two pairs of spherical lenses need to be switched back and forth constantly.

[0003] The existing reverse camera relies on manual or mechanical control to switch the positions of multiple lenses with different diopter. The manual method increases the burden on people and is difficult to stick to. The mechanical method is noisy and takes a certain amount of time to adjust. In addition, this lens switching method requires the human eye to constantly adapt to different lenses to keep the visual axis and the center of the lens consistent. The truly effective training time cannot be guaranteed, and the effect of the training will be affected to a certain extent.

[0004] In addition, when adjusting the training intensity of the existing reverse racket, it is necessary to replace the spherical lens with a different diopter, or to purchase a new reverse racket, which is inconvenient to use and increases the cost for users. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an adjustment mechanism for an electronic reverse beat.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] An adjustment mechanism for an electronic reversal camera, the electronic reversal camera comprising two dual-optical path electronic display systems, corresponding to left-eye display and right-eye display respectively; wherein each dual-optical path electronic display system comprises a first display optical path, a second display optical path and a controller, the positions of virtual images formed by the first display optical path and the second display optical path are different; the controller is used to control the first display optical path and the second display optical path to display alternately;

[0008] The first display optical path includes a first image source, a first reflector, a second reflector, a polarization beam splitter, and a positive lens arranged in sequence from the image source towards the exit pupil direction; the second display optical path includes a second image source, a third reflector, the polarization beam splitter, a fourth reflector, the polarization beam splitter, and the positive lens arranged in sequence from the image source towards the exit pupil direction. A phase retarder is provided between the polarization beam splitter and the fourth reflector.

[0009] The flipper also includes a fixing plate, a first bracket, a second bracket, and a third bracket. Among them, the second reflector and the third reflector in the two dual - optical - path electronic display systems are arranged on the first bracket, the first reflector, the fourth reflector, the polarization beam splitter, and the positive lens corresponding to the left - eye display are arranged on the second bracket, and the first reflector, the fourth reflector, the polarization beam splitter, and the positive lens corresponding to the right - eye display are arranged on the third bracket.

[0010] The first bracket can only move relative to the fixing plate in the vertical direction, while the second bracket and the third bracket do not move vertically relative to the fixing plate, thereby adjusting the visual difference between the first display optical path and the second display optical path in each dual - optical - path electronic display system.

[0011] Preferably, the second bracket and the third bracket move towards or away from each other in the horizontal direction to adjust the distance between the exit pupil positions of the two dual - optical - path electronic display systems.

[0012] Preferably, an upper limit part, a positioning part, and a lower limit part are arranged from top to bottom in the middle of the side of the fixing plate facing the human eye; the first bracket can only move up and down relative to the fixing plate under the restriction of the positioning part, and the upper limit part and the lower limit part are used to limit the up - and - down movement of the first bracket.

[0013] Preferably, the first bracket includes a rectangular frame and a set of mounting brackets respectively arranged on the left and right sides of the rectangular frame; the set of mounting brackets is used to mount the second reflector and the third reflector.

[0014] An adjusting screw is arranged on the upper or lower side of the first bracket, including a knob, a connecting rod, and a threaded rod; a bushing is arranged outside the connecting rod, and the connecting rod can only rotate within the bushing; the bushing is fixed to the fixing plate; the threaded rod is screwed to the first bracket; by rotating the knob, the adjusting screw rotates within the bushing and drives the first bracket to achieve vertical movement.

[0015] Preferably, the first bracket is formed in a "well" shape by two horizontal beams and two vertical beams, wherein the upper edges of the two vertical beams form an upper groove, and the lower edges of the two vertical beams form a lower groove; the left bracket and the right bracket of the two horizontal beams respectively form a group of mounting brackets corresponding to the two dual-optical path electronic display systems.

[0016] Preferably, the second bracket and the third bracket have the same structure, and the second bracket and the third bracket respectively include a lens mounting frame, a lens cover and a first reflector mounting frame, the polarization splitter and the fourth reflector are arranged inside the lens mounting frame, the lens cover sets the positive lens on the lens mounting frame, the lens mounting frame and the first reflector mounting frame are fixedly connected, and the first reflector is fixedly set on the first reflector mounting frame.

[0017] Preferably, two horizontal guide rails are arranged in parallel on the side of the fixing plate facing the human eyes;

[0018] The upper ends and lower ends of the second bracket and the third bracket are respectively fixedly provided with sliding parts that can slide along the guide rail.

[0019] Preferably, a gear is fixedly provided on the middle part of the surface of the fixing plate facing the human eye;

[0020] A first rack is provided on a side of the second bracket close to the third bracket;

[0021] The third bracket is provided with a second rack on one side close to the second bracket;

[0022] The first rack and the second rack are respectively meshed with the gear from upper and lower sides.

[0023] Preferably, the second bracket or the third bracket is connected to the driving part so that the second bracket or the third bracket moves horizontally, and the relative movement or opposite movement of the second bracket and the third bracket is realized through the transmission action of the gear, the first rack and the second rack.

[0024] Preferably, the gear extends out from the rectangular frame and meshes with the first rack and the second rack.

[0025] Preferably, the electronic reversal camera further comprises a display screen fixedly arranged on the side of the fixed plate away from human eyes, wherein the display screen has two display areas on the left and right sides, respectively corresponding to image sources of the dual-optical path electronic display system for left-eye display and right-eye display;

[0026] Openings are respectively provided at positions of the fixing plate corresponding to the four display areas;

[0027] The first mirror and the third mirror in two double - optical - path electronic display systems are respectively arranged corresponding to four openings.

[0028] The utility model discloses an adjusting mechanism of an electronic flipper. The electronic flipper includes two double - optical - path electronic display systems. The electronic flipper further includes a fixing plate, a first bracket, a second bracket, and a third bracket. Among them, two second mirrors and two third mirrors corresponding to left - eye display and right - eye display are arranged on the first bracket. The first mirror, the fourth mirror, the polarization beam splitter, and the positive lens corresponding to left - eye display are arranged on the second bracket. The first mirror, the fourth mirror, the polarization beam splitter, and the positive lens corresponding to right - eye display are arranged on the third bracket. The first bracket can only move relative to the fixing plate in the vertical direction, and the second bracket and the third bracket do not move vertically relative to the fixing plate. The above - mentioned electronic flipper alternately displays two display optical paths by controlling the display screen, provides a stimulation training similar to that of a mechanical flipper for the eyes, and gives an opposite - direction stimulating effect to the ciliary muscle. By using this electronic control method of double - optical - path switching display to replace the mechanical switching of two different diopter lenses in the existing flipper, an accurate - control and silent - operation flipper training process is realized. Moreover, by moving the second mirror and the third mirror in the same direction, the difference in diopter corresponding to the two display optical paths can be changed, and the training intensity of the eyes can be adjusted. A large change in diopter difference can be achieved with a small displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three - dimensional structural schematic diagram of the electronic flipper provided by the utility model;

[0030] Figure 2 is a three - dimensional structural schematic diagram of the electronic flipper provided by the utility model;

[0031] Figure 3 is a schematic optical path diagram of the double - optical - path electronic display system in the electronic flipper;

[0032] Figure 4 is Figure 3 the schematic optical path diagram of the first display optical path in

[0033] Figure 5 is Figure 3 the schematic optical path diagram of the second display optical path in

[0034] Figure 6 is a structural schematic diagram of the adjusting mechanism of the electronic flipper;

[0035] Figure 7 is an exploded schematic diagram of the adjusting mechanism of the electronic flipper;

[0036] Figure 8It is a schematic structural diagram of the first bracket and the fixing plate in the flipper

[0037] Figure 9 It is a schematic diagram of the assembled state of the first bracket and the fixing plate

[0038] 1, Flipper; 2, Adjustable headband; 3, Left double-light-path electronic display system; 4, Right double-light-path electronic display system; 5, Switch button; 6, Diopter adjustment mechanism; 7, Interpupillary distance adjustment mechanism

[0039] 100, Double-light-path electronic display system; 101, First reflector; 102, Second reflector; 103, Polarizing beam splitter; 104, Fourth reflector; 105, Third reflector; 106, Positive lens; 107, First image source; 108, Second image source; 110, Exit pupil position

[0040] 200, First display light path; 300, Second display light path

[0041] 10, Fixing plate; 11, Opening; 111, Upper left opening; 112, Lower left opening; 113, Upper right opening; 114, Lower right opening; 12, Upper limit part; 13, Lower limit part; 14, Positioning part; 15, Gear; 16, Fixing frame; 17, Fixing base; 18, Fixing hole; 19, Guide rail

[0042] 20, First bracket; 21, Upper edge of the longitudinal beam; 22, Upper groove; 23, Lower edge of the longitudinal beam; 24, Lower groove; 25, Rectangular frame; 26, Threaded hole; 27, Reflector bracket; 271, Upper left bracket; 272, Lower left bracket; 273, Upper right bracket: 274, Lower right bracket

[0043] 30, Second bracket; 31, Lens mounting frame; 32, Lens cap; 33, Upper sliding part; 34, Lower sliding part; 35, Sliding hole; 36, First rack; 37, Paddle

[0044] 40; Third bracket; 41, Mounting frame; 42, Lens cap; 43, Upper sliding part; 44, Lower sliding part; 45, Sliding hole; 46, Second rack

[0045] 61, Knob; 62, Connecting rod; 63, Threaded rod; 64, Bush; 65, Cover plate Detailed implementation mode

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0049] As Figures 1 to 9 shown, the present invention discloses an adjustment mechanism for an eidophor, which is used to adjust the diopter difference between two display optical paths in the eidophor and can simultaneously achieve pupil distance adjustment.

[0050] As Figure 1 shown in the eidophor 1, a headband 2 with adjustable length is provided on its upper part; in the housing of the eidophor 1, there are two double-light-path electronic display systems (left double-light-path electronic display system 3 and right double-light-path electronic display system 4), corresponding to left-eye display and right-eye display respectively.

[0051] Among them, each dual-light-path electronic display system includes a first display light path, a second display light path, and a controller. The first display light path and the second display light path share a polarization beam splitter and a positive lens. The light rays of the two display light paths are incident on the polarization beam splitter from different directions. After combining the light through the polarization beam splitter and magnifying the image through the positive lens, they are incident on the same exit pupil position. The first distance from the first image source of the first display light path to the positive lens is different from the second distance from the second image source of the second display light path to the positive lens. The optical paths of the first display light path and the second display light path are different, and the virtual image distances of the formed virtual images are different. The controller is used to control the alternating display of the first display light path and the second display light path. The utility model realizes different virtual image distances through the dual-light-path system in cooperation with the electronic screen. The images formed by the two display light paths are the same as the images formed by placing a mechanical flipper and a card in front of the human eyes and switching different diopter lenses of the flipper. By controlling the alternating display of the two display light paths, a similar effect to eye training using a flipper can be achieved. Moreover, the invention realizes different virtual image distances through the dual-light-path system in cooperation with the electronic screen. By electronically controlling the switching of the two display light paths, the switching display of different virtual image distances can be realized without introducing a mechanical structure.

[0052] In addition, a diopter adjustment mechanism 6 and an interpupillary distance adjustment mechanism 7 are provided in the electronic flipper. Through the diopter adjustment mechanism 6, the diopter difference between the two light paths of the dual-light-path electronic display system can be adjusted, thereby adjusting the training intensity for the human eyes. And through the interpupillary distance adjustment mechanism 7, the distance between the left dual-light-path electronic display system 3 and the right dual-light-path electronic display system 4 is adjusted to adapt to different interpupillary distances of human eyes.

[0053] The left dual-light-path electronic display system 3 corresponding to the left eye and the right dual-light-path electronic display system 4 corresponding to the right eye use the same optical path principle as shown in Figure 3 shown. As shown in Figures 3 to 5 shown, the dual-light-path electronic display system 100 includes: a first display light path 200 and a second display light path 300. The two display light paths share a positive lens 106 and a polarization beam splitter 103, where the polarization beam splitter 103 is used as a light combining element for the two light paths. The light rays emitted by the image sources in the two display light paths are reflected by different reflectors and then incident on the polarization beam splitter 103 from two opposite directions. Among them, the first light ray of the first display light path 200 is reflected by the polarization beam splitter 103 and then incident on the positive lens 106. The second light ray of the second display light path 100 is reflected by the polarization beam splitter 103 and then incident on another reflector 4 and is reflected back to the polarization beam splitter 103. At the same time, the polarization state of the second light ray changes, and then it transmits through the polarization beam splitter 103 and the positive lens 106 and is incident on the same exit pupil position 110 to form an image together with the first light ray.

[0054] As shown in Figure 3 andFigure 4 As shown, the first display optical path 200 includes a first image source 107, a first reflector 101, a second reflector 102, a polarization beam splitter 103, and a positive lens 106 arranged in sequence from the image source to the exit pupil position. A polarization beam splitting film (PBS film) is attached to one side surface of the polarization beam splitter 103. The function of the polarization beam splitting film is to reflect the first linearly polarized light and transmit the second linearly polarized light, and the polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular. Hereinafter, taking the first linearly polarized light as the P light and the second linearly polarized light as the S light as an example for description.

[0055] Among them, the first image source 107 is used to provide the first linearly polarized light (P-type linearly polarized light); after the first linearly polarized light is reflected by the first reflector 101 and the second reflector 102 in sequence, it is deflected by 90°, shoots from the first direction to the polarization beam splitter 103, and after being reflected by the polarization beam splitter 103, it passes through the positive lens 106 and shoots to the exit pupil position 110.

[0056] As Figure 3 and Figure 5 As shown, the second display optical path 300 includes a second image source 108, a third reflector 105, the polarization beam splitter 103, a fourth reflector 104, the polarization beam splitter 103, and the positive lens 106 arranged in sequence from the image source to the exit pupil position. A phase retarder is provided between the polarization beam splitter 103 and the fourth reflector 104. For example: a phase retarder (QWP film, and the QWP film forms a 45° angle with the PBS film) is attached to one side surface of the polarization beam splitter 103.

[0057] The second image source 108 is used to provide the first circularly polarized light (left-handed circularly polarized light). After the first circularly polarized light is reflected by the third reflector 105, it is deflected by 90° and shoots from the second direction to the polarization beam splitter 103. The second direction is opposite to the first direction. The first circularly polarized light becomes the first linearly polarized light (P light) after passing through the phase retarder, and then is reflected by the polarization beam splitting film and becomes the first circularly polarized light (left-handed circularly polarized light) again after passing through the phase retarder and shoots to the fourth reflector 104. After being reflected by the fourth reflector 104, it becomes the second circularly polarized light and shoots to the polarization beam splitter 103. After passing through the phase retarder, it becomes the second linearly polarized light (S light), and then passes through the polarization beam splitting film and the positive lens 106 and shoots to the same exit pupil position 110 as the first display optical path.

[0058] In this dual-optical-path electronic display system, the optical paths of the first display optical path and the second display optical path are different. The virtual images formed by the first display optical path and the second display optical path correspond to the images formed by placing lenses with different diopters in front of the human eye for a fixed object. In this way, by alternately displaying the two display optical paths, the training of the ciliary muscles of the human eye is realized.

[0059] In this dual - optical - path electronic display system, the optical axis of the positive lens 106 is set corresponding to the visual axis. The polarization beam splitter 103 is arranged on the side of the positive lens 106 away from the human eye and forms an angle of 45° with the visual axis. The third mirror 105 and the second mirror 102 are respectively arranged on both sides of the polarization beam splitter 103, such as the upper and lower sides or the left and right sides. Among them, in the first display optical path, a first mirror 101 is also arranged, which is used to reflect the first light emitted by the first image source 107 to the surface of the second mirror 102, increasing the optical path of the first display optical path. The sum of the angle of the first mirror 101 relative to the optical axis and the angle of the second mirror 102 relative to the optical axis is equal to 45°. In the second display optical path, a fourth mirror 104 is arranged on the side of the polarization beam splitter 103 away from the human eye, which is used to realize the polarization state conversion of the second light reflected by the polarization beam splitter and increase the optical path of the second display optical path. In this embodiment, the first mirror 101 and the image source 107 are respectively located on both sides of the second mirror 102. The second mirror 102 and the third mirror 105 are approximately parallel, and the angle between the second mirror 102 and the third mirror 105 is equal to the inclination angle of the first mirror 101 relative to the optical axis.

[0060] In this embodiment, the first image source 107 and the second image source 108 can be implemented by the same display screen. For example, an LCD screen that emits P - type polarized light is used. Among them, the first image source 107 is the first area of the display screen, which is used to provide the first linearly polarized light, P - light. The second image source 108 is the second area of the display screen, and a phase retardation plate is arranged on the light - emitting surface of the second area, which is used to convert the first linearly polarized light (P - light) into the first circularly polarized light (left - hand circularly polarized light). The first image source 107 and the second image source 108 can also be implemented by the same display screen that emits natural light, such as an OLED or a Micro OLED display screen. By attaching different polarization composite films to different areas of the light - emitting surface of the screen, image sources with different polarizations are provided. Among them, the area of the first image source 107 and the second image source 108 lit at one time is preferably not less than 2mm * 5mm.

[0061] In this embodiment, only the positive lens 106 has optical power to achieve image magnification. The focal length range of the positive lens 106 is 30 - 50 mm, thereby achieving moderate magnification of the displayed image. The first mirror 101, the second mirror 102, the third mirror 105, and the fourth mirror 104 are all plane mirrors. Preferably, total reflection films are attached to the surfaces of the first mirror 101, the second mirror 102, the third mirror 105, and the fourth mirror 104. In the two display optical paths, the first distance between the first image source 107 and the positive lens 106 is different from the second distance between the second image source 108 and the positive lens 106, thereby forming virtual images on different focal planes with different virtual image distances.

[0062] The polarization beam splitter 103 is a plano - lens. A polarization beam splitting film PBS and a quarter - wave plate QWP are provided on the surface of the polarization beam splitter 103. The QWP film and the PBS film form an angle of 45°. Among them, the PBS film and the QWP film can be respectively provided on different surfaces of the polarization beam splitter 103 or the two are attached to the same surface of the polarization beam splitter 103 as a composite film. For example, the polarization beam splitting film can be provided on one surface S132 of the polarization beam splitter 103 facing the second mirror 102; the quarter - wave plate is provided on one surface S131 of the polarization beam splitter 103 facing the third mirror 105. Another example is that the polarization beam splitting film and the quarter - wave plate can be provided as a composite film on the same side surface (S131 or S132) of the polarization beam splitter, and the polarization beam splitting film is closer to the second mirror 102 and farther from the third mirror 105 than the quarter - wave plate.

[0063] The theoretical light efficiency values of the above two optical paths can both reach 100%, and the two light beams do not interfere with each other and can simultaneously form images at the human eye. The first display optical path 200 has a longer optical path, so a longer virtual image distance can be achieved. The second display optical path 300 has a shorter optical path and can achieve a shorter virtual image distance. When the human eye observes, by controlling the controller to separately light different areas of the display screen to display images of different optical paths, imaging stimuli corresponding to different virtual image distances can be achieved, achieving the function of exercising the ciliary muscle of the human eye and preventing and alleviating the occurrence of myopia.

[0064] The above - mentioned display switching process does not require mechanical lens movement. On the one hand, it can achieve silent and fast operation. On the other hand, during the switching process of the two display optical paths, the exit pupil centers of the two display optical paths always correspond to the visual axis. There is no need for a visual axis matching process between the human eye and the device, and the imaging is more accurate, and the training duration and effect can be better guaranteed.

[0065] In order to adjust the training intensity of the ciliary muscles of the human eye for the two display optical paths, the virtual image distances of the two optical paths can be adjusted simultaneously, or the virtual image distance of a single display optical path can be adjusted. By moving the second reflector 102 and the third reflector 105 in the same direction (for example, simultaneously moving upward in Figure 1 ), and combining the control of the controller over the lit area of the display screen, the above adjustments can be achieved.

[0066] The present utility model provides a diopter adjustment mechanism 6 provided in an electronic flip card to cause the second reflector 102 and the third reflector 105 located on opposite sides of the polarization beam splitter to move in position, so as to adjust the optical path difference between the first display optical path and the second display optical path. In order to meet the imaging requirements before and after the movement of the second reflector 102, the length of the first reflector 101 should be such that the first light rays after being reflected by the first reflector 101 before and after the movement of the second reflector 102 can both irradiate the surface of the second reflector 102. The above adjustment method can achieve a change in the virtual image distance of the two display optical paths, and moreover, with a relatively small amount of position movement of the reflectors in a single optical path, the synchronous increase in the training intensity of the two-way training of the human eye can be achieved, increasing the training intensity of the ciliary muscles.

[0067] Figures 6 to 9 The detailed structure of the diopter adjustment mechanism 6 is given. Specifically, a fixing plate 10 is provided inside the electronic flip card, and a first bracket 20, a second bracket 30, and a third bracket 40 are provided on the side of the fixing plate 10 facing the human eye; the second reflector 102 and the third reflector 105 in the two dual-optical-path electronic display systems are fixed to the first bracket 20, and the first bracket 20 can move up and down relative to the fixing plate 10; the positive lens 106, the polarization beam splitter 103, the first reflector 101, and the fourth reflector 104 in the left dual-optical-path electronic display system are provided on the second bracket 30; the positive lens 106, the polarization beam splitter 103, the first reflector 101, and the fourth reflector 104 in the right dual-optical-path electronic display system are provided on the third bracket 40; the second bracket 30 and the third bracket 40 do not move in the vertical direction; thus, in a single dual-optical-path electronic display system, by moving the first bracket 20 and the second reflector 102 and the third reflector 105 up and down relative to the fixedly arranged positive lens 106, the polarization beam splitter 103, the first reflector 101, and the fourth reflector 104, the optical path difference between the two display optical paths is changed, the diopter difference between the two optical paths is adjusted, and the training intensity of the human eye accommodation function is adjusted.

[0068] Meanwhile, Figures 6 to 9The detailed structure of the pupil distance adjustment mechanism 7 is also given. In this embodiment, the first bracket 20 does not move in the horizontal direction, and the second bracket 30 and the third bracket 40 can move left and right relative to the fixed plate, so as to achieve a moving-towards or moving-away movement; thus, in the two double-light-path electronic display systems, by moving the second bracket 30 and the third bracket 40 towards or away from each other, the distance between the exit pupil positions 110 of the two double-light-path electronic display systems is adjusted, and the pupil distance of the device is adjusted to adapt to different users.

[0069] See Figures 7 to 9 , a display screen 70 and a screen cover plate 71 are arranged on the side of the fixed plate 10 away from the human eye. The display screen 70 is used to provide the image sources of the two double-light-path electronic display systems simultaneously, with a total of four image sources, which are respectively realized through different display areas of the display screen 70. Two openings 11 arranged vertically are respectively arranged on the left side and the right side of the fixed plate 10: the upper left opening 111, the lower left opening 112, the upper right opening 113 and the lower right opening 114. The upper left opening 111 and the lower left opening 112 correspond to the left double-light-path electronic display system, and the upper right opening 113 and the lower right opening 114 correspond to the right double-light-path electronic display system; the lower left opening 112 is closer to the right side than the upper left opening 111, and the lower right opening 114 is closer to the left side than the upper right opening 113; and the sizes of the four openings 11 should adapt to the moving ranges of the first bracket 20, the second bracket 30 and the third bracket 40. The first reflector 101 and the third reflector 105 before and after movement should respectively be opposite to the same-side openings arranged on the fixed plate 10 to ensure the light transmission of the image sources.

[0070] An upper limit portion 12, a positioning portion 14 and a lower limit portion 13 are arranged from top to bottom in the middle of the side of the fixed plate 10 facing the human eye; the first bracket 20 includes a rectangular frame 25 and four reflector brackets 27. The rectangular frame 25 is used to cooperate with the positioning portion 14 (the buckle as shown in the figure) to arrange the first bracket 20 on the surface of the fixed plate 10 and limit the first bracket 20 to move only in the vertical direction; an upper groove 22 is formed on the upper side of the rectangular frame 25 to cooperate with the upper limit portion 12, which is used to limit the up and down movement of the first bracket 20 and limit the maximum distance of the upward movement of the first bracket 20; a lower groove 24 is formed on the lower side of the rectangular frame 25 to cooperate with the lower limit portion 13, which is used to limit the up and down movement of the first bracket 20 and limit the maximum distance of the downward movement of the first bracket 20.

[0071] Specifically, the first bracket 20 can be composed of two longitudinal beams and two cross beams to form a "well" shape. Among them, the central part where the two longitudinal beams and two cross beams intersect forms a rectangular frame 25. An upper groove 22 is formed between the upper edges 21 of the two longitudinal beams (the upper edges of the longitudinal beams exceeding the cross beams), and a lower groove 24 is formed between the lower edges 23 of the two longitudinal beams (the lower edges of the longitudinal beams exceeding the cross beams). The left brackets of the two cross beams exceeding the longitudinal beams are respectively the upper left bracket 271 and the lower left bracket 272 corresponding to the left double optical path electronic display system, which are used to install the second reflector 102 and the third reflector 105 of the left double optical path electronic display system. The right brackets of the two cross beams exceeding the longitudinal beams are respectively the upper right bracket 273 and the lower right bracket 274 corresponding to the right double optical path electronic display system, which are used to install the second reflector 102 and the third reflector 105 of the right double optical path electronic display system. The upper left bracket 271, the lower left bracket 272, the upper right bracket 273, and the lower right bracket 274 respectively correspond to the upper left opening 111, the lower left opening 112, the upper right opening 113, and the lower right opening 114. The first reflector 101 and the third reflector 105 before and after movement should respectively be opposite to the same-side openings provided on the fixing plate 10 to ensure the light transmission of the image source.

[0072] An adjusting screw is provided above the first bracket 20. The adjusting screw includes a knob 61, a connecting rod 62, and a threaded rod 63. A bushing 64 is sleeved outside the connecting rod 62, and the connecting rod 62 can only rotate within the bushing 64. The bushing 64 is installed on the upper limiting portion 12 through a cover plate 65, so that the adjusting screw can only perform a rotational movement within the bushing 64. A threaded hole 26 is provided on the cross beam of the rectangular frame 25, that is, a threaded hole 26 is provided at the central position of the cross beam. The threaded rod 63 of the adjusting screw penetrates into the threaded hole 26. By rotating the knob 61, the connecting rod 62 rotates within the bushing 64, and under the rotational action of the threaded rod 63, the first bracket 20 moves upward or downward.

[0073] The following combines Figure 6 and Figure 7 to introduce the pupil distance adjusting mechanism of the eFlipper. A gear 15 is provided in the middle of the fixing plate 10. The gear 15 is installed on the fixing plate 10 through a fixing bracket 16, and the gear 15 protrudes outward from the rectangular frame 25; it is used to mesh with the racks provided on the second bracket 30 and the third bracket 40, so as to realize the relative movement between the two brackets.

[0074] Two guide rails 19 are arranged in parallel on the side of the fixing plate 10 facing the human eye, and the two guide rails 19 are arranged vertically; two fixing bases 17 are respectively provided on the left and right sides of the fixing plate 10, and fixing holes 28 are provided in the fixing bases 17. The two ends of the guide rail 19 are respectively fixed to the fixing holes 28.

[0075] The second bracket 30 includes a lens mounting bracket 31, a lens cap 32, and a first mirror mounting bracket 34; a polarization mirror 103 and a fourth mirror 104 are disposed inside the lens mounting bracket 31; a lens cap 32 is disposed on the side of the second bracket 30 close to the human eye for mounting the positive lens 106 to the lens mounting bracket 31; an upper sliding portion 33 is disposed on the upper side of the second bracket, and the upper sliding portion 33 is fixedly connected to the lens mounting bracket 31. The upper sliding portion 33 is used to cooperate with the upper guide rail 19 to achieve horizontal sliding; a first mirror mounting bracket 34 is fixedly disposed on the lower side of the second bracket 30, and the first mirror mounting bracket 34 is fixedly connected to the lens mounting bracket 31. The first mirror 101 is fixedly disposed on the first mirror mounting bracket. The first mirror mounting bracket 34 is a lower sliding portion, and a sliding hole 35 is disposed in the lower sliding portion. The lower guide rail 19 passes through the sliding hole 35; thus, the second bracket 30 can slide left and right along the parallel guide rails 19.

[0076] The third bracket 40 has the same structure as the second bracket 30. The third bracket 40 includes a lens mounting bracket 41, inside which a polarization mirror 103 and a fourth mirror 104 are disposed; a lens cap 42 is disposed on the side of the third bracket 40 close to the human eye for mounting the positive lens 106 to the third bracket 40; an upper sliding portion 43 is disposed on the upper side of the third bracket for cooperating with the upper guide rail 19 to achieve horizontal sliding; a lower sliding portion 44 is disposed on the lower side of the third bracket 40. The lower sliding portion 44 is the mounting bracket of the first mirror 101, and a sliding hole 45 is disposed in the lower sliding portion 44. The lower guide rail 19 passes through the sliding hole 45; thus, the third bracket 40 can also slide left and right along the parallel guide rails 19.

[0077] A power mechanism for driving the movement of the bracket is disposed on the upper or lower part of the second bracket 30 or the third bracket 40. In this embodiment, a paddle 31 is used to manually adjust the interpupillary distance. The paddle 31 is connected to the second bracket 30 through a connecting member 36. The paddle 31 can also be disposed on the third bracket 40. Of course, the power mechanism for driving the second bracket 30 or the third bracket 40 can also be implemented using other structures. For example, an electric driving mechanism such as a motor screw can be used, which is not limited herein.

[0078] A first rack 36 is disposed on the side of the second bracket 30 close to the third bracket 40, and a second rack 46 is disposed on the side of the third bracket 40 close to the second bracket 30. The first rack 36 and the second rack 46 are respectively engaged with the gear 15 from the upper side and the lower side. In this embodiment, the positive lens 106 is disposed closer to the human eye relative to the mirror bracket 27; the first rack 36 and the second rack 46 extend from the outside of the rectangular frame 25 (closer to the human eye) to the position where the gear 15 is located and are engaged therewith. The up-and-down settings of the first rack 36 and the second rack 46 can be opposite to those shown in the figure, which does not affect the operation of the entire adjustment mechanism.

[0079] The present utility model also discloses a display control method for the above electronic flipper. The two double-light-path electronic display systems both include a first display light path, a second display light path, and a controller. Among them, in the same double-light-path electronic display system, the two display light paths respectively provide imaging light rays corresponding to different virtual image distances to the same exit pupil position through a shared light combining element; the controller controls the two image sources to achieve the alternate display of the first display light path and the second display light path, so as to alternately provide image displays corresponding to different virtual image distances to the outside. Specifically, the alternate display of the two display light paths can be achieved by controlling different regions of the display screen to alternately display images, so as to perform the stimulation training corresponding to the mechanical flipper and give opposite stimulating effects to the ciliary muscle; by using this electronic control method of double-light-path switching display to replace the mechanical switching of two different diopter lenses in the existing flipper, a flipper training process with fast switching, accurate control, and silent operation is realized.

[0080] Two double-light-path electronic display systems 3 and 4 are used to construct an eye training instrument. The two double-light-path electronic display systems respectively correspond to the left-eye display and the right-eye display. The two double-light-path electronic display systems can respectively use separate display screens as image sources, or can respectively provide image sources through different display regions of the same display screen. When the present utility model uses the same display screen for the two double-light-path electronic display systems 3 and 4, the two double-light-path electronic display systems are jointly controlled by the same controller, and the controller controls the corresponding display region to display an image according to the display sequence of a single light path in different display light paths. During the eye training process, by controlling the display of the two double-light-path electronic display systems, only the left eye can be displayed, only the right eye can be displayed, or both eyes can be displayed simultaneously. Of course, the control of the image source by the controller also requires synchronously adjusting the display regions of each image source after the diopter adjustment and pupil distance adjustment to ensure the display effect.

[0081] The above has described in detail an adjustment mechanism of an electronic flipper provided by the present utility model. For those of ordinary skill in the art, any obvious modification made without departing from the substantial content of the present utility model will constitute an infringement of the patent right of the present utility model and will bear corresponding legal responsibilities.

Claims

1. An electronic reversal beat adjustment mechanism, characterized in that: The electronic reversal camera comprises two dual-optical path electronic display systems, corresponding to left-eye display and right-eye display respectively; wherein each dual-optical path electronic display system comprises a first display optical path, a second display optical path and a controller, and the positions of virtual images formed by the first display optical path and the second display optical path are different; the controller is used to control the first display optical path and the second display optical path to display alternately; The first display optical path comprises a first image source, a first reflector, a second reflector, a polarization beam splitter and a positive lens arranged in sequence from the image source to the exit pupil direction; the second display optical path comprises a second image source, a third reflector, the polarization beam splitter, a fourth reflector, the polarization beam splitter and the positive lens arranged in sequence from the image source to the exit pupil direction, and a phase delay plate is provided between the polarization beam splitter and the fourth reflector; The electronic reversal camera also includes a fixing plate, a first bracket, a second bracket and a third bracket, wherein the second reflector and the third reflector in the two dual-light path electronic display systems are arranged on the first bracket, the first reflector, the fourth reflector, the polarization beam splitter and the positive lens corresponding to the left eye display are arranged on the second bracket, and the first reflector, the fourth reflector, the polarization beam splitter and the positive lens corresponding to the right eye display are arranged on the third bracket; The first bracket can only move in the vertical direction relative to the fixed plate, and the second bracket and the third bracket do not move in the vertical direction relative to the fixed plate, so as to adjust the visual difference between the first display optical path and the second display optical path in each dual-optical path electronic display system.

2. The electronic reversal beat adjustment mechanism according to claim 1, characterized in that: The second bracket and the third bracket move toward or away from each other in the horizontal direction to adjust the distance between the exit pupil positions of the two dual-optical path electronic display systems.

3. The electronic reversal beat adjustment mechanism according to claim 1, characterized in that: An upper limit portion, a positioning portion and a lower limit portion are arranged from top to bottom in the middle of the side of the fixing plate facing the human eye; the first bracket can only move up and down relative to the fixing plate under the restriction of the positioning portion, and the upper limit portion and the lower limit portion are used to limit the up and down movement of the first bracket.

4. The electronic reverse beat adjustment mechanism according to claim 1 or 3, characterized in that: The first bracket includes a rectangular frame and a group of mounting brackets respectively arranged on the left and right sides of the rectangular frame, and the group of mounting brackets is used to mount the second reflector and the third reflector; An adjusting screw is arranged on the upper side or the lower side of the first bracket, comprising a knob, a connecting rod and a threaded rod; a sleeve is arranged outside the connecting rod, and the connecting rod can only rotate in the sleeve; the sleeve is fixed to the fixing plate; the threaded rod is threadedly connected to the first bracket; By rotating the knob, the adjusting screw rotates in the shaft sleeve and drives the first bracket to move in the vertical direction.

5. The electronic reversal beat adjustment mechanism according to claim 4, characterized in that: The first bracket is formed in a "well" shape by two horizontal beams and two longitudinal beams, wherein the upper edges of the two longitudinal beams form an upper groove, and the lower edges of the two longitudinal beams form a lower groove; the left bracket and the right bracket of the two horizontal beams respectively form a group of mounting brackets corresponding to the two dual-optical path electronic display systems.

6. The electronic reversal beat adjustment mechanism according to claim 4, characterized in that: The second bracket and the third bracket have the same structure, and the second bracket and the third bracket respectively include a lens mounting frame, a lens cover and a first reflector mounting frame, the polarization splitter and the fourth reflector are arranged inside the lens mounting frame, the lens cover sets the positive lens on the lens mounting frame, the lens mounting frame and the first reflector mounting frame are fixedly connected, and the first reflector is fixedly arranged on the first reflector mounting frame.

7. The electronic reversal beat adjustment mechanism according to claim 4, characterized in that: Two horizontal guide rails are arranged in parallel on the side of the fixing plate facing the human eyes; The upper ends and lower ends of the second bracket and the third bracket are respectively fixedly provided with sliding parts that can slide along the guide rail.

8. The electronic reversal beat adjustment mechanism according to claim 7, characterized in that: A gear is fixedly arranged on the middle part of the surface of the fixing plate facing the human eye; A first rack is provided on a side of the second bracket close to the third bracket; The third bracket is provided with a second rack on one side close to the second bracket; The first rack and the second rack are respectively meshed with the gear from upper and lower sides; The second bracket or the third bracket is connected to the driving part so that the second bracket or the third bracket moves horizontally, and the relative movement or opposite movement of the second bracket and the third bracket is achieved through the transmission action of the gear, the first rack and the second rack.

9. The electronic reversal beat adjustment mechanism according to claim 8, characterized in that: The gear extends out of the rectangular frame and meshes with the first rack and the second rack.

10. The electronic reversal beat adjustment mechanism according to claim 4, characterized in that: The electronic reversal camera also includes a display screen fixedly arranged on the side of the fixed plate away from the human eye, wherein the display screen has two display areas on the left and right sides, respectively corresponding to the image sources of the dual-optical path electronic display system for left-eye display and right-eye display; Openings are respectively provided at positions of the fixing plate corresponding to the four display areas; The first reflector and the third reflector in the two dual-light path electronic display systems are respectively arranged corresponding to the four openings.

Images