Desktop far image read-write device with camera

Abstract

The utility model discloses a desktop remote image read-write device with a light blocking structure, comprising a housing, an optical amplification system arranged in the housing, and a window arranged on the front side of the housing; when in use, the shell is arranged above a table top through the support, light from the direction of the table top enters from the bottom of the shell, passes through the optical amplification system and then enters the exit pupil position from the window, and a virtual image which is at least 3 meters away from the exit pupil position is formed. And the camera is connected with the shell and faces the exit pupil position, and the image acquisition range of the camera takes the exit pupil position as the center and at least can cover the range corresponding to the human face located at the exit pupil position. According to the desktop remote image read-write device, the camera is arranged on the side, facing the exit pupil position, of the shell, the sitting posture of a user is recorded and reminded, the use behavior of the user is known and supervised, and the use behavior of the user is standardized so that the use effect of the desktop remote image read-write device can be guaranteed.

Description

Technical Field

[0001] This utility model relates to a desktop remote image reading and writing device. Background Technology

[0002] The problem of myopia among teenagers is becoming increasingly serious. The root cause is that teenagers' eyes spend most of their time focusing on close-up objects, causing their eyeballs to gradually lengthen in order to adapt to near-field imaging. To address this issue, various myopia prevention and control products have emerged on the market.

[0003] Desktop far-image reading and writing devices utilize optical means to transform near-distance reading and writing into distant imaging, and are widely used in the field of myopia prevention and control among teenagers. These devices typically have a user-facing window and are mounted on a stand on a desktop. Below the device is the area on the desktop where the book is placed. Light reflected from the book enters the device from below, is magnified by the internal optical magnification system, and then shines through the window onto the user's eye, creating a magnified, distant virtual image, thus transforming near-distance reading and writing into distant imaging. Currently, further improvements are needed to enable necessary reminders and tracking of the user's posture in desktop far-image reading and writing devices. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a desktop remote image reading and writing device with a camera.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] A desktop image reading and writing device with a camera, comprising:

[0007] The housing contains an optical magnification system inside and a viewing window on its front side. In use, the housing is mounted on a tabletop via a bracket. Light from the tabletop enters from the bottom of the housing, passes through the optical magnification system, and then exits through the viewing window towards the exit pupil, forming a virtual image at least 3 meters away from the exit pupil.

[0008] The camera is connected to the housing and is positioned facing the exit pupil. The camera's image acquisition range is centered on the exit pupil and can at least cover the area corresponding to the face located at the exit pupil.

[0009] Preferably, the camera is mounted on the upper or lower front shell of the housing.

[0010] Alternatively, preferably, the camera is tilted inside the housing facing the exit pupil position and is located above the viewing window.

[0011] Preferably, the optical magnification system includes at least one reflector and a planar beam splitter, the planar beam splitter being obliquely disposed inside the housing and forming the viewing window, the camera being located above the top of the planar beam splitter, and the reflector being horizontally and / or vertically disposed.

[0012] Preferably, the pitch angle α of the camera is greater than half of the vertical field of view β of the camera.

[0013] Preferably, the camera has an image acquisition range of at least ±15° and no greater than ±20°.

[0014] Preferably, a light-shielding plate is provided below the horizontally positioned reflector. The light-shielding plate is not planar, and the camera is located below the light-shielding plate. The light-shielding plate is replaceable.

[0015] Preferably, the upper front shell of the housing is detachably disposed above the window and is used to block the insertion position of the light shield.

[0016] Preferably, the desktop image reading and writing device further includes a light-blocking structure, which is disposed on the front side of the housing and below the viewing window, and is located between the exit pupil position and the desktop area located below the housing, so as to prevent light from shining from the desktop area to the exit pupil position.

[0017] Preferably, the light-blocking structure is fixedly or movably connected to the lower part of the front side of the housing; the light-blocking structure is made of a rigid plate material or a flexible sheet material.

[0018] The desktop far-vision reading and writing device provided by this utility model records and reminds the user of their sitting posture by setting a camera on the side of the housing facing the exit pupil, thereby understanding and supervising the user's usage behavior and standardizing the user's usage behavior to ensure the effectiveness of the desktop far-vision reading and writing device and achieve myopia prevention and control. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a desktop image reading and writing device;

[0020] Figure 2 This is a schematic diagram of the optical path of a desktop image reader / writer.

[0021] Figure 3 This is a partial cross-sectional schematic diagram of a desktop image reading and writing device;

[0022] Figure 4 This is another structural diagram of a desktop image reading and writing device. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] like Figures 1 to 3 The desktop image reading and writing device 1 shown is set on a desktop via a bracket 2 during use. Below the desktop image reading and writing device 1 is a desktop area 3 for placing books. The desktop image reading and writing device 1 includes a housing 10, an optical magnification system is set inside the housing 10, and a viewing window 15 is set on the front side of the housing 10. During use, the housing is set above the desktop via the bracket 2. Light from the desktop direction enters from the bottom of the housing 10, passes through the optical magnification system, and is projected from the viewing window 15 to the exit pupil position 4, forming a virtual image at least 3 meters away from the exit pupil position. And, a camera 20 is connected to the housing 10 and set facing the exit pupil position 4. The image acquisition range of the camera 20 is centered on the exit pupil position 4 and can at least cover the range corresponding to the face located at the exit pupil position.

[0027] The housing 10 includes a top cover 11, a rear panel, a bottom frame 13, an upper front shell 19, a lower front shell 12, and two side panels 14. The bottom frame 13 has an opening for light from the desktop direction to enter from below, and an illumination element is mounted on the bottom frame 13 to illuminate the desktop area 3. Multiple buttons 18 are mounted on the lower front shell 12 for controlling the illumination element 20. The inner surfaces 17 of the two side panels 14 have a reflectivity of less than 5% to reduce stray light reflected from the inner walls. Preferably, the inner surfaces 17 of the side panels 14 are non-mirror and black, so that even if a small amount of light is reflected, it is only scattered rather than directional. Ideally, all other areas inside the housing 10 not covered by optical elements should be black to further reduce stray light reflected from the inner walls.

[0028] An optical magnification system is installed inside the housing 10, such as Figure 3 As shown, in this embodiment, the optical magnification system includes a distant image optical path and a defocus optical path. The distant image optical path includes a first reflecting mirror 22 and a plane beam splitter 21. The plane beam splitter 21 is obliquely disposed inside the housing 10 and forms a viewing window 15. The first reflecting mirror 22 is horizontally (or vertically) positioned facing the plane beam splitter 21. Light reflected from the tabletop area 3 is directed from below to the plane beam splitter 21. After being split by the plane beam splitter 21, only a portion of the light is directed to the first reflecting mirror 22. The light reflected by the first reflecting mirror 22 is then directed back to the plane beam splitter 21 and then to the exit pupil position 4. After entering the human eye, a normal distant image is formed on the retina. The distance from this distant image to the exit pupil position 4 is no less than 3 meters. The defocused optical path includes a second reflecting mirror 23 and a plane beam splitter 21. The second reflecting mirror 23 is vertically (or horizontally) positioned facing the plane beam splitter 21. The first reflecting mirror 22 and the second reflecting mirror 23 are respectively positioned on opposite sides of the plane beam splitter. Light reflected from the tabletop area 3 strikes the plane beam splitter 21 from below. After being split by the plane beam splitter 21, only a portion of the light strikes the second reflecting mirror 23. The light reflected by the second reflecting mirror 23 strikes the plane beam splitter 21 again and then passes through the plane beam splitter 21 to the exit pupil position 4. After entering the eye, a defocused image is formed in front of the retina. The first reflecting mirror 22 and the second reflecting mirror 23 can be any of the following: spherical mirror, aspherical mirror, freeform mirror, or Fresnel mirror. The optical parameters of the first reflecting mirror 22 and the second reflecting mirror 23 may differ, or their distances from the plane beam splitter 21 may differ. The optical magnification system may also include only the distant image optical path.

[0029] The camera 20 can be located on the front side of the housing 10, specifically the upper front housing 19 or the lower front housing 12, or it can be located inside the housing 10 and facing the exit pupil position.

[0030] Considering the image capture effect of the camera, the camera 20 is positioned inside the housing 10 at a slightly upper rear side. The camera 20 is tilted inside the housing 10 facing the exit pupil, and is located above the viewing window 15 (i.e., the planar beam splitter 21) and below the horizontally positioned reflector (if present). The acquisition range of the camera 20 corresponds to the area between the lower edge of the viewing window 15 and the upper front housing 19.

[0031] like Figure 2 As shown, when the horizontally positioned reflector 23 is a defocus reflector, a light-shielding plate 24 is provided on the front side (i.e., below) of the reflector 23. The light-shielding plate 24 is used to partially block the reflected light from the reflector 23, thereby forming a defocus pattern through the light in the light-transmitting area. The light-shielding plate 24 is not planar; preferably, it is a curved light-shielding plate concave to the planar beam splitter 21. The camera 20 is located below the light-shielding plate 24 and above the planar beam splitter 21. The light-shielding plate 24 is replaceable. By replacing it with a light-shielding plate 24 with different light-transmitting patterns, different defocus images are formed in the defocused light path, thereby enhancing the myopia prevention and control effect. The upper front shell 19 of the housing 10 is detachably disposed above the viewing window 15, and the upper front shell 19 is used to block the insertion position of the light-shielding plate 24.

[0032] like Figure 3 As shown, the camera 20 is mounted downwards inside the housing 10, and the pitch angle α of the camera 20 (i.e., the angle between the center line BO of the camera 20 and the horizontal plane AO) is greater than half of the vertical field of view β of the camera 20. For example, the camera is positioned at a pitch angle of approximately 25° on the rear side inside the housing 10, ensuring that the camera 20 has an image acquisition range of at least ±15° and no greater than ±20°.

[0033] In addition, a light-blocking structure is provided on the front side of the housing 10. The light-blocking structure is used to block the light from the desktop area 3 below the desktop image reading and writing device 1 from shining obliquely towards the exit pupil position 4 on the front side of the housing, thereby preventing the human eye from directly looking at the desktop area 3 from the front side of the housing. At the same time, it can also prevent the reflected light from the desktop area 3 from directly entering the human eye, reducing the impact of ambient stray light on imaging.

[0034] Specifically, the light-blocking structure is located on the front side of the housing 10 and below the viewing window 15, and is positioned between the exit pupil position 4 and the desktop area 3 located below the housing 10, to prevent light from obliquely shining from the desktop area 3 onto the exit pupil position 4.

[0035] like Figure 1 and Figure 3 As shown, the light-blocking structure can be made of a rigid plate-like material 16, the width of which is preferably 8cm to 15cm, and the plate-like material 16 is fixedly connected to the lower part of the front side of the housing 10. Figure 1 and Figure 3 As shown, the plate-shaped material 16 is rotatably connected to the lower front part of the housing 10 via a damping shaft. The lower front part of the housing 10 is preferably the front end of the bottom frame 13. The plate-shaped material 16 has two protrusions, and a groove is provided at the front end of the bottom frame 13 to accommodate the damping shaft and the protrusions of the plate-shaped material. One end of the damping shaft is fixed in the groove, and the other end is connected to the protrusion. Rotating the damping shaft within an angle not exceeding 180° allows the plate-shaped material 16 to be suspended at any angle. This light-blocking structure is horizontal in use and can rotate to lie below and overlap with the bottom frame 13 when not in use. Preferably, the two sides of the plate-shaped material 16 are arc-shaped, and the shape of the plate-shaped material 16 is the same as the shape of the bottom of the housing 10, so that it fits against the bottom of the housing 10 when not in use.

[0036] To reduce stray light caused by light reflected from the plate material 16, the plate material 16 is made of a non-mirror material with a reflectivity of less than 5%, for example, a black plate material is used as a light-blocking structure.

[0037] like Figure 4 As shown, the light-blocking structure can also use a flexible sheet material 25, and the sheet material 25 is fixedly or movably connected to the lower part of the front side of the housing 10. For example, the upper end of the sheet material 25 is pasted or magnetically attached to the lower front shell 12 on the front side of the housing 10. The connection position of the sheet material 25 should be lower than the viewing window 15.

[0038] In a preferred embodiment, the upper part of the sheet material 25 near the upper end may also be provided with a plurality of through holes 26 to expose a portion of the front side of the housing 10 when the sheet material 25 is connected to the housing 10, for example, to expose buttons 18, sensors or indicator lights provided on the lower front housing 12.

[0039] The light-blocking structure uses a flexible sheet material 25. In use, the sheet material 25 hangs down in a vertical position to block light from the tabletop area 3 located below the housing 10 towards the exit pupil position 4. The length of the sheet material 25 hanging down from the bottom of the housing 10 is at least 12cm, preferably in the range of 12cm to 30cm.

[0040] To reduce stray light caused by light reflected from the sheet material 25, the sheet material 25 is made of a non-mirror material with a reflectivity of less than 5%, such as black velvet or leather as a light-blocking structure.

[0041] The above examples illustrate the use of flexible and rigid materials in light-blocking structures. The rigid material is fixedly connected to the shell, while the flexible material is either fixedly or movably connected to the shell. It can be understood that the rigid material can also be movably connected and attached to an existing desktop imaging device to achieve the light-blocking effect.

[0042] In summary, the desktop remote image reading and writing device provided by this utility model records and reminds the user of their sitting posture by setting a camera on the side of the housing facing the exit pupil, thereby enabling the understanding and supervision of the user's usage behavior and standardizing the user's usage behavior to ensure the effectiveness of the desktop remote image reading and writing device.

[0043] The above provides a detailed description of a desktop image reading and writing device with a camera provided by this utility model. Any obvious modifications made by those skilled in the art without departing from the essential content of this utility model will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liability.

Claims

1. A desktop image reading and writing device with a camera, characterized in that... include: The housing contains an optical magnification system and a viewing window on the front side of the housing. When in use, the housing is mounted on a tabletop via a bracket. Light from the tabletop enters from the bottom of the housing and, after passing through the optical magnification system, is projected from the viewing window to the exit pupil, forming a virtual image at least 3 meters away from the exit pupil. and, The camera is connected to the housing and is positioned facing the exit pupil. The camera's image acquisition range is centered on the exit pupil and can at least cover the area corresponding to the face located at the exit pupil.

2. The desktop image reading and writing device as described in claim 1, characterized in that: The camera is mounted on the upper or lower front shell of the housing.

3. The desktop image reading and writing device as described in claim 1, characterized in that: The camera is tilted inside the housing, facing the exit pupil, and is located above the viewing window.

4. The desktop image reading and writing device as described in claim 3, characterized in that: The optical magnification system includes at least one reflector and a planar beam splitter. The planar beam splitter is obliquely disposed inside the housing and forms the viewing window. The camera is located above the top of the planar beam splitter. The reflector is horizontally and / or vertically disposed.

5. The desktop image reading and writing device as described in claim 4, characterized in that: A light-shielding plate is provided below a horizontally positioned reflector. The light-shielding plate is not flat, and the camera is located below the light-shielding plate. The light-shielding plate is replaceable.

6. The desktop image reading and writing device as described in claim 5, characterized in that: The upper front shell of the housing is detachably disposed above the viewing window and is used to block the insertion position of the light shield.

7. The desktop image reading and writing device as described in claim 3, 4, or 5, characterized in that: The camera's pitch angle α is greater than half of the camera's vertical field of view β.

8. The desktop image reading and writing device as described in claim 3, 4, or 5, characterized in that: The camera has an image acquisition range of at least ±15° and no greater than ±20°.

9. The desktop image reading and writing device as described in claim 2 or 3, characterized in that: It also includes a light-blocking structure, which is located on the front side of the housing and below the viewing window, and is positioned between the exit pupil position and the desktop area located below the housing, to prevent light from shining from the desktop area to the exit pupil position.

10. The desktop image reading and writing device as described in claim 9, characterized in that: The light-blocking structure is fixedly or movably connected to the lower part of the front side of the housing; the light-blocking structure is made of rigid plate material or flexible sheet material.

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