Folding desktop telephoto reading and writing device

Abstract

The utility model discloses a kind of folding desktop far image reading and writing equipment, comprising: plane spectroscope, concave mirror, backplate, cover plate and damping pivot;Wherein, concave mirror is fixedly arranged on cover plate or backplate;Wherein, in working condition, cover plate can be rotated to the horizontal position perpendicular to backplate, concave mirror is kept in horizontal or vertical position in use condition;Plane spectroscope is obliquely arranged between cover plate and backplate in use condition;In non-use condition, plane spectroscope and cover plate can be rotated, until coinciding with backplate;Folding desktop far image reading and writing equipment is provided with fill light, for illuminating light to desktop.The above-mentioned folding desktop far image reading and writing equipment can realize the folding of entire equipment, and enhance far image imaging effect by setting fill light.

Description

[0001] This application is a divisional application of Chinese utility model patent application No. 202520176222.2, filed on January 27, 2025, entitled "Folding Desktop Remote Image Reading and Writing Device". Technical Field

[0002] This utility model relates to a foldable desktop remote image reading and writing device. Background Technology

[0003] 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.

[0004] Desktop distance vision reading and writing devices utilize optical means to extend the reading and writing distance from near-field to far-field imaging, and are primarily used in the field of myopia prevention and control among teenagers. To ensure a sufficiently large field of view, such as the ability to fully image an open A4-sized book, desktop distance vision reading and writing devices are relatively large, occupying significant desktop space. To reduce the size of desktop distance vision reading and writing devices when not in use, foldable desktop distance vision reading and writing devices are available. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a foldable desktop remote image reading and writing device.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] A foldable desktop far-viewing and writing device includes: a planar beam splitter, a concave reflector, a back plate, a cover plate, and a damping hinge. The concave reflector is fixedly mounted on the cover plate or the back plate. The back plate, the planar beam splitter, and the cover plate are rotatably connected via the damping hinge. In the working state, the cover plate can be rotated to a horizontal position perpendicular to the back plate, the concave reflector is held in a horizontal or vertical position, and the planar beam splitter is tilted between the cover plate and the back plate. In the non-use state, the planar beam splitter and the cover plate can be rotated to coincide with the back plate. The foldable desktop far-viewing and writing device is equipped with a supplementary light for illuminating the desktop.

[0008] Preferably, a control component is provided at the lower part of the back panel to control the fill light and adjust its brightness and color temperature.

[0009] Preferably, the supplementary light is located at the bottom of the planar beam splitter.

[0010] Preferably, the supplementary light is arranged in a stepped manner on the lower surface of the planar beam splitter to provide vertical illumination to the table when the planar beam splitter is in use at a 45° tilt angle.

[0011] Preferably, the supplementary light is located at the bottom of the back panel.

[0012] Preferably, a sensor is disposed on any one of the beam splitter, the back plate, or the cover plate.

[0013] Preferably, a display is also provided on the back plate for displaying any one of time, angle, virtual image distance, and defocus amount.

[0014] Preferably, an active light-emitting element or a passive light-emitting element is provided on the back plate or cover plate to emit light towards the exit pupil position.

[0015] Preferably, a contrast film or surface microstructure is provided on the surface of the planar beam splitter to reduce the contrast of the entire or local area of ​​the distant image.

[0016] Preferably, the damping shaft includes a main shaft and a back plate fixing frame, a cover plate fixing frame, and a plane beam splitter fixing frame respectively sleeved on the main shaft. The back plate fixing frame is fixedly connected to the main shaft. The cover plate fixing frame can rotate around the main shaft within a 90° range. The plane beam splitter fixing frame can rotate around the main shaft within a predetermined angle, where the predetermined angle is less than 90°. The cover plate, the back plate, and the plane beam splitter are respectively fixed to the cover plate fixing frame, the back plate fixing frame, and the plane beam splitter fixing frame.

[0017] Preferably, on the main shaft, the back plate fixing frame is located between the cover plate fixing frame and the planar beam splitter fixing frame;

[0018] The damping shaft also includes a plurality of shims sleeved on the main shaft and located between the cover plate fixing frame and the back plate fixing frame, and between the back plate fixing frame and the planar beam splitter fixing frame.

[0019] Preferably, the damping shaft further includes a shim, a first self-locking concave wheel, a first self-locking cam, a disc spring, a shim, and a locking nut disposed on the main shaft and located outside the cover plate fixing frame. The first self-locking concave wheel and the first self-locking cam are used to limit the rotation of the cover plate fixing frame to 90°.

[0020] Preferably, the damping shaft further includes a pad, a second self-locking concave wheel, a second self-locking cam, a disc spring, a pad, and a locking nut disposed on the main shaft and located outside the planar beam splitter fixture. The second self-locking concave wheel and the second self-locking cam are used to limit the rotation of the planar beam splitter fixture to a predetermined angle.

[0021] Preferably, the backplate fixing frame, the cover plate fixing frame, and the planar beam splitter fixing frame each include an L-shaped bracket composed of two connecting plates; the two connecting plates are perpendicular to each other, one of the connecting plates is perpendicular to the main shaft and has an extension portion extending toward the main shaft and sleeved on the main shaft, and the other connecting plate is parallel to the main shaft.

[0022] The foldable desktop remote image reading and writing device provided by this utility model uses a coaxial optical system to image the reflected light of the desktop and the objects placed on the desktop. In use, the concave reflector is in a horizontal or vertical position, and the planar beam splitter is tilted. The angle between the cover plate, the planar beam splitter and the back plate is adjusted by a damping pivot, so as to realize the folding of the entire device. At the same time, the remote image imaging effect is enhanced by setting a supplementary light. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the foldable desktop image reading and writing device provided by this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the damping shaft;

[0025] Figure 3 This is an exploded structural diagram of the damping shaft;

[0026] Figure 4 and Figure 5 This is a schematic diagram of the contrast film below the planar beam splitter. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] This utility model provides a foldable desktop image reading and writing device, comprising a coaxial optical path composed of a planar beam splitter and a concave reflector. The concave reflector reflects light from the desktop and objects on it, achieving image magnification and projection. The planar beam splitter folds the optical path, thus enabling magnified and projected desktop writing in a compact device, allowing for extended viewing at a distance. Furthermore, to reduce the size of the desktop image reading and writing device when not in use, a folding structure using a damping hinge is provided.

[0031] Specifically, such as Figure 1 As shown, a foldable desktop image reading and writing device includes: a bracket 1, a back plate 2, a planar beam splitter 3, a concave reflector, a cover plate 4, and a damping pivot 5; wherein, the bracket 1 is set on the desktop, the back plate 2 is connected to the bracket 1 and the distance between the back plate 2 and the desktop can be adjusted, and the back plate 2, the planar beam splitter 3, and the cover plate 4 are rotatably connected by the damping pivot 5.

[0032] like Figure 2 and Figure 3 As shown, the damping shaft 5 includes a main shaft 50 and a back plate fixing frame 51, a cover plate fixing frame 52, and a plane beam splitter fixing frame 53 respectively sleeved on the main shaft 50. The back plate fixing frame 51 is fixedly connected to the main shaft 50. The cover plate fixing frame 52 can rotate around the main shaft 50 within a 90° range. The cover plate fixing frame 53 can rotate around the main shaft 50 within a predetermined angle. The predetermined angle is less than 90° (e.g., 60°, 55°, or 45°).

[0033] In this foldable desktop image reading and writing device, one end of the cover plate 4, one end of the back plate 2, and the top of the planar beam splitter 3 are respectively fixed to the cover plate fixing frame 52, the back plate fixing frame 51, and the planar beam splitter fixing frame 53; the concave reflector is fixedly mounted on the cover plate 4 or the back plate 2, and the concave reflector is kept in a horizontal or vertical position when in use. Figure 1In this configuration, a concave reflector is fixedly mounted on the lower surface of the cover plate 4. In other embodiments, the concave reflector can also be fixedly mounted on the surface of the back plate 2 facing the exit pupil. The concave reflector can be fixedly mounted on either the cover plate 4 or the back plate 2 to achieve distant image formation for desktop writing. The planar beam splitter 3 is tilted between the cover plate 4 and the back plate 2 during use. Light reflected from the desktop and objects placed on it is directed towards the planar beam splitter 3 from below and then split. The light is then reflected by the concave reflector and split again by the planar beam splitter 3 before being directed towards the exit pupil, forming a distant image at a distance of at least 3 meters.

[0034] Specifically, the structure of the damping shaft is shown in [reference needed]. Figure 3 The damping shaft 5 includes a main shaft 50 and a back plate fixing frame 51, a cover plate fixing frame 52 and a plane beam splitter fixing frame 53 respectively sleeved on the main shaft 50.

[0035] In this configuration, on the main shaft 50, the backplate mounting bracket 51 is located between the cover plate mounting bracket 52 and the planar beam splitter mounting bracket 53. The backplate mounting bracket 51 is fixedly connected to the main shaft 50, and the cover plate mounting bracket 52 and the planar beam splitter mounting bracket 53 can rotate independently relative to the main shaft 50 and the backplate mounting bracket 51, respectively. Each of the backplate mounting bracket 51, the cover plate mounting bracket 52, and the planar beam splitter mounting bracket 53 includes an L-shaped bracket composed of two connecting plates, which are perpendicular to each other. One connecting plate is perpendicular to the main shaft 50 and has an extension extending from the connecting plate towards the main shaft 50 and fitted onto the main shaft 50. The other connecting plate is parallel to the main shaft. The other connecting plate of the backplate mounting bracket 51, the cover plate mounting bracket 52, and the planar beam splitter mounting bracket 53 is used to connect the damping shaft 5 to the backplate 2, the cover plate 4, and the planar beam splitter 3, respectively.

[0036] The damping shaft 5 also includes a plurality of shims 60 sleeved on the main shaft 50 and located between the cover plate fixing frame 51 and the back plate fixing frame 52, and between the back plate fixing frame 51 and the planar beam splitter fixing frame 53.

[0037] The side of the cover plate fixing bracket 52 facing the back plate fixing bracket 51 is considered the inner side. The damping shaft 5 also includes a washer 54, a first self-locking concave wheel 55, a first self-locking cam 56, a disc spring 57, a washer 58, and a locking nut 59, all mounted on the main shaft 50 and located outside the cover plate fixing bracket 52. When the cover plate 4 rotates, the cover plate fixing bracket 52 drives the first self-locking concave wheel 55 to rotate relative to the first self-locking cam 56. The first self-locking concave wheel 55 and the first self-locking cam 56 limit the rotation of the cover plate fixing bracket 52 to 90°, and the degree of tightening of the locking nut 59 controls the damping magnitude during cover plate rotation.

[0038] The side of the planar beam splitter mounting bracket 53 facing the backplate mounting bracket 51 is considered the inner side. The damping shaft also includes a washer 61, a second self-locking concave wheel 62, a second self-locking cam 63, a disc spring 64, a washer 65, and a locking nut 66, all mounted on the main shaft 50 and located outside the planar beam splitter mounting bracket 53. When the planar beam splitter 3 rotates, the planar beam splitter mounting bracket 53 drives the second self-locking concave wheel 62 to rotate relative to the second self-locking cam 63. The second self-locking concave wheel 62 and the second self-locking cam 63 limit the rotation of the planar beam splitter mounting bracket 53 to a predetermined angle, and the degree of tightening of the locking nut 66 controls the damping magnitude during the rotation of the planar beam splitter 3.

[0039] Therefore, in the working state, the cover plate 4 can be rotated to a horizontal position perpendicular to the back plate 2, and the plane beam splitter 3 can be rotated to an inclined position between the cover plate 4 and the back plate 2; while in the non-working state, both the cover plate 4 and the plane beam splitter 3 can be rotated to a vertical position that coincides with the back plate 2.

[0040] Simultaneously, the planar beam splitter 3 can maintain at least two positions with an angle between 30° and 60° with the concave reflector, thereby changing the angle between the light rays directed towards the exit pupil and the horizontal plane, thus changing the height of the exit pupil relative to the tabletop, and also changing the angle between the exit pupil plane and the horizontal plane. The at least two positions between 30° and 60° include a 45° position and at least one non-45° position, where the 45° position corresponds to the horizontal exit pupil usage state, and the non-45° position corresponds to an upward or downward tilted exit pupil. Preferably, in the working state, the angle between the planar beam splitter 3 and the back plate 1 varies between 35° and 55°. This avoids changes in the virtual image distance when adjusting the height of the exit pupil position, providing a constant virtual image distance for users of different heights and ensuring myopia control effectiveness.

[0041] To enhance imaging performance, a supplementary light is installed at the bottom of this foldable desktop image reader / writer. This supplementary light can be positioned at the bottom of the planar beam splitter 3 and / or the back panel 2 to illuminate the desktop. For example, the supplementary light can be arranged in a stepped configuration on the lower surface of the planar beam splitter 3 to provide uniform vertical illumination to the desktop when the planar beam splitter 3 is at a 45° tilt angle. A control unit is also located at the bottom of the back panel 2 to control the supplementary light, allowing adjustment of brightness and color temperature.

[0042] To visualize parameter information, this foldable desktop image reading and writing device also includes a sensor. By placing the sensor on any one of the planar beam splitter 3, the back plate 2, or the cover plate 4, the sensor can detect the angle between the planar beam splitter 3 and the concave reflector. Simultaneously, a display 10 can be installed on the back plate 2 to display information related to the device's usage status, such as time, angle, virtual image distance, and defocusing amount. The angle information can be the tilt angle of the planar beam splitter 3 relative to the back plate 2 or the cover plate 4, or the angle between the planar beam splitter 3 and the concave reflector.

[0043] The foldable desktop remote image reading and writing device provided by this utility model can also be a desktop remote image reading and writing device with defocusing function. For example, a second concave reflector is provided on the back plate 2 or the cover plate 4. The second concave reflector and the concave reflector are respectively provided on the back plate 2 and the cover plate 4. When in use, the second concave reflector and the concave reflector are kept perpendicular to each other. When not in use, the second concave reflector can be rotated to coincide with the concave reflector. In use, light reflected from the table and objects placed on it is directed from below to the planar beam splitter 3 and then split. A portion of the light is directed to the concave mirror, reflected by the concave mirror, and then split again by the planar beam splitter 3. This light then travels to the exit pupil and forms a distant image at a distance of at least 3 meters. The corresponding light enters the human eye and forms an image on the retina. The other portion of the light is directed to the second concave mirror, reflected by the second concave mirror, and then split again by the planar beam splitter. This light then travels to the exit pupil and forms an image at a distance further than the distant image. This image is a defocused image. The corresponding light enters the human eye and forms an image in front of the retina, providing a positive defocus stimulus, thereby achieving a defocus control effect.

[0044] To achieve peripheral defocus stimulation, in this embodiment, the second concave mirror is partially coated with a total reflection film, or a light-shielding plate is placed in front of the second concave mirror. The light-shielding plate is partially transparent, and the second concave mirror is partially blocked by the light-shielding plate, thus reflecting light at the periphery while not reflecting light in the center, forming a defocused image only at the periphery of the field of view. By adjusting the rotation angle of the planar beam splitter, the exit pupil position of the distant image path can be adjusted. At the same time, the position of the defocused image in the distant image will move, but this does not affect the defocusing effect and still has an effect on myopia prevention and control.

[0045] The foldable desktop far-image reading and writing device provided by this utility model can also be a desktop far-image reading and writing device with contrast control function. For example, by setting active or passive light-emitting elements on the back plate 2 or cover plate 4, light is emitted towards the exit pupil, thereby forming a brightening spot in at least a local area of ​​the far image, reducing the contrast of the image in the area where the far image and the brightening spot overlap, so as to achieve contrast regulation in the local area of ​​the far image and reduce stimulation to the retina. Alternatively, a contrast film or surface microstructure can be set on the lower surface of the planar beam splitter 3 to reduce the contrast of the entire or local area of ​​the far image. The contrast film can use an anti-glare protective film (AG film), which scatters light through a micro-uneven structure or special coating on its surface. The structure of the contrast film is as follows... Figure 4 or Figure 5 As shown, the film can be a complete planar film covering the entire surface of the planar beam splitter 3, or it can be a film with a blank area in the middle, covering only the peripheral area of ​​the planar beam splitter 3. When light passes through the lower surface of the planar beam splitter 3, the presence or absence of the contrast-free film will adjust the contrast of different imaging areas passing through the planar beam splitter 3, ultimately achieving the effect of reducing the contrast of the peripheral field of view. In addition, glass etching, imprinting, or transfer processes can be used to etch, imprint, or transfer different patterns on the peripheral area of ​​the lower surface of the planar beam splitter 3. By slightly changing the transmittance of local areas of the planar beam splitter 3, the effect of clear central field of view and reduced contrast of peripheral field of view can be achieved.

[0046] The foregoing has provided a detailed description of the foldable desktop image reading and writing device 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 foldable desktop image reading and writing device, characterized in that, include: The device comprises a planar beam splitter, a concave reflector, a back plate, a cover plate, and a damping hinge. The concave reflector is fixedly mounted on the cover plate or the back plate. The back plate, the planar beam splitter, and the cover plate are rotatably connected via the damping hinge. In operation, the cover plate can be rotated to a horizontal position perpendicular to the back plate, the concave reflector is held in a horizontal or vertical position, and the planar beam splitter is tilted between the cover plate and the back plate. In non-use mode, the planar beam splitter and the cover plate can be rotated to coincide with the back plate. The folding desktop image reading and writing device is equipped with a supplementary light to illuminate the desktop.

2. The foldable desktop image reading and writing device as described in claim 1, characterized in that: A control unit is located at the bottom of the back panel to control the fill light and adjust its brightness and color temperature.

3. The foldable desktop image reading and writing device as described in claim 1, characterized in that: The supplementary light is located at the bottom of the planar beam splitter.

4. The foldable desktop image reading and writing device as described in claim 1, characterized in that: The supplementary lights are arranged in a stepped manner on the lower surface of the planar beam splitter to provide vertical illumination to the desktop when the planar beam splitter is in use at a 45° tilt angle.

5. The foldable desktop image reading and writing device as described in claim 1 or 4, characterized in that: The fill light is located at the bottom of the back panel.

6. The foldable desktop image reading and writing device as described in claim 5, characterized in that: A sensor is disposed on any one of the beam splitter, the back plate, or the cover plate.

7. The foldable desktop image reading and writing device as described in claim 5, characterized in that: A display is also provided on the back panel to display any one of time, angle, virtual image distance, and defocus amount.

8. The foldable desktop image reading and writing device as described in claim 5, characterized in that: Active or passive light-emitting elements are installed on the back plate or cover plate to emit light towards the exit pupil.

9. The foldable desktop image reading and writing device as described in claim 5, characterized in that: A contrast coating or surface microstructure is applied to the surface of a planar beam splitter to reduce the contrast of the entire or local area of ​​the distant image.

10. The foldable desktop image reading and writing device according to any one of claims 1-4, characterized in that: The damping shaft includes a main shaft and a back plate fixing frame, a cover plate fixing frame, and a plane beam splitter fixing frame respectively sleeved on the main shaft. The back plate fixing frame is fixedly connected to the main shaft. The cover plate fixing frame can rotate around the main shaft within a 90° range. The plane beam splitter fixing frame can rotate around the main shaft within a predetermined angle, which is less than 90°. The cover plate, the back plate, and the plane beam splitter are respectively fixed to the cover plate fixing frame, the back plate fixing frame, and the plane beam splitter fixing frame.

11. The foldable desktop image reading and writing device as described in claim 10, characterized in that: On the main shaft, the back plate mounting bracket is located between the cover plate mounting bracket and the planar beam splitter mounting bracket; The damping shaft also includes a plurality of shims sleeved on the main shaft and located between the cover plate fixing frame and the back plate fixing frame, and between the back plate fixing frame and the planar beam splitter fixing frame.

12. The foldable desktop image reading and writing device as described in claim 11, characterized in that: The damping shaft also includes a shim, a first self-locking concave wheel, a first self-locking cam, a disc spring, a shim, and a locking nut, which are disposed on the main shaft and located outside the cover plate fixing frame. The first self-locking concave wheel and the first self-locking cam are used to limit the rotation of the cover plate fixing frame to 90°.

13. The foldable desktop image reading and writing device as described in claim 12, characterized in that: The damping shaft also includes a shim, a second self-locking concave wheel, a second self-locking cam, a disc spring, a shim, and a locking nut, which are disposed on the main shaft and located outside the planar beam splitter fixture. The second self-locking concave wheel and the second self-locking cam are used to limit the rotation of the planar beam splitter fixture to a predetermined angle.

14. The foldable desktop image reading and writing device as described in claim 10, characterized in that: The backplate fixing frame, the cover plate fixing frame, and the planar beam splitter fixing frame each include an L-shaped bracket composed of two connecting plates; the two connecting plates are perpendicular to each other, one of the connecting plates is perpendicular to the main shaft and has an extension portion extending toward the main shaft and sleeved on the main shaft, and the other connecting plate is parallel to the main shaft.

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