Desktop far image read-write device with light blocking structure

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; the shell is placed on a desktop through the support, a desktop area used for placing books is arranged below the shell, light reflected by the books placed on the desktop area 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 at least 3 meters away from the exit pupil position is formed. And the light blocking structure is arranged on the front side of the shell, is lower than the position of the window, and is arranged between the exit pupil position and the desktop area so as to prevent light from irradiating to the exit pupil position from the desktop area. According to the desktop far image read-write device, by arranging the light blocking structure, a user can be effectively prevented from directly reading a book placed on the desktop in the using process, and stray light reflected by the desktop area is prevented from directly entering eyes to affect imaging.

Description

TECHNICAL FIELD

[0001] The utility model relates to a desktop far image reading and writing equipment. BACKGROUND

[0002] At present, the myopia problem of teenagers is increasingly serious, and the fundamental reason is that the eyes of teenagers focus on a relatively close range most of the time, and the eye axis gradually becomes longer to adapt to close-range imaging. In order to solve this problem, various myopia prevention and control products have emerged in the market.

[0003] Among them, the desktop far image reading and writing equipment is a device that uses optical means to zoom in on close-range reading and writing to form an image at a distance. It is mainly used in the field of myopia prevention and control for teenagers. The desktop far image reading and writing equipment usually has a viewing window facing the user. When in use, the desktop far image reading and writing equipment is placed above the desktop by a support. The area of the desktop below the desktop far image reading and writing equipment is used to place books. The light reflected by the books placed on the desktop enters the desktop far image reading and writing equipment from below. After being reflected and magnified by the optical magnification system inside the desktop far image reading and writing equipment, the light passes through the viewing window glass and is projected to the user's eye, forming a virtual image that is magnified and projected at a distance. In this way, close-range reading and writing is converted into long-distance imaging.

[0004] However, during the use of the desktop far image reading and writing equipment, the user may intentionally or unintentionally pay attention to the books placed on the desktop, which may affect the user's formation of good distance-vision using habits and reduce the user experience and use effect. In addition, the reflected light from the desktop area below the desktop far image reading and writing equipment entering the eye may also affect the imaging. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a desktop far image reading and writing equipment with a light-blocking structure.

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

[0007] A desktop far image reading and writing equipment with a light-blocking structure comprises:

[0008] An outer shell is provided with an optical magnification system inside and a viewing window on the front side. When in use, the outer shell is placed above the desktop by a support. The area of the desktop below the outer shell is used to place books. The light reflected by the books placed on the desktop area enters from the bottom of the outer shell and passes through the optical magnification system before being projected to the exit pupil position from the viewing window, forming a virtual image at a distance of at least 3 meters from the exit pupil position.

[0009] A light-blocking structure is provided on the front side of the outer shell and below the viewing window. It is also provided between the exit pupil position and the desktop area below the outer shell to prevent light from the desktop area from being projected to the exit pupil position.

[0010] wherein preferably the light-blocking structure is fixedly or movably connected to the lower part of the front side of the housing.

[0011] wherein preferably the light-blocking structure is in a horizontal or vertical position in use.

[0012] wherein preferably the light-blocking structure has a reflectivity of less than 5% when in a vertical position in use.

[0013] wherein preferably the light-blocking structure is made of a rigid plate-like material having a width in the range of 8cm to 15cm.

[0014] wherein preferably the plate-like material is rotatably connected to the lower part of the front side of the housing.

[0015] wherein preferably the tabletop far-reading and writing device comprises a damping shaft, the two ends of which are connected to the lower part of the front side of the housing and the plate-like material respectively.

[0016] wherein preferably the plate-like material has a protruding part, and the lower part of the front side of the housing is provided with a groove to accommodate the damping shaft and the protruding part of the plate-like material, one end of the damping shaft being fixed in the groove and the other end being connected to the protruding part.

[0017] wherein preferably the housing comprises a bottom frame, and the lower part of the front side of the housing is the front end of the bottom frame.

[0018] wherein preferably the two sides of the plate-like material are arc-shaped, and the shape of the plate-like material is the same as that of the bottom of the housing so as to fit the bottom of the housing in non-use.

[0019] wherein preferably the light-blocking structure is made of a flexible sheet-like material, and the length of the sheet-like material hanging from the bottom of the housing is not less than 12cm.

[0020] wherein preferably the length of the sheet-like material hanging from the bottom of the housing is in the range of 12cm to 30cm.

[0021] wherein preferably the sheet-like material is provided with a plurality of through holes near the upper end to expose part of the front side of the housing when the sheet-like material is connected to the housing.

[0022] wherein preferably the housing comprises a side plate, and the inner surface of the side plate has a reflectivity of less than 5%.

[0023] wherein preferably the inner surface of the side plate is non-specular and black in color.

[0024] Preferably, the optical amplification system comprises at least one concave mirror and a plane beamsplitter, the plane beamsplitter is arranged inside the housing and forms the view window, and the concave mirror is arranged horizontally and / or vertically facing the plane beamsplitter.

[0025] The desktop far image reading and writing equipment provided by the utility model sets the light blocking structure at the lower part of the front side of the shell, blocks the light rays from the desktop area below the shell to the pupil position, can effectively prevent the user from directly reading the books placed on the desktop in the use process, thereby ensuring that the user continuously watches the far image in the use process instead of directly reading the books at close range, and the light blocking structure also has a blocking effect on the environmental light rays reflected from the desktop area, thereby improving the use experience of the user and ensuring the myopia prevention and control effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a use state schematic diagram of the desktop far image reading and writing equipment of embodiment 1;

[0027] Figure 2 is a non-use state schematic diagram of the desktop far image reading and writing equipment of embodiment 1;

[0028] Figure 3 is Figure 1 a light blocking principle diagram of the desktop far image reading and writing equipment shown in the figure;

[0029] Figure 4 is a structure schematic diagram of the light blocking plate and the shell;

[0030] Figure 5 is an exploded structure schematic diagram of the light blocking plate and the shell;

[0031] Figure 6 is a structure schematic diagram of the desktop far image reading and writing equipment of embodiment 2. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0034] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0035] Embodiment 1

[0036] As shown in the desktop telephoto reading and writing device 1 shown in Figure 1 and Figure 2 , in use, is arranged on the desktop through the support 2, the desktop area 3 for placing books below the desktop telephoto reading and writing device 1, the desktop telephoto reading and writing device 1 includes a shell, and a light blocking structure is arranged on the front side of the shell, the light blocking structure is used to block the light from the desktop area 3 below the desktop telephoto reading and writing device 1 to the exit pupil position 4 on the front side of the shell, thereby avoiding the possibility of direct viewing of the desktop area 3 from the front side of the shell by the human eye, and also preventing the reflected light of the desktop area 3 from directly entering the human eye, reducing the influence of environmental stray light on imaging.

[0037] The structure shown in Figure 1 、 Figure 2 and the light blocking principle shown in Figure 3 will be described in detail below. The desktop telephoto reading and writing device 1 comprises: a shell 11, an optical magnification system and a light blocking structure; the optical magnification system is arranged in the interior of the shell 11, and a viewing window 15 is arranged on the front side of the shell 11, the light reflected by the book placed on the desktop area is incident from the bottom of the shell 11, and after being magnified and projected by the optical magnification system, it is shot to the exit pupil position 4 from the viewing window 15, forming a virtual image at a distance of at least 3 meters from the exit pupil position; the light blocking structure is arranged on the front side of the shell 11 and below the viewing window 15, and is arranged between the exit pupil position 4 and the desktop area 3 below the shell 11, so as to prevent the light from the desktop area 3 from being obliquely shot to the exit pupil position 4.

[0038] In this embodiment, the housing 11 includes a top cover, a rear panel, a bottom frame 13, an upper front cover, a lower front cover 12, and two side panels 14. An illumination element 20 is provided on the bottom frame 13 to provide illumination to the desktop area 3, and multiple buttons 18 are provided on the lower front cover 12 for controlling the illumination element 20. The reflectivity of the inner surfaces 17 of the two side panels 14 is 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 11 not covered by the optical magnification system elements should be black to further reduce stray light reflected from the inner walls.

[0039] like 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 concave reflector 32 and a planar beam splitter 31. The planar beam splitter 31 is obliquely disposed inside the housing 11 and forms a viewing window 15. The first concave reflector 32 is horizontally (or vertically) positioned facing the planar beam splitter 31. Light reflected from the tabletop area 3 is directed from below to the planar beam splitter 31. After being split by the planar beam splitter 31, only a portion of the light is directed to the first concave reflector 32. The light reflected by the first concave reflector 32 is then directed back to the planar beam splitter 31 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 concave mirror 33 and a plane beam splitter 31. The second concave mirror 33 is vertically (or horizontally) positioned facing the plane beam splitter 31. The first concave mirror 32 and the second concave mirror 33 are respectively positioned on opposite sides of the plane beam splitter. Light reflected from the tabletop area 3 is directed from below to the plane beam splitter 31. After being split by the plane beam splitter 31, only a portion of the light is directed to the second concave mirror 33. The light reflected by the second concave mirror 33 is directed back to the plane beam splitter 31 and then to the exit pupil position 4. Upon entering the eye, a defocused image is formed in front of the retina. The optical parameters of the first concave mirror 32 and the second concave mirror 33 are different, or their distances to the plane beam splitter 31 are different. The optical magnification system may also include only the distant image optical path.

[0040] In this embodiment, the light-blocking structure uses a rigid plate-like material 16, the width of which is preferably between 8cm and 15cm, and the plate-like material 16 is fixedly connected to the lower part of the front side of the outer casing 11. Specifically, as Figure 4 and Figure 5As shown, the plate-shaped material 16 is rotatably connected to the lower part of the front side of the housing 11 by a damping shaft 19, the lower part of the front side of the housing 11 is the front end of the bottom frame 13, the plate-shaped material 16 has two protruding parts 21, and a downward groove 22 is arranged at the front end of the bottom frame 13 to accommodate the damping shaft 19 and the protruding parts 21 of the plate-shaped material, one end of the damping shaft 19 is fixed in the groove 22, and the other end is connected with the protruding parts 21, and the rotation of the damping shaft 19 within an angle of at least 180° can realize the hovering of the plate-shaped material 16 at any angle. As shown in Figure 1 and Figure 2 As shown, the light blocking structure is in a horizontal position in the use state, and can be rotated to below the bottom frame 13 and coincide with the bottom frame 13 in the non-use state. 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 that of the bottom of the housing 11, so as to fit the bottom of the housing 11 in the non-use state.

[0041] In order to reduce the stray light caused by the light reflected by the plate-shaped material 16, the plate-shaped material 16 uses a non-mirror material and has a reflectivity of less than 5%, for example, a black plate is used as the light blocking structure.

[0042] Embodiment 2

[0043] Referring to Figure 6 As shown, the desktop telephoto reading and writing device 1 is arranged above the desktop by the support 2, and the desktop area for placing books is below the desktop telephoto reading and writing device 1; the desktop telephoto reading and writing device 1 comprises a housing 11, an optical magnification system and a light blocking structure; the optical magnification system is arranged in the interior of the housing 11, and a viewing window 15 is arranged on the front side of the housing 11, the light reflected by the book placed on the desktop area is incident from the bottom of the housing 11, and after being magnified and telephoto by the optical magnification system, the light is emitted from the viewing window 15 to the exit pupil position 4, forming a virtual image at a distance of at least 3 meters from the exit pupil position; the light blocking structure is arranged at a position lower than the viewing window 15 on the front side of the housing 11, and is arranged between the exit pupil position 4 and the desktop area 3 below the housing 11, so as to prevent the light from the desktop area 3 from being obliquely emitted to the exit pupil position 4.

[0044] In this embodiment, the housing 11 and the optical magnification system arranged in the interior of the housing 11 are the same as those in Embodiment 1, and will not be described here.

[0045] In this embodiment, the light blocking structure adopts a flexible sheet-shaped material 25, and the sheet-shaped material 25 is fixedly connected or movably connected to the lower part of the front side of the housing 11, for example, the upper end of the sheet-shaped material 25 is pasted or magnetically attracted to the lower front cover 12 of the front side of the housing 11. The connection position of the sheet-shaped material 25 should be lower than the viewing window 15.

[0046] As a preferred embodiment, the upper part of the sheet material 25 is provided with a plurality of through holes 26 near the upper end, so as to expose a part of the front side of the shell 11 when the sheet material 25 is connected to the shell 11, for example, to expose the buttons 18, sensors or indicator lights provided on the lower front cover 12.

[0047] The light-blocking structure adopts a flexible sheet material 25, which is in a vertical position and blocks the light from the desktop area 3 below the shell 11 to the exit pupil position 4 when in use. The length of the sheet material 25 hanging from the bottom of the shell 11 is at least 12 cm, and preferably ranges from 12 cm to 30 cm.

[0048] In order to reduce the stray light caused by the light reflected by the sheet material 25, the sheet material 25 uses a non-mirror material with a reflectivity of less than 5%, such as black velvet or leather as the light-blocking structure.

[0049] The above describes the use of flexible and rigid materials for the light-blocking structure, wherein the rigid material is fixedly connected to the shell, and the flexible material is fixedly or movably connected to the shell. It can be understood that the rigid material can also be movably connected to the existing desktop telephoto device to achieve the light-blocking effect.

[0050] In summary, the desktop telephoto reading and writing device provided by the present application blocks the light from the desktop area below the shell to the exit pupil position by providing a light-blocking structure on the lower part of the front side of the shell, which can effectively prevent the user from directly reading the book placed on the desktop during use, thereby ensuring that the user continuously watches the telephoto during use, rather than directly reading the book at close range. In addition, it can prevent the reflected light from the desktop area from directly entering the eye and affecting the imaging, thereby improving the user's experience and ensuring the myopia prevention effect.

[0051] The desktop telephoto reading and writing device with a light-blocking structure provided by the present application has been described in detail above. For those skilled in the art, any obvious modification made without departing from the essential content of the present application will constitute an infringement of the patent rights of the present application and will bear the corresponding legal responsibility.

Claims

1. A desktop telecentric read-write apparatus having light-blocking structures, characterized by It comprises: a housing, in which an optical magnification system is arranged, and a window is arranged on the front side of the housing; the housing is arranged above a desktop by a support in use, and a desktop area for placing books is arranged below the housing, the light reflected by the books placed on the desktop area is emitted from the bottom of the housing, passes through the optical magnification system, and is emitted from the window to an exit pupil position, forming a virtual image at a distance of at least 3 meters from the exit pupil position; and a light blocking structure arranged on the front side of the housing and below the window, and arranged between the exit pupil position and the desktop area below the housing, to prevent light from the desktop area from being emitted to the exit pupil position.

2. The desktop far reading and writing device according to claim 1, wherein: the light blocking structure is fixedly or movably connected with the lower part of the front side of the housing.

3. The desktop far reading and writing device according to claim 2, wherein: the light blocking structure is in a horizontal position or a vertical position in use.

4. The desktop far reading and writing device according to claim 3, wherein: the reflectivity of the light blocking structure is less than 5% when the light blocking structure is in the vertical position in use.

5. The desktop far reading and writing device according to claim 2, wherein: the light blocking structure is made of a rigid plate-shaped material, and the width of the plate-shaped material ranges from 8 cm to 15 cm.

6. The desktop far reading and writing device according to claim 5, wherein: the plate-shaped material is rotatably connected with the lower part of the front side of the housing.

7. The desktop far reading and writing device according to claim 5, wherein: the desktop far reading and writing device comprises a damping shaft, and the two ends of the damping shaft are respectively connected with the lower part of the front side of the housing and the plate-shaped material.

8. The desktop far reading and writing device according to claim 7, wherein: the lower part of the front side of the housing is provided with a groove for accommodating a protruding part of the damping shaft and the plate-shaped material, and one end of the damping shaft is fixed in the groove and the other end is connected with the protruding part.

9. The desktop far reading and writing device according to claim 8, wherein: the housing comprises a bottom frame, and the lower part of the front side of the housing is the front end of the bottom frame.

10. The desktop far reading and writing device according to claim 6, wherein: the two sides of the plate-shaped material are arc-shaped, and the shape of the plate-shaped material is the same as the shape of the bottom of the housing, so as to fit the bottom of the housing in a non-use state.

11. The desktop far reading and writing device according to claim 2, wherein: the light blocking structure is made of a flexible sheet-shaped material, and the length of the sheet-shaped material hanging from the bottom of the housing is not less than 12 cm.

12. The desktop far reading and writing device according to claim 11, wherein: the length of the sheet-shaped material hanging from the bottom of the housing ranges from 12 cm to 30 cm.

13. The desktop far reading and writing device according to claim 11, wherein: a plurality of through holes are arranged on the upper end of the sheet-shaped material, so as to expose part of the front side of the housing when the sheet-shaped material is connected with the housing.

14. The desktop far field read-write apparatus of claim 2, wherein: the housing includes a side panel having an inner surface with a reflectivity of less than 5%.

15. The desktop far field read-write apparatus of claim 14, wherein: the inner surface of the side panel is non-specular and black in color.

16. The desktop far field read-write apparatus of claim 2, wherein: the optical magnification system includes at least one concave mirror and a planar beamsplitter, the planar beamsplitter being disposed within the housing and forming the viewing window, the concave mirror being disposed horizontally and / or vertically facing the planar beamsplitter.

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