Passive remote image read-write device and device adjusting method

Abstract

The invention provides a passive remote image read-write device and a device adjusting method, and relates to the technical field of remote image optical screens, the device comprises a frame assembly, a hinge, an optical module and a rigid skeleton assembly, the frame assembly comprises a first frame body, a second frame body and a third frame body; the hinge is connected to the frame assembly; the optical module comprises a first lens, a second lens and an imaging panel which are arranged on the frame assembly, a passive mode is adopted, geometric multiple image amplification is carried out on a target reading object through reflection and diffusion of projected light, and the rigid framework assembly is connected to the frame assembly and serves as a stress part for supporting and unfolding. The rigid framework assembly comprises two telescopic framework pieces which are symmetrically arranged on the two sides of the frame assembly. The device integrates multiple functions such as folding, passive technology and far image display, realizes compact folding and portability of the device, has the characteristics of compact structure, convenience in carrying and wide application scene, and meanwhile, ensures the accuracy and high efficiency of amplified image display.

Description

Technical Field

[0001] The present application relates to the technical field of telescopic light screens, and in particular to a passive telescopic reading and writing device and a device adjustment method. Background Art

[0002] The telephoto screen is a myopia prevention and control technology based on optical design principles and free-form mirrors. It can transform close-up images into long-distance virtual images. Without changing the physical distance, it increases the eye distance, achieves magnified imaging, and avoids the occurrence of transient myopia induced by long-term close-up eye use, thereby delaying the occurrence and development of myopia. The telephoto technology can also adjust the flat reading surface to a vertical reading surface, which is conducive to improving the user's sitting posture; the market prospects for telephoto reading and writing devices based on the telephoto screen are broad.

[0003] In the related art, telescopic reading and writing devices usually need to use connecting wires to connect to signal sources, which are complicated to operate, rely on active signals, and may also cause signal delays; telescopic reading and writing devices are bulky and difficult to adapt to the needs of various occasions, especially in home learning scenarios. Existing telescopic reading and writing devices are inconvenient to use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application provides a passive telescopic reading and writing device and a device adjustment method, which solves the problem that the prior telescopic reading and writing devices rely on active signals, are complex to operate and bulky, causing inconvenience in the use and storage of the devices.

[0005] To achieve the above objectives, this application is implemented through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a passive telescopic reading and writing device, which includes a frame assembly, a hinge, an optical module and a rigid skeleton assembly.

[0007] Specifically, the frame assembly includes a first frame body, a second frame body and a third frame body arranged in sequence; a hinge is connected to the frame assembly so that the frame assembly can be folded and unfolded in a spatial coordinate system; the optical module includes a first lens, a second lens and an imaging panel arranged on the frame assembly, and adopts a passive mode and performs geometric multiple image magnification on the target reading material through reflection and diffusion of projected light, the first lens is a curved imaging lens and convex away from the second lens, and the second lens is a flat lens; the rigid skeleton assembly is connected to the frame assembly and serves as a force-bearing part supporting the unfolding, the rigid skeleton assembly includes two groups of retractable skeleton members, and the two groups of skeleton members are symmetrically arranged on both sides of the frame assembly.

[0008] According to the first aspect of the embodiment of the present application, the second lens and the imaging panel are used for light reflection and diffusion respectively; the second frame is clamped between the first frame and the third frame, and two adjacent frames among the first frame, the second frame and the third frame are pivotally connected by hinges.

[0009] According to the first aspect of the embodiment of the present application, the first lens, the second lens and the imaging panel are completely accommodated in the first frame, the second frame and the third frame along their own thickness direction to achieve spatial decoupling of the optical module.

[0010] According to the first aspect of the embodiment of the present application, one side of the first lens is coated with a first coating film, and the reflectivity R1 of the first coating film satisfies the expression: R1 ≥ 90%; one side of the second lens is coated with a second coating film, and the reflectivity R2 of the second coating film satisfies the expression: 17% ≤ R2 ≤ 27%.

[0011] According to the first aspect of the embodiment of the present application, the second frame is arranged at an adjustable first angular distance from one of the first frame and the third frame with the center of the hinge as the fixed point, and is distributed at an adjustable second angular distance from the other frame, and the first angular distance and the second angular distance are equal.

[0012] According to the first aspect of the embodiment of the present application, the frame assembly realizes switching between the unfolded state and the folded state under the telescopic cooperation of the two groups of frame members; in the process of switching the frame assembly from the unfolded state to the folded state, the two groups of frame members are forced to shrink and rotate and fold around the center of the hinge; in the unfolded state, the first frame body is orthogonal to the third frame body in the spatial coordinate system, and the first angular distance and the second angular distance are both 45°.

[0013] According to the first aspect of the embodiment of the present application, when the frame assembly is in the unfolded state, the target reading material is located at the lower side of the second frame along the first direction, and the first frame is arranged in parallel with the two-dimensional carrying surface corresponding to the target reading material; the first frame, the second frame and the third frame are in contact with each other along the second direction in the folded state.

[0014] According to a first aspect of the embodiment of the present application, the frame assembly is provided with grooves on two opposite sides along a third direction to provide accommodation space for the contraction of the frame members; each group of frame members includes two hydraulic rods, and the inner wall of the groove is connected to an intermediate member to be hinged with the end of the hydraulic rod.

[0015] According to the first aspect of the embodiment of the present application, the passive telescopic reading and writing device also includes a locking assembly, which includes a first lock and a second lock arranged in pairs, and the first lock and the second lock are respectively arranged on the sides of the first frame and the third frame; in the folded state, the first frame and the third frame can interfere with each other to constrain the extension and contraction of the two groups of frame members to limit the freedom of the frame assembly.

[0016] In a second aspect, an embodiment of the present application provides a device adjustment method, which includes: setting a passive telescopic reading and writing device on a preset target bracket, and adjusting the passive telescopic reading and writing device to a predetermined target posture; releasing the restrictions of the first lock and the second lock in the locking assembly, so that the four hydraulic rods corresponding to the two groups of frame members are extended to a predetermined length; placing the target reading object on a preset two-dimensional carrying surface, and the two-dimensional carrying surface is located on the lower side of the second lens of the passive telescopic reading and writing device; geometrically magnifying the image of the target reading object through reflection and diffusion of the projected light, so that the picture presented by the target reading object has a sense of distance, and imaging the magnified image on the imaging panel; after the use of the device is over, applying an external force to push the surface of the first frame so that the four hydraulic rods are forced to shrink to the original position, and locking the first lock and the second lock to achieve the folding of the passive telescopic reading and writing device.

[0017] According to the second aspect of the embodiment of the present application, after the target reading material is placed on the preset two-dimensional carrying surface, the device adjustment method also includes: verifying whether there is a deviation between the format extension direction corresponding to the first frame and the extension direction of the two-dimensional carrying surface; if there is a deviation, correcting the posture of the passive telescopic reading and writing device on the target bracket.

[0018] The present application provides a passive telescopic reading and writing device and a device adjustment method. Compared with the prior art, it has the following beneficial effects:

[0019] The passive telescopic reading and writing device proposed in the present application does not need to rely on active signals for image magnification. The frame assembly of the device consists of three parts, namely a first frame body, a second frame body and a third frame body, and these three parts are connected by hinges and can be rotated, unfolded and folded in space. Two groups of retractable skeleton members are provided as the force-bearing parts supporting the unfolding of the frame assembly. The two groups of skeleton members are symmetrically arranged on both sides of the frame assembly for linkage to ensure the stability of the folding and unfolding process. After the frame assembly is fully unfolded, the optical module magnifies the image of the target reading material by geometric multiples through the reflection and diffusion of the projected light. The magnified image is presented on the imaging panel, and the orientation of the reading surface can be adjusted to improve the user's sitting posture. The present application integrates multiple functions such as folding, passive technology and telescopic display, and has the characteristics of compact structure, easy to carry and wide application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic structural diagram of a passive telescopic reading and writing device in an unfolded state provided by an embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of a passive telescopic reading and writing device in a folded state provided by an embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of passive amplified imaging of an optical module of a passive telescopic reading and writing device provided in an embodiment of the present application;

[0024] Figure 4 It is an exemplary flow chart of a device adjustment method provided in an embodiment of the present application.

[0025] Figure markings: frame assembly 1; first frame body 11; second frame body 12; third frame body 13; hinge 2; optical module 3; first lens 31; second lens 32; imaging panel 33; rigid skeleton assembly 4; hydraulic rod 41; middle piece 42; locking assembly 5; first lock buckle 51; second lock buckle 52; projected light A; imaging size B; first direction X1; second direction X2; third direction X3. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] The embodiments of the present application provide a passive remote image reading and writing device and a device adjustment method, thereby solving the problem that the existing remote image reading and writing devices rely on active signals, are complex to operate and bulky, and thus are inconvenient to use and store.

[0029] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0030] Telescopic display technology allows users to see geometrically magnified images when they are at a certain distance from the viewing screen. The image is presented in a way that simulates the visible distance of real objects so that the picture presented by the reading body can have a sense of distance. This technology helps to reduce visual fatigue caused by long-term close-range eye use and protect eyesight. It can change "near" vision into "far" vision and reduce the rate of occurrence and development of myopia.

[0031] The telephoto screen is a myopia prevention and control technology based on optical design principles and free-form mirrors. It can transform close-up images into long-distance virtual images. Without changing the physical distance, it increases the eye distance, achieves magnified imaging, and avoids the occurrence of transient myopia induced by long-term close-up eye use, thereby delaying the occurrence and development of myopia. The telephoto technology can also adjust the flat reading surface to a vertical reading surface, which is conducive to improving the user's sitting posture; the market prospects for telephoto reading and writing devices based on the telephoto screen are broad.

[0032] In the related art, telescopic reading and writing devices usually need to use connecting wires to connect to signal sources, which are complicated to operate, rely on active signals, and may also cause signal delays. In addition, the devices are bulky and difficult to adapt to the needs of various occasions, especially in home learning scenarios. Existing telescopic reading and writing devices are inconvenient to use.

[0033] Based on this, there is an urgent need to propose a telescopic reading and writing device that is compact, easy to fold, and easy to operate, so as to achieve fast and accurate image reading and writing, which does not hurt the eyes and can prevent myopia and delay the occurrence and development of myopia.

[0034] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] The following first introduces a passive remote image reading and writing device provided in an embodiment of the present application.

[0036] The present application embodiment provides a passive telescopic reading and writing device, please refer to Figure 1 , Figure 2 and Figure 3The passive telescopic reading and writing device comprises a frame assembly 1, a hinge 2, an optical module 3 and a rigid skeleton assembly 4. Specifically, the frame assembly 1 comprises a first frame body 11, a second frame body 12 and a third frame body 13 arranged in sequence; the hinge 2 is connected to the frame assembly 1 so that the frame assembly 1 can be folded and unfolded in a spatial coordinate system; it can be understood that a hinge is also called a hinge, and a hinge can connect two or more objects and enable the connected objects to move in space; thus, under the connection of the hinge 2, the first frame body 11, the second frame body 12 and the third frame body 13 as components of the frame assembly 1 can be folded in space, thereby enabling the passive telescopic reading and writing device provided in the embodiment of the present application to be unfolded when in use, and folded after use to reduce the space occupied by the device, making it convenient to use and store in a home learning scenario.

[0037] For further information, please refer to Figure 3 , Figure 3 A schematic diagram of passive magnification imaging of an optical module of a passive telescopic reading and writing device provided in an embodiment of the present application is shown. The optical module 3 includes a first lens 31, a second lens 32 and an imaging panel 33 arranged on a frame assembly 1, and adopts a passive mode and performs geometric multiple image magnification on a target reading object through reflection and diffusion of projected light. The first lens 31 is a curved imaging lens and convexly moves away from the second lens 32, and the second lens 32 is a flat lens.

[0038] Please refer to Figure 1 The rigid skeleton component 4 is connected to the frame component 1 and serves as a force-bearing part for supporting the expansion. The rigid skeleton component 4 includes two sets of telescopic skeleton members, which are symmetrically arranged on both sides of the frame component 1. It can be understood that Figure 1 The figure shows a schematic diagram of the first side structure of a passive telescopic reading and writing device, wherein the passive telescopic reading and writing device extends to the second side along a third direction X3 in space. Figure 1 The perspective shown shows the first set of skeleton components, and the second set of skeleton components corresponds to the second side of the passive telescopic reading and writing device. Please refer to Figure 1 and Figure 2 The rigid skeleton component 4 is the internal skeleton of the frame component 1. The two groups of skeleton components can be synchronously linked under the action of force and pull the first frame body 11 and the second frame body 12 to rotate and shrink.

[0039] Based on this, the passive telescopic reading and writing device proposed in the present application does not need to rely on active signals for image magnification. The frame assembly 1 of the device is composed of three parts, namely a first frame body 11, a second frame body 12 and a third frame body 13, and these three parts are connected by hinges 2 and can be rotated, unfolded and folded in space. Two groups of retractable skeleton members are set as the force-bearing parts supporting the unfolding of the frame assembly 1. The two groups of skeleton members are symmetrically arranged on both sides of the frame assembly 1 for linkage to ensure the stability of the folding and unfolding process; after the frame assembly 1 is fully unfolded, the optical module 3 can geometrically magnify the image of the target reading material through reflection and diffusion of the projected light. The enlarged image is presented on the imaging panel 33, and the orientation of the reading surface can be adjusted to thereby improve the user's sitting posture, which is beneficial to delaying the occurrence and development of myopia.

[0040] It should be noted that this application integrates multiple functions such as folding, passive technology and telescopic display, and has the characteristics of compact structure, simple operation, easy to carry and store, and wide application scenarios. Through clever structural design, the compact folding and portability of the device are achieved, while ensuring the accuracy and efficiency of image reading and writing. This application can achieve visual images through the reflection and diffusion of light from the projected object, and can work without an external video signal source, which improves the convenience and flexibility of use; the passive design means that the device has a longer service life and can be used in scenes such as reading and writing without delay.

[0041] It should be emphasized that the present application uses an upper inverted structural design. After the passive telescopic reading and writing device is unfolded, the first lens 31 which is a curved imaging lens is located at the top of the device. The structural design of the device ensures that the first lens 31 is isolated from the heat source of the light, and the first lens 31 will not be deformed by heat due to the heat of the light source, thereby avoiding deformation of the observed image.

[0042] In one example, the first frame 11 , the second frame 12 , and the third frame 13 are all made of metal aluminum profiles. The first frame 11 , the second frame 12 , and the third frame 13 have high heat resistance and will not be deformed by external temperature changes.

[0043] In some embodiments, the second lens 32 and the imaging panel 33 are used for light reflection and diffusion, respectively. Figure 3 , Figure 3 The passive magnification imaging schematic diagram of the optical module of the passive telescopic reading and writing device is shown. After the projected light A passes through the second lens 32, it contacts the concave surface of the first lens 31 and is reflected into an enlarged and telescopic image. The light reflected by the first lens 31 contacts the second lens 32 again to reflect the light to the observation position. The image size B is as shown in FIG. Figure 3 shown.

[0044] It should also be noted that the reason why the human eye can see the full picture of an object is mainly due to the imaging of diffuse reflected light in the eye. If the human eye only receives all the light reflected in one direction from the surface of the object, not only will it not be able to see the appearance of the object clearly, it will also cause glare interference in a certain direction.

[0045] Based on this, the present application sets the imaging panel 33 for diffuse reflection. Diffuse reflection is the phenomenon that light projected on a rough surface is reflected in all directions. When a beam of parallel incident light hits a rough surface, the surface will reflect the light in all directions. Therefore, although the incident rays are parallel to each other, due to the inconsistency of the normal directions of each point, the reflected light is irregularly reflected in different directions. Each ray of diffuse reflection follows the law of reflection, and the parallel light beam is no longer a parallel light beam after diffuse reflection. When the passive telephoto reading and writing device is used at close range, the occurrence of hyperopic defocus in the peripheral retina can be avoided. The close-range image is converted into a long-range image through optical principles, thereby reducing imaging lag; compared with reading a paper book at close range for the same time, the choroid can be significantly thickened through telephoto processing.

[0046] In some embodiments, Figure 1 As shown, the second frame 12 is sandwiched between the first frame 11 and the third frame 13, and the adjacent two of the first frame 11, the second frame 12 and the third frame 13 are pivotally connected by hinges 2. It can be understood that the first frame 11 and the second frame 12 can be rotated in space to achieve folding, and achieve geometric multiple contraction. The passive telescopic reading and writing device can be easily stored when not in use, which greatly saves space; the thickness after folding is moderate, which is easy to carry and store, and suitable for different environments and space requirements.

[0047] In some embodiments, please refer to Figure 3 The first lens 31 , the second lens 32 and the imaging panel 33 are completely accommodated in the first frame 11 , the second frame 12 and the third frame 13 along their own thickness direction to achieve spatial decoupling of the optical module 3 .

[0048] In the embodiment of the present application, it can be understood that in order to ensure that the first frame 11, the second frame 12 and the third frame 13 can occupy a smaller space after being folded and shrunk, it is also necessary to ensure that the first lens 31, the second lens 32 and the imaging panel 33 will not contact each other during the folding process of the device to avoid lens wear.

[0049] Based on this, the first lens 31, the second lens 32 and the imaging panel 33 in the present application are completely accommodated in the first frame 11, the second frame 12 and the third frame 13 along their own thickness direction; in other words, the thickness of the first frame 11, the second frame 12 and the third frame 13 exceeds the thickness of the corresponding first lens 31, the second lens 32 and the imaging panel 33; the two sides of the first lens 31, the second lens 32 and the imaging panel 33 will not exceed the corresponding sides of the first frame 11, the second frame 12 and the third frame 13, thereby realizing the spatial decoupling of the optical module 3, providing a basis for the complete folding of the passive telescopic reading and writing device.

[0050] In some embodiments, one side of the first lens 31 is coated with a first coating film, and the reflectivity R1 of the first coating film satisfies the expression: R1 ≥ 90%; one side of the second lens 32 is coated with a second coating film, and the reflectivity R2 of the second coating film satisfies the expression: 17% ≤ R2 ≤ 27%.

[0051] Specifically, the first coating film can be an aluminum film with a thickness of 420nm-680nm, the mirror slope error of the first lens 31 is less than 6mrad, and both sides of the first lens 31 are chamfered. The first lens 31 needs to be inspected during the manufacturing process to ensure quality, and the inspection items include: effective area point defect inspection, effective area linear defect inspection, and point scratch and other whitening phenomenon inspection.

[0052] In the embodiment of the present application, it is understandable that the first coating film is provided on the first lens 31 and needs to have a higher reflectivity to meet the light reflection requirement. Figure 3 The second lens 32 is a planar beam splitting optical device. The projection light A needs to pass through the second lens 32 from bottom to top. Therefore, the second coating film on the lower side of the second lens 32 needs to have a higher transmittance and a lower reflectivity. The transmittance of the second coating film needs to reach 78%±5% to meet actual needs. The second lens 32 needs to be inspected for point defects in the effective area and linear defects in the effective area before being put into use.

[0053] In some embodiments, the frame assembly 1 is provided with grooves on opposite sides along the third direction X3 to provide accommodation space for the contraction of the frame members; each group of frame members includes two hydraulic rods 41, and the inner wall of the groove is connected with an intermediate member 42 to be hinged with the end of the hydraulic rod 41; wherein the third direction X3 is orthogonal to the two-dimensional plane defined by the first direction X1 and the second direction X2.

[0054] In the embodiment of the present application, it can be understood that during the folding process of the frame assembly 1, the hydraulic rod 41 is forced to contract, and the frame assembly 1 is folded around the hinge 2. After folding, the hydraulic rod 41 contracts and is hidden in the groove, thereby achieving complete folding of the first frame 11, the second frame 12 and the third frame 13.

[0055] In some embodiments, please refer to Figure 1 and Figure 2 The passive telescopic reading and writing device also includes a locking assembly 5, which includes a first lock buckle 51 and a second lock buckle 52 arranged in pairs, and the first lock buckle 51 and the second lock buckle 52 are respectively arranged on the sides of the first frame body 11 and the third frame body 13; in the folded state, the first frame body 11 and the third frame body 13 can interfere with each other to constrain the extension and contraction of the two sets of frame members to limit the degree of freedom of the frame assembly 1.

[0056] In the embodiments of the present application, it can be understood that the present application equips the passive telescopic reading and writing device with a convenient locking mechanism by setting a locking component 5, thereby ensuring that the device can remain stable when folded or unfolded; in addition, after releasing the mutual locking between the first lock buckle 51 and the second lock buckle 52, the frame member can automatically open to switch the passive telescopic reading and writing device from a folded state to an unfolded state.

[0057] In some embodiments, the second frame 12 is arranged at an adjustable first angular distance from one of the first frame 11 and the third frame 13 with the center of the hinge 2 as the fixed point, and is distributed at an adjustable second angular distance from the other frame, and the first angular distance and the second angular distance are equal.

[0058] In the embodiment of the present application, it can be understood that the second frame 12 is clamped between the first frame 11 and the third frame 13, and there is an angle of the first angular distance or the second angular distance between the second frame 12 and the first frame 11 and the third frame 13. Since the frame assembly 1 can be folded in space, the specific values ​​of the first angular distance and the second angular distance can be changed; further, since the folding of the frame assembly 1 depends on the synchronous and frequency action of the four hydraulic rods 41, the first angular distance and the second angular distance can still remain equal during the change process.

[0059] In some embodiments, please refer to Figure 1 and Figure 2 The frame assembly 1 realizes switching between the unfolded state and the folded state under the telescopic cooperation of the two sets of frame members; in the process of switching from the unfolded state to the folded state, the two sets of frame members are forced to shrink and rotate and fold around the center of the hinge 2; in the unfolded state, the first frame body 11 is orthogonal to the third frame body 13 in the spatial coordinate system, and the first angular distance and the second angular distance are both 45°.

[0060] In the embodiment of the present application, it can be understood that when the user adjusts the frame assembly 1 of the passive telescopic reading and writing device to the unfolded state, it can be used normally; at this time, the third frame 13 is in a vertical state, the first frame 11 is in a horizontal state, the second frame 12 is located in the middle position between the first frame 11 and the third frame 13 and is in an inclined state, and the first angular distance and the second angular distance are both 45°. In other words, the second frame 12 is tilted at 45° in the spatial coordinate system, and thus, the second lens 32 installed on the second frame 12 is also tilted at 45°.

[0061] Based on this, please refer to Figure 3 When a beam of projection light A contacts the first lens 31 on the first frame 11 after passing through the second lens 32 on the second frame 12, based on the specific curved surface angle of the first lens 31, while generating vertical reflected light, when the reflected light contacts the second lens 32 inclined at 45°, it can be reflected to generate light in the horizontal direction.

[0062] In some embodiments, please refer to Figure 1 When the frame assembly 1 is in the unfolded state, the target reading object is located at the lower side of the second frame 12 along the first direction X1, and the first frame 11 is arranged parallel to the two-dimensional carrying surface corresponding to the target reading object; wherein the first direction X1 corresponds to the vertical direction in the space coordinate system.

[0063] In the embodiment of the present application, it can be understood that the two-dimensional support surface is used to place the target reading material that needs to be magnified, and the target reading material is placed on the two-dimensional support surface at the lower side of the second frame 12, and the image reflected by the second lens 32 is displayed by the diffusion of the imaging panel 33. For example, when the passive telescopic reading and writing device provided in the embodiment of the present application is applied to a learning scene, the two-dimensional support surface can be a desktop, and the target reading material can be a book.

[0064] In some embodiments, please refer to Figure 2 In the folded state, the first frame body 11, the second frame body 12 and the third frame body 13 are in contact with each other along the second direction X2; wherein the second direction X2 corresponds to the horizontal direction in the space coordinate system.

[0065] In the embodiment of the present application, it can be understood that, based on the above description, on the one hand, since the first lens 31, the second lens 32 and the imaging panel 33 are completely accommodated in the first frame 11, the second frame 12 and the third frame 13 along their own thickness direction; on the other hand, since the four hydraulic rods 41 can be completely accommodated in the grooves on both sides of the aforementioned frame assembly 1; after the frame assembly 1 is folded, as shown in FIG. Figure 2 As shown, the first frame body 11, the second frame body 12 and the third frame body 13 can be connected without gap, thereby reducing the occupied space of the passive telescopic reading and writing device and facilitating storage.

[0066] In addition, an embodiment of the present application provides a device adjustment method, such as Figure 4 As shown, the device adjustment method may specifically include the following steps S110-S150:

[0067] S110, placing the passive remote image reading and writing device on a preset target bracket, and adjusting the passive remote image reading and writing device to a predetermined target posture;

[0068] S120, releasing the restrictions of the first lock buckle 51 and the second lock buckle 52 in the locking assembly 5, so that the four hydraulic rods 41 corresponding to the two groups of frame members are extended to a predetermined length;

[0069] S130, placing the target reading material on a preset two-dimensional carrying surface, wherein the two-dimensional carrying surface is located at the lower side of the second lens 32 of the passive telescopic reading and writing device;

[0070] S140, magnifying the target reading object by geometric multiples through reflection and diffusion of the projected light, so that the image presented by the target reading object has a sense of distance, and imaging the magnified image on the imaging panel 33;

[0071] S150, after the device is used, external force is applied to push the surface of the first frame 11 so that the four hydraulic rods 41 are forced to shrink to the original position, and the first lock buckle 51 and the second lock buckle 52 are locked to achieve the folding of the passive telescopic reading and writing device.

[0072] In the embodiment of the present application, it can be understood that the imaging panel 33 is a bottom plate of the passive telescopic reading and writing device, and the back of the imaging panel 33 away from the second lens 32 can be connected to a preset target bracket, and the passive telescopic reading and writing device can be suspended relative to the two-dimensional carrying surface along the first direction X1 and the suspended height is adjustable; after the passive telescopic reading and writing device is installed and the connection locking limit between the first lock buckle 51 and the second lock buckle 52 is contacted, the passive telescopic reading and writing device can be moved from the first direction X1 to the second direction X1 under the action of the four hydraulic rods 41. Figure 2 The folded state shown is gradually unfolded until it reaches Figure 1 In the unfolded state, the whole process is easy to operate. After the target reading object is placed on the two-dimensional carrying surface, remote image reading and writing can be achieved under the action of the optical module 3.

[0073] In some embodiments, after placing the target reading material on the preset two-dimensional carrying surface, that is, after the aforementioned S130, the device adjustment method may further specifically include:

[0074] S131, verifying whether there is a deviation between the extension direction of the width corresponding to the first frame 11 and the extension direction of the two-dimensional carrying surface;

[0075] S132. In the case of deviation, the posture of the passive telescopic reading and writing device on the target support is corrected.

[0076] In the embodiment of the present application, it can be understood that before the passive telescopic reading and writing device is used, it should be checked whether the device is in a predetermined target posture, and the format corresponding to the first frame 11 and the two-dimensional carrying surface should be parallel and parallel to the two-dimensional plane defined by the second direction X2 and the third direction X3; in order to achieve an ideal magnified imaging effect and ensure imaging quality.

[0077] In summary, compared with the prior art, this application has the following beneficial effects:

[0078] 1. The passive telescopic reading and writing device proposed in this application does not need to rely on active signals for image magnification. After the frame assembly is fully unfolded, the optical module geometrically magnifies the image of the target reading object through reflection and diffusion of the projected light. The magnified image is presented on the imaging panel, and the orientation of the reading surface can be adjusted to improve the user's sitting posture. When the passive telescopic reading and writing device is used at a close distance, the occurrence of hyperopic defocus in the peripheral retina can be avoided, and the close-range image is converted into a long-range image through optical principles, thereby reducing imaging lag.

[0079] 2. This application integrates multiple functions such as folding, passive technology and telescopic image display, and has the characteristics of compact structure, easy to carry and wide application scenarios; through ingenious structural design, the compact folding and portability of the device are achieved, while ensuring the accuracy and efficiency of the magnified image display.

[0080] 3. The first frame, the second frame and the third frame in the present application can be rotated, unfolded and folded in space through hinge connections. Two groups of retractable frame members are provided as the force-bearing parts supporting the unfolding of the frame assembly. The two groups of frame members are symmetrically arranged on both sides of the frame assembly for linkage to ensure the stability of the folding and unfolding process.

[0081] 4. The first lens, the second lens and the imaging panel in the present application are completely accommodated in the first frame, the second frame and the third frame along their own thickness direction; and the four hydraulic rods can be completely accommodated in the grooves on both sides of the frame assembly; after the frame assembly is folded, the first frame, the second frame and the third frame can be abutted without gaps, thereby reducing the occupied space of the passive telescopic reading and writing device.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A passive telescopic reading and writing device, characterized in that: include: A frame assembly (1) comprises a first frame body (11), a second frame body (12) and a third frame body (13) arranged in sequence; A hinge (2) connected to the frame assembly (1) so that the frame assembly (1) can be folded and unfolded in a spatial coordinate system; An optical module (3) comprising a first lens (31), a second lens (32) and an imaging panel (33) arranged on the frame assembly (1), and adopting a passive mode to geometrically magnify the image of a target reading object through reflection and diffusion of projected light, wherein the first lens (31) is a curved imaging lens and is convex away from the second lens (32), and the second lens (32) is a flat lens; and A rigid skeleton component (4) is connected to the frame component (1) and serves as a force-bearing part for supporting the expansion. The rigid skeleton component (4) comprises two groups of telescopic skeleton members, and the two groups of skeleton members are symmetrically arranged on both sides of the frame component (1).

2. The passive telescopic reading and writing device according to claim 1, characterized in that: The second lens (32) and the imaging panel (33) are used for light reflection and diffusion respectively; the second frame (12) is sandwiched between the first frame (11) and the third frame (13); and two adjacent ones of the first frame (11), the second frame (12) and the third frame (13) are pivotally connected via the hinge (2).

3. The passive telescopic reading and writing device according to claim 1, characterized in that: The first lens (31), the second lens (32) and the imaging panel (33) are completely accommodated in the first frame (11), the second frame (12) and the third frame (13) along their thickness direction to achieve spatial decoupling of the optical module (3); One side of the first lens (31) is coated with a first coating film, and the reflectivity R1 of the first coating film satisfies the expression: R1 ≥ 90%; one side of the second lens (32) is coated with a second coating film, and the reflectivity R2 of the second coating film satisfies the expression: 17% ≤ R2 ≤ 27%.

4. The passive telescopic reading and writing device according to any one of claims 1 to 3, characterized in that: The second frame (12) is arranged at an adjustable first angular distance from one of the first frame (11) and the third frame (13) with the center of the hinge (2) as a fixed point, and is arranged at an adjustable second angular distance from the other frame, and the first angular distance and the second angular distance are equal.

5. The passive telescopic reading and writing device as claimed in claim 4, characterized in that: The frame assembly (1) is capable of switching between an unfolded state and a folded state under the telescopic cooperation of the two sets of frame members; When the frame assembly (1) switches from the unfolded state to the folded state, the two groups of frame members are forced to contract and rotate and fold around the center of the hinge (2); In the unfolded state, the first frame (11) and the third frame (13) are orthogonal to each other in the space coordinate system, and the first angular distance and the second angular distance are both 45 degrees.

6. The passive telescopic reading and writing device as claimed in claim 5, characterized in that: When the frame assembly (1) is in the unfolded state, the target reading object is located at the lower side of the second frame body (12) along a first direction, and the first frame body (11) is arranged in parallel with a two-dimensional carrying surface corresponding to the target reading object; The first frame (11), the second frame (12) and the third frame (13) are in contact with each other along a second direction in the folded state.

7. The passive telescopic reading and writing device according to any one of claims 1 to 3, characterized in that: The frame assembly (1) is provided with grooves on two opposite sides along a third direction to provide accommodation space for the contraction of the frame members; each group of the frame members includes two hydraulic rods (41), and the inner wall of the groove is connected to a middle member (42) to be hinged to the end of the hydraulic rod (41).

8. The passive telescopic reading and writing device according to any one of claims 1 to 3, characterized in that: The invention also comprises a locking assembly (5), wherein the locking assembly (5) comprises a first locking buckle (51) and a second locking buckle (52) arranged in pair, wherein the first locking buckle (51) and the second locking buckle (52) are respectively arranged on the side of the first frame body (11) and the third frame body (13); in the folded state, the first frame body (11) and the third frame body (13) can interfere with each other to constrain the extension and contraction of the two groups of frame members, thereby limiting the degree of freedom of the frame assembly (1).

9. A device adjustment method, characterized in that: include: The passive telescopic image reading and writing device is placed on a preset target bracket, and the passive telescopic image reading and writing device is adjusted to a predetermined target posture; Release the restrictions of the first lock buckle (51) and the second lock buckle (52) in the locking assembly (5), so that the four hydraulic rods (41) corresponding to the two groups of frame members are extended to a predetermined length; Placing a target reading object on a preset two-dimensional carrying surface, wherein the two-dimensional carrying surface is located on the lower side of the second lens (32) of the passive telescopic reading and writing device; The target reading object is geometrically magnified by reflection and diffusion of the projected light, so that the image presented by the target reading object has a sense of distance, and the magnified image is imaged on an imaging panel (33); After the device is used, an external force is applied to push the surface of the first frame (11) so that the four hydraulic rods (41) are forced to retract to their original positions, and the first locking buckle (51) and the second locking buckle (52) are locked, thereby achieving the folding of the passive telescopic reading and writing device.

10. The device adjustment method according to claim 9, characterized in that: After placing the target reading material on the preset two-dimensional carrying surface, the device adjustment method further includes: Checking whether there is a deviation between the extension direction of the width corresponding to the first frame (11) and the extension direction of the two-dimensional carrying surface; In case of deviation, the posture of the passive telescopic reading and writing device on the target support is corrected.

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