A multi-camera tablet device

Abstract

This utility model discloses a multi-camera tablet device, relating to the field of tablet device technology. The tablet device includes a screen, a main casing, and a capture casing. At least a first camera and a second camera are housed inside the capture casing. The capture casing is connected to the top of the main casing, and its front part has a first capture end face. The angle between the first capture end face and the plane of the screen is obtuse. The first capture end face has a first capture hole and a second capture hole. The first camera captures images through the first capture hole, and the second camera captures images through the second capture hole. The optical axes of the first and second cameras are not parallel and are both tilted at an acute angle towards the screen. This utility model, by setting a capture casing on the main casing of the tablet device and housing cameras with non-parallel optical axes within the capture casing, can simultaneously adapt to portrait and desktop photography, expanding the device's application scenarios in smart education and smart office environments.

Description

Technical Field

[0001] This utility model relates to the field of tablet device technology, and in particular to a multi-camera tablet device. Background Technology

[0002] With the widespread adoption of tablet devices in smart education and smart office applications, user demand for their image capture capabilities is increasing. More and more users are using tablet cameras for portrait photography (e.g., video calls, facial recognition) and desktop document capture (e.g., scanning text, capturing desktop images). However, current mainstream tablet devices lack the hardware configuration to meet these needs. First, most existing tablet devices use a single camera design, which has a fixed field of view, object distance, and tilt direction, making it unable to simultaneously adapt to the different shooting needs of portraits and desktops. When used for portrait shooting, if the camera is facing the user, its field of view and angle are insufficient to cover the desktop area, resulting in a narrow or distorted image of the desktop document; if the angle is adjusted to suit desktop shooting, the image cannot be clearly captured due to the low or offset viewing angle.

[0003] Secondly, some tablet devices address the aforementioned issues through adjustable structures or multiple cameras. However, on the one hand, the mechanical rotating parts of tablet devices with rotatable camera modules are prone to wear, jamming, or even malfunction after long-term use, affecting the stability and lifespan of the device. On the other hand, most of the cameras on tablet devices with multiple cameras are installed inside the main casing parallel to the screen, making it difficult to accurately control the installation angle of the cameras to accurately match the different perspective requirements for portrait and desktop photography. Utility Model Content

[0004] To address one or more technical problems in the prior art, this utility model provides a multi-camera tablet device: The tablet device includes a screen, a main unit casing, and a data acquisition casing, and the data acquisition casing is equipped with at least a first camera and a second camera. The acquisition shell is connected to the top of the main unit shell. The front of the acquisition shell is provided with a first acquisition end face. The angle between the first acquisition end face and the plane where the screen is located is an obtuse angle. The first acquisition end face is provided with a first acquisition hole and a second acquisition hole. The first camera acquires images through the first acquisition hole, and the second camera acquires images through the second acquisition hole. The optical axis of the first camera and the optical axis of the second camera are not parallel and are both tilted at an acute angle toward the screen.

[0005] Optionally, the angle between the optical axis of the first camera and the normal to the plane of the screen is 4° to 14°.

[0006] Preferably, the angle between the optical axis of the first camera and the normal to the plane of the screen is 7° to 11°.

[0007] More preferably, the angle between the optical axis of the first camera and the normal to the plane where the screen is located is 9°.

[0008] Optionally, the field of view of the first camera is 77°~87°.

[0009] Preferably, the field of view of the first camera is 80°~84°.

[0010] More preferably, the field of view of the first camera is 82°.

[0011] Optionally, the angle between the optical axis of the second camera and the plane of the screen is 57° to 67°.

[0012] Preferably, the angle between the optical axis of the second camera and the plane of the screen is 60° to 64°.

[0013] More preferably, the angle between the optical axis of the second camera and the plane of the screen is 62°.

[0014] Optionally, the field of view of the second camera is 85°~95°.

[0015] Preferably, the field of view of the second camera is 88°~92°.

[0016] More preferably, the field of view of the second camera is 90°.

[0017] Optionally, the flat panel device is connected to a support frame, the support frame including an upper support shell, a lower support shell and a rotating mechanism, the rotating mechanism including a torque hinge and a stop hinge; The torsion hinge includes an upper torsion hinge and a lower torsion hinge. The bottom of the upper torsion hinge is fixedly connected to the top of the lower torsion hinge. The upper torsion hinge and the lower torsion hinge can generate relative torsional deformation under force. When the rotating mechanism is in the maximum rotation state, the torsion hinge is in the elastic deformation state. The stop hinge includes an upper stop and a lower stop connected by a pivot. The bottom of the upper stop is provided with a first limiting structure, and the top of the lower stop is provided with a second limiting structure that cooperates with the first limiting structure to limit the maximum rotation state of the rotating mechanism. The upper hinge and the upper stop hinge are connected to the upper support shell, the lower hinge and the lower stop hinge are connected to the lower support shell, the upper support shell is connected to the upper side of the back of the main unit shell, and the lower support shell is rotated by the rotating mechanism to provide support for the upright position of the flat panel device.

[0018] Optionally, when the support frame supports the tablet device on a horizontal surface and the rotating mechanism is in its maximum rotation state, the angle between the plane where the screen is located and the normal to the horizontal plane is 15°~25°.

[0019] Preferably, when the support frame supports the tablet device on a horizontal surface and the rotating mechanism is in its maximum rotation state, the angle between the plane where the screen is located and the normal to the horizontal plane is 18°~22°.

[0020] More preferably, when the support frame supports the tablet device on a horizontal surface and the rotating mechanism is in its maximum rotation state, the angle between the plane where the screen is located and the normal to the horizontal plane is 20°.

[0021] Optionally, the acquisition shell is further provided with a third camera and an LED light. The rear of the acquisition shell is provided with a second acquisition end face. The second acquisition end face is provided with a third acquisition hole and a light hole. The third camera acquires images through the third acquisition hole, and the LED light emits light through the light hole. The support frame does not obstruct the second acquisition end face, and the structure of the support frame ensures that when the flat plate device with the support frame connected to its back is placed flat on the bearing surface, the second acquisition end face does not contact the bearing surface.

[0022] Optionally, the first limiting structure is a first annular structure, and the second limiting structure is a second annular structure. The first annular structure and the second annular structure are respectively sleeved on the rotating shaft. The sum of the annular start and stop angles of the first annular structure and the second annular structure is less than 360°. When the first mating surface of the first annular structure is in contact with the second mating surface of the second annular structure, the rotating mechanism is in the maximum rotation state.

[0023] Optionally, the inside of the acquisition shell is further provided with a distance sensor, and the first acquisition end face is further provided with a fourth acquisition hole, through which the distance sensor acquires distance.

[0024] The beneficial effects of this utility model are: This invention sets a capture shell on the main casing of a tablet device and sets a camera with a non-parallel optical axis in the capture shell, which can simultaneously adapt to portrait and desktop shooting, expanding the application scenarios of the device in smart education and smart office. Attached Figure Description

[0025] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0026] Figure 1 A stereoscopic multi-camera tablet device according to an embodiment of the present invention. Figure 1 ; Figure 2 A stereoscopic multi-camera tablet device according to an embodiment of the present invention. Figure 2 ; Figure 3 A stereoscopic multi-camera tablet device according to an embodiment of the present invention. Figure 3 ; Figure 4 A stereoscopic multi-camera tablet device according to an embodiment of the present invention. Figure 4 ; Figure 5 This is a front view of a multi-camera tablet device according to an embodiment of the present utility model; Figure 6 This is a side view of a multi-camera tablet device according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the collection shell according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the external structure of the support frame according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the internal structure of the support frame according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the rotating mechanism according to an embodiment of the present utility model; Figure 11 This is a schematic diagram of the initial state of the torque hinge according to an embodiment of the present utility model; Figure 12 This is a schematic diagram of the torsion state of the torque hinge according to an embodiment of the present utility model; Figure 13 This is a schematic diagram of the top end page according to an embodiment of the present utility model; Figure 14 This is a schematic diagram of the bottom page according to an embodiment of the present utility model; Figure 15 This is a schematic diagram of the initial state of the stop hinge according to an embodiment of the present utility model; Figure 16 This is a schematic diagram of the stop state of the stop hinge according to an embodiment of the present utility model; Figure 17 This is a schematic diagram illustrating the change of the stop hinge between the initial state and the stop state according to an embodiment of the present utility model; Figure 18 This is a schematic diagram of a flat panel device with a support frame according to an embodiment of the present invention. Figure 1 ; Figure 19This is a schematic diagram of a flat panel device with a support frame according to an embodiment of the present invention. Figure 2 ; Figure 20 This is a schematic diagram of a flat panel device with a support frame according to an embodiment of the present invention. Figure 3 ; Figure 21 This is a schematic diagram of a flat panel device with a support frame according to an embodiment of the present invention. Figure 4 ; Figure 22 This is a schematic diagram of a flat panel device with a support frame according to an embodiment of the present invention. Figure 5 .

[0027] In the picture: 1. Flat panel device; 11. Screen; 12. Main unit casing; 13. Acquisition shell; 131. First acquisition end face; 1311. First acquisition hole; 1312. Second acquisition hole; 1313. Fourth acquisition hole; 132. Second acquisition end face; 1321. Third acquisition hole; 1322. Lamp hole; 14. First camera; 15. Second camera; 16. Third camera; 17. LED lights; 18. Distance sensor; 2. Support frame; 21. Upper supporting shell; 22. Lower support shell; 23. Rotating mechanism; 231. Torque hinge; 2311. Upper hinge; 2312. Lower hinge; 232. Stop hinge; 2321. Upper stop hinge; 23211. First limiting structure; 232111. First mating surface; 2322. Lower stop hinge; 23221. Second limiting structure; 232211. Second mating surface; 233. Rotating shaft. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0029] It should be noted that, in order to clearly show the structural relationship of the internal key components of this utility model, some pipelines, lines, support brackets and other components of the actual product are omitted in the drawings. However, the specific design schemes of these omitted components are all easily implemented by those skilled in the art based on the technical solutions currently provided by this utility model and conventional design.

[0030] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] Example 1: like Figures 1-21 As shown, this utility model provides a multi-camera tablet device: The tablet device 1 includes a screen 11, a main unit casing 12 and a data acquisition casing 13. The data acquisition casing 13 is equipped with at least a first camera 14 and a second camera 15. The acquisition shell 13 is connected to the top of the main body shell 12. The front of the acquisition shell 13 is provided with a first acquisition end face 131. The angle between the first acquisition end face 131 and the plane where the screen 11 is located is an obtuse angle. The first acquisition end face 131 is provided with a first acquisition hole 1311 and a second acquisition hole 1312. The first camera 14 acquires images through the first acquisition hole 1311, and the second camera 15 acquires images through the second acquisition hole 1312. The optical axis of the first camera 14 and the optical axis of the second camera 15 are not parallel and are both tilted at an acute angle toward the screen 11.

[0032] In practice, the main housing 12 and the acquisition housing 13 can be integrally formed, or they can be manufactured separately and then fixed together using clips, screws, adhesives, etc. For fixing the camera inside the acquisition housing 13, a bracket matching the camera's shape can be used to secure the camera inside the acquisition housing 13. The first acquisition end face 131 at the front of the acquisition housing 13 can be a plane inclined relative to the plane of the screen 11, such as... Figure 6As shown in θ9, the included angle is an obtuse angle, for example, θ9 = 120°~160°. A transparent glass cover or an acrylic cover can be attached to the first acquisition end face 131. The cover can shield the first acquisition hole 1311 and the second acquisition hole 1312 as a lens protection measure, and at the same time prevent dust and liquid from entering the acquisition shell 13.

[0033] In conventional tablets, the camera is usually at a 90° angle to the screen 11 (the optical axis is perpendicular to the screen 11), allowing only one-way shooting. This invention, however, uses a non-perpendicular and non-parallel optical axis design, enabling the two cameras to cover different areas. For example, the first camera 14 tilts at a relatively small angle to the screen 11, while the second camera 15 tilts at a relatively large angle. In this case, the first camera 14 can be used as a portrait capture camera, and the second camera 15 as a document capture camera. Both cameras can simultaneously adapt to dual-scene shooting needs without mechanical adjustment, improving the flexibility and practicality of image acquisition. The tablet device 1 can be placed upright on a desktop or other support surface using the factory-installed support structure or an optional external support structure.

[0034] Example 2: Furthermore, the angle between the optical axis of the first camera 14 and the normal of the plane containing the screen 11 is 4°~14°.

[0035] Preferably, the angle between the optical axis of the first camera 14 and the normal to the plane where the screen 11 is located is 7° to 11°.

[0036] More preferably, the angle between the optical axis of the first camera 14 and the normal of the plane containing the screen 11 is 9°.

[0037] In specific implementation, the angle between the optical axis of the first camera 14 and the normal to the plane where the screen 11 is located is as follows: Figure 22 As shown in θ5, this is the angle at which the optical axis tilts towards the front of the screen 11. This angle can be controlled through mechanical calibration before the device leaves the factory, and a positioning groove can be preset on the plastic bracket inside the acquisition housing 13 to fix the first camera 14 in the positioning groove, thereby reducing the optical axis angle error. When the user uses the tablet device 1 to take portrait photos, the angle between the optical axis of the first camera 14 and the normal is around 9°, which makes it easier for the center of the lens's field of view to be aligned with the user's face area.

[0038] Example 3: Furthermore, the field of view of the first camera 14 is 77°~87°.

[0039] Preferably, the field of view of the first camera 14 is 80°~84°.

[0040] Even better, the field of view of the first camera 14 is 82°.

[0041] In specific implementation, the field of view (FoV) of the first camera 14 is as follows: Figure 22 As shown in θ6, this can be achieved through lens selection. A field of view around 82° can capture the user's face and area above the shoulders well while avoiding obvious distortion, making it suitable for a variety of portrait shooting scenarios.

[0042] Example 4: Furthermore, the angle between the optical axis of the second camera 15 and the plane where the screen 11 is located is 57°~67°.

[0043] Preferably, the angle between the optical axis of the second camera 15 and the plane of the screen 11 is 60° to 64°.

[0044] More preferably, the angle between the optical axis of the second camera 15 and the plane where the screen 11 is located is 62°.

[0045] In specific implementation, the angle between the optical axis of the second camera 15 and the plane where the screen 11 is located is as follows: Figure 22 As shown in θ7, this angle can be controlled through mechanical calibration before the device leaves the factory. A positioning groove can be pre-set on the plastic bracket inside the acquisition housing 13 to fix the second camera 15 within the groove, thus reducing optical axis angle errors. When a user uses the tablet device 1 to capture desktop documents, the angle between the optical axis of the second camera 15 and the plane of the screen 11 is approximately 62°, which can cover a large desktop area, improving the accuracy and clarity of desktop image capture.

[0046] Example 5: Furthermore, the field of view of the second camera 15 is 85°~95°.

[0047] Preferably, the field of view of the second camera 15 is 88°~92°.

[0048] Even better, the field of view of the second camera 15 is 90°.

[0049] In practical implementation, the field of view of the second camera 15 is as follows: Figure 22 As shown in θ8, this can be achieved through lens selection. The field of view around 90° can cover a large desktop area. On the other hand, the field of view of the second camera 15 and the angle between its optical axis work together to ensure that the second camera 15 will not capture the screen 11 when shooting desktop documents (the second camera 15 can only capture the screen 11 when its field of view is greater than twice 57°~67°, i.e., 114°~134°).

[0050] Example 6: Furthermore, the flat panel device 1 is connected to a support frame 2, which includes an upper support shell 21, a lower support shell 22, and a rotating mechanism 23. The rotating mechanism 23 includes a torque hinge 231 and a stop hinge 232. The torque hinge 231 includes an upper hinge 2311 and a lower hinge 2312. The bottom of the upper hinge 2311 is fixedly connected to the top of the lower hinge 2312. The upper hinge 2311 and the lower hinge 2312 can generate relative torsional deformation under force. When the rotating mechanism 23 is in the maximum rotation state, the torque hinge 231 is in the elastic deformation state. The stop hinge 232 includes an upper stop 2321 and a lower stop 2322 rotatably connected by a pivot 233. The bottom of the upper stop 2321 is provided with a first limiting structure 23211, and the top of the lower stop 2322 is provided with a second limiting structure 23221 that cooperates with the first limiting structure 23211 to limit the maximum rotation state of the rotating mechanism 23. The upper twist page 2311 and the upper stop page 2321 are connected to the upper support shell 21, and the lower twist page 2312 and the lower stop page 2322 are connected to the lower support shell 22. The upper support shell 21 is connected to the upper side of the back of the main body shell 12, and the lower support shell 22 is rotated by the rotating mechanism 23 to provide support for the upright position of the flat panel device 1.

[0051] In specific implementation, the upper stop page 2321 and the lower stop page 2322 can be manufactured using powder metallurgy forming technology, and the main body thickness can be controlled between 0.8 and 1.2 mm. Powder metallurgy can ensure the dimensional accuracy and structural strength of the stop pages. The upper twist page 2311 and the lower twist page 2312 of the torsion page can be stamped using SUS304 material, and the main body thickness can be controlled between 0.5 and 0.8 mm. SUS304 material has excellent elasticity and corrosion resistance, and can maintain torsional deformation capacity for a long time.

[0052] The upper support shell 21 can be connected to the flat panel device 1 by adhesive bonding (applicable to flat panel devices 1 with factory-installed support frame 2), snap-fit, or magnetic connection: when adhesive bonding, epoxy resin adhesive can be used to ensure connection stability; snap-fit ​​can be achieved by setting buckles on the edge of the upper support shell 21 to snap-fit ​​with the slot or frame on the back of the flat panel device 1; magnetic connection can be achieved by using a magnet assembly to achieve adsorption and fixation.

[0053] When the rotating mechanism 23 is in its initial state, the upper hinge 2311 and the lower hinge 2312 of the torque hinge 231 remain parallel (e.g., Figure 11 As shown), the upper stop page 2321 and the lower stop page 2322 of the stop hinge 232 are also in a parallel state (as shown). Figure 15 As shown), at this time, the torque hinge 231 does not undergo torsional deformation, and the entire rotating mechanism 23 is in a natural state, allowing the flat device 1 connected to the support frame 2 to be stored in a fitted state (as shown). Figure 18 , 19 (As shown), it is easy to carry.

[0054] When an external force is applied to the lower support shell 22, driving it to rotate around the pivot 233, the main body of the upper hinge 2311 remains fixed with the upper support shell 21, while the main body of the lower hinge 2312 rotates with the lower support shell 22, resulting in relative torsional deformation between the upper hinge 2311 and the lower hinge 2312 (e.g., ...). Figure 12 As shown). When the rotating mechanism 23 reaches its maximum rotation state (i.e., when the stop hinge 232 reaches its maximum rotation state, as shown). Figure 16 As shown), the torque hinge 231 remains in an elastic deformation state (this can be achieved by selecting a torque hinge 231 of different materials or adjusting its thickness), ensuring that the torque hinge 231 can return to its initial shape after the external force is removed, while avoiding adjustment failure caused by permanent deformation. The first limiting structure 23211 and the second limiting structure 23221 of the stop hinge 232 cooperate to achieve angle limiting.

[0055] This invention utilizes the elastic deformation of the torsion hinge 231 to achieve stepless adjustment from 0° to the maximum rotation angle (e.g., 40°, 50°, 60°, etc.), allowing users to flexibly adjust the viewing angle of the tablet device 1 according to their posture and usage scenario (writing, watching movies). The continuous deformation characteristic of the torsion hinge 231 replaces discrete structures such as buckles and stops, enabling precise adjustment of the viewing angle. The metal torsion hinge 231 and stop hinge 232 allow for a relatively thin body, meeting the design requirements of a lightweight, compact, and portable support frame.

[0056] The optical axis angles of the first camera 14 and the second camera 15 are factory-fixed and cannot be changed. However, by rotating the support bracket 2, the upright angle of the tablet device 1 can be changed, thereby adjusting the actual shooting field of view of the two cameras. For example, when the user needs to shoot a distant desktop area, the rotation angle of the support bracket 2 can be increased (making the second camera 15 tilt more upwards), at which point the field of view of the second camera 15 covers a larger area of ​​the desktop; when the user needs to shoot a closer desktop area, the rotation angle of the support bracket 2 can be decreased (making the second camera 15 tilt more downwards), at which point the field of view of the second camera 15 covers a smaller area of ​​the desktop.

[0057] Example 7: Furthermore, when the support frame 2 supports the tablet device 1 on a horizontal surface and the rotating mechanism 23 is in its maximum rotation state, the angle between the plane where the screen 11 is located and the normal to the horizontal plane is 15°~25°.

[0058] Preferably, when the support frame supports the tablet device on a horizontal surface and the rotating mechanism 23 is in its maximum rotation state, the angle between the plane where the screen 11 is located and the normal to the horizontal plane is 18°~22°.

[0059] More preferably, when the support frame supports the tablet device on a horizontal surface and the rotation mechanism 23 is in its maximum rotation state, the angle between the plane where the screen 11 is located and the normal to the horizontal plane is 20°.

[0060] In specific implementation, such as Figure 22 As shown, when the support frame 2 supports the tablet device 1 on a horizontal surface and the rotating mechanism 23 is in the maximum rotation state, the angle between the plane where the screen 11 of the tablet device 1 is located and the normal of the horizontal plane is controlled within a range of about 20°, so that the normal direction of the screen 11 is basically consistent with the user's line of sight, reducing the downward angle of the eyes and reducing visual fatigue.

[0061] The angle between the plane of screen 11 and the normal to the horizontal plane can be accurately controlled by a support structure with a fixed adjustable angle or by the rotation mechanism 23 in the above embodiments. For example, if the screen 11 of the tablet device 1 is parallel to the back body of the tablet device 1, and it is necessary to control the angle θ4 between the screen 11 and the normal to the horizontal plane to about 20°, a stop hinge 232 with a maximum rotation angle θ3 of 40° can be selected.

[0062] The optical axis angles of the first camera 14 and the second camera 15 work in conjunction with the tilt angle of the screen 11 to make it easier for the first camera 14 to capture the user's face when the user's gaze is directly on the screen 11, while the second camera 15 can capture a wider range of desktop documents. This is suitable for intelligent education scenarios (such as online education and intelligent tutoring) and intelligent office scenarios (such as meeting minutes and document scanning).

[0063] Example 8: Furthermore, the acquisition shell 13 is also equipped with a third camera 16 and an LED light 17. The rear of the acquisition shell 13 is provided with a second acquisition end face 132. The second acquisition end face 132 is provided with a third acquisition hole 1321 and a light hole 1322. The third camera 16 acquires images through the third acquisition hole 1321, and the LED light 17 emits light through the light hole 1322. The support frame 2 does not obstruct the second acquisition end face 132, and the structure of the support frame 2 ensures that when the flat plate device 1 with the support frame 2 connected to its back is placed flat on the bearing surface, the second acquisition end face 132 does not contact the bearing surface.

[0064] In practice, the third camera 16 and the LED light 17 can be fixed inside the acquisition shell 13 using a plastic bracket. A transparent glass or acrylic cover plate can be attached to the second acquisition end face 132 to protect the third camera 16. The third camera 16 works in conjunction with the LED light 17 to capture images in low-light environments.

[0065] With the tablet device 1 connected to the support frame 2, the upper support shell 21 of the support frame 2 can be designed with a clearance hole that matches the shape of the back of the acquisition shell 13, so as to avoid the support frame 2 from blocking the light path of the third camera 16 and the LED light 17.

[0066] The support frame 2 can use its main body thickness or specially designed pads, protrusions and other structures to ensure that when the flat device 1 is placed flat on the bearing surface, the second collection end face 132 is higher than the bearing surface, thus preventing friction damage to the second collection end face 132 when the flat device 1 is used flat.

[0067] Example 9: Furthermore, the first limiting structure 23211 is a first annular structure, and the second limiting structure 23221 is a second annular structure. The first annular structure and the second annular structure are respectively sleeved on the rotating shaft 233. The sum of the annular start and stop angles of the first annular structure and the annular start and stop angles of the second annular structure is less than 360°. When the first mating surface 232111 of the first annular structure is mated with the second mating surface 232211 of the second annular structure, the rotating mechanism 23 is in the maximum rotation state.

[0068] In specific implementation, the start and end angles of the fan ring (e.g.) Figure 17 The design of θ1 and θ2 in the figure can be based on the maximum rotation angle (e.g., Figure 17 The angle θ3 in the equation is determined. For example, if a maximum rotation angle of 40° is required (i.e., θ3 = 40°), the starting and ending angles of the first annular structure can be set to 160° (i.e., θ1 = 160°), and the starting and ending angles of the second annular structure can be set to 160° (i.e., θ2 = 160°). The sum of the two is 320°, and the maximum rotation angle is 360° - 320° = 40°. When the upper support shell 21 is connected to the flat plate device 1, the rotating mechanism 23 rotates. The first annular structure remains stationary with the upper stop 2321, and the second annular structure rotates with the lower stop 2322. When the first mating surface 232111 (one end face of the first annular structure) and the second mating surface 232211 (one end face of the second annular structure) are in contact with each other, the two annular structures form a mechanical block, restricting the rotating mechanism 23 from continuing to rotate.

[0069] The optical axis angles of the first camera 14 and the second camera 15, when combined with a specific device placement angle, can achieve better shooting results. The fan-shaped limiting structure can more accurately control the maximum rotation angle of the rotating mechanism 23, ensuring that the angle between the screen 11 and the normal to the horizontal plane is stable at around 20° when the device is placed upright. This ensures that the optical axis of the first camera 14 is more easily aligned with the user's face, and the optical axis of the second camera 15 is more easily aligned with the desktop document area.

[0070] Example 10: Furthermore, a distance sensor 18 is also provided inside the acquisition shell 13, and a fourth acquisition hole 1313 is also provided on the first acquisition end face 131. The distance sensor 18 acquires the distance through the fourth acquisition hole 1313.

[0071] In specific implementation, the ranging sensor 18 can be fixed inside the acquisition shell 13 by a plastic bracket. This utility model can use the ranging sensor 18 that is widely used in the prior art. The ranging sensor 18 can emit detection signals (such as infrared or ultrasonic waves) through the fourth acquisition hole 1313. After the signal comes into contact with the target object (such as the user's face or desktop document), it is reflected back to the sensor. The sensor calculates the distance between the device and the target object based on the time difference or phase difference between the signal transmission and reception, and transmits the distance data to the main control chip of the tablet device 1.

[0072] This utility model is entirely an optimization design of the hardware of the existing tablet device 1, without involving any software-level technical improvements. The first camera 14, the second camera 15, the third camera 16, the LED light 17, and the ranging sensor 18 can all be connected to the main control chip of the tablet device 1 via ribbon cables to achieve data transmission and control signal interaction. Regarding power supply, each component can obtain power from the battery of the tablet device 1 via ribbon cables. The above transmission and power supply technologies are already very mature technologies in the prior art, and can be easily implemented by those skilled in the art, so they will not be described in detail here.

[0073] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-camera tablet device, characterized in that: The tablet device (1) includes a screen (11), a main unit shell (12) and a collection shell (13), and the collection shell (13) is provided with at least a first camera (14) and a second camera (15). The acquisition shell (13) is connected to the top of the main body shell (12). The front of the acquisition shell (13) is provided with a first acquisition end face (131). The angle between the first acquisition end face (131) and the plane where the screen (11) is located is an obtuse angle. The first acquisition end face (131) is provided with a first acquisition hole (1311) and a second acquisition hole (1312). The first camera (14) acquires images through the first acquisition hole (1311), and the second camera (15) acquires images through the second acquisition hole (1312). The optical axis of the first camera (14) and the optical axis of the second camera (15) are not parallel and are both tilted at an acute angle toward the screen (11).

2. The multi-camera tablet device according to claim 1, characterized in that: The angle between the optical axis of the first camera (14) and the normal of the plane where the screen (11) is located is 4°~14°.

3. The multi-camera tablet device according to claim 2, characterized in that: The field of view of the first camera (14) is 77°~87°.

4. The multi-camera tablet device according to claim 1, characterized in that: The angle between the optical axis of the second camera (15) and the plane of the screen (11) is 57°~67°.

5. The multi-camera tablet device according to claim 4, characterized in that: The field of view of the second camera (15) is 85°~95°.

6. The multi-camera tablet device according to claim 1, characterized in that: The flat panel device (1) is connected to a support frame (2), which includes an upper support shell (21), a lower support shell (22) and a rotating mechanism (23). The rotating mechanism (23) includes a torque hinge (231) and a stop hinge (232). The torsion hinge (231) includes an upper hinge (2311) and a lower hinge (2312). The bottom of the upper hinge (2311) is fixedly connected to the top of the lower hinge (2312). The upper hinge (2311) and the lower hinge (2312) can generate relative torsional deformation under force. When the rotating mechanism (23) is in the maximum rotation state, the torsion hinge (231) is in an elastic deformation state. The stop hinge (232) includes an upper stop (2321) and a lower stop (2322) rotatably connected by a pivot (233). The bottom of the upper stop (2321) is provided with a first limiting structure (23211), and the top of the lower stop (2322) is provided with a second limiting structure (23221) that cooperates with the first limiting structure (23211) to limit the maximum rotation state of the rotating mechanism (23). The upper hinge (2311) and the upper stop (2321) are connected to the upper support shell (21), the lower hinge (2312) and the lower stop (2322) are connected to the lower support shell (22), the upper support shell (21) is connected to the upper back of the main body shell (12), and the lower support shell (22) is rotated by the rotating mechanism (23) to provide support for the upright position of the flat panel device (1).

7. The multi-camera tablet device according to claim 6, characterized in that: When the support frame (2) supports the tablet device (1) on a horizontal surface and the rotating mechanism (23) is in the maximum rotation state, the angle between the plane where the screen (11) is located and the normal of the horizontal plane is 15°~25°.

8. The multi-camera tablet device according to claim 6, characterized in that: The acquisition shell (13) is also equipped with a third camera (16) and an LED light (17). The rear of the acquisition shell (13) is provided with a second acquisition end face (132). The second acquisition end face (132) is provided with a third acquisition hole (1321) and a light hole (1322). The third camera (16) acquires images through the third acquisition hole (1321), and the LED light (17) emits light through the light hole (1322). The support frame (2) does not obstruct the second acquisition end face (132), and the structure of the support frame (2) ensures that when the flat plate device (1) with the support frame (2) connected to its back is placed flat on the bearing surface, the second acquisition end face (132) does not contact the bearing surface.

9. The multi-camera tablet device according to claim 6, characterized in that: The first limiting structure (23211) is a first fan ring structure, and the second limiting structure (23221) is a second fan ring structure. The first fan ring structure and the second fan ring structure are respectively sleeved on the rotating shaft (233). The sum of the fan ring start and stop angles of the first fan ring structure and the fan ring start and stop angles of the second fan ring structure is less than 360°. When the first mating surface (232111) of the first fan ring structure is mated with the second mating surface (232211) of the second fan ring structure, the rotating mechanism (23) is in the maximum rotation state.

10. The multi-camera tablet device according to any one of claims 1 to 9, characterized in that: The acquisition shell (13) is also equipped with a distance sensor (18), and the first acquisition end face (131) is also equipped with a fourth acquisition hole (1313). The distance sensor (18) acquires the distance through the fourth acquisition hole (1313).

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