Fog view screen

Abstract

The utility model provides a fog view screen which comprises a shell, a protective cover and a matching structure, the shell is provided with an observation window, and the protective cover is rotationally connected with the shell and used for shielding the observation window; and the matching structure is matched with the protective cover, so that the protective cover has a covering state of shielding the observation window and a hovering state of exposing the observation window. Therefore, when the fog view screen is in the working state, the protective cover can be switched to the hovering state, so that the protective cover is prevented from shielding the observation window of the fog view screen; when the fog screen is in an idle state, the protective cover can be switched to a covering state, so that a protective effect is achieved, and the surface of the observation window is protected. The fog screen is simple in structure and can effectively meet the dustproof requirement, the number of times of wiping the observation window is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a fog screen. Background Art

[0002] Fog screens, also known as telescopic screens, utilize Birdbath (coaxial air-guided) optical design principles and technology to transform near-range images into distant ones, reducing image lag and thus alleviating eye strain, thus eliminating the root cause of myopia. Currently, the viewing windows of these products are tilted at a 40° to 50° angle from the horizontal. Inclined windows are prone to dust accumulation, and frequent wiping can damage the glass surface coating. Therefore, a fog screen that effectively prevents dust is urgently needed. Utility Model Content

[0003] In view of the shortcomings of the related art, the present application proposes a fog screen to solve the problem that dust easily accumulates on the observation window of the fog screen in the related art.

[0004] The embodiment of the present application provides a fog screen, comprising:

[0005] a housing having an observation window;

[0006] a protective cover, rotatably connected to the housing and used to shield the observation window;

[0007] The matching structure matches the protective cover so that the protective cover has a covering state for shielding the observation window and a hovering state for exposing the observation window.

[0008] In some embodiments, the mating structure includes a first fixing plate, a first magnetic component and a second magnetic component, the first fixing plate is connected to the shell, the protective cover is located between the first fixing plate and the observation window, the first magnetic component is connected to the first fixing plate, and the second magnetic component is connected to the protective cover.

[0009] In some embodiments, the matching structure further includes a second fixing plate for shielding ambient light, wherein the second fixing plate is connected between the first fixing plate and the housing and is located on a side of the observation window.

[0010] In some embodiments, the first magnetic member is disposed on a side of the first fixing plate close to the protective cover, and the second magnetic member is disposed on a side of the protective cover close to the first fixing plate.

[0011] In some embodiments, the mating structure includes a friction member, one of the two opposite side surfaces of the friction member abuts against the protective cover, and the other side abuts against the shell, so that during the rotation of the protective cover relative to the shell, friction is generated between the protective cover and the friction member so that the protective cover can have multiple hovering states.

[0012] In some embodiments, the protective cover is provided with a support ear, the support ear is provided with a first through hole, the shell is provided with a limiting groove for accommodating the support ear, the limiting groove is provided with a mounting shaft connected to the shell, the mounting shaft is provided through the first through hole, and the support ear can rotate relative to the mounting shaft; the friction member is provided in the limiting groove, and of the opposite sides of the friction member, one side abuts against the groove wall of the limiting groove, and the other side abuts against the support ear.

[0013] In some embodiments, friction members are respectively provided on opposite sides of the support ear. The friction members are respectively provided on opposite sides of the support ear, and the two friction members are respectively in contact with the side surfaces of the limiting groove.

[0014] In some embodiments, the friction member is provided with a mounting hole, and the mounting shaft passes through the mounting hole.

[0015] In some embodiments, the side wall of the limiting groove is provided with a second through hole, and the installation shaft is provided through the second through hole; the shell is provided with a first limiting block and a second limiting block that are embedded in each other, the first limiting block is fixedly connected to the shell, and the second limiting block abuts against the end face of the installation shaft, and the first limiting block and the second limiting block are detachably connected.

[0016] In some embodiments, the protective cover includes a cover plate and a side panel connected to the side of the cover plate, and the shell has a storage space for accommodating the side panel; when the protective cover is in the covering state, the side panel is located in the storage space; when the protective cover is in the hovering state, the side panel is located between the shell and the cover plate, and is located on the side of the observation window.

[0017] In some embodiments, the housing is provided with a groove, and when the protective cover is in the covering state, a portion of the edge of the protective cover is located in the groove.

[0018] The beneficial effects of this application include:

[0019] In the embodiment of the present application, a protective cover is added to the housing of the fog screen and, through a mating structure, enables the protective cover to switch between a covering state and a hovering state relative to the housing. This allows the protective cover to be switched to the hovering state when the fog screen is in operation, preventing it from obstructing the observation window of the fog screen. When the fog screen is idle, the protective cover can be switched to the covering state to provide a protective effect and protect the observation window surface. This fog screen has a simple structure, effectively meets dust protection requirements, reduces the number of observation window wiping times, and extends the service life of the device.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figures 1 to 3 FIG2 is a schematic diagram showing a state change of a protective cover of a fog screen provided by an exemplary embodiment of the present application, which switches from a hovering state to a covering state;

[0023] Figure 4 Shown is a front view of a fog screen provided by an exemplary embodiment of the present application;

[0024] Figure 5 Shown Figure 4 Schematic diagram of the structure of the fog screen cut along the section line AA;

[0025] Figure 6 Shown Figure 5 A magnified view of the structure at point D in the middle;

[0026] Figure 7 Shown Figure 1 The structural explosion diagram of the fog screen is shown;

[0027] Figure 8 Shown Figure 2 An exploded view of part of the structure of the fog screen is shown;

[0028] Figures 9 and 10 FIG2 is a schematic diagram showing a state change of a protective cover of a fog screen provided by an exemplary embodiment of the present application, which switches from a hovering state to a covering state;

[0029] Figure 11 Shown Figure 9 The structural explosion diagram of the fog screen is shown;

[0030] Figure 12 Shown Figure 11 Enlarged view of point E in the middle;

[0031] Figure 13 Shown Figure 9 An exploded view of part of the structure of the fog screen is shown;

[0032] Figure 14 Shown Figure 13 Enlarged view of point F in the middle;

[0033] Figure 15 Shown Figure 9 A front view of the fog screen is shown;

[0034] Figure 16 Shown Figure 15 A sectional view taken along section line BB;

[0035] Figure 17 Shown Figure 16 Enlarged view of point G in the middle;

[0036] Figure 18 Shown Figure 9 A top view of the fog screen is shown;

[0037] Figure 19 Shown Figure 18 A sectional view taken along section line CC;

[0038] Figure 20 Shown Figure 19 Enlarged view of point H in the middle.

[0039] In the figure: 1-housing; 101-fixing groove; 1a-observation window; 1b-limiting groove; 1c-groove; 1d-second through hole; 1e-storage space; 11-mounting shaft; 12-first limiting block; 12a-recess; 12b-first fixing hole; 13-second limiting block; 131-convex portion; 13a-second fixing hole; 14-fastener; 2-protective cover; 201, 202-rotating shaft; 2a-first End; 2b-second end; 21-cover plate; 221, 222-side plates; 23-ear; 23a-first through hole; 3-matching structure; 31-first fixed plate; 32-first magnetic member; 33-second magnetic member; 341, 342-second fixed plate; 35-friction member; 351-first friction member; 352-second friction member; 35a-mounting hole; 4-support; 5-support foot; 6-connection port. DETAILED DESCRIPTION

[0040] The Fog Screen, also known as a telephoto screen, utilizes Birdbath optical design principles and technology to transform near-range images into distant ones, reducing image lag and thus alleviating eye strain, thus eliminating the root cause of myopia. Hidden beneath the Fog Screen is a high-definition, high-brightness display. The image on this display is reflected by a unique beam splitter, which alters the light path. This image is then reflected by a concave reflector behind it, creating a magnified, distant virtual image. The light reflected by this concave mirror then passes through the beam splitter again before entering the user's eye. This beam splitter utilizes cutting-edge coating technology to ensure that the light entering the eye has a spectrum similar to natural daylight, providing an invisible layer of protection. Therefore, when using the Fog Screen, the user actually sees a distant virtual image, creating a cinema-like experience. The Fog Screen's unique beam modulation technology cleverly prevents the glare of electronic light from directly reaching the eye, instead gently reflecting it back into the eye. It can be said that the fog screen, with its unique charm, can almost replace the position of televisions and projectors. With less than 1 square meter of desktop space, the environment can be instantly transformed into a movie theater or a large classroom for online courses. Many studies have confirmed that this subtle change not only helps to reduce the incidence of myopia, but also effectively relieves and even improves dry eye symptoms. The fog screen can also fit the curvature of the eyeball to display ring-shaped imaging, and uses a digital defocus algorithm to achieve myopia defocus protection for the main field of view of the retina and the peripheral field of view, effectively thickening the fundus choroid, thereby delaying the development of myopia. At present, the observation windows of products such as fog screens are tilted at an angle of 40° to 50° to the horizontal plane. Inclined observation windows are prone to dust accumulation, and frequent wiping of the observation windows will damage the coating on the glass surface.

[0041] The fog screen provided in this application is intended to solve the above technical problems of related technologies.

[0042] The fog screen in the embodiment of the present application is described in detail below with reference to the accompanying drawings. In the absence of conflict, the features in the following embodiments can complement or be combined with each other.

[0043] like Figures 1 to 3 or Figures 9 and 10 As shown, an embodiment of the present application provides a fog view screen, including a shell 1, a protective cover 2 and a matching structure 3, wherein the shell 1 has an observation window 1a, and the protective cover 2 is rotatably connected to the shell 1 for covering the observation window 1a; the matching structure 3 cooperates with the protective cover 2 so that the protective cover 2 has a covering state for covering the observation window 1a and a hovering state for exposing the observation window 1a.

[0044] In the embodiment of the present application, a protective cover 2 is added to the housing 1 of the fog vision screen and, through a mating structure 3, the protective cover 2 can be switched between a covering state and a hovering state relative to the housing 1. Thus, when the fog vision screen is in operation, the protective cover 2 can be switched to the hovering state to prevent the protective cover 2 from obstructing the observation window 1a of the fog vision screen. When the fog vision screen is idle, the protective cover 2 can be switched to the covering state to achieve a protective effect and protect the surface of the observation window 1a. The fog vision screen has a simple structure, can effectively meet dust protection requirements, reduce the number of times the observation window 1a is wiped, and extend the service life of the device.

[0045] In some embodiments, the observation window 1 a is inclined at an angle of 40° to 50° with the horizontal plane, and the protective cover 2 is parallel to the horizontal plane or inclined at an angle of 0° to 10° with the horizontal plane when in a hovering state.

[0046] In some embodiments, when the protective cover 2 is in the covering state, the protective cover 2 fits against the edge of the observation window 1 a to prevent dust or water vapor in the air from entering the observation window 1 a.

[0047] In some embodiments, as Figure 3 or Figure 10 As shown, the edge of the protective cover 2 and the edge of the observation window 1a are interlocked, and the coverage area of ​​the protective cover 2 is equal to the window area of ​​the observation window 1a. In other embodiments, when the protective cover 2 is in the covering state, the coverage area of ​​the protective cover 2 is larger than the window area of ​​the observation window 1a, and the window area of ​​the observation window 1a is located within the coverage area of ​​the protective cover 2.

[0048] In some embodiments, the protective cover 2 may be made of plastic, metal, or alloy.

[0049] In some embodiments, the top of the housing 1 of the fog screen is wedge-shaped so that the observation window 1 a can be placed tilted.

[0050] In some embodiments, an optical film layer is provided on the surface of the observation window 1a to convert the display image into a distant view image.

[0051] In some embodiments, the observation window 1 a is made of glass or plastic.

[0052] In some embodiments, the shape of the protective cover 2 is the same as that of the observation window 1a. In one example, the protective cover 2 is rectangular. In other embodiments, the shape of the protective cover 2 can be a rounded rectangle, an ellipse, etc.

[0053] Regarding the matching structure 3, this application provides two implementations as follows:

[0054] Implementation Method 1

[0055] like Figures 1 to 3 As shown, Figures 1 to 3The figure shows the state change of the protective cover 2 of the fog screen in this embodiment from the hovering state to the covering state. Figure 1 The figure shows the structure of the protective cover 2 in the suspended state in this embodiment. Figure 3 The figure shows the structure of the protective cover 2 in the covered state in this embodiment. The matching structure 3 includes a first fixing plate 31, a first magnetic member, and a second magnetic member. The first fixing plate 31 is connected to the housing 1, and the protective cover 2 is located between the first fixing plate 31 and the observation window 1a. The first magnetic member is connected to the first fixing plate 31, and the second magnetic member is connected to the protective cover 2.

[0056] In this embodiment, when the first fixing plate 31 and the protective cover 2 are brought into close proximity, a mutual magnetic attraction is generated between the first and second magnetic members, allowing the protective cover 2 to be placed in a suspended state via the first fixing plate 31. To switch the protective cover 2 to a covering state, the user applies force to the first fixing plate 31 and the protective cover 2 to separate them. When the protective cover 2 covers the observation window 1a, the attraction between the first and second magnetic members is very weak, and the weight of the protective cover 2 is greater than the attraction between them, allowing the protective cover 2 to remain in the covering state, preventing dust from falling onto the surface of the observation window 1a. This provides a simple and user-friendly structure.

[0057] In some embodiments, as Figures 1 to 3 As shown, the first magnetic member is disposed on a side of the first fixing plate 31 close to the protective cover 2 , and the second magnetic member is disposed on a side of the protective cover 2 close to the first fixing plate 31 .

[0058] In this embodiment, the first magnetic member and the second magnetic member are both located between the first fixed plate 31 and the protective cover 2. Therefore, when the protective cover 2 is in a hovering state, the distance between the first magnetic member and the second magnetic member can be set to be smaller or in direct contact with each other to increase the magnetic force and improve the stability of the protective cover 2 when it is in a hovering state.

[0059] In other embodiments, the first magnetic member may also be disposed on a side of the first fixing plate 31 away from the protective cover 2 (not shown in the figures), as long as it is ensured that when the protective cover 2 is in a suspended state, the attractive force between the first magnetic member and the second magnetic member secures the protective cover 2 to the first fixing plate 31. In still other embodiments, the second magnetic member may also be disposed on a side of the protective cover 2 away from the first fixing plate 31 (not shown in the figures), as long as it is ensured that when the protective cover 2 is in a suspended state, the attractive force between the first magnetic member and the second magnetic member secures the protective cover 2 to the first fixing plate 31.

[0060] In some embodiments, as Figures 1 to 3As shown, when the protective cover 2 is in the hovering state, the surface of the first magnetic member facing away from the first fixing plate 31 abuts against the surface of the second magnetic member facing away from the protective cover 2. The contact surface between the first and second magnetic members is perpendicular to the first fixing plate 31 and points toward the protective cover 2. Therefore, even when the gap between the first fixing plate 31 and the protective cover 2 is small, the magnetic attraction can be increased by increasing the contact area between the first and second magnetic members, further enhancing the structural stability of the protective cover 2 when in the hovering state.

[0061] In other embodiments, when the protective cover 2 is in a suspended state, the surfaces of the first magnetic member and the second magnetic member that are in contact with each other are parallel to the direction in which the first fixing plate 31 points to the protective cover 2 (not shown in the figure), so as to reduce the total thickness of the first magnetic member and the second magnetic member in the direction in which the first fixing plate 31 points to the protective cover 2. Thus, even if the gap between the first fixing plate 31 and the protective cover 2 is small, that is, when the total thickness of the first magnetic member and the second magnetic member in the direction in which the first fixing plate 31 points to the protective cover 2 is small, the thickness of the first magnetic member and the thickness of the second magnetic member can be set to be larger respectively, and the magnetic attraction force can be further increased by increasing the volume of the magnetic member. In one example, when the protective cover 2 is in a suspended state, the thickness of the first magnetic member in the direction in which the first fixing plate 31 points to the protective cover 2 is equal to the distance between the first fixing plate 31 and the protective cover 2, and the thickness of the second magnetic member in the direction in which the first fixing plate 31 points to the protective cover 2 is equal to the distance between the first fixing plate 31 and the protective cover 2.

[0062] In some embodiments, as Figures 4 to 6 As shown, Figure 4 Shown is a front view of the fog screen in this embodiment. Figure 5 Shown Figure 4 The structural diagram of the fog screen cut along the section line AA, Figure 6 Shown Figure 5 Enlarged view of the structure at point D in the middle. When the protective cover 2 is in the hovering state, the gap d between the first fixing plate 31 and the protective cover 2 is greater than or equal to 1 cm in the direction in which the first fixing plate 31 points to the protective cover 2. This allows the user to easily insert their hand into the gap to change the state of the protective cover 2.

[0063] In some embodiments, when the protective cover 2 is in a suspended state, in the direction in which the first fixing plate 31 points to the protective cover 2 , the gap between the first fixing plate 31 and the protective cover 2 may be 1 cm, 1.5 cm, 2 cm, 3 cm, 5 cm, etc.

[0064] In some embodiments, when the protective cover 2 is in a suspended state, in the direction in which the first fixing plate 31 points to the protective cover 2 , the gap between the first fixing plate 31 and the protective cover 2 is equal to the total thickness of the first magnetic member and the second magnetic member.

[0065] In some embodiments, when the first magnetic member and the second magnetic member are magnetically connected, the opposing surfaces of the first magnetic member and the second magnetic member do not contact each other. In other embodiments, when the first magnetic member and the second magnetic member are magnetically connected, the opposing surfaces of the first magnetic member and the second magnetic member are partially in contact and partially separated. In still other embodiments, when the first magnetic member and the second magnetic member are magnetically connected, the opposing surfaces of the first magnetic member and the second magnetic member are completely in contact with each other.

[0066] In some embodiments, as Figure 7 As shown, Figure 7 Shown in this embodiment Figure 1 The structure of the fog screen is shown in the exploded view. The protective cover 2 has a first end 2a and a second end 2b opposite to each other, wherein the first end 2a of the protective cover 2 is rotatably connected to the housing 1, and the second end 2b has a first position where it is magnetically connected to the first fixing plate 31 and a second position where it is separated from the first fixing plate 31. When the second end 2b of the protective cover 2 is in the first position, the protective cover 2 is in a suspended state (see Figure 1 When the second end 2b of the protective cover 2 is in the second position, the protective cover 2 is in the covering state (see Figure 3 shown).

[0067] In some embodiments, the second magnetic element is disposed at the second end 2 b of the protective cover 2 .

[0068] In some embodiments, as Figure 8 As shown, Figure 8 In this embodiment Figure 2 An exploded view of a portion of the fog screen is shown. The first end 2a of the protective cover 2 is provided with rotating shafts 201 and 202. The housing 1 of the fog screen has a fixing slot 101. The rotating shafts 201 and 202 are inserted into the fixing slot 101 and can rotate relative to the fixing slot 101, thereby forming a rotational connection between the protective cover 2 and the housing 1.

[0069] In other embodiments, the first end 2a of the protective cover 2 is provided with a rotation axis groove, and the housing 1 of the fog window is provided with a fixed shaft (not shown in the figure). The fixed shaft is inserted into the rotation axis groove, and the rotation axis groove can rotate relative to the fixed shaft, so that the protective cover 2 can form a rotational connection with the housing 1.

[0070] In some embodiments, as Figure 1 or Figure 2 or Figure 3As shown, the mating structure 3 also includes second fixing plates 341 and 342 for blocking ambient light. The second fixing plates 341 and 342 are connected to the first fixing plate 31 and the housing 1, and are located on the sides of the observation window 1a. In one example, one of the two opposite sides of the first fixing plate 31 is connected to a second fixing plate 341, and the other side is connected to a second fixing plate 342.

[0071] Implementation Method 2

[0072] like Figures 9 to 11 As shown, Figures 9 and 10 The figure shows the state change of the protective cover 2 from the hovering state to the covering state in this embodiment. Figure 9 The figure shows the structure of the protective cover 2 in the suspended state in this embodiment. Figure 10 FIG. 1 is a schematic structural diagram of the protective cover 2 in the covering state in this embodiment. Figure 11 Shown Figure 9 The structural explosion diagram of the fog screen is shown. Figure 12 Shown Figure 11 Enlarged view at point E in the middle. In this embodiment, the mating structure 3 includes a friction member 35. Of the two opposing side surfaces of the friction member 35, one side abuts the protective cover 2, and the other side abuts the housing 1. As the protective cover 2 rotates relative to the housing 1, friction is generated between the protective cover 2 and the friction member 35, enabling the protective cover 2 to have multiple hovering states.

[0073] In this embodiment, a friction member 35 is added to the fog screen as the matching structure 3, which can make the protective cover 2 hover at any angle, thereby achieving arbitrary adjustment of multiple tilt angles of the protective cover 2. The structure is simple, easy to operate, and can adapt to the needs of various working scenarios.

[0074] In some embodiments, the friction member 35 is interference fit with the protective cover 2 and the shell 1 respectively, so that the friction force between the friction member 35 and the protective cover 2 and the shell 1 can be increased, which helps prevent the protective cover 2 from being unstable when in a hovering state.

[0075] In some embodiments, when the protective cover 2 is in a hovering state, the angle between the protective cover 2 and the observation window 1a can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110° or 120°, etc.

[0076] In some embodiments, the friction member 35 may be made of rubber, polyurethane, silicone, soft PVC, or asphalt-based material.

[0077] In some embodiments, as Figures 11 to 12As shown, the protective cover 2 is provided with a support ear 23, and the support ear 23 is provided with a first through hole 23a. The shell 1 is provided with a limiting groove 1b for accommodating the support ear 23. A mounting shaft 11 connected to the shell 1 is provided in the limiting groove 1b, and the mounting shaft 11 is provided through the first through hole 23a. The support ear 23 can rotate relative to the mounting shaft 11; the friction member 35 is provided in the limiting groove 1b, and one side of the friction member 35 abuts against the groove wall of the limiting groove 1b, and the other side abuts against the support ear 23 on opposite sides.

[0078] In this embodiment, a rotational connection is established between the first through hole 23a of the support ear 23 and the mounting shaft 11 in the limiting groove 1b, and a friction member 35 is provided in the limiting groove 1b. This fixes the position of the protective cover 2 in the axial direction of the first through hole 23a, allowing the protective cover 2 to rotate toward or away from the observation window 1a and to hover at any position.

[0079] In some embodiments, as Figures 11 to 12 As shown, friction members 351 and 352 are respectively provided on opposite sides of the support ear 23. The two friction members 351 and 352 respectively abut against the side surfaces of the limiting groove 1b. The two friction members 35 specifically include a first friction member 351 and a second friction member 352. The first friction member 351 is disposed between one of the opposite sides of the support ear 23 and the groove wall of the limiting groove 1b, and the second friction member 352 is disposed between the other of the opposite sides of the support ear 23 and the groove wall of the limiting groove 1b. This can further increase the frictional resistance between the support ear 23 and the groove wall of the limiting groove 1b, thereby improving the stability of the protective cover 2 in the hovering state and preventing the protective cover 2 from being unable to maintain a stationary state due to insufficient frictional resistance to resist the effect of gravity on the protective cover 2.

[0080] In some embodiments, as Figure 12 As shown, the friction member 35 is provided with a mounting hole 35a, and the mounting shaft 11 passes through the mounting hole 35a. The mounting hole 35a can be used to fix the position of the friction member 35 to prevent the friction member 35 from shifting during the rotation of the protective cover 2.

[0081] In some embodiments, the mounting hole 35 a is disposed at the geometric center of the friction member 35 to ensure that the friction member 35 exerts a uniform friction effect on the lug 23 in all directions.

[0082] In some embodiments, the projection shape of the friction member 35 on the surface of the lug 23 is annular, and the mounting hole 35a is circular.

[0083] In some embodiments, the shape of the friction member 35 coincides with the shape of the side surface of the lug 23 , so as to provide friction damping to the side surface of the lug 23 in a targeted manner.

[0084] In some embodiments, as Figures 13 to 20 As shown, Figure 13 Shown Figure 9 The exploded view of part of the fog screen structure is shown. Figure 14 Shown Figure 13 The enlarged image of point F in the middle, Figure 15 Shown Figure 9 The front view of the fog screen is shown. Figure 16 Shown Figure 15 The sectional view along the section line BB, Figure 17 Shown Figure 16 Enlarged view of point G in the middle. Figure 18 Shown Figure 9 The top view of the fog screen shown, Figure 19 Shown Figure 18 The sectional view taken along the section line CC, Figure 20 Shown Figure 19 Enlarged view of point H in the middle. A second through hole 1d is provided on the side wall of the limiting groove 1b, and the installation shaft 11 is provided through the second through hole 1d; the housing 1 is provided with a first limiting block 12 and a second limiting block 13 that fit together, the first limiting block 12 is fixedly connected to the housing 1, and the second limiting block 13 abuts against the end face of the installation shaft 11, and the first limiting block 12 and the second limiting block 13 are detachably connected. It is achievable that the installation shaft 11 can be detachably connected by the detachably connected first limiting block 12 and second limiting block 13. By providing the second through hole 1d, it is further possible to detachably connect the protective cover 2 provided with the lug 23 relative to the housing 1 by disassembling the installation shaft 11.

[0085] In some embodiments, the first limiting block 12 is fixedly connected to the housing 1 .

[0086] In some embodiments, the first limiting block 12 is a convex block and the second limiting block 13 is a concave block, and the two are interlocked. In other embodiments, the first limiting block 12 is a concave block and the second limiting block 13 is a convex block, and the two are interlocked.

[0087] In some embodiments, as Figure 14 As shown, the first stopper 12 has a recess 12a that engages with the portion of the mounting shaft 11 protruding from the first through hole 23a. The second stopper 13 has a protrusion 131 that fits against the end face of the mounting shaft 11.

[0088] In some embodiments, the shell 1 is further provided with a fastener 14, the first limit block 12 is further provided with a first fixing hole 12b, and the second limit block 13 is further provided with a second fixing hole 13a. The fastener 14 passes through the first fixing hole 12b and the second fixing hole 13a, thereby realizing a detachable connection between the first limit block 12 and the second limit block 13.

[0089] In some embodiments, the opening direction of the first fixing hole 12 b and the second fixing hole 13 a is parallel to the direction from the first limiting block 12 to the second limiting block 13 .

[0090] In some embodiments, the fastener 14 includes a bolt, a screw, a screw, a clamp, a snap or a magnetic fastener. In one example, the fastener 14 can be a bolt.

[0091] In some embodiments, as Figure 11 As shown, the protective cover 2 includes a cover plate 21 and side panels 221 and 222 connected to the sides of the cover plate 21. The housing 1 has a storage space 1e for accommodating the side panels 221 and 222. When the protective cover 2 is in the covering state, the side panels 221 and 222 are located in the storage space 1e. When the protective cover is in the hovering state, the side panels 221 and 222 are located between the housing 1 and the cover plate 21 and on the sides of the observation window 1a. The addition of the side panels 221 and 222 can further prevent ambient light from the sides of the observation window 1a from entering the surface of the observation window 1a and causing reflections or other effects, while also further blocking dust.

[0092] In some embodiments, when the protective cover 2 is in the covering state, the orthographic projections of the side panels 221 and 222 on the inner surface of the housing 1 fall onto the inner surface of the housing 1 .

[0093] In some embodiments, a certain angle is formed between the cover plate 21 and the side plates 221 and 222 , and the angle ranges from 60° to 120°.

[0094] In some embodiments, the angle may be 60°, 70°, 80°, 90°, 100°, 110°, or 120°.

[0095] In some embodiments, the protective cover 2 includes two oppositely disposed side panels 221 and 222 , wherein the side panel 221 on one side is connected to one side of the cover panel 21 , and the side panel 222 on the other side is connected to the other side of the cover panel 21 .

[0096] In some embodiments, as Figure 11 As shown, the housing 1 is provided with a groove 1c. When the protective cover 2 is in the covering state, part of the edge of the cover plate 21 is located in the groove 1c, so that the user can put his hand into the groove 1c to change the state of the protective cover 2.

[0097] In some embodiments, the edge of the protective cover 2 engages with the edge of the observation window 1a, and the groove 1c is disposed outside the edge of the observation window 1a and adjacent to the edge of the observation window 1a. In other embodiments, the coverage area of ​​the protective cover 2 is larger than the window area of ​​the observation window 1a (not shown), and the groove 1c is disposed on the surface of the housing 1 and spaced apart from the observation window 1a.

[0098] In some embodiments, as Figures 1 to 3 or Figures 9 and 10 As shown, the fog screen is provided with a support 4 for supporting the housing 1. In other embodiments, such as Figure 11 As shown, the fog screen is provided with a plurality of legs 5 for supporting the housing 1 .

[0099] In some embodiments, the support 4 and the housing 1 are fixedly connected, detachably connected, or hinged.

[0100] In some embodiments, as Figures 1 to 3 or Figures 9 and 10 As shown, the fog screen is provided with a connection port 6, which is used to connect an external device.

[0101] In some embodiments, the connection port 6 includes a headphone jack, a USB jack, an HDMI jack, or a power jack, and the external device includes, for example, a headphone, a mobile phone, a computer, an IPAD, a television, or a power supply.

[0102] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0103] In the embodiment of the present application, the circle is not a perfect circle in the strict sense, but may be an approximate circle, such as an ellipse, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges, and deformations.

[0104] In the embodiments of the present application, "parallel" refers to a state where the angle formed by two straight lines is greater than -10° and less than 10°, and thus also includes a state where the angle is greater than -5° and less than 5°. Furthermore, "perpendicular" refers to a state where the angle formed by two straight lines is greater than 80° and less than 100°, and thus also includes a state where the angle is greater than 85° and less than 95°.

Claims

1. A fog screen, characterized in that: include: a housing having an observation window; a protective cover, rotatably connected to the housing and used to shield the observation window; The matching structure matches the protective cover so that the protective cover has a covering state for shielding the observation window and a hovering state for exposing the observation window.

2. The fog screen according to claim 1, characterized in that: The matching structure includes a first fixing plate, a first magnetic component and a second magnetic component. The first fixing plate is connected to the shell, the protective cover is located between the first fixing plate and the observation window, the first magnetic component is connected to the first fixing plate, and the second magnetic component is connected to the protective cover.

3. The fog screen according to claim 2, characterized in that: The matching structure further includes a second fixing plate for shielding ambient light, wherein the second fixing plate is connected between the first fixing plate and the housing and is located on a side of the observation window.

4. The fog screen according to claim 2, characterized in that: The first magnetic member is disposed on a side of the first fixing plate close to the protective cover, and the second magnetic member is disposed on a side of the protective cover close to the first fixing plate.

5. The fog screen according to claim 1, characterized in that: The mating structure includes a friction member, one of the two opposite side surfaces of the friction member abuts against the protective cover, and the other side abuts against the shell, so that when the protective cover rotates relative to the shell, friction is generated between the protective cover and the friction member, allowing the protective cover to have multiple hovering states.

6. The fog screen according to claim 5, characterized in that: The protective cover is provided with a support ear, and the support ear is provided with a first through hole. The shell is provided with a limiting groove for accommodating the support ear, and a mounting shaft connected to the shell is provided in the limiting groove. The mounting shaft passes through the first through hole, and the support ear can rotate relative to the mounting shaft; the friction member is provided in the limiting groove, and one of the opposite sides of the friction member abuts against the groove wall of the limiting groove, and the other side abuts against the support ear.

7. The fog screen according to claim 6, characterized in that: The friction members are respectively provided on opposite sides of the support ear, and the two friction members are respectively in contact with the side surfaces of the limiting groove.

8. The fog screen according to claim 6, characterized in that: The friction member is provided with a mounting hole, and the mounting shaft passes through the mounting hole.

9. The fog screen according to claim 6, characterized in that: The side wall of the limiting groove is provided with a second through hole, and the installation shaft is set through the second through hole; the shell is provided with a first limiting block and a second limiting block that are embedded in each other, the first limiting block is fixedly connected to the shell, and the second limiting block abuts against the end face of the installation shaft, and the first limiting block and the second limiting block are detachably connected.

10. The fog screen according to claim 5, characterized in that: The protective cover includes a cover plate and a side plate connected to the side of the cover plate, and the shell has a storage space for accommodating the side plate; when the protective cover is in the covering state, the side plate is located in the storage space; when the protective cover is in the hovering state, the side plate is located between the shell and the cover plate and on the side of the observation window.

11. The fog screen according to claim 1, characterized in that: The housing is provided with a groove, and when the protective cover is in the covering state, part of the edge of the protective cover is located in the groove.

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