Rear projection dome screen

Abstract

The utility model discloses a back projection dome screen, comprising a dome screen body, the bottom of which is fixedly provided with a connecting plate along the circumferential direction; the base is arranged below the connecting plate, a plurality of pairs of mounting grooves are formed in the top surface of the base in the circumferential direction at intervals, and each pair of mounting grooves are oppositely formed and are perpendicular to the radial direction of the base; the multiple pairs of limiting sliding blocks are arranged in the multiple pairs of mounting grooves in a one-to-one correspondence mode, each pair of limiting sliding blocks is driven by a driving assembly to move up and down, and the top faces of each pair of limiting sliding blocks are inclined faces inclining towards the adjacent limiting sliding blocks; the connecting plate is detachably connected with the base through the multiple pairs of limiting sliding blocks. The installation structure has the advantages that alignment is not needed in the installation process of the dome screen body, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of vision of a flight simulator, and more specifically, to a rear projection ball screen. Background Art

[0002] The visual system is used to simulate the pilot's field of vision, present all the scenes related to the flight mission, including weather, outside the aircraft, in a panoramic manner to the pilot, help the pilot judge the speed, position, flight altitude, flight attitude, etc. of the aircraft, and simulate the flight conditions based on computer imaging and display them on the screen, so as to help the pilot realize the specialized system of flight training. The rear projection ball screen has been widely used in the visual system because of its large field of view and strong immersion. However, the existing rear projection ball screen still has many inconveniences in installation. For example, the utility model patent with the authorization announcement number CN 219179766 U discloses an immersive virtual simulation external projection and internal viewing rear projection ball screen, which has a flange installed at the bottom of the ball screen shell, and then the flange is fixedly connected to the base to fix the ball screen shell on the base. When the flange is fixedly connected to the base, it is necessary to align the flange with the base first, and then connect the flange with the base. When aligning, due to the large volume of the ball screen shell, it is inconvenient to move and the operation is very inconvenient. Utility Model Content

[0003] An object of the utility model is to provide a rear projection ball screen to at least solve the above problems.

[0004] In order to achieve the purpose and other advantages of the utility model, a rear-projection ball screen is provided, comprising: a ball screen body, a connecting plate is fixedly provided at the bottom along its circumference; a base, which is arranged below the connecting plate, and a plurality of pairs of mounting grooves are provided at intervals along its circumference on the top surface of the base, and each pair of mounting grooves is arranged opposite to each other and perpendicular to the radial direction of the base; a plurality of pairs of limit sliders are arranged in the plurality of pairs of mounting grooves in a one-to-one correspondence, each pair of limit sliders is driven by a driving assembly to move up and down, and the top surface of each pair of limit sliders is an inclined surface inclined toward the adjacent limit sliders; wherein the connecting plate is detachably connected to the base through the plurality of pairs of limit sliders.

[0005] Preferably, in the rear-projection ball screen, the ball screen body comprises a projection imaging layer, an epoxy resin reinforcement layer and an anti-glare layer from inside to outside, and the thickness of the epoxy resin reinforcement layer is 5 mm.

[0006] Preferably, for the rear projection spherical screen, the diameter of the spherical screen body is 3.5m.

[0007] Preferably, in the rear-projection spherical screen, the bottom surface of the connecting plate is in rolling contact with the top surface of the base.

[0008] Preferably, in the rear-projection ball screen, the driving assembly includes a motor, which is horizontally fixed on the base, the output shaft of the motor extends into a corresponding pair of mounting grooves and is rotatably connected to the side walls thereof, and the portion of the output shaft located in the mounting groove is fixedly provided with a first bevel gear; a pair of screw rods are vertically arranged in the corresponding pair of mounting grooves, the upper end of each screw rod extends into a preset threaded hole on the corresponding limit slider and is threadedly connected thereto, and the lower end is fixedly provided with a second bevel gear, and the second bevel gear is meshed with the first bevel gear; wherein the limit slider is slidably engaged with the side wall of the corresponding mounting groove up and down.

[0009] Preferably, for the rear-projection ball screen, two pairs of guide grooves are symmetrically provided on an opposite side wall of the mounting groove, the two guide grooves on each side wall are located on both sides of the screw rod, and the limiting slider is provided with two pairs of guide sliders cooperating with the two pairs of guide grooves, and each guide slider is slidably engaged with an adjacent guide groove.

[0010] The utility model at least has the following beneficial effects:

[0011] The utility model fixes a connection plate at the bottom of the ball screen body, arranges a plurality of pairs of installation grooves at intervals along the circumference of the top surface of the base, arranges a pair of limit sliders in each pair of installation grooves, and arranges the top surface of the limit sliders as an inclined surface. The limit sliders are driven up and down by a driving component. When installing the ball screen body, it is only necessary to place the ball screen body on the base, and then drive the limit sliders to move up slowly, so that the connection plate can be clamped between the pair of limit sliders to realize the connection between the ball screen body and the base. During the installation of the ball screen body, alignment is not required, and the operation is simple.

[0012] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall cross-sectional structure of a rear projection ball screen according to an embodiment of the utility model;

[0014] Figure 2 It is a top view schematic diagram of a base of an embodiment of the utility model;

[0015] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure in the initial state along the AA axis;

[0016] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure in the AA direction when connected to the connecting plate. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the embodiments and drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figure 1 to Figure 4 As shown, the utility model provides a rear-projection ball screen, comprising: a ball screen body 1, a connecting plate 2 is fixedly arranged at the bottom along its circumference; a base 3 is arranged below the connecting plate 2, and a plurality of pairs of mounting grooves 4 are arranged at intervals along its circumference on the top surface of the base 3, and each pair of mounting grooves 4 is arranged opposite to each other and perpendicular to the radial direction of the base 3; a plurality of pairs of limiting sliders 5 are arranged in the plurality of pairs of mounting grooves 4 in a one-to-one correspondence, and each pair of limiting sliders 5 is driven by a driving assembly to move up and down, and the top surface of each pair of limiting sliders 5 is an inclined surface inclined toward the adjacent limiting sliders 5; wherein the connecting plate 2 is detachably connected to the base 3 through the plurality of pairs of limiting sliders 5.

[0021] In the above embodiment, the rear projection ball screen includes a ball screen body 1 , a connecting plate 2 , a base 3 , a plurality of pairs of mounting grooves 4 and a plurality of pairs of limiting sliding blocks 5 . The ball screen body 1 is a spherical structure, with a bottom opening at its bottom and a side inlet at its side wall, which is connected to the bottom opening. The sizes of the bottom opening and the side inlet are set to meet the requirements of a large field of view. A connecting plate 2 is fixedly provided at the bottom of the ball screen body 1 along the edge of the bottom opening, and a base 3 is provided below the connecting plate 2. The width of the base 3 is at least 10 cm larger than the width of the connecting plate 2, so that the connecting plate 2 can be placed on the base 3 conveniently, so that the edge of the connecting plate 2 is located in the top surface of the base 3, and the top surface of the base 3 is provided with a plurality of pairs of mounting grooves 4 at intervals along its circumference, each pair of mounting grooves 4 is arranged oppositely and perpendicular to the radial direction of the base 3, and a pair of limiting sliders 5 is provided in each pair of mounting grooves 4, and each pair of limiting sliders 5 is driven up and down by a driving assembly, and the top surface of each pair of limiting sliders 5 is an inclined surface inclined toward the adjacent limiting sliders 5, and a polytetrafluoroethylene coating is sprayed on the inclined surface to reduce the friction between the inclined surface and the connecting plate 2, and further, the edge of the connecting plate 2 in contact with the inclined surface is provided with a chamfer matching the inclined surface. In the initial state, each pair of limit sliders 5 is located in the corresponding installation groove 4, and the top surface of the limit sliders 5 is not higher than the top surface of the base 3. In the connected state, each pair of limit sliders 5 extends out of the installation groove 4, and the connecting plate 2 is clamped between each pair of limit sliders 5 to realize the connection between the ball screen body 1 and the base 3.

[0022] The utility model fixes a connecting plate at the bottom of the ball screen body, arranges a plurality of pairs of mounting grooves at intervals along the circumference of the top surface of the base, arranges a pair of limit sliders in each pair of mounting grooves, and arranges the top surface of the limit sliders as an inclined surface. The limit sliders are driven up and down by a driving component. When installing the ball screen body, it is only necessary to place the ball screen body on the base, and then turn on the driving component so that the driving component drives the limit slider to move up slowly. The connecting plate can be adaptively adjusted under the action of the inclined surface of the limit slider, and finally be clamped between the pair of limit sliders, so that the connection between the ball screen body and the base is realized. The ball screen body does not need to be aligned during installation, and the operation is simple.

[0023] In another embodiment, the ball screen body 1 includes a projection imaging layer, an epoxy resin reinforcement layer and an anti-glare layer from the inside to the outside, the thickness of the epoxy resin reinforcement layer is 5 mm, the projection imaging layer and the anti-glare layer are evenly sprayed on the epoxy resin reinforcement layer to ensure uniform gain across the entire field of view, no visible color, brightness inconsistency, no solar effect, and the epoxy resin reinforcement layer provides structural support for the ball screen.

[0024] Furthermore, the diameter of the spherical screen body 1 is 3.5 m, and the large-sized spherical screen body can further enhance the immersive feeling of the spherical screen.

[0025] In another embodiment, the bottom surface of the connecting plate 2 is in rolling contact with the top surface of the base 3 to reduce the friction between the connecting plate and the base, so as to facilitate adaptive adjustment of the position of the connecting plate under the action of the limit slider. Specifically, the rolling contact method includes but is not limited to evenly embedding movable balls on the bottom surface of the connecting plate, or evenly embedding movable balls on the top surface of the base.

[0026] In another embodiment, Figure 3 , Figure 4 As shown, the driving assembly includes a motor 6, which is horizontally fixed on the base 3, the output shaft of the motor 6 extends into the corresponding pair of mounting grooves 4 and is rotatably connected to the side wall thereof through a bearing, and the portion of the output shaft located in the mounting groove 4 is fixedly provided with a first bevel gear; a pair of screw rods 7, which are vertically arranged in the corresponding pair of mounting grooves 4, the upper end of each screw rod 7 extends into a preset threaded hole 8 on the corresponding limit slider 5 and is threadedly connected thereto, and the lower end is fixedly provided with a second bevel gear 9, and the second bevel gear 9 is meshed with the first bevel gear; wherein the limit slider 5 is slidably engaged with the side wall of the corresponding mounting groove 4 up and down.

[0027] The above embodiment lists a preferred structure of a driving assembly, including a motor 6, two first bevel gears, a pair of screws and two second bevel gears, wherein the motor 6 is a forward and reverse motor, preferably a forward and reverse stepping motor. The motor drives the first bevel gear, the first bevel gear drives the second bevel gear, and the second bevel gear drives the screw to rotate, so that the limit slider threadedly connected to the screw can be driven to slide up and down along the side wall of the installation groove, with a simple structure and stable driving.

[0028] Furthermore, if Figure 3 , Figure 4 As shown, two pairs of guide slots 10 are symmetrically arranged on one opposite side wall of the mounting slot 4, and the two guide slots 10 on each side wall are located on both sides of the screw rod 7. The limiting slider 5 is provided with two pairs of guide sliders that cooperate with the two pairs of guide slots 10, and each guide slider is slidably engaged with the adjacent guide slots 10. Here, by providing two pairs of guide slots and two pairs of guide sliders, the limiting slider is prevented from twisting during the up and down movement, thereby further improving the stability of the device.

[0029] The number of devices and processing scale described here are used to simplify the description of the utility model. The application, modification and variation of the rear projection ball screen of the utility model are obvious to those skilled in the art.

[0030] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Rear projection ball screen, characterized in that: include: The bottom of the ball screen body is fixed with a connecting plate along its circumference; A base, which is arranged below the connecting plate, wherein a plurality of pairs of mounting grooves are arranged at intervals along the circumference of the top surface of the base, and each pair of mounting grooves are arranged opposite to each other and perpendicular to the radial direction of the base; A plurality of pairs of limit sliders are arranged in the plurality of pairs of mounting grooves in a one-to-one correspondence, each pair of limit sliders is driven by a driving assembly to move up and down, and the top surface of each pair of limit sliders is an inclined surface inclined toward the adjacent limit sliders; wherein, The connecting plate is detachably connected to the base via the multiple pairs of limiting sliding blocks.

2. The rear projection ball screen according to claim 1, characterized in that: The ball screen body comprises a projection imaging layer, an epoxy resin reinforcement layer and an anti-glare layer from the inside to the outside, and the thickness of the epoxy resin reinforcement layer is 5 mm.

3. The rear projection ball screen according to claim 2, characterized in that: The diameter of the spherical curtain body is 3.5m.

4. The rear projection ball screen according to claim 1, characterized in that: The bottom surface of the connecting plate is in rolling contact with the top surface of the base.

5. The rear projection ball screen according to claim 1, characterized in that: The driving assembly includes a motor, which is horizontally fixed on the base, the output shaft of the motor extends into a corresponding pair of mounting grooves and is rotatably connected to the side walls thereof, and a first bevel gear is fixedly arranged on the portion of the output shaft located in the mounting groove; a pair of screw rods are vertically arranged in the corresponding pair of mounting grooves, the upper end of each screw rod extends into a preset threaded hole on the corresponding limit slider and is threadedly connected thereto, and a second bevel gear is fixedly arranged on the lower end, and the second bevel gear is meshed with the first bevel gear; wherein the limit slider is slidably engaged with the side wall of the corresponding mounting groove up and down.

6. The rear projection ball screen according to claim 5, characterized in that: Two pairs of guide slots are symmetrically arranged on an opposite side wall of the mounting slot, the two guide slots on each side wall are located on both sides of the screw rod, and the limiting slider is provided with two pairs of guide sliders cooperating with the two pairs of guide slots, and each guide slider is slidably engaged with an adjacent guide slot.

Images