Projector protection box
By designing an anti-shake mechanism in the projector protective box, the rotation of the anti-shake turntable keeps the lifting platform still, the problem of the projector shaking due to vibration and wind outdoors is solved, and the stability and use effect of the projected image are improved.
Patent Information
- Application Number
- CN202510039347.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-04-15
AI Technical Summary
Projectors installed outdoors are easily affected by vibration and wind, which leads to shaking of the screen and affects the use effect.
A projector protective box is designed, including a hoisting platform and anti-shake mechanism. The anti-shake mechanism includes an anti-shake bracket, a driving motor and an anti-shake turntable. Through the rotation of the anti-shake turntable, the principle similar to the gyroscope is used to keep the lifting platform still and avoid the projector from shaking.
Effectively prevent the projector from shaking when the box is shaken, ensure the projection screen is stable, and improve the use effect.
Smart Images
Figure CN119828775A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of protective equipment, and in particular relates to a projector protective box. Background Art
[0002] A projector is a device that can project images or videos onto a target area. It can be connected to corresponding devices through different interfaces to play video signals. Projectors are widely used in indoor environments such as homes and offices. With the expansion of usage demand, more and more projectors are used outdoors, such as parks and scenic spots. When projectors are used in outdoor scenes, they cannot be directly exposed to the environment, otherwise they are easily damaged. Generally, a protective box is set up and the projector is installed in the protective box to protect the projector.
[0003] In some application scenarios, such as when the projector is installed on a bridge or on the water (ship), there will be large vibrations or shaking, or when the wind is strong, it will also shake, causing the projected image to shake, affecting the use effect. Summary of the invention
[0004] In view of this, the present invention provides a projector protection box, which can prevent the projector from shaking when the box body shakes, so as to ensure the use effect of the projector.
[0005] To achieve the above objectives, the present invention provides the following technical solutions.
[0006] 1. Projector protective box, including: A box body, used for placing the projector; Also includes: The hanging platform is movably installed on the top of the box, and the projector is fixed in the hanging platform; The anti-shake mechanism is used to prevent the lifting platform from shaking. The anti-shake mechanism includes an anti-shake bracket, a drive motor and an anti-shake turntable. The anti-shake bracket is installed at the bottom of the lifting platform, the drive motor is installed on the anti-shake bracket, and the anti-shake turntable is connected to the motor shaft of the drive motor and rotates with the motor shaft to keep the lifting platform stationary when the box shakes.
[0007] When the cabinet shakes, the anti-shake turntable rotates driven by the drive motor. The rotating anti-shake turntable adopts a principle similar to that of a gyroscope to achieve stable anti-shake effect. Therefore, the lifting platform can remain motionless, preventing the projector from shaking with the cabinet, causing the picture to shake and affecting the use effect.
[0008] 2. Based on technical solution 1, the anti-shake bracket is movably installed at the bottom of the lifting platform; The projector case also includes: A center of gravity adjustment mechanism is installed on the lifting platform to change the center of gravity of the lifting platform; Telescopic cantilevers, at least three of which are evenly installed between the anti-shake bracket and the lifting platform, and each telescopic cantilever can be unlocked and extended to change the length, or can be locked to keep the length unchanged; When the center of gravity adjustment mechanism adjusts the inclination angle of the lifting platform, the telescopic cantilever is unlocked, and each telescopic cantilever is extended or retracted under the gravity of the anti-shake mechanism to keep the anti-shake turntable horizontal. After the inclination angle of the lifting platform is adjusted, the telescopic cantilever is locked to fix the anti-shake mechanism and the lifting platform.
[0009] 3. On the basis of Technical Solution 2, the center of gravity adjustment mechanism includes a counterweight assembly, which is provided with multiple groups and evenly installed on the top of the lifting platform; each group of counterweight assemblies includes a counterweight block and a counterweight push rod, one end of the counterweight push rod is connected to the lifting platform, and the other end is connected to the counterweight block. The counterweight push rod is retractable to change the center of gravity of the lifting platform when driving the counterweight block to move.
[0010] 4. Based on technical solution 2, the telescopic cantilever includes: The telescopic oil cylinder is provided with an adjusting piston rod, which is slidably installed in the telescopic oil cylinder, and the oil chamber of the telescopic oil cylinder is divided into an upper oil chamber and a lower oil chamber. The cylinder body of the telescopic oil cylinder is movably connected to the lifting platform, and the adjusting piston rod is movably connected to the anti-shake bracket; Adjust the oil pipe to connect the upper oil chamber and the lower oil chamber; The solenoid valve is installed on the adjusting oil pipe and is used to unlock or lock the adjusting piston rod to achieve the extension and retraction of the telescopic cantilever or lock the length of the telescopic cantilever.
[0011] 5. Based on Technical Solution 1, it also includes a swing limiting mechanism, which is installed under the anti-shake bracket to reduce the swing amplitude of the projector when the box shakes.
[0012] 6. Based on technical solution 5, the swing limiting mechanism includes: A water tank is arranged at the bottom of the box and contains water; The buoyancy platform floats on the water surface of the water tank and is elastically connected to the inner wall of the water tank; A pressure plate is placed on the upper surface of the buoyancy platform and fits closely; The swing limiting push rod has one end connected to the pressure plate and the other end connected to the anti-shake bracket, and can drive the pressure plate to move up and down; When the turntable stops rotating, the swing limiting push rod drives the pressure plate to press on the upper surface of the buoyancy platform and keep it relatively motionless, so that when the box body shakes, the swing of the hoisting platform is restrained through the buoyancy platform to reduce the swing amplitude of the projector.
[0013] 7. On the basis of technical solution 6, the upper surface of the buoyancy platform and the lower surface of the pressure plate are provided with braking protrusions to increase the restraining force of the buoyancy platform on the pressure plate when the buoyancy platform and the pressure plate are in contact.
[0014] 8. Based on technical solution 6, the swing limiting mechanism also includes an annular waterproof cloth, which is put on the outside of the buoyancy platform, the inner side of the annular waterproof cloth is connected to the outer circular wall of the buoyancy platform, and the outer side of the annular waterproof cloth is connected to the inner wall of the water tank. The annular waterproof cloth covers the water surface to prevent the water in the water tank from shaking out. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the projector protection box of the present invention.
[0016] Figure 2 This is a structural schematic diagram of the projector being hoisted on the top plate of the casing.
[0017] Figure 3 This is a schematic diagram of the structure of the projector protection box of the present invention without the outer shell.
[0018] Figure 4 It is the structural diagram of the swing limiting mechanism.
[0019] The accompanying drawings are marked as follows: Box body 1, projection opening 11, top plate 12; Lifting platform 2; first universal joint 3; Anti-shake mechanism 4, anti-shake bracket 41, drive motor 42, anti-shake turntable 43; Center of gravity adjustment mechanism 5, counterweight assembly 51, counterweight block 511, counterweight push rod 512; Telescopic boom 6, telescopic oil cylinder 61, regulating piston rod 611, upper oil chamber 612, lower oil chamber 613, regulating oil pipe 62, solenoid valve 63; Second universal joint 7; The swing limiting mechanism 8 , the water tank 81 , the buoyancy platform 82 , the pressure plate 83 , the swing limiting push rod 84 , the return spring 85 , and the annular waterproof cloth 86 . DETAILED DESCRIPTION
[0020] The present invention is described in detail below in conjunction with specific embodiments.
[0021] See also Figure 1 and Figure 2 The projector protection box of this embodiment includes a box body 1 and a hanging platform 2. The hanging platform 2 is movably mounted on the top plate 12 of the box body 1 via a first universal joint 3. The projector is fixed in the hanging platform 2. The box body 1 is provided with a projection opening 11. The projector can project images outward from the projection opening 11 on the box body 1 for viewing. Figure 2As shown, the projector protection box also includes an anti-shake mechanism 4 for preventing the hanging platform 2 from shaking. The anti-shake mechanism 4 includes an anti-shake bracket 41, a drive motor 42 and an anti-shake turntable 43. The anti-shake bracket 41 is installed at the bottom of the hanging platform 2, and the drive motor 42 is installed on the anti-shake bracket 41. The anti-shake turntable 43 is connected to the motor shaft of the drive motor 42 and rotates with the motor shaft, so that the hanging platform 2 can be kept stationary when the box 1 shakes. When the box 1 shakes, the anti-shake turntable 43 rotates under the drive of the drive motor 42. The rotating anti-shake turntable 43 adopts a principle similar to that of a gyroscope to play a role in stabilizing and preventing shaking, so the hanging platform 2 can remain stationary, preventing the projector from shaking with the box 1 when the box 1 shakes, causing the picture to shake and affecting the use effect.
[0022] When the projector is installed outdoors, due to the limitation of the installation location or to meet some inclined projection angle requirements, the projector needs to be tilted for projection, such as Figure 2 and Figure 3 As shown, the projector protection box of this embodiment also includes a gravity center adjustment mechanism 5, which is installed on the hoisting platform 2 and is used to change the gravity center of the hoisting platform 2 and the projector. The hoisting platform 2 is installed in the protection box through the first universal joint 3. The gravity center adjustment mechanism 5 can be used to adjust the gravity center of the hoisting platform 2 and the projector to make the hoisting platform 2 and the projector tilt, so that the tilt angle of the projector can be adjusted to meet the needs of some tilted projection angles.
[0023] Specifically, if Figure 3 As shown, the center of gravity adjustment mechanism 5 of this embodiment includes a counterweight assembly 51, and the counterweight assembly 51 is provided with four groups, and is respectively installed at the front, rear, left and right positions of the top of the hanging platform 2; each group of counterweight assemblies 51 includes a counterweight block 511 and a counterweight push rod 512, one end of the counterweight push rod 512 is connected to the hanging platform 2, and the other end is connected to the counterweight block 511. When the projector needs to be tilted for projection, the counterweight push rod 512 can be extended or retracted to change the position of the counterweight block 511, thereby adjusting the center of gravity of the hanging platform 2 and the projector to adjust the tilt angle of the projector to meet the use requirements. However, when the hoisting platform 2 is tilted, the anti-shake mechanism 4 will be tilted together, and the anti-shake function cannot be exerted. Therefore, no matter how the hoisting platform 2 is tilted, the anti-shake mechanism 4 needs to remain horizontal, that is, the rotation axis of the anti-shake turntable 43 needs to be perpendicular to the horizontal plane. Figure 2 and Figure 3As shown, the anti-shake bracket 41 of the present embodiment is connected to the hoisting platform 2 via the second universal joint 7 and multiple telescopic cantilevers 6. There are at least three telescopic cantilevers 6, preferably four. The four telescopic cantilevers 6 are respectively installed at the front, rear, left and right positions between the anti-shake bracket 41 and the hoisting platform 2, and are opposite to each group of counterweight assemblies 51. Each telescopic cantilever 6 can be unlocked and telescoped to change the length, or can be locked to keep the length unchanged; when the center of gravity adjustment mechanism 5 adjusts the inclination angle of the hoisting platform 2, each telescopic cantilever 6 is unlocked and can be freely extended and retracted. The anti-shake bracket 41 and the anti-shake turntable 43 generate tension or pressure on each telescopic cantilever 6 under the action of their own gravity, so that the telescopic cantilever 6 extends or retracts to adapt to the change of the spacing between the anti-shake bracket 41 and the hoisting platform 2 at different circumferential positions. During this process, the anti-shake bracket 41 and the anti-shake turntable 43 do not tilt with the hoisting platform 2 and always remain horizontal. After the tilt angle of the hoisting platform 2 is adjusted, the telescopic cantilever 6 is locked. At this time, the hoisting platform 2 and the anti-shake bracket 41 remain fixed under the connection of the telescopic cantilever 6, ensuring that the anti-shake mechanism 4 can keep the hoisting platform 2 from shaking when in use.
[0024] Specifically, Figure 2 and Figure 3 As shown, the telescopic boom 6 of the present embodiment includes a telescopic oil cylinder 61, an adjusting oil pipe 62 and a solenoid valve 63. The telescopic oil cylinder 61 is provided with an adjusting piston rod 611, and the adjusting piston rod 611 is slidably installed in the telescopic oil cylinder 61, and the oil chamber of the telescopic oil cylinder 61 is divided into an upper oil chamber 612 and a lower oil chamber 613. The cylinder body of the telescopic oil cylinder 61 is movably connected to the hoisting platform 2, and the adjusting piston rod 611 is movably connected to the anti-shake bracket 41; the adjusting oil pipe 62 connects the upper oil chamber 612 and the lower oil chamber 613; the solenoid valve 63 is installed on the adjusting oil pipe 62, and is used to unlock or lock the adjusting piston rod 611, so as to realize the telescopic cantilever 6 extension or lock the length of the telescopic cantilever 6. When the center of gravity adjustment mechanism 5 adjusts the tilt angle of the hoisting platform 2, the solenoid valve 63 is unlocked, and the hydraulic oil in the upper oil chamber 612 / lower oil chamber 613 flows to the lower oil chamber 613 / upper oil chamber 612 through the adjustment oil pipe 62, and the adjustment piston rod 611 extends / retracts the telescopic oil cylinder 61 to achieve the telescopic boom 6. After the tilt angle of the hoisting platform 2 is adjusted, the solenoid valve 63 is locked, and the hydraulic oil in the upper oil chamber 612 and the lower oil chamber 613 cannot flow, and the telescopic boom 6 is locked and cannot be extended to change the length.
[0025] After the projector is shut down and powered off, the anti-shake turntable 43 also stops rotating and cannot realize the anti-shake function. Since the projector is suspended, it will swing due to the shaking of the box 1. Its swing may resonate with the shaking of the box 1, causing the swing amplitude to become larger and larger until it hits the side wall of the box 1, affecting the service life of the projector. Figure 3 and Figure 4As shown, this embodiment further includes a swing limiting mechanism 8, which is installed below the anti-shake bracket 41 to reduce the swing amplitude of the projector when the box 1 shakes. The swing limiting mechanism 8 is used to reduce the swing amplitude of the hoisting platform 2, thereby reducing the swing amplitude of the projector. Specifically, as Figure 4 As shown, the swing limiting mechanism 8 includes a water tank 81, a buoyancy platform 82, a pressure plate 83 and a swing limiting push rod 84. The water tank 81 is arranged at the bottom of the box body 1 and is filled with water; the buoyancy platform 82 floats on the water surface of the water tank 81 and is elastically connected to the inner wall of the water tank 81 via a reset spring 85; the pressure plate 83 is placed on the upper surface of the buoyancy platform 82 and fits it; one end of the swing limiting push rod 84 is connected to the pressure plate 83, and the other end is connected to the anti-shake bracket 41, and can drive the pressure plate 83 to move up and down; when the turntable stops rotating, the swing limiting push rod 84 drives the pressure plate 83 to press on the upper surface of the buoyancy platform 82 and keep it relatively motionless, so that when the box body 1 shakes, the swing of the hoisting platform 2 is restrained via the buoyancy platform 82 to reduce the swing amplitude of the projector. Among them, the upper surface of the buoyancy platform 82 and the lower surface of the pressure plate 83 are both provided with braking protrusions, which can increase the friction between the buoyancy platform 82 and the pressure plate 83, so as to increase the restraining force of the buoyancy platform 82 on the pressure plate 83 when the buoyancy platform 82 and the pressure plate 83 are in contact. The box body 1 may be tilted during the installation process, so a water tank 81 filled with water is provided in the box body 1, so that no matter how the box body 1 is tilted, the floating platform floating in the water tank 81 is horizontal, and the anti-shake bracket 41 is horizontal. When the swing limiting push rod 84 is installed below the anti-shake bracket 41, the swing limiting push rod 84 is perpendicular to the horizontal plane, so that when the swing limiting push rod 84 is pressed on the upper surface of the floating platform, it can be completely in contact with the floating platform and remain horizontal. When the box 1 shakes, the buoyancy platform 82 can only shake within a small range, and the swing limiting push rod 84 and the pressure plate 83 form a "T"-shaped structure. This design makes it impossible for the pressure plate 83 to detach from the platform when it fits the surface of the buoyancy platform 82. The swing limiting push rod 84 can only shake within a small range under the restraint of the buoyancy platform 82, thereby generating a restraining force on the anti-shake mechanism 4 and the hoisting platform 2, reducing the amplitude of the projector's swing, avoiding collisions between the projector and the box 1, and affecting the service life of the projector. When the projector is powered on and used, the swing limiting push rod 84 retracts and drives the pressure plate 83 to detach from the surface of the buoyancy platform 82, so as to avoid the buoyancy platform 82 driving the projector to swing when the box 1 shakes, affecting the projection effect.
[0026] like Figure 4 As shown, the swing limiting mechanism 8 of this embodiment also includes an annular waterproof cloth 86, which is sleeved over the buoyancy platform 82. The inner side of the annular waterproof cloth 86 is connected to the outer circular wall of the buoyancy platform 82, and the outer side of the annular waterproof cloth 86 is connected to the inner wall of the water tank. The annular waterproof cloth 86 covers the water surface to prevent the water in the water tank from shaking out.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.
Claims
1. Projector protective box, including: A box body, used for placing the projector; It is characterized by further comprising: The hanging platform is movably installed on the top of the box, and the projector is fixed in the hanging platform; The anti-shake mechanism is used to prevent the lifting platform from shaking. The anti-shake mechanism includes an anti-shake bracket, a drive motor and an anti-shake turntable. The anti-shake bracket is installed at the bottom of the lifting platform, the drive motor is installed on the anti-shake bracket, and the anti-shake turntable is connected to the motor shaft of the drive motor and rotates with the motor shaft to keep the lifting platform stationary when the box shakes.
2. The projector protection box according to claim 1, characterized in that: The anti-shake bracket is movably installed at the bottom of the lifting platform; The projector case also includes: A center of gravity adjustment mechanism is installed on the lifting platform to change the center of gravity of the lifting platform; Telescopic cantilevers, at least three of which are evenly installed between the anti-shake bracket and the lifting platform, and each telescopic cantilever can be unlocked and extended to change the length, or can be locked to keep the length unchanged; When the center of gravity adjustment mechanism adjusts the inclination angle of the lifting platform, the telescopic cantilever is unlocked, and each telescopic cantilever is extended or retracted under the gravity of the anti-shake mechanism to keep the anti-shake turntable horizontal. After the inclination angle of the lifting platform is adjusted, the telescopic cantilever is locked to fix the anti-shake mechanism and the lifting platform.
3. The projector protection box according to claim 2, characterized in that: The center of gravity adjustment mechanism includes a counterweight assembly, which is provided with multiple groups and is evenly installed on the top of the lifting platform; each group of counterweight assemblies includes a counterweight block and a counterweight push rod, one end of the counterweight push rod is connected to the lifting platform, and the other end is connected to the counterweight block. The counterweight push rod is retractable to change the center of gravity of the lifting platform when driving the counterweight block to move.
4. The projector protection box according to claim 2, characterized in that: Telescopic boom includes: The telescopic oil cylinder is provided with an adjusting piston rod, which is slidably installed in the telescopic oil cylinder, and the oil chamber of the telescopic oil cylinder is divided into an upper oil chamber and a lower oil chamber. The cylinder body of the telescopic oil cylinder is movably connected to the lifting platform, and the adjusting piston rod is movably connected to the anti-shake bracket; Adjust the oil pipe to connect the upper oil chamber and the lower oil chamber; The solenoid valve is installed on the adjusting oil pipe and is used to unlock or lock the adjusting piston rod to achieve the extension and retraction of the telescopic cantilever or lock the length of the telescopic cantilever.
5. The projector protection box according to claim 1, characterized in that: It also includes a swing limiting mechanism, which is installed below the anti-shake bracket to reduce the swing amplitude of the projector when the box shakes.
6. The projector protection box according to claim 5, characterized in that: The swing limiting mechanism includes: A water tank is arranged at the bottom of the box and contains water; The buoyancy platform floats on the water surface of the water tank and is elastically connected to the inner wall of the water tank; A pressure plate is placed on the upper surface of the buoyancy platform and fits closely; The swing limiting push rod has one end connected to the pressure plate and the other end connected to the anti-shake bracket, and can drive the pressure plate to move up and down; When the turntable stops rotating, the swing limiting push rod drives the pressure plate to press on the upper surface of the buoyancy platform and keep it relatively motionless, so that when the box body shakes, the swing of the hoisting platform is restrained through the buoyancy platform to reduce the swing amplitude of the projector.
7. The projector protection box according to claim 6, characterized in that: The upper surface of the buoyancy platform and the lower surface of the pressure plate are both provided with braking protrusions, so as to increase the restraining force of the buoyancy platform on the pressure plate when the buoyancy platform and the pressure plate are in contact.
8. The projector protection box according to claim 6, characterized in that: The swing limiting mechanism also includes an annular waterproof cloth, which is put on the outside of the buoyancy platform, the inner side of the annular waterproof cloth is connected to the outer circular wall of the buoyancy platform, the outer side of the annular waterproof cloth is connected to the inner wall of the water tank, and the annular waterproof cloth covers the water surface to prevent the water in the water tank from shaking out.