Anti-inclination ground-rising projection screen

Abstract

An anti-tilt ground lifting projection screen belongs to the technical field of display and comprises a base, a screen sheet, a lifting mechanism, an upper cross beam and a plurality of pull ropes. A first winding mechanism and a second winding mechanism are arranged on the base, the first winding mechanism is connected with one side edge of the curtain sheet, and the other side edge of the curtain sheet is connected with the upper cross beam; one end of the lifting mechanism is connected with the upper cross beam, and the other end of the lifting mechanism is connected with the base; one end of the pull rope is connected with the second winding mechanism, and the other end of the pull rope is connected with the upper cross beam; the lifting mechanism and the pull rope are located on one side of the back face of the curtain piece. According to the invention, the pull rope is arranged on the back surface of the screen sheet, and the force for enabling the ground-lifting projection screen to incline backwards is provided for the pull rope through the second winding mechanism, so that the problem that the ground-lifting projection screen inclines forwards in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection display, in particular to a kind of anti-inclination ground projection screen. BACKGROUND

[0002] Ground projection screen can be stored, can be easily carried to various occasions and be unfolded for use, so it is loved by consumers.The ground projection screen of prior art inevitably causes the angle between the force of winding mechanism and lifting mechanism to the screen due to the limitation of its own mechanical structure distribution.

[0003] Figure 1 It is a schematic diagram of the ground projection screen of prior art.As shown in FIG. Figure 1 The force of lifting mechanism 30 to the screen 20 is upward along vertical direction, and the force of winding mechanism 100 to the screen 20 has forward component;As shown in FIG. Figure 1 The forward component of the force of winding mechanism to the screen causes the whole screen 20 and lifting mechanism 30 to incline forward, which leads to the deformation of projection picture and seriously affects the viewing of projection picture.Therefore, it is urgent to solve the problem of inclination of the ground projection screen. CONTENT OF THE INVENTION

[0004] To solve the above technical problems, the utility model discloses an anti-inclination ground projection screen, which sets a pull rope on the back of the screen, and provides a force for the pull rope to make the screen incline backward by the second winding mechanism, solves the problem of forward inclination of the screen, and obtains a flat ground projection screen.

[0005] The specific technical scheme of the utility model is as follows:

[0006] An anti-inclination ground projection screen, comprising: a base, a screen, a lifting mechanism, an upper cross beam and a plurality of pull ropes; the base is provided with a first winding mechanism and a second winding mechanism, the first winding mechanism is connected with one side of the screen, and the other side of the screen is connected with the upper cross beam; one end of the lifting mechanism is connected with the upper cross beam, and the other end is connected with the base; one end of the pull rope is connected with the second winding mechanism, and the other end is connected with the upper cross beam; the lifting mechanism and the pull rope are located on the back side of the screen, and the lifting mechanism is located between the screen and the pull rope.

[0007] The base is equipped with a first winding mechanism and a second winding mechanism. The first winding mechanism is connected to one side of the curtain panel, and the other side of the curtain panel is connected to the upper crossbeam. The first winding mechanism is mainly used to provide a force for winding the curtain panel, and this force acts forward, deviating from the vertical direction and diagonally downward. One end of the lifting mechanism is connected to the upper crossbeam, and the lifting mechanism is used to control the upward movement of the upper crossbeam. Through the connection between the upper crossbeam and the curtain panel, it provides a vertical upward force for the unfolding of the curtain panel. The other end is connected to the base, which facilitates the retraction of the curtain panel into the base. One end of the pull rope is connected to the second winding mechanism, and the other end is connected to the upper crossbeam. The second winding mechanism provides the pull rope to tighten the upper crossbeam, thereby transmitting the force to the screen and the lifting mechanism. The pull rope is located on the back side of the screen, and the lifting mechanism is located between the screen and the pull rope, so that the force of the pull rope deviates from the vertical direction and is obliquely downward. The backward component of this force in the horizontal direction cancels out the forward component of the force provided by the first winding mechanism for winding the screen in the horizontal direction, thereby solving the problem of the ground-lift projection screen tilting forward and obtaining a flat ground-lift projection screen.

[0008] The screen is rollable, which facilitates the rolling up and down of the floor-mounted projection screen. When needed, it can be rolled up for projection, and when not needed, it can be rolled up.

[0009] Preferably, a magnetic adhesive layer is attached to the back of the screen, and the pull cord is a ferromagnetic rope that is magnetically attracted to the magnetic adhesive layer.

[0010] The magnetic adhesive on the back of the curtain panel and the ferromagnetic pull cord have magnetic attraction properties, which further prevents the curtain panel surface from tilting forward through mutual attraction.

[0011] Preferably, there are at least two pull ropes, and the spacing between adjacent pull ropes is equal.

[0012] Two or more pull cords with equal spacing between them can provide a uniform backward force to the screen, preventing the screen surface from tilting and avoiding distortion.

[0013] Preferably, the lifting mechanism is a boom lifting mechanism or a hydraulic telescopic rod mechanism.

[0014] The lifting mechanism, either a boom lift or a hydraulic telescopic rod mechanism, can provide a stabilizing force to the curtain panel and retract it into the base.

[0015] Preferably, the first winding mechanism includes a first motor and a first winding rod, the first motor being connected to the first winding rod and driving the first winding rod to rotate; the second winding mechanism includes a second motor and a second winding rod, the second motor being connected to the second winding rod and driving the second winding rod to rotate.

[0016] The first and second winding mechanisms are driven by different motors, which can adjust the force exerted by the first winding mechanism on the curtain surface and the force exerted by the second winding mechanism on the pull rope, respectively, thereby optimizing the interaction of forces and better solving the problem of curtain surface tilt.

[0017] Preferably, the curtain panel is connected to the first winding rod, and the connection between the curtain panel, the first winding rod, and the upper crossbeam is by adhesive bonding or snap-fitting.

[0018] The curtain sheet can be glued to the first winding rod to form a stable structure, or it can be clipped onto the first winding rod to form a stable structure.

[0019] Preferably, one end of the pull rope is connected to the second winding rod, and the pull rope is connected to the second winding rod and the upper crossbeam by adhesive or snap-fit.

[0020] The pull rope and the second winding rod can be connected by adhesive or by snap-fit ​​to form a stable structure.

[0021] Preferably, the floor-mounted projection screen further includes a first connecting section and a second connecting section; one side of the first connecting section is connected to the upper crossbeam, and the other side is connected to the screen panel; one side of the second connecting section is connected to the first retracting rod, and the other side is connected to the screen panel.

[0022] The first connecting section is mainly used to connect the screen and the upper crossbeam, while the second connecting section is mainly used to connect the screen and the first rewind rod. Simultaneously, the design of the first and second connecting sections makes the floor-mounted projection screen more aesthetically pleasing. During rewinding, it also avoids direct contact between the screen's imaging display surface and the upper crossbeam and the first rewind rod, reducing the possibility of screen abrasion and further protecting the screen's imaging display surface.

[0023] Preferably, the first connecting segment and the second connecting segment are connected to the curtain sheet by adhesive bonding or sewing; the first connecting segment is connected to the upper crossbeam by adhesive bonding or snap-fitting; and the second connecting segment is connected to the first winding rod by adhesive bonding or snap-fitting.

[0024] The first and second connecting sections are made of flexible fiber materials, which can form a stable structure with the curtain sheet by adhesive bonding or by sewing. The upper crossbeam is made of metal, and the first connecting section can form a stable structure with it by adhesive bonding or by snap-fit. The second connecting section can form a stable structure with the second winding rod by adhesive bonding or by snap-fit.

[0025] Preferably, the screen is a white plastic screen, a metal screen, a glass bead screen, a Fresnel screen, a linear grating screen, or an optical subtitle screen. Attached Figure Description

[0026] Figure 1 A schematic diagram of a ground-mounted projection screen using existing technology;

[0027] Figure 2 This is a schematic diagram of a ground-mounted projection screen according to Embodiment 1 of this application;

[0028] Figure 3 This is a schematic diagram of another ground-mounted projection screen according to Embodiment 1 of this application;

[0029] Figure 4 This is a schematic diagram of the rope distribution in Embodiment 1 of this application;

[0030] Figure 5 This is a schematic diagram of the lifting mechanism according to Embodiment 1 of this application;

[0031] Figure 6 This is a schematic diagram of the winding mechanism inside the base in Embodiment 1 of this application;

[0032] Figure 7 This is a schematic diagram of the ground-lift curtain according to Embodiment 2 of this application.

[0033] Wherein: 1-Ground-lift projection screen; 10-Base; 100-Rolling mechanism; 101-First rolling mechanism; 1011-First motor; 1012-First rolling rod; 102-Second rolling mechanism; 1021-Second motor; 1022-Second rolling rod; 20-Screen panel; 201-First connecting section; 202-Second connecting section; 30-Lifting mechanism; 40-Upper crossbeam; 50-Pull rope; 60-Magnetic adhesive layer. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0035] Example 1

[0036] Figure 1 is a schematic diagram of a floor-mounted projection screen according to Embodiment 1 of this application. A floor-mounted projection screen 1 with anti-tilt capability includes: a base 10, a screen panel 20, a lifting mechanism 30, an upper crossbeam 40, and several pull ropes 50; the base 10 is provided with a first rewinding mechanism 101 and a second rewinding mechanism 102, the first rewinding mechanism 101 being connected to one side of the screen panel 20, and the other side of the screen panel 20 being connected to the upper crossbeam 40; one end of the lifting mechanism 30 is connected to the upper crossbeam 40, and the other end is connected to the base 10; one end of the pull ropes 50 is connected to the second rewinding mechanism 102, and the other end is connected to the upper crossbeam 40; the lifting mechanism 30 and the pull ropes 50 are located on one side of the back of the screen panel 20, with the lifting mechanism 30 located between the screen panel 20 and the pull ropes 50.

[0037] In this embodiment, the base 10 can be square, circular, or polygonal in shape. Its decorative edge (cover) is generally only used for concealed or embedded products. Its shape can be "L", "T", or irregular. A first winding mechanism 101 is provided on it. The first winding mechanism 101 is connected to one side of the screen 20. The first winding mechanism 101 is mainly used for winding the screen 20. The first winding mechanism 101 cooperates with the lifting mechanism 30 to control the lifting and lowering of the ground-mounted projection screen. The other side of the screen 20 is connected to the upper crossbeam 40. One end of the lifting mechanism 30 is connected to the upper crossbeam 40 to control the upper crossbeam 40 to move upward, thereby providing an upward force for the unfolding of the screen 20. The other end is connected to the base 10, which makes it easy to retract the screen 20 into the base 10.

[0038] In this embodiment, the screen 20 is rollable, which facilitates the rolling up and down of the ground-mounted projection screen. It can be unfolded for projection when needed and rolled up when not in use. The screen 20 includes an imaging display surface used for displaying images.

[0039] In this embodiment, a first winding mechanism 101 and a second winding mechanism 102 are provided on the base 10. The first winding mechanism 101 is connected to one side of the curtain panel 20, and the other side of the curtain panel 20 is connected to the upper crossbeam 40. The first winding mechanism 101 is mainly used to provide a force for winding the curtain panel 20, and the direction of this force is forward and deviates from the vertical direction, diagonally downward. One end of the lifting mechanism 30 is connected to the upper crossbeam 40, and the lifting mechanism 30 is used to control the upper crossbeam 40 to move upward. Through the connection between the upper crossbeam 40 and the curtain panel 20, it provides a vertical upward force for the unfolding of the curtain panel 20. The other end is connected to the base 10, which facilitates the retraction of the curtain panel 20 into the base 10. One end of the pull cord 50 is connected to the second winding mechanism 102, and the other end is connected to the upper crossbeam 40. The second winding mechanism 102 provides the pull cord 50 to tighten the upper crossbeam 40, thereby transmitting the force to the screen 20 and the lifting mechanism 30. The pull cord 50 is located on the back side of the screen 20 (the side not used for imaging display), and the lifting mechanism 30 is located between the screen 20 and the pull cord 50, so that the force of the pull cord 50 is deflected backward and obliquely downward from the vertical direction. The backward component of this force in the horizontal direction is related to the force provided by the first winding mechanism 101 to wind up the screen 20 (e.g., ...). Figure 1 As shown in Figure a), the forward components in the horizontal direction cancel each other out, thus solving the problem of the ground-lift projection screen tilting forward and obtaining a flat ground-lift projection screen.

[0040] To further explain, when the first winding mechanism 101 winds up the screen 20, the second winding mechanism 102 also winds up the pull rope 50; when the first winding mechanism 101 unwinds the screen 20, the second winding mechanism 102 also unwinds the pull rope 50.

[0041] To further explain, after the first winding mechanism 101 and the second winding mechanism 102 unwind the screen 20 to a suitable viewing size, they can maintain a certain tension to further tighten the screen 20, thereby maintaining the flatness of the screen 20.

[0042] Figure 3 This is a schematic diagram of another ground-mounted projection screen according to Embodiment 1 of this application. A magnetic adhesive layer 60 is attached to the back of the screen panel 20, and the pull rope 50 is a ferromagnetic rope that is magnetically attracted to the magnetic adhesive layer 60.

[0043] To further explain, the magnetic adhesive layer 60 is made of raw rubber, magnetic powder (magnetic filler) and other additives. The pull cord 50 can be a pure iron cord or an alloy cord with added magnetic materials such as iron, cobalt, and nickel. The magnetic adhesive layer on the back of the curtain 20 and the ferromagnetic pull cord 50 have magnetic attraction properties, which further prevents the curtain 20 from tilting forward through mutual attraction.

[0044] Figure 4As shown in the schematic diagram of the pull rope distribution in Embodiment 1 of this application, there are at least two pull ropes 50, and the spacing L between adjacent pull ropes 50 is equal.

[0045] To further explain, the pull cord 50 can be two or more, preferably with the spacing L between adjacent pull cords 50 being equal. This provides a uniform backward force to the screen 20, preventing the screen 220 from tilting while avoiding distortion of the screen 20 surface.

[0046] Figure 5 This is a schematic diagram of the lifting mechanism according to Embodiment 1 of this application. Figure 5 As shown in Figure a, the lifting mechanism 30 is a boom lifting mechanism; as Figure 5 As shown in Figure b, the lifting mechanism 30 is a hydraulic telescopic rod mechanism.

[0047] To further explain, the lifting mechanism 30 can provide a stable force to the screen 20 through the articulated boom lifting mechanism or the hydraulic telescopic rod mechanism, and can also be retracted into the base 10.

[0048] In this embodiment, the main function of the lifting mechanism 30 is to unfold the screen 20 and support the surface of the screen 20 to stand upright.

[0049] The lifting mechanism 30 can also be formed by combining parts such as a curved arm and a telescopic rod, presenting an overall V-shape.

[0050] Figure 6 This is a schematic diagram of the winding mechanism inside the base according to Embodiment 1 of this application. The first winding mechanism 101 includes a first motor 1011 and a first winding rod 1012. The first motor 1011 is connected to the first winding rod 1012 and drives the first winding rod 1012 to rotate. The second winding mechanism 102 includes a second motor 1021 and a second winding rod 1022. The second motor 1021 is connected to the second winding rod 1022 and drives the second winding rod 1022 to rotate.

[0051] To further explain, the first winding mechanism 101 and the second winding mechanism 102 use different motor drives, which can respectively adjust the force exerted by the first winding mechanism 101 on the surface of the curtain 20 and the force exerted by the second winding mechanism 102 on the pull rope 50, thereby optimizing the interaction of forces and better solving the problem of the tilt of the curtain 20 surface.

[0052] To further explain, the first motor 1011 and the first take-up rod 1012 can be connected by a first coupling or directly by nested gears; the second motor 1021 and the second take-up rod 1022 can be connected by a second coupling or directly by nested gears.

[0053] To further explain, the second winding rod 1022 in the second winding mechanism 101 can also be replaced with a winch or a reel, and the winch or reel can be used to wind and unwind the rope 50.

[0054] Furthermore, the curtain panel 20 is connected to the first winding rod 1012, and the connection between the curtain panel 20, the first winding rod 1012, and the upper crossbeam 40 is by adhesive bonding or snap-fitting.

[0055] To further explain, the curtain panel 20 can be glued to the first winding rod 1012 to form a stable structure, or it can be snapped onto the first winding rod 1012 to form a stable structure. The snap-fit ​​method involves cutting a groove in the first winding rod 1012 and using snaps to press the curtain panel 20 tightly into the groove for connection.

[0056] Furthermore, one end of the pull rope 50 is connected to the second winding rod 1022, and the pull rope 50 is connected to the second winding rod 1022 and the upper crossbeam 40 by adhesive or snap-fit.

[0057] To further explain, the pull rope 50 and the second winding rod 1022 can form a stable structure by adhesive bonding or by snap-fit ​​connection, which is the same as described above.

[0058] In this embodiment, the first winding rod 1012 can use different involute structures to improve the height difference at the connection between the first winding rod and the curtain panel 20. The height of the involute can be changed according to the actual situation. The upper crossbeam 40 has a decorative function, and its shape is not unique; the cross-section can be trapezoidal, rectangular, or circular. The upper crossbeam 40 can be made of metal materials such as iron or stainless steel. The end caps of the upper crossbeam 40 can be equipped with small steps to limit the movement of the retracted curtain and cover gaps.

[0059] Furthermore, the screen 20 can be a white plastic screen, a metal screen, a glass bead screen, a Fresnel screen, a linear grating screen, or a light-up subtitle screen.

[0060] To further explain, the screen 20 can be a common screen such as a white plastic screen, a metallic screen, or a beaded screen, or an optical screen such as a Fresnel screen, a line grating screen, or a photonic screen. Whether it is a common screen or an optical screen, it can be used to image the light emitted by the projector. The screen 20 can be a single functional structure layer or multiple functional structure layers.

[0061] In this embodiment, the floor-mounted projection screen 1 may further include a protective layer, which is disposed on the back side of the screen sheet 20. With this configuration, the protective layer acts as a protective layer during the lifting and rewinding process of the floor-mounted projection screen 1. It prevents direct pressure on the imaging display surface of the screen sheet 20 during rewinding, primarily serving to protect the imaging display surface.

[0062] In this embodiment, the ground-mounted projection screen 1 may also include a substrate layer disposed on one side of the back of the screen 20. The substrate layer can promote a flatter screen 20 after it is unfolded, further ensuring the flatness of the imaging display surface of the screen 20.

[0063] In this embodiment, the protective layer and the substrate layer may coexist or one of them may be selected.

[0064] Example 2

[0065] Figure 7 This is a schematic diagram of a floor-mounted projection screen according to Embodiment 2 of this application. The difference from Embodiment 1 is that the floor-mounted projection screen 1 further includes a first connecting section 201 and a second connecting section 202; one side of the first connecting section 201 is connected to the upper crossbeam 40, and the other side is connected to the screen panel 20; one side of the second connecting section 202 is connected to the first retracting rod 1012, and the other side is connected to the screen panel 20.

[0066] To further explain, the first connecting section 201 is mainly used to connect the screen 20 and the upper crossbeam 40, while the second connecting section 202 is mainly used to connect the screen 20 and the first retractable rod 1012. Simultaneously, the arrangement of the first connecting section 201 and the second connecting section 202 makes the floor-mounted projection screen 1 more aesthetically pleasing. During retraction, it also avoids direct contact between the imaging display surface of the screen 20 and the upper crossbeam 40 and the first retractable rod 1012, reducing the possibility of abrasion and scratches on the screen 20 and further protecting its imaging display surface.

[0067] Preferably, the first connecting segment 201 and the second connecting segment 202 are connected to the curtain panel 20 by adhesive bonding or sewing; the first connecting segment 201 is connected to the upper crossbeam 40 by adhesive bonding or snap-fitting; the second connecting segment 202 is connected to the first retracting rod 1012 by adhesive bonding or snap-fitting. The sewing is done by stitching; the snap-fitting is the same as in Embodiment 1.

[0068] To further explain, the first connecting section 201 and the second connecting section 202 are made of flexible fiber materials, which can form a stable structure with the curtain sheet 20 by adhesive bonding or by sewing; the upper crossbeam 40 is made of metal material, and the first connecting section 201 can form a stable structure with it by adhesive bonding or by snap-fit ​​connection; the second connecting section 202 can form a stable structure with the second winding rod 1022 by adhesive bonding or by snap-fit ​​connection.

[0069] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A tilt-resistant, floor-mounted projection screen, characterized in that, include: The system comprises a base, a curtain panel, a lifting mechanism, an upper crossbeam, and several pull ropes. A first winding mechanism and a second winding mechanism are mounted on the base. The first winding mechanism is connected to one side of the curtain panel, and the other side of the curtain panel is connected to the upper crossbeam. One end of the lifting mechanism is connected to the upper crossbeam, and the other end is connected to the base. One end of each pull rope is connected to the second winding mechanism, and the other end is connected to the upper crossbeam. The lifting mechanism and the pull ropes are located on the back side of the curtain panel, with the lifting mechanism positioned between the curtain panel and the pull ropes.

2. The floor-mounted projection screen according to claim 1, characterized in that, A magnetic adhesive layer is attached to the back of the screen, and the pull cord is a ferromagnetic rope that is magnetically attracted to the magnetic adhesive layer.

3. The floor-mounted projection screen according to claim 1, characterized in that, There are at least two pull ropes, and the spacing between adjacent pull ropes is equal.

4. The floor-mounted projection screen according to claim 1, characterized in that, The lifting mechanism is either a boom lifting mechanism or a hydraulic telescopic rod mechanism.

5. The floor-mounted projection screen according to claim 1, characterized in that, The first winding mechanism includes a first motor and a first winding rod. The first motor is connected to the first winding rod and drives the first winding rod to rotate. The second winding mechanism includes a second motor and a second winding rod. The second motor is connected to the second winding rod and drives the second winding rod to rotate.

6. The floor-mounted projection screen according to claim 5, characterized in that, The curtain panel is connected to the first winding rod, and the curtain panel is connected to the first winding rod and the upper crossbeam by adhesive or snap-fit.

7. The floor-mounted projection screen according to claim 5, characterized in that, One end of the pull rope is connected to the second winding rod, and the pull rope is connected to the second winding rod and the upper crossbeam by adhesive or snap-fit.

8. The floor-mounted projection screen according to claim 5, characterized in that, It also includes a first connecting segment and a second connecting segment; One side of the first connecting section is connected to the upper crossbeam, and the other side is connected to the curtain panel; One side of the second connecting section is connected to the first winding rod, and the other side is connected to the curtain sheet.

9. The floor-mounted projection screen according to claim 8, characterized in that, The first connecting segment and the second connecting segment are connected to the curtain sheet by adhesive bonding or sewing; the first connecting segment is connected to the upper crossbeam by adhesive bonding or snap-fitting; the second connecting segment is connected to the first winding rod by adhesive bonding or snap-fitting.

10. The floor-mounted projection screen according to claim 1, characterized in that, The screen can be a white plastic screen, a metal screen, a glass bead screen, a Fresnel screen, a linear grating screen, or an optical subtitle screen.

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