Folding screen device capable of ensuring plane effect through positioning

Abstract

The utility model relates to the field of projection equipment, in particular to a folding screen device capable of ensuring a plane effect by positioning, which is characterized by comprising a first projection screen and a second projection screen, the front wall of the first projection screen and the front wall of the second projection screen can be located in the same plane along with unfolding of the first projection screen and the second projection screen, a positioning protruding strip is arranged on the side wall of the first projection screen, and a positioning clamping groove matched with the positioning protruding strip is formed in the side wall of the second projection screen; when the front wall of the first projection screen and the front wall of the second projection screen are located in the same plane, the positioning clamping grooves can be clamped on the positioning protruding strips. According to the utility model, deviation of the unfolded folding screen can be avoided, adjacent projection screens can be limited together more accurately and stably, high coordination of projected pictures can be ensured for a long time, a good plane effect can be maintained for a long time, and the projection quality can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of projection equipment, in particular to a folding screen device. Background Art

[0002] Currently, projection devices with folding screens have emerged to facilitate storage. Existing projection devices with folding screens utilize hinges to connect at least two projection screens. While this approach can meet folding requirements, the hinges inevitably introduce errors in their installation and positioning. Furthermore, hinges are prone to deformation during use, leading to deviations between the front walls of adjacent projection screens. This can lead to inconsistent projection images, significantly impacting the quality of such projection devices. Therefore, it is crucial to design a folding screen device that can maintain a flat surface while positioning to address these technical issues. Utility Model Content

[0003] The purpose of the present utility model is to solve the above-mentioned problems and shortcomings, and to provide a folding screen device with positioning that can ensure a flat effect. The folding screen device can not only avoid deviation of the folding screen after unfolding, but also can more accurately and stably define adjacent projection screens together, which can ensure that the projected image maintains high coordination for a long time, and can maintain a good flat effect for a long time, thereby greatly improving the quality of the projection.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A folding screen device that can be positioned to ensure a flat effect is characterized in that it includes a first projection screen and a second projection screen, wherein the first projection screen and the second projection screen can be foldably hinged together, and the front walls of the first projection screen and the second projection screen can be in the same plane as they are unfolded, the side walls of the first projection screen are provided with positioning ridges, and the side walls of the second projection screen are provided with positioning slots that match the positioning ridges; when the front walls of the first projection screen and the second projection screen are in the same plane, the positioning slots can be snapped onto the positioning ridges.

[0006] Preferably, the positioning ridges extend along the length direction of the side wall of the first projection screen.

[0007] Preferably, the radial cross-section of the positioning ridge is trapezoidal with a smaller outer end and a larger inner end.

[0008] Preferably, there are two second projection screens, which are respectively arranged on the left and right sides of the first projection screen. The left and right second projection screens are respectively hinged to the left and right side walls of the first projection screen through hinges, and both second projection screens can be flipped and folded horizontally.

[0009] Preferably, a folding drive mechanism is provided on the first projection screen, and the second projection screen is connected to a drive end of the folding drive mechanism, so that the folding drive mechanism can drive the second projection screen to fold and unfold.

[0010] Preferably, the folding drive mechanism includes a drive motor, a drive swing arm, and a drive shaft. The drive motor is arranged on the first projection screen, one end of the drive swing arm is drive-connected to the drive motor, and the other end of the drive swing arm is provided with a horizontally extending strip guide groove. The drive shaft is vertically arranged at the bottom of the second projection screen, and the drive shaft is slidably inserted into the strip guide groove.

[0011] Preferably, the driving swing arm is connected to the power output end of the driving motor through a reduction gearbox.

[0012] Preferably, the reducer is a dual-output head reducer, the two output shafts of the reducer are respectively located at the two ends of the reducer, and the driving swing arm is mounted on one of the output shafts; the other output shaft is mounted with a light detection blocking plate, and the reducer is provided with two photoelectric switches for respectively positioning the folded position and the unfolded position of the second projection screen, and the detection ends of the two photoelectric switches are covered on the light detection blocking plate, and the light detection blocking plate is respectively provided with light holes corresponding to the detection ends of the two photoelectric switches.

[0013] Preferably, a clamping notch is provided on the end of the driving swing arm, and the clamping notch is clamped on the power output shaft of the reduction gearbox.

[0014] Preferably, a positioning convex portion is provided on the outer circumference of the optical inspection blocking piece, and the reduction box is provided with two limiting convex blocks for blocking the positioning convex portion, and the two limiting convex blocks are respectively located on both sides of the optical inspection blocking piece.

[0015] The beneficial effects of this utility model are as follows: In this folding screen device, positioning ridges are provided on the side walls of the first projection screen, and positioning slots are provided on the side walls of the second projection screen to match the positioning ridges. When the front walls of the first and second projection screens are in the same plane, the positioning slots can be snapped onto the positioning ridges. The cooperation between the positioning slots and the positioning ridges not only prevents deviation of the folding screen after unfolding, but also more accurately and stably defines the first and second projection screens, thereby ensuring that the projected image maintains high coordination and a good planar effect over a long period of time, thereby greatly improving the quality of projection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the folding screen device in the present invention in the unfolded state.

[0017] Figure 2This is a structural schematic diagram of the folding screen device in the folded state in the present invention.

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure of part A.

[0019] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of part B.

[0020] Figure 5 This is one of the partial structural diagrams of the folding drive mechanism in the present utility model.

[0021] Figure 6 This is the second partial structural diagram of the folding drive mechanism in the present utility model.

[0022] Figure 7 It is a structural schematic diagram of the light detection blocking sheet in the utility model. DETAILED DESCRIPTION

[0023] like Figures 1 to 3 As shown, the utility model describes a folding screen device whose positioning can ensure a flat effect, comprising a first projection screen 1 and a second projection screen 2, wherein the first projection screen 1 and the second projection screen 2 can be foldably hinged together, and the front walls of the first projection screen 1 and the second projection screen 2 can be in the same plane as they are unfolded, a positioning ridge 11 is provided on the side wall of the first projection screen 1, and a positioning slot 21 matching the positioning ridge 11 is provided on the side wall of the second projection screen 2; when the front walls of the first projection screen 1 and the second projection screen 2 are in the same plane, the positioning slot 21 can be snapped onto the positioning ridge 11.

[0024] In this folding screen device, positioning ridges 11 are provided on the side walls of the first projection screen 1, and positioning slots 21 are provided on the side walls of the second projection screen 2 to match the positioning ridges 11. When the front walls of the first and second projection screens 1 and 2 are in the same plane, the positioning slots 21 can be snapped onto the positioning ridges 11. The cooperation between the positioning slots 21 and the positioning ridges 11 not only prevents deviation of the folding screen after unfolding, but also more accurately and stably defines the first and second projection screens 1 and 2. This ensures that the projected image maintains high coordination and a good planar effect over a long period of time, thereby greatly improving the quality of projection.

[0025] In the actual manufacturing process, either the first projection screen 1 or the second projection screen 2 can be used as the main screen. Alternatively, either the first projection screen 1 or the second projection screen 2 can be used as a fixed projection screen, while the other projection screen can be swung relative to the first projection screen 1, thereby also meeting the folding requirement.

[0026] like Figures 2 to 4 As shown, the positioning ridges 11 are integrally formed with the profile frame on the first projection screen 1, and the positioning slots 21 are integrally formed with the profile frame on the second projection screen 2. This not only improves manufacturing efficiency but also further enhances positioning strength.

[0027] like Figures 2 to 4 As shown, the positioning ridges 11 extend along the length direction of the side wall of the first projection screen 1. This can facilitate a more comprehensive and effective positioning effect, thereby helping to further improve the accuracy and stability of the deployment positioning.

[0028] like Figure 3 As shown, the radial cross-section of the positioning ridge 11 is a trapezoid with a smaller outer end and a larger inner end. This not only makes the positioning ridge 11 more convenient to fit with the positioning slot 21, but also achieves a more accurate positioning effect, thereby helping to further improve the reliability and applicability of the folding screen device.

[0029] like Figure 2 As shown, there are two second projection screens 2, one on the left and one on the right of the first projection screen 1. The two second projection screens 2 are hingedly connected to the left and right side walls of the first projection screen 1 via hinges 3, respectively, allowing both second projection screens 2 to be flipped and folded horizontally. This not only allows the folding projection screen device to have a wide screen, but also ensures a small width after folding, thereby further improving the applicability of the folding screen device.

[0030] like Figure 2 As shown, the hinge 3 is a three-dimensional invisible hinge, with its ends respectively embedded in the side walls of the first projection screen 1 and the second projection screen 2. This not only meets the requirement for a foldable hinge, but also facilitates direct contact between the side walls of the first projection screen 1 and the second projection screen 2, thereby further improving the projection quality of the folding screen device.

[0031] like Figure 1 and Figure 2 As shown, the first projection screen 1 is provided with a folding drive mechanism 4, and the second projection screen 2 is connected to the driving end of the folding drive mechanism 4, so that the folding drive mechanism 4 can drive the second projection screen 2 to fold and unfold. This facilitates the realization of an automatic control effect, thereby helping to improve the convenience of use.

[0032] like Figures 4 to 6As shown, the folding drive mechanism 4 includes a drive motor 41, a drive swing arm 42, and a drive shaft 43. The drive motor 41 is mounted on the first projection screen 1. One end of the drive swing arm 42 is drivingly connected to the drive motor 41, enabling the drive motor 41 to drive the drive swing arm 42 to rotate horizontally. The other end of the drive swing arm 42 defines a horizontally extending strip guide groove 421. The axial center of the strip guide groove 421 passes through the rotational centerline of the drive swing arm 42 and is perpendicular to the rotational centerline of the drive swing arm 42. The drive shaft 43 is vertically mounted at the bottom of the second projection screen 2 and is slidably inserted into the strip guide groove 421. This folding drive mechanism 4 not only has a relatively simple structure but also enables the folding drive mechanism 4 to accurately and stably drive the second projection screen 2, thereby further improving the reliability and applicability of the folding screen device.

[0033] like Figures 4 to 6 As shown, the driving swing arm 42 is connected to the power output end of the driving motor 41 through a reduction box 44. This can make the power transmission more stable and reliable, thereby helping to further improve the reliability and applicability of the folding screen device.

[0034] like Figures 5 to 7 As shown, the reduction gearbox 44 is a dual-output reduction gearbox, with two output shafts 441 located at either end of the reduction gearbox 44. The driving swing arm 42 is mounted on one of the output shafts 441; a light detection barrier 45 is mounted on the other output shaft 441. The reduction gearbox 44 is equipped with two photoelectric switches 46 for respectively determining the folded and unfolded positions of the second projection screen 2. The detection ends of the two photoelectric switches 46 are covered by the light detection barrier 45. The light detection barrier 45 is provided with light holes 451 corresponding to the detection ends of the two photoelectric switches 46. This not only facilitates assembly but also facilitates accurate and stable positioning, thereby further improving the reliability and applicability of the folding screen device.

[0035] like Figure 6 As shown, a clamping notch 422 is provided on the end of the driving swing arm 42, and the clamping notch 422 is clamped on the power output shaft of the reduction box 44. This can help improve the convenience of installing and positioning the driving swing arm 42.

[0036] like Figure 6 As shown, in the actual manufacturing process, a screw or bolt (not shown in the figure) that passes through the end of the clamping notch 422 can be used to achieve the purpose of locking, so that the clamping notch 422 can be clamped more tightly on the power output shaft of the reduction gearbox 44, thereby further improving the stability and reliability of the installation and positioning of the drive swing arm 42.

[0037] like Figures 5 to 7 As shown, a positioning protrusion 452 is provided on the outer circumference of the light detection blocking piece 45, and two limiting protrusions 442 are provided on the reduction gear box 44 for blocking the positioning protrusion 452. The two limiting protrusions 442 are respectively located on both sides of the light detection blocking piece 45. This can achieve a more accurate and stable positioning effect, thereby helping to further improve the accuracy of the folding and unfolding of the second projection screen 2.

[0038] like Figure 5 As shown, the two limiting protrusions 442 can be set on the same positioning piece 443, and the two limiting protrusions 442 can be connected to the outer shell of the reduction gear box 44 through the positioning piece 443. The light detection blocking piece 45 is restricted by the positioning protrusion 452 and the two limiting protrusions 442, so that the light detection blocking piece 45 can only rotate 180 degrees, thereby playing a very accurate positioning role for the second projection screen 2 that is flipped 180 degrees.

[0039] like Figures 4 to 6 As shown, the reduction box 44 is fixed to the first projection screen 1 by an angle iron 47, and the drive motor 41 is fixed to the housing of the reduction box 44. This not only facilitates installation and positioning, but also helps to achieve accurate and stable positioning.

[0040] like Figure 1 、 Figure 2 、 Figures 4 to 7 As shown, the two light holes 451 are located at different distances from the rotational centerline of the light detection blocking plate 45. These two light holes 451 alternately enter the detection ends of the two photoelectric switches 46. The second projection screen 2 can be flipped horizontally 180 degrees. The drive motor 41 and the two photoelectric switches 46 are coordinated and controlled by a master control circuit module (not shown). When the second projection screen 2 is flipped to the unfolded position, one of the light holes 451 is positioned within the detection end of the corresponding photoelectric switch 46, and the master control circuit module stops the drive motor 41. At this point, the positioning protrusion 452 abuts one of the stop protrusions 442. When the second projection screen 2 is flipped to the folded position, the other light hole 451 is positioned within the detection end of the corresponding photoelectric switch 46. The master control circuit module stops the drive motor 41, and the positioning protrusion 452 abuts the other stop protrusion 442. This ensures accurate and stable positioning of the second projection screen 2, meeting practical requirements.

[0041] The above embodiments are preferred embodiments of the present invention. All structures similar to those of the present invention and equivalent changes made thereto should fall within the scope of protection of the present invention.

Claims

1. A folding screen device capable of ensuring a flat surface, characterized in that: The invention comprises a first projection screen (1) and a second projection screen (2), wherein the first projection screen (1) and the second projection screen (2) are foldably hinged together, and the front walls of the first projection screen (1) and the second projection screen (2) can be located in the same plane as they are unfolded; a positioning ridge (11) is provided on the side wall of the first projection screen (1), and a positioning slot (21) matching the positioning ridge (11) is provided on the side wall of the second projection screen (2); when the front walls of the first projection screen (1) and the second projection screen (2) are located in the same plane, the positioning slot (21) can be clamped on the positioning ridge (11).

2. The folding screen device capable of ensuring a flat surface according to claim 1, characterized in that: The positioning ridges (11) extend along the length direction of the side wall of the first projection screen (1).

3. The folding screen device capable of ensuring a flat surface according to claim 1 or 2, characterized in that: The radial cross section of the positioning convex strip (11) is trapezoidal in shape with a small outer end and a large inner end.

4. The folding screen device capable of ensuring a flat surface according to claim 1, characterized in that: There are two second projection screens (2), which are respectively arranged on the left and right sides of the first projection screen (1). The left and right second projection screens (2) are respectively hinged to the left and right side walls of the first projection screen (1) via hinges (3), and both second projection screens (2) can be flipped and folded horizontally.

5. The folding screen device capable of ensuring a flat surface according to claim 1 or 4, characterized in that: The first projection screen (1) is provided with a folding drive mechanism (4), the second projection screen (2) is connected to the drive end of the folding drive mechanism (4), and the folding drive mechanism (4) can drive the second projection screen (2) to fold and unfold.

6. The folding screen device capable of ensuring a flat surface according to claim 5, characterized in that: The folding drive mechanism (4) comprises a drive motor (41), a drive swing arm (42), and a drive shaft (43); the drive motor (41) is arranged on the first projection screen (1); one end of the drive swing arm (42) is drive-connected to the drive motor (41); the other end of the drive swing arm (42) is provided with a horizontally extending strip guide groove (421); the drive shaft (43) is vertically arranged at the bottom of the second projection screen (2), and the drive shaft (43) is slidably inserted into the strip guide groove (421).

7. The folding screen device capable of ensuring a flat surface according to claim 6, characterized in that: The driving swing arm (42) is connected to the power output end of the driving motor (41) through a reduction box (44).

8. The folding screen device capable of ensuring a flat surface according to claim 7, characterized in that: The reduction box (44) is a dual-output reduction box. The two output shafts (441) of the reduction box (44) are respectively located at the two ends of the reduction box (44). The driving swing arm (42) is mounted on one of the output shafts (441); the other output shaft (441) is mounted with a light detection blocking plate (45). The reduction box (44) is provided with two photoelectric switches (46) for respectively positioning the folding position and the unfolding position of the second projection screen (2). The detection ends of the two photoelectric switches (46) are both covered on the light detection blocking plate (45). The light detection blocking plate (45) is respectively provided with light holes (451) corresponding to the detection ends of the two photoelectric switches (46).

9. The folding screen device capable of ensuring a flat surface according to claim 7, characterized in that: A clamping notch (422) is provided on the end of the driving swing arm (42), and the clamping notch (422) is clamped on the power output shaft of the reduction box (44).

10. The folding screen device capable of ensuring a flat surface by positioning according to claim 8, characterized in that: A positioning convex portion (452) is provided on the outer circumference of the optical detection blocking piece (45), and two limiting convex blocks (442) for blocking the positioning convex portion (452) are provided on the reduction box (44), and the two limiting convex blocks (442) are respectively located on both sides of the optical detection blocking piece (45).

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