A projection screen device

Abstract

The utility model relates to a projection equipment technical field, especially a kind of projection screen device, it includes chassis, projection screen main body, is used to be rolled up to the curtain drive mechanism of projection screen main body and is used to drive the lifting drive mechanism of projection screen main body lifting;The upper end surface of chassis is respectively provided with stand, and projection screen main body is located between two stands;Lifting drive mechanism includes steel wire rope and two respectively arranged on two lifting assemblies of stand, two lifting assemblies are respectively located in the two sides of projection screen main body, and the two ends of steel wire rope are respectively connected with two lifting assemblies, and the upper end of projection screen main body is connected with steel wire rope.The utility model structure is novel, can realize the quick storage and unfolding of projection screen main body, so that projection screen main body does not need the traditional projection screen guide support to guide lifting to projection screen main body, avoid the traditional projection screen guide support to influence traditional show effect.

Description

Technical Field

[0001] This utility model relates to the field of projection equipment technology, and in particular to a projection screen device. Background Technology

[0002] In settings such as stages and conference rooms, traditional projection screen devices typically use guide brackets (such as sliding rails or fixed frames) to support and guide the raising and lowering of the projection screen. This structure has the following problems: the guide bracket still occupies stage space when not in use, which may obstruct actors or affect the stage layout, especially in performance scenarios, thus damaging the visual effect; the storage of the projection screen depends on the physical structure of the bracket, and the process of unfolding and retracting is time-consuming, making it difficult to meet the needs of rapid switching; in addition, the projection screen bracket structure may increase the weight of the device and the difficulty of installation, and long-term use can easily lead to wear and tear, resulting in uneven raising and lowering. Summary of the Invention

[0003] This utility model addresses the problems of existing technologies by providing a projection screen device with a novel structure. It enables the rapid storage and unfolding of the projection screen body. During storage, the projection screen body is stored on the base frame, and the steel cable descends synchronously. This eliminates the need for traditional projection screen guide brackets to guide and raise the projection screen body, thus avoiding the obstruction of the stage by traditional projection screen guide brackets when the projection screen body is not in use and preventing the traditional projection screen guide brackets from affecting the performance effect.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides a projection screen device, which includes a base frame, a projection screen body, a screen retraction drive mechanism for retracting the projection screen body, and a lifting drive mechanism for raising and lowering the projection screen body. The base frame has columns on both sides of its upper surface, and the projection screen body is located between the two columns. The lifting drive mechanism includes a steel wire rope and two lifting components respectively arranged on the two columns. The two lifting components are located on both sides of the projection screen body, and the two ends of the steel wire rope are connected to the two lifting components respectively. The upper end of the projection screen body is connected to the steel wire rope, and the two lifting components are used to drive the two ends of the steel wire rope to move up and down.

[0006] The lifting assembly includes a lifting drive motor, a lifting sprocket, a lifting chain, and a lifting connecting block. The output end of the lifting drive motor is connected to the drive sprocket. The lifting sprocket is rotatably mounted on the upper end of the column. The lifting chain is wound around the lifting sprocket and the drive sprocket. The lifting connecting block is connected to the lifting chain. Both ends of the wire rope are respectively connected to the lifting connecting blocks of the two lifting assemblies.

[0007] The screen retraction drive mechanism includes a screen retraction torque motor and a screen retraction drum. The output end of the screen retraction torque motor is driven and connected to one end of the screen retraction drum. A bearing seat is installed on the base frame at the end away from the screen retraction torque motor. The other end of the screen retraction drum is rotatably connected to the bearing seat. The lower end of the projection screen body is connected to the screen retraction drum.

[0008] The screen retraction drive mechanism further includes a pressure roller assembly, which includes a pressure roller bracket mounted on the base frame and an anti-detachment pressure roller rotatably mounted on the pressure roller bracket. The anti-detachment pressure roller is located on the upper side of the screen retraction drum. When the projection screen body needs to be wound, the projection screen body is wound around the outer periphery of the screen retraction drum, and the anti-detachment pressure roller slides against the projection screen body.

[0009] Among them, multiple roller brackets are installed in a row at equal intervals between the bearing housing and the curtain retraction torque motor. The curtain retraction drum is located above the roller brackets. Pulleys are rotatably installed on the upper ends of both sides of the roller brackets. A flexible support belt is wrapped around the upper outer periphery of the roller brackets and is slidably connected to the pulleys.

[0010] The base frame is equipped with a protective mechanism, which includes an outer frame. The upper end of the outer frame has a slot, and a support frame and a flip-up door panel rotatably mounted on the support frame are installed in the slot.

[0011] The beneficial effects of this utility model are:

[0012] This utility model features a novel structure. During operation, a lifting assembly drives the two ends of a steel wire rope to move up and down synchronously. Since the steel wire rope is connected to the upper end of the projection screen body, the upward movement of the steel wire rope drives the projection screen body upward, thus unfolding the projection screen body. The downward movement of the steel wire rope to the bottom allows the projection screen body to be stored. When storing the projection screen body, the screen retraction drive mechanism rolls it up. With this utility model, the projection screen body can be quickly stored and unfolded. At the same time, when storing, the projection screen body is stored on the base frame, and the steel wire rope descends synchronously. This eliminates the need for a traditional projection screen guide bracket to guide and lift the projection screen body, avoiding the obstruction of the stage by the traditional projection screen guide bracket when the projection screen body is not in use, and preventing the traditional projection screen guide bracket from affecting the performance effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a projection screen device according to the present invention.

[0014] Figure 2 This is a schematic diagram of the protective mechanism, curtain retraction drive mechanism, and lifting drive mechanism of this utility model.

[0015] exist Figures 1 to 2 The reference numerals in the figures include:

[0016] 1. Base frame; 2. Projection screen body; 3. Screen retraction drive mechanism; 4. Lifting drive mechanism; 5. Column; 6. Steel wire rope; 7. Lifting assembly; 8. Lifting drive motor; 9. Lifting sprocket; 10. Lifting chain; 11. Lifting connecting block; 12. Drive sprocket; 13. Screen retraction torque motor; 14. Screen retraction drum; 15. Bearing seat; 16. Pressure roller assembly; 17. Pressure roller bracket; 18. Anti-detachment pressure roller; 19. Roller bracket; 20. Pulley; 21. Flexible support belt; 22. Protective mechanism; 23. Outer frame; 24. Slot; 25. Support frame; 26. Flip-up door panel. Detailed Implementation

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0018] A projection screen device, such as Figures 1 to 2 As shown, it includes a base frame 1, a projection screen body 2, a screen retraction drive mechanism 3 for retracting the projection screen body 2, and a lifting drive mechanism 4 for raising and lowering the projection screen body 2; the base frame 1 has columns 5 on both sides of its upper end face, and the projection screen body 2 is located between the two columns 5; the lifting drive mechanism 4 includes a steel wire rope 6 and two lifting components 7 respectively arranged on the two columns 5, the two lifting components 7 are respectively located on both sides of the projection screen body 2, the two ends of the steel wire rope 6 are respectively connected to the two lifting components 7, the upper end of the projection screen body 2 is connected to the steel wire rope 6, and the two lifting components 7 are respectively used to drive the two ends of the steel wire rope 6 to move up and down. Specifically, this utility model has a novel structure. During operation, the lifting assembly 7 drives the two ends of the steel wire rope 6 to move up and down synchronously. Since the steel wire rope 6 is connected to the upper end of the projection screen body 2, the upward movement of the steel wire rope 6 drives the projection screen body 2 to move upward, thereby unfolding the projection screen body 2. The downward movement of the steel wire rope 6 to the bottom enables the projection screen body 2 to be stored. When storing the projection screen body 2, the screen retraction drive mechanism 3 rewinds the projection screen body 2. With the setting of this utility model, the projection screen body 2 can be quickly stored and unfolded. At the same time, when storing, the projection screen body 2 is stored on the base frame 1, and the steel wire rope 6 descends synchronously. This eliminates the need for a traditional projection screen guide bracket to guide and lift the projection screen body 2, avoiding the obstruction of the stage by the traditional projection screen guide bracket when the projection screen body 2 is not in use, and preventing the traditional projection screen guide bracket from affecting the traditional performance effect.

[0019] In this embodiment, the lifting assembly 7 includes a lifting drive motor 8, a lifting sprocket 9, a lifting chain 10, and a lifting connecting block 11. The output end of the lifting drive motor 8 is connected to a drive sprocket 12. The lifting sprocket 9 is rotatably mounted on the upper end of the column 5. The lifting chain 10 is wound around the lifting sprocket 9 and the drive sprocket 12. The lifting connecting block 11 is connected to the lifting chain 10. Both ends of the steel wire rope 6 are respectively connected to the lifting connecting blocks 11 of the two lifting assemblies 7. The screen retraction drive mechanism 3 includes a screen retraction torque motor 13 and a screen retraction drum 14. The output end of the screen retraction torque motor 13 is drivenly connected to one end of the screen retraction drum 14. A bearing seat 15 is mounted on the base frame 1 at the end away from the screen retraction torque motor 13. The other end of the screen retraction drum 14 is rotatably connected to the bearing seat 15. The lower end of the projection screen body 2 is connected to the screen retraction drum 14. Specifically, when the lifting assembly 7 is working, the lifting drive motor 8 drives the lifting sprocket 9 to rotate, thereby moving the lifting chain 10, which in turn moves the lifting connecting block 11 up and down, and in turn drives the steel wire rope 6 to move up and down synchronously. In addition, when the projection screen body 2 is rolled up, the screen winding torque motor 13 drives the screen winding drum 14 to rotate, thereby driving the projection screen body 2 to be rolled up on the screen winding drum 14. Under the above configuration, the lifting of the projection screen body 2 is driven by the lifting of the steel wire rope 6, which avoids the problem that the lifting mechanism of the traditional projection screen body 2 is prone to wear and tear after long-term use, resulting in uneven lifting.

[0020] In this embodiment, the screen retraction drive mechanism 3 further includes a pressure roller assembly 16. The pressure roller assembly 16 includes a pressure roller bracket 17 mounted on the base frame 1 and an anti-detachment pressure roller 18 rotatably mounted on the pressure roller bracket 17. The anti-detachment pressure roller 18 is located on the upper side of the screen retraction drum 14. When the projection screen body 2 needs to be wound, the projection screen body 2 is wound around the outer periphery of the screen retraction drum 14, and the anti-detachment pressure roller 18 slides against the projection screen body 2. Specifically, under the above configuration, the anti-detachment pressure roller 18 is rotatably mounted and can slide against the projection screen body 2 to prevent the projection screen body 2 wound on the screen retraction drum 14 from becoming loose, thus ensuring stability and reliability when storing the projection screen body 2.

[0021] In this embodiment, a plurality of roller brackets 19 are installed in a row at equal intervals between the bearing housing 15 and the retracting torque motor 13. The retracting roller 14 is located above the roller brackets 19. Pulleys 20 are rotatably mounted on the upper ends of both sides of the roller brackets 19. A flexible support belt 21 is wrapped around the outer periphery of the upper end of the roller bracket 19 and slidably connected to the pulleys 20. Specifically, with the above arrangement, when the projection screen body 2 is being stored by the retracting roller 14, the flexible support belt 21 can support the retracted projection screen body 2, further preventing the projection screen body 2 from becoming loose.

[0022] In this embodiment, a protective mechanism 22 is installed on the base frame 1. The protective mechanism 22 includes an outer frame 23, with a slot 24 at the upper end of the outer frame 23. A support frame 25 and a flip-up door panel 26 rotatably mounted on the support frame 25 are installed at the slot 24. Specifically, with the above configuration, the flip-up door panel 26 can rotate, facilitating the opening and closing of the opening. The slot 24 facilitates the operation of the lifting assembly 7 and the projection screen body 2.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A projection screen device, characterized in that: The system includes a base frame, a projection screen body, a screen retraction drive mechanism for retracting the projection screen body, and a lifting drive mechanism for raising and lowering the projection screen body. The base frame has columns on both sides of its upper surface, and the projection screen body is located between the two columns. The lifting drive mechanism includes a steel wire rope and two lifting components respectively arranged on the two columns. The two lifting components are located on both sides of the projection screen body, and the two ends of the steel wire rope are connected to the two lifting components. The upper end of the projection screen body is connected to the steel wire rope, and the two lifting components are used to drive the two ends of the steel wire rope to move up and down.

2. The projection screen device according to claim 1, characterized in that: The lifting assembly includes a lifting drive motor, a lifting sprocket, a lifting chain, and a lifting connecting block. The output end of the lifting drive motor is connected to the drive sprocket. The lifting sprocket is rotatably mounted on the upper end of the column. The lifting chain is wound around the lifting sprocket and the drive sprocket. The lifting connecting block is connected to the lifting chain. The two ends of the wire rope are respectively connected to the lifting connecting blocks of the two lifting assemblies.

3. The projection screen device according to claim 1, characterized in that: The screen retraction drive mechanism includes a screen retraction torque motor and a screen retraction drum. The output end of the screen retraction torque motor is driven and connected to one end of the screen retraction drum. A bearing seat is installed on the base frame at the end away from the screen retraction torque motor. The other end of the screen retraction drum is rotatably connected to the bearing seat. The lower end of the projection screen body is connected to the screen retraction drum.

4. A projection screen device according to claim 3, characterized in that: The screen retraction drive mechanism also includes a pressure roller assembly, which includes a pressure roller bracket mounted on the base frame and an anti-detachment pressure roller rotatably mounted on the pressure roller bracket. The anti-detachment pressure roller is located on the upper side of the screen retraction drum. When the projection screen body needs to be wound, the projection screen body is wound around the outer periphery of the screen retraction drum, and the anti-detachment pressure roller slides against the projection screen body.

5. A projection screen device according to claim 3, characterized in that: Multiple roller brackets are installed in a row at equal intervals between the bearing housing and the curtain retraction torque motor. The curtain retraction drum is located above the roller brackets. Pulleys are rotatably installed on the upper ends of both sides of the roller brackets. A flexible support belt is wrapped around the upper outer periphery of the roller brackets and is slidably connected to the pulleys.

6. A projection screen device according to claim 1, characterized in that: The base frame is equipped with a protective mechanism, which includes an outer frame. The upper end of the outer frame has a slot, and a support frame and a flip-up door panel rotatably mounted on the support frame are installed in the slot.

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