Lifting type projection screen

Abstract

The utility model relates to the technical field of projection screens, in particular to a lifting type projection screen which comprises a shell, a collection box, a winder and a cleaning assembly. The winder is installed at the top end of the inner side of the shell, and a projection screen body extending towards the outer side of the shell is wound on the outer side of the winder; the collecting box is slidably installed at the bottom end of the inner side of the shell, and the side face of the collecting box is provided with an auxiliary roller set used for enabling the projection screen body to be located above the collecting box to horizontally move in the using state. The position of the end of the projection screen body is limited through the cooperation of the limiting roller and the pinch roller, the projection screen body horizontally moves above the collecting box, the cleaning assembly scrapes dust on the surface of the projection screen body towards the inner side of the collecting box, dust pollution caused by direct cleaning is avoided, and meanwhile through the sliding locking block, the dust on the surface of the projection screen body can be effectively removed. And the collection box is dismounted and cleaned, so that the collection box drives the cleaning assembly to repeatedly clean the projection screen body.

Description

Technical Field

[0001] The utility model relates to the technical field of projection screens, in particular to a lifting projection screen. Background Art

[0002] Projection screen is one of the most commonly used products among projector peripheral equipment. Projection screen is the abbreviation of projection screen. If the projection screen is properly matched with the projector, high-quality projection effects can be achieved.

[0003] A Chinese patent document with authorization announcement number CN219349343U discloses an intelligent lifting projection screen. During the rising process of the intelligent lifting projection screen, the staff can start the second motor to rotate. The second motor drives two rotating rods to drive the soft brush to rotate, thereby sweeping away the chalk dust in advance to prevent the chalk dust from entering the inside of the shell.

[0004] But, also have the following disadvantages: brush sweeps off chalk dust and makes chalk dust float in the air, causes dust pollution to surrounding environment. Utility Model Content

[0005] The purpose of the utility model is to provide a lifting projection screen in response to the problems existing in the background technology.

[0006] The technical solution of the utility model is: a lifting projection screen, comprising a shell, a collection box, a winder and a cleaning assembly;

[0007] The winder is installed at the inner top end of the shell, and the outer side of the winder is wound with a projection screen body extending toward the outer side of the shell;

[0008] The collecting box is slidably mounted on the inner bottom end of the shell, and the side of the collecting box is provided with an auxiliary roller group for horizontally moving the projection screen body above the collecting box when in use;

[0009] The cleaning component is installed on the inner side of the collection box and the top end thereof contacts the surface of the projection screen body.

[0010] Preferably, a first cavity and a second cavity are provided on the inner side of the shell, the winder is located in the first cavity, and the collecting box and the auxiliary roller group are located in the second cavity.

[0011] Preferably, the cleaning assembly includes a support rod, a sleeve, a scraper and a torsion spring mounted thereon;

[0012] The support rod is installed on the inner side of the collection box;

[0013] The sleeve is sleeved on the middle part of the support rod;

[0014] The scraper is installed obliquely on the outside of the casing;

[0015] The torsion spring is sleeved on the end of the support rod and connected to the scraper.

[0016] Preferably, baffles are provided on the inner side of the shell and on both sides of the collection box, and the collection box is slidably connected to the baffles.

[0017] Preferably, a locking block extending toward the inner side of the shell is slidably mounted on the end of the collection box, and the end of the locking block contacts the inner wall of the shell.

[0018] Preferably, a counterweight bar is provided at the end of the projection screen body, and a through hole is provided at the bottom end of the shell. When the winder is winding the projection screen body, the counterweight bar is accommodated in the through hole of the shell.

[0019] Preferably, a bump is provided at the bottom of one end of the collecting box, and an anti-slip groove is provided at the bottom end of the bump.

[0020] Preferably, the auxiliary roller group includes a limiting roller and a pinch roller;

[0021] The limiting roller is installed at the bottom end of the inner side of the shell and is located on the upper side of the collecting box;

[0022] The pinch roller is installed on and located at the side of the collecting box, and the height of the pinch roller is greater than the height of the collecting box.

[0023] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects:

[0024] The utility model limits the end position of the projection screen body through the cooperation of the limiting roller and the pinching roller, and moves the projection screen body horizontally above the collection box, so that the cleaning component scrapes the dust on the surface of the projection screen body toward the inside of the collection box, avoiding dust pollution caused by direct cleaning. At the same time, the collection box can be disassembled for cleaning by sliding the locking block, so that the collection box drives the cleaning component to repeat the cleaning work of the projection screen body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1-2 All of them are three-dimensional diagrams of an embodiment proposed by the utility model.

[0026] Figure 3 The figure is a schematic diagram of the inner structure of the shell in an embodiment of the present invention.

[0027] Figure 4 This is a schematic cross-sectional view of the overall structure of an embodiment of the present invention.

[0028] Figure 5 This is an exploded schematic diagram of the connection structure between the shell and the collection box in an embodiment of the present invention.

[0029] Figure 6 This is a schematic structural diagram of a cleaning assembly and a collection box in an embodiment of the present invention.

[0030] Figure numerals: 1. Shell; 2. Collection box; 3. Locking block; 4. Protrusion; 5. Winder; 6. Pinch roller; 7. Projection screen body; 8. Limiting roller; 9. Cleaning assembly; 91. Support rod; 92. Sleeve; 93. Scraper; 94. Torsion spring; 10. Baffle; 11. First cavity; 12. Second cavity; 13. Counterweight bar. DETAILED DESCRIPTION

[0031] Example 1

[0032] like Figure 1-6 As shown, the utility model proposes a lifting projection screen, which includes a shell 1, a collection box 2, a winder 5 and a cleaning assembly 9;

[0033] The winder 5 is installed at the top inner side of the shell 1, and the outer side of the winder 5 is wound with a projection screen body 7 extending to the outside of the shell 1; it should be noted that a counterweight bar 13 is provided at the end of the projection screen body 7, and a through hole is provided at the bottom end of the shell 1. When the winder 5 winds up the projection screen body 7, the counterweight bar 13 is accommodated in the through hole of the shell 1. When the projection screen body 7 moves toward the outside of the shell 1, the projection screen body 7 moves downward steadily and with tension through the cooperation of the counterweight bar 13, thereby improving the use effect of the projection screen body 7. At the same time, after winding, the counterweight bar 13 closes the through hole of the shell 1, thereby improving the aesthetic effect of the shell 1.

[0034] The collecting box 2 is slidably mounted on the inner bottom end of the housing 1. The side of the collecting box 2 is provided with an auxiliary roller group for horizontally moving the projection screen body 7 above the collecting box 2 when in use.

[0035] The cleaning assembly 9 is installed on the inner side of the collection box 2 and the top end is in contact with the surface of the projection screen body 7 .

[0036] In an optional embodiment, baffles 10 are provided on the inner side of the shell 1 and on both sides of the collection box 2. When the collection box 2 is disassembled and assembled, the outer wall of the collection box 2 is slidably connected to the baffle 10 to limit the moving direction of the collection box 2, making the disassembly and assembly of the collection box 2 more convenient.

[0037] In this embodiment, the winder 5 drives the projection screen body 7 to reel up, so that the projection screen body 7 moves toward the winder 5. During the movement, the auxiliary roller group moves part of the projection screen body 7 horizontally above the collecting box 2, so that the surface of the projection screen body 7 is in sliding contact with the cleaning component 9. At the same time, the cleaning component 9 scrapes the powder avoided by the projection screen body 7 to the inside of the collecting box 2, and cleans the powder inside the collecting box 2 by removing the collecting box 2 from the inside of the shell 1, and installing it on the inside of the shell 1, so that the collecting box 2 performs repeated collection work to avoid dust pollution caused by direct cleaning.

[0038] Example 2

[0039] like Figure 5-6 As shown, the utility model proposes a lifting projection screen. Compared with the first embodiment, in this embodiment, the end of the collection box 2 is slidably installed with a locking block 3 extending toward the inner side of the shell 1, and the end of the locking block 3 contacts the inner wall of the shell 1 for sliding the locking block 3 when the collection box 2 is disassembled, so that the locking block 3 is connected or separated from the inner wall of the shell 1, the collection box 2 is fixed on the shell 1, and the collection box 2 is disassembled on the shell 1.

[0040] In an optional embodiment, a protrusion 4 is provided at the bottom of one end of the collection box 2, and an anti-slip groove is provided at the bottom of the protrusion 4. The protrusion 4 and the anti-slip groove at the bottom of the protrusion 4 improve the convenience of disassembling the collection box 2.

[0041] In this embodiment, the sliding lock block 3 separates the lock block 3 from the housing 1, and the collection box 2 is taken out from the inside of the housing 1 through the contact protrusion 4 and the anti-slip groove, making the collection box 2 more convenient to disassemble and assemble.

[0042] Example 3

[0043] like Figure 3-4 As shown, the present invention proposes a lifting projection screen. Compared with the first embodiment, in this embodiment, a first cavity 11 and a second cavity 12 are provided on the inner side of the shell 1, the winder 5 is located in the first cavity 11, the collection box 2 and the auxiliary roller group are located in the second cavity 12, and the first cavity 11 and the second cavity 12 are in a connected state, wherein the projection screen body 7 moves at the connected portion and seals the connected portion to prevent dust from entering the first cavity 11.

[0044] Example 4

[0045] like Figure 6 As shown, the present invention proposes a lifting projection screen. Compared with the first embodiment, in this embodiment, the cleaning assembly 9 includes a support rod 91, a sleeve 92, a scraper 93 and a torsion spring 94;

[0046] The support rod 91 is installed on the inner side of the collection box 2;

[0047] The sleeve 92 is sleeved on the middle part of the support rod 91;

[0048] The scraper 93 is installed obliquely on the outside of the sleeve 92; wherein, the end of the scraper 93 is smooth to prevent the scraper 93 from scratching the projection screen body 7.

[0049] The torsion spring 94 is sleeved on the end of the support rod 91 and connected to the scraper 93 .

[0050] In this embodiment, the movement of the projection screen body 7 in contact with the scraper 93 causes the scraper 93 to drive the sleeve 92 to rotate on the support rod 91, and through the characteristics of the torsion spring 94 itself, the end of the torsion spring 94 that drives the scraper 93 is in close contact with the surface of the projection screen body 7.

[0051] Example 5

[0052] like Figure 3-4 As shown, the lifting projection screen proposed by the present invention, compared with the first embodiment, in this embodiment, the auxiliary roller group includes a limiting roller 8 and a pinch roller 6;

[0053] The limiting roller 8 is installed at the bottom end of the inner side of the shell 1 and is located above the collecting box 2;

[0054] The pinching roller 6 is installed on the side of the collecting box 2 and is located on the side of the collecting box 2. The height of the pinching roller 6 is greater than the height of the collecting box 2. The pinching roller 6 is located directly above the through hole of the shell 1, so that the middle part of the pinching roller 6 is vertical to the through hole of the shell 1.

[0055] In this embodiment, the projection screen body 7 on the winder 5 is limited to the upper side of the collecting box 2 by the limiting roller 8, so that the end of the projection screen body 7 moves from the bottom of the limiting roller 8 to the middle of the pinching roller 6, and the projection screen body 7 moves to the outside of the shell 1 through the middle of the pinching roller 6. In the process of the projection screen body 7 moving toward the pinching roller 6, the projection screen body 7 is horizontally located above the collecting box 2.

[0056] The dust collecting box 2 is then moved to the inner side of the housing 1 by the winder 5, so that the dust collecting box 2 can be moved to the inner side of the housing 1 by the winder 5.

[0057] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A lifting projection screen, characterized in that: It comprises a housing (1), a collecting box (2), a winder (5) and a cleaning assembly (9); The winder (5) is mounted on the inner top end of the housing (1), and a projection screen body (7) extending toward the outside of the housing (1) is wound around the outer side of the winder (5); The collecting box (2) is slidably mounted on the inner bottom end of the housing (1), and the side of the collecting box (2) is provided with an auxiliary roller group for horizontally moving the projection screen body (7) above the collecting box (2) when in use; The cleaning component (9) is installed on the inner side of the collection box (2) and the top end is in contact with the surface of the projection screen body (7).

2. The lifting projection screen according to claim 1, characterized in that: A first cavity (11) and a second cavity (12) are provided on the inner side of the shell (1); the winder (5) is located in the first cavity (11); and the collecting box (2) and the auxiliary roller group are located in the second cavity (12).

3. The lifting projection screen according to claim 1, characterized in that: The cleaning assembly (9) includes a support rod (91), a sleeve (92), a scraper (93) and a torsion spring (94); The support rod (91) is installed on the inner side of the collection box (2); The sleeve (92) is sleeved on the middle part of the support rod (91); The scraper (93) is installed obliquely on the outside of the sleeve (92); The torsion spring (94) is sleeved on the end of the support rod (91) and connected to the scraper (93).

4. The lifting projection screen according to claim 1, characterized in that: Baffles (10) are provided on the inner side of the shell (1) and on both sides of the collection box (2), and the collection box (2) is slidably connected to the baffles (10).

5. The lifting projection screen according to claim 1, characterized in that: A locking block (3) extending toward the inside of the shell (1) is slidably mounted on the end of the collection box (2), and the end of the locking block (3) contacts the inner wall of the shell (1).

6. The lifting projection screen according to claim 1, characterized in that: A counterweight bar (13) is provided at the end of the projection screen body (7), and a through hole is provided at the bottom end of the shell (1). When the winder (5) winds up the projection screen body (7), the counterweight bar (13) is accommodated in the through hole of the shell (1).

7. The lifting projection screen according to claim 1, characterized in that: A bulge (4) is provided at the bottom of one end of the collecting box (2), and an anti-slip pattern is provided at the bottom end of the bulge (4).

8. The lifting projection screen according to claim 1, characterized in that: The auxiliary roller group includes a limiting roller (8) and a pinch roller (6); The limiting roller (8) is installed at the bottom end of the inner side of the housing (1) and is located above the collecting box (2); The pinch roller (6) is installed on the side of the collecting box (2) and is located on the side of the collecting box (2). The height of the pinch roller (6) is greater than the height of the collecting box (2).

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