Frame type projection curtain

Abstract

The utility model discloses a frame type projection curtain which comprises a frame, the inner side of the frame is provided with a curtain, the left side and the right side of the frame are both provided with strip-shaped grooves, the two ends of the curtain penetrate through the two strip-shaped grooves respectively, the upper side and the lower side of each strip-shaped groove are both provided with sliding grooves, and a U-shaped frame is arranged between the two sliding grooves. When the curtain is replaced, only the nuts at the two ends of the connecting rod need to be unscrewed, then the connecting rod is pulled out of the U-shaped frame, so that the connecting rod is separated from the edge of the cloth cover, and then the curtain can be pulled out of the frame to be replaced, so that the operation is simple and convenient; the magnet strips attract the soft magnetic tapes through magnetic force, so that the upper and lower sides of the curtain are stably attached to the magnet strips, and the upper and lower sides of the curtain are prevented from tilting to influence the flatness of the curtain.

Description

Technical Field

[0001] The utility model relates to a frame-type projection screen. Background Art

[0002] A frame-type projection screen is a common projection display device, which consists of a rigid frame and a screen attached to the frame. The characteristic of this screen is that the screen can be fixed and mounted on a wall or placed on a bracket, providing better picture stability and viewing angle. The frames of many existing frame-type projection screens are usually composed of an inner frame and an outer frame. The screen is installed between the inner and outer frames, and a spring hook is needed to tighten the screen. However, when replacing the screen, the inner and outer frames need to be disassembled first, and then the spring hooks need to be removed before the screen can be replaced, which makes the screen replacement operation troublesome and inconvenient. Therefore, it is necessary to develop a frame-type projection screen to solve the above problems. Utility Model Content

[0003] The purpose of the present invention is to provide a frame-type projection screen to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] A frame-type projection screen includes a frame, a screen is provided on the inner side of the frame, strip grooves are provided on the left and right sides of the frame, and the two ends of the screen pass through the two strip grooves respectively, each of the strip grooves is provided with a slide groove on the upper and lower sides, a U-shaped frame is provided between the two slide grooves, the two ends of the U-shaped frame are respectively slidably connected to the two slide grooves, a spring is connected between the end of the U-shaped frame and the inner wall of the slide groove, connecting rods and cloth covers are provided on the left and right sides of the screen, the cloth covers are connected to the screen, the connecting rods pass through the cloth covers, and through holes corresponding to the connecting rods are provided on the two side walls of the U-shaped frame, and the two ends of the connecting rods pass through the through holes on the two side walls of the U-shaped frame respectively.

[0006] Preferably, the surfaces of both ends of the connecting rod are provided with threads, and nuts are provided on the threaded parts at both ends of the connecting rod.

[0007] Preferably, magnet strips are provided on the upper and lower side walls of the frame, and soft magnetic tapes are provided on the upper and lower sides of the curtain, and the soft magnetic tapes are in contact with the magnet strips.

[0008] Preferably, the curtain is made of fiberglass, and the cloth edging is made of Oxford cloth.

[0009] Preferably, the frame and the U-shaped frame are made of aluminum alloy, and the connecting rod is made of polyurethane rubber.

[0010] The beneficial effects of the present invention are as follows: when replacing the screen, it is only necessary to unscrew the nuts at both ends of the connecting rod and then pull the connecting rod out of the U-shaped frame to separate the connecting rod from the edge of the cloth cover. After that, the screen can be pulled out of the frame for replacement, and the operation is simple and convenient; the magnetic strips attract the soft magnetic tape through magnetic force, so that the upper and lower sides of the screen are stably attached to the magnetic strips, thereby preventing the upper and lower sides of the screen from warping up and affecting the flatness of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art, but this does not limit the scope of protection of the present invention.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the utility model;

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the structure of the middle U-shaped frame and connecting rod;

[0015] Figure 4 For this utility model Figure 2 A in the middle is an enlarged schematic diagram;

[0016] Figure 5 For this utility model Figure 2 Schematic diagram of the structure of the middle frame;

[0017] Figure 6 For this utility model Figure 2 Schematic diagram of the structure of the middle curtain.

[0018] In the figure: 11, frame; 12, curtain; 13, magnet strip; 14, U-shaped frame; 15, connecting rod; 16, nut; 17, slide; 18, spring; 19, strip groove; 20, soft magnetic tape; 21, cloth edge. DETAILED DESCRIPTION

[0019] See Figures 1 to 6A frame-type projection screen shown in the figure includes a frame 11, a screen 12 is provided on the inner side of the frame 11, and strip grooves 19 are provided on the left and right sides of the frame 11, and the two ends of the screen 12 pass through the two strip grooves 19 respectively, and each of the strip grooves 19 is provided with a slide groove 17 on the upper and lower sides, and a U-shaped frame 14 is provided between the two slide grooves 17, and the two ends of the U-shaped frame 14 are respectively slidably connected to the two slide grooves 17, and a spring 18 is connected between the end of the U-shaped frame 14 and the inner wall of the slide groove 17, and the left and right sides of the screen 12 are provided with a connecting rod 15 and a cloth cover edge 21, and the cloth cover edge 21 is connected to the screen 12, and the connecting rod 15 passes through the cloth cover edge 21, and the two side walls of the U-shaped frame 14 are provided with through holes corresponding to the connecting rod 15, and the two ends of the connecting rod 15 pass through the through holes on the two side walls of the U-shaped frame 14 respectively.

[0020] Furthermore, threads are provided on the surfaces of both ends of the connecting rod 15 , and nuts 16 are provided on the threaded portions at both ends of the connecting rod 15 .

[0021] Furthermore, magnet strips 13 are provided on the upper and lower side walls of the frame 11, and soft magnetic tapes 20 are provided on the upper and lower sides of the screen 12, and the soft magnetic tapes 20 are in contact with the magnet strips 13; the magnet strips 13 adsorb the soft magnetic tapes 20 through magnetic force, so that the upper and lower sides of the screen 12 are stably attached to the magnet strips 13, thereby preventing the upper and lower sides of the screen 12 from warping up and affecting the flatness of the screen 12.

[0022] Furthermore, the curtain 12 is made of fiberglass, and the cloth edging 21 is made of Oxford cloth. The fiberglass curtain 12 has good flatness and excellent image gain performance, which can make the image projected thereon clear and bright. The cloth edging 21 made of Oxford cloth is strong, wear-resistant, and has strong tear resistance.

[0023] Furthermore, the frame 11 and the U-shaped frame 14 are made of aluminum alloy, and the connecting rod 15 is made of polyurethane rubber; the frame 11 and the U-shaped frame 14 made of aluminum alloy have high structural strength and are light in weight; the connecting rod 15 made of polyurethane rubber is relatively soft in texture, and when the connecting rod 15 passes through the cloth cover edge 21, it can prevent the connecting rod 15 from piercing the cloth cover edge 21.

[0024] The working principle of the present invention is that when replacing the curtain 12, the nuts 16 at both ends of the connecting rod 15 are unscrewed, and the connecting rod 15 is pulled out from the U-shaped frame 14. At this time, the connecting rod 15 is separated from the cloth sleeve 21, and then the curtain 12 can be pulled out from the frame 11, and then the new curtain 12 is placed on the inner side of the frame 11, so that the two ends of the curtain 12 pass through the two strip grooves 19 respectively, and the soft magnetic tapes 20 on the upper and lower sides of the curtain 12 fit with the magnet strips 13, and then the U-shaped frame 14 is pressed to make the U-shaped frame 14 close to the side of the frame 11, and then the connecting rod 15 passes through the through holes and cloth sleeve 21 on the side wall of the U-shaped frame 14, and screws on the nuts 16 at both ends of the connecting rod 15, and then loosens the U-shaped frame 14. The U-shaped frame 14 is away from the side of the frame 11 under the action of the spring 18, so that the two connecting rods 15 tighten the curtain 12 from both sides, making the curtain 12 taut, and the curtain 12 can be replaced.

[0025] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that do not require creative work should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A frame-type projection screen, characterized by: It includes a frame, a curtain is provided on the inner side of the frame, strip grooves are provided on the left and right sides of the frame, the two ends of the curtain pass through the two strip grooves respectively, each of the strip grooves is provided with a slide groove on the upper and lower sides, a U-shaped frame is provided between the two slide grooves, the two ends of the U-shaped frame are respectively slidably connected to the two slide grooves, a spring is connected between the end of the U-shaped frame and the inner wall of the slide groove, connecting rods and cloth sleeve edges are provided on the left and right sides of the curtain, the cloth sleeve edges are connected to the curtain, the connecting rod passes through the cloth sleeve edges, and through holes corresponding to the connecting rods are provided on the two side walls of the U-shaped frame, and the two ends of the connecting rod pass through the through holes on the two side walls of the U-shaped frame respectively.

2. The frame-type projection screen according to claim 1, characterized in that: Threads are provided on the surfaces of both ends of the connecting rod, and nuts are provided on the threaded parts of both ends of the connecting rod.

3. The frame-type projection screen according to claim 1, characterized in that: Magnetic strips are arranged on the upper and lower side walls of the frame, and soft magnetic tapes are arranged on the upper and lower sides of the curtain, and the soft magnetic tapes are fitted with the magnetic strips.

4. The frame-type projection screen according to claim 1, characterized in that: The curtain is made of glass fiber, and the cloth edge is made of Oxford cloth.

5. The frame-type projection screen according to claim 1, characterized in that: The frame and the U-shaped frame are made of aluminum alloy, and the connecting rod is made of polyurethane rubber.

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