Projection screen

Abstract

The utility model discloses a projection screen which comprises an inner frame, an outer frame and a curtain. The inner frame is fixedly mounted in the outer frame; the back of the outer frame is provided with a fixing groove / hole used for being installed with the outside. A tensioning edge is arranged on the edge of the inner frame, the curtain is located on the front face of the inner frame, and the edge of the curtain is overturned to cover the tensioning edge. A drag hook set is arranged on the back face of the inner frame and comprises a plurality of tension springs arranged in an arrayed mode, the two ends of each tension spring are connected with the edge of the curtain and the inner frame respectively, one end of each tension spring can swing relative to the inner frame, the drag hook set is arranged on the back face of the inner frame, the width size requirements of the inner frame and the outer frame can be greatly reduced, and therefore the attractiveness is greatly improved; the tensioning spring is matched with the tensioning edge to ensure the tensioning degree of the curtain, so that the planeness of the curtain is ensured in the tensioning state of the curtain, and the picture quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to projection technology field, more specifically, it is a projection screen. BACKGROUND

[0002] With the continuous development of science and technology, projection technology is increasingly perfect, more and more people will choose projection as the first choice of picture display, wherein, projection mainly includes host computer and projection screen composition, host computer irradiates light beam to projection screen to complete picture display.

[0003] The present projection screen is generally composed of a screen cloth and a mounting frame, wherein, in order to realize the tight fixation of the screen cloth, a plurality of arranged holes are arranged on the edge of the screen cloth, and further, a elastic hooking piece is arranged on the mounting frame and connected with the holes to complete the tight fixation of the screen cloth. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a projection screen, which sets the tension spring on the back surface of the inner frame to achieve the purpose of hiding and greatly reducing the width of the frame, and cooperates with the setting of the tension edge to ensure the tension of the projection screen itself, thereby ensuring the overall quality of the picture.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A projection screen, comprising an inner frame, an outer frame and a screen cloth;

[0007] The inner frame is fixedly installed in the outer frame; the back surface of the outer frame is provided with a fixing groove / hole for installation with the outside world;

[0008] The edge of the inner frame is provided with a tension edge, the screen cloth is located on the front surface of the inner frame, and the edge of the screen cloth is turned over to cover the tension edge;

[0009] The back surface of the inner frame is provided with a hook group, the hook group comprises a plurality of arranged tension springs, the two ends of the tension spring are connected with the edge of the screen cloth and the inner frame respectively, and one end of the tension spring can swing relative to the inner frame.

[0010] The utility model has the advantages of:

[0011] 1. By setting the hook group on the back surface of the inner frame, the width size requirement of the inner frame and the outer frame can be greatly reduced, thereby greatly improving the aesthetic appearance;

[0012] 2. The curtain is guaranteed to be tight by the tension spring and the tension edge, so that the flatness of the curtain is guaranteed in the tight state, and the picture quality is guaranteed.

[0013] 3. The torque of the tension spring is reduced by the swing of the tension spring, so that the twist of the curtain is reduced, and the picture quality is further guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole installation front view of the utility model;

[0015] Figure 2 It is a whole installation back view of the utility model;

[0016] Figure 3 It is an inner frame back installation view of the utility model;

[0017] Figure 4 It is an inner frame front installation view of the utility model;

[0018] Figure 5 It is an inner frame and outer frame connection view of the utility model;

[0019] Figure 6 It is an inner frame and outer frame installation section view of the utility model.

[0020] Reference signs: 1, inner frame; 2, outer frame; 3, curtain; 4, fixed groove; 5, tension edge; 6, pull hook group; 7, tension spring; 8, installation groove; 9, tension hook; 10, sliding base; 11, hook head; 12, shielding surface; 13, protruding block; 14, lamp strip groove; 15, gap; 16, frame body; 17, first connecting groove; 18, first connecting piece; 19, first plug-in part; 20, first connecting hole; 21, second connecting piece; 22, second connecting hole; 23, second connecting groove; 24, second plug-in part; 25, third connecting groove; 26, third connecting piece; 27, third plug-in part; 28, third connecting hole. DETAILED DESCRIPTION

[0021] The application will be further described in detail below in combination with the drawings and embodiments. Identical parts are denoted by identical reference signs. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific part.

[0022] Refer to Fig. 1 to Fig. Figure 6To achieve the above object, the present application provides the following technical scheme: A projection screen, comprising an inner frame 1, an outer frame 2 and a screen cloth 3, in a specific way, the inner frame 1 is triangular, circular or other regular or irregular shape, in this embodiment, the inner frame 1 is rectangular, and the outer frame 2 is shaped to cooperate with the inner frame 1, so that the outer frame 2 can be sleeved outside the inner frame 1, so that the inner frame 1 is fixedly installed in the outer frame 2.

[0023] Further, the inner frame 1 is provided with a tensioning edge 5, which is preferably arc-shaped and protrudes towards the front of the inner frame 1, and the screen cloth 3 is located on the front of the inner frame 1, and the edge of the screen cloth 3 is turned over to cover the tensioning edge 5, specifically, since the tensioning edge 5 is arc-shaped, the edge of the screen cloth 3 will only partially cover the tensioning edge 5, thereby reducing the contact range of the edge of the screen cloth 3 and the tensioning edge 5, thereby reducing the planar accuracy of the position of the tensioning edge 5, to reduce the processing difficulty, at the same time, due to the protruding arrangement of the tensioning edge 5, after the screen cloth 3 is tensioned, a gap 15 is formed between the screen cloth 3 and the inner frame 1, thereby further expanding the installation range of the inner side of the inner frame 1, to facilitate the installation of other devices.

[0024] Referring to Figure 3 and 6 , in order to realize the connection and fixation of the inner frame 1 and the screen cloth 3, the back of the inner frame 1 is provided with a set of hooks 6, which comprises a plurality of tensioning springs 7 arranged in an array, wherein, in this embodiment, the edge of the screen cloth 3 is arranged to form a hole along the length direction; in another way, the connection with the tensioning spring 7 can also be achieved in the way of extending the sleeve ring outwardly from the edge of the screen cloth 3, the two ends of the tensioning spring 7 are respectively connected to the edge of the screen cloth 3 and the inner frame 1, and one end of the tensioning spring 7 can swing relative to the inner frame 1, due to the swinging of the tensioning spring 7, after tensioning, the torque generated during the connection of the tensioning spring 7 itself can be reduced through the swinging of this end, thereby reducing the adverse effects of the torque on the screen cloth 3, to ensure the service life of the screen cloth 3 and the picture quality.

[0025] Specifically, in order to realize the connection of the tensioning spring 7, the back of the inner frame 1 is provided with a mounting groove 8 parallel to the tensioning edge 5, a plurality of tensioning hooks 9 are slidably arranged in the mounting groove 8, the tensioning hook 9 comprises a sliding base 10 and a hook head 11, the sliding base 10 is limited to slide in the mounting groove 8, and the hook head 11 is hooked with the tensioning spring 7 to realize the relative swinging of the end of the tensioning spring 7, at the same time, the overall structure is simpler, the sliding of the tensioning hook 9 can adjust the position of the tensioning hook 9 according to the position of the tensioning spring 7, so as to keep the tensioning direction of the tensioning spring 7 towards the center direction of the screen cloth 3, which can not only ensure the uniform stress of the screen cloth 3, but also further avoid the generation of wrinkles, thereby improving the overall flatness, thereby improving the picture quality.

[0026] Specifically, the sliding base 10 is convex and cooperates with the mounting groove 8. The convex shape enables the sliding of the sliding base 10 and limits the sliding base 10 and the mounting groove 8, thereby avoiding the falling of the sliding base 10 under the action of the tension spring 7.

[0027] With reference to Figures 5-6 The outer frame 2 and the inner frame 1 each include a plurality of frame bodies 16 that are enclosed and spliced. Since the inner frame 1 and the outer frame 2 are both rectangular in the embodiment, the number of the frame bodies 16 is four to correspond to the four sides of the rectangle. It can be conceived that two symmetrically arranged frame bodies 16 can be arranged in an arc shape to achieve a curved screen projection effect, which is prior art and will not be described in detail here.

[0028] The outer sides of adjacent frame bodies 16 are provided with mutually corresponding first connecting grooves 17 that extend along the length direction of the frame bodies 16. First connecting pieces 18 are arranged between the adjacent frame bodies 16. The first connecting pieces 18 are provided with first plug-in parts 19 corresponding to the first connecting grooves 17 and are plugged into the first connecting grooves 17. In use, the end portions of the two frame bodies 16 are aligned by abutting against each other, and the two first plug-in parts 19 are respectively inserted into the first connecting grooves 17 to complete the connection between the two frame bodies 16. Further, in order to improve the connection stability between the frame bodies 16, the first plug-in parts 19 are provided with first connecting holes 20 in the embodiment. The connection between the connecting pieces and the frame bodies 16 can be completed through the first connecting holes 20 and bolts, thereby enhancing the fixing effect between the adjacent frame bodies 16.

[0029] In order to realize the mutual fixation of the inner frame 1 and the outer frame 2, the inner frame 1 is provided with a second connecting piece 21 on the back surface. The second connecting piece 21 is provided with a second connecting hole 22. The second connecting hole 22 is connected to the outer frame 2 through a bolt to keep the inner frame 1 and the outer frame 2 fixed. In another mode, any one of the fixing modes in other prior art can be used to realize the fixation of the inner frame 1 and the outer frame 2, including gluing, clamping, etc.

[0030] Further, the frame bodies 16 corresponding to the inner frame 1 are provided with second connecting grooves 23 that are arranged correspondingly and extend along the length direction of the frame bodies 16. The second connecting piece 21 is arranged corresponding to the second connecting grooves 23. The second connecting piece 21 is provided with a second plug-in part 24 corresponding to the second connecting grooves 23 and is plugged into the second connecting grooves 23.

[0031] The cooperation of the second connecting grooves 23 and the second connecting piece 21 can realize the double-layer fixation between the frame bodies 16 corresponding to the inner frame 1 while realizing the connection of the inner frame 1 and the outer frame 2, thereby improving the connection strength and stability between the adjacent frame bodies 16.

[0032] Further, the outer frame 2 is provided with a third connecting groove 25 corresponding to the back of the frame body 16, and a third connecting piece 26 is arranged between adjacent frame bodies 16, the third connecting piece 26 is provided with a third plug-in part 27 corresponding to the third connecting groove 25 and is plugged into the third connecting groove 25, and the third connecting piece 26 is provided with a third connecting hole 28, which can be connected and fixed with the frame body 16 by means of a bolt.

[0033] The third connecting piece 26 is plugged in to realize double-layer fixing of the frame body 16 corresponding to the outer frame 2, thereby improving the connection strength and stability of the frame body 16 corresponding to the outer frame 2.

[0034] Meanwhile, in the embodiment, the third connecting groove 25 is opened to the back of the outer frame 2 to form a fixing groove 4 on the back of the outer frame 2 for mounting with an external structure, and in another way, other fixing holes / grooves can be additionally arranged on the back of the outer frame 2 to realize the fixing of the outer frame 2 with the external structure, wherein the connection and fixing of the outer frame 2 with the external structure can also be realized by clamping, bolt fixing or any other connection and fixing method in the prior art.

[0035] Referring to Figure 6 , the outer frame 2 is provided with a shielding surface 12 corresponding to the front of the tensioning edge 5, and the shielding surface 12 is provided with a protrusion 13 corresponding to the starting position of the curtain 3 covering the tensioning edge 5.

[0036] The shielding surface 12 can shield the tensioning edge 5 to improve the overall appearance, and the protrusion 13 can limit the position of the tensioning edge 5 to reduce the smoothness of the bending position of the curtain 3 and reduce the entry of external dust into the interior.

[0037] Further, the back of the outer frame 2 is provided with a lamp strip groove 14 for mounting a lamp strip.

[0038] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A projection screen, characterized by It comprises an inner frame (1), an outer frame (2) and a curtain (3); The inner frame (1) is fixedly installed in the outer frame (2); the back of the outer frame (2) is provided with a fixing groove (4) / hole for installation with external structure; The edge of the inner frame (1) is provided with a tensioning edge (5), the curtain (3) is located on the front of the inner frame (1), and the edge of the curtain (3) is turned over to cover the tensioning edge (5); The back of the inner frame (1) is provided with a set of hooks (6), the set of hooks (6) comprises a plurality of tensioning springs (7) arranged in an array, the two ends of the tensioning spring (7) are connected with the edge of the curtain (3) and the inner frame (1) respectively, and one end of the tensioning spring (7) can swing relative to the inner frame (1).

2. A projection screen according to claim 1, wherein The back of the inner frame (1) is provided with an installation groove (8) parallel to the tensioning edge (5), a plurality of tensioning hooks (9) are slidably arranged in the installation groove (8), the tensioning hook (9) comprises a sliding base (10) and a hook head (11), the sliding base (10) is limitedly slid in the installation groove (8), and the hook head (11) is hooked with the tensioning spring (7).

3. A projection screen according to claim 2, wherein The sliding base (10) is convex and cooperates with the installation groove (8).

4. A projection screen according to claim 1, wherein The front of the outer frame (2) corresponding to the tensioning edge (5) is provided with a shielding surface (12), the shielding surface (12) is provided with a protrusion (13) corresponding to the starting position of the curtain (3) covering the tensioning edge (5) and towards the tensioning edge (5).

5. A projection screen according to claim 1, wherein The back of the outer frame (2) is provided with a lamp strip groove (14) for installing a lamp strip.

6. A projection screen according to claim 1, wherein The tensioning edge (5) is arc-shaped and protrudes towards the front relative to the inner frame (1), the edge of the curtain (3) covers part of the tensioning edge (5), so that a gap (15) is formed between the curtain (3) and the inner frame (1) through the tensioning edge (5).

7. A projection screen according to any one of claims 1-6, characterized in that The outer frame (2) and the inner frame (1) each comprise a plurality of frame bodies (16) that are enclosed and spliced, the outer sides of adjacent frame bodies (16) are provided with first connecting grooves (17) corresponding to each other, and first connecting pieces (18) are arranged between adjacent frame bodies (16), the first connecting piece (18) is provided with a first plug-in part (19) corresponding to the first connecting grooves (17) on both sides and is plugged with the first connecting grooves (17).

8. A projection screen according to claim 7, wherein The back of the inner frame (1) is provided with a second connecting piece (21), the second connecting piece (21) is provided with a second connecting hole (22), and the second connecting hole (22) is connected with the outer frame (2) by a bolt to fix the inner frame (1) and the outer frame (2).

9. A projection screen according to claim 8, wherein The inner frame (1) is provided with a second connecting groove (23) corresponding to the frame bodies (16) and arranged correspondingly, the second connecting piece (21) is arranged corresponding to the second connecting groove (23), the second connecting piece (21) is provided with a second plug-in part (24) corresponding to the second connecting groove (23) and is plugged with the second connecting groove (23).

10. A projection screen according to claim 9, wherein The outer frame (2) is provided with third connecting grooves (25) corresponding to each other between the back of the frame body (16), and third connecting pieces (26) are arranged between adjacent frame bodies (16), the third connecting pieces (26) are provided with third plug-in parts (27) corresponding to the third connecting grooves (25) and are plugged into the third connecting grooves (25), and the third connecting pieces (26) are provided with third connecting holes (28).

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