Projection screen and projection system

Abstract

The utility model provides a projection screen and a projection system, and the projection screen comprises a display diaphragm which is provided with a projection light-receiving surface; the screen frame comprises two side frames, the side frames are integrated side frames, the two side frames are connected to surround the periphery of the display membrane, each side frame comprises a first side frame and a second side frame, the first side frame and the second side frame are rotationally connected, and the second side frame comprises a first section and a second section; the connecting assembly comprises a rotary connecting piece, and the first section and the second section are connected with the rotary connecting piece; the adjusting part is located between the first section and the second section, and the rotary connecting part is rotationally arranged on the adjusting part and moves on the adjusting part so that the distance between the first section and the second section can be changed. According to the utility model, convenient home entry is realized, the gap of the second frame after assembly is reduced, and the stability after assembly is improved.

Description

Technical Field

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

[0002] With the continuous development of society, people's pursuits are also constantly changing, and laser TVs are becoming more and more popular among the public. As an important part of a laser TV, the larger the size of the laser TV screen, the better the viewing experience.

[0003] Currently, during in-home installation, due to the large size of the entire screen frame, it is inconvenient during the entire transportation and installation process.

[0004] The foregoing description is provided to give general background information and does not necessarily constitute prior art. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a projection screen and a projection system, which can achieve convenient in-home installation, and at the same time reduce the gap after the second frame is assembled, improving the stability after assembly.

[0006] To achieve the above object, in the first aspect, the utility model provides a projection screen, including:

[0007] A display film, the display film having a projection light-receiving surface;

[0008] A screen frame, the screen frame including two side frames, the two side frames being connected to surround the outer periphery of the display film, the side frame including a first frame and a second frame, the first frame and the second frame being rotatably connected, and the second frame including a first section and a second section;

[0009] A connection component, including:

[0010] A rotating connecting piece, the first section and the second section being respectively connected to the rotating connecting piece;

[0011] An adjusting piece, the adjusting piece being located between the first section and the second section, the rotating connecting piece being rotatably arranged on the adjusting piece and moving on the adjusting piece so that the distance between the first section and the second section is variable.

[0012] The beneficial effects of the utility model are as follows: Through the foldable design of the screen frame, the scattered projection screen is folded. On the one hand, the in-home volume of the screen can be reduced, achieving convenient in-home installation, reducing the transportation and / or in-home volume, and solving the problem of in-home installation of large-size screens; on the other hand, when assembling the screen frame at the user's home, the folding and fixing are simple. Removing the traditional hinge structure for folding and using a rotating connecting piece is simpler and more ingenious, reducing costs and significantly improving the installation speed; in addition, through the mutual cooperation of the adjusting piece and the rotating connecting piece, the gap after the second frame is assembled is reduced to improve the stability after assembly.

[0013] Based on the above technical solutions, the present utility model can also be improved as follows.

[0014] In some alternative embodiments, the screen frame has a flattened state and a folded state. When the screen frame switches from the folded state to the flattened state, the rotating connecting member moves to the first position, driving the first section and the second section to move towards each other;

[0015] When the screen frame switches from the flattened state to the folded state, the rotating connecting member moves to the second position, driving the first section and the second section to move away from each other;

[0016] Wherein, the first position is the middle part of the adjusting member, and the second position is the end part of the adjusting member.

[0017] In some alternative embodiments, the first section has a first groove, and the second section has a second groove. The notch of the first groove is communicated with the notch of the second groove to form an accommodating cavity, and the adjusting member is located in the accommodating cavity.

[0018] In some alternative embodiments, at least one adjusting hole is formed in the adjusting member. The adjusting hole penetrates through the opposite sides of the adjusting member along the width direction of the second frame, and the rotating connecting member is movable in the adjusting hole;

[0019] A first rotating hole is formed in the first section. Part of the rotating connecting member passes through the first rotating hole and the adjusting hole and rotates in the first rotating hole and the adjusting hole;

[0020] A second rotating hole is formed in the second section. Another part of the rotating connecting member passes through the second rotating hole and part of the adjusting hole and rotates in the second rotating hole and the other part of the adjusting hole to fold the first section and the second section.

[0021] In some alternative embodiments, at least one adjusting hole includes a first adjusting hole and a second adjusting hole. The first adjusting hole and the second adjusting hole are arranged at intervals along the length direction of the adjusting member. The position of the first adjusting hole matches the position of the first section, and the position of the second adjusting hole matches the position of the second section;

[0022] Part of the rotating connecting member rotates through the first rotating hole and the first adjusting hole, and another part of the rotating connecting member rotates through the second rotating hole and the second adjusting hole.

[0023] In some alternative embodiments, the adjusting hole is an oblong hole;

[0024] The adjusting hole extends along the length direction of the second frame.

[0025] In some alternative embodiments, both the first frame and the second frame are integrally formed structures.

[0026] In some alternative embodiments, the screen frame further includes a pull rod, and the pull rod is connected to the end of the display diaphragm;

[0027] A notch is formed in the side frame at the connection between the first side frame and the second side frame, and the pull rod passes through the notch to be installed inside the side frame.

[0028] In some alternative embodiments, the screen frame further includes a plug block, and the plug block seals the notch.

[0029] In some alternative embodiments, the rotating connecting member is a pin shaft;

[0030] A first connection hole is formed in the first side frame, and a second connection hole is formed in the second side frame. The rotating connecting member passes through the first connection hole and the second connection hole to enable the first side frame to rotate relative to the second side frame.

[0031] In a second aspect, the present utility model further provides a projection system, including a projection device and the above-mentioned projection screen, and the projection device is used to project a projection image onto the projection screen.

[0032] The projection screen and the projection system provided by the present utility model, the projection system includes a projection device and the above-mentioned projection screen, and the projection device is used to project a projection image onto the projection screen; wherein, the projection screen includes: a display diaphragm, the display diaphragm has a projection light-receiving surface; a screen frame, the screen frame includes two side frames, and the two side frames are connected to surround the outer periphery of the display diaphragm, the side frame includes a first side frame and a second side frame, the first side frame and the second side frame are rotatably connected, and the second side frame includes a first section and a second section; a connection assembly, including: a rotating connecting member, the first section and the second section are respectively connected to the rotating connecting member; an adjusting member, the adjusting member is located between the first section and the second section, the rotating connecting member is rotatably arranged on the adjusting member and moves on the adjusting member to make the distance between the first section and the second section variable.

[0033] Through the foldable design of the screen frame, the scattered projection screen is folded. On the one hand, it can reduce the entry volume of the screen, realize convenient entry, reduce the transportation and / or entry volume, and solve the problem of large-size screen entry; on the other hand, when assembling the screen frame at the user's home, the folding and fixing are simple. Removing the traditional hinge structure for folding and using a rotating connecting member is simpler and more ingenious, the cost is reduced, and the installation speed can be significantly improved; in addition, through the mutual cooperation of the adjusting member and the rotating connecting member, the gap between the second side frames is reduced after assembly to improve the stability after assembly. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 Schematic diagram of the first state of a folding frame provided by the prior art;

[0036] Figure 2 Schematic diagram of the second state of a folding frame provided by the prior art;

[0037] Figure 3 Schematic diagram of the structure of the first hinge structure in a folding frame provided by the prior art;

[0038] Figure 4 Schematic cross-sectional view of a projection screen provided by the prior art;

[0039] Figure 5 Schematic diagram after installation of a projection screen provided by the prior art;

[0040] Figure 6 Explosion schematic diagram of a projection screen provided by an embodiment of the present invention;

[0041] Figure 7 Schematic diagram of the structure of the screen frame in a projection screen provided by an embodiment of the present invention;

[0042] Figure 8 Explosion schematic diagram of the screen frame in a projection screen provided by an embodiment of the present invention;

[0043] Figure 9 Schematic diagram of the structure of the display diaphragm in a projection screen provided by an embodiment of the present invention;

[0044] Figure 10 Schematic cross-sectional view of a projection screen provided by an embodiment of the present invention;

[0045] Figure 11 Assembly schematic diagram of the side frame and the connection component in a projection screen provided by an embodiment of the present invention;

[0046] Figure 12 Schematic diagram of the first state of the side frame in a projection screen provided by an embodiment of the present invention;

[0047] Figure 13 Schematic diagram of the second state of the side frame in a projection screen provided by an embodiment of the present invention;

[0048] Figure 14 Schematic diagram of the assembly of the vertical beam, connection component and side frame in the projection screen provided by the embodiment of the present utility model;

[0049] Figure 15 Schematic diagram of the rotatable vertical beam in the projection screen provided by the embodiment of the present utility model;

[0050] Figure 16 Schematic diagram of the assembly of the second frame and the connection component in the first perspective in the projection screen provided by the embodiment of the present utility model;

[0051] Figure 17 Schematic diagram of the assembly of the second frame and the connection component in the second perspective in the projection screen provided by the embodiment of the present utility model;

[0052] Figure 18 Cross-sectional view of the second frame and the connection component in the projection screen provided by the embodiment of the present utility model;

[0053] Figure 19 Schematic diagram of the third state of the side frame in the projection screen provided by the embodiment of the present utility model;

[0054] Figure 20 Schematic diagram of the fourth state of the side frame in the projection screen provided by the embodiment of the present utility model;

[0055] Figure 21 Schematic diagram of the assembly of the first frame and the second frame in the projection screen provided by the embodiment of the present utility model;

[0056] Figure 22 Schematic diagram of the assembly of the vertical beam and the second frame in the projection screen provided by the embodiment of the present utility model;

[0057] Figure 23 Schematic diagram of the assembly of the first section and the second section in the projection screen provided by the embodiment of the present utility model;

[0058] Figure 24 Partial schematic diagram of the screen frame in the projection screen provided by the embodiment of the present utility model;

[0059] Figure 25 Partial cross-sectional view of the screen frame in the projection screen provided by the embodiment of the present utility model;

[0060] Figure 26 Schematic diagram of the first state assembly of the display diaphragm and the pull rod in the projection screen provided by the embodiment of the present utility model;

[0061] Figure 27 Schematic diagram of the second state assembly of the display diaphragm and the pull rod in the projection screen provided by the embodiment of the present utility model;

[0062] Figure 28 Schematic diagram of the first - state assembly of the display diaphragm and the fastening screw in the projection screen provided by the embodiment of the present utility model;

[0063] Figure 29 Schematic diagram of the second - state assembly of the display diaphragm and the fastening screw in the projection screen provided by the embodiment of the present utility model;

[0064] Figure 30 Schematic diagram of the third - state assembly of the display diaphragm and the fastening screw in the projection screen provided by the embodiment of the present utility model;

[0065] Figure 31 Explosion diagram between the notch and the plug block in the projection screen provided by the embodiment of the present utility model;

[0066] Figure 32 Assembly diagram between the notch and the plug block in the projection screen provided by the embodiment of the present utility model.

[0067] Explanation of reference numerals:

[0068] 100 - projection screen;

[0069] 110 - display diaphragm; 111 - diaphragm body; 112 - synthetic cloth; 1121 - cloth bag; 101 - inner frame; 102 - outer frame;

[0070] 120 - screen frame; 121 - first side frame; 1211 - first connection hole; 122 - second side frame; 1221 - first section; 12211 - first rotation hole; 12212 - first groove; 1222 - second section; 12221 - second rotation hole; 12222 - second groove; 1223 - second connection hole; 123 - vertical beam; 124 - pull rod; 125 - notch; 126 - plug block; 127 - mounting screw; 128 - fastening screw; 129 - lever;

[0071] 130 - connection assembly; 131 - rotating connection member; 132 - adjusting member; 1321 - first adjusting hole; 1322 - second adjusting hole;

[0072] 200 - folding frame; 210 - long - side frame; 220 - short - side frame; 230 - first hinge structure. Detailed implementation manners

[0073] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without any creative work belong to the scope of protection of the present utility model. All other embodiments obtained belong to the scope of protection of the present utility model. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0074] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath", and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0076] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0077] Currently, during in-home installation, due to the large size of the entire screen frame, it is inconvenient during the entire transportation and installation process. Therefore, the screen frame can be designed as a foldable structure, such as the folding frame 200.

[0078] Figure 1 Figure 1 is a schematic diagram of the first state of a folding frame provided by the prior art. Figure 2 Figure 2 is a schematic diagram of the second state of a folding frame provided by the prior art. Figure 3 Figure 3 is a schematic diagram of the structure of the first hinge structure in a folding frame provided by the prior art. Figure 4 Figure 4 is a schematic cross-sectional view of a projection screen provided by the prior art. Figure 5 Figure 5 is a schematic diagram of the projection screen after installation provided by the prior art.

[0079] As Figures 1 to 5 shown, the folding frame 200 includes a long-side frame 210 and a short-side frame 220. The long-side frame 210 is folded once. In order to fold the folding frame 200 in half, a first hinge structure 230 is custom-designed, reducing the in-home volume by half and enabling elevator access. Although the in-home problem is solved, the folding frame 200 is relatively large in volume, resulting in a large packaging volume and inconvenience in both in-home and transfer transportation. Moreover, each hinge structure consists of multiple components, which will increase the variety of materials and structural costs.

[0080] To overcome the defects in the prior art, the projection screen and projection system provided by the present invention, through the foldable design of the screen frame, fold the scattered projection screen. On the one hand, it can reduce the in-home volume of the screen, achieve convenient in-home access, reduce the transportation and / or in-home volume, and solve the problem of in-home access for large-size screens. On the other hand, when assembling the screen frame at the user's home, the folding and fixing are simple. By removing the traditional need for a hinge structure for folding and using a rotating connecting piece, it is simpler and more ingenious, with reduced costs and a significant improvement in the installation speed.

[0081] Next, the content of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can understand the content of the present invention more clearly and in detail.

[0082] Figure 6 Figure 6 is an exploded schematic diagram of a projection screen provided by an embodiment of the present invention. Figure 7 Figure 7 is a schematic diagram of the structure of the screen frame in a projection screen provided by an embodiment of the present invention. Figure 8 Figure 8 is an exploded schematic diagram of the screen frame in a projection screen provided by an embodiment of the present invention.

[0083] As Figures 6 to 8 shown, an embodiment of the present invention provides a projection screen 100, including:

[0084] A display diaphragm 110 having a projection light-receiving surface;

[0085] A screen frame 120, the screen frame 120 includes two side frames, the side frames are integral side frames, the two side frames are connected to surround the outer periphery of the display diaphragm 110, the side frame includes a first side frame 121 and a second side frame 122, wherein the length of the second side frame 122 is longer than the length of the first side frame 121;

[0086] A connection component 130, the connection component 130 includes at least one rotating connection member 131, the rotating connection member 131 passes through the first side frame 121 and the second side frame 122 to rotatably connect the first side frame 121 relative to the second side frame 122.

[0087] The second side frame 122 includes a first section 1221 and a second section 1222, the first section 1221 and the second section 1222 are respectively connected to the rotating connection member 131;

[0088] As Figure 16 shown, the connection component 130 further includes an adjusting member 132, the adjusting member 132 is located between the first section 1221 and the second section 1222 and is used to adjust the distance between the first section 1221 and the second section 1222, the rotating connection member 131 is rotatably arranged on the adjusting member 132 and moves on the adjusting member 132 to make the distance between the first section 1221 and the second section 1222 variable;

[0089] Wherein, part of the rotating connection members 131 rotatably connect the first section 1221 and the first end of the adjusting member 132 to make the first section 1221 rotate relative to the second section 1222, and the other part of the rotating connection members 131 rotatably connect the second section 1222 and the second end of the adjusting member 132 to make the second section 1222 rotate relative to the first section 1221.

[0090] Through the above settings, that is, through the foldable design of the screen frame 120, the scattered projection screen 100 is folded. On the one hand, it can reduce the entry volume of the screen, realize convenient entry, reduce the transportation and / or entry volume, and solve the problem of large-size screen entry; on the other hand, when assembling the screen frame 120 at the user's home, the folding and fixing are simple. Removing the traditional hinge structure for folding and using the rotating connection member 131 is simpler and more ingenious, with reduced costs and significantly improved installation speed; in addition, through the mutual cooperation of the adjusting member 132 and the rotating connection member 131, the gap of the second side frame 122 is reduced after assembly to improve the stability after assembly.

[0091] Specifically, traditional hinge structures, such as the first hinge structure 230, the second hinge structure 240, and the third hinge structure 250.

[0092] In some alternative embodiments, the screen frame 120 has a flattened state and a folded state. When the screen frame 120 switches from the folded state to the flattened state, the rotating connecting member 131 moves to the first position, driving the first section 1221 and the second section 1222 to move towards each other;

[0093] When the screen frame 120 switches from the flattened state to the folded state, the rotating connecting member 131 moves to the second position, driving the first section 1221 and the second section 1222 to move away from each other;

[0094] Among them, the first position is the middle of the adjusting member, and the second position is the end of the adjusting member.

[0095] It should be noted that when the screen frame 120 switches from the folded state to the flattened state, the rotating connecting member 131 located on the first section 1221 and the rotating connecting member 131 located on the second section 1222 both move to the first position. Since the rotating connecting member 131 located on the first section 1221 drives the first section 1221 to move when moving, and correspondingly, when the rotating connecting member 131 located on the second section 1222 moves, it drives the second section 1222 to move. Therefore, at this time, the first section 1221 and the second section 1222 move towards each other, thereby reducing the distance between the two.

[0096] Similarly, when the screen frame 120 switches from the flattened state to the folded state, the rotating connecting member 131 located on the first section 1221 and the rotating connecting member 131 located on the second section 1222 both move to the second position. At this time, the first section 1221 and the second section 1222 move away from each other, thereby increasing the distance between the two to provide space for folding between the two.

[0097] It should be noted that the following will specifically describe each structure.

[0098] [Display film 110]

[0099] Figure 9 is a schematic structural diagram of the display film in the projection screen provided by the embodiment of the present invention. As Figure 9 shown, it can be understood that the front surface of the display film 110 is the light-receiving surface for projection.

[0100] It should be noted that the display film 110 usually consists of a hard layer, a Fresnel structure layer, a projection layer, etc., has a certain strength and stiffness, and can have a certain perpendicularity in the vertically freely hanging state so that the display film 110 looks flat. However, since it still has a certain softness, without support or being interfered by external forces, the display film 110 still cannot meet the flatness requirements for display. If the screen is not flat, it will cause problems such as deformation, blurring, uneven brightness, or other deterioration problems when the laser projection image is displayed.

[0101] In order to flatten the display diaphragm 110, in some alternative embodiments, the display diaphragm 110 includes a diaphragm body 111 and a synthetic cloth 112 that are attached to each other.

[0102] Generally, the diaphragm body 111 is made of a rigid material, and the synthetic cloth 112 generally has characteristics such as inelasticity, ultrathinness, density, and high strength. In this way, when the synthetic cloth 112 and the diaphragm body 111 are bonded, an integral structure can be formed between the two, thereby facilitating the transmission of force and enabling the diaphragm body 111 to be stretched following the deformation of the synthetic cloth 112.

[0103] Specifically, the synthetic cloth 112 can generally be a soft cloth. In this way, the synthetic cloth 112 can transmit the acting force well when being stretched, and has relatively stable properties, and can adapt to a relatively wide range of environments. For example, it can maintain good flatness and reliability between the environmental temperatures of -10°C and 40°C.

[0104] [Screen frame 120]

[0105] Figure 10 is a schematic cross-sectional view of the projection screen provided by the embodiment of the present invention. Figure 11 is an assembly schematic diagram of the side frame and the connection component in the projection screen provided by the embodiment of the present invention. Figure 12 is a first-state schematic diagram of the side frame in the projection screen provided by the embodiment of the present invention. Figure 13 is a second-state schematic diagram of the side frame in the projection screen provided by the embodiment of the present invention.

[0106] Refer to Figures 6 to 13 , it should be noted that the screen frame 120 is generally a frame structure, and the screen frame 120 encloses a rectangular or square hollow area, which can be used to place the display diaphragm 110, and the screen frame 120 can surround the edge of the display diaphragm 110 to provide protection for the display diaphragm 110, and the connection and tensioning between the screen frame 120 and the display diaphragm 110 are realized through a deformable or displaceable tensioning module.

[0107] In some examples, the screen frame 120 can be a metal part, and its material can include one or more of copper, iron, aluminum, tin, and lead.

[0108] In other examples, the screen frame 120 can be made of plastic material.

[0109] It should be noted that regarding the specific material of the screen frame 120, the embodiment of the present invention does not limit it too much here.

[0110] Of course, during production and manufacturing, on the premise of ensuring strength, the screen frame 120 can also be made of steel plate, plastic, or synthetic material.

[0111] Among them, in order to facilitate the entry and quick assembly of the projection screen 100, the screen frame 120 can be two side frames, and the first side frame 121 and the second side frame 122 in the side frames can be foldable to reduce the volume for entry.

[0112] It should be noted that the second side frame 122 can be a long side frame, and the first side frame 121 can be a short side frame. The first side frame 121 and the second side frame 122 are assembled with each other to form a side frame, and two side frames are assembled with each other to form the screen frame 120. In practice, it can be determined according to the size, and there is no excessive limitation here.

[0113] Among them, both the first side frame 121 and the second side frame 122 can be foldable, which is convenient for folding the scattered frame structure. On the one hand, it reduces the transportation and / or entry volume, and on the other hand, it can quickly assemble the folded screen frame 120 to improve the product influence.

[0114] In addition, it should be noted that in order to further improve the convenience of assembly, the side frame can be designed as an integrated side frame. Compared with the inner frame and the outer frame in the existing structure, the side frame of the present utility model is designed as an integrated structure of the inner and outer frames, eliminating the procedure of first assembling the inner frame and then assembling the outer frame, reducing the assembly and disassembly processes, and further improving the work efficiency.

[0115] [Connecting component 130]

[0116] It should be noted that the design of using the rotating connecting piece 131 to replace the existing hinge structure can reduce the material cost required for folding while ensuring that the first side frame 121 can rotate relative to the second side frame 122 to achieve the foldable effect of the screen frame 120.

[0117] As Figures 11 to 13 shown, specifically, the rotating connecting piece 131 passes through the first side frame 121 and the second side frame 122, and can rotate relative to the first side frame 121 and the second side frame 122 respectively.

[0118] The foldable inner and outer integrated screen frame 120 mainly plays a role of a skeleton and a decorative role, supporting the stability of the entire display film 110 and the appearance modification. The present utility model makes the inner and outer integrated frame into 2 identical side frames, and each side frame is composed of structural members such as the first side frame 121, the second side frame 122, the vertical beam 123, and the angle iron.

[0119] In some alternative embodiments, the rotating connecting piece 131 is a pin shaft;

[0120] A first connection hole 1211 is formed in the first frame 121, and a second connection hole 1223 is formed in the second frame 122. The rotating connecting member 131 passes through the first connection hole 1211 and the second connection hole 1223, so that the first frame 121 rotates relative to the second frame 122.

[0121] It should be noted that the rotating connecting member 131 is provided as a pin shaft, which can further reduce the material cost. Among them, the first connection hole 1211 and the second connection hole 1223 can be round holes to meet the requirement that the rotating connecting member 131 passes through the first connection hole 1211 and the second connection hole 1223 and rotates therein.

[0122] In some alternative embodiments, both the first frame 121 and the second frame 122 include an inner frame section and an outer frame section;

[0123] The inner frame section and the outer frame section are integrally connected, wherein the outer frame section wraps at least part of the inner frame section.

[0124] It should be noted that the integral connection of the inner frame section and the outer frame section has a fast assembly speed and a small number of materials, enabling small-volume packaging, convenient transportation and entry into the household. The side frame has a high degree of integration and folding, with a fast assembly speed, and is simple, reliable and low-cost at the same time.

[0125] Specifically, the integrated side frame reduces the packaging and household entry volume through folding. The display diaphragm 110 is in a curled form, and by reducing the volume of these two major parts, the household entry and transportation volume are reduced accordingly.

[0126] As Figure 4 and Figure 5 shown, after the projection screen in the existing structure is installed on the wall, only the side and front surfaces of the frame of the outer frame 102 can be observed, which are the two surfaces indicated by the dotted lines in the cross-sectional view. Therefore, the definitions of the inner frame 101 and the outer frame 102 can be distinguished by whether they are visible after being mounted on the wall. The components including the visible side and front surfaces are called the outer frame 102, and the invisible internal components are called the inner frame 101. The existing structure consists of two separate structural parts. During assembly, the inner frame 101 needs to be assembled first, and then the outer frame 102 is assembled.

[0127] As Figure 10 shown, in the present invention, both the first frame 121 and the second frame 122 are integrally formed structures, which means that the inner frame section and the outer frame section of the first frame 121 are integrally formed structures. Therefore, the assembly speed of the present invention is fast.

[0128] In the embodiment of the present utility model, the screen frame 120 integrates the functions of both the inner frame and the outer frame, and designs the inner frame and the outer frame as one component, that is, the screen frame 120 is an integrally formed structure. That is to say, both the first frame 121 and the second frame 122 are integrally formed structures. At the same time, due to the functions of the display film 110 and the wall surface, other structures of the integrated frame form the interior of the frame, which can play a role in structural support. That is to say, the screen frame 120 supports both the stability of the entire screen and the appearance decoration.

[0129] In some examples, the outer frame segment surrounds the outer periphery of the inner frame segment, and the materials used for the inner frame segment and the outer frame segment are the same.

[0130] Regarding the integral connection of the inner frame segment and the outer frame segment, it can be understood that before leaving the factory, the two can be connected into an integral structure by welding or other connecting parts. After folding and curling the display film 110, it is brought into the household and then assembled. When assembling at the user's home, only the side frame needs to be assembled from the folded state into the unfolded state, and then the two unfolded side frames are assembled together, without first assembling the inner frame and then the outer frame, and the overall assembly process is less.

[0131] Figure 14 It is a schematic assembly diagram of the vertical beam, the connection component and the side frame in the projection screen provided by the embodiment of the present utility model. Figure 15 It is a schematic diagram of the rotatability of the vertical beam in the projection screen provided by the embodiment of the present utility model.

[0132] As Figure 14 and Figure 15 shown, in some alternative embodiments, the screen frame 120 further includes at least one vertical beam 123, and the vertical beam 123 is supported in the middle of the screen frame 120.

[0133] The rotating connecting piece 131 passes through the vertical beam 123 and the second frame 122 to enable the vertical beam 123 to rotate relative to the second frame 122.

[0134] It should be noted that the purpose of setting the vertical beam 123 is to enhance the support stability of the screen frame 120. Considering portability for entering the household, the vertical beam 123 can be made foldable.

[0135] Specifically, the vertical beam 123 is rotatably arranged on the second frame 122 through the rotating connecting piece 131. When the vertical beam 123 is folded, the vertical beam 123 can be folded to the second frame 122, or can be hidden inside the second frame 122. When the vertical beam 123 is unfolded, the vertical beam 123 can be connected between two opposite second frames 122 to enhance the support strength.

[0136] In some embodiments, there are two vertical beams 123, and the two vertical beams 123 are located in the middle of the screen frame 120. One of the vertical beams 123 is rotatably arranged on the second side frame 122 in one side frame through a rotating connecting member 131, and the other vertical beam 123 is rotatably arranged on the second side frame 122 in the other side frame through a rotating connecting member 131. The two vertical beams 123 are arranged staggeredly so as to be folded onto different second side frames 122, making the structure more compact.

[0137] Figure 16 The figure is an assembly schematic diagram of the second side frame and the connecting component from the first perspective of the projection screen provided by the embodiment of the present utility model. Figure 17 The figure is an assembly schematic diagram of the second side frame and the connecting component from the second perspective of the projection screen provided by the embodiment of the present utility model. Figure 18 The figure is a cross-sectional view of the second side frame and the connecting component of the projection screen provided by the embodiment of the present utility model. Figure 19 The figure is a schematic diagram of the third state of the side frame of the projection screen provided by the embodiment of the present utility model. Figure 20 The figure is a schematic diagram of the fourth state of the side frame of the projection screen provided by the embodiment of the present utility model.

[0138] As Figures 16 to 20 shown, in some alternative embodiments, the second side frame 122 includes a first section 1221 and a second section 1222, and the rotating connecting member 131 is rotatably connected between the first section 1221 and the second section 1222 to enable the first section 1221 and the second section 1222 to rotate and fold.

[0139] It should be noted that the rotating connecting member 131 passes through the first section 1221 and the second section 1222 and can rotate relative to the first section 1221 and the second section 1222 respectively. The design of using the rotating connecting member 131 to replace the existing hinge structure can reduce the material cost required for folding while ensuring that the second side frame 122 can be folded to achieve the foldable effect of the screen frame 120.

[0140] In some alternative embodiments, the connecting component 130 further includes an adjusting member 132. The adjusting member 132 is located between the first section 1221 and the second section 1222 and is used to adjust the distance between the first section 1221 and the second section 1222;

[0141] Part of the rotating connecting member 131 is rotatably connected to the first end of the first section 1221 and the adjusting member 132 to enable the first section 1221 to rotate relative to the second section 1222, and the other part of the rotating connecting member 131 is rotatably connected to the second end of the second section 1222 and the adjusting member 132 to enable the second section 1222 to rotate relative to the first section 1221.

[0142] It should be noted that the purpose of setting the adjusting member 132 is to adjust the distance between the first section 1221 and the second section 1222, so seamless folding can be achieved. In essence, during assembly, telescopic movement is performed after unfolding to eliminate the folding gap between the first section 1221 and the second section 1222.

[0143] In some embodiments, the first end of the adjusting member 132 is located within the first section 1221, and the second end of the adjusting member 132 is located within the second section 1222. A rotating connecting member 131 connects the first section 1221 and the first end of the adjusting member 132 and can rotate within the first section 1221 and the first end of the adjusting member 132 to achieve the purpose of rotatably arranging the first section 1221 relative to the second section 1222; another rotating connecting member 131 connects the second section 1222 and the second end of the adjusting member 132 and can rotate within the second section 1222 and the second end of the adjusting member 132 to achieve the purpose of rotatably arranging the second section 1222 relative to the first section 1221, ultimately enabling the first section 1221 and the second section 1222 to be foldable.

[0144] In some alternative embodiments, at least one adjusting hole is formed in the adjusting member 132. The adjusting hole penetrates through the opposite sides of the adjusting member 132 along the width direction of the second frame 122, and the rotating connecting member 131 is movable within the adjusting hole.

[0145] A first rotating hole 12211 is formed in the first section 1221. Part of the rotating connecting member 131 passes through the first rotating hole 12211 and the adjusting hole and rotates within the first rotating hole 12211 and the adjusting hole.

[0146] A second rotating hole 12221 is formed in the second section 1222. Another part of the rotating connecting member 131 passes through the second rotating hole 12221 and part of the adjusting hole and rotates within the second rotating hole 12221 and the other part of the adjusting hole to fold the first section 1221 and the second section 1222.

[0147] It should be noted that the setting of the adjusting hole enables the rotating connecting member 131 to rotate within the adjusting hole and also move within the adjusting hole. After the second frame 122 is unfolded, telescopic movement is performed to eliminate the folding gap between the first section 1221 and the second section 1222, so as to achieve gapless folding and unfolding of the second frame 122 and further improve the support stability after unfolding and assembly.

[0148] In some embodiments, there are two first rotating holes 12211, and part of the adjusting member 132 is located within the first section 1221. One of the rotating connecting members 131 sequentially passes through one first rotating hole 12211, the adjusting hole, and the other first rotating hole 12211 to meet the rotatable setting requirement, and the adjusting member 132 and the first section 1221 can be connected through the rotating connecting member 131.

[0149] Correspondingly, there are two second rotation holes 12221, and another part of the adjusting member 132 is located in the second section 1222. Another rotation connecting member 131 sequentially passes through one second rotation hole 12221, the adjustment hole, and another second rotation hole 12221 to meet the rotatable setting, and the adjusting member 132 and the second section 1222 can be connected by the rotation connecting member 131.

[0150] In some alternative embodiments, at least one adjustment hole includes a first adjustment hole 1321 and a second adjustment hole 1322. The first adjustment hole 1321 and the second adjustment hole 1322 are spaced along the length direction of the adjusting member 132. The position of the first adjustment hole 1321 matches the position of the first section 1221, and the position of the second adjustment hole 1322 matches the position of the second section 1222.

[0151] Part of the rotation connecting member 131 rotates through the first rotation hole 12211 and the first adjustment hole 1321, and another part of the rotation connecting member 131 rotates through the second rotation hole 12221 and the second adjustment hole 1322.

[0152] It should be noted that with such a setting, specifically, the first adjustment hole 1321, the first rotation hole 12211 of the first section 1221, and a rotation connecting member 131 are matched with each other, and the second adjustment hole 1322, the second rotation hole 12221 of the second section 1222, and another rotation connecting member 131 are matched with each other, making the overall structure more compact.

[0153] In some embodiments, the structures of the first adjustment hole 1321 and the second adjustment hole 1322 are the same, which can further ensure that the moving stroke of a rotation connecting member 131 in the first adjustment hole 1321 is consistent with the moving stroke of another rotation connecting member 131 in the second adjustment hole 1322, so as to improve the effect of seamless folding of the second frame 122.

[0154] Continue to refer to Figures 16 to 18 , in some alternative embodiments, the first section 1221 has a first groove 12212, and the second section 1222 has a second groove 12222. The notch of the first groove 12212 is communicated with the notch of the second groove 12222 to form a receiving cavity, and the adjusting member 132 is located in the receiving cavity.

[0155] It should be noted that the setting of the receiving cavity formed by the first groove 12212 and the second groove 12222 can better accommodate the adjusting member 132, so that the adjusting member 132 can be hidden in the second frame 122, ensuring the smoothness of the structural operation while having a high appearance.

[0156] In some embodiments, the size of the receiving cavity is larger than that of the adjusting member 132 to allow the adjusting member 132 to rotate within the receiving cavity. That is to say, the receiving cavity has a space for the adjusting member 132 to rotate.

[0157] In some alternative embodiments, the adjusting hole is an oblong hole;

[0158] The adjusting hole extends along the length direction of the second side frame 122.

[0159] It should be noted that such a setting allows the first section 1221 to move towards the second section 1222, and at the same time, the second section 1222 to move towards the first section 1221. That is to say, the first section 1221 and the second section 1222 can move towards each other to reduce the gap between them after deployment and achieve zero-gap deployment.

[0160] In some alternative embodiments, the adjusting member 132 is a rotating block; and / or,

[0161] The length of the first section 1221 is longer than that of the second section 1222.

[0162] It should be noted that since the adjusting member 132 is a rotating block, it can be embedded within the second side frame 122.

[0163] Among them, the design where the length of the first section 1221 is longer than that of the second section 1222 can be understood as an unequal setting of the first section 1221 and the second section 1222, or an unequal folding of the first section 1221 and the second section 1222. The purpose of such a setting is to enhance the anti-bending deformation ability when the second side frame 122 is deployed; in addition, the second section 1222 can be folded into the first section 1221, enabling the second side frame 122 to be folded and compressed, reducing the occupied space.

[0164] Figure 21 This is an assembly schematic diagram of the first side frame and the second side frame in the projection screen provided by the embodiment of the present invention. Figure 22 This is an assembly schematic diagram of the vertical beam and the second side frame in the projection screen provided by the embodiment of the present invention. Figure 23 This is an assembly schematic diagram of the first section and the second section in the projection screen provided by the embodiment of the present invention.

[0165] Such as Figures 19 to 23As shown in the figure, it should be noted that the assembly process of the screen frame 120 is as follows: First, the assembly process of the frame screen frame 120 is the opposite of folding. The frame is flattened from the folded state in sequence. After the second side frame 122 is rotated and flattened, the two side frames need to be spliced. After splicing, 2 mounting screws 127 are fixed at each of the 4 corners, and a total of 8 mounting screws 127 are needed to be fixed at the corners. Among them, the angle iron structure at the corners has been pre-installed on the screen frame 120 through the mounting screws 127, and only 2 mounting screws 127 at the other end need to be fixed.

[0166] Then, 1 mounting screw 127 is fixed at each of the positions of the 2 vertical beams 123, and 2 mounting screws 127 are needed to complete the installation at the positions of the vertical beams 123. Since the other end of the vertical beam 123 is folded by means of the rotating connecting piece 131, only 1 mounting screw 127 needs to be tightened at the other end. After the folding gap is eliminated at the folding position of the second side frame 122, the lever 129 rotates, and then 2 mounting screws 127 are fixed at each of the 2 folding positions.

[0167] In summary, the screen frame 120 provided by the embodiment of the present invention only needs 14 mounting screws 127 to complete the assembly, and the number of mounting screws 127 is small. At the same time, it can be folded seamlessly, without other loose parts structures, and the assembly speed is fast.

[0168] Figure 24 It is a partial schematic view of the screen frame in the projection screen provided by the embodiment of the present invention. Figure 25 It is a partial cross-sectional view of the screen frame in the projection screen provided by the embodiment of the present invention. Figure 26 It is a schematic view of the first state assembly of the display film and the pull rod in the projection screen provided by the embodiment of the present invention. Figure 27 It is a schematic view of the second state assembly of the display film and the pull rod in the projection screen provided by the embodiment of the present invention.

[0169] In some alternative embodiments, the screen frame 120 further includes a pull rod 124, and the pull rod 124 is connected to the end of the display film 110.

[0170] It should be noted that since the area of the display film 110 is large, usually the pull rod 124 needs to be stretched to effectively expand the display film 110 into a flat state. When pulling the pull rod 124, it means pulling the entire display film 110, and the uniformity is higher.

[0171] In some embodiments, the synthetic cloth 112 has a cloth bag 1121. The pull rod 124 is passed through the cloth bag 1121 and then through the notch 125 to be installed into the side frame until the rod-passing is completed at the four corners of the display diaphragm 110. The display diaphragm 110 is preliminarily installed on the integrated screen frame 120 by means of the cloth bag 1121 and the pull rod 124. Since the screen frame 120 is placed on the ground, due to the gravity, the pull rod 124 and the cloth bag 1121 are both placed at the bottom of the screen frame 120.

[0172] Figure 28 Schematic diagram of the first state assembly of the display diaphragm and the fastening screw in the projection screen provided by the embodiment of the present invention Figure 29 Schematic diagram of the second state assembly of the display diaphragm and the fastening screw in the projection screen provided by the embodiment of the present invention Figure 30 Schematic diagram of the third state assembly of the display diaphragm and the fastening screw in the projection screen provided by the embodiment of the present invention

[0173] Specifically, as Figures 26 to 30 shown, the side of the screen frame 120 is designed with a deep groove structure and a countersunk hole is machined at the same time. The fastening screws 128 are used for fastening around the screen.

[0174] The perforated pull rod 124 is inserted into the synthetic cloth 112, and the hole positions of the synthetic cloth 112 correspond to those of the pull rod 124. At the same time, there are threaded holes at the corresponding positions on the screen frame 120. When the holes of the synthetic cloth 112, the pull rod 124 and the threaded holes of the screen frame 120 are aligned, the fastening screw 128 is installed on the screen frame 120. By designing the stroke size of the synthetic cloth 112, the display diaphragm 110 is continuously tightened. During the fastening process, the fastening screw 128 will contact the pull rod 124 and drive the pull rod 124 to move. Then the pull rod 124 drives the cloth bag 1121 to move, and then the display diaphragm 110 is tightened. Due to the specific design of the total length and total width dimensions of the synthetic cloth 112, the diaphragm is continuously tightened during the fastening process, and then the tensioning of the entire screen diaphragm is completed. Until the pull rod 124 is pushed into the designed rib position of the inner frame by the fastening screw 128, at this time the position of the pull rod 124 is completely fixed inside the screen, and then the tensioning process of the entire display diaphragm 110 is completed, and the stability is increased at the same time.

[0175] Figure 31 Explosion diagram between the notch and the plug block in the projection screen provided by the embodiment of the present invention Figure 32 Assembly diagram between the notch and the plug block in the projection screen provided by the embodiment of the present invention

[0176] As Figure 31 and Figure 32As shown, a notch 125 is formed on the side frame. The notch 125 is located at the connection of the first side frame 121 and the second side frame 122. The pull rod 124 passes through the notch 125 to be installed into the side frame.

[0177] In some alternative embodiments, the screen frame 120 further includes a blocking block 126, and the blocking block 126 blocks the notch 125.

[0178] It should be noted that due to the notch 125 being processed at the back corner of the screen, only 4 blocking blocks 126 need to be installed at the corner position to decorate the appearance of the corner position.

[0179] The projection screen provided by the embodiment of the present invention includes a display film, and the display film has a projection light-receiving surface; a screen frame, the screen frame includes two side frames, and the two side frames are connected to surround the outer periphery of the display film. The side frame includes a first side frame and a second side frame, the first side frame and the second side frame are rotatably connected, and the second side frame includes a first section and a second section; a connection component, including: a rotating connection member, the first section and the second section are respectively connected to the rotating connection member; an adjusting member, the adjusting member is located between the first section and the second section, the rotating connection member is rotatably arranged on the adjusting member and moves on the adjusting member so that the distance between the first section and the second section is variable.

[0180] Through the foldable design of the screen frame, the scattered projection screen is folded. On the one hand, it can reduce the entry volume of the screen, achieve convenient entry, reduce the transportation and / or entry volume, and solve the problem of large-size screen entry; on the other hand, when assembling the screen frame at the user's home, folding and fixing are simple. Instead of using the traditional hinge structure for folding, a rotating connection member is adopted, which is simpler and more ingenious, the cost is reduced, and the installation speed can be significantly improved; in addition, through the mutual cooperation of the adjusting member and the rotating connection member, the gap between the second side frames is reduced after assembly to improve the stability after assembly.

[0181] In addition, as Figures 6 to 32 shown, the embodiment of the present invention also provides a projection screen 100, including:

[0182] A display film 110;

[0183] An integrated side frame to surround the outer periphery of the display film 110. The integrated side frame includes a first side frame 121 and a second side frame 122, and the second side frame 122 includes a first section 1221 and a second section 1222;

[0184] An adjusting rotating member, the adjusting rotating member is rotatably arranged between the first section 1221 and the second section 1222 so that the distance between the first section 1221 and the second section 1222 is variable.

[0185] The projection screen provided by the embodiment of the present utility model folds the scattered projection screen through the foldable design of the screen frame. On the one hand, it can reduce the volume of the screen when entering the household, achieve convenient household entry, reduce the transportation and / or household entry volume, and solve the problem of large-size screen household entry; on the other hand, when assembling the screen frame at the user's home, the folding and fixing are simple. The traditional hinge structure for folding is removed, and a rotating connecting piece is adopted, which is simpler and more ingenious, and the cost is reduced, which can significantly improve the installation speed. In addition, through the mutual cooperation of the adjusting piece and the rotating connecting piece, the gap between the second frames is reduced after assembly to improve the stability after assembly.

[0186] In addition, the embodiment of the present utility model further provides a projection system, including a projection device and the above-mentioned projection screen 100, and the projection device is used to project a projection image onto the projection screen 100.

[0187] The projection system provided by this embodiment specifically includes a projection device and the projection screen 100 in the first embodiment above, and the projection device is used to project a projection image onto the display film 110 of the projection screen 100.

[0188] Among them, the specific structure, working principle and function of the projection screen 100 have been described in detail in the first embodiment above, and will not be elaborated here.

[0189] Specifically, in the projection system of this embodiment, the projection device can be various existing projectors, such as a laser projector, etc. The projection device can project a projection image onto the display film 110 of the projection screen 100, so that the display film 110 can display the projection image for people to watch.

[0190] The display film 110 in the projection screen 100 can be an optical screen, and the display film 110 can be an optical film mainly composed of a Fresnel lens layer. For example, the display film 110 can include a diffusion layer, a substrate layer and a Fresnel lens layer (or can also include a substrate layer, a diffusion layer and a Fresnel lens layer) stacked in sequence along the direction away from the projection screen 100; among them, the substrate layer is a transparent film layer. When displaying an image, the light beam emits from the projection screen 100, and when passing through the diffusion layer, the light is dispersed by the diffusion layer, and then is reflected on the surface of the Fresnel lens layer, so that the user can view the image.

[0191] Through the foldable design of the screen frame, the scattered projection screen is folded. On the one hand, it can reduce the volume of the screen when entering the household, achieve convenient household entry, reduce the transportation and / or household entry volume, and solve the problem of large-size screen household entry; on the other hand, when assembling the screen frame at the user's home, the folding and fixing are simple. The traditional hinge structure for folding is removed, and a rotating connecting piece is adopted, which is simpler and more ingenious, and the cost is reduced, which can significantly improve the installation speed.

[0192] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0193] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0194] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A projection screen (100), characterized in that, Comprising: A display diaphragm (110) having a projection light-receiving surface; A screen frame (120), the screen frame (120) comprising: A side frame surrounding the outer periphery of the display diaphragm (110), the side frame including a first side frame (121) and a second side frame (122), the first side frame (121) and the second side frame (122) being rotatably connected, and the second side frame (122) including a first section (1221) and a second section (1222); A connection assembly (130), including: A rotation connecting member (131), the first section (1221) and the second section (1222) being respectively connected to the rotation connecting member (131); An adjusting member (132), the adjusting member (132) being located between the first section (1221) and the second section (1222), the rotation connecting member (131) being rotatably provided on the adjusting member (132) and moving on the adjusting member (132) so that the distance between the first section (1221) and the second section (1222) is variable.

2. The projection screen (100) according to claim 1, characterized in that, The screen frame (120) has a flattened state and a folded state. When the screen frame (120) is switched from the folded state to the flattened state, the rotation connecting member (131) moves to a first position, driving the first section (1221) and the second section (1222) to move towards each other; When the screen frame (120) is switched from the flattened state to the folded state, the rotation connecting member (131) moves to a second position, driving the first section (1221) and the second section (1222) to move away from each other; Wherein, the first position is the middle of the adjusting member (132), and the second position is the end of the adjusting member (132).

3. The projection screen (100) according to claim 1, characterized in that, The first section (1221) has a first groove (12212), and the second section (1222) has a second groove (12222). The notch of the first groove (12212) communicates with the notch of the second groove (12222) to form an accommodation cavity, and the adjusting member (132) is located in the accommodation cavity.

4. The projection screen (100) according to any one of claims 1-3, characterized in that, At least one adjusting hole is formed in the adjusting member (132). The adjusting hole penetrates through opposite sides of the adjusting member (132) along the width direction of the second side frame (122), and the rotation connecting member (131) is movable in the adjusting hole; A first rotation hole (12211) is formed in the first section (1221). Part of the rotation connecting member (131) passes through the first rotation hole (12211) and the adjusting hole and rotates in the first rotation hole (12211) and the adjusting hole; A second rotation hole (12221) is formed in the second section (1222). Another part of the rotation connecting member (131) passes through the second rotation hole (12221) and part of the adjusting hole and rotates in the second rotation hole (12221) and the other part of the adjusting hole to fold the first section (1221) and the second section (1222).

5. The projection screen (100) according to claim 4, characterized in that, At least one of the adjustment holes includes a first adjustment hole (1321) and a second adjustment hole (1322). The first adjustment hole (1321) and the second adjustment hole (1322) are spaced along the length direction of the adjustment member (132). The position of the first adjustment hole (1321) matches the position of the first section (1221), and the position of the second adjustment hole (1322) matches the position of the second section (1222); A part of the rotating connection member (131) rotates through the first rotating hole (12211) and the first adjustment hole (1321), and another part of the rotating connection member (131) rotates through the second rotating hole (12221) and the second adjustment hole (1322).

6. The projection screen (100) according to claim 4, wherein The adjustment hole is an oblong hole; The adjustment hole extends along the length direction of the second frame (122).

7. The projection screen (100) according to any one of claims 1-3, characterized in that, Both the first frame (121) and the second frame (122) are integrally formed structures; The screen frame (120) further includes a pull rod (124), and the pull rod (124) connects to the end of the display diaphragm (110); A notch (125) is formed on the side frame, and the notch (125) is located at the connection of the first frame (121) and the second frame (122). The pull rod (124) passes through the notch (125) to be installed into the side frame.

8. The projection screen (100) according to claim 7, wherein, The screen frame (120) further includes a plug block (126), and the plug block (126) seals the notch (125).

9. The projection screen (100) according to any one of claims 1-3, characterized in that, The rotating connection member (131) is a pin shaft; A first connection hole (1211) is formed on the first frame (121), and a second connection hole (1223) is formed on the second frame (122). The rotating connection member (131) passes through the first connection hole (1211) and the second connection hole (1223) to enable the first frame (121) to rotate relative to the second frame (122).

10. A projection system, characterized in that, It includes a projection device and the projection screen (100) according to any one of claims 1-9. The projection device is configured to project a projection image onto the projection screen (100).

Images