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 a plurality of borders which are connected with one another and surround the periphery of the display diaphragm; the pre-installation assembly is movably arranged on the screen frame, the pre-installation assembly comprises a telescopic part, the abutting end of the telescopic part abuts against the first end of the screen frame, and the connecting end of the telescopic part is located at the second end of the screen frame and connected with the end of the display diaphragm; the telescopic piece has the telescopic amount of moving relative to the first end of the screen frame, and when the abutting end of the telescopic piece is configured to move away from the second end of the screen frame, the display diaphragm is in a stretched state. The device is convenient for a user to install by himself.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection technology, in particular to a projection screen and a projection system. BACKGROUND

[0002] With the improvement of living standards, people's pursuit is also changing. For laser televisions, large size and light weight of the screen have become a pursuit index for people.

[0003] In the process of conceiving and implementing the present application, the applicant found that at least the following problems exist: The laser television frame screen on the market is composed of aluminum profile frames (inner frame, outer frame and vertical beam), frame connecting pieces, film pieces, film piece support rods, springs or draw pins. For large size frame screens, due to the large size, the parts are delivered to the house, and after delivery, the maintenance personnel need to assemble one by one. The types and quantities of structural parts are large, the types and quantities of frame connecting pieces are large, and many fastening screws need to be installed, which is not convenient for assembly.

[0004] The foregoing narrative is to provide general background information and does not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the present application is to provide a projection screen and a projection system, which is convenient for users to install by themselves.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present application provides a projection screen, comprising:

[0007] a display film piece having a projection light receiving surface;

[0008] a screen frame comprising:

[0009] a plurality of frames connected and surrounding the outer periphery of the display film piece;

[0010] a pre-installation assembly movably arranged on the screen frame, the pre-installation assembly comprising:

[0011] a telescopic piece, the abutting end of the telescopic piece abutting the first end of the screen frame, the connecting end of the telescopic piece being located at the second end of the screen frame and connecting the end portion of the display film piece;

[0012] The telescopic piece has a telescopic amount of movement relative to the first end of the screen frame, and when the abutting end of the telescopic piece is configured to move away from the second end of the screen frame, the display film piece is in a stretched state.

[0013] The beneficial effects of the present application are: by arranging the telescopic piece, the telescopic piece needs to be pre-installed on the screen frame and abuts against the end of the display diaphragm, after leaving the factory, the telescopic piece has the characteristics of a certain telescopic amount, the user can push or pull in a mode, so that the telescopic piece is movable, in the process of moving the telescopic piece, the display diaphragm can be stretched, the installation of the diaphragm is completed, the installation difficulty is greatly reduced, the installation time is saved, the product cost is reduced, the large-size screen spare part is installed at home, and the user can install it by himself.

[0014] On the basis of the above technical solutions, the present application can also be improved as follows.

[0015] In some embodiments, the moving direction of the telescopic piece matches the stretching direction of the display diaphragm.

[0016] The above technical solutions have the following advantages or beneficial effects: since the moving direction of the telescopic piece matches the stretching direction of the display diaphragm, the energy transmission efficiency is higher, the tension is applied more directly and effectively, the matching moving direction helps to maintain the mechanical stability of the system, the matching ensures that the display diaphragm is uniformly stressed during stretching, and the risk of diaphragm damage is reduced.

[0017] In some embodiments, the frame has a moving groove extending along the width direction of the frame.

[0018] The telescopic piece is located in the moving groove and moves in the moving groove.

[0019] The above technical solutions have the following advantages or beneficial effects: the telescopic piece can move in the moving groove, and by adjusting the position of the telescopic piece, the use space of the frame can be optimized, sufficient structural stability can be provided after adjustment, and the safety and reliability of the frame in use are ensured.

[0020] In some embodiments, the screen frame further comprises a support rod connected to the end of the display diaphragm, and the telescopic piece abuts between the support rod and the frame.

[0021] The above technical solutions have the following advantages or beneficial effects: the support rod is connected to the end of the display diaphragm and abuts between the frame through the telescopic piece, when the telescopic piece moves, the support rod can be pushed to move outward to make the display diaphragm in a tensioned state; the installation and maintenance of the screen frame are more simple. By adjusting the telescopic piece, the installation, disassembly or replacement of the display diaphragm can be quickly realized.

[0022] In some embodiments, one of the support rod and the display diaphragm has a positioning block, the other of the support rod and the display diaphragm has a positioning hole, the positioning block and the positioning hole are matched in structure, and the positioning block is inserted into the positioning hole to connect the support rod and the display diaphragm.

[0023] The technical scheme has the advantages or beneficial effects that the cooperation of the positioning block and the positioning hole can ensure the accurate positioning between the support rod and the display film, help to maintain the flatness and correct installation position of the display film, and ensure the best state of the display effect.

[0024] In some embodiments, the pre-installation assembly further comprises a tensioning member connected between the frame and the support rod.

[0025] The tensioning member has a switchable installation state and a disengagement state relative to the screen frame, and when the tensioning member is switched from the disengagement state to the installation state, the tensioning member provides a tensioning force for the telescopic member.

[0026] When the tensioning member is switched from the installation state to the disengagement state, the telescopic member is configured to be disengaged from the tensioning force and move in the direction of the display film to make the display film in a stretched state.

[0027] The technical scheme has the advantages or beneficial effects that by using the combination of the telescopic member and the tensioning member, the assembly can automatically adjust the tension of the display film without complex manual adjustment, the assembly can automatically adapt and maintain the tension of the display film, and the installation process becomes more convenient. Under the action of the tensioning member, the display film can maintain a flat and uniform tension, thereby reducing the possibility of uneven display or image distortion. In this way, the overall display quality can be improved to provide a better user experience.

[0028] In some embodiments, the support rod has a positioning block, the positioning block is located outside the frame when the tensioning member is switched from the disengagement state to the installation state, and the positioning block is located inside the frame when the tensioning member is switched from the installation state to the disengagement state.

[0029] The technical scheme has the advantages or beneficial effects that by changing the state of the tensioning member, the position of the positioning block can be dynamically adjusted, and after the installation of the display film is completed, the positioning block can be hidden inside the frame.

[0030] In some embodiments, the telescopic member is a compression spring, and the tensioning member is a screw.

[0031] When the tensioning member is switched from the disengagement state to the installation state, the tensioning member drives the support rod to move in the direction facing the display film and press the compression spring to make the compression spring in a compressed state.

[0032] When the tensioning member is switched from the installation state to the disengagement state, the compression spring is disengaged from the tensioning force to push the support rod to move in the direction away from the display film.

[0033] The use of the compression spring allows the support rod to automatically adjust the position when the tensioning piece changes from the installation state to the disengagement state. The spring force can automatically push the support rod back to the initial position to realize the automatic reset function. The user can control the position of the support rod by simply changing the state of the tensioning piece, without manually adjusting the support rod. This design simplifies the operation steps and improves the user experience.

[0034] In some embodiments, the telescopic piece is a cam structure, the cam structure has a central axis, a first abutting surface, and a second abutting surface, the second abutting surface is away from the central axis relative to the first abutting surface;

[0035] The pre-installation assembly further includes a rotating piece, the rotating piece is arranged on the cam structure, the rotating piece rotates relative to the screen frame and has a first position and a second position;

[0036] When the rotating piece rotates to the first position, the support rod abuts against the first abutting surface; when the rotating piece rotates to the second position, the support rod abuts against the second abutting surface.

[0037] The cam structure allows precise control of the position of the support rod by rotation. The cam structure can provide mechanical advantage by designing different abutting surface angles, making the required force smaller when switching states, and more labor-saving in operation; the different positions of the first abutting surface and the second abutting surface can provide two stable states, ensuring that the support rod can remain stable in each state.

[0038] In a second aspect, the application also provides a projection system, including a projection device and the projection screen described above, the projection device is used to project a projection picture to the projection screen.

[0039] By setting the telescopic piece, the telescopic piece needs to be pre-installed on the screen frame and abut against the end of the display film. After leaving the factory, the telescopic piece has the characteristics of a certain telescopic amount. During the movement of the telescopic piece, the display film can be stretched, the installation of the film can be completed, the installation difficulty can be greatly reduced, the installation time can be saved, the product cost can be reduced, the large-size screen can be delivered to the user's home, and the user can install it by himself. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0041] Figure 1A structural schematic view of a projection screen provided by an embodiment of the present application;

[0042] Figure 2 A structural schematic view of a projection screen provided by an embodiment of the present application; Figure 1 A partial enlarged view of I in the middle;

[0043] Figure 3 A structural schematic view of a screen frame in a projection screen provided by an embodiment of the present application;

[0044] Figure 4 A structural schematic view of a projection screen provided by an embodiment of the present application; Figure 3 A partial enlarged view of II in the middle;

[0045] Figure 5 An assembly schematic view of a long side frame and a pre-installation assembly in a projection screen provided by an embodiment of the present application;

[0046] Figure 6 A sectional view of the assembly of a long side frame and a pre-installation assembly in a projection screen provided by an embodiment of the present application;

[0047] Figure 7 A structural schematic view of a projection screen provided by an embodiment of the present application; Figure 6 A partial enlarged view of III in the middle;

[0048] Figure 8 An assembly schematic view of a short side frame and a pre-installation assembly in a projection screen provided by an embodiment of the present application;

[0049] Figure 9 A structural schematic view of a projection screen provided by an embodiment of the present application; Figure 8 A partial enlarged view of IV in the middle;

[0050] Figure 10 A sectional view of the assembly of a short side frame and a pre-installation assembly in a projection screen provided by an embodiment of the present application;

[0051] Figure 11 A structural schematic view of another pre-installation assembly in a projection screen provided by an embodiment of the present application;

[0052] Figure 12 An assembly schematic view of a screen frame and a pre-installation assembly in a projection screen provided by an embodiment of the present application before tensioning of a display film;

[0053] Figure 13 A structural schematic view of a projection screen provided by an embodiment of the present application; Figure 12 A partial enlarged view of V in the middle;

[0054] Figure 14 An assembly schematic view of a screen frame and a pre-installation assembly in a projection screen provided by an embodiment of the present application after tensioning of a display film;

[0055] Figure 15 A structural schematic view of a projection screen provided by an embodiment of the present application; Figure 14 A partial enlarged view of VI in the middle.

[0056] BRIEF DESCRIPTION OF DRAWINGS

[0057] 100 - projection screen;

[0058] 110 - display film;

[0059] 120 - screen frame; 121 - long side frame; 122 - short side frame; 123 - moving slot; 124 - support rod;

[0060] 130 - pre-installation assembly; 131 - telescopic piece; 1311 - first abutting surface; 1312 - second abutting surface; 132 - tensioning piece; 133 - rotating piece. DETAILED DESCRIPTION

[0061] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. All other embodiments obtained fall within the scope of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0062] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0063] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0064] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like 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 application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0065] At present, during the conception and implementation of the present application, the applicant finds that at least the following problems exist: The laser television frame screen on the market at present is composed of aluminum profile frames (inner frame, outer frame and vertical beam), frame connecting pieces, diaphragm, diaphragm support rod, spring or draw pin. For large size frame type screen, due to the large size, the scattered parts are delivered to the house, after delivery to the house, the maintenance workers need to assemble one by one, the types and quantities of structural parts are large, the types and quantities of frame connecting pieces are large, the number of fastening screws to be installed is large, and the assembly is inconvenient.

[0066] In order to overcome the defects in the prior art, the projection screen and the projection system provided by the present application, by the setting of the telescopic piece, the telescopic piece needs to be pre-installed on the screen frame and abut against the end of the display diaphragm, after delivery, by the telescopic amount of the telescopic piece, the display diaphragm can be stretched during the movement of the telescopic piece, that is, the installation of the diaphragm can be completed, which can greatly reduce the installation difficulty, save the installation time, reduce the product cost, and facilitate the user to install the large size screen scattered parts.

[0067] The content of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly and specifically understand the content of the present application.

[0068] Figure 1 The structure diagram of the projection screen provided by the embodiment of the present application is shown in Figure 2 The structure diagram of the projection screen provided by the embodiment of the present application is shown in Figure 1 The enlarged view of the part I in the middle, Figure 3 The structure diagram of the screen frame in the projection screen provided by the embodiment of the present application is shown in Figure 4 The structure diagram of the screen frame in the projection screen provided by the embodiment of the present application is shown in Figure 3 The enlarged view of the part II in the middle.

[0069] As shown in Figures 1 to 4 The present application provides a projection screen 100, which comprises:

[0070] A display diaphragm 110 having a projection light receiving surface;

[0071] The screen frame 120 comprises:

[0072] A plurality of borders connected and surrounding the outer periphery of the display film 110;

[0073] A pre-installation assembly 130 movably arranged on the screen frame 120, the pre-installation assembly 130 comprising:

[0074] A telescopic piece 131, the abutting end of the telescopic piece 131 abutting the first end of the screen frame 120, the connecting end of the telescopic piece 131 located at the second end of the screen frame 120 and connecting the end of the display film 110;

[0075] The telescopic piece 131 has a telescopic amount of movement relative to the first end of the screen frame 120, when the abutting end of the telescopic piece 131 is configured to move away from the second end of the screen frame 120, so that the display film 110 is in a stretched state.

[0076] Through the above arrangement, that is, the projection screen 100 of the embodiment of the present application, through the arrangement of the telescopic piece 131, the telescopic piece 131 needs to be pre-installed on the screen frame 120 and abut the end of the display film 110, after leaving the factory, by using the telescopic amount of the telescopic piece 131, in the process of movement of the telescopic piece 131, the display film 110 can be stretched, that is, the installation of the film can be completed, which can greatly reduce the installation difficulty, save the installation time, and reduce the product cost. It is convenient for users to install the large-size screen assembly into the house.

[0077] It should be noted that the following specific structures are described.

[0078] [Display film 110]

[0079] It can be understood that the front surface of the display film 110 is the projection light receiving surface.

[0080] It should be noted that the display film 110 can generally be composed of a hard layer, a Fresnel structure layer, and a projection layer, etc., and has a certain strength and rigidity, and can have a certain verticality in the vertical free sag state, so that the display film 110 appears flat. However, due to its softness, the display film 110 still cannot meet the flatness requirement for display without support or external interference, and the uneven screen will cause the laser projection picture to be distorted, blurred, uneven in brightness, or other degradation problems.

[0081] In order to achieve flatness of the display film 110, in some optional embodiments, the display film 110 comprises a film body and a synthetic cloth that are attached to each other.

[0082] Generally, the diaphragm body is a hard straight material, and the synthetic cloth generally has the characteristics of no elasticity, ultra-thin, dense and high strength, so that when the synthetic cloth and the diaphragm body are bonded, an integrated structure can be formed between the two, thereby facilitating force transmission and enabling the diaphragm body to stretch following the deformation of the synthetic cloth.

[0083] Specifically, the synthetic cloth can be a soft cloth. In this way, the synthetic cloth can better transmit the force when stretched, and has stable properties and can adapt to a wide range of environments, such as maintaining good flatness and reliability between an ambient temperature of -10°C and 40°C.

[0084] [Screen frame 120]

[0085] 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 accommodate the display diaphragm 110, and the screen frame 120 can be wrapped around the edge of the display diaphragm 110 to provide protection for the display diaphragm 110, and the screen frame 120 and the display diaphragm 110 are connected and tensioned by a deformable or displacement tensioning module.

[0086] It should be noted that the screen frame 120 can include long side frames 121 and short side frames 122, and the long side frames 121 and the short side frames 122 are both two, one long side frame 121, one short side frame 122, another long side frame 121 and another short side frame 122 are connected in sequence to form a hollow area.

[0087] In some examples, the screen frame 120 can be a metal piece, and the material thereof can include one or more of copper, iron, aluminum, tin, and lead.

[0088] In other examples, the screen frame 120 can be made of plastic material.

[0089] It should be noted that the material of the screen frame 120 is not limited herein.

[0090] Of course, during production and manufacturing, the screen frame 120 can also be made of steel plate, plastic or synthetic material under the premise of ensuring strength.

[0091] 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 outer frame in the existing structure, the side frame of the present application is designed as an integrated structure of the inner and outer frames, which eliminates the process of assembling the inner frame first and then assembling the outer frame, reduces the assembly and disassembly process, and further improves the work efficiency.

[0092] In some examples, the frame includes an inner frame segment and an outer frame segment, the inner frame segment and the outer frame segment being integrally connected, wherein the outer frame segment wraps at least part of the inner frame segment.

[0093] It should be noted that the inner frame segment and the outer frame segment are integrally connected, which is fast in assembly speed and less in material quantity, can realize small volume packaging, convenient transportation and household entry, and the frame has high integration degree and fast assembly speed, is simple and reliable, and has low cost.

[0094] Specifically, the inner and outer integrated frame reduces the volume of packaging and household entry by folding, and the display film 110 is in a curled form, thereby reducing the volume of household entry and transportation by reducing the volume of the two parts.

[0095] In some examples, the outer frame segment surrounds the outer periphery of the inner frame segment, and the inner frame segment and the outer frame segment are made of the same material.

[0096] Regarding the integrally connected inner frame segment and outer frame segment, it can be understood that before leaving the factory, the two can be connected into an integrated structure by welding or other connecting members, and after folding and curling of the display film 110, household entry is performed, and assembly is performed, and when assembled at the user's home, only the frame is assembled from the folded state to the unfolded state, and the two unfolded frame assemblies are assembled, without the need to assemble the inner frame first and then the outer frame, and the overall assembly process is less.

[0097] [Pre-installation assembly 130]

[0098] Figure 5 The long frame in the projection screen provided by the embodiment of the present application is assembled with a pre-installation assembly, Figure 6 The long frame in the projection screen provided by the embodiment of the present application is assembled with a pre-installation assembly, Figure 7 is Figure 6 is a partial enlarged view of III in the middle, Figure 8 The short frame in the projection screen provided by the embodiment of the present application is assembled with a pre-installation assembly, Figure 9 is Figure 8 is a partial enlarged view of IV in the middle, Figure 10 The short frame in the projection screen provided by the embodiment of the present application is assembled with a pre-installation assembly.

[0099] As Figures 5 to 10 shown, it should be noted that by using the telescopic member 131, the tension of the display film 110 can be automatically adjusted without complex manual adjustment, and the assembly can automatically adapt and maintain the tension of the display film 110, and the installation process becomes more convenient. The telescopic member 131 has a certain telescopic amount, and during movement,

[0100] The display film 110 can maintain a flat and uniform tension, thereby reducing the possibility of display unevenness or image distortion. This can improve the overall display quality and provide a better user experience.

[0101] It should be noted that the abutting end of the telescopic member 131 and the connecting end of the telescopic member 131 are arranged along the length direction of the telescopic member 131.

[0102] As shown in the drawings, in some embodiments, the moving direction of the telescopic member 131 matches the stretching direction of the display film 110. Figures 5 to 10

[0103] The above technical solution has the following advantages or beneficial effects: since the moving direction of the telescopic member 131 matches the stretching direction of the display film 110, the energy transmission efficiency is higher, the tension is applied more directly and effectively, and the matched moving direction helps to maintain the mechanical stability of the system. This matching ensures that the display film 110 is uniformly stressed during stretching, reducing local stress concentration and thus reducing the risk of film damage.

[0104] In addition, through the precise matching of the moving direction, the display film 110 can maintain a more flat surface. This flatness helps to reduce optical distortion and display unevenness, thereby improving display accuracy and picture quality.

[0105] As shown in the drawings, in some embodiments, the long side frame 121 and the short side frame 122 each have a moving slot 123 extending along the width direction of the frame. Figures 5 to 10

[0106] The telescopic member 131 is located in the moving slot 123 and moves within the moving slot 123.

[0107] The above technical solution has the following advantages or beneficial effects: the telescopic member 131 can move within the moving slot 123, and by adjusting the position of the telescopic member 131, the use space of the frame can be optimized, sufficient structural stability can be provided after adjustment, and the safety and reliability of the frame in use can be ensured.

[0108] Specifically, the arrangement of the moving slot 123 can hide the telescopic member 131, which has good appearance, and can ensure the moving stroke of the telescopic member 131, which has high stability.

[0109] In some embodiments, the screen frame 120 further comprises a support rod 124 connected to the end of the display film 110, and the telescopic member 131 abuts between the support rod 124 and the frame.

[0110] ​​The technical scheme has the following advantages or beneficial effects: the support rod 124 is connected to the end of the display film 110 and abuts against the frame through the telescopic piece 131, when the telescopic piece 131 moves, the support rod 124 can be pushed to move outward, so that the display film 110 is in a tension state; the installation and maintenance of the screen frame 120 are more simple. By adjusting the telescopic piece 131, the installation, disassembly or replacement of the display film 110 can be quickly realized.

[0111] In addition, the support rod 124 and the telescopic piece 131 can be hidden inside the frame or integrated with the frame, providing an elegant and neat appearance, which is suitable for application scenarios requiring high visual standards.

[0112] It should be noted that, since the area of the display film 110 is large, the support rod 124 usually needs to be stretched to effectively expand the display film 110 to a flat state, so that when the support rod 124 is pulled, the entire display film 110 is pulled, and the uniformity is higher.

[0113] In some embodiments, the synthetic cloth has a cloth bag, the support rod 124 is inserted into the cloth bag to be installed into the frame, until the rod insertion is completed at the four corners of the display film 110, and the display film 110 is preliminarily installed on the integrated screen frame 120 by means of the cloth bag and the support rod 124. Since the screen frame 120 is placed on the ground, under the action of gravity, the support rod 124 and the cloth bag are placed at the bottom of the screen frame 120.

[0114] In some embodiments, one of the support rod 124 and the display film 110 has a positioning block, and the other has a positioning hole, the positioning block and the positioning hole are matched with each other, and the positioning block is inserted into the positioning hole to connect the support rod 124 and the display film 110.

[0115] The technical scheme has the following advantages or beneficial effects: the cooperation of the positioning block and the positioning hole can ensure the accurate positioning between the support rod 124 and the display film 110, which helps to maintain the flatness and correct installation position of the display film 110, and ensures the best state of the display effect.

[0116] By using the matched positioning structure, the error that may occur during installation can be reduced, and the consistency and reliability of each installation can be ensured. In addition, the positioning block inserted into the positioning hole provides a stable mechanical connection mode, reduces the relative movement between the support rod 124 and the display film 110, and thus improves the stability of the entire structure.

[0117] In some embodiments, the support rod 124 has the positioning block, and the display film 110 has the positioning hole, and the shapes and sizes of the two are matched with each other.

[0118] Of course, the display film 110 has a positioning block, and the support rod 124 has a positioning hole.

[0119] Specifically, the hole support rod 124 is inserted into the synthetic cloth, and the synthetic cloth corresponds to the hole position of the support rod 124. At the same time, the corresponding position on the screen frame 120 has a threaded hole. The tensioning piece 132 pre-tensions the support rod 124 when it is shipped, so that the positioning block and the positioning hole are aligned.

[0120] It should be noted that when the display film 110 is installed, the tensioning piece 132 is loosened, and the support rod 124 is pushed outward to a predetermined position under the action of the telescopic piece 131. When the support rod 124 moves outward, the purpose of tensioning the display film 110 is achieved. During the tightening process, the telescopic piece 131 directly contacts the support rod 124, pushing the support rod 124 to move, and then the support rod 124 moves the cloth bag, thereby tensioning the display film 110. Because the total length and total width of the synthetic cloth are specifically designed, the display film 110 is continuously tensioned during the tightening process, thereby completing the tensioning of the entire display film 110. Until the support rod 124 is pushed into the predetermined position by the telescopic piece 131, the display film 110 enters the shading range of the bezel shading, realizing the bezel integration design, and thereby the tensioning process of the entire display film 110 is completed, and the stability is increased.

[0121] In some embodiments, the pre-installation assembly 130 further comprises a tensioning piece 132 connected between the bezel and the support rod 124.

[0122] The tensioning piece 132 has a switchable installation state and a disengaged state relative to the screen frame 120. When the tensioning piece 132 is switched from the disengaged state to the installed state, the tensioning piece 132 provides a tensioning force for the telescopic piece 131.

[0123] When the tensioning piece 132 is switched from the installed state to the disengaged state, the telescopic piece 131 is configured to be disengaged from the tensioning force and move in the direction of the display film 110 to make the display film 110 in a tensioned state.

[0124] The above technical solution has the following advantages or beneficial effects: by using the combination of the telescopic piece 131 and the tensioning piece 132, the assembly can automatically adjust the tension of the display film 110 without complex manual adjustment. The assembly can automatically adapt and maintain the tension of the display film 110, and the installation process becomes more convenient. Under the action of the tensioning piece 132, the display film 110 can maintain a flat and uniform tension, thereby reducing the possibility of uneven display or image distortion. This can improve the overall display quality and provide a better user experience.

[0125] Specifically, the tensioning member 132 and the telescopic member 131 are pre-installed on the screen frame 120. After leaving the factory, the user only needs to loosen the tensioning member 132, and use the telescopic property of the telescopic member 131. After loosening the tensioning member 132, the display film 110 is stretched during the movement of the telescopic member 131, so that the installation of the film is completed.

[0126] In some embodiments, the support rod 124 has a positioning block. When the tensioning member 132 is switched from the disengaged state to the installed state, the positioning block is located outside the frame. When the tensioning member 132 is switched from the installed state to the disengaged state, the positioning block is located inside the frame.

[0127] The above technical solution has the following advantages or beneficial effects: by changing the state of the tensioning member 132, the position of the positioning block can be dynamically adjusted, and after the installation of the display film 110 is completed, the positioning block can be hidden inside the frame.

[0128] When the positioning block is located outside the frame, it may be easier to perform installation or disassembly operations. The user can prepare for installation when the tensioning member 132 is switched from the disengaged state to the installed state, and then lock the positioning block inside the frame when the tensioning member 132 is switched from the installed state to the disengaged state, thereby completing a stable installation. When the tensioning member 132 is switched from the installed state to the disengaged state, the positioning block is located inside the frame, which can provide additional support and stability, ensuring that the display film 110 remains flat and fixed during use.

[0129] As shown in FIG. 1, Figures 5 to 10 In some embodiments, the telescopic member 131 is a compression spring, and the tensioning member 132 is a screw;

[0130] When the tensioning member 132 is switched from the disengaged state to the installed state, the tensioning member 132 drives the support rod 124 to move in a direction facing the display film 110, and presses against the compression spring to make the compression spring in a compressed state;

[0131] When the tensioning member 132 is switched from the installed state to the disengaged state, the compression spring is released from the tensioning force to push the support rod 124 to move in a direction away from the display film 110.

[0132] The above technical solution has the following advantages or beneficial effects: the use of the compression spring allows the support rod 124 to automatically adjust the position when the state of the tensioning member 132 changes. When the tensioning member 132 is switched from the installed state to the disengaged state, the elastic force of the spring can automatically push the support rod 124 back to the initial position, realizing the automatic reset function. The user can control the position of the support rod 124 by simply changing the state of the tensioning member 132, without the need for manual adjustment of the support rod 124. This design simplifies the operation steps and improves the user experience.

[0133] It should be noted that when the tensioning member 132 switches from the disengaged state to the installed state, the tensioning member 132 compresses the compression spring. When the tensioning member 132 switches from the installed state to the disengaged state, that is, the user can loosen the tensioning member 132, the compression spring at this time pushes the support rod 124 to move without the pressure of the tensioning member 132, which can provide stable tension for the display film 110, ensuring its flatness and display effect. Due to the automatic reset function of the spring, the installation and removal process may be faster and more efficient, which is convenient for users to install at home.

[0134] It should be noted that the tensioning member 132 in the present application is switched from a disengaged state to an installed state. The manufacturer can pre-install the tensioning member 132 on the screen frame 120 before leaving the factory. When it is taken to the user's home, the user only needs to loosen the tensioning member 132. The compression spring pushes the support rod 124 outward under its own elastic force to stretch out the display film 110. At this time, the tensioning member 132 is switched from the installed state to the disengaged state, which can be the state of loosening the tensioning member 132.

[0135] In some embodiments, the tensioning member 132 may be a bolt.

[0136] Figure 11 This is a schematic diagram of the structure of another pre-installed component in the projection screen provided in an embodiment of the present application. Figure 12 This is a schematic diagram of the assembly of a screen frame and a pre-installed component in a projection screen provided by an embodiment of the present application before the display diaphragm is tensioned. Figure 13 for Figure 12 A partial enlarged view of the V in the middle. Figure 14 This is a schematic diagram of the assembly of a screen frame and a pre-installed component in a projection screen provided by an embodiment of the present application after the display diaphragm is tensioned. Figure 15 for Figure 14 A partial enlarged view of point VI in the middle.

[0137] like Figures 11 to 15 As shown, in some embodiments, the telescopic member 131 is a cam structure having a central axis, a first abutting surface 1311 and a second abutting surface 1312 , wherein the second abutting surface 1312 is farther away from the central axis than the first abutting surface 1311 ;

[0138] The pre-installation assembly 130 further includes a rotating member 133 , which is disposed on the cam structure. The rotating member 133 rotates relative to the screen frame 120 and has a first position and a second position.

[0139] When the rotating member 133 rotates to the first position, the support rod 124 abuts against the first abutting surface 1311 ; when the rotating member 133 rotates to the second position, the support rod 124 abuts against the second abutting surface 1312 .

[0140] The cam structure allows precise control of the position of the support rod 124 through rotation. The cam structure can provide mechanical advantages by designing different abutment surface angles, making the required force smaller when switching states, and making the operation more labor-saving; different positions of the first abutment surface 1311 and the second abutment surface 1312 can provide two stable states, ensuring that the support rod 124 can remain stable in each state.

[0141] It should be noted that when pre-installed, the rotating member 133 is rotated to the first position, and the support rod 124 abuts against the first abutment surface 1311. After leaving the factory, the rotating member 133 is rotated to make the cam structure rotate along the central axis. During rotation, the support rod 124 is switched from abutting against the first abutment surface 1311 to the second abutment surface 1312. Since the second abutment surface 1312 is farther away from the central axis than the first abutment surface 1311, the rotation of the cam structure can be used to push the support rod 124 to move outward. Due to the mechanical properties of the cam structure, the friction and wear during switching may be smaller, thereby reducing maintenance requirements and prolonging the service life of the equipment.

[0142] The user only needs to change the rotation position of the rotating member 133 to trigger the rotation of the cam and realize the conversion of the position of the support rod 124. This design simplifies the operation steps and improves the user experience.

[0143] With reference to the above Figures 11 to 15 In some embodiments, the second abutment surface 1312 is an arc surface; and / or,

[0144] The first abutment surface 1311 is a smooth surface.

[0145] The above technical solutions have the following advantages or beneficial effects: the arc surface can provide smooth transition, and can reduce impact and wear when the support rod 124 moves from the first abutment surface 1311 to the second abutment surface 1312. The smooth surface generally provides more stable contact, is suitable for positions that need to be fixed or stabilized, reduces friction, and makes it easier for the support rod 124 to move or adjust when in contact.

[0146] The projection screen provided by the present application comprises a display diaphragm having a projection light receiving surface; a screen frame comprising a plurality of frames connected and surrounding the outer periphery of the display diaphragm; and a pre-installation assembly movably arranged on the screen frame, the pre-installation assembly comprising a telescopic member, the abutting end of the telescopic member abutting against the first end of the screen frame, and the connecting end of the telescopic member being located at the second end of the screen frame and connecting the end portion of the display diaphragm; the telescopic member has a telescopic amount relative to the first end of the screen frame, and when the abutting end of the telescopic member is configured to move away from the second end of the screen frame, the display diaphragm is in a stretched state.

[0147] By setting the telescopic piece, the telescopic piece needs to be pre-installed on the screen frame and abuts against the end of the display film. After leaving the factory, the telescopic piece has the characteristics of a certain telescopic amount. During the movement of the telescopic piece, the display film can be stretched, the installation of the film can be completed, the installation difficulty can be greatly reduced, the installation time can be saved, the product cost can be reduced, the large-size screen spare part can be brought into the house, and the user can install it by himself.

[0148] In addition, the projection screen 100 provided by the embodiment of the application also includes a display film 110, a screen frame 120 surrounding the outer periphery of the display film 110, and a telescopic piece 131 located between the end of the display film 110 and the end of the screen frame 120 and moving relative to the screen frame 120 to make the display film 110 in a stretched state.

[0149] In addition, the projection system provided by the embodiment of the application includes a projection device and the projection screen 100 described above, and the projection device is used to project a projection picture to the projection screen 100.

[0150] The projection system provided by the embodiment includes the projection device and the projection screen 100 in the first embodiment, and the projection device is used to project a projection picture to the display film 110 of the projection screen 100.

[0151] The specific structure, working principle and function of the projection screen 100 have been described in detail in the first embodiment, and will not be described here.

[0152] Specifically, in the projection system of the embodiment, the projection device can be various existing projectors, such as a laser projector. The projection device can project a projection picture to the display film 110 of the projection screen 100, so that the display film 110 can display the projection picture for people to watch.

[0153] The display film 110 in the projection screen 100 can be an optical screen. The display film 110 can be an optical film mainly including a Fresnel lens layer. For example, the display film 110 can include a diffusion layer, a substrate layer and a Fresnel lens layer (or a substrate layer, a diffusion layer and a Fresnel lens layer) which are sequentially stacked in the direction away from the projection screen 100. The substrate layer is a transparent film layer. When displaying an image, light beams are emitted from the projection screen 100, dispersed by the diffusion layer, and then reflected on the surface of the Fresnel lens layer, so that users can watch the image.

[0154] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are intended to indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0155] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0156] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection screen, characterized in that: include: A display film having a projection light receiving surface; Screen frame, including: A plurality of frames, wherein the plurality of frames are connected and arranged around the outer periphery of the display film; A pre-installed component is movably provided on the screen frame, and the pre-installed component includes: a telescopic member, wherein the abutting end of the telescopic member abuts against the first end of the screen frame, and the connecting end of the telescopic member is located at the second end of the screen frame and connected to the end of the display film; The telescopic member has a telescopic amount relative to the first end of the screen frame. When the abutting end of the telescopic member is configured to move away from the second end of the screen frame, the display film is in a stretched state.

2. The projection screen according to claim 1, wherein The moving direction of the telescopic member matches the stretching direction of the display film.

3. The projection screen according to claim 1, wherein: The frame has a movable groove, and the movable groove extends along the width direction of the frame; The telescopic member is located in the moving groove and moves in the moving groove.

4. The projection screen according to any one of claims 1 to 3, characterized in that: The screen frame further includes a support rod connected to the end of the display film, and the telescopic member abuts between the support rod and the frame.

5. The projection screen according to claim 4, characterized in that One of the support rod and the display film has a positioning block, and the other of the support rod and the display film has a positioning hole. The positioning block matches the positioning hole structure and is inserted into the positioning hole to connect the support rod and the display film.

6. The projection screen according to claim 5, characterized in that The pre-installed assembly further includes: a tensioning member connected between the frame and the support rod; The tensioning member has a switchable installation state and a detached state relative to the screen frame. When the tensioning member switches from the detached state to the installation state, the tensioning member provides tensioning force for the telescopic member. When the tensioning member switches from the installed state to the disengaged state, the telescopic member is configured to be disengaged from the tensioning force and move along the direction of the display film, so that the display film is in a stretched state.

7. The projection screen according to claim 6, characterized in that The support rod has the positioning block, which is located outside the frame when the tensioning member switches from the disengaged state to the installed state, and is located inside the frame when the tensioning member switches from the installed state to the disengaged state.

8. The projection screen according to claim 6, characterized in that The telescopic member is a compression spring, and the tensioning member is a screw; When the tensioning member switches from the disengaged state to the installed state, the tensioning member drives the support rod to move in a direction facing the display film and presses the compression spring, so that the compression spring is in a compressed state; When the tensioning member switches from the installed state to the disengaged state, the compression spring is released from the tensioning force to push the support rod to move in a direction away from the display film.

9. The projection screen according to claim 4, characterized in that The telescopic member is a cam structure having a central axis, a first abutting surface, and a second abutting surface, wherein the second abutting surface is farther away from the central axis than the first abutting surface; The pre-installation assembly further includes a rotating member, the rotating member being disposed on the cam structure, the rotating member rotating relative to the screen frame and having a first position and a second position; When the rotating member rotates to the first position, the support rod abuts against the first abutting surface; when the rotating member rotates to the second position, the support rod abuts against the second abutting surface.

10. A projection system, characterized in that: It comprises a projection device and a projection screen according to any one of claims 1 to 9, wherein the projection device is used to project a projection picture onto the projection screen.

Images