WO2021129500A1

WO2021129500A1 - Projection screen, flatness adjusting devices, and supporting and limiting device

Info

Publication number: WO2021129500A1
Application number: PCT/CN2020/137084
Authority: WO
Inventors: 李士杰; 唐泽达; 赵振宇; 王霖; 胡飞; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2019-12-24
Filing date: 2020-12-17
Publication date: 2021-07-01
Also published as: CN211956103U

Abstract

The present utility model provides a projection screen, flatness adjusting devices, and a supporting and limiting device. The projection screen comprises a left frame, a right frame, a curtain, and the flatness adjusting devices, wherein the curtain is fixed between the left frame and the right frame; the flatness adjusting devices are respectively provided on the left frame and the right frame and used for adjusting the flatness of the projection screen; each of the flatness adjusting devices comprises a first supporting structure and a first adjusting structure, wherein the first supporting structure is used for being connected to a supporting carrier; the first adjusting structure is used for being connected to the left frame or the right frame; and the first supporting structure is screwed into the first adjusting structure by means of threads and is fixed, so that a projection screen surface is good in flatness, easy to fold, small in size, light in weight, and convenient to transport and install.

Description

Projection screen, flatness adjusting device and supporting limit device

Technical field

The utility model relates to a projection screen, a flatness adjustment device and a supporting limit device used for the projection screen, and belongs to the technical field of display screen manufacturing.

Background technique

Projection screens currently on the market usually include two types: soft screens and hard screens. Among them, the soft curtain can be curled up and down during use, or it can be tightened by a frame. The advantage of this soft curtain is that it is convenient to transport and light in weight; the disadvantage is that the surface of the curtain is not flat enough, and it is easy to wrinkle during tightening or use. Affect the clarity of the image on the screen and affect the viewing effect. Another type of hard screen uses a high-hardness backplane to fix the Fresnel screen using assembly techniques such as lamination. This installation method can ensure the flatness of the screen, thereby ensuring the viewing effect of high-quality projection display, but when the wall is When it is uneven or tilted, the traditional backplane installation method may not be able to guarantee the good flatness of the screen. In addition, because the backplane uses metal materials such as honeycomb aluminum, the overall weight is large, and the screen cannot be bent, which makes installation and transportation more difficult. Great difficulty.

Whether it is mobile small business presentations, multimedia conference rooms, classrooms, stadiums, churches, commercial venues, large auditoriums, medium and large projection systems, virtual displays and even large screen projection systems in movie theaters, along with various projection equipment More and more applications in various occasions have become familiar to more and more consumers, but the above-mentioned shortcomings of the matching projection screens are a common bottleneck problem. Therefore, it is urgent to introduce a projection display screen that is convenient for transportation and installation, flatness and reliability, and is convenient for consumers to use various projection equipment and display equipment.

Utility model content

The technical problem to be solved by the utility model is to aim at the deficiencies of the prior art, and to provide a projection screen with good flatness, easy folding, small size and light weight, and convenient transportation and installation.

The technical problem to be solved by the utility model is realized through the following technical solutions:

In the first aspect, the present invention proposes a projection screen, which includes a left frame, a right frame, a screen, and a flatness adjustment device, the screen is fixed between the left frame and the right frame; the flatness adjustment devices are respectively Are arranged on the left and right frames to adjust the flatness of the projection screen; the flatness adjustment device includes a first support structure and a first adjustment structure, and the first support structure is used to connect a support carrier The first adjustment structure is used to connect the left frame or the right frame, and the first support structure is screwed into the first adjustment structure through a thread and fixed.

Further, it further includes: an upper frame, a lower frame, the upper frame and the lower frame, the upper frame and the lower frame are connected to the left frame and the right frame by a stuffing cover structure; the flatness adjusting device is arranged at the Describe the left border and the back of the right border.

Further, the widths of the upper frame, the lower frame, the left frame, and the right frame are the same and small. Further, the left frame and the right frame further include: a clip structure and a triangular groove for accommodating the clip structure, the The first contact surface of the clip structure is attached to the screen, and the first contact surface and the triangular groove clamp the screen together.

Further, the edge of the screen is provided with a rectangular through groove, the first contact surface of the clip structure is provided with a convex structure that is completely consistent with the length and width of the rectangular through groove, and the convex structure is used for It is connected with the rectangular through groove.

Furthermore, the back of the left frame and the back of the right frame are also provided with frame back rivets.

Further, it further includes: a supporting and limiting device, the supporting and limiting device includes a fixed block and an outer fastening slider and an inner fastening slider provided in the fixed block, and the outer fastening slider and the A fastening cavity for accommodating the rivets on the back of the frame is provided between the inner fastening sliders, the outer fastening slider is provided with a threadless first through fastening hole, and the inner fastening slider is provided with a Threaded second through-fastening holes, the first through-fastening holes and the second through-fastening holes are used for assembling clamping screws, the outer fastening slider, the inner fastening slider, the clamping screw, the tightening The solid cavity is used to clamp and fix the frame back rivet; the supporting and limiting device is fixedly connected to the left frame or the right frame through the frame back rivet, and the fixing block is fixedly connected to the support carrier, The supporting and limiting device is used to fix the projection screen on the supporting carrier.

Further, the fixed block is also provided with a sliding groove, and the inner fastening slider and the outer fastening slider can move in the sliding groove; the fixed block is also provided with a transverse tension holding screw , The side wall of the fixing block is provided with a mounting hole for mounting the transverse tension screw, the inner wall of the mounting hole is provided with a mounting thread, the transverse tension screw is screwed into the mounting hole through the mounting thread and Contact with the inner fastening block and generate a thrust, and the lateral tension holding screw is used to push the inner fastening slider to move in the sliding groove, thereby further driving the rivet on the back of the frame to move.

In the second aspect, the present utility model proposes a flatness adjustment device for connecting to the projection screen. The flatness adjustment device is respectively arranged on the left and right frames and is used to adjust the projection screen. Flatness; the flatness adjustment device includes a first support structure and a first adjustment structure, the first support structure is used to connect the support carrier, the first adjustment structure is used to connect the left frame or the On the right frame, the first supporting structure is screwed into the first adjusting structure through threads and fixed.

In the third aspect, the present invention proposes a supporting and limiting device for connecting the projection screen. The supporting and limiting device includes a fixed block and an outer fastening slider and an inner tightening block arranged in the fixed block. A fixed sliding block, a fastening cavity for accommodating the rivet on the back of the frame is provided between the outer fastening sliding block and the inner fastening sliding block, and the outer fastening sliding block is provided with a threadless first through-tightening Fixing holes, the inner fastening slider is provided with a second through fastening hole containing threads, the first through fastening holes and the second through fastening holes are used for assembling clamping screws, the outer fastening sliding Block, inner fastening slider, clamping screw, and fastening cavity are used to clamp and fix the frame back rivet; the supporting and limiting device is fixedly connected to the left frame or the right frame through the frame back rivet The fixing block is fixedly connected to the supporting carrier, and the supporting and limiting device is used to fix the projection screen on the supporting carrier.

In summary, the present utility model provides a projection screen and a flatness adjustment device and a supporting and limiting device for the projection screen. The product screen has good flatness, is not easy to be deformed and wrinkled, is small in size and light in weight, and is convenient for transportation and installation. .

The technical solution of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

Description of the drawings

Figure 1 is a schematic diagram of the assembly of the projection screen of the utility model;

Figure 2 is a schematic diagram of the utility model when the projection screen is rolled and folded;

Figure 3a is a schematic diagram of the structure of the flatness adjusting device of the present invention;

Figure 3b is a schematic diagram of the assembly of the flatness adjusting device of the present invention;

Figure 4 is a schematic diagram of the assembly of the blind cover of the present invention;

Figure 5 is a schematic diagram of the assembly of the projection screen of the utility model;

Figure 6 is a schematic structural diagram of the utility model projection screen clip structure;

Figure 7 is another assembly diagram of the projection screen of the utility model;

Figure 8 is a schematic diagram of the structure of the projection screen supporting and limiting device of the present invention.

Detailed ways

The screen of the utility model can be used in the field of projection display, and can also be used in other display fields for displaying images. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not used to limit the present utility model.

As shown in Figures 1 and 2, the present invention proposes a projection screen, which includes a left frame 11, a right frame 12, a screen 13, and a flatness adjustment device 20. The screen 13 is fixed on the left frame 11 and the right frame. Between the frames 12; the flatness adjustment device 20 is arranged on the left frame 11 and the right frame 12 for adjusting the flatness of the projection screen. The curtain 13 is fixed by the left frame 11 and the right frame 12, and the left frame 11 and the right frame 12 are respectively fixed on the wall 10 by the flatness adjustment device 20 shown. The flatness adjustment device 20 has an independent three-dimensional adjustment function. 1. Adjust the second and third directions. The first direction is the vertical screen direction, the second direction is the horizontal direction, and the third direction is the vertical direction. Optionally, the left frame 11 and the right frame 12 are respectively provided with 2 flatness adjustment devices 20.

As shown in FIGS. 3a and 3b, the flatness adjustment device 20 includes a first support structure 201 and a first adjustment structure 202, and the first support structure 201 is connected to the first adjustment structure 202 through a thread; The first support structure 201 is used to connect the support carrier, and the first adjustment structure 202 is used to connect the left frame 11 and the right frame 12. The first support structure 201 is fixed on the wall 10 and is connected with the first adjustment structure 202 through threads. The device can be inserted into the grooves of the left frame 11 and the right frame 12, and at the same time, the flatness can be adjusted by rotating the threads. Adjust the thickness of the device 20 to adjust the distance between the left frame 11 or the right frame 12 and the wall 10, thereby adjusting the distance between the screen 13 and the wall 10, thereby adjusting the flatness of the screen 13, that is, it has a first direction The adjustment function. By changing the up, down, left, and right positions of the flatness adjustment device 20 on the left frame 11 or the right frame 12, the adjustment function in the second direction and the third direction can be provided. Optionally, threads of different lengths can be used to rotate and adjust the thickness of the flatness adjustment device 20. Optionally, the fixed adjustment device is hidden behind the left frame 11 or the right frame 12 of the screen to ensure the beautiful appearance of the projection screen when viewed from the front. Through the design of the left frame 11, the right frame 12 and the flatness adjustment device 20, the projection screen has a good flatness, is not easy to deform and wrinkle, is easy to fold, is small in size and light in weight, and is convenient to transport and install.

As shown in FIG. 4, the projection screen further includes: an upper frame 15, a lower frame 16, and the upper frame 15, the lower frame 16 are connected to the left frame 11 and the right frame 12 through a cross bar 22 and a cover 21 structure; The flatness adjusting device 20 is arranged on the back of the left frame 11 and the right frame 12. Further, the widths of the upper frame 15, the lower frame 16, the left frame 11, and the right frame 12 are the same and less than or equal to 15 mm. Due to the need to consider the installation accuracy and the effects of thermal expansion and contraction, the four corners of the screen are installed with the blind cover 21 for interference fit. This makes the overall structure of the projection screen more stable, easier to clean and maintain, and more beautiful in appearance. Optionally, the upper frame 15 and the lower frame 16 are decorative frames, which do not provide surface tension for the screen 13, but if the screen 13 is not flat, the upper frame 15 and the lower frame 16 can correct the screen 13 in the third direction through its own buckle structure The unevenness.

As shown in FIG. 5, the left frame 11 and the right frame 12 further include: a clip bar 30 structure and a triangular groove for accommodating the clip bar 30 structure, the first contact surface of the clip bar 30 structure and the screen 13 To fit together, the first contact surface and the triangular groove clamp the curtain 13 together. Optionally, the first contact surface of the clip 30 is attached to the edge of the screen 13 by means of gluing, etc. The clip 30 moves along the slope to apply vertical pressure to the screen 13 to press the edge of the screen 13 and the inner side of the frame to ensure that the screen is not easy for a long time. dislocation.

As shown in FIG. 6, the edge of the screen 13 is provided with a rectangular through groove 131, and the first contact surface of the clip 30 structure is provided with a convex structure that is exactly the same as the length, width and thickness of the rectangular through groove 131 301. The protruding structure 301 is used to connect with the rectangular through groove 131, and the clip strip 30 is connected to the screen 13 by snaps, and then is filled into the left frame 11 or the right frame 12 to be fixed, so that the screen 13 and the clip strip 30 can be more closely combined, and can reduce the amount of glue, it can also be easier to assemble and disassemble.

As shown in Figs. 5, 7, and 8, the left frame 11 and the right frame 12 are further provided with frame back rivets 31 on the back. The frame back rivet 31 is fixed on the back of the left frame 11 and the right frame 12 for connecting with the supporting and limiting device 40. The position of the frame back rivet 31 determines the position of the frame at this point. Optionally, the width of the frame on the back of the screen is larger (preferably greater than 20mm) to provide stronger bending strength.

Preferably, it further includes: a supporting and limiting device 40, which is installed on a supporting carrier such as a wall 10, and is connected to the projection screen frame by a rivet 31 on the back of the frame. The supporting and limiting device 40 includes a fixed block 401 and an outer fastening slider 4011 and an inner fastening slider 4012 provided in the fixed block 401, and the outer fastening slider 4011 and the inner fastening slider are provided in the fixed block 401. There is a fastening cavity for accommodating the rivets 31 on the back of the frame, the outer fastening slider 4011 is provided with a threadless first through fastening hole 402, and the inner fastening slider 4012 is provided with a thread The second through-fastening hole, the first through-fastening hole 402 and the second through-fastening hole are used to assemble clamping screws, the outer fastening slider 4011, the inner fastening slider 4012, and the clamping screw , The fastening cavity is used to clamp and fix the frame back rivet 31; the supporting and limiting device 40 is fixedly connected to the left frame 11 or the right frame 12 through the frame back rivet 31, the fixing block 401 It is fixedly connected to the supporting carrier such as the wall 10, and the supporting and limiting device 40 is used to fix the projection screen on the supporting carrier such as the wall 10.

The clamping screw enters through the first through-fastening hole 402 of the outer fastening slider 4011 and is tightened in the second through-fastening hole of the inner fastening slider 4012. The elliptical hole of the fastening cavity through which the frame back rivet 31 passes is smaller than the diameter of the frame back rivet 31 when it is fully closed, so the frame back rivet 31 can be tightened, so that the projection screen can be more firmly fixed.

The fixed block 401 is also provided with a sliding groove, the inner fastening slider 4012 and the outer fastening slider 4011 can move in the sliding groove; the fixed block 401 is also provided with a transverse tension holding The screw 403 is used to limit the position of the inner fastening slider 4012, and can adjust the transverse (second direction) tension when the curtain 13 of the projection screen is tight. An installation hole for installing the transverse tension screw 403 is provided on the side wall of the fixing block 401, and the inner wall of the installation hole is provided with an installation thread, and the transverse tension screw 403 is screwed into the installation through the installation thread. Hole and contact with the inner fastening block 4012 and generate a thrust. The lateral tension maintaining screw 403 is used to push the inner fastening slider 4012 to move in the chute, thereby rivets to the back of the frame The pushing force 31 is applied to push the left frame 11 and the right frame 12 to apply tension to the screen 13.

Optionally, the long sides of the elliptical hole of the fastening cavity are parallel to the left frame 11 and the right frame 12 to accommodate installation errors.

In summary, through the flatness adjusting device 20 and the supporting and limiting device 40, the projection screen has a good flatness, is not easy to be deformed and wrinkled, is small in size, light in weight, and convenient to transport and install.

In the second aspect, as shown in Figure 3a and Figure 3b, the present invention proposes a flatness adjusting device 20, which is respectively arranged on the left frame 11 and the right frame 12 for connecting the projection screen, and the flatness adjustment device 20 is provided on the left frame 11 and the right frame 12 respectively. The degree adjustment device 20 includes a first support structure 201 and a first adjustment structure 202. The first support structure 201 is connected to the first adjustment structure 202 through threads; the first support structure 201 is used to connect a support carrier, The first adjusting structure 202 is used to connect the left frame 11 and the right frame 12. The first support structure 201 is fixed on the wall 10 and is connected with the first adjustment structure 202 through threads. The device can be inserted into the grooves of the left frame 11 and the right frame 12, and at the same time, the flatness can be adjusted by screw rotation. The thickness of the adjusting device 20 is adjusted to adjust the distance between the left frame 11 or the right frame 12 and the wall 10, thereby adjusting the distance between the screen 13 and the wall 10, thereby adjusting the flatness of the screen 13. Optionally, threads of different lengths can be used to rotate and adjust the thickness of the flatness adjustment device 20. Optionally, the fixed adjustment device is hidden behind the left frame 11 or the right frame 12 of the screen, which reduces the overall size of the projection screen, saves installation space, and can increase the appearance of the projection screen when viewed from the front.

In the third aspect, as shown in FIG. 8, the present invention proposes a supporting and limiting device 40 for connecting the projection screen. The supporting and limiting device 40 is installed on a supporting carrier such as a wall 10, and at the same time passes through the rivets on the back of the frame 31 is connected to the projection screen frame. The supporting and limiting device 40 includes a fixed block 401 and an outer fastening slider 4011 and an inner fastening slider 4012 provided in the fixed block 401, and the outer fastening slider 4011 and the inner fastening slider are provided in the fixed block 401. There is a fastening cavity for accommodating the rivets 31 on the back of the frame, the outer fastening slider 4011 is provided with a threadless first through fastening hole 402, and the inner fastening slider 4012 is provided with a thread The second through-fastening hole, the first through-fastening hole 402 and the second through-fastening hole are used to assemble clamping screws, the outer fastening slider 4011, the inner fastening slider 4012, and the clamping screw , The fastening cavity is used to clamp and fix the frame back rivet 31; the supporting and limiting device 40 is fixedly connected to the left frame 11 or the right frame 12 through the frame back rivet 31, the fixing block 401 It is fixedly connected to the supporting carrier such as the wall 10, and the supporting and limiting device 40 is used to fix the projection screen on the supporting carrier such as the wall 10.

Optionally, a sliding groove is further provided in the fixed block 401, and the inner fastening slider 4012 and the outer fastening slider 4011 can move in the sliding groove; the fixed block 401 is also provided There are lateral tension retention screws 403, which are used to limit the position of the inner fastening slider 4012, and can adjust the lateral (second direction) tension when the curtain 13 of the projection screen is tightened. An installation hole for installing the transverse tension screw 403 is provided on the side wall of the fixing block 401, and the inner wall of the installation hole is provided with an installation thread, and the transverse tension screw 403 is screwed into the installation through the installation thread. Hole and contact with the inner fastening block 4012 and generate a thrust. The lateral tension maintaining screw 403 is used to push the inner fastening slider 4012 to move in the chute, thereby rivets to the back of the frame The pushing force 31 is applied to push the left frame 11 and the right frame 12, thereby applying tension to the screen 13, making the screen 13 more flat.

The above are only the embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by the content of the description and drawings of the utility model, or directly or indirectly applied to other Related technical fields are included in the scope of patent protection of the utility model in the same way.

Claims

A projection screen, characterized in that it comprises a left frame, a right frame, a screen, and a flatness adjustment device, the screen is fixed between the left frame and the right frame; the flatness adjustment devices are respectively arranged on the left The frame and the right frame are used to adjust the flatness of the projection screen; the flatness adjusting device includes a first support structure and a first adjustment structure, the first support structure is used to connect the support carrier, the first The adjustment structure is used to connect the left frame or the right frame, and the first support structure is screwed into the first adjustment structure through threads and fixed.
The projection screen according to claim 1, further comprising: an upper frame and a lower frame, wherein the upper frame and the lower frame are connected to the left frame and the right frame through a cover structure; the flatness adjusting device Set on the back of the left and right frames.
The projection screen according to claim 2, wherein the widths of the upper frame, the lower frame, the left frame, and the right frame are the same and less than or equal to 15 mm.
The projection screen according to claim 1, wherein the left frame and the right frame further comprise: a clip structure and a triangular groove for accommodating the clip structure, the first contact surface of the clip structure and the The curtain is attached to each other, and the first contact surface and the triangular groove clamp the curtain together.
The projection screen according to claim 4, wherein the edge of the screen is provided with a rectangular through groove, and the first contact surface of the clip structure is provided with a length, width and thickness completely consistent with the rectangular through groove. The raised structure is used to connect with the rectangular through groove.
The projection screen according to claim 1, wherein the left frame and the right frame are further provided with frame back rivets.
The projection screen according to claim 6, further comprising: a supporting and limiting device, the supporting and limiting device comprises a fixed block and an outer fastening slider and an inner fastening slide provided in the fixed block. Block, a fastening cavity for accommodating the rivet on the back of the frame is provided between the outer fastening slider and the inner fastening slider, and the outer fastening slider is provided with a threadless first through fastening hole , The inner fastening slider is provided with a second through fastening hole containing a thread, the first through fastening hole and the second through fastening hole are used for assembling a clamping screw, the outer fastening slider, The inner fastening slider, the clamping screw, and the fastening cavity are used to clamp and fix the frame back rivet; the supporting and limiting device is fixedly connected to the left frame or the right frame through the frame back rivet, so The fixing block is fixedly connected to the supporting carrier, and the supporting and limiting device is used to fix the projection screen on the supporting carrier.
7. The projection screen according to claim 7, wherein a sliding groove is further provided in the fixed block, and the inner fastening sliding block and the outer fastening sliding block can move in the sliding groove; The fixing block is also provided with a transverse tension holding screw, a mounting hole for installing the transverse tension screw is provided on the side wall of the fixing block, and the inner wall of the mounting hole is provided with a mounting thread, and the transverse tension screw passes The mounting thread is screwed into the mounting hole and is in contact with the inner fastening block to generate a thrust, and the lateral tension maintaining screw is used to push the inner fastening slider to move in the chute, thereby It further drives the rivets on the back of the frame to move.
A flatness adjusting device for connecting to the projection screen according to any one of claims 1 to 8, wherein the flatness adjusting device is respectively arranged on the left frame and the right frame for Adjust the flatness of the projection screen; the flatness adjustment device includes a first support structure and a first adjustment structure, the first support structure is used to connect the support carrier, the first adjustment structure is used to connect the For the left frame or the right frame, the first supporting structure is screwed into the first adjusting structure through threads and fixed.
A supporting and limiting device for connecting to the projection screen according to any one of claims 1 to 8, wherein the supporting and limiting device comprises a fixed block and an outer tightening device arranged in the fixed block. The fixed sliding block and the inner fastening sliding block are provided with a fastening cavity for accommodating the rivets on the back of the frame between the outer fastening sliding block and the inner fastening sliding block, and the outer fastening sliding block is provided with a threadless A first through fastening hole, the inner side fastening slider is provided with a second through fastening hole containing a thread, the first through fastening hole and the second through fastening hole are used for assembling a clamping screw, the The outer fastening slider, the inner fastening slider, the clamping screws, and the fastening cavity are used to clamp and fix the rivets on the back of the frame; the supporting and limiting device is connected to the left frame or the left frame through the rivets on the back of the frame. The right frame is fixedly connected, the fixing block is fixedly connected to the supporting carrier, and the supporting and limiting device is used to fix the projection screen on the supporting carrier.
The supporting and limiting device according to claim 10, wherein a sliding groove is further provided in the fixed block, and the inner fastening sliding block and the outer fastening sliding block can move in the sliding groove The fixing block is also provided with a transverse tension holding screw, a mounting hole for installing the transverse tension screw is provided on the side wall of the fixing block, the inner wall of the mounting hole is provided with a mounting thread, the transverse tension The screw is screwed into the installation hole through the installation thread and contacts the inner fastening block to generate a thrust, and the lateral tension maintaining screw is used to push the inner fastening slider to move in the chute , Thereby further driving the rivets on the back of the frame to move.