CN220105506U - Screen frame and projection screen - Google Patents

Abstract

The application discloses a screen frame and a projection screen, and belongs to the field of projection display. The screen frame includes: the device comprises two first folding frames which are oppositely arranged, two second folding frames which are oppositely arranged and a third rotating mechanism. Two first sub-frames of each first folding frame can rotate around a first axis through a first rotating mechanism to fold, and two second sub-frames of one second folding frame can rotate around a second axis through a second rotating mechanism and rotate relative to the first sub-frames through a third rotating mechanism. In this way, the individual components of the screen frame can be assembled to form a unitary frame before the screen frame enters the user's residence. The two second sub-frames are rotated relatively through the second rotating mechanism, and can be folded after being rotated relatively to the first sub-frames through the third rotating mechanism. The distance between the two first folding frames can be shortened after folding, so that the overall size of the rectangular frame is smaller.

Description

Screen frame and projection screen

Technical Field

The present application relates to the field of projection display, and in particular, to a screen frame and a projection screen.

Background

With the continuous development of technology, laser projection systems are increasingly used in consumer work and life. Currently, laser projection systems mainly include: a laser projection device and a projection screen.

The laser projection device emits a light beam to the projection screen, and the projection screen receives the light beam to display pictures.

In the related art, the size of the projection screen is getting larger and larger, particularly, the projection screen of 100 inches and above. The space occupied by the projection screen is large, so that the transportation difficulty of the projection screen is inevitably increased.

Disclosure of Invention

The embodiment of the utility model provides a screen frame and a projection screen. The problem that the projection screen in the prior art occupies a large space and causes large transportation difficulty can be solved, and the technical scheme is as follows:

in one aspect, a screen frame is provided, the screen frame having a bearing surface, and the screen frame comprising:

two first folding frames of relative setting, every first folding frame includes: the first ends of the two first sub-frames are connected through the first rotating mechanism, and the first rotating mechanism is used for driving the two first sub-frames to fold or unfold around a first axis parallel to the bearing surface;

Two second folding frames of relative setting, every the second folding frame includes: the first ends of the two second sub-frames in one second folded frame are connected through a second rotating mechanism, and the first ends of the two second sub-frames in the other second folded frame are arranged separately; the second rotating mechanism is used for driving two second sub-frames in one second folding frame to fold or unfold around a second axis intersecting the bearing surface, and driving the two second sub-frames in one second folding frame to rotate around a third axis parallel to the bearing surface and perpendicular to the first axis;

and a third rotating mechanism for connecting the second end of the first sub-frame and the second end of the second sub-frame, wherein the third rotating mechanism is used for driving the second sub-frame to rotate around a fourth axis perpendicular to the bearing surface relative to the first sub-frame.

In another aspect, there is provided a projection screen comprising:

the screen frame and flexible curtain, flexible curtain laminating is in on the loading surface of screen frame, screen frame is the screen frame that any one of above-mentioned gave.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

a screen frame may include: the device comprises two first folding frames which are oppositely arranged, two second folding frames which are oppositely arranged and a third rotating mechanism. Two first sub-frames of each first folding frame in the screen frame can rotate around a first axis through a first rotating mechanism to fold, and two second sub-frames of one second folding frame can rotate around a second axis through a second rotating mechanism and rotate relative to the first sub-frames through a third rotating mechanism. In this manner, the individual components of the screen frame can be assembled to form an overall frame (i.e., a rectangular frame) before the screen frame enters the user's residence. The two second sub-frames are rotated relatively through the second rotating mechanism, and can be folded after being rotated relatively to the first sub-frames through the third rotating mechanism. The distance between the two first folding frames can be shortened after folding, so that the overall size of the rectangular frame is smaller. In addition, after the size of the rectangular frame in the length direction of the second folding frame is reduced, the first frame and the second frame in the rectangular frame can be rotated relatively through the first rotating mechanism, so that the folding frame is formed, and the overall size of the rectangular frame is further reduced. In addition, after the second folded frame is folded between the two first folded frames through the third rotating mechanism and the first folded frames are folded through the first rotating mechanism, the first ends of the two second sub-frames in the other second folded frame are separately arranged. Therefore, the second rotating mechanism can further drive the second sub-frame to rotate around the third axis to fold, so that the overall size of the rectangular frame after folding is further reduced, and the transportation difficulty of the screen frame can be effectively simplified. After the screen frame is integrated in the projection screen, the transportation difficulty of the projection screen can be effectively simplified.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a screen frame according to an embodiment of the present application;

fig. 2 is an effect diagram of a folded screen frame according to an embodiment of the present application;

FIG. 3 is a schematic view of another screen frame according to an embodiment of the present application;

FIG. 4 is a schematic view of a screen frame according to an embodiment of the present application after the first folding is completed;

FIG. 5 is a schematic diagram of a second folding process of a screen frame according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a screen frame according to an embodiment of the present application after the second folding is completed;

FIG. 7 is a schematic view of a third folding process of a screen frame according to an embodiment of the present application;

FIG. 8 is a schematic view of a screen frame according to an embodiment of the present application after the third folding is completed;

Fig. 9 is a schematic structural view of a second rotation mechanism according to an embodiment of the present application;

fig. 10 is a rotational effect schematic view of the second rotational structure shown in fig. 9;

FIG. 11 is a schematic view showing a folding effect of another screen frame according to an embodiment of the present application;

fig. 12 is a schematic connection diagram of a first sub-frame and a first limiting member according to an embodiment of the present application;

fig. 13 is a schematic connection diagram of a second sub-frame and a second limiting member according to an embodiment of the present application;

fig. 14 is a schematic connection diagram of another second limiting member and a second sub-frame according to an embodiment of the present application;

FIG. 15 is a schematic view of the second spacing member of FIG. 14 after being connected to two second sub-frames;

FIG. 16 is a schematic view of a third rotary structure according to an embodiment of the present application;

FIG. 17 is a schematic view of a first rotation mechanism according to an embodiment of the present application;

FIG. 18 is an exploded view of a projection screen according to an embodiment of the present application;

FIG. 19 is an exploded view of a flexible curtain according to an embodiment of the present application;

FIG. 20 is an exploded view of another projection screen provided in accordance with an embodiment of the present application;

FIG. 21 is a cross-sectional view of one sub-bezel of the screen frame shown in FIG. 20;

FIG. 22 is a schematic view showing the installation of a support bar according to an embodiment of the present application;

FIG. 23 is a schematic view of a flexible curtain mounted to a screen frame according to an embodiment of the present application;

fig. 24 is a schematic view of a portion of a projection screen according to an embodiment of the present application.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

In the related art, a frame for supporting a curtain in a projection screen is generally composed of a plurality of rims, and structural members for connecting the rims. However, the size of projection screens is now increasing, resulting in larger frames. If the frame is assembled and transported to the user living place, the transportation difficulty is high. If all the components in the frame are disassembled and then transported to the place where the user resides for assembly, the user assembly is complicated, the assembly time is long, and the experience of the user is poor.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a screen frame according to an embodiment of the application. The screen frame may have a bearing surface, and the screen frame may include: two first folding rims 100 disposed opposite to each other, two second folding rims 200 disposed opposite to each other, and a third rotation mechanism 300. Wherein the screen frame may be integrated in a projection screen, and the carrying surface of the screen frame may be a surface for carrying a flexible curtain (not shown) in the projection screen after the screen frame is flattened.

Each of the first folding border 100 in the screen frame may include: two first sub-frames 101, and a first rotation mechanism 102 located between the two first sub-frames 101. The first ends of the two first sub-frames 101 may be connected by a first rotation mechanism 102, and the first rotation mechanism 102 may be used to drive the two first sub-frames 101 to fold or unfold about a first axis L1 parallel to the carrying surface of the screen frame.

Each of the second folding border 200 in the screen frame may include: the first ends of the two second sub-frames 201 in one second folded frame 200 may be connected through the second rotation mechanism 202, and the first ends of the two second sub-frames 201 in the other second folded frame 200 are separately disposed. The second rotating mechanism 202 may be used to drive the two second sub-frames 201 of the second folded frame 200 to fold or unfold around a second axis L2 intersecting the bearing surface of the screen frame, and may be used to drive the two second sub-frames 201 of the second folded frame 200 to rotate around a third axis L3 parallel to the bearing surface of the screen frame and perpendicular to the first axis L1.

The third rotation mechanism 300 in the screen frame may be used to rotate the second sub-frame 201 relative to the first sub-frame 101 about a fourth axis L4 perpendicular to the bearing surface of the screen frame. In the two opposite first folding frames 100 and the two opposite second folding frames 200 of the screen frame, the second ends of the first sub-frames 101 and the second ends of the second sub-frames 201 that are adjacently disposed may be rotatably connected by the third rotation mechanism 300.

In the present application, after the two first folding rims 100 disposed opposite to each other and the two second folding rims 200 disposed opposite to each other in the screen frame 000 are sequentially connected end to end, a rectangular frame a can be formed. The rectangular frame a may include: a first frame A1 and a second frame A2. Wherein one first sub-frame 101 of one first folded frame 100 and one first sub-frame 101 of the other first folded frame 100, and one second folded frame 200 between the two first sub-frames 101 may constitute a first frame A1. The other first sub-frame 101 of the one first folded frame 100 and the other first sub-frame 101 of the other first folded frame 100, and the one second folded frame 200 between the two first sub-frames 101 may constitute a second frame A2. The first rotation mechanism 102 may be located between the first frame A1 and the second frame A2, and the first frame A1 and the second frame A2 can be relatively rotated by the first rotation mechanism 102 to form a folded frame. In addition, when the first frame A1 is rotated to the coplanar position with respect to the second frame A2 by the first rotation mechanism 102, the first frame A1 and the second frame A2 can constitute a rectangular frame a. For example, the two first folded rims 100 disposed opposite to each other may be long rims in a rectangular frame, and the two second folded rims 200 disposed opposite to each other may be short rims in a rectangular frame. Alternatively, the two first folded rims 100 disposed opposite to each other may be short rims of the rectangular frame, and the two second folded rims 200 disposed opposite to each other may be long rims of the rectangular frame. It should be noted that, in the embodiment of the present application, two first folding frames 100 that are oppositely disposed are long frames in a rectangular frame, and two second folding frames 200 that are oppositely disposed are short frames in a rectangular frame.

For example, please refer to fig. 1 and fig. 2, fig. 2 is an effect diagram of a folded screen frame according to an embodiment of the present application. Two first sub-frames 101 of each first folding frame 100 in the screen frame can be rotated about a first axis L1 by a first rotation mechanism 102 to be folded, and two second sub-frames 201 of one second folding frame 200 can be rotated about a second axis L2 by a second rotation mechanism 202 and rotated relative to the first sub-frames 101 by a third rotation mechanism 300. In this manner, the individual components of the screen frame can be assembled to form an overall frame (i.e., a rectangular frame) before the screen frame enters the user's residence. The two second sub-frames 201 can be folded after being rotated relative to each other by the second rotation mechanism 202 and rotated relative to the first sub-frame 101 by the third rotation mechanism 300. The distance between the two first folding rims 100 can be shortened after folding, so that the overall size of the rectangular frame is smaller. In addition, after the size of the rectangular frame in the length direction of the second folded rim 200 is reduced, the first frame A1 and the second frame A2 in the rectangular frame can be relatively rotated by the first rotation mechanism 102 to form a folded frame, and the overall size of the rectangular frame is further reduced. After the second folded frame 200 is folded between the two first folded frames 100, and the first folded frame 100 is folded by the first rotating mechanism 102, the first ends of the two second sub-frames 201 in the other second folded frame 200 are separately disposed. Therefore, the second rotating mechanism 202 can further drive the second sub-frame 201 to rotate around the third axis L3 to fold, so that the overall size of the folded rectangular frame is further reduced, and the transportation difficulty of the screen frame can be effectively simplified. After the screen frame is integrated in the projection screen, the transportation difficulty of the projection screen can be effectively simplified.

In summary, the embodiment of the present application provides a screen frame, which may include: the device comprises two first folding frames which are oppositely arranged, two second folding frames which are oppositely arranged and a third rotating mechanism. Two first sub-frames of each first folding frame in the screen frame can rotate around a first axis through a first rotating mechanism to fold, and two second sub-frames of one second folding frame can rotate around a second axis through a second rotating mechanism and rotate relative to the first sub-frames through a third rotating mechanism. In this manner, the individual components of the screen frame can be assembled to form an overall frame (i.e., a rectangular frame) before the screen frame enters the user's residence. The two second sub-frames are rotated relatively through the second rotating mechanism, and can be folded after being rotated relatively to the first sub-frames through the third rotating mechanism. The distance between the two first folding frames can be shortened after folding, so that the overall size of the rectangular frame is smaller. In addition, after the size of the rectangular frame in the length direction of the second folding frame is reduced, the first frame and the second frame in the rectangular frame can be rotated relatively through the first rotating mechanism, so that the folding frame is formed, and the overall size of the rectangular frame is further reduced. In addition, after the second folded frame is folded between the two first folded frames through the third rotating mechanism and the first folded frames are folded through the first rotating mechanism, the first ends of the two second sub-frames in the other second folded frame are separately arranged. Therefore, the second rotating mechanism can further drive the second sub-frame to rotate around the third axis to fold, so that the overall size of the rectangular frame after folding is further reduced, and the transportation difficulty of the screen frame can be effectively simplified. After the screen frame is integrated in the projection screen, the transportation difficulty of the projection screen can be effectively simplified.

Optionally, referring to fig. 3, fig. 3 is a schematic structural diagram of another screen frame according to an embodiment of the present application. The second rotating mechanism 202 in the second folding frame 200 may include: two adapters 2021, which are respectively connected to the first ends of the two second sub-frames 201 in the second folded frame 200 in a rotating manner, and a connecting piece 2022 located between the two adapters 2021, wherein the end of each adapter 2021 facing away from the second sub-frame 201 can be connected to the connecting piece 2022 in a rotating manner by a first rotating shaft 2023. When the axis F1 of the first rotation axis 2023 is parallel to the second axis L2, the two adapters 2021 can drive the two second sub-frames 201 to fold or unfold around the second axis L2, and after the two adapters 2021 drive the two second sub-frames 201 to fold around the second axis L2, the axis of the adapter 2021 can be parallel to the third axis L3, and each adapter 2021 can rotate around the axis of the adapter 2021 relative to the connecting element 2022. For example, please refer to fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, fig. 4 is a schematic diagram of a screen frame provided by an embodiment of the present application after the first folding is completed, fig. 5 is a schematic diagram of a screen frame provided by an embodiment of the present application during the second folding, fig. 6 is a schematic diagram of a screen frame provided by an embodiment of the present application after the second folding is completed, fig. 7 is a schematic diagram of a screen frame provided by an embodiment of the present application during the third folding, and fig. 8 is a schematic diagram of a screen frame provided by an embodiment of the present application after the third folding is completed. When the screen frame is folded, the two adapters 201 can drive the two second sub-frames 201 in the second folded frame 200 to fold around the second axis L2 (in this process, the adapters rotate relative to the connectors through the first rotation shaft), and after the two second sub-frames 201 are folded to the final state (the length directions of the two second sub-frames are parallel to the second axis); the two first sub-frames 101 in each first folding frame 100 can be folded around the first axis L1 under the drive of the first rotating mechanism 102, and after the two first sub-frames 101 are folded to a final state (two first sub-frames are stacked); each adaptor 2021 is further capable of rotating about the axis of the adaptor 2021 relative to the connecting element 2022, such that the adaptor 2021 is capable of rotating the second sub-frame 201 connected to this adaptor 2021 about the third axis L3 for folding. It should be noted that, since the first ends of the two second sub-frames 201 in the other second folded frame 200 are separately disposed. Therefore, in the process of rotating the two second sub-frames 201 of one second folded frame 200 around the third axis L3, the two second sub-frames 201 of the other second folded frame 200 can be driven to rotate around the third axis L3, so that the screen frame can be further folded.

In the embodiment of the present application, please refer to fig. 9 and 10, fig. 9 is a schematic structural diagram of a second rotating mechanism provided in the embodiment of the present application, and fig. 10 is a schematic rotational effect diagram of the second rotating mechanism shown in fig. 9. The adaptor 2021 in the second rotation mechanism 202 may include: the first sub-adaptor B1 fixedly connected to the first end of the second sub-frame 201, the second sub-adaptor B2 rotatably connected to the connecting element 2022, and the second rotating shaft B3 located between the first sub-adaptor B1 and the second sub-adaptor B2. One end of the second rotating shaft B3 may be fixedly connected to the end portion of the first sub-adaptor B1 away from the second sub-frame 201, the other end of the second rotating shaft B3 may be rotatably connected to the second sub-adaptor B2, and the axis of the second rotating shaft B3 may be perpendicular to the axis of the first rotating shaft 2023. In this case, by providing the first sub-adaptor B1 fixedly connected to the first end of the second sub-frame 201 in the adaptor 2021, the second sub-adaptor B2 rotatably connected to the connector 2022, and the second rotation shaft B3 between the first sub-adaptor B1 and the second sub-adaptor B2, the axis F2 of the second rotation shaft B3 is perpendicular to the axis F1 of the first rotation shaft 2023. As shown in fig. 8 and 9, the first sub-adaptor B1 can rotate relative to the second sub-adaptor B2 through the second rotating shaft B3 to rotate the second sub-frame 201 around the third axis L3.

Alternatively, as shown in fig. 9 and 10, an end portion of the second sub-adaptor B2 of the adaptor 2021, which is close to the second rotation shaft B3, may have a connection hole a1, and a side wall of the second sub-adaptor B2 may have a limiting chute a2 communicating with the connection hole a1, and at least part of the second rotation shaft B3 may be located in the connection hole a1 of the second sub-adaptor B2. The adaptor 2021 may further comprise: and one end of the limiting column B4 can pass through a limiting chute a2 on the side wall of the second sub-adapter B2 and then is fixedly connected with the second rotating shaft B3. Under the condition, the first sub-adaptor B1 can be in rotational connection with the second sub-adaptor B2 through the cooperation of the second rotating shaft B3 and the connecting hole a1, and the first sub-adaptor B1 can be limited by being abutted against two ends of the limiting sliding groove a2 through the limiting column B4 after rotating to the target position relative to the second sub-adaptor B2. Thus, the convenience of operation of an operator in the folding or unfolding process of the screen frame is improved. In the application, the limit chute a2 may be an arc chute, and the arc angle corresponding to the arc chute may be greater than 0 degrees and less than or equal to 90 degrees.

In the embodiment of the present application, as shown in fig. 10, the end of the connecting piece 2022 near the adaptor 2021 in the second rotation mechanism 202 may have a limiting groove a3, and the second sub-adaptor B2 may be rotatably connected to the connecting piece 2022 through the first rotation shaft 2023 in the limiting groove a 3. In this case, by providing the limiting groove a3 at the end of the connecting piece 2022 near the adapting piece 2021, after the two second sub-frames 201 in one second folded frame 200 are unfolded, the second sub-adapting piece B2 may abut against the side wall of the limiting groove a3 to limit the two second sub-frames 201 in this position.

Optionally, after the two adapters 2021 in the second rotating mechanism 202 drive the two second sub-frames 201 to be unfolded around the second axis L2, the two adapters 2021 can rotate synchronously between the two second sub-frames 201 in one second folded frame 200, as shown in fig. 3, so that the axis F1 of the first rotating shaft 2023 may be parallel to the second axis L2, or the axis F1 of the first rotating shaft 2023 may be parallel to the third axis L3. By providing two adapters 2021 in the second rotation mechanism 202, which are rotatably connected to the first ends of the two second sub-frames 201, respectively, and providing a connecting member 2022 between the two adapters 2021. Thus, one of the adaptor 2021 and the connector 2022 rotates through the first shaft 2023, and the other adaptor 2021 and the connector 2022 also rotate through the first shaft 2023, and the two second sub-frames 201 can rotate relatively under the action of the third rotation mechanism 300. And through the rotational connection of the adaptor 2021 with the first end of the second sub-frame 201, the two adaptor 2021 can rotate synchronously between the two second sub-frames 201 (for example, can rotate 90 degrees relative to the second sub-frame). For example, please refer to fig. 11, fig. 11 is a schematic diagram illustrating a folding effect of another screen frame according to an embodiment of the present application. During the actual use of the screen frame 000, the two second sub-frames 201 in the second folded frame 200 may be folded through the interaction of the adaptor 2021, the first rotation shaft 2023, the connecting piece 2022 and the third rotation mechanism 300; the two second sub-frames 201 in the other second folded frame 200 can be folded by the third rotating mechanism 300, and the size of the screen frame 000 can be effectively reduced after folding, so that the screen frame is convenient to transport and enter a user. After the folded screen frame 000 is taken home, the user may rotate the interconnected second sub-adaptor B2, first rotation shaft 2023, and connection member 2022 by a certain angle (e.g., 90 degrees) with respect to the first sub-adaptor B1 through the second rotation shaft B3; then, each of the adapters 2021 is rotated relative to the connection element 2022 by the first rotation shaft 2023, so that the two second sub-frames 201 of the second folded frame 200 can be integrally folded along the direction perpendicular to the bearing surface of the screen frame 000. It should be noted that, after the second sub-adaptor B2, the first shaft 2023 and the connecting element 2022 connected to each other are rotated by a certain angle (for example, rotated by 90 degrees) relative to the first sub-adaptor B1 through the second shaft B3, the second sub-frame 201 is then rotated relative to the connecting element 2022 through the first shaft 2023 by the adaptor 2021 to perform folding. The folded screen frame 000 is in a suitable state for assembly of the flexible curtain, facilitating assembly of the flexible curtain with the screen frame in the projection screen. And after the flexible curtain and the screen frame are assembled, the folded screen frame 000 is flattened, and the flexible curtain with certain elasticity can be driven to be tensioned. It should be noted that the structure and the movement principle of the two adapters 2021 in the second rotation mechanism 202 are the same, and detailed descriptions thereof are omitted herein.

In an embodiment of the present application, please refer to fig. 12 and fig. 13, fig. 12 is a schematic diagram of a connection between a first sub-frame and a first limiting member provided in an embodiment of the present application, and fig. 13 is a schematic diagram of a connection between a second sub-frame and a second limiting member provided in an embodiment of the present application. Each of the first folding border 100 in the screen frame may further include: the first limiting member 103 may be rotatably connected to the first end of one first sub-frame 101 of the two first sub-frames 101 of each first folded frame 100, and detachably connected to the first end of the other first sub-frame 101. And/or, each of the second folding borders 200 in the screen frame may further include: the second limiting piece 203 may be rotatably connected to the first end of one second sub-frame 201 of the two second sub-frames 201 of each second folded frame 200, and detachably connected to the first end of the other second sub-frame 201. It should be noted that, in the embodiment of the present application, each first folded frame 100 includes the first limiting member 103, and each second folded frame 200 includes the second limiting member 203. Taking the first limiting part 103 as an example, after the two first sub-frames 101 are unfolded, the first limiting part 103 rotates to the position of the other first sub-frame 101 relative to one first sub-frame 101, and the two first sub-frames 101 are limited in a coplanar position by adopting the first limiting part 103, so that the two first sub-frames 101 are prevented from rotating relatively. When the screen frame needs to be folded, the first limiting part 103 can be separated from one of the first sub-frames 101, so that the two first sub-frames 101 can rotate relative to the first rotating mechanism 102. It should be noted that the working principle of the second limiting member 203 is the same as that of the first limiting member 103, and will not be described herein.

Alternatively, referring to fig. 14 and 15, fig. 14 is a schematic diagram illustrating connection between a second limiting member and a second sub-frame according to another embodiment of the present application, and fig. 15 is a schematic diagram illustrating connection between the second limiting member and two second sub-frames shown in fig. 14. The first end of the other first sub-frame 101 of the two first sub-frames 101 of each first folding frame 100 may have a first elastic protrusion (not shown), and the first stopper 103 may have a first clamping groove (not shown) engaged with the first elastic protrusion. And/or, the first end of the other second sub-frame 201 of each second folded frame 200 may have a second elastic protrusion 201a, and the second stopper 203 may have a second clamping groove 203a engaged with the second elastic protrusion 201 a. It should be noted that, in the embodiments of the present application, the first sub-frame 101 and the second sub-frame 201 each have an elastic protruding portion as an example for illustration. Taking the second elastic protruding portion 201a as an example, after the second limiting piece 203 rotationally connected with one second sub-frame 201 rotates to the other second sub-frame 201, the second clamping groove 203a on the second limiting piece 203 may be clamped with the second elastic protruding portion 201a, so as to achieve limiting of the second limiting piece 203 on the two second sub-frames 201. It should be noted that the action principle of the first elastic protruding portion and the first clamping groove and the action principle of the second elastic protruding portion 201a and the second clamping groove 203a are the same, and are not described herein again.

In the embodiment of the present application, please refer to fig. 16, fig. 16 is a schematic diagram of a third rotation structure according to an embodiment of the present application. The third rotation mechanism 300 in the screen frame 000 may include: a first fixing member 301 and a second fixing member 302, and a third rotation shaft 303 rotatably connected to the first fixing member 301 and the second fixing member 302, respectively. The first fixing member 301 may be fixedly connected to the second end of a first sub-frame 101, and the second fixing member 302 may be fixedly connected to the second end of a second sub-frame 201. The axis F3 of the third rotating shaft 303 in the third rotating mechanism 300 may be perpendicular to the bearing surface of the screen frame 000 (i.e., the axis F3 of the third rotating shaft 303 is parallel to the fourth axis L4). In this case, by providing the first fixing member 301, the second fixing member 302, and the third rotation shaft 303 in the third rotation mechanism 300, the first fixing member 301 is fixedly connected to the second end of one of the first sub-frames 101, and the second fixing member 302 is fixedly connected to the second end of one of the second sub-frames 201. In this way, when the second folded frame is folded, the two adjacent first sub-frames 101 and the second sub-frame 201 are disposed, and the second sub-frame 201 can rotate relative to the first sub-frame 101 through the third rotation shaft 303. In the present application, the two first folding frames 100 and the two second folding frames 200 disposed opposite to each other generally need four third rotating mechanisms 300 to be connected, and the four third rotating mechanisms 300 may be located in an area surrounded by the flattened screen frame (i.e., rectangular frame). After the bearing surface in the screen frame bears the flexible curtain, the appearance effect of the projection screen is not affected. It should be noted that, the third rotation mechanism 300 may have other structures besides the above-described structure, which is not particularly limited in the embodiment of the present application.

Optionally, referring to fig. 1 and 17, fig. 17 is a schematic structural diagram of a first rotating mechanism according to an embodiment of the present application. The first rotation mechanism 102 in each first folding frame 100 may include: two blades 1021 fixedly connected to the first ends of the two first sub-frames 101, respectively, and a rotation shaft 1022 located between the two blades 1021 and rotatably connected to the two blades 1021, respectively. The two blades 1021 may be connected by a rotation shaft 1022 relatively rotatably, and an axis F4 of the rotation shaft 1022 may be parallel to the first axis L1. In this case, by fixedly connecting the two blades 1021 in the first rotation mechanism 102 to the first ends of the two first sub-frames 101, respectively. In this way, the two first sub-frames 101 can be relatively rotated by the two blades 1021 and the rotation shaft 1022.

In summary, the embodiment of the present application provides a screen frame, which may include: the device comprises two first folding frames which are oppositely arranged, two second folding frames which are oppositely arranged and a third rotating mechanism. Two first sub-frames of each first folding frame in the screen frame can rotate around a first axis through a first rotating mechanism to fold, and two second sub-frames of one second folding frame can rotate around a second axis through a second rotating mechanism and rotate relative to the first sub-frames through a third rotating mechanism. In this manner, the individual components of the screen frame can be assembled to form an overall frame (i.e., a rectangular frame) before the screen frame enters the user's residence. The two second sub-frames are rotated relatively through the second rotating mechanism, and can be folded after being rotated relatively to the first sub-frames through the third rotating mechanism. The distance between the two first folding frames can be shortened after folding, so that the overall size of the rectangular frame is smaller. In addition, after the size of the rectangular frame in the length direction of the second folding frame is reduced, the first frame and the second frame in the rectangular frame can be rotated relatively through the first rotating mechanism, so that the folding frame is formed, and the overall size of the rectangular frame is further reduced. In addition, after the second folded frame is folded between the two first folded frames through the third rotating mechanism and the first folded frames are folded through the first rotating mechanism, the first ends of the two second sub-frames in the other second folded frame are separately arranged. Therefore, the second rotating mechanism can further drive the second sub-frame to rotate around the third axis to fold, so that the overall size of the rectangular frame after folding is further reduced, and the transportation difficulty of the screen frame can be effectively simplified. After the screen frame is integrated in the projection screen, the transportation difficulty of the projection screen can be effectively simplified.

In the related art, the screen frame is usually required to be disassembled into a plurality of small parts for transportation to the home of the user, and then the plurality of parts are required to be assembled, and a plurality of tensioning mechanisms (e.g., springs) are required to tension the flexible curtain. In this way, more components are integrated in the projection screen and result in higher costs for the projection screen.

The embodiment of the application also provides a projection screen, please refer to fig. 18, fig. 18 is an exploded schematic view of the projection screen according to the embodiment of the application. Projection screen 00 can include: flexible curtain 001 and screen frame 000, flexible curtain 001 can laminate on the loading surface of screen frame 000. The screen frame 000 may be any one of the screen frames given above. In this way, the screen frame 000 in the projection screen 00 can be conveniently transported after being reduced in size by folding, and the screen frame 000 can be folded to a state convenient for assembling the flexible curtain 001 by the cooperation of the three rotating mechanisms in the screen frame 000 after entering a user. In this way, after the flexible curtain 001 is assembled to the screen frame 000, the flexible curtain 001 is flattened by expanding the screen frame 000 in combination with the elastic deformation of the flexible curtain 001 itself. The flatness of the flexible curtain 001 can be ensured, the material cost of the projection screen 00 is reduced, the assembly process of a user is simplified, the assembly time is saved, and the use experience of the user is improved.

For example, please refer to fig. 19, fig. 19 is an exploded schematic view of a flexible curtain according to an embodiment of the present application. The flexible curtain 001 may include: the curtain sheet D1 and the flexible carrier D2, the curtain sheet D1 may be fixed at one side of the flexible carrier D2, and edges of the flexible carrier D2 extend out of four sides of the curtain sheet D1. The other side of the flexible carrier D2 may be attached to the front surface of the rectangular frame a, and the edge of the flexible carrier D2 is folded to wrap the edge of the rectangular frame a. The curtain sheet D1 may be an optical film, which is used in cooperation with the projection host. The projection host is used for emitting a light beam to the optical film, and the optical film is used for receiving and reflecting the light beam to display a picture. The curtain sheet D1 may be fixed to the flexible carrier D2 by means of adhesion.

Alternatively, referring to fig. 20 and 21, fig. 20 is an exploded view of another projection screen according to an embodiment of the present application, and fig. 21 is a cross-sectional view of a sub-frame of the screen frame shown in fig. 20. Projection screen 00 can further comprise: the plurality of support rods 002, one side of the screen frame 000 facing away from the bearing surface may have a bearing cavity Q1, and an opening k1 communicating with the bearing cavity Q1. The edge portion of the flexible curtain 001 in the projection screen 00 wraps the edge of the screen frame 000 and is connected with the support rods 002, and each support rod 002 can be clamped into the bearing cavity Q1 through an opening k1 communicated with the bearing cavity Q1. In this case, the support rod 002 can be clamped into the bearing cavity Q1 after being connected with the edge portion of the flexible curtain 001, and when the screen frame 000 is flattened to flatten the flexible curtain 001, the bearing cavity Q1 on the screen frame 000 can play a limiting role on the support rod 002 to assist in tensioning the flexible curtain 001. In the present application, please refer to fig. 22, fig. 22 is a schematic diagram illustrating an installation of a support bar according to an embodiment of the present application. The corner of the side of the screen frame 000 facing away from the carrying surface may have a notch groove Q2 communicating with the carrying chamber Q1, and the notch groove Q2 may be used for the support bar 002 penetrating into the carrying chamber Q1 in the arrow direction in the drawing to be connected with the edge portion of the flexible curtain 001 located in the carrying chamber Q1. In the present application, as shown in fig. 21, the carrying chamber Q1 in the screen frame 000 may include: the first sub-carrying cavity Q11 and the second sub-carrying cavity Q12 are communicated with each other, the first sub-carrying cavity Q11 is closer to the carrying surface of the screen frame 000 than the second sub-carrying cavity Q12, and the width of the first sub-carrying cavity Q11 is larger than that of the second sub-carrying cavity Q12. In this way, the support rod 002 is easily installed into the bearing chamber Q1.

For example, please refer to fig. 23, fig. 23 is a schematic diagram illustrating an installation of a flexible curtain and a screen frame according to an embodiment of the present application. The assembly and tensioning process of the screen frame 000 and flexible curtain 001 is schematically illustrated herein:

first, after the screen frame 000 is taken home, the screen frame 000 is folded to a proper state for easy installation of the flexible curtain 001.

In the present application, the flexible curtain 001 is mounted and tensioned by folding and unfolding the screen frame 000. For this reason, the size of the flexible carrier D2 (i.e., the synthetic cloth) in the flexible curtain 001 is generally smaller than the size of the screen frame 000 when it is flattened, i.e., the width of the synthetic cloth is smaller than the distance between the outer sides of the two first folded rims 100 in the rectangular frame, and the length of the synthetic cloth is smaller than the distance between the outer sides of the two second folded rims 200 in the rectangular frame. In this way, the curtain sheet D1 can be tensioned by the elastic deformability of the synthetic cloth itself after the rectangular frame is flattened.

Then, the accommodating pocket Q3 at the edge portion of the flexible curtain 001 (i.e., the accommodating pocket provided at the edge portion of the synthetic fabric) is placed into the first sub-carrying cavity Q11.

Afterwards, the support rod 002 extends into the first sub-carrying cavity Q11 through the notch groove Q2 and penetrates into the accommodating pocket Q3.

Then, the screen frame 000 can be adjusted to be gradually flattened, and in the flattening process, the support rod 002 gradually moves from the first sub-bearing cavity Q11 to the second sub-bearing cavity Q12, and is in interference fit with the second sub-bearing cavity Q12. It should be noted that, here, the screen frame 000 may still have a certain flattened space.

Then, the screen frame 000 continues to be flattened, and the synthetic cloth in the flexible curtain 001 generates certain elastic deformation to drive the curtain sheet D1 to tension, so as to complete the assembly of the projection screen 00. As can be seen from the above, in the embodiment of the present application, the flexible curtain is assembled with the screen frame when the screen frame is unfolded to a certain extent (where the screen frame is not completely unfolded). Thus, the flexible curtain can be tensioned by the residual expansion amount of the screen frame without adopting other parts to assist in tensioning the flexible curtain, and the screen frame can be flattened.

In the embodiment of the present application, the plurality of sub-frames in the screen frame 000 may have the carrying cavity Q1, and the plurality of support rods 002 may correspond to the plurality of sub-frames one by one. Each support rod 002 is connected to an edge portion of the flexible curtain 001 (e.g., the edge portion of the flexible curtain may have a receiving pocket in which the support rod may be located) and then is clamped into the bearing cavity Q1 in the corresponding sub-frame. For example, the two first sub-frames 101 in each first folding frame 100 may have a carrying cavity Q1, and the plurality of support rods 002 in the projection screen 00 include two support rods 002 corresponding to the carrying cavities Q1 of the two first sub-frames 101 one by one; the two second sub-frames 201 in each second folded frame 200 may have a carrying cavity Q1, and the plurality of support rods 002 in the projection screen 00 further includes two support rods 002 corresponding to the carrying cavities Q1 of the two second sub-frames 201 one by one.

In an embodiment of the present application, in order to ensure stability of the flexible curtain 001 to the screen frame 000 after the flexible curtain 001 is attached to the screen frame 000. Referring to fig. 24, fig. 24 is a schematic view of a portion of a projection screen according to an embodiment of the application. Projection screen 00 can further comprise: angle 005 connected to the second end of the first sub-frame 101 and the second end of the second sub-frame 201. After the screen frame 000 is flattened, the angle iron 005 may be fixedly connected to the second end of the first sub-frame 101 and the second end of the second sub-frame 201, respectively, and when the second sub-frame 201 in the screen frame 000 is folded, the angle iron 005 may be separated from the second end of the second sub-frame 201. In order to ensure that the corner of the second sub-frame 201 does not interfere with the corner of the first sub-frame 101 and the angle iron 005 when the second sub-frame 201 rotates relative to the first sub-frame 101. The angle 005 may have an avoidance region 0051, where the avoidance region 0051 is configured to avoid a rotation region of the first sub-frame 101 and the second sub-frame 201 when the two sub-frames rotate relative to each other.

In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.

Claims (10)

1. A screen frame, wherein the screen frame has a bearing surface, and the screen frame comprises:

two first folding frames of relative setting, every first folding frame includes: the first ends of the two first sub-frames are connected through the first rotating mechanism, and the first rotating mechanism is used for driving the two first sub-frames to fold or unfold around a first axis parallel to the bearing surface;

two second folding frames of relative setting, every the second folding frame includes: the first ends of the two second sub-frames in one second folded frame are connected through a second rotating mechanism, and the first ends of the two second sub-frames in the other second folded frame are arranged separately; the second rotating mechanism is used for driving two second sub-frames in one second folding frame to fold or unfold around a second axis intersecting the bearing surface, and driving the two second sub-frames in one second folding frame to rotate around a third axis parallel to the bearing surface and perpendicular to the first axis;

And a third rotating mechanism for connecting the second end of the first sub-frame and the second end of the second sub-frame, wherein the third rotating mechanism is used for driving the second sub-frame to rotate around a fourth axis perpendicular to the bearing surface relative to the first sub-frame.

2. The screen frame of claim 1, wherein the second rotation mechanism comprises: the two connecting pieces are respectively connected with the first ends of the two second sub-frames in a rotating way, and the connecting piece is positioned between the two connecting pieces, and the end part, deviating from the second sub-frames, of each connecting piece is connected with the connecting piece in a rotating way through a first rotating shaft;

when the axial lead of the first rotating shaft is parallel to the second axis, the two adapter pieces can drive the two second sub-frames to fold or unfold around the second axis, and after the two adapter pieces drive the two second sub-frames to fold around the second axis, the axial lead of the adapter piece is parallel to the third axis, and each adapter piece can rotate around the axial lead of the adapter piece relative to the connecting piece.

3. The screen frame of claim 2, wherein the adapter comprises: the first sub-adaptor of first end fixed connection with the second sub-frame, with the second sub-adaptor of connecting piece rotation connection, and be located first sub-adaptor with second pivot between the second sub-adaptor, the one end of second pivot with first sub-adaptor deviates from the tip fixed connection of second sub-frame, the other end of second pivot with second sub-adaptor rotates to be connected, just the axial lead of second pivot with the axial lead of first pivot is perpendicular.

4. A screen frame as claimed in claim 3, wherein the end of the second sub-adaptor adjacent to the second rotating shaft is provided with a connecting hole, the side wall of the second sub-adaptor is provided with a limit chute communicated with the connecting hole, and at least part of the second rotating shaft is positioned in the connecting hole;

the adapter further comprises: and one end of the limiting column penetrates through the limiting sliding groove and is fixedly connected with the second rotating shaft.

5. A screen frame as claimed in claim 3, wherein the end of the connector adjacent to the adaptor has a limit groove, and the second sub-adaptor is connected to the connector via the first shaft in the limit groove.

6. The screen frame of any one of claims 2 to 5, wherein after the two adapters drive the two second sub-frames to be unfolded around the second axis, the two adapters can synchronously rotate between the two second sub-frames so as to make the axis of the first rotating shaft parallel to the second axis or make the axis of the first rotating shaft parallel to the third axis.

7. The screen frame of any one of claims 1 to 5, wherein each of the first folding bezel further comprises: the first limiting piece is rotationally connected with the first end of one first sub-frame of the two first sub-frames and is detachably connected with the first end of the other first sub-frame;

And/or, each of the second folded frames further comprises: the second limiting piece is rotationally connected with the first end of one second sub-frame of the two second sub-frames and is detachably connected with the first end of the other second sub-frame.

8. The screen frame of claim 7, wherein a first end of the other first sub-frame has a first elastic protrusion, and the first stopper has a first clamping groove that mates with the first elastic protrusion;

and/or the first end of the other second sub-frame is provided with a second elastic protruding part, and the second limiting piece is provided with a second clamping groove matched with the second elastic protruding part.

9. A projection screen, comprising: a screen frame and a flexible curtain, wherein the flexible curtain is attached to a bearing surface of the screen frame, and the screen frame is the screen frame of any one of claims 1 to 8.

10. The projection screen of claim 9, wherein the projection screen further comprises: a plurality of support bars;

one side of the screen frame, which is away from the bearing surface, is provided with a bearing cavity and an opening communicated with the bearing cavity;

The edge part of the flexible curtain wraps the edge of the screen frame and then is connected with the support rods, and each support rod is clamped into the bearing cavity through the opening.