CN115774374A - Projection screen device - Google Patents

Abstract

The embodiment of the application provides a projection screen device, and relates to the technical field of projection screens. The projection screen apparatus includes a projection screen and a lift support assembly. The projection curtain includes curtain body and winding assembly, and winding assembly includes the adsorption plane, and the curtain body is located one side that winding assembly has the adsorption plane, and can adsorb with winding assembly's adsorption plane and be connected. The lifting support component is connected to one side of the projection curtain, which deviates from the curtain body, and the extension end of the lifting support component is connected with the projection curtain, so that the driving end drives the extension end to lift and simultaneously drives the projection curtain to ascend or descend. When the projection curtain is in an unfolding state under the action of the lifting support assembly, the curtain body is connected with the winding assembly in an adsorption mode and is in a plane. The projection screen device is convenient and reliable to unfold and fold, has good flatness in the unfolded state, and is beneficial to improving the projection display effect.

Description

Projection screen device

Technical Field

The application belongs to the technical field of projection screens, and particularly relates to a projection screen device.

Background

The projection screen is used in the occasions such as movies, offices, home theaters, large conferences and the like, and is used for displaying pictures projected by the projection equipment, so that files such as images, videos and the like can be presented.

As the size of projection screens has increased, the popularity of projector screens of the rollable type has increased. The foldable projection screen includes a conventional electric screen (fixed at the upper end and extending from top to bottom), a floor-pulling screen, and the like. When the user is not using, because the projection screen of the coiling type can coil to less size, not only can save space, conveniently carry and carry moreover.

However, although the conventional electric screen or floor-pulling screen has a simple structure, the conventional electric screen or floor-pulling screen generally only provides up-and-down tension, so that the projection screen is easy to warp, wave, wrinkle and the like, and the display effect of the projection screen is not ideal. Especially for ultra-short-focus projection screens, extremely high requirements are imposed on the smoothness of the screens, so that the existing projection screens cannot meet the actual use requirements.

Disclosure of Invention

An object of the present application includes, for example, providing a projection screen apparatus to ameliorate at least some of the problems.

The embodiment of the application can be realized as follows:

a projection screen assembly is provided that includes a projection screen and a lift support assembly. The projection curtain includes curtain body and winding assembly, and winding assembly includes the adsorption plane, and the curtain body is located one side that winding assembly has the adsorption plane, and can adsorb with winding assembly's adsorption plane and be connected. The lifting support component is connected to one side of the projection curtain, which deviates from the curtain body, and comprises a relative driving end and an extension end, and the extension end is connected with the projection curtain so as to drive the projection curtain to ascend or descend when the extension end ascends or descends. When the projection curtain is in the expansion state under the effect of lift supporting component, the curtain body adsorbs with the adsorption plane of winding component and is connected, and presents for the plane, when the projection curtain is in the rolling state under the effect of lift supporting component, the curtain body is convoluteed to the column structure.

Further, the winding assembly comprises a relative connecting end and a winding end, the lifting support assembly comprises a cross beam, the connecting end of the winding assembly is connected with the cross beam, and the connecting end can be wound through the winding end.

Furthermore, the winding assembly comprises a plurality of winding bodies which are connected in sequence, the adsorption surface is positioned on one side of each winding body, and when the projection curtain is in an unfolded state under the action of the lifting support assembly, the winding bodies are connected in sequence and positioned on the same plane; when the projection curtain is in a rolling state under the action of the lifting support assembly, the winding body is columnar.

Further, the winding assembly still includes articulated elements and spacing retaining member, and the body of convoluteing all is provided with first articulated portion along width direction's both sides, and the articulated elements all is provided with the second articulated portion with first articulated portion looks adaptation along width direction's both sides, and the articulated elements wears to locate between two adjacent bodies of convoluteing, and articulates through first articulated portion and second articulated portion, and spacing retaining member connects in the tip of articulated elements, and is used for preventing to convolute the body dislocation when changing between expansion state and rolling state.

Furthermore, the first hinge portion comprises a limiting support lug and a rotary guide arc, the rotary guide arc is bent towards one side of the limiting support lug, a gap is formed between the limiting support lug and the rotary guide arc to form a first hinge hole with an opening, and the second hinge portion comprises a hook which is inserted into the first hinge hole.

Further, the crotch includes curved arc portion and straight face, and straight face is located the medial surface of curved arc portion and is close to the border position in curved arc portion, and straight face is used for and spacing journal stirrup phase-match, and curved arc portion is used for leading the arc phase-match with the rotation.

Further, the winding body further comprises a supporting main body, the first hinge parts are located on two sides of the supporting main body in the width direction, and the supporting main body is of a hollow structure.

Further, the winding assembly further comprises a connecting piece and a limiting piece, the plurality of winding bodies are sequentially connected end to form the winding body, the winding body comprises an intermediate section assembly and end parts connected to two ends of the intermediate section assembly, the connecting piece is connected between the end parts and the intermediate section assembly, and the limiting piece is arranged in a penetrating mode and connected with the winding body.

Further, the winding assembly further comprises a limiting screw, the plurality of winding bodies are sequentially connected end to form a winding body, the limiting screw is connected to the connecting positions of the two adjacent winding bodies and located at the two ends of the winding bodies in the length direction, and the limiting screw is used for limiting the two adjacent winding bodies in the length direction.

Further, the coiling body includes third articulated portion, support main part and the fourth articulated portion that sets gradually along width direction, and third articulated portion is provided with the coiling axle along the length direction of coiling body, and the connecting hole has been seted up along the axial to the coiling axle, and the fourth articulated portion is seted up along the length direction of coiling body with coiling axle assorted constant head tank. Two adjacent coiling bodies include first coiling body and second coiling body, and the constant head tank of locating the second coiling body is inserted to the coiling axle of first coiling body, and stop screw connects in the connecting hole for carry on spacingly to the coiling axle of first coiling body and the third hinge joint portion of second coiling body along length direction.

Further, a winding gap is provided between the fourth hinge portion of the second winding body and the support main body of the first winding body.

Further, the fourth hinge portion includes a first arc portion and a second arc portion, the first arc portion protrudes from the second arc portion in the width direction of the winding body, and the first arc portion and the second arc portion enclose the positioning groove. A winding gap is formed between the second arc-shaped part of the second winding body and the supporting main body of the first winding body, and the first arc-shaped part of the second winding body abuts against the supporting main body of the first winding body so as to limit the winding direction of the winding assembly.

Further, the support body includes a recess near one end of the third hinge, the recess cooperating with the first arc.

Further, stop screw includes relative link and butt end, and the link is provided with the external screw thread with connecting hole threaded connection, and the butt end is round platform column structure, and includes first butt portion and the second butt portion that is located first butt portion periphery, and first butt portion includes first terminal surface, and second butt portion includes the second terminal surface. The connecting end is connected to the connecting hole, the first end face abuts against the end face of the winding shaft, and the second end face corresponds to the end face of the fourth hinge portion and is provided with a preset gap.

Further, lift supporting component still includes slide rail, scissors frame and power component, and the scissors frame includes drive end and extension end, and the drive end is connected in the slide rail along first direction slidable, and extension end is connected in the crossbeam along first direction slidable, and power component is connected with the drive end transmission, and drives the scissors frame and open or receive to close. When the scissors frame is folded, the scissors frame drives the beam to rise along a second direction which has an included angle with the first direction so as to enable the extension end and the driving end to be away from each other, and when the scissors frame is unfolded, the scissors frame drives the beam to fall along the second direction so as to enable the extension end and the driving end to be close to each other.

Further, the power assembly comprises a first driving piece and a screw rod which are in transmission connection, the first driving piece drives the screw rod to rotate, a sliding block is arranged at the driving end, and the sliding block is in transmission connection with the screw rod and slides along a first direction along with the rotation of the screw rod.

Further, still including preventing the mechanism that leans forward, prevent that the mechanism that leans forward is located the one side that deviates from the projection curtain of lift supporting component, prevent that the mechanism that leans forward includes the tensioning piece, the tensioning piece has relative stiff end and tensioning end, stiff end and lift supporting component's extension end fixed connection, the tensioning end can be rolled up or relax to when making lift supporting component be in the expansion state, the tensioning piece can continuously be in the tensioning state.

Furthermore, prevent mechanism that leans forward still includes first winding mechanism, and first winding mechanism includes first guiding axle, first spool and second driving piece, and the tensioning end of tensioning piece is connected with first spool around locating behind the first guiding axle, and the second driving piece is connected with first spool transmission. When the lifting support assembly is converted into a rolling state from an unfolding state, the second driving piece rotates along the first rotating direction, and the fixed end of the tensioning piece moves towards the tensioning end to enable the tensioning piece to be rolled; when the lifting support component is converted into the unfolding state from the rolling state, the second driving piece rotates along a second rotating direction opposite to the first rotating direction, the fixed end of the tensioning piece is far away from the tensioning end, and the tensioning piece is in a continuous tensioning state.

Furthermore, the projection curtain still includes second winding mechanism, and second winding mechanism includes second guiding axle, second spool and third driving piece, and the curtain body includes relative fastening end and winding end, and the fastening end is connected with lift supporting component's extension end, and winding end is connected with the second spool after locating the second guiding axle, and the third driving piece is connected with the transmission of second spool, and the third driving piece is used for the rolling or expands the curtain body.

Furthermore, the projection curtain also comprises a third winding mechanism, the third winding mechanism comprises a fourth driving part, a third scroll and at least one third guide shaft, the winding end of the winding assembly is wound on the third guide shaft and then connected with the third scroll, the fourth driving part is in transmission connection with the third scroll, and the fourth driving part is used for winding or unwinding the winding assembly.

Further, the curtain body is including the diaphragm layer, adhesive linkage and the substrate layer that connect gradually, and the substrate layer is close to the adsorption plane setting of coiling subassembly, and the substrate layer can be connected with the adsorption plane absorption of coiling subassembly.

Further, the curtain body includes the screen display region and is located the fixed area of screen display region circumference, and fixed area is provided with the adsorbed layer to make the curtain body pass through fixed area and be connected with the absorption of winding assembly.

Further, the adsorption layer comprises magnetic glue, ferrous rubber or a ferrous coating.

Further, the curtain body still includes the buffer layer, and the buffer layer is located between adhesive linkage and the substrate layer, and perhaps, the buffer layer is located the one side that deviates from the adhesive linkage of substrate layer.

Further, the curtain body still includes the buffer layer, and the buffer layer is located the one side that deviates from the adhesive linkage of substrate layer, and the buffer layer includes a plurality of buffering strips, and buffering strip sets up along the interval in proper order of first direction, and the absorption face of buffering strip and winding assembly adsorbs to be connected. The curtain body comprises a fastening end and a winding end which are opposite, wherein the first direction is a direction from the fastening end to the winding end.

Furthermore, one of the substrate layer and the winding assembly is made of magnetic glue, and the other is made of iron material capable of being connected with the magnetic glue in an adsorption mode.

The projection screen device that this application embodiment provided adopts the magnetism mode of inhaling to be connected through curtain body and winding assembly, and winding assembly can expand and receive under lifting support assembly's drive. When the winding assembly is in the unfolding state, the adsorption surface of the winding assembly can form an integral plane for supporting the curtain body. And when the curtain body adsorbs on the adsorption plane of winding assembly, the curtain body also can present for the plane state, is favorable to improving the roughness of curtain body, can promote the projection display effect.

And this projection screen device can roll up and expand, can be when needs transport or transportation, converts the rolling state into, reduces the volume, convenient transport. When the projection display device is used, the projection display device is required to be converted into an unfolded state, and the flatness of the unfolded state is high, so that the use requirement of projection display is met.

The projection curtain is driven to be switched between the unfolding state and the folding state through the lifting support assembly, so that the operation is convenient and reliable, and the popularization is easy.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a projection screen apparatus according to an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of a projection screen assembly according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of the projection screen of FIG. 2;

FIG. 4 is a partial schematic view of a projection screen apparatus according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of the curtain body in FIG. 3;

FIG. 6 is a schematic view of the curtain body from another perspective;

FIG. 7 is a schematic structural view of another structure of the curtain body;

FIG. 8 is a schematic view of another structure of the curtain body;

FIG. 9 is a schematic view of another structure of the curtain body;

FIG. 10 is a schematic view of the winding assembly of FIG. 3;

FIG. 11 is a schematic view of the structure of the wound body of FIG. 10;

FIG. 12 is a schematic view of the hinge of FIG. 10;

FIG. 13 is a schematic view of the winding assembly of FIG. 3 from another perspective;

FIG. 14 is a schematic diagram illustrating another exemplary winding assembly of a projection screen apparatus according to an embodiment of the present disclosure;

FIG. 15 is a schematic view from a first perspective of a third configuration of a winding assembly;

FIG. 16 is a schematic view from a second perspective of a third configuration of the winding assembly;

FIG. 17 is a schematic view of the structure of the wound body;

FIG. 18 is a schematic view of another configuration of the wound body;

FIG. 19 is a schematic view of the winding assembly;

FIG. 20 is a first perspective view of the retaining lock;

FIG. 21 is a second perspective view of the retaining member;

FIG. 22 is a schematic structural diagram of a lifting support assembly of a projection screen apparatus according to an embodiment of the present disclosure;

fig. 23 is a schematic structural view of a forward tilt prevention mechanism in a projection screen apparatus according to an embodiment of the present application;

fig. 24 is a schematic structural view of a second winding mechanism connected to a curtain body in a projection screen apparatus according to an embodiment of the present disclosure;

fig. 25 is a schematic structural diagram of a third winding mechanism connected to a winding assembly in a projection screen device according to an embodiment of the present disclosure.

Icon: 001-first direction; 100-projection screen device; 110-projection screen; 112-curtain body; 1120-a membrane layer; 1122-adhesive layer; 1124-substrate layer; 1125-buffer layer; 1126-a screen display area; 1128-fixed area; 113-buffer bar; 1132 — a fastening end; 1135-winding end; 114-a winding assembly; 1140-a connecting end; 1142-rolling end; 1144-an adsorption surface; 115-a wound body; 1150-a support body; 1151-a first wound body; 1152-a first hinge; 1153-a second wound body; 1154-limit lugs; 1155-the winding gap; 1156-rotating pilot arc; 1157-a third hinge; 1158-a fourth hinge; 1159-a recess; 116-a hinge; 1160-hinge body; 1162-a through hole; 1164-a second hinge; 1165-winding shaft; 1166-connecting hole; 1167-positioning slot; 1168-a first arc; 1169-a second arc; 117-limit locking member; 1172-a connecting end; 1174-a butt joint end; 1175-a first abutment; 1176-a first end face; 1177-a second abutment; 1178-a second face; 1179-interference free; 1182-connectors; 1185-a limiter; 119-a cross beam; 120-a lift support assembly; 1201-a drive end; 1205-an extension; 122-a slide rail; 124-a scissor rack; 126-a screw rod; 128-a slide block; 130-a forward lean prevention mechanism; 131-a tensioning member; 133-a first guide shaft; 135-a first reel; 137-a second driving member; 141-a second guide shaft; 142-a second reel; 144-a third drive member; 146-a third guide shaft; 148-third reel; 149-a fourth drive; 150-outer shell.

Detailed Description

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 clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.

The projection screen is used in cooperation with the projection equipment and is used for displaying pictures projected by the projection equipment, so that files such as images and videos can be presented, the display effect of the projection equipment is improved, and the projection screen is an indispensable component in a projection system.

At present, projection screens can be applied to movie theaters, offices, home theaters, large conference rooms and other occasions. As the size of the projection screen increases, it becomes difficult to transport and handle the projection screen.

To improve the problem of transportation or handling, a projection screen of a rollable type may be used. When the projection screen needs to be carried or is not used by a user, the foldable projection screen can be folded to a smaller size, so that the space can be saved, and the projection screen is convenient to carry and carry.

Currently, the retractable projection screen may include a motorized screen (top fixed, deployed from top to bottom), a floor-mounted screen, etc.

However, although the conventional electric screen or floor-pulling screen has a simple structure, it generally provides only vertical tension, so that the projection screen is prone to warp, wave, wrinkle, and the like, and the display effect of the projection screen is not ideal. Especially for ultra-short-focus projection screens, the requirement on the flatness of the screen is very high, so that the existing projection screens cannot meet the actual use requirement.

In view of the above problems, the embodiment of the present application provides a projection screen device 100.

Referring to fig. 1, a schematic structural diagram of a projection screen device 100 according to an embodiment of the present disclosure is shown. The projection screen device 100 is used for displaying an image projected by a projection apparatus, and can be lifted and lowered to have an expanded state and a collapsed state.

Specifically, referring to fig. 1 and fig. 2 together, fig. 2 is a cross-sectional view of a projection screen apparatus 100 according to an embodiment of the present disclosure.

The projection screen apparatus 100 can include a projection curtain 110, a lift support assembly 120, and a housing 150. The housing 150 is located at the bottom of the product and is used to contain the product in a collapsed state. The projection curtain 110 is used for displaying images projected by the projection device, and the lifting support component 120 can be used as a power source to drive the projection curtain 110 to rise or fall. Meanwhile, the lifting support assembly 120 can also provide a certain support function for the projection curtain 110 in the unfolded state.

Referring to fig. 3, an exploded view of a projection curtain 110 of the projection screen apparatus 100 according to an embodiment of the disclosure is shown.

The projection curtain 110 can include a curtain body 112 and a take-up assembly 114. Taking the user's viewing side as the front side, the curtain body 112 is located at the foremost side, and the lifting support assembly 120 is located at the rear side of the winding assembly 114. The curtain body 112 may include opposite fastening ends and winding ends, and the winding assembly 114 may include opposite connecting ends 1140 and winding ends 1142 extending in the height direction. The connection end 1140 is one end for fixedly connecting with a beam (not shown in the drawings) of the lifting support assembly 120, and the connection end 1140 can be used as a free end, and the connection end 1140 can be wound up from top to bottom by winding the winding end 1142. The fastening end of the curtain body 112 is located at the same end as the connecting end 1140 of the winding assembly 114, and the winding end is located at the same end as the winding end 1142 of the winding assembly 114.

Further, the winding assembly 114 can include an absorption surface 1144, and the absorption surface 1144 is a surface close to the curtain body 112, so that the curtain body 112 can be connected to the absorption surface 1144 of the winding assembly 114 by magnetic absorption. The absorbing surface 1144 of the winding assembly 114 can provide a support surface with better flatness for the curtain body 112, so that the curtain body 112 has better flatness, thereby improving the projection display effect. It can be understood that, in order to ensure the smoothness of the curtain body, the adsorption surface of the support component is generally a plane, and the shapes of other surfaces of the support component are not limited, so that the support can be realized. In the embodiment, the section bar with better rigidity and lower density can be used as the winding assembly, and the weight of the projection screen device is reduced under the condition that the function of the supporting assembly can be realized.

Referring to fig. 2, the lifting support assembly 120 is connected to a side of the projection curtain 110 away from the curtain body 112, and the lifting support assembly 120 includes a driving end (not shown) and an extending end (not shown) opposite to each other. The extending end is the same as the fastening end of the curtain body 112, and the driving end is the same as the winding end of the curtain body 112. After the installation, the projection curtain 110 can be vertically unfolded or rolled up under the effect of the lifting support component 120, and when the lifting support component 120 is in the unfolded state, the lifting support component 120 drives the projection curtain 110 to be unfolded, and the curtain body 112 and the adsorption surface 1144 of the winding component 114 are connected in an adsorption manner such as magnetic attraction. In the deployed state, the winding assembly 114 can serve as a support structure for the curtain body 112, such that the curtain body 112 can present an overall planar structure. In the rolled state, the curtain body 112 is rolled into a cylindrical structure.

The projection screen device 100 provided in the embodiment of the present application is an electric lifting structure, and the lifting support component 120 is located at the rear side of the projection curtain 110, and can drive the projection curtain 110 to unfold or wind. Because the winding assembly 114 is rigid, in the unfolded state, the winding assembly 114 can be in an integral planar state by means of the self-gravity and the torsional tension of the driving motor, thereby supporting the curtain body 112. In addition, the curtain body 112 and the winding assembly 114 are magnetically connected to each other, so that the overall thickness of the projection curtain 110 can be increased, the overall strength of the projection curtain 110 can be increased, and the flatness of the projection curtain 110 in the unfolded state can be improved.

It should be noted that the projection screen apparatus 100 provided in the embodiment of the present application is an electric lifting screen that is lifted from bottom to top. In alternative embodiments, the projection screen device 100 may also be used as a suspended drop-down motorized screen structure. When used as a suspended drop-down configuration, projection screen assembly 100 may have lift support assembly 120 removed. When deployed, the winding end of the projection curtain 110 gradually descends by its own weight until fully deployed. In other words, the projection screen apparatus 100 provided in the embodiment of the present application can be used not only as a ground-up electric curtain (which is unfolded from bottom to top), but also as a suspended-down electric curtain (which is unfolded from top to bottom). In addition, the requirement on the structural rigidity of the suspended descending type electric curtain is lower than that of the ground ascending type electric curtain, so that the product structure can be properly simplified, and the whole weight is reduced.

Referring to fig. 2 and 4 together, fig. 4 is a partially enlarged schematic view of fig. 2.

When the side of the projection image viewed by the user is the front side, the projection curtain 110 is located at the foremost side in the expanded state of the projection curtain 110, the lifting support component 120 is located at the rear side of the projection curtain 110, and the lifting support component 120 is used as a power and support component of the projection curtain 110, and can drive the projection curtain 110 to ascend or descend, so that the projection curtain 110 can be switched between the expanded state and the folded state.

When the projection screen 110 is in a retracted state (not shown), the projection screen 110 and the lifting support assembly 120 are both disposed within the housing 150 of the projection screen apparatus 100. The curtain body 112 and the winding assembly 114 can be cylindrical structures, the curtain body 112 is located above the winding assembly 114, and the lifting support assembly 120 is located behind the winding assembly 114 after being folded. The rolling is convenient, and the volume reduces after the rolling, is favorable to transportation and transport. When the foldable frame is unfolded, the foldable frame can be better kept as an integral plane, and the improvement of the flatness is facilitated.

Referring to fig. 5, a schematic structural diagram of the curtain body 112 of the projection curtain 110 is shown.

Specifically, the curtain body 112 may include a film layer 1120, an adhesive layer 1122, and a substrate layer 1124 connected in sequence. Adhesive layer 1122 is connected between membrane layer 1120 and substrate layer 1124, and serves to bond membrane layer 1120 and substrate layer 1124. During the installation, the film layer 1120 is located the foremost side that the user watched, and substrate layer 1124 is close to the absorption face 1144 setting of winding assembly 114, and substrate layer 1124 can be connected with the absorption face 1144 absorption of winding assembly 114 to realize curtain body 112 and the absorption purpose of being connected of winding assembly 114.

When the projection curtain 110 is in the unfolded state, the substrate layer 1124 of the curtain body 112 protrudes out of the two ends of the membrane layer 1120 along the two ends of the height direction, and the fastening end of the curtain body 112 is used for being fixedly connected with the beam of the lifting support component 120 so as to compensate the area of the edge position of the curtain body 112.

Alternatively, the patch layer 1120 may employ a fresnel screen, a wire grid screen, or other projection screen. Since the film layer 1120, the adhesive layer 1122, and the substrate layer 1124 need to be both smooth in unwinding and winding properties when selecting materials, in the present embodiment, the film layer 1120, the adhesive layer 1122, and the substrate layer 1124 are not necessarily designed to have too large thicknesses.

For example, the thickness of the membrane layer 1120 is 0.5mm or less, the thickness of the base material layer 1124 is 0.5mm or less, and the thickness of the curtain main body 112 is preferably 0.5mm to 1.0 mm.

Alternatively, divided from the use area of the curtain body 112, as shown in fig. 6, the curtain body 112 may include a screen display area 1126 and a fixing area 1128 located in the circumferential direction of the screen display area 1126. In short, the fixed area 1128 is located around the screen display area 1126.

The fixing area 1128 may be provided with an absorption layer, so that the curtain body 112 is connected to the winding assembly 114 through the absorption layer of the fixing area 1128 in an absorption manner, and when the projection curtain 110 is in the unfolded state, the screen display area 1126 of the curtain body 112 is in an unfolded, tensioned and flat state.

Further, the adsorbent layer may include magnetic glue, ferrous rubber, or a ferrous coating to facilitate an adsorbent connection with the winding assembly 114. The adsorption layer is attached to the periphery of the curtain main body 112, so that the peripheral edge position is prevented from being raised, and the screen display region 1126 is flattened by the stiffness of the base material layer 1124 of the curtain main body 112.

Optionally, decorative patterns may be affixed or printed on the fastening area 1128 to enhance the aesthetic appearance of the product.

It should be noted that the fixing region 1128 of the curtain body 112 in this embodiment is not used as a projection region, and is only used for performing suction connection with the winding assembly 114. The fixed region 1128 may include a four-layer structure including a diaphragm layer 1120, an adhesive layer 1122, a base material layer 1124, and an adsorption layer as an adsorption region; the screen display region 1126 may have a three-layer structure including a film layer 1120, an adhesive layer 1122, and a base material layer 1124 as a projection region.

Further, in consideration of the fact that the winding assembly 114 is actually produced, adjacent winding bodies 115 may have a certain error in matching, and adjacent two winding bodies 115 may have a certain step difference. The curtain body 112 has a high sensitivity to errors, which means that when the projection apparatus projects on the curtain body 112, slight horizontal stripes appear.

In order to improve the horizontal stripe phenomenon, a layer of buffer material may be added on the curtain body 112 to buffer the step between two adjacent winding bodies 115, so as to improve the projection effect.

Referring to fig. 7 and 8, there are shown schematic structural views of another structure of the curtain body 112.

The curtain body 112 can also include a cushioning layer 1125, as shown in fig. 7, where the cushioning layer 1125 is located between the bonding layer 1122 and the substrate layer 1124. Alternatively, as shown in fig. 8, the buffer layer 1125 is located on the side of the substrate layer 1124 away from the adhesive layer 1122.

The cushioning layer 1125 may be integrally formed with the substrate layer 1124, and the cushioning layer 1125 may be made of sponge, paper, flannelette, or other thin material with good cushioning property.

In alternative embodiments, buffer layer 1125 may have other structures. Referring to fig. 9, a schematic structural diagram of another structure of the curtain body 112 is shown.

The curtain body 112 can include a cushioning layer 1125, the cushioning layer 1125 being located on a side of the substrate layer 1124 facing away from the adhesive layer 1122. Buffer layer 1125 includes a plurality of buffer strips 113, and buffer strips 113 are disposed at intervals in sequence along first direction 001, and buffer strips 113 are connected to the adsorption surface of winding body 115. The first direction 001 is a direction extending from the fastening end 1132 side to the winding end 1135 side.

By designing buffer layer 1125 as a plurality of narrow strip structures, buffer strips 113 are sequentially arranged at intervals along first direction 001 and are connected to winding body 115 of winding assembly 114 in a one-to-one correspondence.

The projection curtain 110 provided by the embodiment of the application adds a layer of buffer material between the winding assembly 114 and the curtain body 112, and by using the buffer performance of the buffer material, the difference between any two adjacent winding bodies 115 in the winding assembly 114 is offset, and the buffer layer 1125 can weaken the magnetic attraction.

The curtain body 112 and the winding assembly 114 can be magnetically attached. In order to achieve better flatness, optionally, one of the substrate layer 1124 of the curtain body 112 and the winding assembly 114 may be made of a magnetic adhesive material, and the other may be made of an iron material capable of being connected to the magnetic adhesive material in an adsorption manner. According to the adsorption characteristics of the magnetic glue material and the iron material, the curtain body 112 and the winding assembly 114 can be adsorbed and connected, specifically, refer to the following table 1:

table 1 material combination table of substrate layer and winding assembly

As can be seen from table 1 above: in the embodiments of combination 1 and combination 2, the substrate layer 1124 may be made of a magnetic material (made of a mixture of ferrite magnetic powder and plastic or synthetic rubber). The absorbing surface 1144 of the winding assembly 114 for absorbing with the substrate layer 1124 may be made of ferromagnetic material, such as iron or steel. Alternatively, the winding assembly 114 may be made of aluminum, and the iron powder paint may be coated on the absorption surface 1144 of the aluminum.

In the embodiments of assembly 3 and assembly 4, the substrate layer 1124 may be made of soft iron sheet material (made of iron powder and plastic or synthetic rubber), and the absorption surface 1144 of the winding assembly 114 is made of magnetic material. For example, the winding assembly 114 may be made of aluminum or other non-ferrous material, and a magnetic adhesive layer may be attached to the absorption surface 1144 of the winding assembly 114 or a magnet may be mounted thereon.

In short, through the above material combination, a better suction effect can be achieved between the curtain body 112 and the suction surface 1144 of the winding assembly 114, which is beneficial for supporting the curtain body 112 through the winding assembly 114 and can provide better flatness.

Further, the winding assembly 114 may include a plurality of winding bodies 115 connected in sequence, and the suction surface 1144 is located at one side of the winding bodies 115. When the projection curtain 110 is in an expanded state under the action of the lifting support assembly 120, the winding bodies 115 are sequentially connected and can be located on the same plane to provide a planar support for the curtain body 112. And when the projection curtain 110 is in the rolling state under the effect of the lifting support component 120, the winding bodies 115 connected in sequence can be wound from the rolling end and can be in a columnar structure.

Referring to fig. 10, a structural diagram of one structure of the winding assembly 114 is shown.

Specifically, in one embodiment of the projection screen device 100 provided herein, the winding assembly 114 can include a winding body 115, a hinge 116, and a positive lock 117. The winding body 115 and the hinge 116 are sequentially connected in a cross manner along the winding direction to form a bendable whole, and the limiting locking piece 117 is connected to two ends of the hinge 116 and used for preventing dislocation on the premise of locking the hinge 116.

The winding bodies 115 are connected in sequence through the hinges 116 to form an integral large plane, and the winding bodies 115 serve as main bodies to support the curtain body 112. The hinge 116 may also improve the flatness of the unwound winding assembly 114 while providing a connecting function. Specifically, the hinge 116 is connected between any two adjacent winding bodies 115, so that the two adjacent winding bodies 115 can rotate relatively within a certain angle range, so as to facilitate winding when winding. In addition, the hinge 116 may reduce the spacing between any two adjacent winding bodies 115 and make the spacing between two adjacent winding bodies 115 uniform, thereby facilitating the flatness of the winding assembly 114 in the unfolded state.

Since the length of the single winding body 115 is long, the winding body 115 may be bent and deformed by its own weight in a laterally extended state. However, the deformation of the wound body 115 in the lateral extension direction is relatively gentle, and thus, may be considered as a substantially straight line within a short distance. And since any two adjacent winding bodies 115 are in a state of being extended in the transverse direction, the deformation may be inconsistent, and a large step difference may exist in the normal direction of the connecting surface.

By integrally penetrating the hinge member 116 between two adjacent winding bodies 115, the tight fit between the winding bodies 115 and the hinge member 116 can be improved, so that the step difference between any two adjacent winding bodies 115 is reduced, the step difference value of any two adjacent winding bodies 115 in the normal direction can be in a small value, and the small step difference of the winding bodies 115 is in smooth transition.

After the curtain body 112 is connected to the absorbing surface 1144 of the winding assembly 114 in a magnetic manner, the curtain body 112 is not prone to local sudden change or protrusion, so that the flatness of the curtain body 112 in the unfolded state can be improved.

Specifically, both sides of the winding body 115 in the width direction may be provided with first hinge parts (not shown), and both sides of the hinge 116 in the width direction may be provided with second hinge parts (not shown). When the winding bodies 115 and the hinges 116 are sequentially cross-connected, the hinges 116 are inserted between two adjacent winding bodies 115, and the first hinge parts of the winding bodies 115 are hinged to the second hinge parts of the hinges 116, thereby sequentially cross-connecting the plurality of winding bodies 115 and the plurality of hinges 116 as a whole. The retaining locks 117 are fixedly attached to both ends of the hinge 116 and serve to prevent misalignment of the winding assembly 114 when switching between the unwound state and the wound state. The winding assembly 114 can be connected into a whole by the hinge 116 and the limit locking piece 117, and has an unfolded state of being unfolded into a whole plane and a wound state of being wound into a column shape.

Referring to fig. 11, a schematic view of a winding body 115 of the winding assembly 114 is shown.

Specifically, the winding body 115 may include a support main body 1150 and a first hinge 1152 which are integrally formed, the first hinge 1152 being located at both sides of the support main body 1150 in the width direction. The absorption surface 1144 is located on one side of the support main body 1150 for absorbing and connecting the curtain body 112 and the support main body 1150. The first hinge part 1152 is used for being hinged with the hinge part 116, so that the whole body formed by connecting the winding body 115 and the hinge part 116 in sequence can rotate mutually at the hinged position, thereby being beneficial to winding, further reducing the volume of the winding assembly 114 and facilitating transportation and handling.

Optionally, the first hinge 1152 may include a limit lug 1154 and a swivel lead 1156. The limit lug 1154 is used for limiting a rotation angle of the hinge member 116 and the winding body 115 when rotating, the rotating guide arc 1156 is bent towards a side where the limit lug 1154 is located, and a gap is formed between the limit lug 1154 and the rotating guide arc 1156 to form a first hinge hole with an opening.

Alternatively, the winding body 115 may be provided as a hollow structure, by which the winding body 115 is reduced in weight while satisfying strength and flatness. In the embodiment of the present application, the supporting main body 1150 is a hollow structure, for example, a through hole may be formed in the supporting main body 1150 along the length direction, which is beneficial to reducing the weight of the winding body 115, and further reducing the weight of the winding assembly 114.

Referring to fig. 12, a schematic structural diagram of the hinge 116 is shown.

The hinge 116 may include a hinge body 1160 and a second hinge portion 1164 integrally formed, the second hinge portion 1164 being located at both sides of the hinge body 1160 in the width direction. Wherein the second hinge portion 1164 includes a hook fitted into the first hinge hole such that the hook of the second hinge portion 1164 can be inserted into the first hinge hole of the first hinge portion 1152. The two adjacent winding bodies 115 can rotate relative to each other within a certain range based on the connection between the two adjacent winding bodies 115 through the hinge 116. So that the winding body 115 and the hinge 116 can be sequentially connected in a cross manner in an unfolding state and are not easy to break, and can rotate at a certain angle in a winding state, and the winding is convenient to be wound into a columnar structure.

Alternatively, the hook may include a curved portion and a flat surface. The straight surface is positioned on the inner side surface of the curved arc part and is close to the edge position of the curved arc part. After the installation, straight face can with the spacing journal stirrup 1154 phase-match of coiling body 115, the curved arc portion can lead the arc 1156 phase-match with the rotation of coiling body 115.

Further, the hinge body 1160 is provided with a through hole 1162 along the length direction, and the limiting locking members 117 are fixedly connected to two end portions of the hinge body 1160. Therefore, the hinge 116 and the winding body 115 can be limited, and the hinge 116 can be prevented from being separated or dislocated relative to the winding body 115 along the length direction.

In addition, in order to make the limit locker 117 connect the hinge 116 and the winding body 115 and then smoothly wind. Alternatively, as shown in fig. 13, a schematic view of another perspective of the winding assembly 114 is shown.

The length of the hinge member 116 is greater than that of the winding body 115, that is, after the hinge member 116 is inserted into the first hinge hole of the winding body 115, two ends of the hinge member 116 can protrude from two ends of the winding body 115 in the length direction. The limit locker 117 is conveniently fixedly coupled to the end of the hinge 116, and the limit locker 117 does not interfere with the winding of the winding body 115.

The retaining lock 117 may comprise a stud and a nut. During installation, the stud is connected to the through hole 1162 of the hinge body 1160, the nut cap is disposed on the hinge member 116 and at least a portion of the winding body 115, and a gap is formed between the nut cap and the winding body 115. So that the nut can not only press the winding body 115 during winding process to prevent the winding body 115 from being misplaced left and right, but also can not interfere the winding body 115 due to the clearance between the nut and the winding body 115 during winding or unwinding process of the winding assembly 114, so that the winding assembly 114 can perform smooth winding.

As another embodiment, the winding assembly 114 may also be designed in other configurations. For example, the winding body 115 and the hinge 116 in the above embodiments may be integrally formed as a unitary structure. The winding bodies formed integrally are integrally connected end to end in sequence, and the winding bodies are formed by precisely matching the mutually connected positions. A connecting piece 1182 is added at the end of the winding body and is connected with the beam 119 through the connecting piece 1182.

Referring to fig. 14, a schematic structural view of another structure of the winding assembly 114 is shown.

Specifically, winding assembly 114 may include a winding body 115, a connecting member 1182, and a retaining member 1185. The number of the winding bodies 115 is plural, and the winding bodies 115 are sequentially connected end to form a winding body. The rolling body can include interlude subassembly and end assembly, and end assembly connects respectively in the both ends of interlude subassembly. The connecting member 1182 is connected between the end member and the middle member, and the position limiting member 1185 is connected to the connecting member 1182 and used for hinging the connecting member 1182 and the winding body 115.

Optionally, the connecting member 1182 may have a sheet-shaped structure, and the connecting member 1182 is provided with circular holes and oblong holes arranged at intervals in the width direction. The oblong hole is used for adjusting the connection position between the winding body 115 and the connection member 1182, so that the connection member 1182 and the winding body 115 can be adjusted in position when connected.

Both ends of the winding body 115 and the connecting member 1182 are fixed by the stoppers 1185, so that the connecting member 1182 can be restricted from being displaced in the longitudinal direction with respect to the winding body 115.

Referring to fig. 15 and 16, a third structure of the winding assembly 114 is schematically illustrated.

Specifically, winding assembly 114 includes a plurality of winding bodies 115 and a positive lock 117. A plurality of coiling bodies 115 connect end to end in proper order and form the rolling body, and spacing retaining member 117 connects in the hookup location between two adjacent coiling bodies 115, and is located coiling body 115 along length direction's both ends. After the plurality of winding bodies 115 are connected in sequence, in order to prevent the winding bodies 115 from being dislocated in the length direction, two adjacent winding bodies 115 may be limited in the length direction by the limiting locking member 117.

Fig. 17 is a schematic structural view of the winding body 115.

The winding body 115 may include a third hinge 1157, a support main body 1150, and a fourth hinge 1158, which are sequentially disposed in the width direction. The third hinge portion 1157 is provided with a winding shaft 1165 along the length direction of the winding body 115, and the winding shaft 1165 is provided with a connecting hole 1166 matched with the limiting locking member 117 along the axial direction. The fourth hinge 1158 has a positioning groove 1167 along the length direction of the winding body 115 to match with the winding shaft 1165.

As shown in fig. 16, any adjacent two of the winding bodies 115 may include first and second winding bodies 1151 and 1153, the first and second winding bodies 1151 and 1153 being connected in a width direction. In particular, when connected, the winding shaft 1165 of the first winding body 1151 is inserted into the positioning slot 1167 of the second winding body 1153. The limit locker 117 is connected to the connection holes 1166 at both ends of the winding shaft 1165, thereby limiting the winding shaft 1165 of the first winding body 1151 and the third hinge 1157 of the second winding body 1153 in the length direction from both ends, and preventing the occurrence of a dislocation phenomenon.

In order to allow any two adjacent winding bodies 115 in the sequentially connected winding bodies to have a larger winding angle.

Further, a winding gap 1155 is provided between the fourth hinge portion 1158 of the second winding body 1153 and the supporting main body 1150 of the first winding body 1151, so that when two adjacent winding bodies 115 are wound around each other, the problem of interference is avoided, so as to facilitate the rotation in a large angle.

Alternatively, the winding gaps 1155 at both sides of the winding shaft 1165 of the first winding body 1151 may be the same or different. When the winding gap 1155 is the same, the winding assembly 114 is wound from both sides at the same rotational angle; when the winding gap 1155 is different, the winding assembly 114 is wound from two sides at different rotation angles, wherein the rotation angle of one side is greater than that of the other side.

Alternatively, the winding assembly 114 may be wound from only one side when winding, i.e. the winding direction of the winding assembly 114 is defined.

Referring to fig. 18 and 19, there is shown another structure of the winding body 115, which is different from the above winding body 115 in that the winding gap 1155 is different from the winding shaft 1165 and the positioning groove 1167.

Specifically, the fourth hinge 1158 in the winding body 115 may include a first arc-shaped portion 1168 and a second arc-shaped portion 1169 in the thickness direction. The first arc portion 1168 protrudes from the second arc portion 1169 in the width direction of the winding body 115, and the first arc portion 1168 and the second arc portion 1169 enclose the positioning groove 1167.

When the first and second winding bodies 1151 and 1153 are connected, there is a winding gap 1155 between the second arc-shaped portion 1169 of the second winding body 1153 and the support main body 1150 of the first winding body 1151; the first arc-shaped portion 1168 of the second winding body 1153 abuts against the support main body 1150 of the first winding body 1151, thereby limiting the winding direction of the winding assembly 114 so that the winding assembly 114 can only rotate from the side having the winding gap 1155.

Further, when connecting in proper order, a plurality of coiling bodies 115, for convenience, swiftly connect, and avoid the reverse connection, can design and prevent slow-witted structure.

Alternatively, as shown in fig. 18, the support main body 1150 in the winding body 115 may include a recess 1159, the recess 1159 being adjacent to one end of the third hinge 1157, and the recess 1159 being adapted to cooperate with the first arc-shaped portion 1168 of the adjacent winding body 115, such that the first arc-shaped portion 1168 may be fitted into the recess 1159 and cooperate with the bottom end of the recess 1159 to limit the winding of the winding assembly 114 toward the other side.

For the winding assembly 114 in the present application, in order to reduce the weight of the winding body 115 and the production cost, optionally, the winding body 115 may be designed as a hollow structure.

Referring to fig. 20 and 21, a structure of the retaining locking member 117 is shown.

The retaining lock 117 may include opposing connection ends 1172 and abutting ends 1174, the connection ends 1172 being connection sections of the screws and the abutting ends 1174 being nut ends of the screws.

Wherein the connecting end 1172 is provided with an external thread to be screw-coupled with the connecting hole 1166. The abutment end 1174 is a truncated cone-shaped structure and includes a first abutment portion 1175 and a second abutment portion 1177 disposed along the axial direction. Wherein the second abutting portion 1177 is located at the periphery of the first abutting portion 1175, the first abutting portion 1175 may comprise a first end face 1176, and the second abutting portion 1177 may comprise a second end face 1178; and the first end face 1176 and the second end face 1178 are both located on a side of the abutting end 1174 facing the connecting end 1172.

During installation, the connection end 1172 is screwed into the connection hole 1166 of the winding shaft 1165, and the first end surface 1176 of the first abutting portion 1175 abuts against the end surface of the winding shaft 1165, so as to limit the winding body 115. A second end face 1178 of the second abutting portion 1177 corresponds to an end face of the fourth hinging portion 1158 and has an anti-interference gap 1179.

In order to avoid interference between the winding assembly 114 and the limiting locking piece 117 during rotation, the winding assembly cannot be normally wound or unfolded.

Alternatively, the outer diameter of the first abutment portion 1175 is smaller than the outer diameter of the winding shaft 1165, which may impart a certain amount of fastening force to the connecting end 1172. The outer diameter of the second abutting portion 1177 is smaller than the thickness of the winding body 115, so that the suction surface of the winding assembly 114 can always be a whole plane without affecting the flatness of the curtain body 112.

Further, a step is formed between the first end surface 1176 and the second end surface 1178, and the height of the step is greater than half of the tolerance of the overall length of the winding body 115 in the length direction.

Therefore, when the length of the second winding body 1153 is longer than that of the first winding body 1151 due to processing errors, the second end surface 1178 of the retaining lock 117 does not press the end of the second winding body 1153 when two adjacent winding bodies 115 are wound, so as to avoid the phenomenon of incapability of winding or winding jam.

Because the winding assembly 114 is formed by inserting the plurality of winding bodies 115 end to end, and the entire winding shaft 1165 and the positioning groove 1167 are precisely matched, the winding bodies 115 can be corrected to face one direction due to the deformation generated by manufacturing, all deformation sizes are limited to be the same, and the section difference between any two adjacent winding bodies 115 is reduced.

When all the winding bodies 115 are connected in sequence and installed, they can be wound to form a cylindrical structure, the winding assembly 114 is unfolded downwards, and under the action of self gravity or downward pulling force, the suction surface of the winding assembly 114 forms a whole large plane to suction and support the curtain body 112. The flatness of the curtain body 112 after adsorption and connection can be improved, and the projection display effect can be improved.

In order to ensure that the winding body 115 is in a completely horizontal state during actual installation, the winding body 115 may be misaligned left and right when inclined. The limiting locking pieces 117 are arranged at the two end parts of the winding body 115, and the first abutting parts 1175 of the limiting locking pieces 117 abut against the winding shaft 1165. When the winding assembly 114 inclines and any two adjacent winding bodies 115 slide along the axial direction, the purpose of uneasy dislocation is realized through the limit of the limit locking piece 117.

When the projection curtain 110 needs to be transported or carried, the projection curtain 110 can be rolled into a cylindrical structure in a winding manner, which is beneficial to reducing the volume. When projection is needed, the projection curtain 110 is unfolded through the lifting support component 120, and the projection curtain 110 has good flatness, so that a good projection display effect is achieved, and the operation is convenient when the projection curtain is switched between an unfolding state and a folding state.

Referring to fig. 22, a schematic structural diagram of the lifting support assembly 120 of the projection screen apparatus 100 according to the embodiment of the present disclosure is shown.

Specifically, lift support assembly 120 may include a skid 122, a scissor rack 124, a cross beam 119, and a power assembly.

The two ends of the scissor rack 124 are respectively a driving end 1201 and an extending end 1205, and the driving end 1201 is connected to the sliding rail 122 and is in transmission connection with the power assembly, so that the scissor rack 124 operates under the driving of the power assembly. The extension 1205 is connected to the beam 119, and is used to drive the projection curtain 110 to raise or lower along the height direction through the beam 119.

Alternatively, the cross beam 119 may be a strip structure, and the cross beam 119 may not only support the fastening end of the curtain body 112 and the connection end 1140 of the winding assembly 114, but also be hung on a wall. For example, the beam 119 may be fixed to a wall using a hanger to facilitate displaying an image projected by the projection device.

Optionally, the driving end 1201 of the scissor rack 124 is slidably connected to the sliding rail 122 in the first direction, and the extending end 1205 is slidably connected to the cross beam 119 in the first direction. The power assembly is in transmission connection with the driving end 1201 of the scissor frame 124 and drives the scissor frame 124 to open or close. When the scissor rack 124 is converted from the open state to the closed state, the driving end 1201 of the scissor rack 124 is driven by the power assembly to approach each other along the first direction, and then the scissor rack 124 drives the cross beam 119 to rise along the second direction having an included angle with the first direction, so that the extending end 1205 and the driving end 1201 of the scissor rack 124 are far away from each other. When the scissor rack 124 is converted from the retracted state to the extended state, the driving end 1201 of the scissor rack 124 is driven by the power assembly to move away from each other along the first direction, and then the scissor rack 124 drives the cross beam 119 to move down along the second direction having an included angle with the first direction, so that the extending end 1205 and the driving end 1201 of the scissor rack 124 are close to each other.

It should be noted that the first direction may be an extending direction of the sliding rail 122, and the driving end 1201 of the scissor frame 124 may slide back and forth on the sliding rail 122. The second direction may be perpendicular to or at an angle to the first direction.

Alternatively, the scissor rack 124 may include at least one set of support rods that are cross-connected to each other, and when the number of the support rods is multiple, the multiple sets of support rods may be sequentially hinged end to form a whole. And reinforcing rods can be adopted between two adjacent groups of supporting rods, and the strength can be increased through the reinforcing rods.

The drive end 1201 of the scissor frame 124 may include a first connection and a second connection. The slide rail 122 may include a first mounting portion and a first sliding portion, the first mounting portion being a fixed point on the slide rail 122, which is matched with the first connecting portion and the second connecting portion at the end of the driving end 1201. When the scissors assembly is mounted, the first connecting portion of the scissors assembly 124 is hinged to the first mounting portion, so that the first connecting portion of the scissors assembly 124 has only rotational freedom with respect to the first mounting portion. The second connecting portion is slidably connected to the first sliding portion of the sliding rail 122, and is in transmission connection with the power assembly. So that the second connecting portion of the scissor frame 124 can slide in the first direction to approach or move away from the first connecting portion under the driving of the power assembly.

Similarly, extension 1205 of scissor frame 124 may also include a third connection and a fourth connection. The cross member 119 may include a second mounting portion, which is a fixed point on the cross member 119, and a second sliding portion, which is matched to the third and fourth connecting portions at the end of the extension 1205. When the scissors are mounted, the third connecting portion of the scissors 124 is hinged to the second mounting portion, so that the third connecting portion of the scissors 124 has only rotational freedom with respect to the second mounting portion. The fourth connecting portion is slidably connected to the second sliding portion of the cross member 119. When the driving end 1201 of the scissor rack 124 is driven by the power assembly to slide along the first direction, the driving end 1201 drives the extension end 1205 to slide synchronously, so that the fourth connecting part is close to or far away from the third connecting part.

Specifically, the power assembly may include a first driving member and a lead screw 126 in transmission connection, the first driving member drives the lead screw 126 to rotate, and the second connecting portion of the scissor rack 124 is provided with a sliding block 128. The sliding block 128 is provided with a threaded hole matched with the screw rod 126, and the screw rod 126 is connected with the sliding block 128 in a threaded manner after penetrating through the threaded hole. When the screw rod 126 rotates, the slide block 128 can slide along the axial direction of the screw rod 126, so that the second connecting part can be connected with the screw rod 126 in a sliding way through the slide block 128. For example, when the first driving member drives the screw rod 126 to rotate in a clockwise direction, the slide block 128 drives the second connecting portion of the scissor frame 124 to approach each other in the first direction relative to the first connecting portion; when the first driving member drives the screw rod 126 to rotate in the counterclockwise direction, the sliding block 128 drives the second connecting portion of the scissor frame 124 to move away from the first connecting portion in the first direction.

Alternatively, in the projection screen device 100 provided in the embodiment of the present application, the number of the lifting support assemblies 120 may be two, and the two lifting support assemblies 120 are disposed at a side-by-side interval on the rear side of the winding assembly 114.

When the projection screen apparatus 100 is in the unfolded state, the overall weight of the projection screen apparatus is heavy due to the absorption connection between the lifting support assembly 120 and the projection curtain 110. In order to avoid the phenomenon that the device topples over to the front side due to the excessive weight of the projection screen 110 during the use in the unfolded state, a balancing force can be applied to the rear side of the lifting support assembly 120, so that the projection screen 110 can be always in the vertical state.

Further, with continued reference to fig. 2, the projection screen apparatus 100 provided in the embodiment of the present application may further include a forward tilting prevention mechanism 130, where the forward tilting prevention mechanism 130 is disposed on a side of the lifting support assembly 120 away from the projection curtain 110.

Specifically, referring to fig. 23, a schematic structural diagram of a forward tilting prevention mechanism 130 in the projection screen device 100 according to the embodiment of the present application is shown.

The anti-anteversion mechanism 130 may include a tension member 131, the tension member 131 having opposite fixed and tension ends. The fixed end is used for being fixedly connected with the beam 119 of the lifting support component 120, the tensioning end can be rolled or loosened, and when the lifting support component 120 is in the unfolding state, the tensioning piece 131 can be continuously in the tensioning state, so that pulling force towards the rear side can be provided for the lifting support component 120 and the projection curtain 110.

In order to make the forward-tilting prevention mechanism 130 perform releasing or rolling actions corresponding to the raising or lowering of the lifting support assembly 120, the tension member 131 is always in a tension state.

Further, the forward-tipping prevention mechanism 130 may further include a first winding mechanism. As shown in fig. 12, the first winding mechanism may include a first guide shaft 133, a first winding shaft 135, and a second driving member 137. Wherein, the tensioning end of tensioning member 131 is located first reel 135 around locating behind first guiding axle 133, and first reel 135 is connected with the transmission of second driving piece 137. The second driving member 137 can rotate the first reel 135, the first reel 135 can be unwound or wound around the tension member 131 by rotation, and the first guide shaft 133 can change the extending direction of the tension member 131 and facilitate the tension member 131 to be in a tension state.

For example, in the state shown in fig. 23, when the lifting support assembly 120 is converted from the unfolded state to the rolled-up state, the second driving member 137 rotates in the first rotation direction (clockwise direction), the tension end of the tension member 131 passes through the first guide shaft 133 and is wound around the first winding shaft 135, and meanwhile, the fixed end of the tension member 131 approaches toward the tension end side, so that the tension member 131 is rolled up. When the lifting support assembly 120 is converted from the rolling state to the unfolding state, the second driving element 137 rotates along a second rotation direction (counterclockwise direction) opposite to the first rotation direction, the tensioning end of the tensioning member 131 is loosened, and meanwhile, the fixed end of the tensioning member 131 moves towards the side far away from the tensioning end, so that the tensioning member 131 is unfolded, and under the action of the first guide shaft 133, the tensioning member 131 can be always in a continuous tensioning state, which is beneficial to providing continuous tensioning force for the projection curtain 110 and the lifting support assembly 120.

It should be noted that the forward lean prevention mechanism 130 and the elevation support assembly 120 need to move in synchronized cooperation. That is, when the lifting support assembly 120 drives the projection screen 110 to lift, the second driving member 137 of the forward tilting prevention mechanism 130 releases the tensioning member 131 through the first winding shaft 135, so that the tensioning member 131 can lift up along with the projection screen 110. And when the projection screen 110 is lifted to a proper position, the second driving member 137 reversely rotates to pull the tensioning member 131, so as to continuously apply a tensioning force to the projection screen 110 and the lifting support assembly 120.

Alternatively, the tension member 131 may be made of cloth, plastic, or other flexible materials. The specific material of the tension member 131 is not limited as long as the lifting support assembly 120 and the projection screen 110 can be continuously tensioned by the above structure to keep the projection screen 110 in a balanced state.

According to the projection screen device 100 provided by the embodiment of the application, the forward tilting prevention mechanism 130 is arranged on the rear side of the lifting support component 120, the first reel 135 is driven to rotate by the second driving piece 137, a continuous tension force is provided for the lifting support component 120 and the projection screen 110, a balance effect can be provided for the forward tilting trend generated by the self weight of the lifting support component 120 and the projection screen 110, and the projection screen device 100 is favorable for keeping the projection screen device 100 vertical in the unfolding state.

To enable the curtain body 112 and the take-up assembly 114 to be synchronously tightened or loosened when the projection curtain 110 is transitioned between the deployed and stowed states. Referring to fig. 3, the projection curtain 110 may further include a winding mechanism.

The winding mechanism may include a second winding mechanism and a third winding mechanism. The second winding mechanism is connected to the winding end of the curtain body 112, and the curtain body 112 can be synchronously unwound or wound when ascending or descending along with the lifting support assembly 120 by the second winding mechanism. The third winding mechanism is connected to the winding end 1142 of the winding assembly 114, and the lifting support assembly 120 can be automatically unwound or wound when being lifted or lowered by the third winding mechanism.

Considering that the winding mechanism is used to wind the curtain body 112 or the winding assembly 114 on the winding shaft when the winding mechanism ascends or descends along with the lifting support assembly 120, the number of winding layers on the winding shaft is changed along with the ascending or descending, which may easily tear the curtain body 112 or cause the curtain body 112 to scrape the opening position of the housing 150. Alternatively, the direction of the curtain body 112 or the winding assembly 114 can be changed by adding a guide shaft, and the curtain body 112 or the winding assembly 114 can be wound smoothly.

Referring to fig. 24, a schematic view of a partial structure of a projection curtain 110 in the projection screen apparatus 100 according to an embodiment of the present disclosure is shown.

Optionally, the projection curtain 110 can also include a second winding mechanism for winding the curtain body 112 into a cylindrical shape or unwinding the curtain body 112.

The second winding mechanism may include a second guide shaft 141, a second reel 142, and a third driver 144. Since the curtain body 112 includes a fastening end and a winding end opposite to each other, and the fastening end is fixedly connected to the cross beam 119, the winding end can be wound around the second guiding axle 141 and then wound on the second winding axle 142. The second roller 142 is connected to the third driving member 144 in a driving manner, the third driving member 144 is used for driving the second roller 142 to rotate synchronously, and the second roller 142 can wind or unwind the curtain body 112 while rotating.

Referring to fig. 25, a schematic view of a partial structure of a projection curtain 110 in the projection screen apparatus 100 according to an embodiment of the present disclosure is shown.

Optionally, the projection screen 110 may further include a third winding mechanism for winding the wind-up end 1142 of the winding assembly 114 into a cylindrical structure or unwinding the winding assembly 114.

The third winding mechanism may include a third guide shaft 146, a third reel 148, and a fourth driver 149. Since the winding assembly 114 includes the opposite connection end 1140 and the winding end 1142, and the connection end 1140 is fixedly connected to the cross beam 119, the winding end 1142 can be wound on the third reel 148 after being wound on the third guide shaft 146. The third reel 148 is in transmission connection with a fourth driving member 149, the fourth driving member 149 is used for driving the third reel 148 to rotate synchronously, and the third reel 148 can wind or unwind the winding assembly 114 while rotating.

Optionally, the number of the third guide shafts 146 is at least one, and when the number of the third guide shafts 146 is multiple, the multiple third guide shafts 146 are sequentially arranged at intervals, and the third guide shafts 146 close to the curtain body 112 can press the winding assembly 114, which is beneficial to separating the curtain body 112 from the winding assembly 114 when the curtain body 112 is rolled. The winding end 1142 of the winding assembly 114 is sequentially wound around the plurality of third guiding shafts 146, so that the direction of the winding end 1142 of the winding assembly 114 can be changed, the winding is facilitated, and the curtain body 112 is not easily interfered.

Alternatively, the take-up end 1142 of the take-up assembly 114 may be directly connected to the third spool 148, or may be transitionally connected by a cloth or other flexible material that reduces the overall weight of the take-up assembly 114 and is also beneficial for reducing manufacturing costs.

It is appreciated that in alternative embodiments of the present application, if the material surface of the projection screen 110 is sufficiently hard and not easily scratched, the second winding mechanism coupled to the winding end of the screen body 112 may share a winding shaft with the third winding mechanism coupled to the winding end 1142 of the winding assembly 114. In other words, the winding end 1142 of the winding assembly 114 is always attached to the back side of the winding end of the curtain body 112 and is wound or released synchronously with the movement of the lifting support assembly 120.

The projection screen device 100 provided by the embodiment of the application can be applied to projection screens such as laser television screens, and is particularly favorable for improving the display effect and reliability of products aiming at 100 inches, 120 inches and above products.

According to the projection screen device 100 provided by the embodiment of the application, by providing the projection curtain 110, the lifting support component 120 and the forward tilting prevention mechanism 130, the projection curtain 110 is connected with the curtain body 112 and the winding component 114 in an adsorption manner by adopting a magnetic attraction manner, so that the flatness of the curtain body 112 in an unfolded state can be improved. The lifting support component 120 is located at the rear side of the projection curtain 110, and can drive the projection curtain 110 to be unfolded or rolled, so that the operation is convenient and reliable. The projection screen device 100 is convenient to operate, can be unfolded or folded according to requirements, and can provide the curtain body 112 with better flatness so as to meet the actual use requirements.

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 the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (26)

1. A projection screen apparatus, comprising:

the projection curtain comprises a curtain body and a winding assembly, wherein the winding assembly comprises an adsorption surface, and the curtain body is positioned on one side of the winding assembly with the adsorption surface and can be in adsorption connection with the adsorption surface of the winding assembly; and

the lifting support component is connected to one side, away from the curtain body, of the projection curtain and comprises a driving end and an extending end which are opposite, and the extending end is connected with the projection curtain so that the extending end drives the projection curtain to ascend or descend while ascending and descending;

work as the projection curtain is in when being in the expansion state under the effect of lift supporting component, the curtain body with the adsorption plane of coiling component adsorbs the connection, and presents for the plane, works as the projection curtain is in when being in the rolling state under the effect of lift supporting component, the curtain body is convoluteed to column structure.

2. The projection screen device of claim 1, wherein the winding assembly includes opposing connection ends and a winding end, the lift support assembly includes a beam, the connection ends of the winding assembly are connected to the beam, and the connection ends can be wound by winding the winding end.

3. The projection screen device of claim 1, wherein the winding assembly comprises a plurality of winding bodies connected in sequence, the suction surface is located at one side of the winding bodies, and when the projection screen is in an unfolded state under the action of the lifting support assembly, the winding bodies are connected in sequence and located on the same plane; when the projection curtain is in a rolling state under the action of the lifting support assembly, the winding body is columnar.

4. The projection screen device of claim 3, wherein the winding assembly further comprises a hinge member and a position-limiting locking member, wherein a first hinge portion is disposed on each of two sides of the winding body along the width direction, a second hinge portion is disposed on each of two sides of the hinge member along the width direction, the second hinge portion is matched with the first hinge portion, the hinge member is inserted between two adjacent winding bodies and is hinged to the second hinge portion through the first hinge portion, and the position-limiting locking member is connected to an end of the hinge member and is used for preventing the winding bodies from being dislocated when the winding bodies are switched between the unwinding state and the winding state.

5. The projection screen device of claim 4, wherein the first hinge portion comprises a limiting lug and a rotating guide arc, the rotating guide arc is bent towards one side of the limiting lug, a gap is formed between the limiting lug and the rotating guide arc to form a first hinge hole with an opening, and the second hinge portion comprises a hook, and the hook is inserted into the first hinge hole.

6. The projection screen device of claim 5, wherein the hook comprises a curved portion and a flat surface, the flat surface is located on an inner side surface of the curved portion and close to an edge position of the curved portion, the flat surface is used for matching with the limiting support lug, and the curved portion is used for matching with the rotary guide arc.

7. The projection screen device of claim 4 wherein the winding body further comprises a support body, the first hinge is located on both sides of the support body in the width direction, and the support body is a hollow structure.

8. The projection screen device of claim 3, wherein the winding assembly further comprises a connecting member and a limiting member, the plurality of winding bodies are sequentially connected end to form a winding body, the winding body comprises an intermediate segment assembly and end assemblies connected to two ends of the intermediate segment assembly, the connecting member is connected between the end assemblies and the intermediate segment assembly, and the limiting member is inserted into the connecting member and connected to the winding body.

9. The projection screen device of claim 3, wherein the winding assembly further comprises a limit screw, the plurality of winding bodies are sequentially connected end to form a winding body, and the limit screw is connected to a connecting position of two adjacent winding bodies, is located at two ends of the winding body in the length direction, and is used for limiting the two adjacent winding bodies in the length direction.

10. The projection screen device of claim 9, wherein the winding body comprises a third hinge, a support main body, and a fourth hinge, the third hinge, the support main body, and the fourth hinge being sequentially arranged in a width direction, the third hinge being arranged along a length direction of the winding body, the winding shaft being axially provided with a connection hole, the fourth hinge being provided along the length direction of the winding body with a positioning groove matching with the winding shaft;

the two adjacent winding bodies comprise a first winding body and a second winding body, the winding shaft of the first winding body is inserted into the positioning groove of the second winding body, and the limiting screw is connected to the connecting hole and used for limiting the winding shaft of the first winding body and the third hinge part of the second winding body along the length direction.

11. The projection screen device of claim 10, wherein the fourth hinge of the second winding body has a winding gap with the support body of the first winding body.

12. The projection screen device of claim 10, wherein the fourth hinge portion includes a first arc portion and a second arc portion, the first arc portion protrudes beyond the second arc portion in a width direction of the winding body, and the first arc portion and the second arc portion enclose the detent;

a winding gap is formed between the second arc-shaped part of the second winding body and the support main body of the first winding body, and the first arc-shaped part of the second winding body abuts against the support main body of the first winding body so as to limit the winding direction of the winding assembly.

13. The projection screen device of claim 12, wherein the support body includes a recess proximate an end of the third hinge, the recess cooperating with the first arcuate portion.

14. The projection screen device of claim 10, wherein the limiting screw comprises a connecting end and an abutting end, the connecting end is provided with an external thread in threaded connection with the connecting hole, the abutting end is in a truncated cone-shaped structure and comprises a first abutting portion and a second abutting portion located on the periphery of the first abutting portion, the first abutting portion comprises a first end face, and the second abutting portion comprises a second end face;

the connecting end is connected to the connecting hole, the first end face abuts against the end face of the winding shaft, and the second end face corresponds to the end face of the fourth hinge portion and is provided with a preset gap.

15. The projection screen device of claim 2, wherein the lifting support assembly further comprises a sliding rail, a scissor frame, and a power assembly, wherein the scissor frame comprises the driving end and the extending end, the driving end is slidably connected to the sliding rail along a first direction, the extending end is slidably connected to the cross beam along the first direction, and the power assembly is in transmission connection with the driving end and drives the scissor frame to open or close;

when the scissors frame is folded, the scissors frame drives the beam to rise along a second direction which forms an included angle with the first direction so as to enable the extending end and the driving end to be away from each other, and when the scissors frame is unfolded, the scissors frame drives the beam to fall along the second direction so as to enable the extending end and the driving end to be close to each other.

16. The projection screen device of claim 15, wherein the power assembly includes a first driving member and a lead screw, the first driving member is in driving connection with the lead screw, the driving end is provided with a slider, and the slider is in driving connection with the lead screw and slides along the first direction along with the rotation of the lead screw.

17. The projection screen device of claim 1, further comprising a forward tilt prevention mechanism located on a side of the lift support assembly facing away from the projection screen, the forward tilt prevention mechanism including a tensioning member having opposing fixed ends and tensioning ends, the fixed ends being fixedly connected to the extended ends of the lift support assembly, the tensioning ends being rollable or releasable so that the tensioning member can be continuously in tension when the lift support assembly is in the extended state.

18. The projection screen device of claim 17, wherein the anti-tilt mechanism further comprises a first winding mechanism, the first winding mechanism comprises a first guide shaft, a first winding shaft, and a second driving member, a tensioning end of the tensioning member is wound around the first guide shaft and then connected with the first winding shaft, and the second driving member is in transmission connection with the first winding shaft;

when the lifting support assembly is converted from the unfolding state to the rolling state, the second driving piece rotates along a first rotating direction, the fixed end of the tensioning piece moves towards the tensioning end, and the tensioning piece is rolled; when the lift supporting component is converted into the unfolding state from the rolling state, the second driving piece rotates along a second rotating direction opposite to the first rotating direction, the fixed end of the tensioning piece is far away from the tensioning end, and the tensioning piece is in a continuous tensioning state.

19. The projection screen device of claim 1, wherein the projection screen further comprises a second winding mechanism, the second winding mechanism comprises a second guide shaft, a second winding shaft, and a third driving member, the screen body comprises a fastening end and a winding end opposite to each other, the fastening end is connected to the extending end of the lifting support assembly, the winding end is connected to the second winding shaft after being wound on the second guide shaft, the third driving member is in transmission connection with the second winding shaft, and the third driving member is used for winding or unwinding the screen body.

20. The projection screen device of claim 1, wherein the projection screen further comprises a third winding mechanism, the third winding mechanism comprises a fourth driving member, a third winding shaft and at least one third guide shaft, the winding end of the winding assembly is wound around the third guide shaft and then connected to the third winding shaft, the fourth driving member is in transmission connection with the third winding shaft, and the fourth driving member is used for winding or unwinding the winding assembly.

21. The projection screen device of any of claims 1-20, wherein the curtain body comprises a membrane layer, an adhesive layer, and a substrate layer that are connected in sequence, the substrate layer is disposed proximate to the suction surface of the winding assembly, and the substrate layer can be in suction connection with the suction surface of the winding assembly.

22. The projection screen device of claim 21, wherein the curtain body comprises a screen display area and a fixing area located circumferentially around the screen display area, the fixing area being provided with an adsorption layer to enable the curtain body to be in adsorption connection with the winding assembly through the fixing area.

23. The projection screen device of claim 22, wherein the adsorption layer comprises magnetic glue, ferrous rubber, or a ferrous coating.

24. The projection screen device of claim 21, wherein the curtain body further comprises a buffer layer located between the adhesive layer and the substrate layer, or wherein the buffer layer is located on a side of the substrate layer facing away from the adhesive layer.

25. The projection screen device of claim 21, wherein the curtain body further comprises a buffer layer, the buffer layer is located on a side of the substrate layer away from the bonding layer, the buffer layer comprises a plurality of buffer strips, the buffer strips are sequentially arranged at intervals along a first direction, and the buffer strips are connected with the adsorption surface of the winding assembly in an adsorption manner;

the curtain body includes opposite fastening and winding ends, wherein the first direction is a direction from the fastening end to the winding end.

26. The projection screen device of claim 21, wherein one of the substrate layer and the winding assembly comprises a magnetic material and the other comprises a ferrous material capable of being attached to the magnetic material.

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