WO2021164439A1

WO2021164439A1 - Projection screen structure

Info

Publication number: WO2021164439A1
Application number: PCT/CN2020/142115
Authority: WO
Inventors: 胡飞; 唐泽达; 李士杰; 赵振宇; 王霖
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2020-02-18
Filing date: 2020-12-31
Publication date: 2021-08-26
Also published as: CN212160333U

Abstract

Disclosed is a projection screen structure (100), comprising a projection screen (110), an upper frame (120) and an installation connecting member (130), wherein the projection screen (110) is fixedly installed on a preset installation plane by means of the installation connecting member (130); the upper frame (120) comprises a first installation surface (121) and a second installation surface (122) arranged opposite the first installation surface (121), the first installation surface (121) is used for being installed on the upper edge of the projection screen (110) in a matching manner, and the second installation surface (122) is bent backwards to form an installation groove (124); the installation connecting member (130) comprises a fixing part (132), a supporting part (131) and a connecting part for connecting the fixing part (132) and the supporting part (131), the fixing part (132) is fixedly installed at a preset installation position of the installation plane, and the supporting part (131) and the installation groove (124) provided by bending the second installation surface (122) of the upper frame (120) are installed in a limiting and clamping manner. The installation groove (124) of the upper frame (120) and the supporting part (131) of the installation connecting member (130) fixed to the installation plane are installed in a limiting manner to achieve the aim of simplifying installation steps; in addition, the projection screen (110) can be curled by means of the upper frame (120), and therefore the projection screen (110) can be conveniently transported.

Description

Projection screen structure

【Technical Field】

The utility model relates to the field of projection display equipment, in particular to a projection screen structure which is convenient for installation and transportation and can maintain good flatness.

【Background technique】

Projection screens are one of the most commonly used products in the peripheral equipment of projection display devices, and are widely used in theaters, schools, homes, large conferences and other occasions.

Projection screens currently on the market usually include soft screens and hard screens. At this stage, the use of ultra-short throw Fresnel light-resistant projection screens of 100 inches and above usually rely on a high-hardness backplane to provide support, and assembly processes such as lamination are required to fix the screen. This screen structure can ensure the flatness of the screen, thereby ensuring the viewing effect of high-quality projection display, but when the fixed installation plane is uneven or inclined, the traditional backplane installation structure may cause the screen to tilt. In addition, because the backplane uses metal materials such as honeycomb aluminum, the overall weight is large, and the screen cannot be bent, causing greater difficulties in installation and transportation.

When the soft curtain is unfolded, the surrounding frame or side elastic parts are generally used to provide uniform tension. The advantage of this soft curtain is that it can be rolled up and stored and is convenient for transportation. User viewing effect.

Therefore, it is necessary to provide a new projection screen structure to solve the above technical problems.

[Utility model content]

The purpose of the utility model is to provide a projection screen structure, which can not only solve the transportation difficulties and complicated installation procedures caused by the traditional backplane screen structure, but also maintain good flatness and ensure the user's viewing effect.

In order to achieve the above objective, the present invention provides a projection screen structure, which includes a projection screen, an upper frame and an installation connector, the projection screen is fixedly installed on a predetermined installation plane through the installation connector; the upper frame includes A first mounting surface and a second mounting surface set opposite to the first mounting surface, wherein the first mounting surface is used for co-installation with the upper edge of the projection screen, and the second mounting surface is bent backward to form Installation groove; the installation connector includes a fixing portion, a support portion and a connecting portion connecting the fixing portion and the support portion, the fixing portion is fixedly installed at a preset installation position on the installation plane, the support portion and the upper frame The installation groove formed by the bending of the second installation surface is clamped and installed.

Preferably, the projection screen includes a screen body and a cross bar fixed on the upper edge of the screen.

Preferably, the fixed connection between the projection screen body and the cross bar can be achieved by turning up the cross bar at one end of the cloth and gluing the other end with the screen body.

Preferably, the projection screen body can be fixedly connected to the crossbar by direct gluing.

Preferably, the first mounting surface of the upper frame is bent forward to form an accommodating cavity, and the accommodating cavity is connected with a cross bar fixed on the upper edge of the screen to achieve a limit installation connection.

Preferably, the installation connector is a first installation connector.

Preferably, the first installation connecting member is a supporting device.

Preferably, the first installation connecting member is a flatness adjusting device, which can adjust the displacement of the flatness adjusting device relative to the initial fixed position in a direction perpendicular to the installation plane.

Preferably, the first installation connecting member may be one or more, which are fixed at a predetermined installation position on the installation plane. At the same time, the first installation connectors fixedly installed at the installation location points may be the same first installation connectors, or may be a combination of different first installation connectors.

Preferably, the projection screen structure further includes a lower frame, and the lower frame has a structure symmetrical to the upper frame.

Preferably, the installation connector is a second installation connector.

Preferably, the second installation connecting member may be a supporting device.

Preferably, the second installation connecting member may be a flatness adjustment device, which can adjust the displacement of the flatness adjustment device relative to the initial fixed position in a direction perpendicular to the installation plane.

Preferably, the second installation connecting member may be a tension adjustment device, which can adjust the displacement of the tension adjustment device relative to the initial fixed position in a direction parallel to the installation plane.

Preferably, the second installation connecting member is a flatness and tension adjustment device, which can adjust the height of the flatness and tension adjustment device perpendicular to the installation plane direction, and can also adjust the flatness and tension adjustment device relative to The displacement of the initial fixed position in a direction parallel to the installation plane.

Preferably, there may be one or more second installation connections, which are fixed to a preset installation position on the installation plane; the second installation connections fixedly installed at the installation position point may be the same second installation The connecting piece may also be a combination of different second installation connecting pieces, wherein the installation number of the tension adjusting device must be an even number, and the installation positions of the tension adjusting device are symmetrically distributed in the horizontal direction.

Preferably, there are four second installation connectors, which are fixed to four installation positions preset on the installation plane, and the four installation positions are horizontally distributed in the transverse direction and vertically distributed in the longitudinal direction.

More preferably, the four installation location points are 0.8 m to 1.5 m apart.

Preferably, the installation connectors that are fixedly installed at the installation position points may be the same installation connectors, or may be a combination of different installation connectors.

Preferably, the projection screen structure further includes a left frame and a right frame. More preferably, the left and right frames and the upper and lower frames have the same width and material, and the left frame and the right frame are not directly connected.

Preferably, the connection between the left and right frames and the upper and lower frames adopts a blanking cover for interference fit installation.

Compared with the related art, in the projection screen structure of the present invention, the projection screen structure of the present invention includes a projection screen, an upper frame, and an installation connector. The projection screen is fixedly installed on a predetermined installation plane through the installation connector. The frame includes a first installation surface and a second installation surface set opposite to the first installation surface, wherein the first installation surface is used for co-installation with the upper edge of the projection screen, and the second installation surface is bent backward to form an installation groove; The installation connector includes a fixing part, a supporting part and a connecting part connecting the fixing part and the supporting part. The fixing part is fixedly installed at a preset installation position on the installation plane, and the supporting part and the second installation surface of the upper frame are bent to form an installation groove Limit card connection installation. In the above structure, the groove of the frame and the supporting part of the installation connector fixed on the installation plane are installed to achieve the purpose of simplifying the installation steps. At the same time, the projection screen can be curled by the upper frame to realize the convenient transportation of the projection screen.

【Explanation of the drawings】

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a front view of a projection screen structure of the utility model;

Figure 2 is a side view of a projection screen structure of the utility model;

Figure 3 is a schematic diagram of the installation of a projection screen structure of the utility model;

Figure 4 is a schematic diagram of the fixed structure of the projection screen body and the crossbar of the utility model;

Figure 5 is a side view of the upper frame structure of the utility model;

Fig. 6 is a schematic structural diagram of a first installation connecting piece of the projection screen structure of the present invention;

Fig. 7 is a schematic structural diagram of another first installation connector of the projection screen structure of the present invention;

Figure 8 is a side view of another projection structure of the utility model

Fig. 9 is a schematic structural diagram of a second installation connector of the projection screen structure of the present invention;

Fig. 10 is a schematic structural diagram of another second installation connecting member of the projection screen structure of the present invention;

Figure 11 is a schematic diagram of the installation and positioning of the installation connector of the projection screen structure of the utility model;

Figure 12 is a schematic diagram of the installation of the longitudinal tension adjustment mechanism of the projection screen structure of the utility model;

Figure 13 is a front view of another projection structure of the utility model;

Figure 14 is a schematic diagram of the assembly of the corners of the surrounding frame of the projection structure of the utility model;

Figure 15 is a schematic diagram of the utility model projection structure curling package;

【Detailed ways】

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

The projection screen structure of the present invention includes a projection screen, an upper frame and an installation connecting piece. The projection screen is fixedly installed on a predetermined installation plane through the installation connecting piece. The upper frame includes a first installation surface and a first installation surface. The second mounting surface is arranged opposite to each other, wherein the first mounting surface is used for co-installation with the upper edge of the projection screen, and the second mounting surface is bent backward to form a mounting groove; the mounting connector includes a fixing part, a supporting part and a connection The connecting part of the fixing part and the supporting part, the fixing part is fixedly installed at a preset installation position of the installation plane, and the supporting part is clamped and installed with the installation groove formed by bending the second installation surface of the upper frame.

Please refer to FIGS. 1-2 at the same time, a projection screen structure 100 provided by an embodiment of the present utility model includes a projection screen 110, an upper frame 120 and a first installation connector 130, wherein the projection screen 110 passes through the first An installation connector 130 is fixedly installed on a predetermined installation plane.

The upper frame 120 has a first mounting surface 121 (numbers are given in the figure) matingly connected with the projection screen 110 and a second mounting surface 122 (numbers are given in the figure) that is arranged opposite to the first mounting surface 121.

In the present invention, the first mounting surface 121 is used to cooperate with the projection screen 110 to provide lateral tension to the projection screen 110. Specifically, in this embodiment: the physical form of the first mounting surface 121 may be a plane as shown in FIG. Provide lateral tension to the projection screen 110; the physical form of the first mounting surface 121 can also be a receiving cavity as shown in FIG. It is fixedly matched to provide lateral tension to the projection screen 110.

It can be understood that the connection mode in which the first mounting surface 121 is directly attached to the projection screen 110 cannot be detached. In order to facilitate disassembly, preferably, the first mounting surface 121 adopts a receiving cavity structure to connect to the projection screen. The upper edge of the 110 is fixedly matched.

It is understandable that in the present invention, the physical form of the first mounting surface 121 is not limited to the two methods listed above. The physical form of the first mounting surface 121 can be designed according to different product design requirements. As long as the structural design that can provide lateral tension to the projection screen 110 can be applied to the present invention as the first mounting surface 121.

The specific structure of the projection screen of this embodiment is shown in FIG. 3. In order to enable the upper edge of the projection screen 110 and the receiving cavity to realize limited installation, the projection screen 110 of this embodiment includes a screen body 111 and a cross bar 112; the cross bar 112 and the screen body 111 The upper edge is fixedly connected to ensure a certain horizontal tension and keep the screen flat in the horizontal direction; Figure 4 schematically illustrates the fixing method of the screen 111 and the cross bar 112, and Figure 4(a) uses the fabric 113 turned up The fixing method is that the screen 111 and the cloth 113 are glued together at one end, and the cloth 113 is folded to form a hollow storage space. The screen cross bar 112 is placed in the hollow storage space formed by the cloth 113, which can effectively bear the longitudinal load of the screen; Figure 4 (b) and Fig. 4(c) adopt a fixing method in which the screen 111 and the crossbar 112 are directly glued. The crossbar 112 in Fig. 4(b) includes a head 1121 and an extension tail 1122 connected to the head. The tail 1122 is adhesively connected to the screen 111 to increase the contact area between the crossbar 112 and the screen 113; the crossbar 112 in Figure 4(c) is an integral structure, and one side of the crossbar 112 is adhesively connected to the screen 111. During the process, a horizontal tension is applied to the screen 111 in advance, and the screen 111 can maintain an effective horizontal tension after being glued and fixed. Preferably, the material of the cross bar 112 is hard plastic or metal.

It should be noted that the fixing method of the upper edge of the screen and the cross bar 112 in this embodiment can be selected to be any of the above three fixing methods, but is not limited to this.

Please refer to FIG. 5 again, the first mounting surface 121 and the second mounting surface 122 of the upper frame 120 are arranged opposite to each other so that the upper frame 120 is substantially in a "T"-shaped structure. The first mounting surface 121 is bent forward to form a penetrating receiving cavity 123, and the upper edge of the projection screen 111 is fixedly connected with a cross bar 112 to achieve a limit installation; the second mounting surface 122 is bent backward to form a mounting groove 124, The installation groove 124 is used for snap connection with the first installation connector 130 pre-fixed on the installation plane, so as to realize the installation and fixation of the screen structure 100 in this embodiment.

Preferably, because the upper frame 120 supports and provides tension to the projection screen 110, it needs to have good bending strength. In addition, considering the ease of installation, transportation and operation, further, the upper frame 120 can choose a density. Lower metal material.

Refer to FIG. 6 for the structure of the first mounting connector 130 of this embodiment. The first mounting connector 130 includes a supporting portion 131 and a fixing portion 132. The supporting portion 131 and the fixing portion 132 are bent and connected. The slot 124 realizes the coordinated and snap-fit installation; the fixing part 132 includes two through fixing

holes

1321 and 1322, and the fixing part 132 is fixed to the through fixing

holes

1321 and 1322 by two fasteners (not shown in the figure). The pre-set installation position of the installation plane. It is worth mentioning that the number of the first installation connectors 130 is not limited. According to the size of the projection screen and the position of the projection screen from the projector, the position of the first installation connector 130 and the used first are preset. A number of installation connectors 130, a corresponding number of first installation connectors 130 are installed at a predetermined number of installation plane installation positions, through the support portions 131 of the plurality of first installation connectors 130 and the upper frame groove The coordinated snap-fit installation of 124 realizes the fixed support for the projection screen 110. In the present invention, when the projection screen structure 100 is matched with an ultra-short throw projector, the best vertical distance between the opening position of the first installation connector 130 of the projection screen structure 100 and the projector is H ₁ , so the screen is installed The position needs to be accurately preset in advance and keep the screen level. Preferably, two points spaced at a certain interval in the horizontal direction are selected as the preset installation positions of the first installation connectors 130. Further, the interval between the two horizontally distributed first installation connectors 130 is 0.8-1.5 m .

More preferably, in order to maintain the aesthetics of the front viewing screen, the installation position of the first installation connector 130 needs to ensure that the overall structure of the first installation connector 130 is completely hidden behind the projection screen 110.

It should be noted that the fixing portion 132 of the first installation connector 130 of this embodiment is fixed on the installation plane by fasteners, and the frame groove 124 on the screen is coordinated with the support portion 131 of the first installation connector 130 for suspension installation. , The first installation connector 130 can only achieve a fixed support for the projection screen 110. When the installation plane is uneven, the first installation connector 130 of this embodiment cannot adjust the installation position adaptively according to the unevenness of the installation plane. The height is used to ensure the flatness of the screen 110, that is, the first installation connector 130 of this embodiment is suitable when the installation plane of the screen is relatively flat.

In view of the uneven installation plane, the present invention provides another embodiment of the first installation connector of the projection screen structure. For the structure, refer to FIG. 7, and FIG. 7(a) is the first installation connector 140 of this embodiment. In the structural schematic diagram of the present embodiment, the first mounting connector 140 of the present embodiment includes a supporting portion 141 and a fixing portion 142, and the supporting portion 141 and the fixing portion 142 are connected by threads. The fixing portion 142 of the first installation connector 140 is fixedly installed on the installation plane by fasteners (not shown), and the support portion 141 of the first installation connector 140 is used to realize a coordinated snap connection with the frame groove 124 Installation, through the screw connection rotation design between the supporting part 141 and the fixing part 142, the height of the supporting part 141 relative to the fixing part 142 in the direction perpendicular to the installation plane can be adjusted, that is, by rotating the thread between the supporting part 141 and the fixing part 142 The supporting portion 141 can be moved away from or close to the installation position of the installation plane in a direction perpendicular to the installation plane. Based on this structure, the first installation connector 140 of this embodiment can be adjusted according to the unevenness of the installation wall surface.

It is worth mentioning that the number of the first installation connectors 140 is not limited. According to the size of the projection screen and the position of the projection screen from the projector, the position of the first installation connector 140 and the used first are preset. A number of installation connectors 140, a corresponding number of first installation connectors 140 are installed in a predetermined number of installation plane installation positions, through the support portions 141 of the plurality of first installation connectors 140 and the upper frame groove The coordinated snap-fit installation of 124 realizes the fixed support for the projection screen 110.

Preferably, for the unevenness of different installation positions on the installation plane, different first installation connectors can be selected, and the first installation connector 140 in this embodiment can be selected for uneven installation positions, and the installation plane is flat. The installation position is selected to use the first installation connection 140 in this embodiment or the first installation connection 130 of the previous embodiment, that is, the combination of the first installation connection is not limited, and the same first installation connection can be selected You can also choose to use a combination of different first installation connectors.

Maintaining the flatness of the projection screen 110 requires uniform projection screen tension. The tension is divided into horizontal tension and vertical tension. At present, the horizontal tension is provided by the tension of the cross bar 112 and the upper frame 120, and the longitudinal tension is only provided by the gravity of the projection screen 110 itself. Further, in order to maintain the flatness of the projection screen 110 when it is unfolded, as a better implementation, the projection screen structure 200 further includes a lower frame 250, see FIG. 8. Preferably, the lower frame 250 and the upper frame 220 have a symmetrical design structure, and the first installation plane of the lower frame 250 is also bent forward to form a receiving cavity, and is installed in a limited position with a cross bar fixed on the lower edge of the projection screen 210 to further ensure According to the horizontal flatness of the projection screen 210, a corresponding number of second installation connectors 230 are installed at a predetermined number of installation plane installation positions according to the size of the projection screen 210 and the position of the projection screen 210 from the projector. The second installation connector 230 includes a second installation connector 231 for the upper frame 220 and a second installation connector 232 for the lower frame 250, wherein the support portion of the second installation connector 231 for the upper frame 220 is connected to the upper frame 220. The coordinated snap-fit installation of the bezel groove realizes the fixed support of the projection screen 210, and the coordinated snap-fit installation of the second installation connector 232 for the lower bezel and the lower bezel groove realizes a further fixation of the screen , While providing the maintenance of longitudinal tension.

Furthermore, the lower frame 250 can add a weight with a certain weight to provide stronger longitudinal tension for the projection screen 210.

Similarly, the number of the second installation connector 230 is not limited. According to the size of the projection screen 210 and the position of the projection screen 210 from the projector, the position of the second installation connector 230 and the second used connection are preset. The number of the installation connectors 230, the corresponding number of the second installation connectors 230 are installed in a predetermined number of installation plane installation positions, through the support parts of the plurality of second installation connectors 230 and the upper frame groove or the bottom The coordinated snap-fit installation of the frame groove realizes the fixed support for the screen 210. At the same time, in view of the difference in the unevenness of the installation plane, the combination of the second installation connection 230 is not limited, and the same second installation connection 230 can be selected, or a different combination of the second installation connection 230 can be selected. Preferably, the second installation connecting piece 231 for the upper frame 220 and the second connecting piece 232 for the lower frame 250 can share the same structure, but the installation directions are different, which reduces the types of parts and reduces the difficulty of installation .

Preferably, when the installation plane is relatively flat, the selected second installation connection 230 may be a supporting device having the same structure as the first installation connection 130. In view of the uneven installation plane, the selected second installation connector 230 can be a flatness adjustment device with the same structure as the first installation connector 140. The specific structure and adjustment principle are the same as those in the previous embodiment. No longer.

When the installation plane is uneven, not only the flatness of the installed projection screen 210 will be affected, but also the height of the left and right sides of the screen 210 will be inconsistent, making the screen 210 not perpendicular to the main line of sight direction. The installation and positioning requirements are very accurate, which brings great inconvenience to the installation operation. Therefore, in order to better adapt to different installation plane conditions, the present invention provides a second installation connector 260 that can adjust the longitudinal tension exerted by the screen 210, and can provide adaptability according to the position of the connected screen frame. Longitudinal tension adjustment. Referring to FIG. 9, the second mounting connector 260 for longitudinal tension adjustment includes a supporting portion 261 and a fixing portion 262. The supporting portion 261 and the fixing portion 262 are elastically connected, and the fixing portion 262 includes two through fixing

holes

2621, 2622. , Two fasteners (not shown in the figure) are passed through the through fixing

holes

2621 and 2622 to fix the fixing part 262 to the pre-set installation plane installation position, and the elastic connecting part 263 applies pressure to the support part 261 at the same time The frame installation groove and the supporting part 261 are restrictedly installed to provide an adjustable longitudinal pressure to the screen. That is, the support portion 261 of the second installation connector 260 is used to realize the coordinated and snap-fit installation with the upper frame groove or the lower frame groove. The elastic connection design between the support portion 261 and the fixing portion 2622 can adjust the support portion 261 relative to each other. The height of the fixing portion 262 in the direction parallel to the installation plane, that is, the elastic connection between the support portion 261 and the fixing portion 262 can make the support portion 261 move away from or close to the installation position of the installation plane in a direction parallel to the installation plane.

The number of second installation connectors 260 that can be used to adjust the longitudinal tension applied to the screen determines the vertical support tension of the screen. Each second installation connector 260 provides an elastic force of 10-100N, preferably, according to different application situations The combination of the second mounting connector 230 is not limited. You can choose to use the same second mounting connector 230 on the upper frame 220 or the lower frame 250, or you can choose to use a different combination of the second mounting connectors 230. It is noted that the number of the second installation connectors 260 selected for use must be an even number, and they must be symmetrically distributed in the horizontal direction.

For example, when the installation plane is uneven and the screen tension needs to be adjusted at the same time, the present invention provides a combination of a second installation connector 230 that can achieve flatness adjustment and a second installation connector 260 that can achieve longitudinal tension adjustment to maintain the screen. Effective and suitable flatness, it is worth mentioning that the elastic connecting portion 263 of the second mounting connector 260 for longitudinal tension adjustment exerts a certain elastic force on the clipped frame through the supporting portion 261, and the frame will be displaced in the longitudinal direction. At this time, if it is combined with the second installation connection 230 for flatness adjustment or/and the second installation connection 230 for support to realize the support adjustment of the screen, it is necessary to ensure the second installation connection for tension adjustment The displacement of the frame caused by 260 cannot make the frame leave the second mounting connector 230 for flatness adjustment or the supporting force surface of the second mounting connector 230 for support.

In order to reduce the difficulty of implementation, the present invention provides another embodiment of the second installation connector of the projection screen structure 200, which can adjust the flatness and tension at the same time. For the structure, see FIG. 10, the second installation connector of this embodiment 270 includes a supporting portion 271 and a fixing portion 272. The supporting portion 271 and the fixing portion 272 are connected by an adjusting mechanism 273. The adjusting mechanism 273 includes an adjusting screw 2731, an adjusting slider 2732, and an adjusting sliding shaft 2733. The second installation connection piece 270 is fixedly installed on the installation plane by the fixing part 272 through fasteners (not shown in the figure). Try to keep the second installation connection piece 270 aligned in the horizontal and vertical directions. The second installation connection piece The support portion 271 of 270 includes a support element 2711, a fixed base plate 2712, and a nut 2713. The support element 2711 is used to achieve coordinated and snap-fit installation with the frame groove. The base plate 2712 is fixedly connected to the adjusting slider 2732 on the adjusting mechanism 273 to change the support. The distance between the element 2711 and the fixed base plate 2712 in the direction perpendicular to the installation plane can be realized by rotating the nut 2713. By rotating the adjusting screw 2731, since the adjusting screw 2731 is threaded with the adjusting slider 2732, changing the position of the adjusting slider 2732 can drive the support part 271 to slide up and down. At the same time, the nut 2713 is connected to the adjusting slider 2732 by rotating to adjust the position of the slider 2732. The change of φ in turn drives the rotation of the nut 2713, so that the supporting element 2711 is close to or away from the fixed base plate 2712 in the direction perpendicular to the installation plane, that is, the supporting element 2711 moves back and forth in the direction perpendicular to the installation plane. In this embodiment, the adjustment of the flatness of the screen 210 and the longitudinal tension applied to the screen 210 can be realized at the same time through an adjustment mechanism 273 of the second installation connector 270, with fewer installation parts and simple implementation and operation.

The installation position and number of the second installation connectors 230 determine the upper and lower support tension of the screen 210. In the present invention, when the projection screen and the ultra-short throw projector are matched, the second installation connector 230 of the projection screen structure 200 The best vertical distance between the opening position of the hole and the projector is H ₁ , so the screen installation position needs to be accurately preset in advance and keep the screen 210 level. Preferably, the installation position is pre-selected for four-point positioning. Refer to Figure 11, the four-point installation position is horizontal horizontally and vertically vertical. Under the premise that the flatness of the screen 210 can be maintained after the screen 210 is installed stably, the installation parts are minimized. , Reduce the difficulty of installation.

Referring to FIG. 12, under the premise of ensuring the flatness of the screen 210 by using four-point positioning to install the fixed installation connector, the longitudinal tension adjustment mechanism 280 fixed at any position of the installation plane can also be added to provide the maintenance of the longitudinal tension. The adjustment mechanism 280 is elastically connected with the upper frame 220 and the lower frame 250. Preferably, the installation position of the longitudinal tension adjustment mechanism 280 is such that the whole is hidden at any position behind the screen 210. It can be installed on the upper and lower frames at the same time or can be installed on one side. The number of the longitudinal tension adjustment mechanism 280 used at the same time can be one or Multiple, not limited to this.

In order to maintain the aesthetics of viewing the projection screen from the front and enhance the user’s viewing experience, preferably, the projection screen structure 300 of the present invention may further include a left frame 360 and a right frame 370, see FIG. 13, furthermore, the left and right frame structures are the same. Excellent, the left and right borders and the upper and lower borders can be designed with the same width and narrow borders of the same material. The addition of the left and right borders not only improves the aesthetics of the projection screen, because the projection screen is installed in the left and right borders, it can maintain the projection screen with uneven edges. Its edges and corners are flat, which improves the overall flatness of the screen. It should be noted that in this embodiment, the left and right frames and the upper and lower frames are not directly connected, which facilitates distributed packaging and compact transportation.

Further, for the consideration of installation accuracy and thermal expansion and contraction effects, the four corners of the surrounding frame of the projection screen of this embodiment are installed in interference fit with the cross bar 312 fixed on the upper edge of the screen using a stuffing cover 380. Refer to Figure 14 for a schematic diagram of the installation structure.

The projection screen structure provided by the utility model can rely on the upper frame and or the lower frame to curl during packaging and transportation. The curling schematic diagram is shown in Figure 15. The left and right frames, the installation connecting parts and other parts are shorter in length, and they are placed on the screen during packaging. The hollow area after curling is sufficient, which reduces the transportation volume and reduces the transportation cost.

Compared with the related art, in the projection screen structure of the present invention, the projection screen structure of the present invention includes a projection screen, an upper frame, and an installation connector. The projection screen is fixedly installed on a predetermined installation plane through the installation connector. The frame includes a first installation surface and a second installation surface set opposite to the first installation surface, wherein the first installation surface is used for co-installation with the upper edge of the projection screen, and the second installation surface is bent backward to form an installation groove; The installation connector includes a fixing part, a supporting part and a connecting part connecting the fixing part and the supporting part. The fixing part is fixedly installed at a preset installation position on the installation plane, and the supporting part and the second installation surface of the upper frame are bent to form an installation groove Limit card connection installation. In the above-mentioned structure, the groove of the frame and the supporting part of the mounting connector fixed on the installation plane are installed in a position limit to achieve the purpose of simplifying the installation steps. At the same time, the projection screen can be curled by the upper frame to realize the convenient transportation of the projection screen.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims

A projection screen structure, which is characterized in that it comprises a projection screen, an upper frame and installation connectors,

The projection screen is fixedly installed on a predetermined installation plane through the installation connector;

The upper frame includes a first mounting surface and a second mounting surface set opposite to the first mounting surface, wherein the first mounting surface is used for co-installation with the upper edge of the projection screen, and the second mounting surface Fold backward to form a mounting groove;

The mounting connector includes a fixing part, a supporting part, and a connecting part connecting the fixing part and the supporting part. The fixing part is fixedly installed at a preset installation position of the installation plane. The installation groove formed by the bending of the surface is limited and clamped for installation.
The projection screen structure according to claim 1, wherein the projection screen comprises a screen body and a cross bar fixed on the upper edge of the screen.
The projection screen structure according to claim 2, characterized in that the fixed connection between the projection screen body and the cross bar is realized by the way that one end of the cloth wraps up the cross bar, and the other end is glued to the screen body ；

Or, the projection screen body is fixedly connected to the crossbar by direct gluing.
3. The projection screen structure according to claim 2, wherein the first mounting surface is bent forward to form a receiving cavity, and the receiving cavity and the cross bar realize a limit installation connection.
The projection screen structure according to claim 1, wherein the installation connector is a first installation connector.
The projection screen structure of claim 5, wherein:

The first installation connecting piece is a supporting device;

Or the first installation connecting piece is a flatness adjusting device, which can adjust the displacement of the flatness adjusting device relative to the initial fixed position in a direction perpendicular to the installation plane;

There may be one or more first installation connections, which are fixed to a pre-set installation position on the installation plane. At the same time, the first installation connections that are fixedly installed at the installation position point are the same first installation connection Pieces, or a combination of different first installation connecting pieces.
The projection screen structure according to claim 1, wherein the projection screen structure further comprises a lower frame, and the lower frame has a structure symmetrical to the upper frame.
8. The projection screen structure according to claim 7, wherein the installation connection member is a second installation connection member.
The projection screen structure according to claim 8, wherein the second installation connecting member is a supporting device;

Or the second installation connecting piece is a flatness adjusting device, which can adjust the displacement of the flatness adjusting device relative to the initial fixed position in a direction perpendicular to the installation plane;

Or the second installation connecting member is a tension adjusting device, which can adjust the displacement of the tension adjusting device relative to the initial fixed position in a direction parallel to the installation plane;

Or the second installation connecting piece is a flatness and tension adjustment device, which can adjust the height of the flatness and tension adjustment device perpendicular to the installation plane direction, and can also adjust the flatness and tension adjustment device relative to the initial fixing The displacement of the position in the direction parallel to the installation plane;

There are one or more second installation connecting pieces, which are fixed to a pre-set installation position on the installation plane, and the second installation connecting pieces fixedly installed at the installation position point are the same second installation connecting pieces, or It is a combination of different second installation connections, wherein the installation number of the second installation connections is an even number, and the installation positions of the second installation connections are symmetrically distributed in the horizontal direction.
The projection screen structure according to claim 9, wherein there are four second installation connectors, which are fixed to four installation positions preset on the installation plane, and the four installation positions are horizontally distributed in the lateral direction. , Distributed vertically in the longitudinal direction.
7. The projection screen structure according to claim 7, wherein the projection screen structure further comprises a left frame and a right frame, and the left frame and the right frame are not directly connected.
11. The projection screen structure according to claim 11, wherein the connection between the left and right frames and the upper and lower frames adopts a cover for interference fit installation.