A curtain tensioner

Abstract

The application discloses a curtain tensioning device, which comprises a curtain for reflecting projected light, an end part and a middle part, a curtain frame for bearing the curtain, the end part and the middle part of the curtain being arranged on the light-incident side and the back light side of the curtain frame, a connecting piece arranged on the end part of the curtain for driving the curtain to move, a connecting clamping strip one end of which is clamped with the connecting piece and the other end of which is matched with the curtain frame for indirectly fixing the curtain on the curtain frame, and an adjusting piece arranged between the curtain frame and the connecting clamping strip for controlling the linear movement of the connecting clamping strip along the direction perpendicular to the frame of the curtain frame, thereby driving the connecting piece to move, and the two connecting pieces at the opposite ends forming opposite pulling forces on the curtain. The curtain tensioning device of the application is provided with corresponding linearly movable adjusting pieces, opposite pulling forces are applied on the curtain through the connecting clamping strip and the connecting piece to tension the curtain, the size of the tension of the curtain can be adjusted by adjusting the adjusting pieces, and different use requirements of users can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of curtain installation, in particular to a curtain tensioning device. BACKGROUND

[0002] At present, projection screens are divided into hard curtains and soft curtains, and there are different installation methods for the two. Taking a 100-inch light-resistant hard curtain as an example, the hard curtain is directly attached to a flat honeycomb aluminum plate or other metal plate, and the whole is packaged for delivery. This structure has the problems of inconvenient transportation and installation, for example, it is difficult to use an elevator to transport in a high-rise residence. Taking a soft curtain of hot-melt PVC curtain as an example, one way is to directly install a lifting reel on the screen to hang and install the soft curtain, but the flatness of the screen cannot be guaranteed when this installation method is used. Another way is to use fusion technology to wrap a hard rod in the soft curtain at both ends, wrap the curtain on the frame in a reverse way, and then set a plurality of springs corresponding to the screen frame behind the screen frame, and realize the installation of the soft curtain by stretching the springs. This way keeps the flatness of the screen by the tension of the springs, and also solves the problems of inconvenient installation and packaging and transportation of the existing screen, but this scheme cannot be applied to PET screens with a certain hardness. In addition, the use of springs for installation has many accessories and is complicated to install. The spring force is fixed in the design, and the tension of the curtain cannot be adjusted during use, that is, the tension of the curtain cannot be adjusted, which cannot meet the different needs of users. SUMMARY

[0003] The technical problem solved by the present application is to provide a curtain tensioning device to solve the problems of inconvenient transportation and installation of hard screens, fixed spring tension when using springs to tension the curtain, and inconvenient use due to the inability to adjust the tension of the curtain.

[0004] To solve the above technical problems, one technical solution adopted by the present application is to provide a curtain tensioning device, which comprises:

[0005] a curtain for reflecting projection light, the curtain comprising at least two opposite ends and a middle portion between the two ends;

[0006] a curtain frame for carrying the curtain, the curtain frame comprising an incident light surface and a back light surface, the incident light surface of the curtain frame carrying the middle portion, the back light surface of the curtain frame carrying the at least two opposite ends, the curtain frame being wrapped by the curtain from the incident light surface to the back light surface;

[0007] a connecting piece provided at the at least two opposite ends of the curtain for driving the curtain to move;

[0008] A connecting strip is arranged outside the connecting member, and one end of the connecting strip is connected with the connecting member, and the other end of the connecting strip is matched with the curtain frame, so as to indirectly fix the curtain on the curtain frame.

[0009] An adjusting member is arranged between the curtain frame and the connecting strip, and is used to control the linear movement of the connecting strip along the direction perpendicular to the frame of the curtain frame, so as to drive the movement of the connecting member. The two connecting members at the opposite ends form opposite pulling forces on the curtain.

[0010] The curtain frame comprises at least two opposite frames, and the two opposite frames are used to provide support force for the curtain. The curtain frame further comprises a connecting rod connected to the centers of the two opposite frames to support the two opposite frames.

[0011] The curtain frame comprises two opposite long frames and two opposite short frames, and the two short frames are connected to the two long frames in a head-to-tail manner.

[0012] The connecting part of the short frame and the long frame is provided with a fixing member. One end of the fixing member is connected with the short frame, and the other end of the fixing member is connected with the long frame, so as to fix the adjacent short frame and long frame as a whole.

[0013] The back surface of the curtain frame is provided with an outwardly extending mounting boss. The mounting boss is provided with a through hole penetrating through the mounting boss along the direction of the frame. The adjusting member is connected with the connecting strip through the through hole.

[0014] The mounting boss is arranged at one end of the curtain frame close to the center of the curtain frame, and an end boss is arranged at the end away from the center of the curtain frame.

[0015] The connecting part of the end part and the middle part of the curtain is in contact with the end boss, so that the middle part of the curtain is suspended.

[0016] One end of the connecting strip is a bayonet. The curtain is wrapped around the connecting member and is inserted into the bayonet, so that the connecting member is connected with the connecting strip.

[0017] The other end of the connecting strip is provided with an adjusting member mounting hole. The adjusting member enters the adjusting member mounting hole after penetrating through the through hole, so as to be connected with the connecting strip. When the adjusting member moves, the adjusting member forms a pulling force on the connecting member, the connecting strip and the curtain.

[0018] The adjusting member comprises a bolt and a nut. The nut is arranged at the end of the bolt, and is used to limit the bolt.

[0019] The adjusting member comprises a pull rod, a shaft and a cam.

[0020] The pull rod passes through the through hole and one end of the pull rod extends into the adjusting member mounting hole and the other end of the pull rod is threadedly connected with the shaft.

[0021] The cam is mounted on the shaft and rotates around the shaft, and the outer surface of the cam abuts against or is separated from the mounting boss during rotation, so that the pull rod drives the curtain to be tensioned or released.

[0022] The through hole and the adjusting member mounting hole correspond in position and the diameters of the through hole and the adjusting member mounting hole are adapted to the diameter of the adjusting member.

[0023] The adjusting member is a plurality of adjusting members, and the plurality of adjusting members are uniformly distributed on the curtain frame.

[0024] The curtain frame further comprises an outer frame and a corner covering member.

[0025] The outer frame is bolted to the curtain frame and wrapped outside the long side frame and the short side frame.

[0026] The corner covering member wraps the connection between the long side frame and the short side frame.

[0027] The curtain tensioning device further comprises a curtain carrier, the curtain is integrated with the curtain carrier, and the edge of the curtain carrier protrudes from the edge of the curtain.

[0028] The edge of the curtain carrier protruding from the edge of the curtain is folded to form a sleeve, and the connecting member is inserted into the sleeve.

[0029] The curtain tensioning device further comprises a sliding block.

[0030] One end of the curtain frame towards the center of the curtain frame is provided with a groove, and the wall body is provided with a fixed plate.

[0031] One end of the sliding block is inserted into the groove, and the other end of the sliding block is slidably connected with the fixed plate.

[0032] The curtain frame is further provided with a metal sheet, a magnet is mounted on the wall body, and the metal sheet and the magnet are magnetically attracted to each other, so that the curtain frame is fixed to the wall body.

[0033] The sliding block and the metal sheet are respectively arranged on opposite sides of the curtain frame.

[0034] Compared with the prior art, the curtain tensioning device has the beneficial effects that: the corresponding linearly movable adjusting member is arranged, opposite pulling forces are applied to the curtain through the connecting strip and the connecting member, the curtain is tensioned, the adjusting member is adjusted to adjust the size of the curtain tension, and different use requirements of users are met. BRIEF DESCRIPTION OF DRAWINGS

[0035] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0036] Figure 1 is a structural schematic view of a curtain frame embodiment;

[0037] Figure 2 is Figure 1 is a partial disassembled state schematic view of the curtain frame in the embodiment;

[0038] Figure 3 is Figure 1 is a side view of the frame of the curtain frame in the embodiment;

[0039] Figure 4 is a partial schematic view when the adjusting member is inserted into the curtain frame;

[0040] Figure 5 is Figure 4 is a sectional view of the embodiment;

[0041] Figure 6 is a structural schematic view of the connecting strip;

[0042] Figure 7 is Figure 6 is a side view of the embodiment;

[0043] Figure 8 is a partial view after the connecting member, the connecting strip and the curtain frame are installed;

[0044] Figure 9 is Figure 8 is a side view of the embodiment;

[0045] Figure 10 is Figure 9 is a side view after the adjusting member embodiment is installed;

[0046] Figure 11 is a structural schematic view of another adjusting member embodiment;

[0047] Figure 12 is a partial view of the outer frame and the corner covering member;

[0048] Figure 13 is a structural schematic diagram of the curtain and the curtain carrier;

[0049] Figure 14 is Figure 13 is a structural schematic diagram of the curtain carrier edge in the middle;

[0050] Figure 15 is a schematic diagram of the installation of the sliding block and the fixed plate;

[0051] Figure 16 is a schematic diagram of the installation of the metal sheet and the magnet;

[0052] Figure 17 is a schematic diagram of the overall structure of the curtain tensioning device of the present application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0054] The terms “first”, “second”, and the like in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product, or device.

[0055] Reference to “an embodiment” in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessary that every embodiment include the same features, structures, or characteristics. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] As Figure 9 and Figure 10As shown, the curtain tensioning device in the present application comprises a curtain 10, a curtain frame 1, a connecting piece 2, a connecting clamping strip 3 and an adjusting piece 4. The curtain 10 is used for reflecting projected light, and comprises at least two opposite end portions and an intermediate portion between the two end portions. The end portions are edge portions around the frame of the curtain frame 1, and the intermediate portion is a portion of the curtain 10 used for reflecting projected light. The curtain frame 1 is used for carrying the curtain 10, and comprises a light-incident surface and a back surface. The light-incident surface of the curtain frame carries the intermediate portion, and the back surface of the curtain frame carries the at least two opposite end portions. The curtain frame is wrapped by the curtain from the light-incident surface direction to the back surface direction.

[0057] The connecting piece 2 is arranged at the at least two opposite end portions of the curtain 10, and the length of the connecting piece 2 corresponds to the length of the frame of the curtain frame 1. Meanwhile, the connecting piece 2 can drive the curtain 10 to move, and is an intermediate element for tensioning the curtain 10, thereby avoiding damage to the curtain 10 caused by direct connection of the curtain 10 with other elements.

[0058] The connecting clamping strip 3 is arranged outside the connecting piece 2, and the length of the connecting clamping strip 3 corresponds to the length of the frame of the curtain frame 1. One end of the connecting clamping strip 3 is clamped with the connecting piece 2, so as to further clamp the curtain 10 with the connecting piece 2. The other end of the connecting clamping strip 3 is matched with the curtain frame 1, and is used for indirectly fixing the curtain 10 on the curtain frame 1.

[0059] Please continue to refer to Figure 10 The adjusting piece 4 is arranged between the curtain frame 1 and the connecting clamping strip 3, and is used for controlling the linear movement of the connecting clamping strip 3 in a direction perpendicular to the frame of the curtain frame 1, thereby driving the connecting piece 2 to move. The two connecting pieces 2 at the opposite ends form opposite pulling forces on the curtain 10, so that the curtain 10 is tensioned.

[0060] That is, the curtain 10, the connecting piece 2, the connecting clamping strip 3 and the adjusting piece 4 are arranged on the curtain frame 1. The curtain 10 is connected with the adjusting piece 4 through the connecting piece 2 and the connecting clamping strip 3. The adjusting piece 4 arranged at the corresponding two ends of the curtain 10 moves linearly in a direction perpendicular to the frame of the curtain frame 1, thereby driving the connecting clamping strip 3 and the connecting piece 2 to exert opposite pulling forces on the curtain 10, so that the curtain 10 is tensioned. When the adjusting piece 4 is adjusted, the displacement of the adjusting piece 4 in a direction perpendicular to the frame causes the pulling forces at the two ends of the curtain 10 to change, and the stretching degree and tension of the curtain 10 also change. Compared with the current spring structure for tensioning the curtain 10, the tensioning device is more flexible and can adjust the tension of the curtain 10 according to needs, thereby meeting different use requirements of users. The curtain tensioning device will be described in detail below.

[0061] In this application, the screen frame 1 supports the screen 10. During installation, the opposite ends of the screen 10 are wrapped around the screen frame 1 and connected to the screen frame 1 via connectors 2 and connecting clips 3. This allows the screen 10 to be opened on the light-incident surface of the screen frame 1, thereby receiving light projected from the projection device or laser TV. The screen 10 then reflects the projected light into the user's eyes, forming the image seen by the user. The screen 10 in this application is a soft screen or a PET screen with a certain degree of hardness. The hardness of the PET screen is between that of a traditional hard screen and a soft screen. For ease of explanation, as... Figure 9 As shown, the screen 10 is divided into two parts: one part is the end portion 100 with the connector 2, and the other part is the middle portion 200 located between the two opposing end portions 100. The end portion 100 is used to install the connector 2, and the middle portion 200 is used to reflect light during screen use. The end portion 100 and the middle portion 200 are located on the backlight surface and the light-incident surface of the screen frame 1, respectively.

[0062] The screen frame 1 in this application includes at least two opposing frames and a connecting rod connecting the two frames. The frames are used to support the end 100 of the screen 10, and the connecting rod is used to connect and support the two opposing frames. The screen frame 1 can have various forms, which will be described below through a specific embodiment.

[0063] In one embodiment, such as Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of screen frame 1. Figure 2 This is a partial disassembled schematic diagram of the screen frame 1. The screen frame 1 is rectangular in shape and includes two opposing long frames 11, two opposing short frames 12, and a connecting rod 13 connecting the two long frames 11. The two short frames 12 are connected end to end to the two long frames 11, and the connecting rod 13 is fixed in the middle of the two long frames 11. It can be understood that the connecting rod 13 mainly serves to further fix the screen frame 1. In other embodiments, this connecting rod 13 may not be provided. A fixing member 5 is provided at the connection between the short frame 12 and the long frame 11. When the short frame 12 and the long frame 11 are right angled, the fixing member 5 can be a right angle connector with two connecting parts. One end is connected to the short frame 12, and the other end is connected to the long frame 11, thereby fixing the adjacent short frame 12 and long frame 11 into one piece. When the short frame 12 and the long frame 11 are slanted, such as when the opposite edges of the short frame 12 and the long frame 11 are at a 45-degree angle, the fastener 5 can also be a corner connector to connect the short frame 12 and the long frame 11 with screws.

[0064] Please see Figure 3 , Figure 3As a side view of the frame of the curtain frame 1, the backlight surface of the curtain frame 1 in the embodiment is provided with an outwardly extending mounting boss 14, and the mounting boss 14 is provided with a through hole 15 penetrating the mounting boss in the frame direction. Please refer to Figure 4 and Figure 5 , Figure 4 As a partial view of the adjustment member inserted into the curtain frame, Figure 5 As a cross-sectional view of Figure 4 , the adjustment member 4 is connected with the connecting strip 3 through the through hole 15; the end portion 100 of the curtain 10 is on the same side as the mounting boss 14, and the middle portion 200 of the curtain 10 is located on the light entrance surface of the curtain frame 1. The mounting boss 14 is arranged on the backlight surface of the long frame 11 and the short frame 12, and is used for mounting and fixing the connecting strip 3, and at the same time, a space is formed on the backlight surface where the mounting boss 14 is located, which is used for accommodating the connecting member 2 and the connecting strip 3. One end of the connecting strip 3 abuts against the top surface of the mounting boss 14, and the other end is clamped with the connecting member 2 to control the movement of the curtain 10.

[0065] The mounting boss 14 in the embodiment is arranged on the curtain frame 1 near one end close to the center of the curtain frame 1, and an end boss 16 is arranged on the other end away from the center of the curtain frame 1; the connecting portion between the end portion 100 and the middle portion 200 of the curtain 10 is in contact with the end boss 16, so that the middle portion of the curtain 10 is suspended. The end boss 16 is the outer edge of the curtain frame 1, and protruding portions are formed on the light entrance surface and the backlight surface, respectively, and the curtain 10 is wound around the end boss 16, and is divided into the end portion 100 on the backlight surface and the middle portion 200 on the light entrance surface by the end boss 16. The top surface of the end boss 16 is in contact with the connecting portion between the end portion 100 and the middle portion 200 of the curtain frame 1, and the backlight surface and the light entrance surface of the end boss 16 are in contact with the end portion 100 and the middle portion 200 of the curtain, respectively, so that both ends of the middle portion 200 are supported, and the middle portion 200 is in a suspended state with the entire light entrance surface of the curtain frame, so as to maintain the flatness of the curtain 10 in use. If the end boss 16 is not arranged, the middle portion 200 of the curtain 10 is in contact with the entire light entrance surface of the curtain frame 1, and the flatness of the curtain frame 1 affects the flatness of the curtain 10. The arrangement of the end boss 16 makes both ends of the curtain 10 only in contact with the protruding portions of the end boss 16, and the remaining portions are suspended, so as to avoid that the flatness of the entire curtain frame 1 affects the flatness of the curtain 10.

[0066] The connecting piece 2 in the present application is arranged at the end of the curtain frame 1 and is clamped with the connecting clamping strip 3, that is, the connecting piece 2 is connected with the connecting clamping strip 3 together with the curtain 10. The number of the connecting piece 2 is at least two, which are arranged at two opposite ends of the curtain 10, so that the curtain 10 can be stretched and tensioned. The number of the connecting piece 2 can also be multiple, which are arranged at each end of the curtain 10, so that the tension of the curtain 10 is more balanced. Generally, the shape of the curtain 10 is rectangular, which has two long sides and two short sides. Therefore, four connecting pieces 2 are arranged on the four sides of the curtain 10 in the present application, which can exert four directions of tension on the curtain 10, so that the tension of the curtain 10 is more balanced, the flatness of the curtain 10 reaches the preset flatness, and the projection performance requirement is met, and the reflection effect of the light is better.

[0067] The connecting clamping strip 3 in the present application is a middle connecting structure, one end of which is used for connecting the connecting piece 2, and the other end of which is connected with the curtain frame 1, so that one end of the curtain 10 is fixed on the curtain frame 1.

[0068] In one embodiment, please refer to Figure 6 and Figure 7 , Figure 6 which are structural diagrams of the connecting clamping strip, Figure 7 which is a side view of Figure 6 . One end of the connecting clamping strip 3 is a clamping opening 31, the curtain 10 wraps the connecting piece 2 and is clamped into the clamping opening 31, so that the connecting piece 2 is clamped with the connecting clamping strip 3, and the end 100 of the curtain 10 is also clamped into the connecting clamping strip 3. The other end of the connecting clamping strip 3 is provided with an adjusting piece mounting hole 32, the adjusting piece 4 enters the adjusting piece mounting hole 32 after passing through the through hole 15 of the mounting boss 14, so as to be connected with the connecting clamping strip 3. When the adjusting piece 4 moves, the tension is formed on the connecting piece 2, the connecting clamping strip 3 and the curtain 10. The length of the connecting clamping strip 3 is matched with the length of the long side frame 11 and the short side frame 12. The clamping opening 31 can be a hollow cylinder with one side opening. The connecting piece 2 together with the curtain 10 is clamped into the clamping opening 31. The lower end of the clamping opening 31 is a cuboid with a cavity formed inside. The adjusting piece mounting hole 32 is arranged at the bottom of the cuboid and is arranged along the radial direction of the connecting clamping strip 3. When the curtain 10 is installed, the bottom surface of the cuboid is in contact with the top surface of the mounting boss 14. The positions of the adjusting piece mounting hole 32 and the through hole 15 are corresponding. The adjusting piece 4 is inserted from the bottom of the mounting boss 14, passes through the through hole 15 and then enters the adjusting piece mounting hole 32, so as to be connected with the connecting clamping strip 3. The adjusting piece 4 drives the connecting clamping strip 3 to move, and the connecting clamping strip 3 drives the connecting piece 2 and the curtain 10 to move. By adjusting the position of the adjusting piece 4 on the curtain frame 1 and changing the tension of the adjusting piece 4 on the curtain 10, the tension of the curtain 10 can be adjusted, so as to adjust the flatness of the curtain 10, and the tension of the curtain 10 is adjustable.

[0069] The through hole 15 and the adjusting member mounting hole 32 in the present application correspond in position, and the hole diameters are adapted to the diameter of the adjusting member 4. In a specific embodiment, the hole diameter of the through hole 15 can be slightly larger than the diameter of the adjusting member 4, and the hole diameter of the adjusting member mounting hole 32 is equal to the diameter of the adjusting member 4, facilitating installation and adjustment of the tension of the curtain 10.

[0070] Corresponding to the connecting card strip 3 in the above embodiment, the connecting member 2 is a cylindrical glass fiber rod. The glass fiber rod is a composite material using glass fiber and its products (glass cloth, tape, felt, yarn, etc.) as reinforcing material and synthetic resin as matrix material, and has the advantages of light weight and high strength, and can withstand large bending and shearing stress. In the present application, the connecting member 2 needs to transfer tension during installation and use, so the connecting member 2 is set as a cylindrical glass fiber rod, which can be directly inserted into the card hole 31 of the connecting card strip 3 during installation, simple and fast, and can withstand large tension, meeting the strength requirements of use, and also reducing the weight of the entire curtain tensioning device.

[0071] The connecting member 2 in the present embodiment can be an integral rod, inserted from one end of the card hole 31 of the connecting card strip 3. Since the diameter of the connecting member 2 is larger than the opening of the buckle 31, and the tension borne by the connecting member 2 is only to tension the curtain 10, the tension is not too large, so the connecting member 2 cannot be detached from the card hole 31. In another embodiment, the connecting member 2 can be divided into two parts, inserted from both ends of the card hole 31, to facilitate installation and disassembly. The installation relationship between the connecting member 2, the connecting card strip 3 and the curtain frame 1 of the present application is shown in Figures 8-10 , Figure 8 is a partial view of the connecting member, the connecting card strip and the curtain frame after installation, Figure 9 is Figure 8 a side view, Figure 10 is Figure 9 a side view after installation of the adjusting member.

[0072] The adjusting member 4 in the present application can have various forms, as long as it can pass through the through hole 15 of the mounting boss 14 and the adjusting member mounting hole 32 of the connecting card strip 3, and be connected with the connecting card strip 3, so as to drive the connecting card strip 3 to move.

[0073] In one embodiment, the adjusting member 4 comprises a bolt and a nut, the nut is arranged at the end of the bolt for limiting the bolt. The installation method is to insert the bolt into the through hole 15 from the bottom of the installation boss 14, then pass through the adjusting member installation hole 32, and then connect the nut with the bolt, so that the bolt is clamped in the connecting clamping strip 3, the up and down movement of the bolt drives the connecting clamping strip 3, the connecting member 2 and the curtain 10 to move together, thereby tensioning the curtain 10, at this time, adjusting the position of the adjusting bolt can adjust the tension of the curtain 10, and compared with using a spring to adjust the tension of the screen, using the bolt to adjust the tension of the screen can make up for the defect that the fixed elastic force of the spring cannot be adjusted after being tensioned, and further enhance the installation and adjustment reliability of the curtain tensioning device.

[0074] In another embodiment, as shown in Figure 11 Figure 11 The adjusting member is another embodiment of the structure schematic diagram, the adjusting member 4 comprises a pull rod 41, a shaft 42 and a cam 43; the pull rod 41 passes through the through hole 15, and one end extends into the adjusting member installation hole 32, and the other end is threadedly connected with the shaft 42; the cam 43 is installed on the shaft 42 and rotates around the shaft 42, the outer surface of the cam 43 is in abutment or disengagement with the installation boss 14 during rotation, thereby driving the pull rod 41 to tension or release the curtain 10. The pull rod 41 has the same effect as the bolt in the above embodiment, the shaft 42 is perpendicular to the pull rod 41, and the cam 43 can rotate around the shaft 42. The outer surface of the cam 43 is an irregular arc, the radii of a plurality of arcs are different, when the cam 43 rotates to the arc with a larger radius, the outer surface of the cam 43 is in abutment with the installation boss 14, when the cam 43 rotates to the arc with a smaller radius, the outer surface of the cam 43 is disengaged from the installation boss 14, the distance between the cam 43 and the installation boss 14 changes constantly during rotation, and the pulling force applied to the pull rod 41 is also different, thereby adjusting the tension of the curtain 10. Compared with the bolt and the nut in the above embodiment, the rotation of the cam 43 is used to adjust the tension of the curtain 10 in this embodiment, the adjusting efficiency is higher, and the rapid installation and debugging of the curtain 10 are realized.

[0075] The number of the adjusting member 4 of the present application is multiple, and the multiple adjusting members 4 are uniformly distributed on the curtain frame 1. Similarly, the number of the through hole 15 and the adjusting member installation hole 32 matches the number of the adjusting member 4. In this embodiment, 8 groups of adjusting members 4 are arranged on the long side frame 11 of the curtain frame 1, and 4 groups of adjusting members 4 are arranged on the short side frame 12. Similarly, 8 through holes 15 and 8 adjusting member installation holes 32 are correspondingly arranged on the long side frame 11, and 4 through holes 15 and 4 adjusting member installation holes 32 are correspondingly arranged on the short side frame 12, so that the tension of the curtain 10 is adjusted by multiple adjusting members 4, the tension of each area of the curtain 10 is adjusted respectively, thereby making the whole curtain 10 reach the required flatness.

[0076] ​The curtain frame 1 in the embodiment is further provided with an outer frame 6 and a corner covering member 7. Please refer to Figure 12 , Figure 12 which are partial views of the outer frame and the corner covering member. The outer frame 6 is bolted to the curtain frame 1 and covers the outer part of the long side frame 11 and the short side frame 12. The corner covering member 7 covers the joint of the long side frame 11 and the short side frame 12. The outer frame 6 and the corner covering member 7 are used to protect the curtain frame 1 from damage caused by impact. At the same time, the outer frame 6 and the corner covering member 7 can hide the bolt holes and bolts and cover the edges of the curtain 10, thus playing a decorative and beautifying role.

[0077] The curtain tensioning device in the present application further comprises a curtain bearing member 20. Please refer to Figure 13 and Figure 14 , Figure 13 which are structural schematic views of the curtain and the curtain bearing member, Figure 14 which is a structural schematic view of the edge of the curtain bearing member. The curtain 10 is combined with the curtain bearing member 20 as a whole, and the edge of the curtain bearing member 20 protrudes from the edge of the curtain 10. The edge of the curtain bearing member 20 that protrudes from the curtain 10 is folded to form a sleeve 30, and the connecting member 2 is inserted into the sleeve 30. The curtain bearing member 20 in the embodiment is made of nylon cloth and is slightly larger in size than the curtain 10. Each edge of the curtain bearing member 20 protrudes from the edge of the curtain 10 by 30-40 mm and covers the back of the curtain 10. The curtain bearing member 20 can be combined with the curtain 10 by being pasted with adhesive or the curtain 10 can be sewn to the edge of the curtain bearing member 20. The edge of the curtain bearing member 20 that protrudes is folded and fixed to form the sleeve 30. The sleeve 30 is a circular sleeve and has a diameter slightly larger than the diameter of the connecting member 2, so that the connecting member 2 can be easily placed in the sleeve 30. The purpose of the curtain bearing member 20 is to enable the curtain bearing member 20 to be pulled when the tension of the curtain 10 is adjusted, so as to tighten the curtain 10. The curtain 10 is not directly subjected to a large pulling force, thus preventing the curtain 10 from being damaged and improving the service life of the curtain 10.

[0078] The curtain tensioning device in the embodiment further comprises a sliding block 8. Please refer to Figure 3 and Figure 15 , Figure 15The installation diagram of the slide block and the fixed plate is shown in the figure, the curtain frame 1 is provided with a groove 17 at one end of the rectangle formed by the curtain frame 1, and the fixed plate 40 is arranged on the wall; one end of the slide block 8 is inserted into the groove 17, and the other end is slidably connected with the fixed plate 40. The groove 17 is formed at the opposite side of the upper end boss 16 of the curtain frame 1, one end of the slide block 8 is formed in a stepped shape and is inserted into the groove 17 for fixation, and the other end is slidably connected with the fixed plate 40; the fixed plate 40 is provided with a sliding groove, and the slide block 8 can slide along the sliding groove on the fixed plate 40. Generally, the sliding groove of the fixed plate 40 is fixed in the vertical direction of the wall surface, so that the curtain frame 1 can be moved along the vertical direction of the wall surface through the sliding of the slide block 8, and the fixed position of the curtain frame 1 on the wall can be adjusted. At the same time, the slide block 8 can also slide in the groove 17, so that the curtain frame 1 can be displaced horizontally left and right, and the horizontal position of the curtain frame 1 can be adjusted.

[0079] The curtain frame 1 in the embodiment is also provided with a metal sheet 9, please refer to Figure 16 , Figure 16 The installation diagram of the metal sheet and the magnet is shown in the figure, the magnet 50 is arranged on the wall, and the metal sheet 9 is magnetically attracted to the magnet 50, so that the curtain frame 1 is fixed on the wall. In this way, when the curtain frame 1 is installed, one side of the curtain frame 1 can be fixed and positioned first, and then the other side can be adjusted in position, which is convenient for positioning during installation.

[0080] The slide block 8 and the metal sheet 9 in the embodiment are respectively arranged on the opposite two sides of the curtain frame 1. Further, the slide block 8 and the metal sheet 9 are respectively arranged on the two long side frames 11 of the curtain frame 1, please refer to Figure 17 , Figure 17 The overall structure diagram of the curtain tensioning device is shown in the figure, the slide block 8 is arranged on the upper long side frame 11, and the metal sheet 9 is arranged on the lower long side frame 11, so that the height of the curtain frame 1 on the wall can be adjusted more conveniently. Of course, the slide block 8 and the metal sheet 9 can also be arranged on the two short side frames 12 of the curtain frame 1, so that the curtain frame 1 can be moved in the horizontal direction.

[0081] The curtain tensioning device of the application is provided with corresponding linearly movable adjusting members, opposite pulling forces are applied to the curtain through the connecting clamping strip and the connecting member, the curtain is tensioned, the size of the curtain tension can be adjusted by adjusting the adjusting members, different use requirements of users can be met; the screw or the cam cooperated with the pull rod is used to replace the existing spring to adjust the tensioning force of the screen, the fixed elastic force after the spring is tensioned cannot be adjusted, the defect that the tension cannot be adjusted is compensated, and the installation and adjustment reliability of the curtain tensioning device is further enhanced; the connecting member is arranged in the sleeve of the screen bearing member and buckled in the clamping opening of the connecting clamping strip, the damage to the curtain can be effectively avoided, the stress on the curtain is more balanced, the curtain is prevented from being damaged, and the service life of the curtain is improved.

[0082] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A curtain tensioning device, characterized in that, The curtain tensioning device comprises: a curtain for reflecting projected light, the curtain comprising at least two opposite ends and a middle portion between the two ends; a curtain frame for bearing the curtain, the curtain frame comprising an incident surface and a back surface, the incident surface of the curtain frame bearing the middle portion, the back surface of the curtain frame bearing the at least two opposite ends, the curtain frame being wrapped by the curtain from the incident surface to the back surface; a connecting piece provided at the at least two opposite ends of the curtain for driving the curtain to move; a connecting strip provided outside the connecting piece, one end of the connecting strip being connected with the connecting piece and the other end being matched with the curtain frame for indirectly fixing the curtain on the curtain frame; an adjusting piece provided between the curtain frame and the connecting strip for controlling the connecting strip to move linearly in a direction perpendicular to the frame of the curtain frame, thereby driving the connecting piece to move, the two connecting pieces at opposite ends generating opposite pulling forces on the curtain; a curtain bearing piece, the curtain being integrated with the curtain bearing piece, the edge of the curtain bearing piece protruding from the edge of the curtain; the edge of the curtain bearing piece protruding from the edge of the curtain is folded to form a sleeve, and the connecting piece is inserted into the sleeve; the back surface of the curtain frame is provided with an outwardly extending mounting boss, the mounting boss is provided with a through hole penetrating through the mounting boss in the direction of the frame, and the adjusting piece passes through the through hole and is connected with the connecting strip; one end of the connecting strip is a bayonet, the curtain wraps the connecting piece and is clamped into the bayonet, so that the connecting piece is connected with the connecting strip; the other end of the connecting strip is provided with an adjusting piece mounting hole, the adjusting piece enters the adjusting piece mounting hole after passing through the through hole, so as to be connected with the connecting strip, and the adjusting piece generates pulling force on the connecting piece, the connecting strip and the curtain when moving.

2. A curtain tensioner as claimed in claim 1, wherein The curtain frame comprises at least two opposite frames for providing support force to the curtain, and a connecting rod connected to the centers of the two opposite frames to support the two opposite frames.

3. A curtain tensioner as claimed in claim 1, wherein The curtain frame comprises two opposite long frames and two opposite short frames, and the two short frames are connected to the two long frames in a head-to-tail manner. The connection between the short frame and the long frame is provided with a fixing piece, one end of the fixing piece is connected with the short frame, and the other end is connected with the long frame, so as to fix the adjacent short frame and long frame as a whole.

4. The curtain tensioning device of claim 1, wherein, The mounting boss is provided on one end of the curtain frame close to the center of the curtain frame, and an end boss is provided on the other end away from the center of the curtain frame. The connecting part of the end of the curtain and the middle portion is in contact with the end boss, so that the middle portion of the curtain is suspended.

5. The curtain tensioning device of claim 1, wherein, The adjusting piece comprises a bolt and a nut, the nut is provided at the end of the bolt for limiting the bolt.

6. The curtain tensioning device of claim 1, wherein, The adjusting piece comprises a pull rod, a shaft and a cam. The pull rod passes through the through hole and one end of the pull rod extends into the adjusting member mounting hole and the other end is screwed with the shaft; The cam is mounted on the shaft and rotates around the shaft, and the outer surface of the cam abuts against or is separated from the mounting boss during rotation, so that the pull rod drives the curtain to be tensioned or released.

7. A curtain tensioning device according to claim 6, characterised in that The through hole and the adjusting member mounting hole correspond in position and have diameters matching the diameter of the adjusting member.

8. A curtain tensioner as claimed in claim 7, wherein, The adjusting member is a plurality of adjusting members which are uniformly distributed on the curtain frame.

9. A curtain tensioning device according to claim 3, wherein, The curtain frame is further provided with an outer frame and a corner covering member. The outer frame is bolted with the curtain frame and wrapped outside the long side frame and the short side frame. The corner covering member wraps the joint of the long side frame and the short side frame.

10. The curtain tensioning device of claim 1, wherein, The curtain frame is further provided with a sliding block. One end of the curtain frame towards the center of the curtain frame is provided with a groove, and the wall is provided with a fixed plate. One end of the sliding block is inserted into the groove and the other end is slidably connected with the fixed plate.

11. A curtain tensioning device according to claim 10, wherein, The curtain frame is further provided with a metal sheet, and the wall is provided with a magnet, and the metal sheet and the magnet are magnetically attracted to fix the curtain frame on the wall.

12. A curtain tensioner as claimed in claim 11, wherein, The sliding block and the metal sheet are respectively arranged on opposite sides of the curtain frame.

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