Lifting projection curtain

Abstract

The utility model relates to a lifting projection curtain which comprises a base, a lifting mechanism arranged on the base, a locking mechanism and a limiting guide mechanism. A driving reel is rotatably arranged on the base, a curtain is wound on the driving reel, one end of the curtain is connected to the driving reel, and the other end of the curtain is connected to the lifting mechanism; the lifting mechanism is hinged to the base, and the lifting mechanism can rotate between a curtain unfolding position and a curtain storage position relative to the base so as to drive the curtain to ascend and descend; the locking mechanism comprises a lock body arranged on the base and a lock head arranged on the lock body, and the lock head can telescopically move relative to the lock body so as to limit rotation of the lifting mechanism; and the limiting guide mechanism is arranged on a rotating path of the lifting mechanism. The lifting projection curtain designed by the utility model can lift stably, has a good anti-seismic effect, and can bring good film watching experience.

Description

TECHNICAL FIELD

[0001] The utility model relates to projection curtain technical field especially, relates to a lift projection curtain. BACKGROUND

[0002] With the development of society and the improvement of people's living standards, the car has not only a kind of transport tool, and people have more diversified demand to the function and use experience of car, especially in the car entertainment. At present, the car in the audio-visual aspect can only use the car display screen in the car, and the size of the car display screen is smaller, and the viewing experience is poor. Some car owners have certain demand for better car environment atmosphere, how to realize the car large screen viewing and not occupy the car space is a problem to be solved, so the car projection product that can solve the above problems arises at the historic moment. However, the car will produce vibration and jolt in the process of driving, and ordinary curtain lacks effective fixing and stabilizing measures, is easy to appear to sway, shift and other problems, seriously affects the stability of projection picture and viewing experience. CONTENT OF THE UTILITY MODEL

[0003] In view of the above existing problems, the utility model aims at designing a lift projection curtain, which can stably lift and has good shock resistance, and can bring good viewing experience.

[0004] The utility model aims at the following technical scheme to realize the purpose:

[0005] A lift projection curtain is designed, which comprises a base, a lifting mechanism arranged on the base, a locking mechanism and a limiting guide mechanism. A driving spool is rotatably arranged on the base. A curtain is wound on the driving spool. One end of the curtain is connected to the driving spool, and the other end is connected to the lifting mechanism. The lifting mechanism is hingedly connected to the base. The lifting mechanism can rotate relative to the base between a curtain unfolding position and a curtain storage position to drive the curtain to lift. The locking mechanism comprises a lock body arranged on the base and a lock head arranged on the lock body. The lock head can be telescopically moved relative to the lock body to limit the rotation of the lifting mechanism. The limiting guide mechanism is arranged on the rotation path of the lifting mechanism.

[0006] The lifting projection curtain designed in the scheme is installed in the vehicle interior, the base is fixed to the top of the vehicle, and the base integrated design is adopted to reduce the occupied space. The curtain is automatically and stably lifted through the cooperation of the driving reel and the lifting mechanism. The lifting mechanism is hinged to the base and can rotate relative to the base between the curtain unfolding position and the curtain storage position to drive the curtain to lift. After the curtain is completely unfolded, the locking mechanism can lock the lifting mechanism to prevent it from rotating, which helps to form a stable frame structure for the projection screen, enhances the shock resistance of the curtain, and prevents the curtain position from changing due to accidental touching or other external forces, ensuring the stability and safety during use. At the same time, the limiting guide mechanism is arranged on the base to play the role of precise guidance and limitation, ensuring that the lifting mechanism moves according to the predetermined track and position, and ensuring that the lifting mechanism rotates back to the correct position of the curtain storage position, avoiding the problem of deviation and shaking of the lifting mechanism due to vibration in the driving state of the vehicle.

[0007] Further, the lifting mechanism includes at least one set of lifting assemblies, and each lifting assembly includes a hollow first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the base, and the other end is hinged to one end of the second connecting rod.

[0008] The number of lifting assemblies is related to the size of the curtain. When the size of the curtain is small, one set can meet the use requirement. When the size of the curtain is large, at least one set is arranged on each side of the curtain to ensure the unfolding requirement of the curtain. The lifting assembly includes a hollow first connecting rod and a second connecting rod. When the curtain is completely unfolded, the first connecting rod and the second connecting rod form a certain angle to form a stable structure.

[0009] Further, the lifting mechanism further includes a connecting plate, one end of the second connecting rod away from the first connecting rod is hinged to the connecting plate, and the connecting plate is provided with a clamping groove for clamping and fixing one end of the curtain.

[0010] The connecting plate is in the form of a long strip plate, and the length thereof is not less than the width of the curtain. The end of the curtain can be wound on the clamping member in the form of a strip. The clamping member is clamped and embedded in the clamping groove to realize the connection between the curtain and the connecting plate. This connection mode is simple to operate, and the curtain is uniformly stressed and stably connected.

[0011] Further, the end of the first connecting rod hinged to the base is provided with a lock tongue matched with the lock head, and the lock head is arranged on the rotation path of the lock tongue. When the first connecting rod is in the curtain unfolding position, the lock tongue is located between the lock head and the base. When the first connecting rod is in the curtain storage position, the lock head is located between the lock tongue and the base.

[0012] When the curtain is stored, the lock head is located between the lock tongue and the base, and during the process of unfolding the curtain, the lock tongue rotates around the pin shaft and abuts against the lock head, driving the lock head to retract and move until the curtain is completely unfolded, the lock tongue rotates to below the lock head, and the lock head rebounds to reset to engage with the lock tongue, limiting the rotation of the first connecting rod and improving the anti-shock effect of the curtain.

[0013] Further, the lock head comprises a limiting surface and an inclined guide surface, the guide surface extends downward from one end close to the lock body to one end close to the first connecting rod.

[0014] By setting the inclined guide surface, a wedge effect is formed between the lock tongue and the guide surface, and during the rotation process, the lock tongue abuts against the guide surface to form a pushing force to make the lock head retract and move. After the curtain is completely unfolded, the lock tongue rotates to below the lock head, the lock head rebounds to reset, and the limiting surface engages with the lock tongue.

[0015] Further, the second connecting rod is provided with a hinge joint at one end close to the first connecting rod, the first connecting rod is provided with a hinge seat matched with the hinge joint, the hinge joint comprises limiting protrusions arranged at intervals, the hinge seat is located between the two limiting protrusions, and the hinge seat is provided with a limiting platform corresponding to the limiting protrusions.

[0016] The hinge seat and the hinge joint are hingedly connected through a pin shaft, the limiting platform and the limiting protrusions form a surface contact constraint, the first connecting rod and the second connecting rod are constrained at a preset rotation angle, and after the curtain is completely unfolded, the limiting protrusions are in surface contact with the limiting platform, thereby improving the stability between the first connecting rod and the second connecting rod.

[0017] Further, the limiting guide mechanism comprises a hollow guide pipe, the guide pipe comprises two vertical and parallel guide surfaces, the distance between the two guide surfaces is smaller than the distance between the two limiting protrusions, and the two guide surfaces are arranged on the movement path of the limiting protrusions.

[0018] When the lifting mechanism falls back to the curtain storage position, the two limiting protrusions clamp the guide pipe to form a guide coupling structure, guiding the lifting mechanism to fall back into place, limiting the lifting mechanism that falls back into place, and avoiding the problems of deviation and shaking of the lifting mechanism due to vibration in the driving state of the vehicle.

[0019] Further, a point touch switch is arranged in the guide pipe, and the connecting plate contacts the point touch switch when falling to the curtain storage position.

[0020] The point-touch switch is used for controlling the driving roller to move, when the curtain is stored, the connecting plate is gradually lowered, the connecting plate touches the elastic sheet of the point-touch switch and presses the elastic sheet to make the elastic sheet contact with the switch contact, the point-touch switch transmits the signal of the connecting plate being lowered to the position to the controller to control the driving roller to stop moving.

[0021] Further, the lifting mechanism further comprises an elastic assembly, elastic potential energy of the elastic assembly can act on the lifting assembly to make the curtain be tensioned during the curtain being unfolded, the elastic assembly comprises a first elastic member arranged in the first connecting rod and / or a second elastic member arranged in the second connecting rod, and a cable arranged in the first connecting rod and the second connecting rod.

[0022] The first connecting rod and the second connecting rod can be smoothly rotated by the elastic potential energy of the elastic assembly to make the curtain be unfolded and kept in the tensioned state. The elastic member can be arranged in one group or two groups, for example, two groups, the first elastic member is fixed in the first connecting rod, the second elastic member is fixed in the second connecting rod, the two are connected by the cable and are in the stretched state. When the first connecting rod and the second connecting rod are rotated to the curtain storage position, the first elastic member and the second elastic member are further stretched to store the elastic potential energy. During the curtain being unfolded, the driving roller is rotated to release the curtain, the first connecting rod and the second connecting rod are rotated under the elastic potential energy of the first elastic member and the second elastic member to drive the curtain to rise, and the curtain is always kept in the tensioned state.

[0023] Further, the first connecting rod is provided with a embedding groove near the end of the second connecting rod, the cable is embedded through the embedding groove.

[0024] The cable is limited by the embedding groove to avoid the cable being deviated and the problems of the first connecting rod and the second connecting rod being stuck.

[0025] Compared with the prior art, the utility model has the advantages of:

[0026] The lifting projection curtain designed in the scheme is installed in the vehicle interior, the base is fixed to the top of the vehicle, the base integrated design is adopted, and the occupied space is reduced. The curtain is automatically and stably lifted through the cooperation of the driving reel and the lifting mechanism. The lifting mechanism is hinged to the base and can rotate relative to the base between the curtain unfolding position and the curtain storage position to drive the curtain to lift. After the curtain is completely unfolded, the locking mechanism can lock the lifting mechanism to prevent it from rotating, which helps to form a stable frame structure for the projection screen, enhances the anti-vibration performance of the curtain, prevents the curtain position from being changed due to accidental touch or other external force, and ensures the stability and safety during use. Meanwhile, the limiting guide mechanism is arranged on the base, which plays a precise guiding and limiting role, ensures that the lifting mechanism moves according to the predetermined track and position, ensures that the lifting mechanism rotates back to the correct position of the curtain storage position, and avoids the problems of deviation and shaking of the lifting mechanism due to vibration in the driving state of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of the front of the lifting projection curtain of an embodiment of the utility model.

[0028] Figure 2 It is a structure schematic view of the back of the lifting projection curtain of an embodiment of the utility model.

[0029] Figure 3 It is a structure schematic view of the storage state of the lifting projection curtain of an embodiment of the utility model.

[0030] Figure 4 It is a structure schematic view of the lifting assembly of an embodiment of the utility model.

[0031] Figure 5 It is a local structure schematic view of the connecting plate of an embodiment of the utility model.

[0032] Figure 6 It is a local structure schematic view of the cooperation of the first connecting rod of the curtain unfolding position and the locking mechanism of an embodiment of the utility model.

[0033] Figure 7 It is a local structure schematic view of the cooperation of the first connecting rod of the curtain storage position and the locking mechanism of an embodiment of the utility model.

[0034] Figure 8 It is Figure 3 It is an enlarged view of A.

[0035] ILLUSTRATION: 1, base; 2, lifting mechanism; 21, lifting assembly; 22, connecting plate; 221, clamping groove; 211, first connecting rod; 212, second connecting rod; 2111, lock tongue; 2112, hinged seat; 2113, limiting table; 2114, embedding groove; 2121, hinged joint; 2122, limiting protrusion; 23, elastic assembly; 231, first elastic piece; 232, second elastic piece; 233, inhaul; 3, locking mechanism; 31, lock body; 32, lock head; 321, limiting surface; 322, guide surface; 4, limiting guide mechanism; 41, guide pipe; 42, point touch switch; 411, guide surface; 5, drive reel; 6, curtain. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein.

[0037] As Figures 1 to 3 shown, the present embodiment provides a lifting projection curtain, which is used in vehicle interior, is fixedly installed on the top of the vehicle. Of course, the practical scene of the lifting projection curtain of the present embodiment is not limited to the vehicle, and can also be used in other suitable scenes, such as being installed on indoor wall, etc. The lifting projection curtain comprises a base 1, a lifting mechanism 2, a locking mechanism 3 and a limiting guide mechanism 4, which are arranged on the base 1; a drive reel 5 is rotatably arranged on the base 1, a curtain 6 is wound on the drive reel 5, one end of the curtain 6 is connected to the drive reel 5, and the other end of the curtain 6 is connected to the lifting mechanism 2; the drive reel 5 is controlled by a controller to rotate to wind or release the curtain 6. The lifting mechanism 2 is hinged to the base 1, and the lifting mechanism 2 can rotate relative to the base 1 between a curtain unfolding position and a curtain storage position to drive the curtain 6 to lift; the curtain unfolding position is the limit position of the lifting mechanism 2 relative to the base 1 to move away from the base 1, at this time the lifting mechanism 2 cannot continue to rotate, and the curtain 6 is completely unfolded; the curtain storage position is the limit position of the lifting mechanism 2 relative to the base 1 to move close to the base 1, at this time the lifting mechanism 2 cannot continue to rotate, and the curtain 6 is completely wound on the drive reel 5; the locking mechanism 3 comprises a lock body 31 arranged on the base 1 and a lock head 32 arranged on the lock body 31, the lock head 32 can move relative to the lock body 31 to limit the rotation of the lifting mechanism 2; the lock body 31 is fixed on the base 1 by screws, bolts or rivets, in order to improve the stability of the lock body installation, the base 1 is provided with a slot along the length direction, the lock body 31 is provided with a plug piece on both sides matched with the slot, the lock body 31 is slid into the slot through the plug piece and moved to the fixed position, and then the slot wall is pressed tightly to the plug piece to fix the lock body 31 by screws, bolts or rivets.

[0038] As Figure 2 shown, the present embodiment provides a lifting projection curtain, which is used in vehicle interior, is fixedly installed on the top of the vehicle. Of course, the practical scene of the lifting projection curtain of the present embodiment is not limited to the vehicle, and can also be used in other suitable scenes, such as being installed on indoor wall, etc. The lifting projection curtain comprises a base 1, a lifting mechanism 2, a locking mechanism 3 and a limiting guide mechanism 4, which are arranged on the base 1; a drive reel 5 is rotatably arranged on the base 1, a curtain 6 is wound on the drive reel 5, one end of the curtain 6 is connected to the drive reel 5, and the other end of the curtain 6 is connected to the lifting mechanism 2; the drive reel 5 is controlled by a controller to rotate to wind or release the curtain 6. The lifting mechanism 2 is hinged to the base 1, and the lifting mechanism 2 can rotate relative to the base 1 between a curtain unfolding position and a curtain storage position to drive the curtain 6 to lift; the curtain unfolding position is the limit position of the lifting mechanism 2 relative to the base 1 to move away from the base 1, at this time the lifting mechanism 2 cannot continue to rotate, and the curtain 6 is completely unfolded; the curtain storage position is the limit position of the lifting mechanism 2 relative to the base 1 to move close to the base 1, at this time the lifting mechanism 2 cannot continue to rotate, and the curtain 6 is completely wound on the drive reel 5; the locking mechanism 3 comprises a lock body 31 arranged on the base 1 and a lock head 32 arranged on the lock body 31, the lock head 32 can move relative to the lock body 31 to limit the rotation of the lifting mechanism 2; the lock body 31 is fixed on the base 1 by screws, bolts or rivets, in order to improve the stability of the lock body installation, the base 1 is provided with a slot along the length direction, the lock body 31 is provided with a plug piece on both sides matched with the slot, the lock body 31 is slid into the slot through the plug piece and moved to the fixed position, and then the slot wall is pressed tightly to the plug piece to fix the lock body 31 by screws, bolts or rivets.Figure 5 As shown, the lifting mechanism 2 comprises two groups of lifting assemblies 21 and a connecting plate 22 provided with a clamping groove 221 for clamping one end of the curtain 6. The connecting plate 22 is in the shape of a long strip plate, and its length is not less than the width of the curtain 6. The end of the curtain 6 can be wound on the clamping member in the shape of a strip, and the curtain 6 is connected with the connecting plate 22 by clamping the clamping member into the clamping groove 221. This connection mode is simple to operate, and the curtain is uniformly stressed and stably connected. The number of the lifting assemblies 21 is related to the size of the curtain 6. When the size of the curtain 6 is small, one group can meet the use requirement, and when the size of the curtain 6 is large, at least one group is arranged on each side of the curtain 6 to ensure the requirement of unfolding the curtain 6.

[0039] As shown in the drawings, Figure 4 In this embodiment, the lifting assembly 21 comprises a hollow first connecting rod 211 and a second connecting rod 212. One end of the first connecting rod 211 is hinged to the base 1, and the other end is hinged to one end of the second connecting rod 212. The end of the second connecting rod 212 away from the first connecting rod 211 is hinged to the connecting plate 22. In the process of unfolding the curtain 6, the first connecting rod 211 rotates relative to the base 1, and the end of the first connecting rod 211 away from the base 1 gradually rises relative to the base 1. The second connecting rod 212 rotates relative to the first connecting rod 211, and the end of the second connecting rod 212 away from the first connecting rod 211 gradually rises relative to the first connecting rod 211. In this way, under the mutual cooperation of the first connecting rod 211 and the second connecting rod 212, the curtain 6 can be lifted and unfolded by the connecting plate 22. When the curtain 6 is completely unfolded, the first connecting rod 211 and the second connecting rod 212 form a stable structure at a certain angle. The end of the second connecting rod 212 close to the first connecting rod 211 is provided with a hinge joint 2121, and the first connecting rod 211 is provided with a hinge seat 2112 matched with the hinge joint 2121. The hinge joint 2121 comprises limit protrusions 2122 arranged at intervals, and the hinge seat 2112 is located between the two limit protrusions 2122. The hinge seat 2112 is provided with a limit table 2113 corresponding to the limit protrusions 2122. The hinge seat 2112 and the hinge joint 2121 are hinged by a pin shaft, and the limit table 2113 and the limit protrusions 2122 form a surface contact constraint to realize the constraint of the preset rotation angle between the first connecting rod 211 and the second connecting rod 212. After the curtain 6 is completely unfolded, the limit protrusions 2122 and the limit table 2113 form a surface contact, which can improve the stability between the first connecting rod 211 and the second connecting rod 212.

[0040] As shown in the drawings, Figure 6 and Figure 7As shown, in the embodiment, the first connecting rod 211 is hinged to the base 1 at one end, and is provided with a lock tongue 2111 matched with the lock head 32. The lock head 32 is arranged on the rotating path of the lock tongue 2111. When the first connecting rod 211 is in the curtain opening position, the lock tongue 2111 is located between the lock head 32 and the base 1. When the first connecting rod 211 is in the curtain storage position, the lock head 32 is located between the lock tongue 2111 and the base 1. The lock head 32 comprises a limiting surface 321 and an inclined guide surface 322. The guide surface 322 extends downwardly from the end close to the lock body 31 to the end close to the first connecting rod 211. When the curtain 6 is stored, the lock head 32 is located between the lock tongue 2111 and the base 1. During the unfolding of the curtain 6, the lock tongue 2111 rotates around the pin shaft and abuts against the guide surface 322, forming a pushing force to drive the lock head 32 to retract and move until the curtain 6 is completely unfolded. The lock tongue 2111 rotates to the lower side of the lock head 32. The lock head 32 is reset, the limiting surface 321 is engaged with the lock tongue 2111, and the rotation of the first connecting rod 211 is limited, thereby improving the anti-shock effect of the curtain 6.

[0041] As Figure 4As shown, in the embodiment, the lifting mechanism 2 further comprises an elastic assembly 23, elastic potential energy of the elastic assembly 23 can act on the lifting assembly 21 to tension the curtain 6 during the unfolding process. The elastic assembly 23 comprises a first elastic member 231 arranged in the first connecting rod 211, a second elastic member 232 arranged in the second connecting rod 212, and a cable 233 arranged in the first connecting rod 211 and the second connecting rod 212. The elastic potential energy of the elastic assembly enables the first connecting rod 211 and the second connecting rod 212 to rotate smoothly, so that the curtain 6 can be unfolded and kept in a tensioned state. The elastic member can be arranged in one or two groups. Taking two groups as an example, the first elastic member 231 is fixed in the first connecting rod 211, the second elastic member 232 is fixed in the second connecting rod 212, and the two are connected by the cable 233 and are in a stretched state. When the first connecting rod 211 and the second connecting rod 212 rotate back to the curtain storage position, the first elastic member 231 and the second elastic member 232 are further stretched to store elastic potential energy. During the unfolding process of the curtain 6, the driving reel 5 rotates to release the curtain 6, the first connecting rod 211 and the second connecting rod 212 rotate under the elastic potential energy of the first elastic member 231 and the second elastic member 232 to drive the curtain 6 to rise, and the curtain 6 is always kept in a tensioned state. The types of the first elastic member 231 and the second elastic member 232 are not limited, and can be tension springs, elastic ropes, etc. The number of the elastic members can be a single component or a plurality of combined components. In other possible embodiments, the elastic member can also be arranged in one group, for example, only in the first connecting rod 211 or the second connecting rod 212, one end of the cable 233 is connected with the elastic member, and the other end is fixed in the first connecting rod 211 or the second connecting rod 212. The end of the first connecting rod 211 close to the second connecting rod 212 is provided with a recess 2114, i.e. the hinge seat 2112 is provided with the recess 2114, and the cable 233 is embedded through the recess 2114. By arranging the recess 2114, the cable 233 is limited to avoid deviation and cause the problem of jamming the first connecting rod 211 and the second connecting rod 212.

[0042] As Figure 2 and Figure 8As shown, the limiting guide mechanism 4 is arranged on the rotating path of the lifting mechanism 2, in this embodiment, the limiting guide mechanism 4 is arranged in a group, located between the two groups of lifting assemblies 21, including a hollow guide pipe 41, the guide pipe 41 includes two vertical and parallel guide surfaces 411, the spacing between the two guide surfaces 411 is smaller than the spacing between the two limiting protrusions 2122, and the two guide surfaces 411 are arranged on the moving path of the limiting protrusions 2122. When the lifting mechanism 2 falls back to approach the curtain storage position, the two limiting protrusions 2122 are arranged on the guide pipe 41 to form a guide coupling structure, guiding the lifting mechanism 2 to fall back to the position, and limiting the lifting mechanism 2 falling back to the position, avoiding the problem that the lifting mechanism 2 deviates and shakes due to the vibration of the vehicle in the running state. The guide pipe 41 is provided with a point touch switch 42 in the pipe, and the connecting plate 22 contacts the point touch switch 42 when it falls to the curtain storage position. The point touch switch 42 is used to control the driving reel 5 to act, and when the curtain is stored, the connecting plate 22 gradually falls back, and when the connecting plate 22 touches the elastic sheet of the point touch switch 42 and presses the elastic sheet to make it contact with the switch contact, the point touch switch 42 transmits the signal of the connecting plate 22 falling to the position to the controller to control the driving reel 5 to stop rotating.

[0043] The lifting projection curtain of the embodiment is installed in the vehicle interior, the base is fixed to the top of the vehicle, and the base integrated design is adopted to reduce the occupied space. The cooperation of the driving reel 5 and the lifting mechanism 2 realizes the automatic and stable lifting of the curtain, the lifting mechanism 2 is hinged to the base 1 and can rotate relative to the base 1 between the curtain unfolding position and the curtain storage position to drive the curtain to lift. After the curtain 6 is completely unfolded, the locking mechanism 3 can lock the lifting mechanism 2 to prevent it from rotating, which helps to form a stable frame structure of the projection screen, enhances the anti-vibration performance of the curtain 6, prevents the position of the curtain 6 from changing due to accidental touch or other external force, and ensures the stability and safety in use. Meanwhile, the limiting guide mechanism 4 is arranged on the base 1 to play a precise guiding and limiting role, ensuring that the lifting mechanism 2 moves according to the predetermined track and position, ensuring that the lifting mechanism 2 rotates and falls back to the correct position of the curtain storage position, and avoiding the problem that the lifting mechanism 2 deviates and shakes due to the vibration of the vehicle in the running state.

[0044] In the description of the present application, it should be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second", and the like are used only for descriptive purposes and not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, a limitation with "first", "second", and the like features can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless there is a clear specific limitation.

[0046] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lift projection screen, characterized by, The curtain device comprises a base, a lifting mechanism arranged on the base, a locking mechanism, and a limiting guide mechanism; The base is provided with a driving reel which is rotatable, and a curtain is wound on the driving reel, one end of the curtain is connected to the driving reel, and the other end is connected to the lifting mechanism; The lifting mechanism is hingedly connected to the base, and the lifting mechanism is rotatable relative to the base between a curtain unfolding position and a curtain folding position to drive the curtain to lift or fold; The locking mechanism comprises a lock body arranged on the base, and a lock head arranged on the lock body, the lock head is movable relative to the lock body to limit the rotation of the lifting mechanism; The limiting guide mechanism is arranged on the rotation path of the lifting mechanism.

2. The lift projection screen according to claim 1, wherein, The lifting mechanism comprises at least one set of lifting assemblies, and each lifting assembly comprises a hollow first connecting rod and a second connecting rod, one end of the first connecting rod is hingedly connected to the base, and the other end is hingedly connected to one end of the second connecting rod.

3. The lift projection screen according to claim 2, wherein, The lifting mechanism further comprises a connecting plate, and one end of the second connecting rod away from the first connecting rod is hingedly connected to the connecting plate, and the connecting plate is provided with a clamping groove for clamping and fixing one end of the curtain.

4. The lift projection screen according to claim 2, wherein, One end of the first connecting rod hingedly connected to the base is provided with a lock tongue matched with the lock head, the lock head is arranged on the rotation path of the lock tongue, when the first connecting rod is in the curtain unfolding position, the lock tongue is located between the lock head and the base, and when the first connecting rod is in the curtain folding position, the lock head is located between the lock tongue and the base.

5. The lift projection screen according to claim 4, wherein, The lock head comprises a limiting surface and an inclined guide surface, and the guide surface extends downwardly and inclines from one end close to the lock body to one end close to the first connecting rod.

6. The lift projection screen according to claim 3, wherein, One end of the second connecting rod close to the first connecting rod is provided with a hinged head, the first connecting rod is provided with a hinged seat matched with the hinged head, the hinged head comprises limiting protrusions arranged at intervals, the hinged seat is located between the two limiting protrusions, and the hinged seat is provided with a limiting table corresponding to the limiting protrusions.

7. The lift projection screen according to claim 6, wherein, The limiting guide mechanism comprises a hollow guide pipe, and the guide pipe comprises two vertical and parallel guide surfaces, the distance between the two guide surfaces is smaller than the distance between the two limiting protrusions, and the two guide surfaces are arranged on the movement path of the limiting protrusions.

8. The lift projection screen according to claim 7, wherein, A point touch switch is arranged in the pipe of the guide pipe, and the connecting plate contacts the point touch switch when it is lowered to the curtain folding position.

9. The lift projection screen according to claim 2, wherein, The lifting mechanism further comprises a resilient assembly, the elastic potential energy of the resilient assembly can act on the lifting assembly to tension the curtain during the unfolding process, the resilient assembly comprises a first resilient member arranged in the first connecting rod and / or a second resilient member arranged in the second connecting rod, and a cable arranged in the first connecting rod and the second connecting rod.

10. The lift projection screen according to claim 9, wherein, The end of the first connecting rod close to the second connecting rod is provided with an embedding groove, and the cable is embedded through the embedding groove.

Images