CN218992816U - Screen rotary mechanism - Google Patents

Abstract

The utility model discloses a screen rotating mechanism which comprises an upper fixing plate, a lower fixing plate and a rotating assembly, wherein the rotating assembly comprises a first shaft, a first sprocket wheel coaxially connected with the first shaft, a second sprocket wheel coaxially connected with the second shaft and a first chain for connecting the first sprocket wheel with the second sprocket wheel, the upper fixing plate is fixedly connected with the first shaft, the lower fixing plate is fixedly connected with the second shaft, the upper fixing plate is fixedly connected with a screen, the lower fixing plate is fixedly connected with a corresponding bracket, and the first sprocket wheel can rotate around the second shaft simultaneously along with the rotation of the screen, the first shaft and the first sprocket wheel. According to the utility model, the inclination angle and the height of the screen can be adjusted according to different requirements, the position of the screen relative to the bracket can be adjusted, the space is fully utilized, people can watch and use the screen better, the operation is simple, convenient and flexible, the chain wheel and chain structure is stable, the strength is high, the adjustment is convenient, and the stability and the reliability are high.

Description

Screen rotary mechanism

Technical Field

The present utility model relates to a screen rotating device, and more particularly, to a screen rotating mechanism.

Background

With the rapid development of science and technology and the continuous improvement of living standard of people, screens such as liquid crystal screens, intelligent display screens and the like have become necessary common articles in life and work. Currently, in order to facilitate better viewing and use of the screen, the screen requires a corresponding rotating device by which to rotate the screen, and the screen is adjusted to a proper position as required. However, some existing rotating devices are complex in structure, inconvenient to operate and adjust, difficult to realize free hovering and the like, poor in stability and reliability, incapable of meeting the increasingly high use demands of people, and influencing the application and development of products.

Disclosure of Invention

The utility model aims to provide a screen rotating mechanism which can solve at least one of the technical problems, and the technical scheme of the utility model is as follows:

the utility model provides a screen rotary mechanism, including last fixed plate, lower fixed plate and rotating assembly, rotating assembly includes first axle, with first sprocket of first axle coaxial coupling, the second axle, with second sprocket of second axle coaxial coupling and connect first sprocket and the first chain of second sprocket, go up fixed plate and first axle fixed connection, lower fixed plate and second axle fixed connection, go up the fixed plate be used for with screen fixed connection, lower fixed plate is used for with corresponding support fixed connection, along with the screen, first axle and first sprocket rotate together, second axle and second sprocket are fixed, and under the effect of first chain, first sprocket can use the second axle as the center rotation simultaneously.

In some embodiments, a slack adjuster assembly is provided on the first chain.

In some embodiments, the rotating assembly is disposed in a first housing, and the first housing is provided with a second avoidance hole matched with the upper fixing plate and a third avoidance hole matched with the lower fixing plate, and can synchronously rotate around the second shaft as a center along with the rotation of the first sprocket around the second shaft as a center.

In some embodiments, the lower fixing plate is provided with a first shielding cover, a first arc-shaped groove matched with the second shaft and a first connecting part fixedly connected with the screen, and the first shielding cover is provided with a first avoiding hole matched with the first connecting part.

In some embodiments, the first shaft is hinged to one end of the first strut, and the second shaft is hinged to the other end of the first strut, and the first strut is capable of rotating synchronously about the second shaft as the first sprocket rotates about the second shaft.

In some embodiments, be provided with on the second shaft with first branch matched with first dish spring and with first dish spring matched with first retaining member, first retaining member carries out spacing locking to first dish spring, and first dish spring can provide friction damping force for the rotation of first branch.

In some embodiments, the first sprocket, the second sprocket and the first chain are located between two first struts symmetrically disposed, and the second shaft is provided with a first flange thereon, and the first locking member and the first flange are capable of axially securing the second sprocket, the first disc spring and the two first struts.

In some embodiments, the screen assembly further comprises a gravity balancing mechanism cooperating with the rotating assembly, the gravity balancing mechanism being capable of elastically supporting the rotating assembly to balance gravity torque of the screen as the screen, the first shaft and the first sprocket rotate together.

In some embodiments, the gravity balance mechanism includes a first slide bar and a first elastic element matched with the first slide bar, one end of the first slide bar is provided with a first connecting column, the rotating assembly is provided with a first connecting hole hinged with the first connecting column, the first connecting hole is eccentrically arranged along a second shaft, the first connecting column can rotate with the second shaft as a center along with rotation of the screen, the first shaft and the first sprocket, the first connecting column can drive the first slide bar to slide in a rotating manner, and the first slide bar can compress or stretch the first elastic element to elastically support the rotating assembly.

In some embodiments, the first slide bar and the first elastic element are disposed in the second housing, the second housing is provided with a first arc hole which is matched with the eccentric rotation of the first connecting column, the first elastic element is a spring sleeved on the first slide bar, the first slide bar is provided with a first connecting head hinged with the first connecting column, the second housing is provided with a first supporting plate which is in sliding connection with the first slide bar, one end of the first elastic element is pressed against the first supporting plate, and the other end of the first elastic element is pressed against the first connecting head.

The beneficial effects of the utility model are as follows: the upper fixing plate is fixedly connected with a corresponding screen, such as a liquid crystal screen and an intelligent display screen, the lower fixing plate is fixedly connected with a corresponding support, when the position of the screen is required to be adjusted, the screen is rotated, the first shaft and the first sprocket rotate along with the screen, and under the action of the first chain, the first sprocket simultaneously rotates by taking the second shaft as the center, namely, the screen can rotate by taking the second shaft as the center when the screen rotates, so that the inclination angle and the height of the screen can be adjusted according to different requirements, the position of the screen relative to the support can be adjusted, such as the support is mounted by the wall, the rotation of the screen can not touch the wall, the space is fully utilized, people can watch and use the screen better, the operation is simple, convenient and flexible, the chain structure of the sprocket is stable, the strength is high, the adjustment is convenient, the stability and the reliability are high, the different use requirements of people are met, and the application and development of products are expanded.

In addition, in the technical scheme of the utility model, the technical scheme can be realized by adopting conventional means in the field without specific description.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a screen rotation mechanism according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a screen rotation mechanism according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram illustrating a rotation process of a screen rotation mechanism according to an embodiment of the utility model.

Fig. 4 is a schematic partial structure of a screen rotation mechanism according to an embodiment of the present utility model.

Fig. 5 is a schematic partial structure of a screen rotation mechanism according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a lower fixing plate and a first shielding cover according to an embodiment of the present utility model.

Fig. 7 is an exploded view of a rotating assembly according to one embodiment of the present utility model.

Fig. 8 is a schematic structural view of a first chain according to an embodiment of the present utility model.

Fig. 9 is an exploded view of a gravity balance mechanism according to an embodiment of the present utility model.

In the drawings, the reference numerals indicate that the upper fixing plate 1, the lower fixing plate 2, the first shielding cover 21, the first avoidance hole 211, the first connection portion 22, the first arc groove 23, the rotating assembly 3, the first connection hole 301, the first shaft 31, the first sprocket 32, the second shaft 33, the first disc spring 331, the first locking member 332, the first flange 333, the second sprocket 34, the first chain 35, the slack adjustment assembly 351, the first connection rod 3511, the second connection rod 3512, the first screw 3513, the first strut 36, the gravity balance mechanism 4, the first slide rod 41, the first elastic member 42, the first connection post 43, the first connection head 44, the first support plate 45, the second housing 46, the first arc hole 461, the first housing 5, the second avoidance hole 51, and the third avoidance hole 52.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are illustrative of some, but not all embodiments of the utility model and are not intended to limit the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "both ends", "two sides", "bottom", "top", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "superior," "subordinate," "primary," "secondary," and the like are used for descriptive purposes only and may be used simply to more clearly distinguish between different components and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or communicating between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 9, there is schematically shown a screen rotating mechanism according to the present utility model, including an upper fixing plate 1, a lower fixing plate 2 and a rotating member 3, wherein the upper fixing plate 1 is fixedly connected with a screen, such as a liquid crystal screen, an intelligent display screen, etc., the lower fixing plate 2 is fixedly connected with a corresponding bracket, the bracket can be fixed on the ground or on a wall, etc., the upper fixing plate 1 and the screen and the lower fixing plate 2 and the bracket can be fixedly connected by fasteners such as screws, etc., or other means in the prior art, the rotating member 3 can rotate the upper fixing plate 1 and the screen, thereby adjusting the position of the screen, etc.

The rotating assembly 3 comprises a first shaft 31, a first sprocket 32, a second shaft 33, a second sprocket 34 and a first chain 35, wherein the first sprocket 32 is coaxially connected with the first shaft 31, the second sprocket 34 is coaxially connected with the second shaft 33, the first sprocket 32 is generally fixed in the circumferential direction and axially fixed with the first shaft 31, the second sprocket 34 is fixed in the circumferential direction and axially fixed with the second shaft 33, the first chain 35 is connected with the first sprocket 32 and the second sprocket 34, the upper fixing plate 1 is fixedly connected with the first shaft 31, namely, the upper fixing plate 1, the first shaft 31 and the screen rotate together, the lower fixing plate 2 is fixedly connected with the second shaft 33, and the chain structure of the sprocket is stable, high in strength and convenient to adjust. The upper fixing plate 1 and the first shaft 31 and the lower fixing plate 2 and the second shaft 33 may be fixedly coupled by fasteners such as screws or other means in the prior art.

In the use, go up fixed plate 1 and corresponding screen fixed connection, such as LCD screen, intelligent display screen etc. lower fixed plate 2 and corresponding support fixed connection, the support can be fixed on the ground or fix when the position of screen etc. is adjusted to the needs, rotate the screen, first axle 31 and first sprocket 32 rotate along with the screen, because second shaft 33 and second sprocket 34 are fixed, and under the effect of first chain 35, make first sprocket 32 take second shaft 33 as the center rotatory simultaneously, the screen can also take second shaft 33 as the center rotatory promptly, as shown in fig. 3 for the schematic diagram of rotation process, the screen can be at 0 ~ 45 free rotations, thereby can adjust the inclination and the height of screen according to different demands, can also adjust the position of screen relative to the support, like when the support is by the wall installation, make screen and support and wall can keep suitable distance, the screen can not meet wall etc. with second shaft 33, more make full use of space, be convenient for watch better, use the screen, the operation is simple, flexible structure is stable and high reliability, and high stability can not satisfy people's demand.

As shown in fig. 8, the first chain 35 is provided with a tightness adjusting assembly 351, and the tightness adjusting assembly 351 can be one or more than two, so that the tightness adjusting assembly 351 is convenient for tightness adjusting the first chain 35, and the operation is more convenient, safer and more reliable. The tightness adjusting assembly 351 comprises a first connecting rod 3511 and a second connecting rod 3512, one end of the first connecting rod 3511 is connected with the first chain 35, the other end of the first connecting rod 3511 is provided with a first screw rod 3513, one end of the second connecting rod 3512 is connected with the first chain 35, the other end of the second connecting rod 3512 is provided with a threaded hole matched with the first screw rod 3513, the first screw rod 3513 and the first connecting rod 3511 are axially fixed and can rotate in the circumferential direction, the first screw rod 3513 is rotated, and the tightness of the first chain 35 is adjusted by adjusting the screwed length of the first screw rod 3513.

The first sprocket 32 and the second sprocket 34 can be double-row chain sprockets, and the first chain 35 can be double-row chain, so that the structure is more stable and reliable. Further, the first chain 35 may be slack-adjusted using, for example, a tensioner or other suitable tensioning mechanism known in the art.

The lower fixing plate 2 is substantially identical in structure to the upper fixing plate 1, and the first shaft 31 is substantially identical in structure to the second shaft 33, and the lower fixing plate 2 and the second shaft 33 are exemplified herein. The lower fixing plate 2 is provided with a first shielding cover 21 and a first connecting part 22 fixedly connected with a screen, the first shielding cover 21 is provided with a first avoiding hole 211 matched with the first connecting part 22, the first connecting part 22 extends out of the first avoiding hole 211 to be connected with the screen, the first shielding cover 21 can prevent sundries from entering the screen, and the structure is more compact, stable, safer, more reliable and the like.

The first arc-shaped groove 23 matched with the second shaft 33 is arranged on the lower fixing plate 2, so that the lower fixing plate 2 is more convenient to connect with the second shaft 33, and the operation is more convenient, stable and reliable. The shapes of the lower fixing plate 2 and the first shielding cover 21 are determined according to specific situations, as shown in fig. 6, the lower fixing plate 2 can be semi-cylindrical with a first arc-shaped groove 23, the first shielding cover 21 can be a sleeve with an opening, two sides of the first shielding cover 21 can be respectively provided with an ear plate, and the ear plates are more convenient to be connected with the lower fixing plate 2 by fasteners such as screws. Similarly, the lower fixing plate 2 and the second shaft 33 can be disposed as described above.

The rotating assembly 3 is arranged in the first shell 5, the second avoiding hole 51 matched with the upper fixing plate 1 and the third avoiding hole 52 matched with the lower fixing plate 2 are arranged on the first shell 5, and along with the rotation of the first sprocket 32 by taking the second shaft 33 as the center, the first shell 5 can synchronously rotate by taking the second shaft 33 as the center, and the rotating assembly 3 is hidden in the first shell 5, so that the rotating assembly is safer, more stable and more reliable.

The both sides in the first shell 5 are provided with rotating assembly 3 respectively, go up fixed plate 1 respectively with two first axle 31 fixed connection, lower fixed plate 2 respectively with two second axle 33 fixed connection, the second dodges the hole 51 and is located the top centre of first shell 5, the third dodges the hole 52 and is located the bottom centre of first shell 5, the atress is more even, guarantees the better rotation of screen, more firm, reliable. The first casing 5 generally comprises a casing, cover plates are respectively arranged on two sides of the casing, and the cover plates and the casing can be connected by fasteners such as buckles, screws or the like or welded, so that the operation such as installation and maintenance is more convenient.

The first shaft 31 is hinged with one end of the first supporting rod 36, the second shaft 33 is hinged with the other end of the first supporting rod 36, shaft shoulders, locking nuts, elastic check rings and the like can be respectively arranged on the first shaft 31 and the second shaft 33, the first supporting rod 36 is convenient to axially fix, and along with the rotation of the first sprocket 32 by taking the second shaft 33 as a center, the first supporting rod 36 can synchronously rotate by taking the second shaft 33 as a center, namely, the first supporting rod 36 and the first shell 5 rotate together by taking the second shaft 33 as a center, so that the structure is more stable and reliable.

Be provided with on the second shaft 33 with first branch 36 matched with first dish spring 331 and with first retaining member 332 of first dish spring 331 matched with, the quantity of first dish spring 331 can be one or a plurality of that stack in proper order, first retaining member 332 carries out spacing locking to first dish spring 331, and first dish spring 331 can have certain pressure to first branch 36 for first dish spring 331 can provide friction damping force for the rotation of first branch 36, thereby makes the screen can freely hover, and the operation is simpler, convenient, nimble. The first locking member 332 may be a locking nut, which is more convenient to operate, etc.

The first sprocket 32, the second sprocket 34 and the first chain 35 are located between the two first supporting rods 36 which are symmetrically arranged, the first flange 333 is arranged on the second shaft 33, the first locking piece 332 and the first flange 333 can axially fix the second sprocket 34, the first disc spring 331 and the two first supporting rods 36, the operation is simpler and more convenient, and the structure is more stable and reliable. Similarly, the first strut 36, the first shaft 31 and the first sprocket 32 may be provided as described above.

Because with screen, first axle 31 and first sprocket 32 are together rotated, first sprocket 32 is the rotation as the center with second axle 33 simultaneously, and the screen can also be rotated as the center when the rotation of screen, so can produce the gravity moment of torsion in the screen motion process, this screen rotary mechanism still includes with rotating assembly 3 matched with gravity balance mechanism 4, gravity balance mechanism 4 can be to rotating assembly 3 elastic support to the gravity moment of torsion of balanced screen, reduce the damage of spare part, improve the life of equipment etc. safer, reliable. In general, the rotating assemblies 3 are in one-to-one correspondence with the gravity balancing mechanisms 4, for example, the rotating assemblies 3 are respectively arranged at two sides in the first housing 5, and each rotating assembly 3 is respectively matched with the gravity balancing mechanism 4, so that the stress is more uniform, and the device is more stable and reliable.

The gravity balance mechanism 4 comprises a first slide bar 41 and a first elastic piece 42 matched with the first slide bar 41, one end of the first slide bar 41 is provided with a first connecting column 43, the rotating assembly 3 is provided with a first connecting hole 301 hinged with the first connecting column 43, the first connecting hole 301 is eccentrically arranged along the second shaft 33, the first connecting hole 301 can be arranged on the first support rod 36, and the first slide bar 41 and the first elastic piece 42 can be in one group or more than two groups arranged side by side. As the screen, the first shaft 31 and the first sprocket 32 rotate together, the first connecting post 43 can rotate about the second shaft 33 to drive the first slide bar 41 to slide, and the first slide bar 41 can compress or stretch the first elastic member 42, so that the first elastic member 42 has a reverse force on the movement of the first connecting post 43, that is, can elastically support the rotating assembly 3, and balance the gravity torque of the screen.

The first slide bar 41 and the first elastic piece 42 are arranged in the second casing 46, the first arc-shaped hole 461 which is matched with the eccentric rotation of the first connecting column 43 is arranged on the second casing 46, the first arc-shaped hole 461 is coaxial with the second shaft 33, the first connecting column 43 can rotate around the second shaft 33 along the first arc-shaped hole 461, and the structure is more compact, stable, safer and more reliable.

The first elastic member 42 is a spring sleeved on the first sliding rod 41, a first connecting head 44 hinged with the first connecting column 43 is arranged on the first sliding rod 41, the first connecting head 44 can be in threaded connection with one end of the first sliding rod 41, a first supporting plate 45 slidably connected with the first sliding rod 41 is arranged in the second housing 46, a guiding through hole matched with the first sliding rod 41 is formed in the first supporting plate 45, one end of the first elastic member 42 is pressed against the first supporting plate 45, the other end of the first elastic member 42 is pressed against the first connecting head 44, and when the first connecting column 43 rotates around the second shaft 33 along the first arc-shaped hole 461, the first sliding rod 41 is driven to slide along the guiding through hole in the first supporting plate 45, and meanwhile, the first elastic member 42 is compressed, so that the first elastic member 42 has a reverse acting force on the movement of the first connecting column 43, namely, the first elastic member can elastically support the rotating assembly 3, and balance the gravity torque of a screen. Furthermore, the second housing 46 can also be fixedly connected to the corresponding bracket together with the lower fixing plate 2.

The second housing 46 generally comprises a housing and a bottom plate arranged at the bottom of the housing, the first arc-shaped hole 461 is arranged on the upper housing, the first sliding rod 41 and the first elastic piece 42 are positioned in a cavity formed by the bottom plate and the housing, the bottom plate and the housing can be connected by fastening pieces such as a buckle connection and a screw or welded connection, and the like, so that the mounting, the maintenance and the like are more convenient. The two sides of the first supporting plate 45 are respectively provided with a first bump, the second casing 46 is provided with a chute matched with the first bump, the chute can be arranged along the vertical direction, when the first connecting column 43 rotates around the second shaft 33 along the first arc-shaped hole 461, the first sliding rod 41 is driven to slide along the guide through hole on the first supporting plate 45, the first supporting plate 45 can properly move through the chute through the first bump, the locking is prevented, and the like, and the device is safer and more reliable.

Compared with the prior art, the utility model has the advantages that: go up fixed plate 1 and corresponding screen fixed connection, such as LCD screen, intelligent display screen etc., lower fixed plate 2 and corresponding support fixed connection, the support can be fixed on the ground or fixed when the position of screen is adjusted to the needs, rotate the screen, first axle 31 and first sprocket 32 rotate along with the screen, because second shaft 33 and second sprocket 34 are fixed, and under the effect of first chain 35, make first sprocket 32 use second shaft 33 to rotate as the center simultaneously, the screen can also use second shaft 33 to rotate as the center promptly when the rotation, thereby can adjust inclination and the height of screen according to different demands, can also adjust the screen for the position of support, such as when the support leans on the wall to install, the screen uses second shaft 33 to rotate as the center, make screen and support and wall can keep suitable distance, the screen can not touch wall etc., make full use of space more, the people of being convenient for watch, use the screen better, first dish spring 331 can provide the damping force for rotating assembly 3, make screen can freely hover the mechanism 4 to support the elasticity, the elasticity and stability can also be improved, the stability and stability can be improved, the stability and the chain can be improved, the safety and the stability can be improved, the chain is more compact, the safety and the stability can be used to the chain is more stable, the stability and the stability can be used, and the stability can be used to the chain 35, and the stability can be more stable, and the stability can be used and the stability.

The foregoing description of the embodiments of the present utility model is merely illustrative of the technical solutions of the present utility model and not limiting thereof, and it should be understood that modifications and substitutions can be made by those skilled in the art without departing from the inventive concept of the present utility model, and all such modifications and substitutions shall fall within the scope of the appended claims. In this case, all details may be replaced with equivalent elements, and the materials, shapes and sizes may be arbitrary.

Claims (10)

1. The utility model provides a screen rotary mechanism, its characterized in that includes fixed plate (1), lower fixed plate (2) and rotating assembly (3), rotating assembly (3) include first axle (31), with first sprocket (32) of first axle (31) coaxial coupling, second axle (33), with second sprocket (34) of second axle (33) coaxial coupling and connection first sprocket (32) with first chain (35) of second sprocket (34), upper fixed plate (1) with first axle (31) fixed connection, lower fixed plate (2) with second axle (33) fixed connection, upper fixed plate (1) be used for with screen fixed connection, lower fixed plate (2) be used for with corresponding support fixed connection, along with the screen first axle (31) with first sprocket (32) rotate together, second axle (33) with second sprocket (34) are fixed, and under the effect of first chain (35), first sprocket (33) can rotate for center simultaneously.

2. A screen rotation mechanism according to claim 1, wherein the first chain (35) is provided with a slack adjuster assembly (351).

3. A screen rotation mechanism according to claim 1, wherein the rotation assembly (3) is disposed in a first housing (5), the first housing (5) is provided with a second avoidance hole (51) matched with the upper fixing plate (1) and a third avoidance hole (52) matched with the lower fixing plate (2), and the first housing (5) can synchronously rotate around the second shaft (33) as the first sprocket (32) rotates around the second shaft (33).

4. A screen rotation mechanism according to claim 1, wherein the lower fixing plate (2) is provided with a first shielding cover (21), a first arc-shaped groove (23) matched with the second shaft (33) and a first connecting part (22) fixedly connected with the screen, and the first shielding cover (21) is provided with a first avoiding hole (211) matched with the first connecting part (22).

5. A screen rotation mechanism according to claim 1, wherein the first shaft (31) is hinged to one end of a first strut (36), the second shaft (33) is hinged to the other end of the first strut (36), and the first strut (36) is capable of rotating synchronously about the second shaft (33) as the first sprocket (32) rotates about the second shaft (33).

6. A screen rotation mechanism according to claim 5, wherein the second shaft (33) is provided with a first disc spring (331) cooperating with the first strut (36) and a first locking member (332) cooperating with the first disc spring (331), the first locking member (332) performs limit locking on the first disc spring (331), and the first disc spring (331) can provide a friction damping force for rotation of the first strut (36).

7. A screen rotation mechanism according to claim 6, wherein the first sprocket (32), the second sprocket (34) and the first chain (35) are located between two first struts (36) symmetrically arranged, the second shaft (33) is provided with a first flange (333), and the first locking member (332) and the first flange (333) are capable of axially fixing the second sprocket (34), the first disc spring (331) and the two first struts (36).

8. A screen rotation mechanism according to any one of claims 1 to 7, further comprising a gravity balance mechanism (4) cooperating with the rotating assembly (3), the gravity balance mechanism (4) being capable of resiliently supporting the rotating assembly (3) to balance the gravitational torque of the screen as the screen, the first shaft (31) and the first sprocket (32) rotate together.

9. A screen rotation mechanism according to claim 8, wherein the gravity balance mechanism (4) comprises a first slide bar (41) and a first elastic member (42) matched with the first slide bar (41), one end of the first slide bar (41) is provided with a first connecting column (43), the rotation component (3) is provided with a first connecting hole (301) hinged with the first connecting column (43), the first connecting hole (301) is eccentrically arranged along the second shaft (33), the first connecting column (43) can rotate around the second shaft (33) along with the rotation of the screen, the first shaft (31) and the first sprocket (32), the first connecting column (43) can drive the first slide bar (41) to slide, and the first slide bar (41) can compress or stretch the first elastic member (42) to elastically support the rotation component (3).

10. A screen rotation mechanism according to claim 9, wherein the first slide bar (41) and the first elastic member (42) are arranged in the second housing (46), a first arc-shaped hole (461) which is eccentrically and rotatably matched with the first connecting column (43) is arranged on the second housing (46), the first elastic member (42) is a spring sleeved on the first slide bar (41), a first connecting joint (44) hinged with the first connecting column (43) is arranged on the first slide bar (41), a first supporting plate (45) which is slidably connected with the first slide bar (41) is arranged in the second housing (46), one end of the first elastic member (42) is pressed against the first supporting plate (45), and the other end of the first elastic member (42) is pressed against the first connecting joint (44).

Images