A screen rotation mechanism

Abstract

The present disclosure provides a screen rotation mechanism, comprising an upper fixed plate, a lower fixed plate, and a rotating assembly, wherein the rotating assembly comprises a first shaft, a first sprocket coaxially connected to the first shaft, a second shaft, a second sprocket coaxially connected to the second shaft, and a first chain connecting the first sprocket and the second sprocket, wherein the upper fixed plate is fixedly connected to the first shaft, and the lower fixed plate is fixedly connected to the second shaft, the upper fixed plate is used to be fixedly connected to the screen, and the lower fixed plate is used to be fixedly connected to the corresponding bracket, and as the screen, the first shaft, and the first sprocket rotate together, the first sprocket can simultaneously rotate around the second shaft. The present disclosure can adjust the tilt angle and height of the screen according to different needs, and can also adjust the position of the screen relative to the bracket, making full use of space, facilitating people to better view and use the screen, and is simple, convenient, and flexible to operate. The sprocket chain structure is stable, has high strength, is easy to adjust, and has high stability and reliability.

Description

Technical Field

[0001] The present disclosure relates to a screen rotation device, and in particular to a screen rotation mechanism. Background Art

[0002] With the rapid development of science and technology and the continuous improvement of people's living standards, screens such as LCD screens and smart displays have become essential and common items in daily life and work. Currently, to facilitate people's viewing and use of screens, screens require corresponding rotation devices. These devices rotate the screen and adjust it to the appropriate position as needed. However, some existing rotation devices have complex structures, are difficult to operate and adjust, and do not easily achieve free hovering. They also have poor stability and reliability, and cannot meet people's increasingly demanding usage needs, which has hindered the application and development of products. Summary of the Invention

[0003] The purpose of this disclosure is to provide a screen rotation mechanism that can solve at least one of the above technical problems. The technical solution of this disclosure is as follows:

[0004] A screen rotation mechanism includes an upper fixed plate, a lower fixed plate and a rotating assembly, the rotating assembly includes a first shaft, a first sprocket coaxially connected to the first shaft, a second shaft, a second sprocket coaxially connected to the second shaft and a first chain connecting the first sprocket and the second sprocket, the upper fixed plate is fixedly connected to the first shaft, the lower fixed plate is fixedly connected to the second shaft, the upper fixed plate is used to be fixedly connected to the screen, and the lower fixed plate is used to be fixedly connected to the corresponding bracket, as the screen, the first shaft and the first sprocket rotate together, the second shaft and the second sprocket are fixed, and under the action of the first chain, the first sprocket can simultaneously rotate around the second shaft.

[0005] In some embodiments, a tension adjustment assembly is provided on the first chain.

[0006] In some embodiments, the rotating assembly is disposed in the first shell, and the first shell is provided with a second avoidance hole that cooperates with the upper fixed plate and a third avoidance hole that cooperates with the lower fixed plate. As the first sprocket rotates around the second axis, the first shell can rotate synchronously around the second axis.

[0007] In some embodiments, the lower fixed plate is provided with a first shielding cover, a first arc groove cooperating with the second axis and a first connecting portion for fixedly connecting with the screen, and the first shielding cover is provided with a first avoidance hole cooperating with the first connecting portion.

[0008] In some embodiments, the first shaft is hinged to one end of the first support rod, and the second shaft is hinged to the other end of the first support rod. As the first sprocket rotates around the second shaft, the first support rod can rotate synchronously around the second shaft.

[0009] In some embodiments, a first disc spring cooperating with the first support rod and a first locking member cooperating with the first disc spring are provided on the second shaft. The first locking member limits and locks the first disc spring, and the first disc spring can provide friction damping force for the rotation of the first support rod.

[0010] In some embodiments, the first sprocket, the second sprocket and the first chain are located between two symmetrically arranged first support rods, a first flange is provided on the second shaft, and the first locking member and the first flange can axially fix the second sprocket, the first disc spring and the two first support rods.

[0011] In some embodiments, a gravity balancing mechanism is further included that cooperates with the rotating assembly. As the screen, the first shaft, and the first sprocket rotate together, the gravity balancing mechanism can elastically support the rotating assembly to balance the gravity torque of the screen.

[0012] In some embodiments, the gravity balancing mechanism includes a first sliding rod and a first elastic member cooperating with the first sliding rod. A first connecting column is provided at one end of the first sliding rod, and a first connecting hole hinged to the first connecting column is provided on the rotating assembly. The first connecting hole is eccentrically arranged along the second axis. As the screen, the first axis and the first sprocket rotate together, the first connecting column can rotate around the second axis. The rotation of the first connecting column can drive the first sliding rod to slide. The sliding of the first sliding rod can compress or stretch the first elastic member to elastically support the rotating assembly.

[0013] In some embodiments, the first sliding rod and the first elastic member are arranged in the second shell, the second shell is provided with a first arc-shaped hole that cooperates with the eccentric rotation of the first connecting column, the first elastic member is a spring sleeved on the first sliding rod, the first sliding rod is provided with a first connecting head hinged to the first connecting column, and a first support plate slidably connected to the first sliding rod is provided in the second shell, one end of the first elastic member is pressed against the first support plate, and the other end of the first elastic member is pressed against the first connecting head.

[0014] The beneficial effects of the present invention are as follows: the upper fixed plate is fixedly connected to the corresponding screen, such as an LCD screen, a smart display screen, etc., and the lower fixed plate is fixedly connected to the corresponding bracket. When the position of the screen needs to be adjusted, the screen is rotated, and the first axis and the first sprocket rotate along with the screen. Since the second axis and the second sprocket are fixed, and under the action of the first chain, the first sprocket rotates with the second axis as the center at the same time, that is, while the screen rotates, the screen can also rotate with the second axis as the center, so that the inclination angle and height of the screen can be adjusted according to different needs, and the position of the screen relative to the bracket can also be adjusted. For example, when the bracket is installed against the wall, the rotation of the screen will not hit the wall, etc., making full use of the space, making it easier for people to watch and use the screen, and the operation is simple, convenient and flexible. The sprocket chain structure is stable, has high strength, is easy to adjust, and has high stability and reliability. It can meet people's increasingly high different usage needs and expand the application and development of the product.

[0015] In addition, in the technical solutions disclosed herein, anything not specifically stated can be implemented by conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 An exploded view of a screen rotation mechanism according to an embodiment of the present disclosure.

[0018] Figure 2 The present invention is a structural schematic diagram of a screen rotation mechanism according to an embodiment of the present invention.

[0019] Figure 3 The present invention is a schematic diagram of a screen rotation mechanism according to an embodiment of the present invention.

[0020] Figure 4 The figure is a partial structural diagram of a screen rotation mechanism according to an embodiment of the present disclosure.

[0021] Figure 5 The figure is a partial structural diagram of a screen rotation mechanism according to an embodiment of the present disclosure.

[0022] Figure 6 Schematic diagram of the structure of the lower fixing plate and the first shielding cover according to an embodiment of the present invention.

[0023] Figure 7An exploded view of a rotating assembly according to an embodiment of the present disclosure.

[0024] Figure 8 This is a schematic structural diagram of the first chain according to an embodiment of the present disclosure.

[0025] Figure 9 An exploded view of a gravity balancing mechanism according to an embodiment of the present disclosure.

[0026] The numbers in the accompanying drawings explain the upper fixed plate 1, the lower fixed plate 2, the first shielding cover 21, the first avoidance hole 211, the first connecting part 22, the first arc-shaped groove 23, the rotating component 3, the first connecting 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 tension adjustment component 351, the first connecting rod 3511, the second connecting rod 3512, the first screw 3513, the first support rod 36, the gravity balancing mechanism 4, the first sliding rod 41, the first elastic member 42, the first connecting column 43, the first connecting head 44, the first support plate 45, the second shell 46, the first arc-shaped hole 461, the first shell 5, the second avoidance hole 51, and the third avoidance hole 52. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are part of the embodiments of the present disclosure, rather than all of the embodiments, and are only used to explain the present disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0028] In the description of the present disclosure, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "two ends", "both sides", "bottom", "top", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but cannot be understood as indicating or implying relative importance.

[0029] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0030] See also Figures 1 to 9 As shown, a screen rotation mechanism according to the present invention is schematically shown, including an upper fixed plate 1, a lower fixed plate 2 and a rotating component 3. The upper fixed plate 1 is used to be fixedly connected to a screen, such as an LCD screen, a smart display screen, etc. The lower fixed plate 2 is used to be fixedly connected to a corresponding bracket, and the bracket can be fixed to the ground or to a wall, etc. The upper fixed plate 1 and the screen and the lower fixed plate 2 and the bracket can be connected with fasteners such as screws or other methods in the prior art. The rotating component 3 can rotate the upper fixed plate 1 and the screen, thereby adjusting the position of the screen, etc.

[0031] The rotating assembly 3 includes a first shaft 31, a first sprocket 32, a second shaft 33, a second sprocket 34, and a first chain 35. The first sprocket 32 is coaxially connected to the first shaft 31, and the second sprocket 34 is coaxially connected to the second shaft 33. Typically, the first sprocket 32 is fixed to the first shaft 31 in the circumferential direction and fixed in the axial direction, and the second sprocket 34 is fixed to the second shaft 33 in the circumferential direction and fixed in the axial direction. The first chain 35 connects the first sprocket 32 and the second sprocket 34. The upper fixed plate 1 is fixedly connected to the first shaft 31, that is, the upper fixed plate 1, the first shaft 31, and the screen rotate together. The lower fixed plate 2 is fixedly connected to the second shaft 33. The sprocket chain structure is stable, strong, and easy to adjust. The upper fixed plate 1 and the first shaft 31, as well as the lower fixed plate 2 and the second shaft 33, can be connected using fasteners such as screws or other methods known in the art.

[0032] During use, the upper fixing plate 1 is fixedly connected to the corresponding screen, such as an LCD screen, a smart display screen, etc., and the lower fixing plate 2 is fixedly connected to the corresponding bracket, which can be fixed to the ground or fixed to the wall, etc. When the position of the screen needs to be adjusted, the screen is rotated, and the first shaft 31 and the first sprocket 32 rotate together with the screen. Since the second shaft 33 and the second sprocket 34 are fixed, and under the action of the first chain 35, the first sprocket 32 rotates with the second shaft 33 as the center at the same time, that is, the screen can rotate with the second shaft 33 as the center while rotating. Figure 3The figure shows a schematic diagram of the rotation process. The screen can rotate freely between 0 and 45 degrees, so that the tilt angle and height of the screen can be adjusted according to different needs. The position of the screen relative to the bracket can also be adjusted. For example, when the bracket is installed against the wall, the screen rotates around the second axis 33, so that the screen can maintain a suitable distance from the bracket and the wall, and the screen will not touch the wall, etc., making more effective use of space, making it easier for people to watch and use the screen. The operation is simple, convenient and flexible, the structure is stable, the strength is high, the adjustment is convenient, the stability and reliability are high, and it can meet people's increasingly high different usage needs.

[0033] like Figure 8 As shown, the first chain 35 is provided with a tension adjustment assembly 351. There can be one or more tension adjustment assemblies 351. The tension adjustment assembly 351 facilitates tension adjustment of the first chain 35, making operation more convenient, safer, and more reliable. The tension adjustment assembly 351 includes a first connecting rod 3511 and a second connecting rod 3512. One end of the first connecting rod 3511 is connected to the first chain 35. The other end of the first connecting rod 3511 is provided with a first screw 3513. One end of the second connecting rod 3512 is connected to the first chain 35. The other end of the second connecting rod 3512 is provided with a threaded hole that cooperates with the first screw 3513. The first screw 3513 is axially fixed to the first connecting rod 3511 and can rotate circumferentially. The tension of the first chain 35 is adjusted by rotating the first screw 3513 and adjusting the length of the first screw 3513 screwed into the threaded hole. Operation is simple and convenient.

[0034] The first sprocket 32 and the second sprocket 34 can adopt double-row chain sprockets, and the first chain 35 can adopt double-row chains, and the structure is more stable and reliable. In addition, the first chain 35 can also be adjusted in tension by adopting a tensioning wheel or other suitable tensioning mechanisms in the prior art.

[0035] The lower fixing plate 2 has a substantially identical structure to the upper fixing plate 1, and the first shaft 31 and second shaft 33 have substantially the same structure. Here, the lower fixing plate 2 and second shaft 33 are used as an example. The lower fixing plate 2 is provided with a first shielding cover 21 and a first connecting portion 22 for secure connection to the screen. The first shielding cover 21 is provided with a first avoidance hole 211 that mates with the first connecting portion 22. The first connecting portion 22 extends through the first avoidance hole 211 to connect to the screen. The first shielding cover 21 prevents the ingress of debris, resulting in a more compact, stable, safer, and more reliable structure.

[0036] The lower fixing plate 2 is provided with a first arc groove 23 that matches the second shaft 33, which makes it easier for the lower fixing plate 2 to be connected to the second shaft 33, making the operation more convenient, more stable and reliable. The shapes of the lower fixing plate 2 and the first shielding cover 21 are determined according to the specific situation, such as Figure 6As shown, the lower fixing plate 2 can be semi-cylindrical with a first arcuate groove 23, and the first shielding cover 21 can be a sleeve with an opening. Lugs can also be provided on both sides of the first shielding cover 21 to facilitate connection to the lower fixing plate 2 using fasteners such as screws. Similarly, the lower fixing plate 2 and the second shaft 33 can be configured similarly to the above.

[0037] The rotating assembly 3 is arranged in the first shell 5. The first shell 5 is provided with a second avoidance hole 51 that cooperates with the upper fixed plate 1 and a third avoidance hole 52 that cooperates with the lower fixed plate 2. As the first sprocket 32 rotates around the second shaft 33, the first shell 5 can rotate synchronously around the second shaft 33. The rotating assembly 3 is hidden in the first shell 5, which is safer, more stable and reliable.

[0038] Rotational assemblies 3 are provided on either side of the first housing 5. The upper fixing plate 1 is fixedly connected to the two first shafts 31, and the lower fixing plate 2 is fixedly connected to the two second shafts 33. A second relief hole 51 is located in the center of the top of the first housing 5, and a third relief hole 52 is located in the center of the bottom of the first housing 5. This ensures more even force distribution, better rotation of the screen, and greater stability and reliability. The first housing 5 typically includes a shell, with cover plates provided on either side. The cover plates and the shell can be connected using snap fasteners, screws or other fasteners, or welding, making installation and maintenance more convenient.

[0039] The first shaft 31 is hinged to one end of the first support rod 36, and the second shaft 33 is hinged to the other end of the first support rod 36. The first shaft 31 and the second shaft 33 can be respectively provided with shaft shoulders, locking nuts, elastic retaining rings, etc., to facilitate axial fixation of the first support rod 36. As the first sprocket 32 rotates around the second shaft 33, the first support rod 36 can synchronously rotate around the second shaft 33. That is, the first support rod 36 and the first housing 5 rotate together around the second shaft 33, and the structure is more stable and reliable.

[0040] The second shaft 33 is provided with a first disc spring 331 that cooperates with the first support rod 36 and a first locking member 332 that cooperates with the first disc spring 331. The number of first disc springs 331 can be one or multiple stacked in sequence. The first locking member 332 limits and locks the first disc spring 331. The first disc spring 331 can exert a certain pressure on the first support rod 36, so that the first disc spring 331 can provide frictional damping force for the rotation of the first support rod 36, thereby allowing the screen to hover freely, making operation simpler, more convenient, and more flexible. The first locking member 332 can be a lock nut, which is more convenient to operate.

[0041] The first sprocket 32, the second sprocket 34, and the first chain 35 are positioned between two symmetrically arranged first support rods 36. A first flange 333 is provided on the second shaft 33. The first locking member 332 and the first flange 333 secure the second sprocket 34, the first disc spring 331, and the two first support rods 36 in an axial direction, making operation simpler and more convenient, and the structure more stable and reliable. Similarly, the first support rod 36, the first shaft 31, and the first sprocket 32 can be arranged similarly to the above.

[0042] Since the first sprocket 32 rotates with the screen, the first shaft 31, and the first sprocket 32, the first sprocket 32 also rotates about the second shaft 33. That is, while the screen rotates on its own, it can also rotate about the second shaft 33. Therefore, a gravitational torque is generated during the movement of the screen. The screen rotation mechanism also includes a gravity balancing mechanism 4 that cooperates with the rotating assembly 3. The gravity balancing mechanism 4 can elastically support the rotating assembly 3, thereby balancing the gravitational torque of the screen, reducing damage to components, and increasing the service life of the equipment, making it safer and more reliable. Typically, the rotating assembly 3 corresponds to the gravity balancing mechanism 4 one-to-one. For example, a rotating assembly 3 is provided on both sides of the first housing 5. Each rotating assembly 3 is separately coordinated with the gravity balancing mechanism 4, resulting in a more uniform force, greater stability, and reliability.

[0043] The gravity balancing mechanism 4 includes a first slide bar 41 and a first elastic member 42 that cooperates with the first slide bar 41. A first connecting post 43 is provided at one end of the first slide bar 41. A first connecting hole 301 is provided on the rotating assembly 3, which is hingedly connected to the first connecting post 43. The first connecting hole 301 is eccentrically arranged along the second axis 33 and can be provided on the first support rod 36. The first slide bar 41 and the first elastic member 42 can be a single group or two or more groups arranged side by side. As the screen, first axis 31, and first sprocket 32 rotate together, the first connecting post 43 can rotate about the second axis 33. This rotation of the first connecting post 43 about the second axis 33 drives the first slide bar 41 to slide. The sliding of the first slide bar 41 compresses or stretches the first elastic member 42, thereby exerting a counterforce on the movement of the first connecting post 43. This elastic member 42 can elastically support the rotating assembly 3 and balance the gravitational torque of the screen.

[0044] The first sliding rod 41 and the first elastic member 42 are arranged in the second shell 46. The second shell 46 is provided with a first arc hole 461 that cooperates with the eccentric rotation of the first connecting column 43. The first arc hole 461 is coaxial with the second shaft 33. The first connecting column 43 can rotate along the first arc hole 461 with the second shaft 33 as the center, and the structure is more compact, stable, safer and more reliable.

[0045] The first elastic member 42 is a spring mounted on the first slide bar 41. The first slide bar 41 is provided with a first connector 44 hingedly connected to the first connecting column 43. The first connector 44 can be threadedly connected to one end of the first slide bar 41. A first support plate 45 is provided within the second housing 46, which is slidably connected to the first slide bar 41. The first support plate 45 is provided with a guide hole that matches the first slide bar 41. One end of the first elastic member 42 presses against the first support plate 45, and the other end presses against the first connector 44. When the first connecting column 43 rotates about the second axis 33 along the first arcuate hole 461, the first slide bar 41 is driven to slide along the guide hole in the first support plate 45. Simultaneously, the first elastic member 42 is compressed, thereby exerting a counterforce on the movement of the first connecting column 43. This elastic member 42 can elastically support the rotating assembly 3 and balance the gravitational torque of the screen. Furthermore, the second housing 46 can also be fixedly connected to the corresponding bracket together with the lower fixing plate 2.

[0046] The second housing 46 typically includes a housing and a base plate disposed at the bottom of the housing. A first arcuate hole 461 is disposed on the upper housing. The first slide rod 41 and the first elastic member 42 are located within the chamber formed by the base plate and the housing. The base plate and the housing can be connected using snap fasteners, screws, or welding, making installation and maintenance more convenient. First protrusions are disposed on either side of the first support plate 45. Slide grooves are disposed on the second housing 46 to mate with the first protrusions. The slide grooves can be disposed vertically. When the first connecting column 43 rotates along the first arcuate hole 461 with the second axis 33 as its center, the first slide rod 41 is driven to slide along the guide hole on the first support plate 45. The first protrusions allow the first support plate 45 to slide appropriately along the guide grooves to prevent it from getting stuck, thereby providing greater safety and reliability.

[0047] Compared with the prior art, the advantages of the present invention are as follows: the upper fixing plate 1 is fixedly connected to the corresponding screen, such as an LCD screen, a smart display screen, etc., the lower fixing plate 2 is fixedly connected to the corresponding bracket, and the bracket can be fixed to the ground or to a wall, etc. When the position of the screen needs to be adjusted, the screen is rotated, and the first axis 31 and the first sprocket 32 rotate together with the screen. Since the second axis 33 and the second sprocket 34 are fixed, and under the action of the first chain 35, the first sprocket 32 rotates with the second axis 33 as the center at the same time, that is, the screen can rotate with the second axis 33 as the center while rotating. Therefore, the inclination angle and height of the screen can be adjusted according to different needs, and the position of the screen relative to the bracket can also be adjusted. For example, when the bracket is installed against the wall, the screen Rotation around the second axis 33 allows the screen to maintain a suitable distance from the bracket and the wall, and the screen will not hit the wall, etc., making more effective use of space and facilitating people to better watch and use the screen. The first disc spring 331 can provide friction damping force for the rotating component 3, allowing the screen to hover freely. The gravity balancing mechanism 4 can also elastically support the rotating component 3, balance the gravity torque of the screen, reduce damage to components, and increase the service life of the equipment. The sprocket chain structure is stable and strong, and the tension adjustment component 351 facilitates the tension adjustment of the first chain 35. The operation is simple, convenient, and flexible, and the structure is compact and stable. It has high safety, stability, and reliability, and can meet people's increasingly high different usage needs, expanding the application and development of the product.

[0048] The above descriptions are merely some embodiments of the present disclosure and are intended to illustrate the technical solutions of the present disclosure, not to limit them. It should be understood that those skilled in the art may make modifications or substitutions based on the above descriptions without departing from the inventive concept of the present disclosure, and all such modifications and substitutions shall fall within the scope of protection of the appended claims of the present disclosure. In such cases, all details may be replaced with equivalent elements, and the materials, shapes, and dimensions may be arbitrary.

Claims

1. A screen rotation mechanism, characterized in that: The invention comprises an upper fixed plate (1), a lower fixed plate (2), two groups of rotating components (3), a gravity balancing mechanism (4) and a first shell (5), wherein the two groups of rotating components (3) are symmetrically arranged on both sides of the first shell (5), and the first shell (5) is provided with a second avoidance hole (51) matched with the upper fixed plate (1) and a third avoidance hole (52) matched with the lower fixed plate (2); the two groups of rotating components (3) respectively comprise a first shaft (31), a first sprocket (32) coaxial with and fixedly connected to the first shaft (31), a second shaft (33), a second sprocket (34) coaxial with and fixedly connected to the second shaft (33) and a first chain (35); the upper fixed plate (1) is fixedly connected to the first shaft (31), the lower fixed plate (2) is fixedly connected to the second shaft (33), the upper fixed plate (1) is fixedly connected to the screen, and the lower fixed plate (2) is fixedly connected to the bracket; the gravity balancing mechanism (4) comprises a first slide bar (41) and a first slide bar (41) fixedly connected to the first slide bar (41) A first elastic member (42) is matched with the first sliding rod (41), and a first connecting column (43) is provided at one end thereof. A first connecting hole (301) hinged to the first connecting column (43) is provided on the rotating assembly (3), and the first connecting hole (301) is eccentrically arranged along the second axis (33); the first axis (31) and the first sprocket (32) rotate together with the screen, and the second axis (33) and the second sprocket (34) are fixed. Under the action of the first chain (35), the screen can rotate around the first axis (31) while also rotating around the second axis (33) as the center. At the same time, the first connecting column (43) rotates around the second axis (33) as the center. The rotation of the first connecting column (43) can drive the first sliding rod (41) to slide. The sliding of the first sliding rod (41) can compress or stretch the first elastic member (42) to elastically support the rotating assembly (3) to balance the gravity torque of the screen; a tension adjustment assembly (351) is provided on the first chain (35).

2. A screen rotation mechanism according to claim 1, characterized in that: As the first sprocket (32) rotates around the second shaft (33), the first housing (5) can also rotate around the second shaft (33) in sync.

3. A screen rotation mechanism according to claim 1, characterized in that: The lower fixed 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 portion (22) for fixed connection with the screen; the first shielding cover (21) is provided with a first avoidance hole (211) matched with the first connecting portion (22).

4. A screen rotation mechanism according to claim 1, characterized in that: The first shaft (31) is hinged to one end of the first support rod (36), and the second shaft (33) is hinged to the other end of the first support rod (36). As the first sprocket (32) rotates around the second shaft (33), the first support rod (36) can rotate synchronously around the second shaft (33).

5. A screen rotation mechanism according to claim 4, characterized in that: The second shaft (33) is provided with a first disc spring (331) matched with the first support rod (36) and a first locking member (332) matched with the first disc spring (331). The first locking member (332) limits and locks the first disc spring (331). The first disc spring (331) can provide friction damping force for the rotation of the first support rod (36).

6. A screen rotation mechanism according to claim 5, characterized in that: The first sprocket (32), the second sprocket (34) and the first chain (35) are located between two symmetrically arranged first support rods (36); a first flange (333) is provided on the second shaft (33); the first locking member (332) and the first flange (333) can axially fix the second sprocket (34), the first disc spring (331) and the two first support rods (36).

7. A screen rotation mechanism according to claim 6, characterized in that: The first slide bar (41) and the first elastic member (42) are arranged in the second shell (46); the second shell (46) is provided with a first arc-shaped hole (461) matched with the eccentric rotation of the first connecting column (43); the first elastic member (42) is a spring sleeved on the first slide bar (41); the first slide bar (41) is provided with a first connecting head (44) hinged to the first connecting column (43); the second shell (46) is provided with a first supporting plate (45) slidably connected to the first slide bar (41); 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 head (44).

Images