A liquid crystal display device

Abstract

This application relates to a liquid crystal display device, specifically within the technical field of display equipment. The device includes a rear shell, a frame, a display panel assembly, and a first and second support structure located diagonally inside the rear shell. Two identical support plate assemblies are fastened to the front ends of the first and second support structures, respectively. By rotating a drive pulley assembly and its internal screw and folding support transmission mechanism, the first and second support plate assemblies can be synchronously extended forward, forming a discontinuous rectangular protective frame protruding from the front surface of the thin-film transistor liquid crystal display panel at diagonal positions. When the front of the device is subjected to an external load, the load is borne by this protective frame and transmitted to the rear shell via the support structure, effectively protecting the display panel and its thin-film transistors from direct impact. This protective mechanism is easy to operate, has a self-locking function, and the support plate assemblies can retract to restore the display state, thus balancing reliable protection with ease of use.

Description

Technical Field

[0001] This application relates to the technical field of display devices, and in particular to a liquid crystal display device. Background Technology

[0002] Thin-film transistor liquid crystal displays (TFT-LCDs) are currently the most widely used flat panel display technology, and are widely used in televisions, computer monitors, automotive screens, and various portable electronic devices. The display panel assembly consists of a TFT-LCD panel and a backlight module, with a large number of thin-film field-effect transistors (TFTs) arranged on the array substrate. Because TFTs have a delicate structure and are made of fragile materials, they are sensitive to external impacts and pressures. Therefore, the display panel assembly is a core component in the entire device that requires special protection.

[0003] Currently, Chinese patent application CN201310506611.9 discloses a liquid crystal display module, including a frame, a back panel, and a front frame. The frame features a hanging ear-type suspension component, which includes an outer side wall and an inner side wall. The inner side wall extends inward to form a platform for placing the panel. A slot is formed between the outer and inner side walls, through which the frame is suspended from the back panel. The outer side wall of the frame is hollowed out, leaving only the outer frame border. The front frame has a slotted cutout, through which it engages with the outer side wall of the frame. The back panel has a protrusion, and the front frame has a corresponding locking hole for the protrusion, allowing the protrusion to engage with the back panel for a snap-fit ​​connection. This technical solution, by changing the structure of the frame, makes the side walls of the front frame and the frame overlap, eliminating the thickness of one component and thus achieving a narrower bezel design.

[0004] However, existing technologies lack specific protective designs against external loads such as compression and impact that the front surface of the display panel may be subjected to during transportation, warehousing, stacking, or handling. In practical applications, the common practice is to attach a protective film to the panel surface or to configure an independent hard protective cover. The former mainly serves to prevent scratches, while the latter needs to be removed and stored separately before each use, which is somewhat inconvenient in daily use. Summary of the Invention

[0005] The purpose of this application is to provide a liquid crystal display device to solve the problems in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: A liquid crystal display device, which is a thin-film transistor liquid crystal display, includes a back cover, a frame, and a display panel assembly. The frame is mounted on the front side of the back cover and surrounds and fixes the outer periphery of the display panel assembly. The display panel assembly includes a thin-film transistor liquid crystal display panel and a backlight module. A plurality of thin-film field-effect transistors are disposed on the array substrate of the thin-film transistor liquid crystal display panel.

[0007] The device also includes a first support structure and a second support structure. The first support structure and the second support structure have the same construction and specifications, and are symmetrically arranged at opposite corners on the inner side of the rear shell. The front parts of the first support structure and the second support structure both extend through the inner side of the frame so that their output ends can extend to the front area of ​​the display panel assembly.

[0008] The first support structure has a first support plate group tightly attached to its front end, and the second support structure has a second support plate group tightly attached to its front end. The first and second support plate groups have the same structure, each consisting of a long rectangular plate and a short rectangular plate, which are arranged vertically. When the first and second support structures drive these two support plate groups to extend forward to a predetermined position, the two support plate groups located at opposite corners together form an intermittent rectangular frame. This rectangular frame protrudes from the front surface of the display panel assembly by a predetermined height. When the front side of the display device is subjected to an external load, the load is first borne by the protruding first and second support plate groups, thereby effectively isolating the external force from the front surface of the display panel assembly and protecting the fragile thin-film transistor liquid crystal display panel and the thin-film field-effect transistors on it behind it.

[0009] The second support structure includes a rotating head that rotates through the lower right side wall of the rear shell. One end of the rotating head located inside the rear shell is integrally fixed with a worm gear. Bearing blocks are respectively wrapped on the left and right sides of the worm gear, and the rear side of the bearing blocks is fixed to the rear shell. A worm wheel is engaged with the bottom of the worm gear, forming a reduction transmission pair with self-locking characteristics. This not only achieves a large transmission ratio, making operation easier, but also ensures that the extension or retraction position of the support plate assembly can be firmly locked after the external operating force is removed, preventing accidental retraction due to external force or vibration. The front side of the worm gear is coaxially fixed with two pulleys, and the rear middle side of the worm gear is rotatably connected to the rear housing. The outer surfaces of the two pulleys are sequentially connected to a long transmission belt and a short transmission belt from back to front. The side of the long transmission belt away from the two pulleys is connected to the first support assembly, and the side of the short transmission belt away from the two pulleys is connected to the second support assembly. This enables the synchronous but asymmetrical driving of the first and second support assemblies located at different distances, achieving a compact and efficient power distribution. The rear sides of both the first support assembly and the second support assembly are fastened to the rear shell, and their front ends are fastened to the second support plate group; wherein, the first support assembly and the second support assembly have the same structure and size, and are arranged vertically, the front end of the first support assembly is fastened to the long rectangular plate, and the front end of the second support assembly is fastened to the short rectangular plate.

[0010] Preferably, the first support assembly includes a housing that is fastened to the rear shell. A reinforcing column is embedded and fixed inside the housing. A first top component and a second top component of the same structure and size are respectively provided through the left and right sides inside the housing. This can evenly distribute the power from the single path of the transmission belt into two parallel and synchronous pushing output points, improving the pushing force and stability. The outer surface of the second top component is covered with a driven pulley and a first pulley. The driven pulley is located behind the first pulley. The outer surface of the driven pulley is connected to the long transmission belt to receive power. The outer surface of the first pulley is connected to the second pulley through a guide belt. The second pulley is wrapped and fixed to the outside of the first top component. The front ends of both the first and second top components are fastened to the second support plate group, so that the two top components can drive the second support plate group to perform a displacement action.

[0011] Preferably, the first top component includes a cylindrical base that is fastened to the rear side of the compartment cover. The outer surface of the cylindrical base is wrapped with a rotating sleeve. The inner wall of the rotating sleeve has an annular recess, and an internal toothed ring is fixedly connected to the inner wall of the recess. A power unit is engaged with the inner side of the internal toothed ring. The power unit is disposed inside the middle and rear side of the cylindrical base. The front end of the power unit is connected to the inner cylinder. The inner cylinder is inserted and slides inside the cylindrical base, and the front end of the inner cylinder is fastened to the second support plate assembly. A strip groove is provided in the middle of both the upper and lower sides of the inner cylinder. The strip groove is used to provide movement space and guidance for the unfolding of the folding support.

[0012] Preferably, the power unit includes a carrier fixed inside the rear side of the cylindrical base. A rotating column is rotatably inserted through the middle of the carrier. A circular toothed plate is fixed at the rear end of the rotating column, and a screw is integrally formed at the front end of the rotating column. The left and right sides of the circular toothed plate mesh with a first gear and a second gear, respectively. The central shafts of the first gear and the second gear are inserted and rotated inside the carrier. The sides of the first gear and the second gear that are far apart from each other mesh with an internal gear ring. Hollow slots are opened on both the left and right side walls of the cylindrical base. The first gear and the second gear rotate through the two hollow slots to achieve cross-wall meshing with the internal gear ring.

[0013] When the rotating sleeve is driven to rotate, its internal gear ring transmits torque to the first and second gears on both sides. The two gears then jointly drive the central circular gear plate and the rotating column on it to rotate, ensuring that the rotating column is subjected to balanced force and runs smoothly. The screw at the front end of the rotating column rotates accordingly, and its outer surface is threaded with an internal threaded sleeve. A push rod is provided on both the upper and lower sides of the internal threaded sleeve, and the ends of the two push rods that are far apart from each other are respectively connected to two folding supports.

[0014] The forward and reverse rotation of the screw will drive the inner screw sleeve to move back and forth along the axis. When the inner screw sleeve moves forward, it pushes the folding support to unfold outward from the folded state and extend forward through the push rod, eventually pushing the inner cylinder and the first or second support plate group at its front end forward. When the inner screw sleeve moves backward, it drives the folding support to retract, and the inner cylinder with the support plate group retracts and resets.

[0015] Preferably, the folding support includes a first V-shaped rotating rod, a guide rod is provided at the rear pivot of the first V-shaped rotating rod, the side of the guide rod away from the first V-shaped rotating rod passes through the inside of the strip groove and is fixed to the inner wall of the cylinder seat, the two ends of the front side of the first V-shaped rotating rod are rotatably connected to the two ends of the first X-shaped rotating rod, the pivot of the first X-shaped rotating rod is connected to the push rod of the inner threaded sleeve, the two ends of the front side of the first X-shaped rotating rod are rotatably connected to the second X-shaped rotating rod, and the two ends of the second X-shaped rotating rod away from the first X-shaped rotating rod are rotatably connected to the second V-shaped rotating rod, a column rod is provided at the pivot of the second V-shaped rotating rod, the side of the column rod away from the second V-shaped rotating rod is connected to the front side of the inner wall of the inner cylinder; this structure achieves a large push-out stroke with a limited installation depth and has excellent compressive rigidity.

[0016] In summary, this application includes the following beneficial technical effects: 1. This application provides reliable physical protection for the front surface of a thin-film transistor liquid crystal display panel without affecting normal display. It achieves this by symmetrically arranging two identical support structures within the device, which drive two L-shaped support assemblies to extend forward, forming a discontinuous rectangular protective frame protruding from the front surface of the display panel. When the front of the device is subjected to an external load, the load is first applied to this protective frame, and the external force is transmitted through the support assemblies and support structures to the robust rear shell. This effectively isolates the display panel assembly and its delicate thin-film field-effect transistors from external impacts, significantly reducing the risk of panel damage caused by transportation, stacking, or accidental collisions. Furthermore, when not in use, the support assemblies can be retracted back into their original positions, making operation convenient and not affecting the user's daily viewing experience.

[0017] 2. This application uses a worm gear and worm wheel as a reduction transmission pair, which not only makes manual operation of the rotating head extremely labor-saving, but also utilizes the inherent self-locking characteristics of the worm gear and worm wheel to ensure that the position of the support plate assembly can be stably locked whether it is in the extended protective state or the retracted storage state, and will not accidentally retract due to external force or vibration, thus improving the reliability and safety of use. In addition, by using double pulleys with long and short transmission belts, the power from a single operating point is synchronously distributed to the two diagonally opposite support components. Then, through the two top components connected by the guide belts inside each support component, the precise synchronous extension and retraction of the two L-shaped support plate assemblies is achieved, ensuring that the entire rectangular protective frame is pushed out and retracted evenly and smoothly, avoiding jamming or skew caused by asynchronous movement.

[0018] 3. This application highly integrates the core transmission and telescopic components, such as the screw, inner screw sleeve, and folding support, into the inside of the cylinder base, without occupying the valuable thickness space inside the rear shell. This allows the entire protective mechanism to be adapted to the design of thin display devices. The folding support adopts a bistable scissor structure composed of multiple sets of V-shaped and X-shaped rods hinged together. It achieves a large extension stroke with a limited installation depth and has excellent compressive rigidity in the unfolded state. It can withstand a large frontal load without retraction, providing a stable and reliable mechanical support for the protective frame formed by the support assembly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the structure connecting the interior of the rear shell of this application with the first support structure and the second support structure; Figure 3 This is a structural schematic diagram of the second supporting structure of this application; Figure 4 This is a bottom view of the structure of the first support component of this application; Figure 5 This is a structural schematic diagram of the first top component of this application; Figure 6 This application Figure 5 Enlarged view of the local structure at point A; Figure 7 This is a schematic diagram of the connection between the internal threaded sleeve and the push rod in this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Rear shell; 2. Frame; 3. Display panel assembly; 4. First support structure; 5. Second support structure; 6. First support plate assembly; 7. Second support plate assembly; 51. Rotating head; 52. Worm gear; 53. Bearing block; 54. Worm wheel; 55. Double pulley; 56. Long transmission belt; 57. Short transmission belt; 58. First support assembly; 59. Second support assembly; 581. Compartment cover; 582. Reinforcing column; 583. First top component; 584. Second top component; 585. Driven pulley; 586. First pulley; 587. Guide belt; 588. Second pulley; 5831. Cylinder seat; 58 32. Rotating sleeve; 5833. Internal gear ring; 5834. Power unit; 5835. Inner cylinder; 58341. Carrier; 58342. Rotating column; 58343. Circular gear plate; 58344. First gear; 58345. Second gear; 58346. Screw; 58347. Internal threaded sleeve bracket; 58348. Folding support; 583481. First V-shaped rotating rod; 583482. Guide rod; 583483. First X-shaped rotating rod; 583484. Second X-shaped rotating rod; 583485. Second V-shaped rotating rod; 583486. Column rod; 58311. Hollowed-out groove; 583471. Push rod. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0022] Example 1 This embodiment provides a liquid crystal display device, which is a thin-film transistor liquid crystal display, and mainly includes a back cover 1, a frame 2, a display panel assembly 3, a first support structure 4, and a second support structure 5.

[0023] like Figure 1 and Figure 2 As shown, the rear shell 1 constitutes the back shell of the entire display device. A frame 2 is installed at the front opening. The frame 2 surrounds and fixes the outer periphery of the display panel assembly 3, and firmly clamps the display panel assembly 3 between the frame 2 and the rear shell 1. The display panel assembly 3 is a stacked structure, including a thin-film transistor liquid crystal display panel and a backlight module. The array substrate of the thin-film transistor liquid crystal display panel integrates tens of thousands of thin-film field-effect transistors for pixel control. In normal use, the front surface of the display panel assembly 3 is the image display surface of the entire display device.

[0024] To address the technical problem of the front surface of large-size thin-film transistor liquid crystal display panels being easily damaged by external impacts when not in use or during transportation, this embodiment incorporates an active front protection mechanism inside the rear shell 1; such as Figures 1 to 3 As shown, the mechanism is mainly composed of a first support structure 4 and a second support structure 5. The first support structure 4 and the second support structure 5 have the same structure and size, and are respectively arranged at two opposite corners inside the rear shell 1 in a symmetrical manner. The front output parts of the two pass through the corresponding openings inside the frame 2, and can extend to the front area of ​​the display panel assembly 3 under drive.

[0025] The front end of the first support structure 4 is fixedly connected to the first support plate group 6, and the front end of the second support structure 5 is fixedly connected to the second support plate group 7. The first support plate group 6 and the second support plate group 7 have the same structure, each consisting of a long rectangular plate and a short rectangular plate vertically distributed to form an "L" shape. When the two support structures drive the two "L" shaped support plate groups to extend forward synchronously to a predetermined position, the two support plate groups located at the diagonal positions together form an intermittent rectangular frame. The plane of the rectangular frame is higher than the front surface of the thin-film transistor liquid crystal display panel by a predetermined height, thereby forming a physical barrier on the front side of the display panel. When the front side of the display device is subjected to an external load, the load will first contact and act on the protruding first support plate group 6 and the second support plate group 7. The external force is transmitted to the rear shell 1 through the support plate group and the support structure, thereby effectively protecting the display panel assembly 3 and the thin-film field-effect transistors on it from direct impact.

[0026] Taking the second supporting structure 5 as an example, such as Figure 2 , Figure 3 As shown, the second support structure 5 includes a rotating head 51 protruding from the lower right side wall of the rear shell 1. This rotating head 51 is operated manually or rotated using tools. One end of the rotating head 51, located inside the rear shell 1, is integrally fixed to a worm gear 52. The left and right ends of the worm gear 52 are rotatably supported by bearing blocks 53. The rear side of the bearing blocks 53 is fixedly connected to the rear shell 1. A worm wheel 54 meshes with the worm gear 52 below, forming a self-locking reduction transmission pair. A double pulley 55 is coaxially fixedly connected to the front side of the worm wheel 54, and the rear shaft of the worm wheel 54 is rotatably connected to the rear shell 1. When the rotating head 51 drives the worm gear 52 to rotate, it drives the worm wheel 54 and... The two pulleys 55 rotate together. The two pulleys 55 have two belt grooves of the same diameter at the front and rear, which are used to drive the long transmission belt 56 and the short transmission belt 57 respectively. The side of the long transmission belt 56 away from the two pulleys 55 is wound around and connected to the input end of the first support assembly 58, while the side of the short transmission belt 57 away from the two pulleys 55 is wound around and connected to the input end of the second support assembly 59. The rear housings of the first support assembly 58 and the second support assembly 59 are both fastened to the rear housing 1, and their front movable ends are fastened to the long rectangular piece and the short rectangular piece of the second support plate group 7 respectively. Thus, the rotating head 51 can synchronously drive the first support assembly 58 and the second support assembly 59 to perform telescopic movements through this transmission path.

[0027] The first support assembly 58 and the second support assembly 59 are identical in structure and size, differing only in their perpendicular orientation. Taking the first support assembly 58 as an example... Figure 3 , Figure 4As shown, the first support assembly 58 includes a hood 581 that serves as the main frame, which is fastened to the rear shell 1 at its rear. A reinforcing column 582 for improving structural strength is fixedly embedded in the center of the hood 581. The first top component 583 and the second top component 584 are respectively provided through the internal space of the hood 581. The outer surface of the second top component 584 is wrapped and fixed with the driven pulley 585 and the first pulley 586 from back to front. The power of the long transmission belt 56 is first input to the driven pulley 585, driving the entire internal mechanism of the second top component 584 to move. At the same time, the first pulley 586 is connected to the second pulley 588 on the first top component 583 through a guide belt 587, so as to transmit the power synchronously to the first top component 583 and realize the synchronous operation of the two top components. The front end protrusions of the first top component 583 and the second top component 584 are both fastened to the second support plate group 7.

[0028] The first top component 583 and the second top component 584 have the same structure. Taking the first top component 583 as an example, Figures 5 to 7 As shown, the first top component 583 includes a cylindrical base 5831, the rear end of which is fixed to the hood 581. A rotating sleeve 5832 is rotatably fitted on the outer surface of the cylindrical base 5831. A second pulley 588 is fixed on this rotating sleeve 5832. An annular recess is provided on the inner wall of the rotating sleeve 5832, and an internal toothed ring 5833 is fixed in the recess. The inner side of the internal toothed ring 5833 meshes with the input end of the power unit 5834. The main body of the power unit 5834 passes through and is fixed to the rear side of the inner side of the cylindrical base 5831. Its front end is connected to an inner cylinder 5835. The inner cylinder 5835 is slidably fitted in the front end of the inner side of the cylindrical base 5831. Its front end face extends out of the cylindrical base 5831 and is fastened to the second support plate group 7.

[0029] When the rotating sleeve 5832 rotates under the drive of the second pulley 588, its internal gear ring 5833 drives the power unit 5834 to work. The power unit 5834 converts the rotational motion into the linear extension and retraction motion of the inner cylinder 5835. The power unit 5834 includes a carrier 58341 that passes through and is fixed inside the cylinder seat 5831. A rotating column 58342 is rotatably inserted through the center of the carrier 58341. A circular gear 58343 is fixed to the rear end of the rotating column 58342, and a screw 58346 is integrally formed at the front end. The left and right sides of 343 are symmetrically meshed with a first gear 58344 and a second gear 58345. The shafts of the first gear 58344 and the second gear 58345 are both mounted on the carrier 58341, and a portion of their teeth are exposed outward through the hollowed-out groove 58311 on the side wall of the sleeve 5831, meshing with the internal gear ring 5833 on the rotating sleeve 5832 to form a planetary gear system. Power is transmitted from the internal gear ring 5833 and drives the circular toothed plate 58343 at the center of the two planetary gears, ensuring smooth transmission and high torque.

[0030] An inner threaded sleeve 58347 is provided on the outer side of the screw 58346 via a threaded connection. A push rod 583471 is provided at the upper and lower ends of the inner threaded sleeve 58347. When the screw 58346 rotates, the inner threaded sleeve 58347 cannot rotate due to the circumferential restriction of the folding support 58348 connected to it. It can only move back and forth along the axial direction under the drive of the thread. The linear movement of the inner threaded sleeve 58347 then drives the two folding support 58348 to move through the push rod 583471.

[0031] The folding support 58348 is formed by hinged connections of multiple V-shaped and X-shaped rods. Specifically, its rear end is a first V-shaped rotating rod 583481 with its V-shaped tip pointing rearward. A guide rod 583482 is movably inserted through the pivot point at the tip. The two ends of the guide rod 583482 pass through the strip groove inside the cylinder seat 5831 and are fixed to the inner wall of the cylinder seat 5831, serving as the rear fulcrum of the entire support. The two front forks of the first V-shaped rotating rod 583481 rotate with the two rear arms of a first X-shaped rotating rod 583483. The connection is as follows: the central pivot of the first X-shaped rotating rod 583483 is connected to the push rod 583471 of the inner threaded sleeve 58347; the two front arms of the first X-shaped rotating rod 583483 are rotatably connected to the two rear arms of the second X-shaped rotating rod 583484; the two front arms of the second X-shaped rotating rod 583484 are rotatably connected to the fork arm of a second V-shaped rotating rod 583485; the tip of the second V-shaped rotating rod 583485 faces forward, and its central pivot is fixedly connected to the front side of the inner wall of the inner cylinder 5835 through a column rod 583486.

[0032] The work process is as follows: First, when frontal protection is required before transportation or storage, the rotating head 51 is rotated, and the torque is transmitted through the worm 52, worm wheel 54, double pulleys 55, long transmission belt 56 and short transmission belt 57, ultimately driving the rotating sleeve 5832 in the first support assembly 58 and the second support assembly 59 to rotate.

[0033] Second, the internal gear ring 5833 inside the rotating sleeve 5832 drives the screw 58346 to rotate forward through the gear set, causing the inner screw sleeve 58347 to move forward. The push rod 583471 of the inner screw sleeve 58347 pushes the center of the first X-shaped rotating rod 583483 forward, forcing the entire folding support 58348 to deform around the guide rod 583482 at its rear. During the deformation process, each level of X-shaped rod extends axially, pushing the second V-shaped rotating rod 583485 at the front end and causing the inner cylinder 5835 to extend forward smoothly.

[0034] Third, when the folding support 58348 is unfolded into place, the inner cylinder 5835 is pushed out to the maximum extent, and the first support group 6 and the second support group 7, which are fastened to its front end, are also pushed out to the predetermined position, forming an intermittent rectangular protective frame protruding from the panel plane on the periphery of the front surface of the display panel. At this time, the front surface of the display panel is effectively isolated from the external environment by the protective frame.

[0035] Fourth, when it is necessary to restore the normal use state, the rotating head 51 is rotated in the opposite direction, the entire transmission chain moves in the opposite direction, the screw 58346 reverses and drives the inner screw sleeve 58347 to move backward, and the push rod 583471 pulls the folding support 58348 backward, so that it is orderly folded and retracted into the cylinder seat 5831. The inner cylinder 5835 then moves back and resets along with the first support group 6 and the second support group 7, and the front surface of the display panel assembly 3 is restored to a complete and unobstructed state.

[0036] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A liquid crystal display device, the liquid crystal display device being a thin film transistor liquid crystal display, comprising a rear shell (1), a frame (2) and a display panel assembly (3), wherein the frame (2) is mounted on the front side of the rear shell (1), and the frame (2) surrounds and fixes the outer periphery of the display panel assembly (3); characterized in that It also includes a first support structure (4) and a second support structure (5). The first support structure (4) and the second support structure (5) have the same structure and size, and are symmetrically arranged at the diagonal positions on the inner side of the rear shell (1). The front parts of the first support structure (4) and the second support structure (5) both penetrate through the inner side of the frame (2). The front end of the first support structure (4) is tightly fitted with a first support plate group (6), and the front end of the second support structure (5) is tightly fitted with a second support plate group (7). The second support structure (5) includes a rotating head (51) that penetrates and rotates through the lower right side wall of the rear shell (1). One end of the rotating head (51) located inside the rear shell (1) is integrally fixed with a worm gear (52). The left and right sides of the worm gear (52) are respectively wrapped with bearing blocks (53), and the bearings are... The block (53) is fixed to the rear shell (1) at the rear side. The worm (52) is engaged with a worm wheel (54) at the bottom. The front side of the worm wheel (54) is coaxially fixed with a double pulley (55). The rear middle side of the worm wheel (54) is rotatably connected to the rear shell (1). The outer surface of the double pulley (55) is connected to a long transmission belt (56) and a short transmission belt (57) from back to front. The side of the long transmission belt (56) away from the double pulley (55) is connected to the first support assembly (58). The side of the short transmission belt (57) away from the double pulley (55) is connected to the second support assembly (59). The rear sides of the first support assembly (58) and the second support assembly (59) are both fastened to the rear shell (1), and their front ends are both fastened to the second support plate group (7).

2. The liquid crystal display device according to claim 1, wherein: The display panel assembly (3) includes a thin-film transistor liquid crystal display panel and a backlight module. The array substrate of the thin-film transistor liquid crystal display panel is provided with multiple thin-film field-effect transistors.

3. The liquid crystal display device according to claim 1, wherein: The first sheet group (6) and the second sheet group (7) have the same structure, each consisting of a long rectangular sheet and a short rectangular sheet, which are arranged vertically.

4. The liquid crystal display device according to claim 3, wherein: The first support assembly (58) and the second support assembly (59) have the same structure and size, and are arranged vertically. The front end of the first support assembly (58) is fastened to the long rectangular piece, and the front end of the second support assembly (59) is fastened to the short rectangular piece.

5. The liquid crystal display device according to claim 1, wherein: The first support assembly (58) includes a hood (581) that is fastened to the rear shell (1) on the rear side. A reinforcing column (582) is embedded and fixed inside the hood (581). A first top component (583) and a second top component (584) of the same structure and size are respectively provided through the left and right sides inside the hood (581). The outer surface of the second top component (584) is wrapped with a driven pulley (585) and a first pulley (586). The driven pulley (585) is located behind the first pulley (586). The outer surface of the driven pulley (585) is connected to a long transmission belt (56). The outer surface of the first pulley (586) is connected to the second pulley (588) through a guide belt (587). The second pulley (588) is wrapped and fixed outside the first top component (583). The front ends of the first top component (583) and the second top component (584) are both fastened to the second support plate group (7).

6. The liquid crystal display device according to claim 5, wherein: The first top component (583) includes a cylinder seat (5831) that is fastened to the rear side of the hood (581). The outer surface of the cylinder seat (5831) is wrapped with a rotating sleeve (5832). The inner wall of the rotating sleeve (5832) has an annular recess, and the inner wall of the recess is fixedly connected to an internal toothed ring (5833). The inner side of the internal toothed ring (5833) is engaged with a power unit (5834). The power unit (5834) is disposed inside the cylinder seat (5831) in the middle and rear side. The front end of the power unit (5834) is connected to the inner cylinder (5835). The inner cylinder (5835) is inserted and slides inside the cylinder seat (5831). The front end of the inner cylinder (5835) is fastened to the second support plate group (7). A strip groove is opened in the middle of the upper and lower sides of the inner cylinder (5835).

7. The liquid crystal display device according to claim 6, wherein: The power unit (5834) includes a carrier (58341) that is fixed inside the rear side of the cylindrical base (5831). A rotating column (58342) is rotatably inserted through the middle of the carrier (58341). A circular gear (58343) is fixed to the rear end of the rotating column (58342), and a screw (58346) is integrally formed at the front end of the rotating column (58342). The left and right sides of the circular gear (58343) mesh with a first gear (58344) and a second gear (58345) respectively. The first gear (58344) and the second gear (58345) are both inserted into the carrier (58341) at the central shaft. The sides of the first gear (58344) and the second gear (58345) that are far apart from each other are both engaged with the internal gear ring (5833). The outer surface of the screw (58346) is threaded with an internal thread sleeve (58347). A folding support (58348) is connected to both sides of the internal thread sleeve (58347). The two folding supports (58348) that are far apart from each other are both installed through the inside of the strip groove.

8. The liquid crystal display device according to claim 7, wherein: The left and right side walls of the cylinder base (5831) are provided with hollow grooves (58311), and the first gear (58344) and the second gear (58345) respectively pass through and rotate inside the two hollow grooves (58311).

9. The liquid crystal display device according to claim 7, wherein: The inner threaded sleeve (58347) is provided with a push rod (583471) on both the upper and lower sides, and the ends of the two push rods (583471) that are far apart from each other are respectively connected to two folding supports (58348).

10. The liquid crystal display device according to claim 9, wherein: The folding support (58348) includes a first V-shaped rotating rod (583481). A guide rod (583482) is provided at the rear pivot of the first V-shaped rotating rod (583481). The side of the guide rod (583482) away from the first V-shaped rotating rod (583481) passes through the inside of the strip groove and is fixed to the inner wall of the cylinder seat (5831). The two ends of the front side of the first V-shaped rotating rod (583481) are rotatably connected to the two ends of the first X-shaped rotating rod (583483). The pivot of the first X-shaped rotating rod (583483) is connected to the inner threaded sleeve (5834). 7) is connected to the push rod (583471). The two ends of the front side of the first X-shaped rotating rod (583483) are rotatably connected to the second X-shaped rotating rod (583484), and the two ends of the second X-shaped rotating rod (583484) away from the first X-shaped rotating rod (583483) are rotatably connected to the second V-shaped rotating rod (583485). A column rod (583486) is provided at the pivot of the second V-shaped rotating rod (583485). The side of the column rod (583486) away from the second V-shaped rotating rod (583485) is connected to the front side of the inner wall of the inner cylinder (5835).

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