Multi-directional angle-adjustable car rear-row vehicle-mounted display screen

Abstract

The application relates to the technical field of vehicle-mounted display devices, and particularly discloses a multi-direction and angle-adjustable vehicle-mounted display screen for the rear row of a car, which comprises a display screen mounting plate, the back of the display screen mounting plate is provided with a seat backrest base, the two ends of the side of the seat backrest base close to the display screen mounting plate are fixedly connected with backrest side fixing plates, the side of the backrest side fixing plate close to the display screen mounting plate is provided with a first connecting sleeve, the back of the display screen mounting plate is fixedly connected with display screen side fixing plates on the two sides, and the side of the display screen side fixing plate close to the seat backrest base is provided with a second connecting sleeve. The self-locking structure formed by the cooperation of the ball, the arc-shaped track groove and the multi-gear positioning groove is used to replace the traditional cam structure, sliding friction is converted into rolling friction, the abrasion amount after long-term use is greatly reduced, the problems of shaft loosening and screen shaking caused by cam abrasion are avoided, and the adjusted viewing angle can be stably maintained even if the vehicle shakes.

Description

Technical Field

[0001] This invention relates to the field of vehicle display equipment technology, specifically to a multi-directional angle-adjustable rear-seat vehicle display screen. Background Technology

[0002] With the continuous upgrading of automotive cabin entertainment functions, rear-seat in-vehicle displays have become a common feature in mid-to-high-end models. They are mainly installed behind the front seatbacks, providing rear passengers with entertainment functions such as audio-visual playback and information display. To accommodate the viewing needs of passengers of different heights and sitting postures, rear-seat displays usually need to have angle adjustment capabilities, which are achieved through a connecting hinge.

[0003] In existing technologies, the connecting hinges of rear-seat in-vehicle displays mostly employ a cam-type positioning structure. After frequent and prolonged adjustments, the cam contact surface is prone to wear, leading to loosening of the hinge and reduced positioning force. This causes the screen to wobble and slip during bumpy driving, making it difficult to maintain a stable viewing angle after adjustment. Furthermore, most products only support two fixed positions: unfolding and folding, failing to provide multi-level, precise angle adjustment and thus failing to meet the viewing angle needs of different passengers. In addition, debris from internal wear can accumulate in the enclosed cavity, causing abnormally high torque, stiff rotation, or even jamming. Moreover, wear cannot be compensated for with pre-tightening, requiring complete hinge replacement, resulting in high maintenance costs and directly impacting the lifespan and user experience of the in-vehicle display. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-directional angle-adjustable rear-seat vehicle display screen, which solves the problems of rapid wear of the rotating shaft, poor positioning stability, limited angle adjustment levels, inability to compensate for wear, and susceptibility to jamming in existing rear-seat vehicle display screens.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A multi-directional angle-adjustable rear-seat vehicle display screen, comprising a display screen mounting plate, a seat back base disposed on one side of the back of the display screen mounting plate, and two backrest side fixing plates fixedly connected to both ends of the seat back base near the display screen mounting plate. A first connecting sleeve is disposed on the side of the backrest side fixing plate near the display screen mounting plate, and display screen side fixing plates are fixedly connected to both sides of the back of the display screen mounting plate. A second connecting sleeve is disposed on the side of the display screen side fixing plate near the seat back base. The vehicle's rear-seat display screen includes two connecting sleeves, with a connecting shaft inside the first and second connecting sleeves. The screen also includes a shaft connecting assembly and an angle limiting assembly. The shaft connecting assembly is located on the outer wall of the connecting shaft; the angle limiting assembly is located inside the second connecting sleeve and outside the connecting shaft. The connecting shaft is connected to the first and second connecting sleeves via the shaft connecting assembly, allowing the second connecting sleeve to rotate relative to the first connecting sleeve. This enables multi-position tilt angle adjustment of the display screen mounting plate relative to the seat back base. The angle limiting assembly locks and fixes the connecting shaft after rotation adjustment.

[0006] Preferably, the shaft connection assembly includes a first gasket, a limiting sleeve, a follower sleeve, a first abutment, a shaft connection structure, and a follower connection structure. The first gasket is sleeved on the outer wall of the connecting shaft and is fitted to the inner wall of the first connecting sleeve. The limiting sleeve is sleeved on the outer wall of the connecting shaft and located on the side of the first gasket closer to the second connecting sleeve, and is fitted to the inner walls of the first and second connecting sleeves. The follower sleeve is fitted to the side of the limiting sleeve away from the first gasket, and its inner wall is fitted with the outer wall of the connecting shaft with a gap, while its outer wall is fitted to the inner wall of the second connecting sleeve. The first abutment is disposed on the shaft connection structure. The following sleeve is located away from the limiting sleeve on one side, and its outer wall is fitted with the inner wall of the second connecting sleeve with a clearance fit. The shaft connection structure is disposed on the outer wall of the connecting shaft. The following connection structure is disposed on the outer wall of the following sleeve. The connecting shaft is relatively fixed in position with the first connecting sleeve, the limiting sleeve, and the first abutment through the shaft connection structure. The following sleeve is relatively fixed in position with the second connecting sleeve through the following connection structure. When the display mounting plate is tilted relative to the seat back base, the second connecting sleeve drives the following sleeve to rotate along the outer wall of the connecting shaft, and rotates relative to the limiting sleeve and the first abutment.

[0007] Preferably, the shaft connection structure includes a quadrangular hole, a limiting cap, a quadrangular prism, an external spline, a spline hole, a locking protrusion, and a locking groove. The quadrangular hole is located on the inner wall of the first connecting sleeve away from the second connecting sleeve. The limiting cap is located at the end of the connecting shaft away from the second connecting sleeve and is fitted to the inner wall of the first connecting sleeve. The quadrangular prism is located on the outer wall of the connecting shaft and on the side of the limiting cap close to the second connecting sleeve, and is fitted to the inner wall of the quadrangular hole. The external spline is located on the outer wall of the connecting shaft. The spline hole is located on the inner wall of the first abutment and is fitted to the outer wall of the external spline. The locking protrusion is located on both sides of the outer wall of the connecting shaft. The locking groove is located on both sides of the outer wall of the limiting sleeve and is fitted to the outer wall of the locking protrusion. The quadrangular hole and the quadrangular prism, the external spline and the spline hole, and the locking protrusion and the locking groove work together to ensure that the positions of the connecting shaft, the first connecting sleeve, the limiting sleeve, and the first abutment are relatively fixed.

[0008] Preferably, the follower connection structure includes a first limiting groove and a limiting protrusion. The first limiting groove is disposed on the upper and lower sides of the inner wall of the second connecting sleeve. The limiting protrusion is disposed on the upper and lower sides of the outer wall of the follower sleeve and is connected to the inner wall of the first limiting groove. The cooperation between the first limiting groove and the limiting protrusion ensures that the positions of the follower sleeve and the second connecting sleeve are relatively fixed. When the display mounting plate is tilted, the follower sleeve can rotate synchronously with the second connecting sleeve along the connecting shaft.

[0009] Preferably, the angle limiting component includes a second limiting groove, a limiting block, a second abutment, an angle self-locking structure, a abutment component, and a retraction damping structure. The second limiting groove is disposed on both sides of the end of the limiting sleeve near the follower sleeve. The limiting block is disposed on the upper and lower sides of the end of the follower sleeve near the limiting sleeve and is fitted to the inner wall of the second limiting groove. The second abutment is disposed on the side of the first abutment away from the follower sleeve, and its inner wall is fitted to the outer wall of the external spline. The angle self-locking structure is disposed on the side of the follower sleeve and the first abutment close to each other. The clamping assembly is located on the side of the first clamping seat and the second clamping seat that are close to each other; the retraction damping structure is located on the side of the second clamping seat that is away from the first clamping seat; wherein, by the movement of the limiting block inside the second limiting groove, the rotation angle range of the follower sleeve is limited, and the position of the vehicle display screen is fixed in multiple adjustment angles and retracted states by the angle self-locking structure; the clamping assembly keeps the first clamping seat and the follower sleeve axially clamped; and the retraction damping structure provides buffer damping when the vehicle display screen rotates to the retracted position.

[0010] Preferably, the angle self-locking structure includes a ball bearing, an arc-shaped track groove, and a positioning groove. Two balls bearings are provided, each located on the side of the follower sleeve near the first abutment. Two arc-shaped track grooves are provided, each located on the side of the first abutment near the follower sleeve, and are fitted to the outer wall of the balls. A plurality of positioning grooves are provided, evenly distributed along the extension direction of the arc-shaped track grooves, and all are fitted to the outer wall of the balls. When the follower sleeve rotates relative to the first abutment, the balls roll along the arc-shaped track grooves. When the vehicle display screen rotates to any adjustment angle or retracted state, the balls engage with the corresponding positioning grooves, achieving self-locking fixation at the corresponding rotation angle.

[0011] Preferably, the clamping assembly includes a disc spring, a silencing plate, a threaded fixing end, a threaded sleeve, and a clamping nut. The disc spring is sleeved on the outer wall of the connecting shaft and located on the side where the first clamping seat and the second clamping seat are close to each other. The silencing plate is sleeved on the outer wall of the connecting shaft and located at both ends of the disc spring, and respectively clamps against the first clamping seat and the second clamping seat. The threaded fixing end is located at the end of the connecting shaft away from the limiting cap. The threaded sleeve is threadedly connected to the outer wall of the threaded fixing end and clamps against the end of the second clamping seat away from the disc spring. The clamping nut is threadedly connected to the outer wall of the threaded fixing end and clamps against the end of the threaded sleeve away from the second clamping seat. By tightening the threaded sleeve and the clamping nut, the disc spring is compressed to produce elastic deformation, and the first clamping seat is pushed to compress the follower sleeve, so that the follower sleeve maintains stable axial clamping with the first clamping seat and the limiting sleeve.

[0012] Preferably, the retraction damping structure includes a first fixing hole, a second fixing hole, and a torsion spring. The first fixing hole is located on the outer wall of the end of the second abutment away from the first abutment. The second fixing hole is located on the inner wall of the end of the second connecting sleeve away from the first connecting sleeve. The torsion spring is sleeved on the outside of the threaded sleeve, and its two ends are respectively engaged with the inner walls of the first fixing hole and the second fixing hole. When the vehicle display screen is rotated to the retracted state, the torsion spring is twisted to the pre-tightened position, providing retraction buffer damping through its own torque to prevent the display screen from being bumped when retracted, while improving the operation feel of angle adjustment.

[0013] Preferably, a dustproof structure is provided at the ends of the first connecting sleeve and the second connecting sleeve that are far apart from each other. The dustproof structure includes a slot and a cover. Two sets of slots are provided, which are respectively opened on the inner walls of the ends of the first connecting sleeve and the second connecting sleeve that are far apart from each other. Two covers are provided, which are respectively connected to the inner walls of the ends of the first connecting sleeve and the second connecting sleeve that are far apart from each other, and are also connected to the inner walls of the slots.

[0014] Beneficial effects: 1. A self-locking structure using ball bearings, arc-shaped track grooves, and multi-position positioning grooves replaces the traditional cam structure, converting sliding friction into rolling friction. This significantly reduces wear after long-term use and avoids issues such as loosening of the rotating shaft and screen shaking caused by cam wear. Even when the vehicle is moving and experiencing bumps, the adjusted viewing angle can be maintained stably, improving the reliability of use in in-vehicle scenarios.

[0015] 2. Multiple sets of evenly distributed positioning slots are set along the arc-shaped track groove to realize multi-level tilt angle adjustment, which can adapt to the viewing angle needs of passengers with different heights and sitting postures in the rear row. Compared with the traditional two-level structure, the flexibility of use is significantly improved.

[0016] 3. The pre-tightening structure composed of disc spring and adjustable threaded sleeve ensures that all mating end faces inside the shaft always remain tightly fitted. When slight wear occurs after long-term use, simply tightening the threaded sleeve can adjust the pre-tightening force and offset the wear gap, eliminating the need to replace the entire shaft. This effectively extends the product's service life and reduces maintenance costs.

[0017] 4. A retraction damping structure is set up to provide reverse buffer resistance when the display screen approaches the retracted position, so as to avoid damage to the screen and housing structure from hard collisions during retraction, while improving the operation quality; together with the end dustproof structure, it can prevent dust and debris from entering the shaft, preventing the accumulation of impurities from causing rotation jamming, and adapting to the complex use environment inside the vehicle.

[0018] 5. Rotational friction is concentrated on the end faces of the limiting sleeve, the follower sleeve, and the abutment seat. The core connecting shaft and the connecting sleeve do not participate in frictional wear, thus achieving separation of the wear parts from the core parts and further improving the overall durability and service life of the shaft. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the appearance of the present invention; Figure 3 This is a schematic diagram of the backrest side fixing plate, the display screen side fixing plate, and the second connecting sleeve in this invention. Figure 4 This is a schematic diagram showing the appearance of the limiting sleeve, the follower sleeve, and the disc spring in this invention; Figure 5 This is a cross-sectional view of the second connecting sleeve, the first limiting groove, and the display screen side fixing plate in this invention; Figure 6 This is a cross-sectional view of the first connecting sleeve, the square hole, and the slot in this invention. Figure 7 This is a schematic diagram showing the external appearance of the connecting shaft, locking cam, and external spline in this invention; Figure 8This is a schematic diagram of the appearance of the limiting sleeve, locking groove, and second limiting groove in this invention; Figure 9 This is a schematic diagram showing the appearance of the follower sleeve, the limiting protrusion, and the ball in this invention; Figure 10 This is a schematic diagram showing the external appearance of the first clamping seat, spline hole, and arc-shaped track groove in this invention; Figure 11 This is a schematic diagram showing the external appearance of the second abutment and the first fixing hole in this invention; Figure 12 for Figure 1 A magnified view of a portion of region A in the middle.

[0020] In the diagram: 1. Display screen mounting plate; 2. Seat backrest base; 3. Backrest side fixing plate; 4. First connecting sleeve; 5. Display screen side fixing plate; 6. Second connecting sleeve; 7. Connecting shaft; 8. Shaft connection assembly; 9. Angle limiting assembly; 10. Dustproof structure; 81. First gasket; 82. Limiting sleeve; 83. Follower sleeve; 84. First abutment; 85. Shaft connection structure; 86. Follower connection structure; 851. Quadrilateral hole; 852. Limiting cap; 853. Quadrilateral prism; 854. External spline; 855. Spline hole; 856. Locking protrusion; 8 57. Locking groove; 861. First limiting groove; 862. Limiting protrusion; 91. Second limiting groove; 92. Limiting block; 93. Second abutment seat; 94. Angle self-locking structure; 95. Abutment assembly; 96. Closing damping structure; 941. Ball bearing; 942. Arc-shaped track groove; 943. Positioning groove; 951. Disc spring; 952. Silencing plate; 953. Threaded fixing end; 954. Threaded sleeve; 955. Abutment nut; 961. First fixing hole; 962. Second fixing hole; 963. Torsion spring; 101. Slot; 102. Cover. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-12This invention provides a technical solution: a multi-directional angle-adjustable rear-seat vehicle display screen, including a display screen mounting plate 1 for fixing the vehicle display screen; a seat back base 2 fixedly installed on the back of the front seat of the car, serving as the mounting base for the entire display screen; a seat back base 2 is provided on one side of the back of the display screen mounting plate 1; two ends of the seat back base 2 near the display screen mounting plate 1 are fixedly connected to backrest side fixing plates 3; a first connecting sleeve 4 is provided on the side of the backrest side fixing plate 3 near the display screen mounting plate 1; display side fixing plates 5 are fixedly connected to both sides of the back of the display screen mounting plate 1; the display side fixing plates 5 are located near the seat back base 2. A second connecting sleeve 6 is provided on one side. A connecting shaft 7 is provided inside the first connecting sleeve 4 and the second connecting sleeve 6. The car rear-seat display screen also includes a shaft connecting assembly 8 and an angle limiting assembly 9. The shaft connecting assembly 8 is provided on the outer wall of the connecting shaft 7. The angle limiting assembly 9 is provided inside the second connecting sleeve 6 and located on the outside of the connecting shaft 7. The connecting shaft 7 is connected to the first connecting sleeve 4 and the second connecting sleeve 6 through the shaft connecting assembly 8, so that the second connecting sleeve 6 can rotate relative to the first connecting sleeve 4, realizing multi-level tilt angle adjustment of the display screen mounting plate 1 relative to the seat back base 2. The angle limiting assembly 9 locks and fixes the angle of the connecting shaft 7 after rotation adjustment.

[0023] All parts of the rotating shaft are made of stainless steel. There is no direct contact between the connecting shaft 7 and the second connecting sleeve 6. Relative rotation is achieved through the shaft connecting assembly 8, and the position after adjustment or retraction is limited and fixed by the angle limiting assembly 9. The positioning self-locking structure with ball bearings 941 and multi-position positioning grooves replaces the traditional cam structure, so that the display mounting plate 1 can rotate smoothly and stably relative to the seat back base 2, and better maintain its position in multiple pitch angles and retraction states. This avoids contact wear between the connecting shaft 7 and the second connecting sleeve 6, as well as the problem of loosening or jamming of the rotating shaft due to wear after long-term use of the traditional cam structure, thus improving the user experience and service life of the vehicle rear display screen.

[0024] Furthermore, the shaft connection assembly 8 includes a first gasket 81, a limiting sleeve 82, a follower sleeve 83, a first abutment 84, a shaft connection structure 85, and a follower connection structure 86. The first gasket 81 is sleeved on the outer wall of the connecting shaft 7 and is fitted to the inner wall of the first connecting sleeve 4; the limiting sleeve 82 is sleeved on the outer wall of the connecting shaft 7 and located on the side of the first gasket 81 near the second connecting sleeve 6, and is fitted to the inner walls of the first connecting sleeve 4 and the second connecting sleeve 6; the follower sleeve 83 is fitted to the side of the limiting sleeve 82 away from the first gasket 81, and its inner wall is fitted to the outer wall of the connecting shaft 7 with a gap, and its outer wall is fitted to the inner wall of the second connecting sleeve 6; the first abutment 84 is disposed on the follower connection structure 86. The movable sleeve 83 is located away from the limiting sleeve 82, and its outer wall is fitted with the inner wall of the second connecting sleeve 6 with a clearance fit. The shaft connection structure 85 is disposed on the outer wall of the connecting shaft 7. The follower connection structure 86 is disposed on the outer wall of the follower sleeve 83. The connecting shaft 7 is relatively fixed in position with the first connecting sleeve 4, the limiting sleeve 82 and the first abutment 84 through the shaft connection structure 85. The follower sleeve 83 is relatively fixed in position with the second connecting sleeve 6 through the follower connection structure 86. When the display mounting plate 1 is tilted relative to the seat back base 2, the second connecting sleeve 6 drives the follower sleeve 83 to rotate along the outer wall of the connecting shaft 7 and rotates relative to the limiting sleeve 82 and the first abutment 84.

[0025] The limiting sleeve 82, the following sleeve 83, and the first abutment 84 form a spaced support structure between the second connecting sleeve 6 and the connecting shaft 7. During the flip adjustment of the display mounting plate 1, more friction is transferred to the end faces of the limiting sleeve 82, the following sleeve 83, and the first abutment 84, reducing the wear of the first connecting sleeve 4, the second connecting sleeve 6, and the connecting shaft 7, effectively reducing the amount of wear after long-term use, improving the stability of the shaft rotation, and extending the service life of the connecting shaft.

[0026] Furthermore, the shaft connection structure 85 includes a square hole 851, a limiting cap 852, a square prism 853, an external spline 854, a spline hole 855, a locking protrusion 856, and a locking groove 857. The square hole 851 is located on the inner wall of the first connecting sleeve 4 away from the second connecting sleeve 6; the limiting cap 852 is located at the end of the connecting shaft 7 away from the second connecting sleeve 6 and is fitted to the inner wall of the first connecting sleeve 4; the square prism 853 is located on the outer wall of the connecting shaft 7 and is located on the side of the limiting cap 852 close to the second connecting sleeve 6, and is fitted to the inner wall of the square hole 851; the external spline 854... 4 is set on the outer wall of the connecting shaft 7; the spline hole 855 is set on the inner wall of the first abutment 84 and is connected to the outer wall of the outer spline 854; the locking protrusion 856 is set on both sides of the outer wall of the connecting shaft 7; the locking groove 857 is set on both sides of the outer wall of the limiting sleeve 82 and is connected to the outer wall of the locking protrusion 856; wherein, through the cooperation of the quadrangular hole 851 and the quadrangular prism 853, the outer spline 854 and the spline hole 855, and the locking protrusion 856 and the locking groove 857, the positions of the connecting shaft 7, the first connecting sleeve 4, the limiting sleeve 82 and the first abutment 84 are relatively fixed.

[0027] The limiting cap 852 is axially limited at the end of the quadrangular hole 851. The cooperation between the quadrangular prism 853 and the quadrangular hole 851 fixes the relative position of the connecting shaft 7 and the first connecting sleeve 4 during the flipping of the display mounting plate 1. The locking protrusion 856 is stuck in the inner wall of the locking groove 857 to ensure that the connecting shaft 7 and the limiting sleeve 82 are relatively fixed. At the same time, the external spline 854 cooperates with the spline hole 855 to fix the relative position of the connecting shaft 7 and the first abutment 84, avoiding relative misalignment during the rotation and adjustment of the display screen, and ensuring the rotational stability of the entire shaft connection structure 85.

[0028] Furthermore, the follower connection structure 86 includes a first limiting groove 861 and a limiting protrusion 862. The first limiting groove 861 is disposed on the upper and lower sides of the inner wall of the second connecting sleeve 6; the limiting protrusion 862 is disposed on the upper and lower sides of the outer wall of the follower sleeve 83 and is connected to the inner wall of the first limiting groove 861. The cooperation between the first limiting groove 861 and the limiting protrusion 862 ensures that the positions of the follower sleeve 83 and the second connecting sleeve 6 are relatively fixed. When the display mounting plate 1 is tilted, the follower sleeve 83 can rotate synchronously with the second connecting sleeve 6 along the connecting shaft 7.

[0029] When the second connecting sleeve 6 rotates with the display mounting plate 1, it can drive the follower sleeve 83 to rotate together. The follower sleeve 83 only rotates relative to the limiting sleeve 82 and the first abutment seat 84, and will not drive the connecting shaft 7 to be misaligned synchronously, thus ensuring the stability of the rotation process.

[0030] Furthermore, the angle limiting component 9 includes a second limiting groove 91, a limiting block 92, a second abutment 93, an angle self-locking structure 94, a abutment component 95, and a closing damping structure 96. The second limiting groove 91 is disposed on both sides of the end of the limiting sleeve 82 near the follower sleeve 83; the limiting block 92 is disposed on the upper and lower sides of the end of the follower sleeve 83 near the limiting sleeve 83, and is fitted to the inner wall of the second limiting groove 91; the second abutment 93 is disposed on the side of the first abutment 84 away from the follower sleeve 83, and its inner wall is fitted to the outer wall of the outer spline 854; the angle self-locking structure 94 is disposed between the follower sleeve 83 and the first abutment 85. 4. The sides that are close to each other; the clamping component 95 is disposed on the side that is close to each other of the first clamping seat 84 and the second clamping seat 93; the retraction damping structure 96 is disposed on the side of the second clamping seat 93 away from the first clamping seat 84; wherein, by the movement of the limiting block 92 inside the second limiting groove 91, the rotation angle range of the follower sleeve 83 is limited, and the position of the vehicle display screen is fixed in multiple adjustment angles and retracted states by the angle self-locking structure 94; the clamping component 95 keeps the first clamping seat 84 and the follower sleeve 83 axially pressed together; and the retraction damping structure 96 provides buffer damping when the vehicle display screen rotates to the retracted position.

[0031] The limiting block 92 slides inside the second limiting groove 91. The maximum rotation range of the follower sleeve 83 is determined by the curvature of the second limiting groove 91, allowing the display mounting plate 1 to be adjusted from 0 to 95 degrees of pitch angle, thus avoiding structural damage caused by excessive rotation angle. The second abutment 93 also maintains its relative position with the connecting shaft 7 by cooperating with the external spline 854 through the spline hole 855. The angle self-locking structure 94 self-locks after the display rotates to the target adjustment angle or the retracted position. The abutment component 95 can always keep the first abutment 84 and the follower sleeve 83 in close contact, ensuring that the angle self-locking structure 94 is always in an effective working state and avoiding positioning loosening due to wear. At the same time, when the display is fully retracted, the retraction damping structure 96 can provide additional retraction damping, reduce the retraction impact force, and avoid damage to the screen and housing structure from hard collisions.

[0032] Furthermore, the angle self-locking structure 94 includes a ball bearing 941, an arc-shaped track groove 942, and a positioning groove 943. Two balls bearing 941 are provided, each located on the side of the follower sleeve 83 near the first abutment seat 84. Two arc-shaped track grooves 942 are provided, each located on the side of the first abutment seat 84 near the follower sleeve 83, and are connected to the outer wall of the balls bearing 941. Several positioning grooves 943 are provided, evenly distributed along the extension direction of the arc-shaped track grooves 942, and are all connected to the outer wall of the balls bearing 941. When the follower sleeve 83 rotates relative to the first abutment seat 84, the balls bearing 941 roll along the arc-shaped track grooves 942. When the vehicle display screen rotates to any adjustment angle or retracted state, the balls bearing 941 are engaged in the corresponding positioning grooves 943, achieving self-locking fixation at the corresponding rotation angle.

[0033] When the follower sleeve 83 rotates relative to the first abutment seat 84, the ball 941 rolls along the arc-shaped track groove 942. When the display screen rotates to the target adjustment angle or the fully retracted state, the ball 941 will be locked into the corresponding positioning groove 943 to achieve self-locking fixation of the rotation angle. The ball 941 can be moved out of the positioning groove 943 with slight force, which is convenient for passengers to perform angle adjustment operations. Compared with the traditional cam-type positioning structure, the rolling friction has less wear after long-term use and is less likely to cause positioning loosening due to wear, which is suitable for the use scenario of vehicle driving bumpy.

[0034] Furthermore, the clamping assembly 95 includes a disc spring 951, a muffler 952, a threaded fixing end 953, a threaded sleeve 954, and a clamping nut 955. The disc spring 951 is sleeved on the outer wall of the connecting shaft 7 and located on the side where the first clamping seat 84 and the second clamping seat 93 are close to each other; the muffler 952 is sleeved on the outer wall of the connecting shaft 7 and located at both ends of the disc spring 951, and respectively clamps against the first clamping seat 84 and the second clamping seat 93; the threaded fixing end 953 is located at the end of the connecting shaft 7 away from the limiting cap 852; the threaded sleeve 954... The threaded connection is to the outer wall of the threaded fixed end 953 and abuts against the end of the second abutment 93 away from the disc spring 951; the abutment nut 955 is threaded to the outer wall of the threaded fixed end 953 and abuts against the end of the threaded sleeve 954 away from the second abutment 93; wherein, by tightening the threaded sleeve 954 and the abutment nut 955, the disc spring 951 is compressed to produce elastic deformation, and the first abutment 84 is pushed to compress the follower sleeve 83, so that the follower sleeve 83 is kept in stable axial abutment with the first abutment 84 and the limiting sleeve 82.

[0035] Tightening the threaded sleeve 954 causes the disc spring 951 to elastically deform, which in turn pushes the first abutment 84 against the follower sleeve 83, ensuring that the follower sleeve 83 remains tightly fitted with the first abutment 84 and the limiting sleeve 82. The abutment nut 955 is used to tighten the threaded sleeve 954 to prevent loosening during long-term use. The noise-dampening plate 952 can eliminate the abnormal noise generated by the disc spring 951 contacting the metal parts during compression, improving the quietness during use. At the same time, the stable preload can offset the gaps caused by wear of parts, maintaining the stability of the shaft rotation even after long-term use. When wear occurs between parts, the preload can be readjusted by adjusting the tightening depth of the threaded sleeve 954, without replacing the entire shaft, thus reducing maintenance costs.

[0036] Furthermore, the retraction damping structure 96 includes a first fixing hole 961, a second fixing hole 962, and a torsion spring 963. The first fixing hole 961 is opened on the outer wall of the second abutment 93 away from the first abutment 84. The second fixing hole 962 is opened on the inner wall of the second connecting sleeve 6 away from the first connecting sleeve 4. The torsion spring 963 is sleeved on the outside of the threaded sleeve 954, and its two ends are respectively engaged with the inner walls of the first fixing hole 961 and the second fixing hole 962. When the vehicle display screen is rotated to the retracted state, the torsion spring 963 is twisted to the pre-tightened position, providing retraction buffer damping through its own torque to prevent the display screen from being bumped when retracted, while improving the operation quality of angle adjustment.

[0037] The two ends of the torsion spring 963 are respectively engaged in the first fixing hole 961 and the second fixing hole 962. Since the second abutment 93 and the connecting shaft 7 are relatively fixed, the second connecting sleeve 6 rotates synchronously with the follower sleeve 83. Therefore, when the display screen rotates to a certain angle in the retracting direction, the torsion spring 963 will be gradually twisted and stored. When the display screen is close to the fully retracted state, the torque of the torsion spring 963 will form a reverse resistance, providing additional retracting damping. During the unfolding and adjustment process of the display screen, the torque of the torsion spring 963 is small, which will not increase the resistance to unfolding, will not cause additional burden on the passenger's normal adjustment operation, and will not cause the ball 941 to disengage from the positioning groove 943.

[0038] Furthermore, a dustproof structure 10 is provided at the ends of the first connecting sleeve 4 and the second connecting sleeve 6 that are far apart from each other. The dustproof structure 10 includes a slot 101 and a cover 102. Two sets of slots 101 are provided, which are respectively opened on the inner walls of the ends of the first connecting sleeve 4 and the second connecting sleeve 6 that are far apart from each other. Two covers 102 are provided, which are respectively fitted and connected to the inner walls of the ends of the first connecting sleeve 4 and the second connecting sleeve 6 that are far apart from each other, and are also fitted and connected to the inner wall of the slot 101. The cover 102 seals the ends of the first connecting sleeve 4 and the second connecting sleeve 6 to prevent dust and vehicle debris from entering the mating gap inside the shaft, so as to avoid the accumulation of impurities and the resulting rotational jamming.

[0039] The invention will be further explained below in conjunction with its working principle: In the initial assembly state, the connecting shaft 7 is relatively fixed to the first connecting sleeve 4 through the cooperation of the quadrangular hole 851, the quadrangular prism 853 and the limiting cap 852. At the same time, the locking protrusion 856 and the locking groove 857, and the external spline 854 and the spline hole 855, keep the limiting sleeve 82, the first abutment 84 and the second abutment 93 relatively fixed to the connecting shaft 7. The follower sleeve 83 is relatively fixed to the second connecting sleeve 6 through the cooperation of the first limiting groove 861 and the limiting protrusion 862. After tightening the threaded sleeve 954, the disc spring 951 is compressed to obtain a stable preload force. Then, the position is locked by the abutment nut 955, so that all mating end faces always keep in close contact. When the rear passenger adjusts the screen angle, causing the screen mounting plate 1 to flip relative to the seat back base 2, the screen mounting plate 1 will drive the second connecting sleeve 6 and the follower sleeve 83 to rotate synchronously. The follower sleeve 83 rotates relative to the limiting sleeve 82 and the first abutment 84, and the ball bearing 941 rolls along the arc-shaped track groove 942 on the first abutment 84. When the target viewing angle is reached, the ball bearing 941 is engaged in the positioning groove 943 at the corresponding position, completing the self-locking fixation of that angle. At the same time, the limiting block 92 can limit the rotation range at the extreme position of the second limiting groove 91. When the passenger closes the display screen, the follower sleeve 83 rotates in the opposite direction, and the ball 941 rolls along the arc-shaped track groove 942 toward the closing side; when it rotates to a position close to the fully closed position, the torsion spring 963 is gradually twisted to store energy, generating reverse damping and slowing down the closing speed; when the ball 941 is engaged in the positioning groove 943 on the closing side, the closing self-locking is completed. After long-term use, if slight wear occurs on the mating end faces of the parts, the preload can be adjusted by directly tightening the threaded sleeve 954 to offset the wear gap. There is no need to replace the rotating shaft, and the rotational stability can be maintained. The wear during the rotation process is mainly concentrated on the end faces of the limiting sleeve 82 and the follower sleeve 83, and will not damage the core connecting shaft 7 and the connecting sleeve, effectively extending the overall service life of the vehicle display screen connecting shaft.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-directional angle-adjustable rear-seat in-vehicle display screen, comprising a display screen mounting plate (1), characterized in that, A seat back base (2) is provided on one side of the back of the display mounting plate (1). Both ends of the seat back base (2) near the display mounting plate (1) are fixedly connected to a backrest side fixing plate (3). A first connecting sleeve (4) is provided on the side of the backrest side fixing plate (3) near the display mounting plate (1). Display side fixing plates (5) are fixedly connected to both sides of the back of the display mounting plate (1). A second connecting sleeve (6) is provided on the side of the display side fixing plate (5) near the seat back base (2). A connecting shaft (7) is provided inside the first connecting sleeve (4) and the second connecting sleeve (6). The multi-directional angle adjustable rear-seat vehicle display screen also includes: A shaft connection assembly (8) is disposed on the outer wall of the connecting shaft (7); Angle limiting component (9) is located inside the second connecting sleeve (6) on the outside of the connecting shaft (7); The connecting shaft (7) is connected to the first connecting sleeve (4) and the second connecting sleeve (6) through the shaft connecting assembly (8), so that the second connecting sleeve (6) can rotate relative to the first connecting sleeve (4) to realize the multi-level tilt angle adjustment of the display screen mounting plate (1) relative to the seat back base (2). The angle limiting assembly (9) locks and fixes the angle of the connecting shaft (7) after rotation adjustment.

2. The multi-directional angle-adjustable rear-seat in-vehicle display screen according to claim 1, characterized in that, The shaft connection assembly (8) includes: The first gasket (81) is sleeved on the outer wall of the connecting shaft (7) and is connected to the inner wall of the first connecting sleeve (4); The limiting sleeve (82) is sleeved on the outer wall of the connecting shaft (7) on the side of the first gasket (81) near the second connecting sleeve (6), and is connected to the inner wall of the first connecting sleeve (4) and the second connecting sleeve (6); The follower sleeve (83) is connected to the side of the limiting sleeve (82) away from the first gasket (81), and its inner wall gap is fitted to the outer wall of the connecting shaft (7), and its outer wall is connected to the inner wall of the second connecting sleeve (6); The first abutment (84) is located on the side of the follower sleeve (83) away from the limiting sleeve (82), and its outer wall gap fits the inner wall of the second connecting sleeve (6); A shaft connection structure (85) is provided on the outer wall of the connecting shaft (7); A follower connection structure (86) is disposed on the outer wall of the follower sleeve (83); The connecting shaft (7) is relatively fixed in position with the first connecting sleeve (4), the limiting sleeve (82) and the first abutment (84) through the shaft connecting structure (85). The follower sleeve (83) is relatively fixed in position with the second connecting sleeve (6) through the follower connecting structure (86). When the display screen mounting plate (1) is tilted relative to the seat back base (2), the second connecting sleeve (6) drives the follower sleeve (83) to rotate along the outer wall of the connecting shaft (7) and rotate relative to the limiting sleeve (82) and the first abutment (84).

3. The multi-directional angle adjustable rear-seat in-vehicle display screen according to claim 2, characterized in that, The shaft connection structure (85) includes: A quadrangular hole (851) is provided on the inner wall of the first connecting sleeve (4) on the side away from the second connecting sleeve (6); The limiting cap (852) is located at the end of the connecting shaft (7) away from the second connecting sleeve (6) and is connected to the inner wall of the first connecting sleeve (4); The quadrangular prism (853) is located on the outer wall of the connecting shaft (7) on the side of the limiting cap (852) near the second connecting sleeve (6), and is connected to the inner wall of the quadrangular hole (851). An external spline (854) is provided on the outer wall of the connecting shaft (7); The spline hole (855) is provided on the inner wall of the first abutment (84) and is connected to the outer wall of the outer spline (854); Locking protrusions (856) are provided on both sides of the outer wall of the connecting shaft (7); Locking grooves (857) are provided on both sides of the outer wall of the limiting sleeve (82) and are connected to the outer wall of the locking protrusion (856); The four-sided hole (851) and the four-sided prism (853), the external spline (854) and the spline hole (855), and the locking protrusion (856) and the locking groove (857) work together to ensure that the positions of the connecting shaft (7) and the first connecting sleeve (4), the limiting sleeve (82) and the first abutment (84) are relatively fixed.

4. A multi-directional angle-adjustable rear-seat in-vehicle display screen according to claim 3, characterized in that, The follower connection structure (86) includes: The first limiting groove (861) is provided on the upper and lower sides of the inner wall of the second connecting sleeve (6); The limiting protrusion (862) is provided on the upper and lower sides of the outer wall of the follower sleeve (83) and is connected to the inner wall of the first limiting groove (861); The first limiting groove (861) and the limiting protrusion (862) work together to ensure that the positions of the follower sleeve (83) and the second connecting sleeve (6) are relatively fixed. When the display screen mounting plate (1) is adjusted for pitch angle, the follower sleeve (83) can follow the second connecting sleeve (6) to rotate synchronously along the connecting shaft (7).

5. A multi-directional angle-adjustable rear-seat in-vehicle display screen according to claim 4, characterized in that, The angle limiting component (9) includes: The second limiting groove (91) is provided on both sides of the end of the limiting sleeve (82) near the follower sleeve (83); The limiting block (92) is set on the upper and lower sides of the end of the follower sleeve (83) near the limiting sleeve (82), and is connected to the inner wall of the second limiting groove (91); The second abutment (93) is located on the side of the first abutment (84) away from the follower sleeve (83), and its inner wall is fitted to the outer wall of the outer spline (854); An angle self-locking structure (94) is provided on the side where the follower sleeve (83) and the first abutment (84) are close to each other; The clamping component (95) is disposed on the side where the first clamping seat (84) and the second clamping seat (93) are close to each other; A retractable damping structure (96) is provided on the side of the second abutment (93) away from the first abutment (84); The movement of the limiting block (92) inside the second limiting groove (91) limits the rotation angle range of the follower sleeve (83). At the same time, the angle self-locking structure (94) fixes the position of the vehicle display screen in multiple adjustment angles and retracted states. The clamping component (95) keeps the first clamping seat (84) and the follower sleeve (83) axially clamped. The retracting damping structure (96) provides buffer damping when the vehicle display screen rotates to the retracted position.

6. A multi-directional angle-adjustable rear-seat in-vehicle display screen according to claim 5, characterized in that, The angle self-locking structure (94) includes: There are two ball bearings (941), which are respectively located on the side of the follower sleeve (83) near the first abutment (84); Two arc-shaped track grooves (942) are provided, which are respectively opened on the side of the first abutment (84) near the follower sleeve (83) and are connected to the outer wall of the ball (941); The positioning groove (943) is provided in several ways, and is evenly distributed along the extension direction of the arc-shaped track groove (942), and is connected to the outer wall of the ball (941). When the follower sleeve (83) rotates relative to the first abutment (84), the ball (941) rolls along the arc-shaped track groove (942). When the vehicle display screen rotates to any adjustment angle or retracted state, the ball (941) is locked into the positioning groove (943) at the corresponding position to achieve self-locking fixation of the corresponding rotation angle.

7. A multi-directional angle-adjustable rear-seat in-vehicle display screen according to claim 6, characterized in that, The clamping assembly (95) includes: The disc spring (951) is sleeved on the outer wall of the connecting shaft (7) on the side where the first abutment (84) and the second abutment (93) are close to each other; The sound-absorbing plate (952) is sleeved on the outer wall of the connecting shaft (7) at both ends of the disc spring (951) and abuts against the first abutment (84) and the second abutment (93) respectively. The threaded fixing end (953) is located at the end of the connecting shaft (7) away from the limiting cap (852); A threaded sleeve (954) is threaded to the outer wall of the threaded fixed end (953) and abuts against the end of the second abutment (93) away from the disc spring (951); The clamping nut (955) is threaded to the outer wall of the threaded fixed end (953) and abuts against the end of the threaded sleeve (954) away from the second clamping seat (93); In this process, by tightening the threaded sleeve (954) and the abutment nut (955), the disc spring (951) is compressed to generate elastic deformation, and the first abutment seat (84) is pushed to compress the follower sleeve (83), so that the follower sleeve (83) is kept in stable axial abutment with the first abutment seat (84) and the limiting sleeve (82).

8. A multi-directional angle-adjustable rear-seat vehicle display screen according to claim 7, characterized in that, The retraction damping structure (96) includes: The first fixing hole (961) is opened on the outer wall of the second abutment (93) at the end away from the first abutment (84); The second fixing hole (962) is opened on the inner wall of the end of the second connecting sleeve (6) away from the first connecting sleeve (4); A torsion spring (963) is sleeved on the outside of a threaded sleeve (954), and its two ends are respectively engaged with the inner walls of the first fixing hole (961) and the second fixing hole (962); When the vehicle display screen is rotated to the retracted state, the torsion spring (963) is twisted to the pre-tightened position, and provides retraction buffer damping through its own torque to prevent the display screen from being bumped when it is retracted, while improving the operation quality of angle adjustment.

9. A multi-directional angle-adjustable rear-seat vehicle display screen according to claim 8, characterized in that, A dustproof structure (10) is provided at one end of the first connecting sleeve (4) and the second connecting sleeve (6) that are far apart from each other. The dustproof structure (10) includes: The card slot (101) is provided in two sets, which are respectively opened on the inner wall of the opposite ends of the first connecting sleeve (4) and the second connecting sleeve (6); There are two shielding covers (102), which are respectively connected to the inner walls of the opposite ends of the first connecting sleeve (4) and the second connecting sleeve (6), and are also connected to the inner wall of the slot (101).

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