A flip mechanism for a display screen

Abstract

The application discloses a turnover mechanism for a display screen and belongs to the technical field of display devices.The device comprises a flat shaft, two shaft sleeves and a gear sleeve, the two shaft sleeves are sleeved on the flat shaft, the two shaft sleeves are located on the two sides of the gear sleeve, the peripheral surface of the shaft sleeve is provided with J-shaped lines, the end surface away from the lines is provided with a limiting tooth, the gear sleeve is provided with a driving block matched with the lines, the bottom end of the lines of one shaft sleeve is oppositely arranged with the bottom end of the lines of the other shaft sleeve, the driving block is moved along the lines through the rotation of the gear sleeve, so that the two shaft sleeves are moved to each other along the axis of the flat shaft, and then the limiting tooth is changed from the locked state to the unlocked state, the flat shaft is driven to rotate when the gear sleeve continues to rotate, and the effect of adjusting the angle of the display device is achieved, and the problems that the existing turnover mechanism cannot be adjusted at a large angle due to the large space occupancy rate, the adjusting process is prone to jamming, and the display device cannot be ensured to be stable after being adjusted to the position are effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of display device technology, and specifically relates to a flipping mechanism for a display screen. Background Technology

[0002] With the development of technology, the automation transformation of various devices is gradually increasing. Among them, displays, as a common signal transmission device, require users to manually adjust them to a suitable angle to achieve the best visual effect. However, this adjustment method is cumbersome. To solve this problem, Chinese invention patent CN105972400A discloses a flip-up display screen, including a mounting base, a display screen, and a flipping mechanism. The flipping mechanism includes a pushing component and a positioning component. The pushing component includes a reciprocating drive component, a pushing component, and at least one linkage component. The reciprocating drive component is connected to the linkage component through the pushing component. All linkage components are slidably connected to the mounting base and hinged to the same side edge of the display screen to form a pushing edge. The positioning component includes a mechanical push rod and an electric positioning group for positioning the display screen. Two adjacent edges of the pushing edge are hinged to the mechanical push rod to form a hinged edge. The other end of the mechanical push rod relative to the display screen is hinged to the mounting base. This display screen allows users to view the content stably and conveniently, with no blind spots, effectively ensuring that viewers can view the display screen normally.

[0003] However, in actual use, it was found that this flip-up display still has shortcomings:

[0004] 1) The display screen needs to slide between the slider and the rail to open and close. In order to achieve a larger opening angle, a rail of a certain length is required, which will significantly increase the space occupied by the display screen.

[0005] 2) Since there are slide rails and sliders on both sides of the display screen, there is a situation where the sliders on both sides move asynchronously. This situation will cause movement interference, which will damage the slide rails and sliders, and thus affect the customer's viewing experience and usage effect.

[0006] Therefore, it is necessary to design a display screen flipping mechanism that can both achieve automatic screen flipping and ensure the reliability of the flipping. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a display screen flipping mechanism that can both realize automatic screen flipping and ensure the reliability of the flipping.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a flipping mechanism for a display screen, comprising a flat shaft and two bushings and a gear sleeve sleeved on the flat shaft; the two bushings are located on both sides of the gear sleeve; the circumferential surface of the bushing is provided with a J-shaped pattern, and the end face away from the pattern is provided with a limiting tooth; the gear sleeve is provided with a driving block that fits with the pattern; the bottom end of the pattern of one bushing is arranged opposite to the bottom end of the pattern of the other bushing.

[0009] The beneficial effects of the present invention are as follows: The flipping mechanism for the display screen provided by the present invention has a compact structure and simple operation. By rotating the gear sleeve, the drive block moves along the texture, thereby moving the two bushings along the axis of the flat shaft into the gear sleeve, and thus changing the limiting tooth from the locked state to the unlocked state; when the gear sleeve continues to rotate, it can drive the flat shaft to rotate, thereby achieving the effect of adjusting the angle of the display device. Attached Figure Description

[0010] Figure 1 The diagram shown is a schematic representation of the structure of the flip mechanism for the display screen in cooperation with the display screen according to a specific embodiment of the present invention.

[0011] Figure 2 The diagram shown is a schematic diagram of the structure of the flip mechanism (top cover omitted) for the display screen in conjunction with the display screen according to a specific embodiment of the present invention.

[0012] Figure 3 The figure shown is a top view of the flat shaft, first bushing, gear sleeve, second bushing, first locking sleeve and second locking sleeve according to a specific embodiment of the present invention.

[0013] Figure 4 The figure shown is a top view of the flat shaft, first bushing, second bushing, first elastic element, second elastic element, first locking sleeve and second locking sleeve according to a specific embodiment of the present invention.

[0014] Figure 5 The diagram shown is a structural schematic of the first bushing according to a specific embodiment of the present invention;

[0015] Figure 6 The image shown is a left view of the first bushing according to a specific embodiment of the present invention;

[0016] Figure 7 The diagram shown is a structural schematic of the gear sleeve according to a specific embodiment of the present invention;

[0017] Figure 8 The diagram shown is a structural schematic of the first locking sleeve according to a specific embodiment of the present invention;

[0018] Figure 9 The image shown is a front sectional view of the second gear set according to a specific embodiment of the present invention;

[0019] Figure 10 As shown Figure 3 A magnified view of point A;

[0020] Figure 11 As shown Figure 5 A magnified view of point B;

[0021] Label Explanation:

[0022] 1. Flat shaft;

[0023] 2. First bushing; 21. Texture; 211. First drive section; 212. First unlocking section; 213. Locking section; 214. Second unlocking section; 215. Second drive section; 22. Limiting tooth; 23. Flat hole; 24. Lifting angle;

[0024] 3. Gear sleeve; 31. Drive block; 32. First drive unit; 33. Gear unit; 331. Limiting plate; 332. First circular hole; 34. Second drive unit;

[0025] 4. Second bushing; 5. First elastic element; 6. Second elastic element;

[0026] 7. First locking sleeve; 71. First limiting section; 711. Limiting surface; 72. Second limiting section; 721. Positioning tooth; 73. Second circular hole;

[0027] 8. Second locking sleeve; 9. Upper end cover;

[0028] 10. Lower end cover; 101. Limiting part;

[0029] 11. Motor drive device; 111. First worm gear;

[0030] 12. First gear set; 121. First gear; 122. Second worm gear;

[0031] 13. Second gear set; 131. Shaft; 1311. Shoulder; 132. Second gear; 133. Third gear; 134. Third elastic element; 135. Friction plate;

[0032] 14. External signal interface; 15. Circuit board; 16. Display screen; 17. Connecting bracket; 18. Fastening device; 19. Bottom corner. Detailed Implementation

[0033] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0034] The most crucial concept of this invention lies in the fact that the rotation of the gear sleeve causes the drive block to move along the texture, thereby moving the first and second bushings along the axis of the flat shaft into the gear sleeve, thus changing the limiting tooth from a locked state to an unlocked state; when the gear sleeve continues to rotate, it can drive the flat shaft to rotate, thereby achieving the effect of adjusting the angle of the display device.

[0035] Please refer to Figures 1 to 9 The present invention provides a flipping mechanism for a display screen, comprising a flat shaft 1 and a first bushing 2 and a gear sleeve 3 sequentially sleeved on the flat shaft 1, and a second bushing 4 having the same structure as the first bushing 2; the first bushing 2 has a J-shaped texture 21 on its circumferential surface, and a limiting tooth 22 is provided on the end face away from the texture 21; the gear sleeve 3 has a driving block 31 that fits into the texture 21; the bottom end of the texture 21 of the first bushing 2 is arranged opposite to the bottom end of the texture 21 of the second bushing 4.

[0036] As can be seen from the above description, the beneficial effects of the present invention are as follows: It provides a flipping mechanism for a display screen. By rotating the gear sleeve 3, the drive block 31 moves along the texture, thereby moving the first bushing 2 and the second bushing 4 along the axis of the flat shaft 1 into the gear sleeve 3, and thus changing the limiting tooth 22 from the locked state to the unlocked state; when the gear sleeve 3 continues to rotate, it can drive the flat shaft 1 to rotate, thereby achieving the effect of adjusting the angle of the display device; the device has a compact structure and is easy to operate. Compared with the existing flipping mechanism, it has a small space occupation rate and can achieve a large angle adjustment. Moreover, the adjustment process is smooth, and the stability of the display device can be guaranteed after the adjustment is in place.

[0037] Furthermore, the two ends of the flat shaft 1 are provided with connecting brackets 17 and fastening devices 18; the two ends of the flat shaft 1 are respectively connected to the connecting brackets 17 through the fastening devices 18. The two ends of the flat shaft 1 can also be connected to the connecting brackets 17 by welding.

[0038] As can be seen from the above description, the connecting bracket 17 can be used to fix any display device; the fastening device 18 can restrict the connecting bracket 17 on the flat shaft 1 to prevent the connecting bracket 17 from falling off the flat shaft 1.

[0039] Furthermore, the texture 21 includes a first driving segment 211, a first unlocking segment 212, a locking segment 213, a second unlocking segment 214, and a second driving segment 215 connected in sequence; the axes of the first driving segment 211 and the second driving segment 215 are both parallel to the axis of the flat shaft 1; the plane where the locking segment 213 is located is perpendicular to the axis of the flat shaft 1; the distance between the highest point of the first unlocking segment 212 and the lowest point of the locking segment 213 is greater than the length of the full tooth height of the limiting tooth 22; the distance between the highest point of the second unlocking segment 214 and the lowest point of the locking segment 213 is greater than the length of the full tooth height of the limiting tooth 22.

[0040] As can be seen from the above description, this design enables the first bushing 2 and the second bushing 4 to have accurate locking, unlocking and driving stages, thereby indirectly improving the adjustment accuracy of the gear sleeve 3 and avoiding interference caused by asynchronous state transitions of the first bushing 2 and the second bushing 4.

[0041] Furthermore, the gear sleeve 3 includes a first driving part 32, a gear part 33, and a second driving part 34 connected in sequence; the first driving part 32 and the second driving part 34 are provided with driving blocks 31; the gear part 33 includes a limiting plate 331; the limiting plate 331 is provided with a first circular hole 332 with a diameter greater than the maximum shaft diameter of the flat shaft 1.

[0042] Furthermore, the aforementioned flipping mechanism also includes a first elastic element 5 and a second elastic element 6 sleeved with the flat shaft 1; one end of the first elastic element 5 is located inside the first bushing 2 and abuts against the inner end face of the first bushing 2 with the limiting tooth 22, and the other end is located inside the first drive part 32 and abuts against the limiting plate 331; one end of the second elastic element 6 is located inside the second bushing 4 and abuts against the inner end face of the second bushing 4 with the limiting tooth 22, and the other end is located inside the second drive part 34 and abuts against the limiting plate 331.

[0043] As can be seen from the above description, when the gear sleeve 3 drives the first bushing 2 and the second bushing 4 to move relative to each other, the first elastic element 5 and the second elastic element 6 are in a compressed state. After the adjustment work is finished, the gear sleeve 3 is driven in the opposite direction, and the first bushing 2 and the second bushing 4 can move in opposite directions under the drive of the first elastic element 5 and the second elastic element 6, respectively, so as to return to the locked state, thereby ensuring that the display device is stably fixed in the designated position. In addition, the limiting plate 331 is provided with a first circular hole 332 with a diameter larger than the maximum shaft diameter of the flat shaft 1, so as to ensure that the gear sleeve 3 can rotate independently when unlocked, avoiding interference with the flat shaft 1 and affecting the adjustment work.

[0044] Furthermore, on the end face of the first bushing 2 where the limiting tooth 22 is provided, there is a flat hole 23 with a shape consistent with the outer contour of the flat shaft 1.

[0045] As can be seen from the above description, this design allows the first bushing 2 to move only along the axis of the flat shaft 1 when unlocked. Only when fully unlocked can the first bushing 2 drive the flat shaft 1 to rotate, thereby realizing the automatic adjustment function of the display device.

[0046] Furthermore, the aforementioned flipping mechanism also includes a first locking sleeve 7 and a second locking sleeve 8 with identical structures; the first locking sleeve 7 includes a first limiting segment 71 and a second limiting segment 72 connected in sequence; the first limiting segment 71 includes two mutually parallel limiting surfaces 711; the second limiting segment 72 is provided with positioning teeth 721; the positioning teeth 721 mesh with the limiting teeth 72; the first locking sleeve 7 is also provided with a second circular hole 73 that penetrates the first limiting segment 71 and the second limiting segment 72 and has a diameter greater than the maximum shaft diameter of the flat shaft 1; the second circular hole 73 is coaxially arranged with the flat shaft 1.

[0047] Furthermore, the aforementioned flipping mechanism also includes an upper end cover 9 and a lower end cover 10 constituting the storage space; the end cover is provided with a limiting part 101 whose shape is consistent with the outer contour of the first limiting segment 71.

[0048] Furthermore, the bottom angle 19 of the positioning tooth 721 and the limiting tooth 22 is less than 90°; the lifting angle 24 of the first unlocking section 212 and the second unlocking section 214 is less than 90°.

[0049] As can be seen from the above description, the meshing between the positioning tooth 721 and the limiting tooth 22, and the limiting action between the limiting surface 711 on the first limiting section 71 and the limiting part 101 of the lower end cover 10, ensure that the display device remains stable in the locked state. Furthermore, ensuring that the bottom angle 19 of the positioning tooth 721 and the limiting tooth 22 is less than 90° not only gives the flipping mechanism a certain self-locking performance but also prevents damage to the internal structure caused by manual misoperation of the flat shaft 1. Since the lifting angle 24 of the first unlocking section 212 and the second unlocking section 214 is less than 90°, the gear sleeve 3 can easily achieve automatic adjustment. Moreover, the provision of a second circular hole 73 with a diameter larger than the maximum shaft diameter of the flat shaft 1 prevents interference between the flat shaft 1 and the first locking sleeve 7 during rotation, thus avoiding affecting the adjustment of the display device.

[0050] Furthermore, the upper end cover 9 and the lower end cover 10 also include a motor drive device 11, a first gear set 12 and a second gear set 13 connected in sequence; the movable end of the motor drive device 11 is provided with a first worm gear 111; the first gear set 12 includes a first gear 121 and a second worm gear 122 arranged coaxially; the first worm gear 111 is connected to the first gear 121 in a transmission connection; the second worm gear 122 is connected to the second gear set 13 in a transmission connection.

[0051] Furthermore, the second gear set 13 includes a rotating shaft 131, and a second gear 132 and a third gear 133 sleeved with the rotating shaft 131; the rotating shaft 131 is provided with a shoulder 1311; the second gear 132 is located between the first gear 121 and the shoulder 1311; a third elastic element 134 is provided inside the second gear 132; one end of the third elastic element 134 abuts against the second gear 132, and the other end abuts against the shoulder 1311; a friction plate 135 is provided between the second gear 132 and the third gear 133.

[0052] As described above, the third elastic element 134 can push the second gear 132 toward the third gear 133, thereby causing the second gear 132 and the third gear 133 to press against the friction plate 135, thus achieving synchronous rotation of the second gear 132 and the third gear 133. When manual misoperation occurs and the externally applied force is greater than the friction between the second gear 132 and the third gear 133, the third gear 133 can rotate relative to the second gear 132, thereby avoiding damage to internal components due to manual misoperation.

[0053] Furthermore, an external signal interface 14 and a circuit board 15 are electrically connected between the upper end cover 9 and the lower end cover 10; the circuit board 15 is electrically connected to the motor drive device 11.

[0054] As can be seen from the above description, when the external signal interface 14 receives an adjustment signal, the circuit board 15 can convert the adjustment signal into an electrical signal and send it to the motor drive device 11, thereby realizing the adjustment function of the display device.

[0055] Furthermore, the lower end cover 10 is provided with a limiting groove at the position for placing the gear sleeve 3; the gear part 33 is located in the limiting groove.

[0056] As can be seen from the above description, this design can restrict the movement of the gear sleeve 3 along the axial direction of the flat shaft 1, thereby providing a basic guarantee for the gear sleeve 3 to drive the first shaft sleeve 2 and the second shaft sleeve 4 to move along the axial direction of the flat shaft 1.

[0057] The flipping mechanism of the present invention can be used in various devices that require angle adjustment, and is especially suitable for the adjustment of display screens.

[0058] Embodiment 1 of the present invention is as follows:

[0059] Reference Figures 1 to 2A flipping mechanism for a display screen includes a first bushing 2, a gear sleeve 3, and a second bushing 4 with the same structure as the first bushing 2, which are sequentially sleeved on a flat shaft 1. The first bushing 2 has a J-shaped texture 21 on its circumferential surface and a limiting tooth 22 on its end face away from the texture 21. The gear sleeve 3 has a drive block 31 that fits into the texture 21. The bottom end of the texture 21 of the first bushing 2 is opposite to the bottom end of the texture 21 of the second bushing 4. The two ends of the flat shaft 1 are provided with connecting brackets 17 and fastening devices 18. The two connecting brackets 17 are located between the fastening devices 18.

[0060] Reference Figures 3 to 7 The texture 21 includes a first driving segment 211, a first unlocking segment 212, a locking segment 213, a second unlocking segment 214, and a second driving segment 215 connected in sequence; the axes of the first driving segment 211 and the second driving segment 215 are both parallel to the axis of the flat shaft 1; the plane where the locking segment 213 is located is perpendicular to the axis of the flat shaft 1; the distance between the highest point of the first unlocking segment 212 and the lowest point of the locking segment 213 is greater than the length of the full tooth height of the limiting tooth 22; the distance between the highest point of the second unlocking segment 214 and the lowest point of the locking segment 213 is greater than the length of the full tooth height of the limiting tooth 22.

[0061] The gear sleeve 3 includes a first drive part 32, a gear part 33, and a second drive part 34 connected in sequence; the gear part 33 includes a limiting plate 331; the limiting plate 331 is provided with a first circular hole 332 with a diameter greater than the maximum shaft diameter of the flat shaft 1.

[0062] It also includes a first elastic element 5 and a second elastic element 6 that are sleeved with the flat shaft 1; one end of the first elastic element 5 is located inside the first bushing 2 and abuts against the inner end face of the first bushing 2 with the limiting tooth 22, and the other end is located inside the first drive part 32 and abuts against the limiting plate 331; one end of the second elastic element 6 is located inside the second bushing 4 and abuts against the inner end face of the second bushing 4 with the limiting tooth 22, and the other end is located inside the second drive part 34 and abuts against the limiting plate 331; on the end face of the first bushing 2 with the limiting tooth 22, there is a flat hole 23 with a shape consistent with the outer contour of the flat shaft 1.

[0063] Reference Figure 8 It also includes a first locking sleeve 7 and a second locking sleeve 8 with the same structure; the first locking sleeve 7 includes a first limiting segment 71 and a second limiting segment 72 connected in sequence; the first limiting segment 71 includes two mutually parallel limiting surfaces 711; the second limiting segment 72 is provided with positioning teeth 721; the positioning teeth 721 and the limiting teeth 72 mesh with each other; the first locking sleeve 7 is also provided with a second circular hole 73 that penetrates the first limiting segment 71 and the second limiting segment 72 and has a diameter greater than the maximum shaft diameter of the flat shaft 1; the second circular hole 73 is coaxially arranged with the flat shaft 1.

[0064] Reference Figure 2and Figure 9 It also includes an upper end cover 9 and a lower end cover 10 constituting the storage space; the end cover is provided with a limiting part 101 whose shape is consistent with the outer contour of the first limiting section 71; the bottom angle 19 of the positioning tooth 721 and the limiting tooth 22 is 80°, and the lifting angle 24 of the first unlocking section 212 and the second unlocking section 214 is 45°; between the end cover 9 and the lower end cover 10, there is also a motor drive device 11, a first gear set 12 and a second gear set 13 connected in sequence; the movable end of the motor drive device 11 is provided with a first worm gear 111; the first gear set 12 includes a first gear 121 and a second worm gear 122 arranged coaxially; the first worm gear 121... 11 is connected to the first gear 121; the second worm gear 122 is connected to the second gear set 13; the second gear set 13 includes a rotating shaft 131, and a second gear 132 and a third gear 133 sleeved on the rotating shaft 131; the rotating shaft 131 is provided with a shoulder 1311; the second gear 132 is located between the first gear 121 and the shoulder 1311; a third elastic element 134 is provided inside the second gear 132; one end of the third elastic element 134 abuts against the second gear 132, and the other end abuts against the shoulder 1311; a friction plate 135 is provided between the second gear 132 and the third gear 133.

[0065] The upper end cover 9 and the lower end cover 10 also include an external signal interface 14 and a circuit board 15 that are electrically connected; the circuit board 15 is electrically connected to the motor drive device 11; the lower end cover 10 has a limiting groove (not shown in the figure) for placing the gear sleeve 3; the gear part 33 is located in the limiting groove.

[0066] The working principle of this invention is as follows:

[0067] When the external signal interface 14 receives a lifting signal from the display screen 16, the circuit board 15 converts the drive signal into an electrical signal and transmits it to the motor drive device 11 to make it run. The rotation of the first worm 111 drives the first gear 121 and the second worm 122 on the first gear set 12 to run. The second worm 122 then drives the second gear 132 on the second gear set 13 to run. Because the second gear 132 has a third elastic element 134 inside, the second gear 132 and the third gear 133 can press tightly against the friction plate 135 between them under the drive of the third elastic element 134, so that the second gear 132 and the third gear 133 can run synchronously, thereby driving the gear sleeve 3 to rotate. Then the drive block 31 of the gear sleeve 3 moves along the "locking section - first" of the groove 21. During the movement of the unlocking section 212—first driving section 211 (or "locking section—second unlocking section 214—second driving section 215"), the first bushing 2 and the second bushing 4 can move along the axis of the flat shaft 1 toward the gear sleeve 3, thereby causing the limiting tooth 22 to separate from the positioning tooth 721 on the first locking sleeve 7 and the second locking sleeve 8, thus changing the flipping mechanism from the locked state to the unlocked state; then further drive the gear sleeve 3 to rotate; because the first bushing 2 and the second bushing 4 are provided with flat holes 23 whose shape is consistent with the outer contour of the flat shaft 1, the flat shaft 1 can be driven to rotate through the point-to-point cooperation between the first bushing 2 and the second bushing 4 and the flat shaft 1 in the unlocked state, and because the connecting frame 17 is connected to the flat shaft 1, the lifting (lowering) operation of the display device can be realized. Once the designated position is reached, the reverse drive motor drive device 11 causes the drive block 31 to move along the trajectory of the texture 21: "first drive segment 211 - first unlock segment 212 - locking segment" (or "second drive segment 215 - second unlock segment 214 - locking segment"). Since the first bushing 2 and the second bushing 4 are respectively provided with the first elastic element 5 and the second elastic element 6, when the drive block 31 reaches the locking segment, the elastic force can push the first bushing 2 and the second bushing 4 to move in the opposite direction, so that the limiting tooth 22 and the positioning tooth 721 return to the meshing state. Since the first locking sleeve and the second locking sleeve 8 are provided with the limiting surface 711 that matches the lower end cover 10, the display device that has been adjusted to the position can be steadily fixed and prevented from shaking.

[0068] Because the angle of the tooth tips of the positioning tooth 721 and the limiting tooth 22 is greater than the lifting angle 24 of the first unlocking section 212 and the second unlocking section 214, and the externally applied force is greater than the frictional force between the second gear 132 and the third gear 133, damage to internal components caused by manual misoperation can be avoided.

[0069] Example 2:

[0070] The difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the second gear 132 and the third gear 133 of the second gear set 13 are integrally formed. The flipping mechanism of the second gear set 13 can only realize the automatic adjustment function. Because the second gear 132 and the third gear 133 of the second gear set 13 are integrally formed, the whole can generate a self-locking phenomenon with the first gear set when the gear sleeve is stationary, thereby ensuring that the angle of the flipping mechanism cannot be changed arbitrarily under the action of external force.

[0071] Example 3:

[0072] The difference between Embodiment 3 and Embodiment 1 is that in Embodiment 3, only one bushing is fitted on the flat shaft 1. This design can further facilitate the gear sleeve 3 to drive the bushing to perform unlocking and locking actions, and avoid affecting the overall angle adjustment work due to interference.

[0073] In summary, the present invention provides a flipping mechanism for a display screen, which has a compact overall structure and is easy to operate. By rotating the gear sleeve, the drive block moves along the texture, thereby moving the first and second bushings along the axis of the flat shaft into the gear sleeve, thus changing the limiting tooth from a locked state to an unlocked state. When the gear sleeve continues to rotate, it can drive the flat shaft to rotate, thereby achieving the effect of adjusting the angle of the display device. This overcomes the shortcomings of existing flipping mechanisms, which have large space occupancy and cannot adjust to large angles, and are prone to jamming during the adjustment process, and cannot guarantee the stability of the display device after adjustment.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A flipping mechanism for a display screen, characterized in that, It includes a flat shaft and two bushings and a gear sleeve fitted onto the flat shaft; the two bushings are located on both sides of the gear sleeve; the circumferential surface of the bushing is provided with a J-shaped pattern, and the end face away from the pattern is provided with a limiting tooth; the gear sleeve is provided with a driving block that fits into the pattern; the bottom end of the pattern of one bushing is arranged opposite to the bottom end of the pattern of the other bushing. The texture includes a first driving segment, a first unlocking segment, a locking segment, a second unlocking segment, and a second driving segment connected in sequence; the axes of the first driving segment and the second driving segment are both parallel to the axis of the flat shaft; the plane where the locking segment is located is perpendicular to the axis of the flat shaft; the distance between the highest point of the first unlocking segment and the lowest point of the locking segment is greater than the length of the full tooth height of the limiting tooth; the distance between the highest point of the second unlocking segment and the lowest point of the locking segment is greater than the length of the full tooth height of the limiting tooth.

2. The flipping mechanism for a display screen according to claim 1, characterized in that, The gear sleeve includes a first driving part, a gear part, and a second driving part connected in sequence; the first driving part and the second driving part are provided with driving blocks; the gear part includes a limiting plate; the limiting plate is provided with a first circular hole with a diameter greater than the maximum shaft diameter of the flat shaft.

3. The flipping mechanism for a display screen according to claim 2, characterized in that, It also includes a first elastic element and a second elastic element that are sleeved with the flat shaft; one end of the first elastic element is located inside the bushing and abuts against its inner end face, and the other end is located inside the first driving part and abuts against the limiting plate; one end of the second elastic element is located inside the other bushing and abuts against its inner end face, and the other end is located inside the second driving part and abuts against the limiting plate.

4. The flipping mechanism for a display screen according to claim 1, characterized in that, The end face of the bushing with limiting teeth has a flat hole with a shape consistent with the outer contour of the flat shaft.

5. The flipping mechanism for a display screen according to claim 1, characterized in that, It also includes two locking sleeves; each of the two bushings cooperates with one locking sleeve; the locking sleeve includes a first limiting segment and a second limiting segment connected in sequence; the first limiting segment includes two mutually parallel limiting surfaces; the second limiting segment is provided with positioning teeth; the positioning teeth and the limiting teeth mesh with each other; the locking sleeve is also provided with a second circular hole that penetrates the first limiting segment and the second limiting segment and has a diameter greater than the maximum shaft diameter of the flat shaft; the second circular hole is coaxially arranged with the flat shaft.

6. The flipping mechanism for a display screen according to claim 5, characterized in that, It also includes an upper cover and a lower cover that constitute the storage space; the lower cover is provided with a limiting part whose shape is consistent with the outer contour of the first limiting segment.

7. The flipping mechanism for a display screen according to claim 6, characterized in that, The upper end cover and the lower end cover also include a motor drive device, a first gear set and a second gear set that are sequentially connected in a transmission manner; the movable end of the motor drive device is provided with a first worm gear; the first gear set includes a first gear and a second worm gear arranged coaxially; the first worm gear is connected in a transmission manner to the first gear; the second worm gear is connected in a transmission manner to the second gear set.

8. The flipping mechanism for a display screen according to claim 7, characterized in that, The second gear set includes a rotating shaft, and a second gear and a third gear sleeved on the rotating shaft; the rotating shaft is provided with a shoulder; the second gear is located between the third gear and the shoulder; a third elastic element is provided inside the second gear; one end of the third elastic element abuts against the second gear, and the other end abuts against the shoulder; a friction plate is provided between the second gear and the third gear.

9. The flipping mechanism for a display screen according to claim 7, characterized in that, The upper and lower end covers also include an external signal interface and a circuit board that are electrically connected; the circuit board is electrically connected to the motor drive device.

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