CN115978382A - Turnover mechanism for display screen - Google Patents

Abstract

The invention discloses a turnover mechanism for a display screen, which belongs to the technical field of display equipment and comprises a flat shaft, two shaft sleeves and a gear sleeve, wherein the two shaft sleeves and the gear sleeve are sleeved on the flat shaft; the two shaft sleeves are positioned on two sides of the gear sleeve; the peripheral surface of the shaft sleeve is provided with J-shaped grains, and the end surface far away from the grains is provided with limiting teeth; a driving block which is attached with the grains is arranged in the gear sleeve; the bottom end of the grain of one shaft sleeve is opposite to the bottom end of the grain of the other shaft sleeve; the driving block moves along the lines through the rotation of the gear sleeve, so that the two shaft sleeves are mutually closed along the axis of the flat shaft, and the limiting teeth are changed from a locking state to an unlocking state; when the gear sleeve continues to rotate, the flat shaft can be driven to rotate, and the effect of adjusting the angle of the display equipment can be achieved; the problem of current tilting mechanism, because of the big unable wide-angle adjustment of space occupancy, and the adjustment process takes place to block easily, can't guarantee display device stationarity after the adjustment targets in place is effectively solved.

Description

Turnover mechanism for display screen

Technical Field

The invention belongs to the technical field of display equipment, and particularly relates to a turnover mechanism for a display screen.

Background

With the development of science and technology, the automation transformation of various devices is gradually increased, wherein a display is used as a common signal transmission device, and when the device is used, the display needs to be manually adjusted to a proper angle by a user to bring an optimal visual effect to the user, but the adjustment mode is complicated, in order to solve the problem, the Chinese patent invention with the publication number of CN105972400A discloses a reversible display screen which comprises a mounting seat, a display screen and a turnover mechanism, and the turnover mechanism comprises a pushing component and a positioning component; the pushing assembly comprises a reciprocating driving piece, pushing pieces and at least one linkage piece, the reciprocating driving piece is connected with the linkage piece through the pushing pieces, the linkage pieces are connected with the mounting seat in a sliding mode, and the linkage pieces are hinged with the same side edge of the display screen to form a pushing edge; the positioning assembly comprises a mechanical push rod and an electric positioning group used for positioning the display screen, two adjacent edges of the pushing edge are hinged to the mechanical push rod to form a hinged edge, and the other end of the mechanical push rod, opposite to the display screen, is hinged to the mounting seat. This display screen convenience of customers stabilizes convenient watching display screen content, does not show the blind area, effectively guarantees that the viewer can normally look over the display screen.

However, in the actual use process, the turnover display screen still has the following defects:

1) This display screen just can drive the display screen through slider and the mutual slip of slide rail and realize opening and shutting the action, in order to realize great opening angle, just need dispose the slide rail of certain length, and this space occupation volume that will obviously improve this display screen.

2) Because the both sides of display screen all are equipped with slide rail and slider, consequently have both sides slider to remove the asynchronous condition, this kind of condition will bring the problem of removal interference, and the damage of slide rail and slider can be caused in the setting, and then influences customer's impression and result of use.

Therefore, a display screen turnover mechanism which can realize automatic turnover of the display screen and can ensure turnover reliability is required to be designed.

Disclosure of Invention

In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide one kind can enough realize the automatic upset of display screen, can guarantee the display screen tilting mechanism of upset reliability again.

In order to solve the technical problems, the invention adopts the technical scheme that: a turnover mechanism for a display screen comprises a flat shaft, two shaft sleeves and a gear sleeve, wherein the two shaft sleeves and the gear sleeve are sleeved on the flat shaft; the two shaft sleeves are positioned on two sides of the gear sleeve; the peripheral surface of the shaft sleeve is provided with J-shaped grains, and the end surface far away from the grains is provided with limiting teeth; a driving block which is attached to the grains is arranged in the gear sleeve; the bottom end of the grain of one shaft sleeve is opposite to the bottom end of the grain of the other shaft sleeve.

The invention has the beneficial effects that: the turnover mechanism for the display screen is compact in structure and simple to operate, and the driving block moves along the lines by the rotation of the gear sleeve, so that the two shaft sleeves move towards the inside of the gear sleeve along the axis of the flat shaft, and the limiting teeth are changed into an unlocking state from a locking state; when the gear sleeve continues to rotate, the flat shaft can be driven to rotate, and the effect of adjusting the angle of the display equipment can be achieved.

Drawings

Fig. 1 is a schematic structural diagram of a turning mechanism for a display screen according to an embodiment of the present invention when the turning mechanism is engaged with the display screen;

fig. 2 is a schematic structural view of a turnover mechanism (an upper end cover is omitted) for a display screen according to an embodiment of the present invention, which is engaged with the display screen;

FIG. 3 is a top view of a flat shaft, a first shaft sleeve, a gear sleeve, a second shaft sleeve, a first locking sleeve, and a second locking sleeve of an embodiment of the present invention;

FIG. 4 is a top view of a flat shaft, a first bushing, a second bushing, a first resilient member, a second resilient member, a first locking sleeve, and a second locking sleeve according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a first bushing in accordance with an embodiment of the present invention;

FIG. 6 illustrates a left side view of a first bushing in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural view of a gear sleeve according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a first locking sleeve according to an embodiment of the present invention;

FIG. 9 is an elevational cross-sectional view of a second gear set in accordance with an embodiment of the present invention;

FIG. 10 is an enlarged view of FIG. 3 at A;

FIG. 11 is an enlarged view at B of FIG. 5;

description of reference numerals:

1. a flat shaft;

2. a first bushing; 21. lines; 211. a first drive section; 212. a first unlocking section; 213. a locking section; 214. a second unlocking section; 215. a second drive section; 22. limiting teeth; 23. flat holes; 24. lifting the angle;

3. a gear sleeve; 31. a drive block; 32. a first driving section; 33. a gear portion; 331. a limiting plate; 332. a first circular hole; 34. a second driving section;

4. a second shaft sleeve; 5. a first elastic element; 6. a second elastic element;

7. a first locking sleeve; 71. a first limiting section; 711. a limiting surface; 72. a second limiting section; 721. positioning teeth; 73. a second circular hole;

8. a second locking sleeve; 9. an upper end cover;

10. a lower end cover; 101. A limiting part;

11. a motor drive device; 111. A first worm;

12. a first gear set; 121. A first gear; 122. A second worm;

13. a second gear set; 131. a rotating shaft; 1311. a shaft shoulder; 132. a second gear; 133. a third gear; 134. a third elastic element; 135. a friction plate;

14. an external signal interface; 15. a circuit board; 16. a display screen; 17. a connecting frame; 18. a fastening device; 19. a bottom corner.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The most key concept of the invention is as follows: the driving block moves along the grains through the rotation of the gear sleeve, so that the first shaft sleeve and the second shaft sleeve move towards the inside of the gear sleeve along the axis of the flat shaft, and the limiting teeth are changed into an unlocking state from a locking state; when the gear sleeve continues to rotate, the flat shaft can be driven to rotate, and the effect of adjusting the angle of the display equipment can be achieved.

Referring to fig. 1 to 9, the turnover mechanism for a display screen according to the present invention includes a flat shaft 1, a first shaft sleeve 2, a gear sleeve 3, and a second shaft sleeve 4, wherein the first shaft sleeve 2, the gear sleeve 3, and the second shaft sleeve 4 are sequentially sleeved on the flat shaft 1; the circumferential surface of the first shaft sleeve 2 is provided with J-shaped grains 21, and the end surface far away from the grains 21 is provided with a limiting tooth 22; a driving block 31 which is attached to the grains 21 is arranged in the gear sleeve 3; the bottom end of the grain 21 of the first shaft sleeve 2 is opposite to the bottom end of the grain 21 of the second shaft sleeve 4.

From the above description, the beneficial effects of the present invention are: the turnover mechanism for the display screen is provided, the driving block 31 is moved along lines by the rotation of the gear sleeve 3, so that the first shaft sleeve 2 and the second shaft sleeve 4 are moved towards the inside of the gear sleeve 3 along the axis of the flat shaft 1, and the limiting teeth 22 are further changed from a locking state to an unlocking state; when the gear sleeve 3 continues to rotate, the flat shaft 1 can be driven to rotate, and the effect of adjusting the angle of the display equipment can be achieved; the device compact structure, convenient operation compare with current tilting mechanism, can also realize wide-angle regulation when the space occupancy is little, and the adjustment process is smooth, and the adjustment can guarantee display device's stationarity after targetting in place.

Furthermore, two ends of the flat shaft 1 are provided with a connecting frame 17 and a fastening device 18; both ends of the flat shaft 1 are respectively connected with a connecting frame 17 through fastening devices 18. The two ends of the flat shaft 1 can also be connected with the connecting frame 17 by welding.

As apparent from the above description, the connection frame 17 may be used to fix any display device; the fastening device 18 can limit the connecting frame 17 on the flat shaft 1, and the connecting frame 17 is prevented from falling off from the flat shaft 1.

Further, the vein 21 includes a first driving section 211, a first unlocking section 212, a locking section 213, a second unlocking section 214 and a second driving section 215 which are connected in sequence; the axes of the first driving section 211 and the second driving section 215 are parallel to the axis of the flat shaft 1; the plane of the locking section 213 is perpendicular to the axis of the flat shaft 1; the distance between the highest point of the first unlocking section 212 and the lowest point of the locking section 213 is longer than the length of the full tooth height of the limiting tooth 22; the distance between the highest point of the second unlocking section 214 and the lowest point of the locking section 213 is longer than the length of the full tooth height of the limit tooth 22.

From the above description, the design enables the first sleeve 2 and the second sleeve 4 to have an accurate locking stage, an accurate unlocking stage and an accurate driving stage, so that the adjustment precision of the gear sleeve 3 is indirectly improved, and the interference phenomenon caused by asynchronous state conversion of the first sleeve 2 and the second sleeve 4 is avoided.

Further, the gear housing 3 includes a first drive portion 32, a gear portion 33, and a second drive portion 34 connected in this order; the first driving part 32 and the second driving part 34 are internally provided with driving blocks 31; the gear portion 33 includes therein a restriction plate 331; the limiting plate 331 is provided with a first circular hole 332 with a diameter larger than the maximum axial diameter of the flat shaft 1.

Further, the turnover mechanism further comprises a first elastic element 5 and a second elastic element 6 which are sleeved with the flat shaft 1; one end of the first elastic element 5 is located inside the first shaft sleeve 2 and is abutted against the inner end face of the first shaft sleeve 2 provided with the limit teeth 22, and the other end is located inside the first driving part 32 and is abutted against the limit plate 331; one end of the second elastic element 6 is located inside the second shaft sleeve 4 and abuts against the inner end face of the second shaft sleeve 4 where the limit teeth 22 are located, and the other end of the second elastic element is located inside the second driving portion 34 and abuts against the limit plate 331.

As can be seen from the above description, when the gear sleeve 3 drives the first shaft sleeve 2 and the second shaft sleeve 4 to move relatively, the first elastic element 5 and the second elastic element 6 are in a compressed state; after the work is adjusted in the end, back drive gear sleeve 3, first axle sleeve 2 and second axle sleeve 4 can move to opposite direction under the drive of first elastic element 5 and second elastic element 6 respectively to get back to the lock-out state, and then guarantee that display device is steady to be fixed at the assigned position, and be equipped with the diameter on limiting plate 331 and be greater than the first round hole 332 of flat axle 1 maximum diameter of axle, guarantee that gear sleeve 3 can independently rotate when the unblock, avoid producing with flat axle 1 and interfere and influence the work of adjusting.

Furthermore, a flat hole 23 with the shape consistent with the outer contour of the flat shaft 1 is arranged on the end surface of the first shaft sleeve 2 provided with the limit teeth 22.

It can be known from the above description that this design makes first axle sleeve 2 only can move along the axis of flat axle 1 when the unblock, and only when the complete unblock back, first axle sleeve 2 can drive flat axle 1 and rotate, and then realizes display device's automatically regulated function.

Further, the turnover mechanism also comprises a first locking sleeve 7 and a second locking sleeve 8 which are consistent in structure; the first locking sleeve 7 comprises a first limiting section 71 and a second limiting section 72 which are connected in sequence; the first position-limiting section 71 comprises two mutually parallel position-limiting surfaces 711; the second position-limiting section 72 is provided with a positioning tooth 721; the positioning teeth 721 are meshed with the limiting teeth 22; the first locking sleeve 7 is also provided with a second round hole 73 which penetrates through the first limiting section 71 and the second limiting section 72 and has a diameter larger than the maximum shaft diameter of the flat shaft 1; the second circular hole 73 is provided coaxially with the flat shaft 1.

Furthermore, the turnover mechanism also comprises an upper end cover 9 and a lower end cover 10 which form an object placing space; the end cover is provided with a limiting part 101 with the shape consistent with the outer contour of the first limiting section 71.

Further, the base angle 19 of the positioning tooth 721 and the limit tooth 22 is less than 90 °; the lift angle 24 of the first and second unlocking sections 212, 214 is less than 90 °.

As can be seen from the above description, the display device can be ensured to be stable in the locked state by the engagement between the positioning teeth 721 and the limiting teeth 22 and by 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; the bottom angles 19 of the positioning teeth 721 and the limiting teeth 22 are ensured to be less than 90 degrees, so that the turnover mechanism has certain self-locking performance, and the condition that the internal structure is damaged due to manual misoperation of rotating the flat shaft 1 can be avoided; the lifting angle 24 of the first unlocking section 212 and the second unlocking section 214 is smaller than 90 degrees, so that the gear sleeve 3 can be conveniently adjusted automatically; and the second round hole 73 with the diameter larger than the maximum shaft diameter of the flat shaft 1 is arranged, so that the interference between the flat shaft 1 and the first locking sleeve 7 in a rotating state can be avoided, and the adjustment work of the display device is further influenced.

Further, a motor driving device 11, a first gear set 12 and a second gear set 13 which are in transmission connection in sequence are further arranged between the upper end cover 9 and the lower end cover 10; the movable end of the motor driving device 11 is provided with a first worm 111; the first gear set 12 includes a first gear 121 and a second worm 122 coaxially disposed; the first worm 111 is in transmission connection with a first gear 121; the second worm 122 is in driving connection with the second gear set 13.

Further, 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; a shaft shoulder 1311 is arranged on the rotating shaft 131; the second gear 132 is located between the first gear 121 and the shoulder 1311; a third elastic element 134 is arranged 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.

As can be seen from the above description, the third elastic element 134 can push the second gear 132 toward the third gear 133, so that the second gear 132 and the third gear 133 press the friction plate 135, and the second gear 132 and the third gear 133 can rotate synchronously; when a manual misoperation occurs and the force applied from the outside is greater than the friction force between the second gear 132 and the third gear 133, the third gear 133 can rotate relative to the second gear 132, so that the situation that internal elements are damaged due to the manual misoperation is avoided.

Further, an external signal interface 14 and a circuit board 15 which are electrically connected are also arranged 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.

As is apparent from the above description, when the external signal interface 14 receives the adjustment signal, the adjustment signal may be converted into an electrical signal through the circuit board 15 and transmitted to the motor driving device 11, thereby implementing an adjustment function of the display apparatus.

Furthermore, a position of the lower end cover 10, which is used for placing the gear sleeve 3, is provided with a limiting groove; the gear portion 33 is located in the stopper groove.

As can be seen from the above description, this design can limit the gear sleeve 3 from moving along the axis direction of the flat shaft 1, so as to provide 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 axis direction of the flat shaft 1.

The turnover mechanism can be used for various devices needing angle adjustment, and is particularly suitable for adjustment work of a display screen.

The first embodiment of the invention is as follows:

referring to fig. 1 to 2, a turnover mechanism for a display screen includes a first shaft sleeve 2, a gear sleeve 3, and a second shaft sleeve 4, which are sequentially sleeved with a flat shaft 1, and have the same structure as the first shaft sleeve 2; the circumferential surface of the first shaft sleeve 2 is provided with J-shaped grains 21, and the end surface far away from the grains 21 is provided with a limiting tooth 22; a driving block 31 which is attached to the grains 21 is arranged in the gear sleeve 3; the bottom end of the grain 21 of the first shaft sleeve 2 is opposite to the bottom end of the grain 21 of the second shaft sleeve 4; the two ends of the flat shaft 1 are provided with a connecting frame 17 and a fastening device 18; two connecting brackets 17 are located between the fastening devices 18.

Referring to fig. 3 to 7, the bellows 21 includes a first driving section 211, a first unlocking section 212, a locking section 213, a second unlocking section 214, and a second driving section 215, which are connected in sequence; the axes of the first driving section 211 and the second driving section 215 are parallel to the axis of the flat shaft 1; the plane of the locking section 213 is perpendicular to the axis of the flat shaft 1; the distance between the highest point of the first unlocking section 212 and the lowest point of the locking section 213 is longer than the length of the full tooth height of the limiting tooth 22; the distance between the highest point of the second unlocking section 214 and the lowest point of the locking section 213 is longer than the length of the full tooth height of the limit tooth 22.

The gear sleeve 3 comprises a first driving part 32, a gear part 33 and a second driving part 34 which are connected in sequence; the gear portion 33 includes therein a restriction plate 331; the limiting plate 331 is provided with a first circular hole 332 with a diameter larger than the maximum axial diameter of the flat shaft 1.

The device also comprises a first elastic element 5 and a second elastic element 6 which are sleeved with the flat shaft 1; one end of the first elastic element 5 is located inside the first shaft sleeve 2 and abuts against the inner end face of the first shaft sleeve 2 provided with the limiting teeth 22, and the other end of the first elastic element is located inside the first driving portion 32 and abuts against the limiting plate 331; one end of the second elastic element 6 is located inside the second shaft sleeve 4 and is abutted against the inner end face of the second shaft sleeve 4 provided with the limit teeth 22, and the other end is located inside the second driving part 34 and is abutted against the limit plate 331; the end surface of the first shaft sleeve 2 provided with the limit teeth 22 is provided with a flat hole 23 with the shape consistent with the outer contour of the flat shaft 1.

Referring to fig. 8, the locking device further comprises a first locking sleeve 7 and a second locking sleeve 8 which are consistent in structure; the first locking sleeve 7 comprises a first limiting section 71 and a second limiting section 72 which are connected in sequence; the first position-limiting section 71 includes two mutually parallel position-limiting surfaces 711; the second position-limiting section 72 is provided with a positioning tooth 721; the positioning teeth 721 are meshed with the limiting teeth 22; the first locking sleeve 7 is also provided with a second round hole 73 which penetrates through the first limiting section 71 and the second limiting section 72 and has a diameter larger than the maximum shaft diameter of the flat shaft 1; the second circular hole 73 is provided coaxially with the flat shaft 1.

Referring to fig. 2 and 9, an upper end cap 9 and a lower end cap 10 forming a storage space are further included; the end cover is provided with a limiting part 101 with the shape consistent with the outer contour of the first limiting section 71; the base angle 19 of the positioning tooth 721 and the limit tooth 22 is 80 °, and the lifting angle 24 of the first unlocking section 212 and the second unlocking section 214 is 45 °; a motor driving device 11, a first gear set 12 and a second gear set 13 which are in transmission connection in sequence are further arranged between the end cover 9 and the lower end cover 10; the movable end of the motor driving device 11 is provided with a first worm 111; the first gear set 12 includes a first gear 121 and a second worm 122 coaxially disposed; the first worm 111 is in transmission connection with a first gear 121; the second worm 122 is in transmission connection with 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; a shaft shoulder 1311 is arranged on the rotating shaft 131; the second gear 132 is located between the first gear 121 and the shoulder 1311; a third elastic element 134 is arranged inside the second gear 132; one end of the third elastic element 134 is abutted against the second gear 132, and the other end is abutted against the shaft shoulder 1311; a friction plate 135 is provided between the second gear 132 and the third gear 133.

The upper end cover 9 and the lower end cover 10 also comprise an external signal interface 14 and a circuit board 15 which are electrically connected; the circuit board 15 is electrically connected with the motor driving device 11; a position of the lower end cover 10, which is used for placing the gear sleeve 3, is provided with a limiting groove (not shown in the figure); the gear portion 33 is located in the stopper groove.

The working principle of the invention is as follows:

when the external signal interface 14 receives a lifting signal of the display screen 16, the circuit board 15 converts a driving signal into an electric signal and transmits the electric signal to the motor driving device 11 to operate the motor driving device; the first gear 121 and the second worm 122 on the first gear set 12 are driven to rotate by the rotation of the first worm 111; the second worm 122 drives the second gear 132 of the second gear set 13 to rotate, and the third elastic element 134 is arranged inside the second gear 132, so that the second gear 132 and the third gear 133 can press the friction plate 135 between the second gear 132 and the third gear 133 under the driving of the third elastic element 134, so that the second gear 132 and the third gear 133 can synchronously run, and the gear sleeve 3 can be driven to rotate; during the movement of the driving block 31 of the gear sleeve 3 along the "locking section — first unlocking section 212 — first driving section 211" (or "locking section — second unlocking section 214 — second driving section 215") of the thread 21, the first shaft sleeve 2 and the second shaft sleeve 4 can move along the axis of the flat shaft 1 toward the gear sleeve 3, so that the limit teeth 22 are separated from the first locking sleeve 7 and the positioning teeth 721 on the second locking sleeve 8, and the turnover mechanism is converted from the locking state to the unlocking state; then further driving the gear sleeve 3 to rotate; because the first shaft sleeve 2 and the second shaft sleeve 4 are provided with the flat holes 23 with the shapes consistent with the outer contours of the flat shaft 1, the flat shaft 1 can be driven to rotate by the point position matching between the first shaft sleeve 2 and the second shaft sleeve 4 and the flat shaft 1 in the unlocking state, and because the connecting frame 17 is connected with the flat shaft 1, the lifting (descending) work of the display equipment can be realized. After the display device reaches the designated position, the driving block 31 moves along the track of the "first driving section 211-first unlocking section 212-locking section" (or the "second driving section 215-second unlocking section 214-locking section") of the grains 21 by reversely driving the motor driving device 11, and because the first elastic element 5 and the second elastic element 6 are respectively arranged in the first shaft sleeve 2 and the second shaft sleeve 4, when the driving block 31 reaches the locking section, the first shaft sleeve 2 and the second shaft sleeve 4 can be pushed to reversely move through the elastic force, so that the limit teeth 22 and the positioning teeth 721 return to the meshing state again, and because the limit surfaces 711 matched with the lower end cover 10 are arranged on the first locking sleeve 8 and the second locking sleeve 8, the display device adjusted to the position can be stably fixed, and the shaking condition is avoided.

Because the angle between the positioning teeth 721 and the tooth tops of the limiting teeth 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 friction force between the second gear 132 and the third gear 133, the situation of damage to the internal components caused by manual misoperation can be avoided.

Example two:

the difference between the second embodiment of the present invention and the first embodiment of the present invention is that the second gear 132 and the third gear 133 of the second gear set 13 are integrally formed, the tilting mechanism using the second gear set 13 can only achieve the automatic adjustment function, and because the second gear 132 and the third gear 133 of the second gear set 13 are integrally formed, the whole body can generate a self-locking phenomenon with the first gear set when the gear sleeve is stationary, thereby ensuring that the angle of the tilting mechanism cannot be changed at will under the action of external force.

Example three:

the third embodiment of the invention is different from the first embodiment in that only one shaft sleeve is sleeved on the flat shaft 1 in the third embodiment, and the design can further facilitate the gear sleeve 3 to drive the shaft sleeve to unlock and lock, so that the influence on the integral angle adjustment work due to interference phenomenon is avoided.

In summary, the turnover mechanism for the display screen provided by the invention has a compact overall structure and is convenient and fast to operate; the driving block moves along the lines through the rotation of the gear sleeve, so that the first shaft sleeve and the second shaft sleeve move towards the inside of the gear sleeve along the axis of the flat shaft, and the limiting teeth are changed into an unlocking state from a locking state; when the gear sleeve continues to rotate, the flat shaft can be driven to rotate, and the effect of adjusting the angle of the display equipment can be achieved; the turnover mechanism overcomes the defects that the conventional turnover mechanism cannot be adjusted at a large angle due to large space occupancy rate, is easy to jam in the adjustment process, and cannot ensure the stability of display equipment after being adjusted in place.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (10)

1. A turnover mechanism for a display screen is characterized by comprising a flat shaft, two shaft sleeves and a gear sleeve, wherein the two shaft sleeves and the gear sleeve are sleeved on the flat shaft; the two shaft sleeves are positioned on two sides of the gear sleeve; the peripheral surface of the shaft sleeve is provided with J-shaped grains, and the end surface far away from the grains is provided with limiting teeth; a driving block which is attached to the grains is arranged in the gear sleeve; the bottom end of the grain of one shaft sleeve is opposite to the bottom end of the grain of the other shaft sleeve.

2. The turnover mechanism for the display screen of claim 1, wherein the texture comprises a first driving section, a first unlocking section, a locking section, a second unlocking section and a second driving section which are connected in sequence; the axes of the first driving section and the second driving section are parallel to the axis of the flat shaft; the plane where the locking section is located is perpendicular to the axis of the flat shaft; the distance between the highest point of the first unlocking section and the lowest point of the locking section is greater than the length of the full tooth height of the limiting tooth; the distance between the highest point of the second unlocking section and the lowest point of the locking section is greater than the length of the full tooth height of the limiting tooth.

3. The turnover mechanism for the display screen of claim 1, wherein the gear sleeve comprises a first driving part, a gear part and a second driving part which are connected in sequence; driving blocks are arranged in the first driving part and the second driving part; the gear part comprises a limit plate inside; and the limiting plate is provided with a first round hole with the diameter larger than the maximum shaft diameter of the flat shaft.

4. The turnover mechanism for the display screen of claim 3, further comprising a first elastic element and a second elastic element sleeved with the flat shaft; one end of the first elastic element is positioned in one shaft sleeve and is abutted against the inner end face of the shaft sleeve provided with the limiting teeth, and the other end of the first elastic element is positioned in the first driving part and is abutted against the limiting plate; one end of the second elastic element is located in the other shaft sleeve and is abutted to the inner end face of the other shaft sleeve, which is provided with the limiting teeth, and the other end of the second elastic element is located in the second driving portion and is abutted to the limiting plate.

5. The turnover mechanism for the display screen of claim 1, wherein the end face of the shaft sleeve provided with the limit teeth is provided with a flat hole with a shape consistent with the outer contour of the flat shaft.

6. The turnover mechanism for the display screen of claim 1, further comprising two locking sleeves; the two shaft sleeves are respectively matched with a locking sleeve; the locking sleeve comprises a first limiting section and a second limiting section which are sequentially connected; the first limiting section comprises two limiting surfaces which are parallel to each other; the second limiting section is provided with a positioning tooth; the positioning teeth are meshed with the limiting teeth; the locking sleeve is also provided with a second round hole which penetrates through the first limiting section and the second limiting section and has the diameter larger than the maximum shaft diameter of the flat shaft; the second round hole and the flat shaft are coaxially arranged.

7. The turnover mechanism for the display screen of claim 6, further comprising an upper end cover and a lower end cover which form an object placing space; the lower end cover is provided with a limiting part with the shape consistent with the outer contour of the first limiting section.

8. The turnover mechanism for the display screen of claim 7, further comprising a motor driving device, a first gear set and a second gear set which are in transmission connection with each other in sequence between the upper end cover and the lower end cover; a first worm is arranged at the movable end of the motor driving device; the first gear set comprises a first gear and a second worm which are coaxially arranged; the first worm is in transmission connection with the first gear; the second worm is in transmission connection with the second gear set.

9. The turnover mechanism for the display screen of claim 8, wherein the second gear set comprises a rotating shaft, and a second gear and a third gear which are sleeved with the rotating shaft; a shaft shoulder is arranged on the rotating shaft; the second gear is positioned between the first gear and the shaft shoulder; a third elastic element is arranged inside the second gear; one end of the third elastic element is abutted against the second gear, and the other end of the third elastic element is abutted against the shaft shoulder; and a friction plate is arranged between the second gear and the third gear.

10. The turnover mechanism for the display screen of claim 8, wherein the upper end cover and the lower end cover further comprise an external signal interface and a circuit board which are electrically connected; the circuit board is electrically connected with the motor driving device.

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