Arc adjustment mechanism, LED unit display screen and LED display screen

Abstract

The present invention relates to an arc adjustment mechanism, an LED unit display screen and an LED display screen, comprising a telescopic mechanism and a limiting mechanism, wherein the telescopic mechanism comprises a first fixed seat, a first movable member, a second movable member and a second fixed seat, wherein the first movable member is hinged on the first fixed seat around a first rotation axis, and the second movable member is hinged on the second fixed seat around a second rotation axis, and the relative sliding between the first movable member and the second movable member can reduce or increase the distance between the first rotation axis and the second rotation axis to adjust the arc of the LED unit display screen; the limiting mechanism comprises a first connecting block, a rotating handle, a rotating sleeve, a first telescopic shaft and a locking mechanism, and the locking mechanism can temporarily fix the rotating handle on the first connecting block to limit the rotation of the rotating handle, thereby limiting the relative sliding of the first movable member and the second movable member. The LED unit display screen is bent into an arc, and the smoothness of the arc surface is improved, so that the display effect of the LED display screen is better.

Description

Technical Field

[0001] The invention belongs to the technical field of arc adjustment of LED display screens, and in particular relates to an arc adjustment mechanism, an LED unit display screen and an LED display screen. Background Art

[0002] In recent years, LED display technology has developed rapidly, and LED display screens have also become popular rapidly. They have been widely used in many occasions, and people's requirements for LED display screens are getting higher and higher. In some occasions, curved screens are required for the best display effect. The existing method of splicing curved screens is to first fix multiple LED display units on the box to form an LED display module, and then use the arc lock on the box to change the connection angle of adjacent LED display modules to achieve the splicing of curved screens. However, since the shape of the box itself is fixed and cannot be bent, the curved surface is obviously blocky and prismatic, and the smoothness of the curved surface is poor. At the same time, the gaps between the boxes easily lead to the formation of structural dark lines or dark strips, which cannot guarantee a good viewing angle effect of the picture and the display effect is poor. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to provide an arc adjustment mechanism, an LED unit display screen and an LED display screen in view of the problem that the arc surface smoothness of the existing arc screen is poor.

[0004] To solve the above technical problems, an embodiment of the present invention provides an arc adjustment mechanism, including a telescopic mechanism and a limiting mechanism, the telescopic mechanism including a first fixed seat, a first movable member, a second movable member and a second fixed seat, the first end of the first movable member is hinged on the first fixed seat around a first rotation axis, the first end of the second movable member is hinged on the second fixed seat around a second rotation axis, the second end of the first movable member is slidably connected to the second end of the second movable member, the first fixed seat is used to be fixedly connected to the power box, and the second fixed seat is used to be fixedly connected to the box frame; the first rotation axis is parallel to the second rotation axis; the sliding direction of the first movable member and the second movable member is perpendicular to the first rotation axis and the second rotation axis;

[0005] The limiting mechanism includes a first connecting block, a rotating handle, a rotating sleeve, a first telescopic shaft and a locking mechanism, wherein the first connecting block is fixed to the second movable member, the rotating handle is rotatably connected to the first connecting block, the first end of the rotating sleeve is fixed to the rotating handle, the first telescopic shaft is movably connected to the first end of the inner cavity of the rotating sleeve, and the locking mechanism can temporarily fix the rotating handle to the first connecting block to limit the rotation of the rotating handle;

[0006] The relative sliding between the first movable member and the second movable member can reduce or increase the distance between the first rotation axis and the second rotation axis to adjust the curvature of the LED unit display screen;

[0007] The forward rotation of the rotating handle can drive the first telescopic shaft to extend out of the rotating sleeve through the rotating sleeve and combine with the telescopic mechanism to limit the relative sliding of the first movable member and the second movable member, and the arc adjustment mechanism enters a locked state;

[0008] When the arc-shaped adjustment mechanism is in a locked state, the reverse rotation of the rotary handle can drive the first telescopic shaft to retract into the rotary sleeve through the rotary sleeve and separate from the telescopic mechanism.

[0009] Optionally, the second end of the first movable member is linearly slidably connected to the second end of the second movable member.

[0010] Optionally, the second movable member includes an upper shell and a lower cover covering the upper shell, the first end of the upper shell is hinged to the second fixing seat, a receiving cavity is formed between the second end of the upper shell and the lower cover, and the second end of the first movable member is slidably connected to the receiving cavity;

[0011] The rotating handle is provided with a first through hole axially penetrating the inner cavity of the rotating sleeve, the first connecting block is provided with a second through hole axially penetrating the first through hole, the lower cover is provided with a third through hole axially penetrating the second through hole, and the third through hole is communicated with the accommodating cavity;

[0012] A rack is provided on the side of the first movable part facing the lower cover, and a latching tooth cooperating with the rack is provided on the end of the first telescopic shaft close to the first movable part; positive rotation of the rotating handle can drive the first telescopic shaft to extend into the accommodating cavity, so that the latching tooth engages with the rack, and the arc adjustment mechanism enters a locked state.

[0013] Optionally, the locking mechanism comprises an elastic member, a gear fixed to the first connecting block and a swing rod hinged to the rotating handle, a locking claw cooperating with the gear is disposed at the first end of the swing rod, a button is disposed at the second end of the swing rod, and a hinge shaft of the swing rod hinged to the rotating handle is located between the locking tooth and the button;

[0014] One end of the elastic member is connected to the rotating handle, and the other end of the elastic member is connected to the rocker arm. The elastic force of the elastic member acting on the rocker arm keeps the locking claw engaged with the gear to limit the rotation of the rotating handle; pressing the button can separate the locking claw from the gear.

[0015] Optionally, a first spiral guide groove is provided on the outer peripheral wall of the first telescopic shaft, and a first limit pin is provided in the rotating sleeve, and the first limit pin is movably provided in the first guide groove.

[0016] Optionally, the first telescopic shaft is a stepped shaft, the diameter of the first section of the first telescopic shaft is smaller than the diameter of the second section of the first telescopic shaft, a first spring is sleeved on the first section of the first telescopic shaft, the latch tooth is arranged on the first section of the first telescopic shaft, the first guide groove is arranged on the second section of the first telescopic shaft, and the first telescopic shaft moves in the direction of extending out of the rotating sleeve to compress the first spring when the rotating handle rotates forward.

[0017] Optionally, the telescopic mechanism is provided with two, the limiting mechanism further comprises a second connecting block and a second telescopic shaft, the second connecting block is rotatably connected to the second end of the rotating sleeve, the second telescopic shaft is movably connected to the second end of the inner cavity of the rotating sleeve, the second movable member of the first telescopic mechanism is fixedly connected to the first connecting block, and the second movable member of the second telescopic mechanism is fixedly connected to the second connecting block;

[0018] The forward rotation of the rotating handle can drive the first telescopic shaft to extend from the first end of the rotating sleeve and combine with the first telescopic mechanism through the rotating sleeve, so as to limit the relative sliding of the first movable part of the first telescopic mechanism and the second movable part of the first telescopic mechanism. At the same time, the second telescopic shaft is driven to extend from the second end of the rotating sleeve and combine with the second telescopic mechanism through the rotating sleeve, so as to limit the relative sliding of the first movable part of the second telescopic mechanism and the second movable part of the second telescopic mechanism, and the arc adjustment mechanism enters a locked state;

[0019] When the arc adjustment mechanism is in a locked state, rotating the rotating handle in the opposite direction can drive the first telescopic shaft to retract the rotating sleeve and separate from the first telescopic mechanism through the rotating sleeve, and at the same time drive the second telescopic shaft to retract the rotating sleeve and separate from the second telescopic mechanism through the rotating sleeve.

[0020] On the other hand, the present invention further provides an LED unit display screen, comprising the arc adjustment mechanism described in any of the aforementioned technical solutions.

[0021] On the other hand, the present invention further provides an LED unit display screen, comprising an LED display module, a power supply box, a box frame and two arc adjustment mechanisms as described in any of the above technical solutions;

[0022] The first fixed seat of the first arc adjustment mechanism is fixedly connected to the left side of the power box, and the second fixed seat of the first arc adjustment mechanism is fixedly connected to the left side frame of the box frame; the first fixed seat of the second arc adjustment mechanism is fixedly connected to the right side of the power box, and the second fixed seat of the second arc adjustment mechanism is fixedly connected to the right side frame of the box frame.

[0023] On the other hand, the present invention further provides an LED display screen, which is assembled from a plurality of LED unit display screens as described in any of the above technical solutions.

[0024] The arc adjustment mechanism, LED unit display screen and LED display screen provided by the embodiment of the present invention, compared with the prior art, the arc adjustment mechanism of the present invention can bend the LED unit display screen into an arc, and then splice a plurality of arc-shaped LED unit display screens into a large arc-shaped LED display screen. Compared with the arc screen spliced ​​by changing the connection angle of adjacent LED display unit screens by using arc locks, the gap between adjacent LED unit display screens is reduced, and the structural dark lines or dark strips between adjacent LED unit display screens due to the large gap affecting the display effect are avoided, and the smoothness of the arc surface is improved, so that the display effect of the LED display screen is better; the curvature of the LED unit display screen can be adjusted by the relative movement distance of the first movable member and the second movable member. Thereby, an arc screen with different curvatures can be obtained, which is more convenient to adjust and improves the versatility of the LED unit display screen; the first movable member is hinged on the first fixed seat, and the second movable member is hinged on the second fixed seat, which is conducive to the relative sliding between the first movable member and the second movable member, and improves the flexibility of the curvature adjustment of the LED unit display screen. At the same time, the first telescopic shaft is driven to extend or retract the rotating sleeve through the rotation movement of the rotating sleeve, which is simpler to operate and convenient for adjustment; the locking mechanism temporarily fixes the rotating handle on the first connecting block to limit the rotation of the rotating handle, and the first telescopic shaft limits the relative sliding of the first movable member and the second movable member, so that the arc adjustment mechanism enters a locked state, thereby fixing the arc of the LED unit display screen and improving the stability of the arc screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural schematic diagram of an arc adjustment mechanism provided by an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 Schematic diagram of the explosion structure;

[0027] Figure 3 yes Figure 1 Magnified cross-sectional view of

[0028] Figure 4 yes Figure 2A magnified exploded view of the locking mechanism and the rotating handle;

[0029] Figure 5 It is a structural schematic diagram of an LED unit display screen provided by an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of an LED unit display screen provided by an embodiment of the present invention when the distance between the first rotation axis and the second rotation axis is reduced;

[0031] Figure 7 It is a schematic diagram of an LED unit display screen provided by an embodiment of the present invention when the distance between the first rotation axis and the second rotation axis increases.

[0032] The reference numerals in the specification are as follows:

[0033] 10. Arc adjustment mechanism;

[0034] 1. telescopic mechanism; 11. first fixed seat; 12. first movable member; 121. rack; 122. angle mark; 123. guide column; 124. positioning groove; 13. second movable member; 131. upper shell; 132. lower cover; 133. third through hole; 134. glass bead; 14. second fixed seat;

[0035] 2. Limiting mechanism; 21. First connecting block; 211. Second through hole; 22. Rotating sleeve; 221. First limiting pin; 222. Second limiting pin; 23. First telescopic shaft; 231. First guide groove; 232. Clamping teeth; 24. Locking mechanism; 241. Gear; 242. Rocker; 243. Elastic member; 244. Button; 245. Stop claw; 246. Articulated shaft; 25. First spring; 26. Second connecting block; 27. Second telescopic shaft; 271. Second guide groove; 28. Second spring; 29. ​​Rotating handle; 291. First through hole; 210. Sheath;

[0036] 20. LED display module; 30. power box; 40. cabinet frame. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] like Figure 1 and Figure 2As shown, the arc adjustment mechanism 10 provided in the embodiment of the present invention includes a telescopic mechanism 1 and a limiting mechanism 2, the telescopic mechanism 1 includes a first fixed seat 11, a first movable member 12, a second movable member 13 and a second fixed seat 14, the first end of the first movable member 12 is hinged on the first fixed seat 11 around the first rotation axis, the first end of the second movable member 13 is hinged on the second fixed seat 14 around the second rotation axis, the second end of the first movable member 12 is slidably connected to the second end of the second movable member 13, the first fixed seat 11 is used to be fixedly connected to the power box 30, and the second fixed seat 14 is used to be fixedly connected to the box frame 40; the first rotation axis is parallel to the second rotation axis; the sliding direction of the first movable member 12 and the second movable member 13 is perpendicular to the first rotation axis and the second rotation axis.

[0039] The limiting mechanism 2 includes a first connecting block 21, a rotating handle 29, a rotating sleeve 22, a first telescopic shaft 23 and a locking mechanism 24. The first connecting block 21 is fixed on the second movable member 13. The rotating handle 29 is rotatably connected to the first connecting block 21. The first end of the rotating sleeve 22 is fixed on the rotating handle 29. The first telescopic shaft 23 is movably connected to the first end of the inner cavity of the rotating sleeve 22. The locking mechanism 24 can temporarily fix the rotating handle 29 on the first connecting block 21 to limit the rotation of the rotating handle 29.

[0040] The relative sliding between the first movable member 12 and the second movable member 13 can reduce or increase the distance between the first rotation axis and the second rotation axis, so as to adjust the curvature of the LED unit display screen.

[0041] The forward rotation of the rotating handle 29 can drive the first telescopic shaft 23 to extend out of the rotating sleeve 22 and combine with the telescopic mechanism 1 through the rotating sleeve 22 to limit the relative sliding of the first movable member 12 and the second movable member 13, and the arc adjustment mechanism 10 enters a locked state.

[0042] When the arc adjustment mechanism 10 is in a locked state, the reverse rotation of the rotary handle 29 can drive the first telescopic shaft 23 to retract the rotary sleeve 22 and separate from the telescopic mechanism 1 through the rotary sleeve 22 .

[0043] The first fixing seat 11 of the arc adjustment mechanism 10 is fixed on the power box 30, and the second fixing seat 14 is fixed on the box frame 40. The first movable member 12 and the second movable member 13 are relatively moved, which can drive the first fixing seat 11 and the second fixing seat 14 to move closer to or farther from each other, so that the power box 30 and the box frame 40 move closer to or farther from each other, thereby adjusting the curvature of the LED unit display screen. After the curvature adjustment is completed, the forward rotation of the rotating handle 29 drives the rotating sleeve 22 to rotate forward, and the first telescopic shaft 23 is driven to extend out of the rotating sleeve 22 and combine with the telescopic mechanism 1 through the rotating sleeve 22, and then the locking mechanism 24 temporarily fixes the rotating handle 29 on the first connecting block 21 , limiting the rotation of the rotating handle 29, so that the first telescopic shaft 23 limits the relative sliding of the first movable member 12 and the second movable member 13, and the arc adjustment mechanism 10 enters a locked state, thereby fixing the curvature of the LED unit display screen, so that the LED unit display screen is adjusted to a curved screen; then the locking mechanism 24 releases the restriction on the rotation of the rotating handle 29, and the rotating handle 29 is rotated in the reverse direction to drive the rotating sleeve 22 to rotate in the reverse direction, and the rotating sleeve 22 drives the first telescopic mechanism 1 to retract the rotating sleeve 22 and separate from the telescopic mechanism 1, and the first movable member 12 can slide relative to the second movable member 13, so that the LED unit display screen can be adjusted to a curved screen with different curvatures.

[0044] Compared with the prior art, the arc adjustment mechanism 10 provided in the embodiment of the present invention can bend a single LED unit display screen into an arc screen, and then splice multiple arc-shaped LED unit display screens into a large arc screen. Compared with the arc screen spliced ​​by changing the connection angle of adjacent LED display unit screens by using arc locks, the gap between adjacent LED unit display screens is reduced, and the structural dark lines or dark strips between adjacent LED unit display screens due to excessive gaps affecting the display effect are avoided, the smoothness of the arc surface is improved, and the display effect of the LED display screen is better; the curvature of the LED unit display screen can be adjusted by the relative movement distance of the first movable member 12 and the second movable member 13, so as to obtain arc screens with different curvatures, which is more convenient to adjust and improves The versatility of the LED unit display screen is improved; the first movable member 12 is hinged on the first fixed seat 11, and the second movable member 13 is hinged on the second fixed seat 14, which is conducive to the relative sliding between the first movable member 12 and the second movable member 13, and improves the flexibility of the curvature adjustment of the LED unit display screen. At the same time, the first telescopic shaft 23 is driven to extend or retract the rotating sleeve 22 through the rotation movement of the rotating sleeve 22, which is simpler to operate and convenient for adjustment; the locking mechanism 24 temporarily fixes the rotating handle 29 on the first connecting block 21 to limit the rotation of the rotating handle 29, and the first telescopic shaft 23 limits the relative sliding of the first movable member 12 and the second movable member 13, so that the arc adjustment mechanism 10 enters a locked state, thereby fixing the arc of the LED unit display screen and improving the stability of the arc screen.

[0045] In one embodiment, if Figure 2 As shown, the second end of the first movable member 12 is linearly slidably connected to the second end of the second movable member 13. The structure of the arc adjustment mechanism 10 is simplified, and the occupied space of the arc adjustment mechanism 10 is reduced, which is conducive to use in a smaller installation space; the sliding structure is simple, easy to operate, and can more accurately adjust the curvature of the LED unit display screen.

[0046] In one embodiment, if Figure 2 and Figure 3 As shown, the second movable member 13 includes an upper shell 131 and a lower cover 132 covering the upper shell 131, the first end of the upper shell 131 is hinged to the second fixing seat 14, and a receiving cavity is formed between the second end of the upper shell 131 and the lower cover 132, and the second end of the first movable member 12 is slidably connected in the receiving cavity. The relative sliding of the first movable member 12 and the second movable member 13 is facilitated, the structure is simpler, the weight of the arc adjustment mechanism 10 is reduced, and the installation is convenient.

[0047] The rotating handle 29 is provided with a first through hole 291 axially penetrating the inner cavity of the rotating sleeve 22, the first connecting block 21 is provided with a second through hole 211 axially penetrating the first through hole 291, the lower cover 132 is provided with a third through hole 133 axially penetrating the second through hole 211, and the third through hole 133 is connected to the accommodating cavity.

[0048] A rack 121 is provided on the side of the first movable member 12 facing the lower cover 132, and a latching tooth 232 cooperating with the rack 121 is provided on the end of the first telescopic shaft 23 close to the first movable member 12; the first telescopic shaft 23 can be driven to extend into the accommodating cavity by rotating the rotary handle 29 in the forward direction, so that the latching tooth 232 is engaged with the rack 121, and the arc adjustment mechanism 10 enters the locked state. The rotary handle 29 is rotated in the forward direction, so that the first telescopic shaft 23 is driven to pass through the first through hole 291, the second through hole 211 and the third through hole 133 in sequence and then extend into the accommodating cavity, and the latching tooth 232 is engaged with the rack 121, so that the first telescopic shaft 23 and the first movable member 12 are engaged to limit the relative sliding of the first movable member 12 and the second movable member 13. The engagement of the latching tooth 232 with the rack 121 is more stable, which improves the stability of the arc screen and ensures the display effect.

[0049] In one embodiment, if Figure 2 As shown, a guide post 123 is provided on the first movable member 12, and a third guide groove is provided at a position corresponding to the guide post 123 of the second movable member 13, and the guide post 123 is slidably connected with the third guide groove, which guides the relative sliding of the first movable member 12 and the second movable member 13, thereby preventing the first movable member 12 from sliding relative to the second movable member 13.

[0050] In one embodiment, if Figure 2 As shown, the first movable member 12 is provided with a positioning groove 124, and the second movable member 13 is provided with a glass bead 134 at a position corresponding to the positioning groove 124. This facilitates the adjustment and positioning of the LED unit display screen when it is bent, and improves the adjustment accuracy and efficiency.

[0051] In one embodiment, if Figure 1 As shown, the first movable member 12 is provided with an angle mark 122, and the second movable member 13 is provided with an angle mark hole at a position corresponding to the angle mark 122. Each angle mark 122 corresponds to a positioning groove 124. Setting the angle mark 122 can intuitively adjust the curvature of the LED unit display screen, making the adjustment more convenient and improving the adjustment efficiency.

[0052] The box frame 40 has a first mounting surface for mounting the LED display module 20, and the power box 30 has a second mounting surface for mounting the LED display module 20. After the arc adjustment mechanism 10 is mounted between the box frame 40 and the power box 30, assuming that the LED unit display screen is a plane in the initial state, the angle between the first mounting surface and the second mounting surface is the initial angle (the corresponding scale mark at the initial angle is 0°). When the angle between the first mounting surface and the second mounting surface is adjusted to a positive numerical scale, the distance between the first fixing seat 11 and the second fixing seat 14 is reduced, and the arc surface of the LED unit display screen is convex (such as Figure 6 When the angle between the first mounting surface and the second mounting surface is adjusted to a negative value scale, the distance between the first fixing seat 11 and the second fixing seat 14 increases, and the curved surface of the LED unit display screen is concave (as shown in FIG. Figure 7 shown).

[0053] In such Figure 1 In the illustrated embodiment, the angle between two adjacent positioning grooves 124 is 2.5°. The angle between two adjacent grids of the angle mark 122 is also 2.5°. Specifically, the angle mark 122 has 9 gears: -10°, -7.5°, -5°, -2.5°, 0°, 2.5°, 5°, 7.5°, and 10°. It can be understood that each time the glass bead 134 moves a limiting groove, the angle between the first mounting surface and the second mounting surface can be adjusted to 2.5°, that is, the arc adjustment angle of the LED unit display screen is 2.5°. The angle mark 122 can intuitively display the adjustment angle of the LED unit display screen to the operator.

[0054] In other embodiments, the adjustment angle between two adjacent positioning slots 124 can be customized according to user needs.

[0055] In one embodiment, if Figure 2 As shown, the outer peripheral wall of the rotating sleeve 22 is covered with a sheath 210. The sheath 210 protects the rotating sleeve 22 and facilitates the rotation of the rotating sleeve 22.

[0056] In one embodiment, if Figure 4 As shown, the locking mechanism 24 includes an elastic member 243, a gear 241 fixed to the first connecting block 21 and a rocker arm 242 hinged on the rotating handle 29, a first end of the rocker arm 242 is provided with a stopping claw 245 cooperating with the gear 241, a second end of the rocker arm 242 is provided with a button 244, and a hinge shaft 246 of the rocker arm 242 hinged to the rotating handle 29 is located between the stopping tooth and the button 244.

[0057] One end of the elastic member 243 is connected to the rotating handle 29, and the other end of the elastic member 243 is connected to the swing rod 242. The elastic force of the elastic member 243 on the swing rod 242 keeps the stop claw 245 meshed with the gear 241 to limit the rotation of the rotating handle 29; pressing the button 244 can separate the stop claw 245 from the gear 241. Pressing the button 244 and rotating the rotating handle 29 at the same time can drive the first telescopic shaft 23 to extend or retract the rotating sleeve 22. Release the button 244, the stop claw 245 meshes with the gear 241, and can limit the rotation of the rotating handle 29, thereby limiting the movement of the first telescopic shaft 23; the locking mechanism 24 has a simple structure and is easy to operate, so that the arc adjustment mechanism 10 can quickly enter or cut out of the locking state, improve the adjustment accuracy and efficiency, facilitate the adjustment operation by a single person, and reduce the installation cost.

[0058] In one embodiment, if Figure 2 and Figure 3 As shown, a spiral first guide groove 231 is provided on the outer peripheral wall of the first telescopic shaft 23 , and a first limiting pin 221 is provided in the rotating sleeve 22 . The first limiting pin 221 is movably provided in the first guide groove 231 . The rotating sleeve 22 is rotated forward, thereby driving the first limiting pin 221 to move from one end of the first guide groove 231 close to the first connecting block 21 to one end of the first guide groove 231 away from the first connecting block 21, so as to extend the first telescopic shaft 23 out of the rotating sleeve 22; the rotating sleeve 22 is rotated reversely, thereby driving the first limiting pin 221 to move from one end of the first guide groove 231 away from the first connecting block 21 to one end of the first guide groove 231 close to the first connecting block 21, so as to retract the first telescopic shaft 23 into the rotating sleeve 22; the first telescopic shaft 23 is driven to move axially along the rotating sleeve 22 through the rotational motion of the rotating sleeve 22, so as to better adjust the movement of the first telescopic shaft 23, so as to facilitate limiting the relative sliding of the first movable member 12 and the second movable member 13.

[0059] In one embodiment, if Figure 2 As shown, the first telescopic shaft 23 is a stepped shaft, the diameter of the first section of the first telescopic shaft 23 is smaller than the diameter of the second section of the telescopic shaft, the first section of the first telescopic shaft 23 is sleeved with a first spring 25, the latching teeth 232 are arranged in the first section of the first telescopic shaft 23, the first guide groove 231 is arranged in the second section of the first telescopic shaft 23, and the first telescopic shaft 23 moves in the direction of extending out of the rotating sleeve 22 when the rotating handle 29 rotates forward to compress the first spring 25. The first spring 25 is arranged to facilitate the first telescopic shaft 23 to retract the rotating sleeve 22, thereby improving the adjustment efficiency.

[0060] In one embodiment, if Figures 1 to 3As shown, two telescopic mechanisms 1 are provided, and the limiting mechanism 2 further includes a second connecting block 26 and a second telescopic shaft 27, the second connecting block 26 is rotatably connected to the second end of the rotating sleeve 22, the second telescopic shaft 27 is movably connected to the second end of the inner cavity of the rotating sleeve 22, the second movable member 13 of the first telescopic mechanism 1 is fixedly connected to the first connecting block 21, and the second movable member 13 of the second telescopic mechanism 1 is fixedly connected to the second connecting block 26. Providing two telescopic mechanisms 1 can better and more accurately adjust the curvature of the LED unit display screen, avoid the inconsistency of the curvature of the two ends of the LED unit display screen along the axial direction of the rotating sleeve 22, and improve the accuracy of the arc adjustment of the LED unit display screen.

[0061] The forward rotation of the rotating handle 29 can drive the first telescopic shaft 23 to extend from the first end of the rotating sleeve 22 and combine with the first telescopic mechanism 1 through the rotating sleeve 22, so as to limit the relative sliding of the first movable part 12 of the first telescopic mechanism 1 and the second movable part 13 of the first telescopic mechanism 1. At the same time, the second telescopic shaft 27 is driven by the rotating sleeve 22 to extend from the second end of the rotating sleeve 22 and combine with the second telescopic mechanism 1, so as to limit the relative sliding of the first movable part 12 of the second telescopic mechanism 1 and the second movable part 13 of the second telescopic mechanism 1, and the arc adjustment mechanism 10 enters a locked state.

[0062] In the locked state of the arc adjustment mechanism 10, the reverse rotating handle 29 can drive the first telescopic shaft 23 to retract the rotating sleeve 22 and separate from the first telescopic mechanism 1 through the rotating sleeve 22, and at the same time drive the second telescopic shaft 27 to retract the rotating sleeve 22 and separate from the second telescopic mechanism 1 through the rotating sleeve 22.

[0063] The first telescopic shaft 23 and the second telescopic shaft 27 are controlled to extend or retract synchronously by a rotating sleeve 22, thereby simplifying the overall structure of the arc adjustment mechanism 10, making the operation simpler and more convenient, facilitating single-person operation, improving the adjustment efficiency, and reducing the installation cost.

[0064] In one embodiment, if Figure 2 and Figure 3As shown, a spiral second guide groove 271 is provided on the outer peripheral wall of the second telescopic shaft 27, and the rotation direction of the second guide groove 271 is opposite to the rotation direction of the first guide groove 231. A second limit pin 222 is provided in the rotating sleeve 22, and the second limit pin 222 is movably provided in the second guide groove 271. The rotating sleeve 22 is rotated forward, thereby driving the second limiting pin 222 to move from the end of the second guide groove 271 close to the second connecting block 26 to the end of the second guide groove 271 away from the second connecting block 26, so as to extend the second telescopic shaft 27 out of the rotating sleeve 22; the rotating sleeve 22 is rotated reversely, thereby driving the second limiting pin 222 to move from the end of the second guide groove 271 away from the second connecting block 26 to the end of the second guide groove 271 close to the second connecting block 26, so as to retract the second telescopic shaft 27 into the rotating sleeve 22; the rotational movement of the rotating sleeve 22 drives the second telescopic shaft 27 to move axially along the rotating sleeve 22, so as to better adjust the movement of the second telescopic shaft 27, so as to facilitate limiting the relative sliding of the first movable member 12 and the second movable member 13.

[0065] In one embodiment, if Figure 2 As shown, the second telescopic shaft 27 is a stepped shaft, the diameter of the first section of the second telescopic shaft 27 is smaller than the diameter of the second section of the telescopic shaft, the first section of the second telescopic shaft 27 is provided with a latching tooth 232, the first section of the second telescopic shaft 27 is sleeved with a second spring 28, the second guide groove 271 is provided in the second section of the second telescopic shaft 27, and the second telescopic shaft 27 moves in the direction of extending out of the rotating sleeve 22 when the rotating handle 29 rotates forward to compress the second spring 28. The second spring 28 is provided to facilitate the retraction of the second telescopic shaft 27 into the rotating sleeve 22, thereby improving the adjustment efficiency.

[0066] On the other hand, the present invention further provides an LED unit display screen, comprising the arc adjustment mechanism 10 described in any of the aforementioned embodiments.

[0067] Compared with the prior art, the LED unit display screen provided by the embodiment of the present invention has an arc adjustment mechanism 10 that can bend a single LED unit display screen into an arc screen. Compared with the arc screen spliced ​​by changing the connection angles of adjacent LED display unit screens using arc locks, it avoids the structural dark lines or dark strips between adjacent LED unit display screens that affect the display effect due to excessive gaps, improves the smoothness of the arc surface, and makes the display effect of the LED unit display screen better; the degree of curvature of the LED unit display screen can be adjusted by the relative movement distance of the first movable part 12 and the second movable part 13, so as to obtain arc screens with different curvatures, which makes adjustment more convenient and improves the versatility of the LED unit display screen.

[0068] On the other hand, Figure 5As shown, the present invention further provides an LED unit display screen, comprising an LED display module 20, a power box 30, a box frame 40 and two arc adjustment mechanisms 10 as described in any of the above embodiments.

[0069] The first fixed seat 11 of the first arc adjustment mechanism 10 is fixedly connected to the left side of the power box 30, and the second fixed seat 14 of the first arc adjustment mechanism 10 is fixedly connected to the left side frame of the box frame 40; the first fixed seat 11 of the second arc adjustment mechanism 10 is fixedly connected to the right side of the power box 30, and the second fixed seat 14 of the second arc adjustment mechanism 10 is fixedly connected to the right side frame of the box frame 40.

[0070] Compared with the prior art, the LED unit display screen provided by the embodiment of the present invention is that when the LED unit display screen of the present invention is adjusted, the first arc adjustment mechanism 10 and the second arc adjustment mechanism 10 are not in a locked state, and the left frame and the right frame of the box frame 40 are relatively moved, thereby driving the first movable member 12 of the first arc adjustment mechanism 10 and the second movable member 13 of the first arc adjustment mechanism 10 to slide relative to each other, and the first movable member 12 of the second arc adjustment mechanism 10 and the second movable member 13 of the second arc adjustment mechanism 10 to slide relative to each other, so that the first arc adjustment mechanism The first arc adjustment mechanism 10 drives the left frame of the box frame 40 and the LED display module 20 between the power box 30 to bend, and the second arc adjustment mechanism 10 drives the right frame of the box frame 40 and the LED display module 20 between the power box 30 to bend, so that the LED unit display screen is bent into an arc screen; compared with the arc screen spliced ​​by changing the connection angle of adjacent LED display unit screens using an arc lock, it avoids the structural dark lines or dark strips between adjacent LED unit display screens due to excessive gaps that affect the display effect, improves the smoothness of the arc surface, and makes the display effect of the LED unit display screen better.

[0071] Preferably, the LED display module 20 includes a plurality of display units, and adjacent display units are movably connected, the leftmost display unit is fixedly connected to the left frame of the box frame 40, the rightmost display unit is fixedly connected to the right frame of the box frame 40, and the middle display unit is fixedly connected to the power box 30. When the first movable member 12 of the first arc adjustment mechanism 10 and the second movable member 13 of the first arc adjustment mechanism 10 slide relative to each other, the display unit between the left frame of the box frame 40 and the power box 30 is driven to move, thereby changing the connection angle between adjacent display units; when the first movable member 12 of the second arc adjustment mechanism 10 and the second movable member 13 of the second arc adjustment mechanism 10 slide relative to each other, the display unit between the right frame of the box frame 40 and the power box 30 is driven to move, thereby changing the connection angle between adjacent display units, and then the LED unit display screen is bent into an arc screen, the smoothness of the arc surface is improved, and the display effect of the LED unit display screen is better.

[0072] On the other hand, the present invention further provides an LED display screen, which is assembled from a plurality of LED unit display screens as described in any of the above embodiments.

[0073] Compared with the prior art, the LED display screen provided by the embodiment of the present invention has an arc adjustment mechanism 10 that can bend a single LED unit display screen into an arc screen, and then splice multiple arc-shaped LED unit display screens into a large arc-shaped LED display screen. Compared with the arc screen spliced ​​by changing the connection angle of adjacent LED display unit screens using an arc lock, the gap between adjacent LED unit display screens is reduced, and the display effect is prevented from being affected by structural dark lines or dark strips due to excessive gaps between adjacent LED unit display screens, thereby improving the smoothness of the arc surface and making the display effect of the LED display screen better.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An arc adjustment mechanism, characterized in that: It includes a telescopic mechanism and a limiting mechanism, the telescopic mechanism includes a first fixed seat, a first movable member, a second movable member and a second fixed seat, the first end of the first movable member is hinged on the first fixed seat around a first rotation axis, the first end of the second movable member is hinged on the second fixed seat around a second rotation axis, the second end of the first movable member is slidably connected with the second end of the second movable member, the first fixed seat is used to be fixedly connected to the power box, and the second fixed seat is used to be fixedly connected to the box frame; the first rotation axis is parallel to the second rotation axis; the sliding direction of the first movable member and the second movable member is perpendicular to the first rotation axis and the second rotation axis; The limiting mechanism includes a first connecting block, a rotating handle, a rotating sleeve, a first telescopic shaft and a locking mechanism, wherein the first connecting block is fixed to the second movable member, the rotating handle is rotatably connected to the first connecting block, the first end of the rotating sleeve is fixed to the rotating handle, the first telescopic shaft is movably connected to the first end of the inner cavity of the rotating sleeve, and the locking mechanism can temporarily fix the rotating handle to the first connecting block to limit the rotation of the rotating handle; The relative sliding between the first movable member and the second movable member can reduce or increase the distance between the first rotation axis and the second rotation axis to adjust the curvature of the LED unit display screen; The forward rotation of the rotating handle can drive the first telescopic shaft to extend out of the rotating sleeve through the rotating sleeve and combine with the telescopic mechanism to limit the relative sliding of the first movable member and the second movable member, and the arc adjustment mechanism enters a locked state; In the locked state of the arc adjustment mechanism, the reverse rotation of the rotating handle can drive the first telescopic shaft to retract the rotating sleeve through the rotating sleeve and separate from the telescopic mechanism; The first movable member is provided with a guide post, and the second movable member is provided with a third guide groove at a position corresponding to the guide post, and the guide post is slidably connected to the third guide groove; The second movable member includes an upper shell and a lower cover covering the upper shell, the first end of the upper shell is hinged to the second fixed seat, and a accommodating cavity is formed between the second end of the upper shell and the lower cover; a rack is provided on the side of the first movable member facing the lower cover, and a latching tooth matching the rack is provided on the end of the first telescopic shaft close to the first movable member; positive rotation of the rotating handle can drive the first telescopic shaft to extend into the accommodating cavity, so that the latching tooth is engaged with the rack, and the arc adjustment mechanism enters a locked state.

2. The arc adjustment mechanism according to claim 1, characterized in that: The second end of the first movable member is linearly slidably connected to the second end of the second movable member.

3. The arc adjustment mechanism according to claim 2, characterized in that: The second end of the first movable member is slidably connected in the accommodating cavity; The rotating handle is provided with a first through hole axially penetrating the inner cavity of the rotating sleeve, the first connecting block is provided with a second through hole axially penetrating the first through hole, the lower cover is provided with a third through hole axially penetrating the second through hole, and the third through hole is connected to the accommodating cavity.

4. The arc adjustment mechanism according to claim 2, characterized in that: The locking mechanism comprises an elastic member, a gear fixed to the first connecting block and a swing rod hinged to the rotating handle, a locking claw matched with the gear is arranged at the first end of the swing rod, a button is arranged at the second end of the swing rod, and a hinge shaft of the swing rod hinged to the rotating handle is located between the locking tooth and the button; One end of the elastic member is connected to the rotating handle, and the other end of the elastic member is connected to the rocker arm. The elastic force of the elastic member acting on the rocker arm keeps the locking claw engaged with the gear to limit the rotation of the rotating handle; pressing the button can separate the locking claw from the gear.

5. The arc adjustment mechanism according to claim 3, characterized in that: A first spiral guide groove is provided on the outer peripheral wall of the first telescopic shaft, and a first limit pin is provided in the rotating sleeve. The first limit pin is movably provided in the first guide groove.

6. The arc adjustment mechanism according to claim 5, characterized in that: The first telescopic shaft is a stepped shaft, the diameter of the first section of the first telescopic shaft is smaller than the diameter of the second section of the first telescopic shaft, a first spring is sleeved on the first section of the first telescopic shaft, the latch tooth is arranged in the first section of the first telescopic shaft, the first guide groove is arranged in the second section of the first telescopic shaft, and the first telescopic shaft moves in the direction of extending out of the rotating sleeve to compress the first spring when the rotating handle rotates forward.

7. The arc adjustment mechanism according to claim 1, characterized in that: The telescopic mechanism is provided with two, the limiting mechanism further comprises a second connecting block and a second telescopic shaft, the second connecting block is rotatably connected to the second end of the rotating sleeve, the second telescopic shaft is movably connected to the second end of the inner cavity of the rotating sleeve, the second movable part of the first telescopic mechanism is fixedly connected to the first connecting block, and the second movable part of the second telescopic mechanism is fixedly connected to the second connecting block; The forward rotation of the rotating handle can drive the first telescopic shaft to extend from the first end of the rotating sleeve and combine with the first telescopic mechanism through the rotating sleeve, so as to limit the relative sliding of the first movable part of the first telescopic mechanism and the second movable part of the first telescopic mechanism. At the same time, the second telescopic shaft is driven to extend from the second end of the rotating sleeve and combine with the second telescopic mechanism through the rotating sleeve, so as to limit the relative sliding of the first movable part of the second telescopic mechanism and the second movable part of the second telescopic mechanism, and the arc adjustment mechanism enters a locked state; When the arc adjustment mechanism is in a locked state, rotating the rotating handle in the opposite direction can drive the first telescopic shaft to retract the rotating sleeve and separate from the first telescopic mechanism through the rotating sleeve, and at the same time drive the second telescopic shaft to retract the rotating sleeve and separate from the second telescopic mechanism through the rotating sleeve.

8. An LED unit display screen, characterized in that: It comprises the arc adjustment mechanism described in any one of claims 1-7.

9. An LED unit display screen, characterized in that: It comprises an LED display module, a power supply box, a box frame and two arc adjustment mechanisms as described in any one of claims 1 to 7; The first fixed seat of the first arc adjustment mechanism is fixedly connected to the left side of the power box, and the second fixed seat of the first arc adjustment mechanism is fixedly connected to the left side frame of the box frame; the first fixed seat of the second arc adjustment mechanism is fixedly connected to the right side of the power box, and the second fixed seat of the second arc adjustment mechanism is fixedly connected to the right side frame of the box frame.

10. An LED display screen, characterized in that: The LED display screen is assembled from a plurality of LED unit display screens as described in claim 8 or 9.

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