Arc-shaped splicing components, splicing locks and LED display screens

Abstract

The present application relates to an arc-shaped splicing component, a splicing lock and an LED display screen. The arc-shaped splicing component is used for splicing LED boxes, and includes a base, a knob, a transmission assembly and an adjustment tooth block. The base is fixed on the box frame of the LED box; the knob is connected to the adjustment tooth block through the transmission assembly, and the transmission assembly is fixed relative to the box frame through the base. When the knob is rotated, the adjustment tooth block is tilted accordingly. The splicing piece on the other LED box is fixedly connected to the adjustment tooth block. When the adjustment tooth block is tilted, the spacing and angle of the two LED box frames change. The splicing lock includes an arc-shaped splicing component, and the LED display screen includes a splicing lock. The arc-shaped splicing component realizes the compatibility of plane splicing and arc-shaped splicing. The switching of splicing only needs to be done by adjusting the rotation direction and rotation angle of the knob. The adjustment accuracy is high, the adjustment method is simple, and the operability is high.

Description

Technical Field

[0001] The present application relates to the field of LED display screens, and in particular to an arc-shaped splicing component, a splicing lock, and an LED display screen. Background Art

[0002] At present, LED display screens are generally composed of multiple display screen units or display screen unit boxes. In order to expand the application range of the product, the box splicing must achieve both plane splicing and arc splicing. With the advancement of technology and the expansion of application fields, especially for LED display screens used in the rental field, it is required to be easy to operate, fast, stable and reliable.

[0003] There are two traditional ways to achieve arc splicing: one is through the arc connection plate, and the other is through the angle lock. The arc connection plate and screws can only achieve fixed angle connection, and the operation is time-consuming and labor-intensive, which is not suitable for LED display screens in the rental field; the traditional angle lock relies on the spring to bounce the limit teeth to adjust the angle during the angle adjustment process. During long-term use, the limit teeth will fail to bounce due to spring failure. Therefore, how to achieve better compatibility between plane splicing and arc splicing is still a problem that has been explored in the field of LED display splicing. Summary of the invention

[0004] Based on this, it is necessary to provide a curved splicing component, a splicing lock and an LED display screen in order to solve the problem of how the LED display screen can achieve better compatibility between plane splicing and arc splicing.

[0005] In a first aspect, the present application provides an arc-shaped splicing component for splicing LED boxes, comprising a base, a knob, a transmission assembly and an adjusting gear block, wherein:

[0006] The base is fixed on the box frame of the LED box;

[0007] The knob is connected to the adjusting tooth block via the transmission assembly, and the transmission assembly is fixed relative to the box frame via the base. When the knob is rotated, the adjusting tooth block is tilted accordingly. The splicing piece on the other LED box is fixedly connected to the adjusting tooth block. When the adjusting tooth block is tilted, the spacing and angle between the two LED box frames are changed.

[0008] In one of the embodiments, a track groove is provided on the base, and the adjusting tooth block is at least partially embedded in the track groove. When the knob is rotated, the adjusting tooth block tilts and moves in the track groove.

[0009] In one embodiment, the knob includes an operating portion and a connecting portion, wherein the connecting portion is fixedly connected to the operating portion, wherein the operating portion is used for an operator to operate, the connecting portion is fixedly connected to the transmission assembly, and a scale groove is provided on the connecting portion;

[0010] It also includes a stopper, which is arranged corresponding to the scale groove and fixed on the box frame. The stopper is at least partially embedded in the scale groove, and the knob can rotate relative to the stopper to enable the stopper to move in the scale groove.

[0011] In one embodiment, the scale groove includes a moving part and a scale part, the scale part is connected to the moving part, and when the stopper is embedded in the scale part, the rotation of the knob is restricted.

[0012] In one of the embodiments, the knob and the adjusting gear block are exposed from different end surfaces of the box frame respectively, and the transmission assembly can realize the conversion of forces in two different directions.

[0013] In one embodiment, the transmission assembly includes a first gear set and a second gear set, and the first gear set and the second gear set are meshed with each other to achieve transmission, wherein the first gear set includes a first bevel gear, and the second gear set includes a second bevel gear and a secondary transmission member, and the secondary transmission member is fixedly connected to the second bevel gear, the axis of the second bevel gear is at a preset angle with the axis of the first bevel gear, and the second bevel gear is meshed with the first bevel gear, and the secondary transmission member is meshed with the adjusting gear block.

[0014] In one embodiment, the secondary transmission member is a cylindrical gear, and the adjusting gear block is provided with a sawtooth structure, and is meshed with the secondary transmission member through the sawtooth structure;

[0015] The adjusting tooth block is provided with an arc surface, and the sawtooth structure is provided on the arc surface.

[0016] In one embodiment, a groove is provided on the adjusting tooth block, a hanging rod is provided in the groove, and the hanging rod is used to fix another splicing member that is engaged with the arc-shaped splicing member;

[0017] The length extension direction of the groove has a preset angle with the abutment surfaces of the two mutually spliced ​​boxes.

[0018] The arc-shaped splicing component is compatible with plane splicing and arc-shaped splicing by setting a knob, a transmission assembly and an adjustment tooth block. When the knob is turned, the knob drives the adjustment tooth block to tilt through the transmission assembly. The other splicing component is fixed on the adjustment tooth block. When the adjustment tooth block moves, the distance between the two boxes is changed, and the distance between the two boxes can be adjusted accordingly, so as to splice them into a preset angle. The switching of splicing only requires adjusting the rotation direction and rotation angle of the knob. The adjustment accuracy is high, the adjustment method is simple, and the operability is high.

[0019] A second aspect of the present application provides a splicing lock, comprising a first splicing piece and a second splicing piece, wherein one of the first splicing piece and the second splicing piece is any of the arc-shaped splicing components described above, and the other comprises a hook and is hooked to the arc-shaped splicing component by the hook.

[0020] Since the splicing lock buckle includes an arc-shaped splicing component, the splicing lock buckle also has the beneficial effects of the arc-shaped splicing component.

[0021] At the same time, since the adjustment structure is arranged on the arc-shaped splicing component when adjusting the curvature, the adjustment and locking are integrated on one splicing piece, so that the angle adjustment can be achieved by operating one splicing piece without operating different splicing pieces on two boxes.

[0022] A third aspect of the present application provides an LED display screen, comprising at least two LED boxes and a splicing lock, wherein the LED boxes are spliced ​​and fixed to each other via the splicing lock, and the splicing lock is the splicing lock mentioned above.

[0023] Since the LED display screen includes a splicing lock, and the splicing lock includes an arc-shaped splicing component, the LED display screen also has the same beneficial effects as the arc-shaped splicing component and the splicing lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of an arc-shaped splicing component according to an embodiment of the present application;

[0025] Figure 2 This is a schematic structural diagram of the other side of the arc-shaped splicing component of an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the exploded structure of an arc-shaped splicing component according to an embodiment of the present application;

[0027] Figure 4 This is a schematic structural diagram of a knob of an arc-shaped splicing component according to an embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the matching structure of the knob and the transmission assembly of the arc-shaped splicing component according to one embodiment of the present application;

[0029] Figure 6 This is a schematic structural diagram of an adjusting tooth block of an arc-shaped splicing component according to an embodiment of the present application;

[0030] Figure 7 This is a schematic cross-sectional structure diagram of an LED display screen according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] See also Figure 1 and Figure 2 , a structural schematic diagram of an arc-shaped splicing component 10 of an embodiment of the present application is shown by way of example. The arc-shaped splicing component 10 may include a base 110, a knob 120, a transmission assembly 130 and an adjusting tooth block 140. The base 110 is fixed on the box frame of the LED box. The knob 120 is connected to the adjusting tooth block 140 through the transmission assembly 130. The transmission assembly 130 is fixed relative to the box frame through the base 110. When the knob 120 is rotated, the adjusting tooth block 140 is tilted accordingly. The splicing piece on the other LED box is fixedly connected to the adjusting tooth block 140. When the adjusting tooth block 140 is tilted, the spacing and angle between the two LED box frames change, thereby realizing the curvature adjustment.

[0035] It can be understood that a receiving groove can be provided on the box frame of the LED box, and the arc-shaped splicing component 10 can be received in the receiving groove, so that the arc-shaped splicing component 10 is not visible to the outside (see Figure 7 ), on the one hand, it protects the arc-shaped splicing piece 10, and on the other hand, it can also avoid misoperation.

[0036] The base 110 is arranged on the box frame and fixedly connected to the box frame, whereby the arc splicing component 10 is fixed to the box frame. In order to facilitate the replacement of the arc splicing component 10, the base 110 can be removed from the box frame, for example, the base 110 can be fixed to the box frame by screws.

[0037] See also Figure 1 and Figure 3 In one or more embodiments, a track groove 110a is provided on the base 110, and the adjusting tooth block 140 is at least partially embedded in the track groove 110a. When the knob 120 is rotated, the adjusting tooth block 140 tilts and moves in the track groove 110a. By providing the track groove 110a, the track groove 110a defines the moving track of the adjusting tooth block 140. On the one hand, the accuracy of the arc adjustment is controllable, and on the other hand, the adjusting tooth block 140 is also limited to prevent the adjusting tooth block 140 from being disengaged from the transmission assembly 130 during the tilting process.

[0038] The knob 120 is used for the operator to manipulate. The operator controls the arc-shaped splicing component 10 by manipulating the knob 120, thereby changing the splicing angle between two LED boxes using the arc-shaped splicing component 10. For ease of manipulation, when the arc-shaped splicing component 10 is assembled on the box frame, the knob 120 can be at least partially exposed outside the LED box.

[0039] See also Figure 4 and Figure 5 The knob 120 may include an operating portion 121 and a connecting portion 123, wherein the connecting portion 123 is fixedly connected to the operating portion 121, wherein the operating portion 121 is used for operation by an operator, and the connecting portion 123 is fixedly connected to the transmission assembly 130. When the operating portion 121 rotates under the action of an external force, the connecting portion 123 is driven to rotate, and then the transmission assembly 130 is driven to rotate through the connecting portion 123.

[0040] Please continue reading Figure 3 and Figure 4A scale groove 125 may be provided on the connecting portion 123, and a stopper 150 is further provided on the arc-shaped splicing component 10 corresponding to the scale groove 125. The stopper 150 is fixed to the box frame and at least partially embedded in the scale groove 125. The knob 120 can rotate relative to the stopper 150 so that the stopper 150 can move in the scale groove 125. The angle can be adjusted and fixed by moving the stopper 150 in the scale groove 125.

[0041] In one or more embodiments, precise adjustment of multiple preset angles can be achieved by setting the scale groove 125. Figure 4 As shown, in some embodiments, the scale groove 125 may include a moving part 1251 and a scale part 1253, the scale part 1253 is connected to the moving part 1251, and when the stopper 150 is embedded in the scale part 1253, the rotation of the knob 120 is limited. Thus, multiple scale parts 1253 can be provided to correspond to multiple different splicing arcs. In the illustrated embodiment, multiple scale parts 1253 are provided on one side of the moving part 1251. It can be understood that scale parts 1253 can be provided on both sides of the moving part 1251. It is only necessary to change the moving direction of the knob 120 relative to the stopper 150 accordingly to embed it into the scale parts 1253 on different sides. It can be understood that in order to support the most precise arc splicing as possible, the two adjacent scale parts 1253 on both sides of the moving part 1251 are no longer on the same straight line, so as to correspond to different splicing arcs.

[0042] See also Figure 3 The stopper 150 is provided with a boss 151, which is embedded in the scale groove 125. When the knob 120 moves, the boss 151 moves in the scale groove 125. In a specific embodiment, the box frame is provided with a through hole corresponding to the connection portion 123 of the knob 120, and the accommodating groove is connected to the outside through the through hole. The stopper 150 is provided in the box frame and corresponds to the through hole, and the boss 151 extends into the through hole, so that the knob 120 can be limited by the stopper 150.

[0043] In some embodiments, the transmission assembly 130 is fixedly connected to the base 110, and the knob 120 can rotate circumferentially under the action of external force, and move in the axial direction of the knob 120 relative to the stopper 150. When the knob 120 moves in the axial direction relative to the stopper 150, it approaches or moves away from the transmission assembly 130. Specifically, in the illustrated embodiment, a groove 127 can be provided on the knob 120, and the transmission assembly 130 is at least partially embedded in the groove 127. The arc-shaped splicing component 10 can also include an elastic member 160, which is provided in the groove 127. The transmission assembly 130 and the knob 120 are connected through the elastic member 160. When the knob 120 is pressed, the elastic member 160 is deformed. When the knob 120 is pressed again, the elastic member 160 provides a restoring force for the reset of the knob 120. It can be understood that in order to drive the linkage of the transmission assembly 130 when the knob 120 rotates, the groove 127 has at least one edge. For example, the groove 127 can be a regular groove with a polygonal cross section, or an irregular groove with a circular cross section having a cut-off portion of an arc. In the illustrated embodiment, the groove 127 is an irregular groove with a circular cross section having a cut-off portion of an arc.

[0044] For the convenience of manipulation, the knob 120 and the adjusting tooth block 140 are exposed from different end faces of the box frame, respectively. The adjusting tooth block 140 is located between two adjacent box frames, so as to facilitate the fixed splicing of the two adjacent box frames. If the knob 120 is set to be on the same end face as the adjusting tooth block 140, it will be disadvantageous for the manipulation of the knob 120. Therefore, the knob 120 can be exposed from another end face of the box frame. For example, the knob 120 is exposed from the back of the box frame, and the back side corresponds to the display surface, which is used to install the LED display module.

[0045] Since the knob 120 and the adjusting tooth block 140 are exposed from different end surfaces of the box frame, respectively, the transmission assembly 130 can realize the conversion of forces in two different directions, so as to drive the adjusting tooth block 140 to tilt through the rotation of the knob 120 .

[0046] See also Figures 1 to 3 ,and Figure 5In one or more embodiments, the transmission assembly 130 may include a first gear set 131 and a second gear set 133, the first gear set 131 and the second gear set 133 are meshed with each other to achieve transmission, wherein the first gear set 131 includes a first bevel gear 1311, the second gear set 133 includes a second bevel gear 1331 and a secondary transmission member 1333, the secondary transmission member 1333 is fixedly connected to the second bevel gear 1331, the axis of the second bevel gear 1331 and the axis of the first bevel gear 1311 form a preset angle, and the second bevel gear 1331 is meshed with the first bevel gear 1311, and the secondary transmission member 1333 is meshed with the adjustment gear block 140. The rotation of the knob 120 drives the rotation of the first bevel gear 1311, and the first bevel gear 1311 drives the rotation of the second bevel gear 1331 to achieve the direction adjustment of the driving force, and when the second bevel gear 1331 rotates, the adjustment gear block 140 is driven to tilt through the secondary transmission member 1333.

[0047] exist Figure 5 In the illustrated embodiment, the secondary transmission member 1333 is a cylindrical gear, which is fixedly connected to the second bevel gear 1331. When the second bevel gear 1331 rotates, the cylindrical gear is driven to rotate; the cylindrical gear is meshed with the adjusting tooth block 140, and when the cylindrical gear rotates, the adjusting tooth block 140 is driven to tilt through the meshing force; when the adjusting tooth block 140 tilts, it moves along the direction of the track groove 110a. The cylindrical gear can be coaxially arranged with the second bevel gear 1331, so that the secondary transmission member 1333 can achieve relatively uniform adjustment. It can be understood that the cylindrical gear can also be non-coaxially arranged with the second bevel gear 1331, and it is only necessary to make the shape of the track groove 110a match the moving track of the adjusting tooth block 140. At this time, the arc splicing component 10 is more suitable for splicing between boxes spliced ​​in a single direction, for example, only the inner arc splicing that is concave forward, or the outer arc splicing that is convex forward.

[0048] It is understandable that the secondary transmission member 1333 is not limited to cylindrical gears, but can also be other transmission components such as connecting rods, gear sets, etc., as long as the driving force transmission between the second bevel gear 1331 and the adjusting gear block 140 can be achieved.

[0049] See also Figure 3 and Figure 6, a sawtooth structure 141 is provided on the adjusting tooth block 140, and meshes with the secondary transmission member 1333 through the sawtooth structure 141. In one or more embodiments, an arc surface 140a is provided on the adjusting tooth block 140, and the sawtooth structure 141 is provided on the arc surface 140a, so that when the driving force of the secondary transmission member 1333 acts on the sawtooth structure 141, it can push the adjusting tooth block 140 to tilt at a rounded angle and rotate along an arc instead of moving along a straight line. It can be understood that the curvature of the arc surface 140a is adapted to the curvature of the track groove 110a, so that the movement of the adjusting tooth block 140 during tilting is consistent with the track groove 110a. For example, when the secondary transmission member 1333 is a cylindrical gear, the curvatures of the two can be equal.

[0050] The adjusting tooth block 140 is also provided with a ridge 143, which is provided on one side of the adjusting tooth block 140 and at least partially embedded in the track groove 110a of the base 110, so that the vertical movement of the adjusting tooth block 140 can be limited by the ridge 143 and the secondary transmission member to prevent the adjusting tooth block 140 from loosening. At the same time, the adjusting tooth block 140 is not directly fixed to the box body, but is fixed by the positioning of the secondary transmission member 1333 and the track groove 110a, which facilitates the tilting of the adjusting tooth block 140 and is conducive to the flexible adjustment of the splicing angle.

[0051] A hanging rod 145 is also provided on the adjusting tooth block 140, and the hanging rod 145 is used to fix another splicing piece that is engaged with the arc-shaped splicing component 10. When the other splicing piece is fixed on the hanging rod 145, if the adjusting tooth block 140 is tilted, the relative distance between the adjusting tooth block 140 and the other splicing piece is slightly changed, thereby changing the gap between the box body where the arc-shaped splicing component 10 is located and the box body where the other splicing piece is located, and the splicing curvature between the two boxes can be changed.

[0052] exist Figure 6 In the embodiment shown, a groove 140b is provided on the adjusting tooth block 140, and a hanging rod 145 is provided in the groove 140b. The hook on another splicing piece can slide along the groove 140b and finally be clamped on the hanging rod 145. Of course, the setting of the hanging rod 145 is not limited to Figure 6 The embodiment in the figure is conducive to reducing the matching space between the other splicing piece and the adjusting tooth block 140.

[0053] The length extension direction L of the groove 140b has a preset angle with the contact surface of the two mutually spliced ​​boxes, but is not parallel. In other words, the direction of the pulling force of the hook of the other splicing piece has a preset angle with the sawtooth strip of the sawtooth structure 141, for example, perpendicular to each other. Therefore, when the spliced ​​boxes are hooked on the hanging rod 145 through the splicing piece, due to the preset angle, the secondary transmission member 1333 can prevent the movement of the adjustment tooth block 140, thereby preventing the other splicing piece from pulling the adjustment tooth block 140 out of the receiving groove when hooking the hanging rod 145.

[0054] When the arc-shaped splicing component 10 is used to splice two boxes, the arc-shaped splicing component 10 is assembled to the box frame of one of the boxes, and then the hook of the splicing piece on the other box is engaged with the arc-shaped splicing component 10. At this time, the splicing of the two boxes is completed. Assuming that the two boxes are in a plane splicing state at this time, after the arc-shaped splicing component 10 is fixed to the other splicing piece, the display surfaces of the two boxes are on the same plane. At this time, the ridge 143 of the adjustment tooth block 140 is in the middle of the track groove 110a, and can move to the two ends of the track groove 110a under the action of an external driving force. The specific moving direction is determined by the driving force; the boss 151 of the stopper 150 is embedded in the middle of the scale groove 125 on the knob 120, and is opposite to one of the scale parts 1253. At this time, the knob 120 is operated to make the boss 151 of the stopper 150 snap into the scale part 1253, and the fixing of the plane splicing angle is completed. On the basis of plane splicing, if arc splicing is required, first move the knob 120 to make the boss 151 of the stopper 150 disengage from the scale portion 1253 and enter the moving portion 1251, and turn the knob 120. The knob 120 drives the first bevel gear 1311 to rotate, and the first bevel gear 1311 drives the secondary transmission member 1333 (a cylindrical gear in the illustrated embodiment) to rotate through the second bevel gear 1331. When the cylindrical gear rotates, the adjustment gear block 140 is driven to tilt, and the ridge 143 moves in the track groove 110a. By adjusting the rotation direction of the knob 120, the inner arc splicing and the outer arc splicing can be switched. By adjusting the rotation angle of the knob 120, the splicing angle of the two boxes can be adjusted. When adjusted to the desired angle, the boss 151 of the stopper 150 corresponds to the scale part 1253. Move the knob 120 to make the boss 151 embedded in the scale part 1253, thereby fixing the splicing angle and achieving the desired angle of arc splicing.

[0055] The arc-shaped splicing component is compatible with plane splicing and arc-shaped splicing by setting a knob 120, a transmission assembly 130 and an adjustment tooth block 140. By turning the knob 120, the knob 120 drives the adjustment tooth block 140 to tilt through the transmission assembly 130. The other splicing component is fixed on the adjustment tooth block 140. When the adjustment tooth block 140 moves, the spacing between the two boxes is changed, and the spacing between the two boxes can be adjusted accordingly, so as to splice them into a preset angle. The switching of the splicing only requires adjusting the rotation direction and rotation angle of the knob 120. The adjustment accuracy is high, the adjustment method is simple, and the operability is high.

[0056] An embodiment of the present application also provides a splicing lock buckle, which includes a first splicing piece and a second splicing piece, one of the first splicing piece and the second splicing piece is the arc-shaped splicing component 10 described in any of the above embodiments, and the other includes a hook and is hooked on the arc-shaped splicing component 10 through the hook.

[0057] Since the splicing lock buckle includes the arc-shaped splicing component 10, the splicing lock buckle also has the beneficial effects of the arc-shaped splicing component 10.

[0058] At the same time, since the adjustment structure is arranged on the arc-shaped splicing component when adjusting the curvature, the adjustment and locking are integrated on one splicing piece, so that the angle adjustment can be achieved by operating one splicing piece without operating different splicing pieces on two boxes.

[0059] See also Figure 7 The present application also provides an LED display screen 20, comprising at least two LED boxes and a splicing lock, wherein the LED boxes are spliced ​​and fixed to each other through the splicing lock, and the splicing lock is the splicing lock described in the above embodiment.

[0060] Since the LED display screen includes a splicing lock, and the splicing lock includes an arc-shaped splicing component, the LED display screen also has the same beneficial effects as the arc-shaped splicing component and the splicing lock.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An arc-shaped splicing component for splicing LED boxes, characterized in that: It includes a base, a knob, a transmission assembly and an adjusting gear block, wherein: The base is fixed on the box frame of the LED box; The knob is connected to the adjusting tooth block through the transmission assembly, and the transmission assembly is fixed relative to the box frame through the base. When the knob is rotated, the adjusting tooth block is tilted accordingly, and the splicing piece on the other LED box is fixedly connected to the adjusting tooth block. When the adjusting tooth block is tilted, the spacing and angle of the two LED box frames are changed; a track groove is provided on the base, and the adjusting tooth block is at least partially embedded in the track groove. When the knob is rotated, the adjusting tooth block is tilted and moves in the track groove; the knob includes an operating part and a connecting part, and the connecting part is fixedly connected to the operating part, wherein the operating part is used for the operator to operate, and the connecting part is fixedly connected to the transmission assembly, and a scale groove is provided on the connecting part; It also includes a stopper, which is arranged corresponding to the scale groove and fixed on the box frame, and the stopper is at least partially embedded in the scale groove, and the knob can rotate relative to the stopper so that the stopper can move in the scale groove; the scale groove includes a moving part and a scale part, and the scale part is connected to the moving part. When the stopper is embedded in the scale part, the rotation of the knob is restricted; the knob and the adjusting tooth block are respectively exposed from different end faces of the box frame, and the transmission assembly can realize the conversion of forces in two different directions; the transmission assembly includes a first A gear set and a second gear set, wherein the first gear set and the second gear set are meshed with each other to achieve transmission, wherein the first gear set includes a first bevel gear, the second gear set includes a second bevel gear and a secondary transmission member, the secondary transmission member is fixedly connected to the second bevel gear, the axis of the second bevel gear and the axis of the first bevel gear form a preset angle, and the second bevel gear is meshed with the first bevel gear, and the secondary transmission member is meshed with the adjusting tooth block; the secondary transmission member is a cylindrical gear, the adjusting tooth block is provided with a sawtooth structure, and is meshed with the secondary transmission member through the sawtooth structure; The adjusting tooth block is provided with an arc surface, and the sawtooth structure is provided on the arc surface.

2. The arc-shaped splicing component according to claim 1, characterized in that: The adjusting tooth block is provided with a groove, and a hanging rod is provided in the groove, and the hanging rod is used to fix another splicing piece that is engaged with the arc-shaped splicing component; The length extension direction of the groove has a preset angle with the abutment surfaces of the two mutually spliced ​​boxes.

3. A splicing lock buckle, comprising a first splicing piece and a second splicing piece, characterized in that: One of the first splicing piece and the second splicing piece is the arc-shaped splicing component according to any one of claims 1 to 2, and the other comprises a hook and is hooked to the arc-shaped splicing component by the hook.

4. An LED display screen, comprising at least two LED boxes and a splicing lock, wherein the LED boxes are spliced ​​and fixed to each other by the splicing lock, characterized in that: The splicing lock buckle is the splicing lock buckle described in claim 3.

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