LED display screen high-precision radian lock device and LED display screen connecting method

Abstract

The invention provides an LED display screen high-precision radian lock device and a connecting method. A first fixing part of a first lock body comprises a locking cavity for containing a radian lock body, and the radian lock body is contained in the locking cavity in a replaceable mode and connected with a second lock body in a locked mode or unlocked from the second lock body; the second lock body comprises a second fixing part and a second locking piece; during locking, the second locking piece moves towards the radian lock body direction of the first lock body along the inserting hole of the second fixing part through matching of the limiting groove and the limiting piece, and after a lock head at the end of the lock rod enters the locking position of the radian lock body, the lock rod is rotated to enable the lock head to be tightly attached to the locking hole of the radian lock body. And during rotation, the lock rod rotates relative to the lock cylinder through the threaded structure to tension the whole radian lock body towards the second lock body, so that the radian lock body is in close contact with the contact surface of the locking cavity of the first lock body, and a transverse locking surface perpendicular to the direction of the lock rod is formed. The lock body is compact and precise in structure and convenient and fast to operate, and the maximum transverse locking face can be utilized to the maximum extent.

Description

Technical Field

[0001] The invention relates to a high-precision arc locking device and a connection method for an LED display screen, and belongs to the technical field of LED display screens. Background Art

[0002] With the growing demand for LED display rentals, especially during large-scale events, the market demand for large, high-definition LED displays has increased significantly. High-definition displays require smaller spacing between light points, and also place higher demands on the installation accuracy of arc locks.

[0003] The left and right arc locks of existing LED display cabinets mostly adopt a polyhedron structure. Due to the small contact area of ​​this type of arc lock with a polyhedron structure, after being installed on the LED display and forming a large assembled display screen, the stability is easily deteriorated when subjected to huge external pressure or tension, resulting in a decrease in the flatness of the display screen, affecting the display effect. In addition, the fixing method of the arc lock with a polyhedron structure requires the LED display cabinet to be equipped with an additional support structure and increases the thickness of the cabinet, thereby comprehensively increasing the overall cost of the LED display screen. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a high-precision arc locking device and connection method for an LED display screen, which has a larger contact area and occupies less space on the vertical surface of the LED box. According to an embodiment of the present invention, a first solution is provided: a high-precision arc locking device for an LED display screen, comprising a first lock body and a second lock body; The first lock body includes a first fixing portion and a curved lock body, wherein the first fixing portion is fixed to a first side of the LED display housing, and the first fixing portion includes a locking cavity for accommodating the curved lock body, and the curved lock body can be replaced and accommodated in the locking cavity and locked or unlocked with the second lock body; The second lock body includes a second fixing portion and a second locking member, wherein the second fixing portion is fixed to the second side of the LED display box, and the second locking member includes a lock cylinder and a locking rod. The second fixing portion is provided with an insertion hole facing the first lock body, the lock cylinder is arranged in the insertion hole, and the locking rod is arranged in the lock cylinder through a threaded structure; The second fixing portion is provided with a limiting member in the insertion hole, and a limiting groove is provided on the surface of the lock cylinder to cooperate with the limiting member. The long side direction of the limiting groove is consistent with the hole axis direction of the insertion hole facing the first lock body, so that when the lock cylinder is inserted into the insertion hole, the lock cylinder can only move along the long side direction of the limiting groove and cannot rotate relative to the second fixing portion; When locked, the second locking piece moves along the insertion hole of the second fixing part toward the arc lock body direction of the first lock body through the cooperation of the limit groove and the limit piece. After the lock head at the end of the locking rod enters the locking position of the arc lock body, the locking rod is rotated so that the lock head is tightly fitted on the locking hole of the arc lock body. During rotation, the locking rod rotates relative to the lock cylinder through the threaded structure to tighten the arc lock body as a whole toward the second lock body direction so that the contact surface of the arc lock body is in close contact with the locking cavity of the first lock body and a transverse locking surface perpendicular to the direction of the locking rod is formed.

[0005] Furthermore, the arc lock body is an I-shaped structure, including a straight piece, an oblique piece and an intermediate piece. The intermediate piece is provided with a core hole, and the lock core can be inserted into the lock hole and fixed in the lock hole. A locking hole is provided in the middle position of the lock core, and the straight piece, the oblique piece and the intermediate piece have a through lock hole, and the locking hole is exposed in the lock hole.

[0006] Furthermore, the locking cavity of the first fixing part is a semi-open cavity, and the opening of the semi-open cavity includes two protrusions, each protrusion is adapted to the I-groove at the middle piece of the curved lock body, and when the curved lock body is inserted into the locking cavity of the first fixing part, the I-groove of the middle piece is inserted into and clamped on the two protrusions of the opening of the semi-open cavity, the oblique piece is inserted into the semi-open cavity and the straight piece is placed on the outside, or the straight piece is inserted into the semi-open cavity and the oblique piece is placed on the outside.

[0007] Furthermore, the straight piece includes a first straight connecting surface, which is perpendicular to the bottom surface of the curved lock body, and the oblique piece includes a second oblique connecting surface, which forms an angle with the bottom surface of the curved lock body.

[0008] Furthermore, when box A and box B are fixedly connected, the oblique piece of the arc lock body is inserted into the semi-open cavity and the straight piece is placed outside. When the locking rod and the lock head of the second locking piece lock the locking hole of the lock cylinder, the first straight connecting surface of the straight piece is in close contact with the second connecting surface of the second fixing part, and box A and box B are horizontally connected. Or, the straight piece of the curved lock body is inserted into the semi-open cavity and the oblique piece is placed on the outside. When the locking rod and lock head of the second locking piece lock the locking hole of the lock cylinder, the first oblique connecting surface of the oblique piece is in close contact with the second connecting surface of the second fixing part and the box A and the box B are connected at the inclination angle of the first oblique connecting surface.

[0009] Furthermore, the included angle between the second oblique connecting surface and the bottom surface of the curved lock body can be selected from the following options: 95°, 92.5°, 90°, 87.5°, and 85°.

[0010] Furthermore, the oblique piece of the arc lock body is inserted into the semi-open cavity and the straight piece is placed outside. When the locking rod and the lock head of the second locking piece lock the locking hole of the lock cylinder, the two oblique force surfaces of the oblique piece facing the middle piece act closely with the two protrusions of the first fixing part. Or, the straight piece of the arc lock body is inserted into the semi-open cavity and the oblique piece is placed on the outside. When the locking rod and lock head of the second locking piece lock the locking hole of the lock cylinder, the two straight force surfaces of the straight piece facing the middle piece act tightly against the two protrusions of the first fixing part.

[0011] Furthermore, when the second locking piece is fully inserted into the socket of the second fixing part, the lock head is inserted into the locking hole of the lock core, and there is a first gap between the lock head and the lock core. When the locking rod rotates a locking distance relative to the lock cylinder through the threaded structure, the locking rod is displaced a second distance relative to the lock cylinder, and the second distance is ≥ the first gap.

[0012] Furthermore, the locking hole of the lock core is an elongated hole, and the lock head is an elongated block that can pass through the elongated hole. After passing through the elongated hole, the lock head rotates so that the lock head and the locking hole intersect and cannot be separated.

[0013] According to the embodiment of the present invention, using the high-precision arc locking device for LED display screens in the first solution provided by the present invention, a second solution is provided: A method for connecting an LED display screen, comprising: Get cabinets A and B to be spliced, and select the model of the arc lock body according to the splicing angle of cabinets A and B; Install the selected arc lock body into the locking cavity of the first fixing part of the box A according to the splicing angle requirements, and fix the arc lock body with the knob screw; Place box A and box B side by side; Push the second locking piece of the second lock body of box B into the lock hole of box A. When the lock head passes through the locking hole of the lock cylinder, it enters the locked position. You only need to rotate the lock rod so that the lock head fits tightly on the locking hole of the curved lock body. When the lock rod is rotated, the lock rod rotates relative to the lock cylinder through the threaded structure to pull the curved lock body as a whole toward the second lock body, so that the contact surface of the curved lock body and the locking cavity of the first lock body are in close contact and form a transverse locking surface perpendicular to the direction of the lock rod; Press the lock handle of the second lock body of box B downward and rotate it to reach the locking limit.

[0014] Compared with the existing technology, the technical solution provided by the present application has the following unique beneficial effects: the present application proposes a new arc lock device, the lock body structure is compact and precise, the operation is convenient and quick, and in particular, the overall height is greatly reduced compared with the traditional lock body, with only the height of one arc lock body, which greatly reduces the overall thickness of the LED box during installation and transportation; the contact surface of the traditional connecting lock is non-perpendicular to the two boxes, and the contact area of ​​the arc lock with a polyhedron structure is small, while the contact surface of the arc lock body of the present application is vertical and the contact area is maximized, thereby maximizing the firmness of the adjacent LED display boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] in: Figure 1 This is a schematic structural diagram of a high-precision arc locking device for an LED display screen in one embodiment; Figure 2 is a schematic structural diagram of a second locking member in one embodiment; Figure 3 A schematic diagram of the structure of the arc lock body in one embodiment Figure 1 ; Figure 4 A schematic diagram of the structure of the arc lock body in one embodiment Figure 2 ; Figure 5 A schematic diagram of the structure of a curved lock body in one embodiment Figure 3 ; Figure 6 This is a connection diagram of a high-precision arc locking device for an LED display screen in one embodiment; Figure 7 Schematic diagram of the position of the high-precision arc lock device of the LED display screen on the box B in one embodiment.

[0017] Reference numerals: 10 - first lock body; 11 - first fixing portion; 111 - locking cavity; 12 - arc lock body; 121 - straight piece; 122 - oblique piece; 123 - middle piece; 124 - oblique force surface; 125 - core hole; 126 - lock hole; 127 - limit hole; 128 - positioning column; 1221 - first oblique connecting surface; 1211 - first straight connecting surface; 1291 - lock hole; 1292 - pin hole; 1293 - pin body; 20 - second lock body; 21 - second fixing portion; 22 - second locking member; 23 - second connecting surface; 221 - lock cylinder; 222 - lock rod; 223 - lock head; 224 - limiting groove; 225 - lock handle; 226 - trigger; 31-Box A; 32-Box B. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0019] Example 1 The technical problem solved by this embodiment is that the left and right arc locks of the existing LED display box mostly adopt a polyhedron structure. Due to the small contact area of ​​this type of arc lock with a polyhedron structure, after being installed on the LED display screen and forming a large assembled display screen, the stability is easily deteriorated when subjected to huge external pressure or tension, resulting in a decrease in the flatness of the display screen, affecting the picture display effect. In addition, the fixing method of the arc lock with a polyhedron structure requires the LED display screen box to be provided with an additional supporting structure and increases the thickness of the box, thereby comprehensively increasing the overall cost of the LED display screen.

[0020] Specifically, the polyhedron structure of the Arc Lock refers to a traditional Arc Lock constructed from multiple flat or irregularly curved surfaces. This multifaceted prism-like shape can accommodate various angles of connection. The contact mechanism is primarily point / line contact, supplemented by surface contact. When the Arc Lock is attached to the cabinet, only a portion of the flat surfaces make contact, while the remaining untouched surfaces create a gap with the cabinet's sides. Therefore, the effective contact area of ​​the polyhedron structure accounts for only 30%-50% of the total lateral area of ​​the Arc Lock, depending on the number of facets and the angle of the design. This small contact area directly affects the uniformity of force applied and the amount of friction during locking. When the LED cabinet is very heavy, localized stress points can easily deform due to excessive pressure when subjected to its own weight, vibration, external impact, or external forces, leading to loosening or misalignment between the Arc Lock and the cabinet. Furthermore, the small contact area reduces friction between the Arc Lock and the cabinet, making it less effective at resisting lateral or vertical displacement. When the two cabinets are joined, even relatively small external forces can widen the gap between the cabinets.

[0021] Therefore, the core technical problem solved by this arc lock device is: how to redesign the arc lock connected to the LED box to maximize the contact area and reasonably set the contact surface perpendicular to the box surface to maximize the use of the maximum contact area.

[0022] The second core technical problem solved by this arc lock device is that it changes the traditional lock body shape. The height of the traditional lock body + lock handle 225 is the height of the arc lock device, so the overall height is relatively high, resulting in a larger overall volume of the LED display to be installed and transported.

[0023] In order to solve the above technical problems, this embodiment provides a high-precision arc locking device for an LED display screen, such as Figure 1 、 Figure 6 As shown, it includes a first lock body 10 and a second lock body 20; The first lock body 10 includes a first fixing portion 11 and a curved lock body 12. The first fixing portion 11 is fixed to the first side of the LED display box. Figure 7 As shown, the first fixing portion 11 includes a locking cavity 111 for accommodating the arc lock body 12. The arc lock body 12 can be replaced and accommodated in the locking cavity 111 and locked or unlocked with the second lock body 20. The second lock body 20 includes a second fixing portion 21 and a second locking member 22. The second fixing portion 21 is fixed to the second side of the LED display box. Figure 7 As shown, the second locking member 22 includes a lock cylinder 221 and a lock rod 222. The second fixing portion 21 is provided with an insertion hole facing the first lock body 10. The lock cylinder 221 is disposed in the insertion hole, and the lock rod 222 is disposed in the lock cylinder 221 through a threaded structure. like Figure 2 As shown, the second fixing portion 21 is provided with a limiting member in the insertion hole, and the surface of the lock cylinder 221 is provided with a limiting groove 224 that cooperates with the limiting member. The long side direction of the limiting groove 224 is consistent with the hole axis direction of the insertion hole facing the first lock body 10, so that when the lock cylinder 221 is inserted into the insertion hole, the lock cylinder 221 can only move along the long side direction of the limiting groove 224 and cannot rotate relative to the second fixing portion 21; When locking, the second locking piece 22 moves toward the arc lock body 12 of the first lock body 10 along the insertion hole of the second fixing part 21 through the limiting groove 224 and the cooperation of the limiting piece. After the lock head 223 at the end of the locking rod 222 enters the locking position of the arc lock body 12, the locking rod 222 is rotated so that the lock head 223 is tightly fitted on the locking hole 1291 of the arc lock body 12. During rotation, the locking rod 222 rotates relative to the lock cylinder 221 through the threaded structure to tighten the arc lock body 12 as a whole toward the second lock body 20 so that the contact surface of the arc lock body 12 is in close contact with the locking cavity 111 of the first lock body 10 and form a transverse locking surface perpendicular to the direction of the locking rod 222.

[0024] Specifically, the arc lock body 12 is an I-shaped structure, such as Figure 3 、 Figure 4 As shown, it includes a straight piece 121, an oblique piece 122 and an intermediate piece 123. The intermediate piece 123 is provided with a core hole 125. The lock core can be inserted into the lock hole 126 and fixed in the lock hole 126 by a positioning column 128. A locking hole 1291 is provided in the middle position of the lock core. The straight piece 121, the oblique piece 122 and the intermediate piece 123 have a through lock hole 126, and the locking hole 1291 is exposed in the lock hole 126.

[0025] A limiting hole 127 is further provided on the arc lock body 12 , and the arc lock body 12 is pre-installed on the first fixing portion 11 by the cooperation of the knob screw and the limiting hole 127 .

[0026] The arc lock body 12 fixes the lock core 129 in the core hole 125 through a pin body 1293 and a pin hole 1292.

[0027] The I-shaped arc lock body 12 has an exquisite and stable overall structure and is not easily deformed under long-term external tension. The height of the I-shaped lock body is the same as the height of the high-precision arc lock device of the LED display screen.

[0028] Specifically, such as Figure 1 As shown, the locking cavity 111 of the first fixing part 11 is a semi-open cavity, and the opening of the semi-open cavity includes two protrusions, each of which is adapted to the I-groove at the middle piece 123 of the arc lock body 12. When the arc lock body 12 is inserted into the locking cavity 111 of the first fixing part 11, the I-groove of the middle piece 123 is inserted into and clamped on the two protrusions of the opening of the semi-open cavity, the oblique piece 122 is inserted into the semi-open cavity and the straight piece 121 is placed on the outside, or the straight piece 121 is inserted into the semi-open cavity and the oblique piece 122 is placed on the outside.

[0029] The open cavity of the plate allows the arc lock body 12 to be inserted into the locking cavity 111 of the first fixing portion 11 while the working surface remains outside to cooperate with the second lock body 20 .

[0030] Specifically, the straight piece 121 includes a first straight connecting surface, which is perpendicular to the bottom surface of the curved lock body 12 , and the oblique piece 122 includes a second oblique connecting surface, which forms an angle with the bottom surface of the curved lock body 12 .

[0031] Specifically, when the box A31 and the box B32 are fixedly connected, the oblique piece 122 of the arc lock body 12 is inserted into the semi-open cavity and the straight piece 121 is placed on the outside. When the locking rod 222 and the lock head 223 of the second locking piece 22 lock the locking hole 1291 of the lock core, the first straight connecting surface of the straight piece 121 is in close contact with the second connecting surface 23 of the second fixed part 21 and the box A31 and the box B32 are horizontally connected; or, the straight piece 121 of the arc lock body 12 is inserted into the semi-open cavity and the oblique piece 122 is placed on the outside. When the locking rod 222 and the lock head 223 of the second locking piece 22 lock the locking hole 1291 of the lock core, the first oblique connecting surface 1221 of the oblique piece 122 is in close contact with the second connecting surface 23 of the second fixed part 21 and the box A31 and the box B32 are connected at the inclination angle of the first oblique connecting surface 1221.

[0032] Specifically, the angle between the second oblique connecting surface and the bottom surface of the curved lock body 12 can be selected from: 95°, 92.5°, 90°, 87.5°, and 85°. When the angle between the second oblique connecting surface and the bottom surface of the curved lock body 12 is 87.5°, the upper surface of the oblique member 122 is marked as +2.5°. When the angle between the second oblique connecting surface and the bottom surface of the curved lock body 12 is 90°, the upper surface of the oblique member 122 is marked as 0°.

[0033] Specifically, such as Figure 5 As shown, the oblique piece 122 of the arc lock body 12 is inserted into the semi-open cavity and the straight piece 121 is placed on the outside. When the locking rod 222 and the lock head 223 of the second locking piece 22 lock the locking hole 1291 of the lock core, the two oblique force surfaces 124 of the oblique piece 122 facing the middle piece 123 act closely with the two protrusions of the first fixed part 11; or, the straight piece 121 of the arc lock body 12 is inserted into the semi-open cavity and the oblique piece 122 is placed on the outside. When the locking rod 222 and the lock head 223 of the second locking piece 22 lock the locking hole 1291 of the lock core, the two straight force surfaces of the straight piece 121 facing the middle piece 123 act closely with the two protrusions of the first fixed part 11.

[0034] In this specific description, taking the contact between the straight piece 121 and the second fixing portion 21 as an example, when the lock head 223 locks the lock cylinder, it includes three opposing surfaces: First, the lock head 223 interacts with the surface surrounding the locking hole 1291 of the lock cylinder; Second, under the interaction between the lock head 223 and the lock core, the interaction between the two inclined force surfaces 124 of the inclined member 122 and the protrusion; Third, the interaction between the first straight connection surface of the straight element 121 and the second connection surface 23 .

[0035] Specifically, when the second locking member 22 is fully inserted into the socket of the second fixing part 21, the lock head 223 is inserted into the locking hole 1291 of the lock core, and there is a first gap between the lock head 223 and the lock core. When the locking rod 222 rotates a locking distance relative to the lock cylinder 221 through the threaded structure, the locking rod 222 is displaced a second distance relative to the lock cylinder 221, and the second distance is ≥ the first gap.

[0036] Specifically, the locking hole 1291 of the lock core is an elongated hole, and the lock head 223 is an elongated block that can pass through the elongated hole. After passing through the elongated hole, the lock head 223 is rotated so that the lock head 223 and the locking hole 1291 intersect and cannot be disengaged. Preferably, the angle of the lock head 223 passing through the elongated hole is 0°, and then it is rotated to 90° so that the lock head 223 and the locking hole 1291 intersect and cannot be disengaged.

[0037] Furthermore, a trigger 226 is provided at the lock handle 225 , and the trigger 226 is used to prevent the lock handle 225 from rotating upward due to vibration, thereby causing a gap between the boxes.

[0038] The present application proposes a new curved lock device with a compact and precise lock body structure and convenient and quick operation. In particular, the overall height is significantly reduced compared to traditional lock bodies, with only the height of a curved lock body 12, which greatly reduces the overall thickness of the LED box during installation and transportation; the contact surface of the traditional connecting lock is non-perpendicular to the two boxes, and the contact area of ​​the curved lock with a polyhedral structure is small, while the contact surface of the curved lock body 12 of the present curved lock body is vertical and the contact area is maximized, thereby maximizing the firmness of the adjacent LED display boxes.

[0039] Example 2 This embodiment provides a method for connecting an LED display screen, including: S1: Obtain the cabinet A31 and cabinet B32 to be spliced, and select the model of the arc lock body 12 according to the splicing angle of the cabinet A31 and cabinet B32; S2: Install the selected arc lock body 12 into the locking cavity 111 of the first fixing part 11 of the box body A31 according to the splicing angle requirement, and fix the arc lock body 12 with the knob screw; S3: Place cabinet A31 and cabinet B32 side by side; S4: Push the second locking member 22 of the second lock body 20 of box B into the lock hole 126 of box A31. When the lock head 223 passes through the locking hole 1291 of the lock cylinder, it enters the locked position. It is only necessary to rotate the lock rod 222 so that the lock head 223 is tightly fitted on the locking hole 1291 of the arc lock body 12. When the lock rod 222 is rotated, the lock rod 222 rotates relative to the lock cylinder 221 through the threaded structure to tighten the arc lock body 12 as a whole toward the second lock body 20, so that the contact surface of the arc lock body 12 and the locking cavity 111 of the first lock body 10 are in close contact and form a transverse locking surface perpendicular to the direction of the lock rod 222. S5: Press the lock handle 225 of the second lock body 20 of the box body B32 downward and rotate it to reach the locking limit.

[0040] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above 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. The above embodiments only express several implementation methods of the present application. The description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of this application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of this application, several variations and improvements can be made, which all fall within the scope of protection of this application.

[0041] It should be noted that when an element is referred to as being "fixed on" or "set on" another component, it may be directly on the other component or indirectly set on the other component; when a component is referred to as being "connected to" another component, it may be directly connected to the other component or indirectly connected to the other component. It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0043] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

Claims

1. A high-precision arc locking device for LED display screen, characterized in that: comprising a first lock body and a second lock body; The first lock body includes a first fixing portion and a curved lock body, wherein the first fixing portion is fixed to a first side of the LED display housing, and the first fixing portion includes a locking cavity for accommodating the curved lock body, and the curved lock body can be replaced and accommodated in the locking cavity and locked or unlocked with the second lock body; The second lock body includes a second fixing portion and a second locking member, wherein the second fixing portion is fixed to the second side of the LED display box, and the second locking member includes a lock cylinder and a locking rod. The second fixing portion is provided with an insertion hole facing the first lock body, the lock cylinder is arranged in the insertion hole, and the locking rod is arranged in the lock cylinder through a threaded structure; The second fixing portion is provided with a limiting member in the insertion hole, and a limiting groove is provided on the surface of the lock cylinder to cooperate with the limiting member. The long side direction of the limiting groove is consistent with the hole axis direction of the insertion hole facing the first lock body, so that when the lock cylinder is inserted into the insertion hole, the lock cylinder can only move along the long side direction of the limiting groove and cannot rotate relative to the second fixing portion; When locked, the second locking piece moves along the insertion hole of the second fixing part toward the arc lock body direction of the first lock body through the cooperation of the limit groove and the limit piece. After the lock head at the end of the locking rod enters the locking position of the arc lock body, the locking rod is rotated so that the lock head is tightly fitted on the locking hole of the arc lock body. During rotation, the locking rod rotates relative to the lock cylinder through the threaded structure to tighten the arc lock body as a whole toward the second lock body direction so that the contact surface of the arc lock body is in close contact with the locking cavity of the first lock body and a transverse locking surface perpendicular to the direction of the locking rod is formed.

2. The high-precision arc locking device for LED display screen according to claim 1, characterized in that: The arc lock body is an I-shaped structure, including a straight piece, an oblique piece and an intermediate piece. The intermediate piece is provided with a core hole, the lock core can be inserted into the lock hole and fixed in the lock hole. A locking hole is provided in the middle position of the lock core, and the straight piece, the oblique piece and the intermediate piece have a through lock hole, and the locking hole is exposed in the lock hole.

3. The high-precision arc locking device for LED display screen according to claim 2, characterized in that: The locking cavity of the first fixing part is a semi-open cavity. The opening of the semi-open cavity includes two protrusions, each of which is adapted to the I-shaped groove at the middle piece of the curved lock body. When the curved lock body is inserted into the locking cavity of the first fixing part, the I-shaped groove of the middle piece is inserted into and clamped on the two protrusions of the opening of the semi-open cavity, the oblique piece is inserted into the semi-open cavity and the straight piece is placed on the outside, or the straight piece is inserted into the semi-open cavity and the oblique piece is placed on the outside.

4. The high-precision arc locking device for LED display screen according to claim 3, characterized in that: The straight piece includes a first straight connecting surface, which is perpendicular to the bottom surface of the curved lock body. The oblique piece includes a second oblique connecting surface, which forms an angle with the bottom surface of the curved lock body.

5. The high-precision arc locking device for LED display screen according to claim 4, characterized in that: When box A and box B are fixedly connected, the oblique piece of the arc lock body is inserted into the semi-open cavity and the straight piece is placed outside. When the locking rod and lock head of the second locking piece lock the locking hole of the lock cylinder, the first straight connecting surface of the straight piece is in close contact with the second connecting surface of the second fixing part, and box A and box B are horizontally connected; Or, the straight piece of the curved lock body is inserted into the semi-open cavity and the oblique piece is placed on the outside. When the locking rod and lock head of the second locking piece lock the locking hole of the lock cylinder, the first oblique connecting surface of the oblique piece is in close contact with the second connecting surface of the second fixing part and the box A and the box B are connected at the inclination angle of the first oblique connecting surface.

6. The high-precision arc locking device for LED display screen according to claim 4, characterized in that: The included angle between the second oblique connecting surface and the bottom surface of the arc lock body can be selected from: 95°, 92.5°, 90°, 87.5°, and 85°.

7. The high-precision arc locking device for LED display screen according to claim 5, characterized in that: The oblique piece of the arc lock body is inserted into the semi-open cavity and the straight piece is placed outside. When the locking rod and lock head of the second locking piece lock the locking hole of the lock cylinder, the two oblique force surfaces of the oblique piece facing the middle piece act closely with the two protrusions of the first fixing part. Or, the straight piece of the arc lock body is inserted into the semi-open cavity and the oblique piece is placed on the outside. When the locking rod and lock head of the second locking piece lock the locking hole of the lock cylinder, the two straight force surfaces of the straight piece facing the middle piece act tightly against the two protrusions of the first fixing part.

8. The high-precision arc locking device for LED display screen according to claim 5, characterized in that: When the second locking piece is fully inserted into the insertion hole of the second fixing part, the lock head is inserted into the locking hole of the lock core, and there is a first gap between the lock head and the lock core. When the locking rod rotates a locking distance relative to the lock cylinder through the threaded structure, the locking rod moves a second distance relative to the lock cylinder, and the second distance is ≥ the first gap.

9. The high-precision arc locking device for LED display screen according to claim 8, characterized in that: The locking hole of the lock core is an elongated hole, and the lock head is an elongated block that can pass through the elongated hole. After the lock head passes through the elongated hole, it rotates so that the lock head and the locking hole intersect and cannot be separated.

10. A method for connecting an LED display screen, characterized in that: include: Get cabinets A and B to be spliced, and select the model of the arc lock body according to the splicing angle of cabinets A and B; Install the selected arc lock body into the locking cavity of the first fixing part of the box A according to the splicing angle requirements, and fix the arc lock body with the knob screw; Place box A and box B side by side; Push the second locking piece of the second lock body of box B into the lock hole of box A. When the lock head passes through the locking hole of the lock cylinder, it enters the locked position. You only need to rotate the lock rod so that the lock head fits tightly on the locking hole of the curved lock body. When the lock rod is rotated, the lock rod rotates relative to the lock cylinder through the threaded structure to pull the curved lock body as a whole toward the second lock body, so that the contact surface of the curved lock body and the locking cavity of the first lock body are in close contact and form a transverse locking surface perpendicular to the direction of the lock rod; Press the lock handle of the second lock body of box B downward and rotate it to reach the locking limit.

Images