LED Display

Abstract

The utility model provides an LED display screen, which includes: a box body with a lock hole; a display unit, which is arranged at the front side of the box body; a maintenance mechanism including a locking member and an elastic member, the locking member including a lock column and a lock tongue arranged at the rear end of the lock column, the lock column is inserted into the lock hole, the lock tongue has a locked state locked with the lock hole and an unlocked state movably inserted into the lock hole along the front and rear directions, the front end of the lock column is rotatably connected to the display unit around the axis of the lock column to drive the lock tongue to switch between the locked state and the unlocked state, the elastic member is arranged between the display unit and the lock column, and when the lock tongue is in the locked state, the elastic member applies a forward force to the locking member. Through the technical solution provided by the present application, the problem that the maintenance mechanism in the related art is easy to get stuck when rotating to unlock can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display screens, and in particular to an LED display screen. Background Art

[0002] LED display screens are widely used in shopping malls, hospitals, schools, gymnasiums and other places. LED display screens are made up of multiple LED display modules.

[0003] In the related art, the LED display screen includes a housing, a display unit and a maintenance mechanism. The maintenance mechanism is arranged at the rear side of the display unit. The display unit is detachably arranged at the front side of the housing through the maintenance mechanism. The maintenance mechanism adopts a rotating unlocking method.

[0004] However, the maintenance mechanism in the related art is easily stuck when rotating to unlock. Utility Model Content

[0005] The utility model provides an LED display screen to solve the problem in the related art that a maintenance mechanism is easily stuck when rotating to unlock.

[0006] The utility model provides an LED display screen, which comprises: a box body provided with a lock hole; a display unit arranged at the front side of the box body; a maintenance mechanism, comprising a locking piece and an elastic piece, wherein the locking piece comprises a lock column and a lock tongue arranged at the rear end of the lock column, the lock column is penetrated in the lock hole, the lock tongue has a locked state locked with the lock hole and an unlocked state movably penetrated in the lock hole along a front-back direction, the front end of the lock column is rotatably connected with the display unit around the axis of the lock column to drive the lock tongue to switch between the locked state and the unlocked state, the elastic piece is arranged between the display unit and the lock column, and when the lock tongue is in the locked state, the elastic piece applies a forward force to the locking piece.

[0007] Furthermore, the rear surface of the lock tongue has a driving bevel. When the lock tongue is in an unlocked state, the front end of the driving bevel is located in the lock hole. In the rotation direction of the lock tongue from the unlocked state to the locked state, the driving bevel gradually tilts backward, and the hole wall of the lock hole can slide with the driving bevel, so that in the process of the lock tongue rotating from the unlocked state to the locked state, the hole wall of the lock hole drives the locking member to move backward through the driving bevel.

[0008] Furthermore, when the lock tongue is in an unlocked state, the rear end of the driving inclined surface extends backward out of the lock hole.

[0009] Furthermore, the lock column includes: a column, which is rotatably inserted into the lock hole, and a lock tongue is arranged at the rear end of the column; an abutment boss, which is arranged at the front end of the column. The maintenance mechanism also includes a mounting plate sleeved on the column, the mounting plate is located between the box body and the display unit, the mounting plate is connected to the display unit, and the elastic member is sleeved on the column and clamped between the abutment boss and the mounting plate.

[0010] Furthermore, a receiving groove is arranged on the rear surface of the display unit, and the abutting boss and the elastic member are both located in the receiving groove.

[0011] Furthermore, the accommodating groove includes a front groove section and a rear groove section, the cross-sectional dimension of the front groove section is smaller than the cross-sectional dimension of the rear groove section, so as to form a step surface between the front groove section and the rear groove section, the abutment boss and the elastic member are both located in the front groove section, the mounting plate is arranged in the rear groove section and the front surface of the mounting plate abuts against the step surface.

[0012] Furthermore, the elastic member includes an elastic pad sleeved on the column.

[0013] Furthermore, the column body includes a front column section and a rear column section connected to each other, the radial dimension of the front column section is larger than the radial dimension of the rear column section, the elastic cushion is arranged on the front column section, the abutment boss is arranged at the front end of the front column section, and the locking tongue is arranged at the rear end of the rear column section.

[0014] Furthermore, the lock column also includes a positioning protrusion arranged on the front surface of the abutment boss; and / or the front end of the lock column has a front operating hole, and the rear end of the lock column has a rear operating hole, and the cross-sections of the front operating hole and the rear operating hole are both non-circular cross-sections.

[0015] Furthermore, the maintenance mechanism also includes a display unit connector that passes through the mounting plate; and / or the mounting plate includes a first plate body and a second plate body that are separately arranged, the first plate body is provided with a first notch, the second plate body is provided with a second notch, the first notch and the second notch are connected to form a mounting hole for passing the lock column.

[0016] The technical solution of the utility model is applied, and the LED display screen includes a box, a display unit and a maintenance mechanism. The display unit is detachably arranged on the front side of the box through the maintenance mechanism. The front end of the lock column is connected to the display unit. The lock column is inserted into the lock hole, so that the display unit is arranged on the front side of the box. The front end of the lock column is rotatably connected to the display unit around the axis of the lock column to drive the lock tongue to switch between a locked state and an unlocked state. When the lock tongue is in the locked state, the lock tongue is locked with the lock hole, so as to connect the display unit and the box by using the maintenance structure to complete the installation of the display unit. When the lock tongue is in the unlocked state, the display unit is moved forward to drive the locking member to be disengaged from the lock hole forward to complete the disassembly of the display unit. By arranging the elastic member between the display unit and the lock column, in the process of switching the lock tongue from the unlocked state to the locked state, the elastic deformation of the elastic member is utilized to facilitate the rotation of the locking member to avoid the locking member from being stuck, and when the lock tongue is in the locked state, the elastic member is utilized to apply a forward force to the locking member to stably connect the display unit and the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of the maintenance mechanism of the LED display screen provided by the embodiment of the utility model is shown;

[0019] Figure 2 An exploded view of a maintenance mechanism for an LED display screen provided by an embodiment of the utility model is shown;

[0020] Figure 3 A schematic diagram showing the structure of a locking member of an LED display screen provided by an embodiment of the utility model is shown;

[0021] Figure 4 A structural schematic diagram showing another perspective of the maintenance mechanism of the LED display screen provided by the embodiment of the utility model;

[0022] Figure 5 A schematic diagram showing the elastic member of the maintenance mechanism of the LED display screen provided by the embodiment of the utility model being sleeved onto the locking member;

[0023] Figure 6 A cross-sectional view of the LED display screen provided by the embodiment of the utility model when the lock tongue of the LED display screen is in a locked state is shown;

[0024] Figure 7 Shows Figure 6 A partial enlarged view of the middle A;

[0025] Figure 8 A cross-sectional view of the LED display screen provided by the embodiment of the utility model when the lock tongue of the LED display screen is in an unlocked state is shown;

[0026] Fig. 9 Shows Figure 8 A partial enlarged view of point B in the middle;

[0027] Fig.10 A schematic diagram of the structure of the LED display screen provided by the embodiment of the utility model when the lock tongue of the LED display screen is in an unlocked state is shown;

[0028] Fig.11 The schematic diagram of the structure of the LED display screen provided by the embodiment of the utility model is shown when the lock tongue of the LED display screen is in a locked state.

[0029] The above drawings include the following reference numerals:

[0030] 10. mounting plate; 11. first plate body; 111. first notch; 12. second plate body; 121. second notch;

[0031] 20, locking member; 21, locking column; 211, column; 2111, front column section; 2112, rear column section; 212, abutting boss; 213, positioning convex point; 214, front operating hole; 215, rear operating hole; 22, locking tongue; 221, driving inclined surface;

[0032] 30. Elastic parts;

[0033] 40. Display unit connector;

[0034] 50. Box body; 51. Lock hole; 60. Display unit; 70. Maintenance mechanism. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0036] like Figures 1 to 11As shown, an embodiment of the utility model provides an LED display screen, which includes a box body 50, a display unit 60 and a maintenance mechanism 70. The box body 50 has a lock hole 51, and the display unit 60 is arranged on the front side of the box body 50. The maintenance mechanism 70 includes a locking member 20 and an elastic member 30. The locking member 20 includes a lock column 21 and a lock tongue 22 arranged at the rear end of the lock column 21. The lock column 21 is inserted into the lock hole 51. The lock tongue 22 has a locked state locked with the lock hole 51 and an unlocked state movably inserted into the lock hole 51 along the front and rear directions. The front end of the lock column 21 is rotatably connected to the display unit 60 around the axis of the lock column 21 to drive the lock tongue 22 to switch between the locked state and the unlocked state. The elastic member 30 is arranged between the display unit 60 and the lock column 21. When the lock tongue 22 is in the locked state, the elastic member 30 applies a forward force to the lock member 20.

[0037] By applying the maintenance mechanism provided in this embodiment, the display unit 60 is detachably arranged on the front side of the box body 50 through the maintenance mechanism 70, the front end of the lock column 21 is connected to the display unit 60, and the lock column 21 is inserted into the lock hole 51, so that the display unit 60 is arranged on the front side of the box body 50, and the front end of the lock column 21 is rotatably connected to the display unit 60 around the axis of the lock column 21 to drive the lock tongue 22 to switch between a locked state and an unlocked state. When the lock tongue 22 is in the locked state, the lock tongue 22 is locked with the lock hole 51, so that the display unit 60 and the box body 50 are connected by the maintenance mechanism 70 to complete the installation of the display unit 60. When the lock tongue 22 is in the unlocked state, the display unit 60 is moved forward to drive the locking member 20 to be disengaged from the lock hole 51 forward to complete the disassembly of the display unit 60. By arranging the elastic member 30 between the display unit 60 and the lock column 21, when the lock tongue 22 switches from the unlocked state to the locked state, the elastic deformation of the elastic member 30 is utilized to facilitate the rotation of the lock member 20 and avoid the lock member 20 from getting stuck. When the lock tongue 22 is in the locked state, the elastic member 30 is utilized to apply a forward force to the lock member 20 to stably connect the display unit 60 and the box body 50.

[0038] In this embodiment, the lock tongue 22 and the lock hole 51 are both strip-shaped structures extending in a direction perpendicular to the front-to-back direction. Fig.10 As shown in FIG. 1 , when the lock tongue 22 is in the unlocked state, the lock tongue 22 and the lock hole 51 are aligned in the front-to-back direction, so that the lock tongue 22 is movably arranged in the lock hole 51 in the front-to-back direction. Fig.11 As shown, when the locking tongue 22 is in the locked state, the extension direction of the locking tongue 22 and the extension direction of the locking hole 51 are arranged at an angle to limit the forward movement of the locking tongue 22 relative to the locking hole 51 .

[0039] Specifically, “the lock tongue 22 is switched from the unlocked state to the locked state” can be achieved by the following operations:

[0040] (1) Apply a backward force to the locking member 20, so that the elastic member 30 is elastically deformed, and the lock tongue 22 extends backward out of the lock hole 51. Then, the locking member 20 is rotated so that the extension direction of the lock tongue 22 and the extension direction of the lock hole 51 form an angle. Then, the locking member 20 is released, and the elastic member 30 applies a forward force to the locking member 20, so that the display unit 60 and the box body 50 are stably connected.

[0041] (2) A driving slope is provided on the rear surface of the lock tongue 22. During the rotation of the locking member 20, the driving slope abuts against the hole wall of the lock hole 51 by utilizing the sliding cooperation between the hole wall of the lock hole 51 and the driving slope. The hole wall of the lock hole 51 drives the locking member 20 to move backward through the driving slope, and the elastic member 30 is elastically deformed. When the lock tongue 22 is in the locked state, the elastic member 30 applies a forward force to the locking member 20, so that the display unit 60 and the box body 50 are tightly connected.

[0042] Compared with comparative example 1 (a gap of 0.1 mm to 0.2 mm is reserved between the display unit and the housing to facilitate the rotation of the locking member and prevent the locking member from getting stuck), in this embodiment, when the lock tongue 22 is in the locked state, the elastic member 30 is used to apply a forward force to the locking member 20 to make the display unit 60 and the housing 50 tightly connected to prevent the connection from being loose. Compared with comparative example 2 (an elastic pad is attached to the rear surface of the housing, and when the lock tongue is in the locked state, the lock tongue abuts against the rear surface of the elastic pad to facilitate the rotation of the locking member and prevent the locking member from getting stuck, and the elastic pad is used to tightly connect the display unit and the housing), in this embodiment, by setting the elastic member 30 between the display unit 60 and the lock column 21, it is possible to prevent the lock tongue from scratching the elastic pad and prevent the elastic pad from falling off.

[0043] It should be noted that the elastic member 30 has a certain strength to ensure a stable connection between the display unit 60 and the box 50. The elastic member 30 can be a spring member or an elastic pad with a certain strength and slight elasticity, such as 45-85 degree silicone, softened PVC, nylon or softened PU.

[0044] like Figure 3As shown, the rear surface of the lock tongue 22 has a driving inclined surface 221. When the lock tongue 22 is in the unlocked state, the front end of the driving inclined surface 221 is located in the lock hole 51. In the rotation direction of the lock tongue 22 from the unlocked state to the locked state, the driving inclined surface 221 gradually tilts backward, and the hole wall of the lock hole 51 can slide with the driving inclined surface 221, so that when the lock tongue 22 rotates from the unlocked state to the locked state, the hole wall of the lock hole 51 drives the locking member 20 to move backward through the driving inclined surface 221. In the process of the lock tongue 22 switching from the unlocked state to the locked state, the driving inclined surface 221 abuts against the hole wall of the lock hole 51, and the hole wall of the lock hole 51 drives the locking member 20 to move backward through the driving inclined surface 221, and the elastic member 30 is elastically deformed. When the lock tongue 22 is in the locked state, the elastic member 30 is used to apply a forward force to the locking member 20, so that the display unit 60 and the box body 50 are tightly connected.

[0045] It should be noted that “when the lock tongue 22 is in the unlocked state, the front end of the driving slope 221 is located in the lock hole 51” means that when the lock tongue 22 is in the unlocked state, the elastic member 30 is in contact with the display unit 60 and the lock column 21 respectively, and the elastic member 30 has not undergone elastic deformation, the front end of the driving slope 221 is located in the lock hole 51.

[0046] Among them, when the lock tongue 22 is in the unlocked state, the elastic member 30 is in contact with the display unit 60 and the lock column 21 respectively, and the elastic member 30 has not undergone elastic deformation, the front-to-back distance between the front end of the driving slope 221 and the rear end of the lock hole 51 is the same as the compression amount of the elastic member 30 when the lock tongue 22 is in the locked state.

[0047] In this embodiment, when the lock tongue 22 is in the unlocked state, the rear end of the driving bevel 221 extends backward out of the lock hole 51. During the process of the lock tongue 22 rotating from the unlocked state to the locked state, there is no need to apply a backward force to the locking member 20. The driving bevel 221 can be brought into contact with the hole wall of the lock hole 51 simply by rotating the locking member 20, thereby simplifying the operation.

[0048] It should be noted that “when the lock tongue 22 is in the unlocked state, the rear end of the driving inclined surface 221 extends backward out of the lock hole 51” means that when the lock tongue 22 is in the unlocked state, the elastic member 30 contacts the display unit 60 and the lock column 21 respectively, and the elastic member 30 does not undergo elastic deformation, the rear end of the driving inclined surface 221 extends backward out of the lock hole 51.

[0049] like Figure 1 , Figure 7 as well as Fig. 9As shown, the lock column 21 includes a column 211 and an abutting boss 212, the column 211 is rotatably inserted into the lock hole 51, the lock tongue 22 is arranged at the rear end of the column 211, and the abutting boss 212 is arranged at the front end of the column 211. The maintenance mechanism 70 also includes a mounting plate 10 sleeved on the column 211, the mounting plate 10 is located between the box 50 and the display unit 60, and the mounting plate 10 is connected to the display unit 60. The elastic member 30 is sleeved on the column 211 and sandwiched between the abutting boss 212 and the mounting plate 10. By sleeved on the column 211 and sandwiched between the abutting boss 212 and the mounting plate 10, the elastic member 30 is conveniently installed.

[0050] In this embodiment, a receiving groove is provided on the rear surface of the display unit 60, and the abutting boss 212 and the elastic member 30 are both located in the receiving groove. The compactness between the box 50 and the display unit 60 can be improved by accommodating the abutting boss 212 and the elastic member 30 in the receiving groove.

[0051] Specifically, the accommodating groove includes a front groove section and a rear groove section, the cross-sectional dimension of the front groove section is smaller than the cross-sectional dimension of the rear groove section, so as to form a step surface between the front groove section and the rear groove section, the abutting boss 212 and the elastic member 30 are both located in the front groove section, the mounting plate 10 is disposed in the rear groove section, and the front surface of the mounting plate 10 abuts against the step surface. By using the front groove section to accommodate the abutting boss 212 and the elastic member 30, and using the rear groove section to accommodate the mounting plate 10, the compactness between the box body 50 and the display unit 60 can be further improved.

[0052] In this embodiment, the elastic member 30 includes an elastic pad sleeved on the column 211 .

[0053] like Figure 2 and Figure 4 As shown, the column 211 includes a front column section 2111 and a rear column section 2112 connected to each other, the radial dimension of the front column section 2111 is larger than the radial dimension of the rear column section 2112, the elastic pad is sleeved on the front column section 2111, the abutting boss 212 is arranged at the front end of the front column section 2111, and the locking tongue 22 is arranged at the rear end of the rear column section 2112. Since the radial dimension of the front column section 2111 is larger than the radial dimension of the rear column section 2112, it is convenient for the elastic pad to be sleeved on the front column section 2111 through the locking tongue 22 and the rear column section 2112.

[0054] like Figure 5As shown, in the process of the elastic pad being sleeved onto the column 211, one end of the locking tongue 22 is first passed through the inner hole of the elastic pad so that part of the elastic pad contacts the rear column section 2112, and then the inner hole of the elastic pad is pulled so that the other end of the locking tongue 22 passes through the inner hole of the elastic pad. Since the radial dimension of the front column section 2111 is larger than the radial dimension of the rear column section 2112, the pulling deformation of the elastic pad in the above process can be reduced, and the damage to the elastic pad can be reduced. In addition, since the elastic pad is sleeved on the front column section 2111, the inner hole size of the elastic pad can be increased to facilitate the elastic pad to be sleeved on the front column section 2111 through the locking tongue 22 and the rear column section 2112.

[0055] like Figure 4 As shown, the lock column 21 also includes a positioning protrusion 213 arranged on the front surface of the abutting boss 212. The back of the display unit 60 has a first positioning groove and a second positioning groove. When the lock tongue 22 is in a locked state, the positioning protrusion 213 extends into the first positioning groove and is limited in position. When the lock tongue 22 is in an unlocked state, the positioning protrusion 213 extends into the second positioning groove and is limited in position.

[0056] like Figure 1 and Figure 4 As shown, the front end of the lock cylinder 21 has a front operation hole 214, and the rear end of the lock cylinder 21 has a rear operation hole 215, and the cross-sections of the front operation hole 214 and the rear operation hole 215 are both non-circular. With the above-mentioned front operation hole 214 and rear operation hole 215, the display unit 60 has an avoidance hole coaxially arranged and connected to the front operation hole 214, so that the driving torque can be applied to the lock cylinder 21 from the front side and the rear side of the maintenance mechanism.

[0057] like Figure 1 As shown, the maintenance mechanism further includes a display unit connector 40 passing through the mounting plate 10. The display unit connector 40 is a fastener, which passes through the mounting plate 10, and the two ends of the fastener are connected to the mounting plate 10 and the display unit 60 respectively.

[0058] like Figure 2 As shown, the mounting plate 10 includes a first plate body 11 and a second plate body 12 which are separately arranged, a first notch 111 is arranged on the first plate body 11, a second notch 121 is arranged on the second plate body 12, and the first notch 111 and the second notch 121 are butted together to form a mounting hole for inserting the lock column 21. The first plate body 11 and the second plate body 12 which are separately arranged can improve the assembly efficiency of the maintenance mechanism.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An LED display screen, characterized in that: The LED display screen comprises: The box body (50) has a lock hole (51); A display unit (60) is arranged on the front side of the box (50); The maintenance mechanism (70) comprises a locking member (20) and an elastic member (30), wherein the locking member (20) comprises a locking column (21) and a locking tongue (22) arranged at the rear end of the locking column (21), wherein the locking column (21) is inserted into the locking hole (51), wherein the locking tongue (22) has a locked state in which it is locked with the locking hole (51) and an unlocked state in which it is movably inserted into the locking hole (51) in the front-rear direction, wherein the front end of the locking column (21) is rotatably connected to the display unit (60) around the axis of the locking column (21) so as to drive the locking tongue (22) to switch between the locked state and the unlocked state, wherein the elastic member (30) is arranged between the display unit (60) and the locking column (21), and wherein when the locking tongue (22) is in the locked state, the elastic member (30) applies a forward force to the locking member (20).

2. The LED display screen according to claim 1, characterized in that: The rear surface of the lock tongue (22) has a driving inclined surface (221). When the lock tongue (22) is in the unlocked state, the front end of the driving inclined surface (221) is located in the lock hole (51). In the rotation direction of the lock tongue (22) from the unlocked state to the locked state, the driving inclined surface (221) gradually tilts backwards. The hole wall of the lock hole (51) can slidably cooperate with the driving inclined surface (221), so that when the lock tongue (22) rotates from the unlocked state to the locked state, the hole wall of the lock hole (51) drives the locking member (20) to move backwards through the driving inclined surface (221).

3. The LED display screen according to claim 2, characterized in that: When the locking tongue (22) is in the unlocked state, the rear end of the driving inclined surface (221) extends backward out of the locking hole (51).

4. The LED display screen according to any one of claims 1 to 3, characterized in that: The locking cylinder (21) comprises: A column (211) is rotatably inserted into the lock hole (51), and the lock tongue (22) is arranged at the rear end of the column (211); The abutment boss (212) is arranged at the front end of the column (211). The maintenance mechanism (70) further comprises a mounting plate (10) sleeved on the column (211). The mounting plate (10) is located between the box (50) and the display unit (60). The mounting plate (10) is connected to the display unit (60). The elastic member (30) is sleeved on the column (211) and clamped between the abutment boss (212) and the mounting plate (10).

5. The LED display screen according to claim 4, characterized in that: A receiving groove is provided on the rear surface of the display unit (60), and the abutting boss (212) and the elastic member (30) are both located in the receiving groove.

6. The LED display screen according to claim 5, characterized in that: The accommodating groove comprises a front groove section and a rear groove section, the cross-sectional dimension of the front groove section is smaller than the cross-sectional dimension of the rear groove section, so as to form a step surface between the front groove section and the rear groove section, the abutting boss (212) and the elastic member (30) are both located in the front groove section, the mounting plate (10) is arranged in the rear groove section and the front surface of the mounting plate (10) abuts against the step surface.

7. The LED display screen according to claim 4, characterized in that: The elastic member (30) comprises an elastic pad sleeved on the column (211).

8. The LED display screen according to claim 7, characterized in that: The column (211) comprises a front column section (2111) and a rear column section (2112) which are connected to each other. The radial dimension of the front column section (2111) is greater than the radial dimension of the rear column section (2112). The elastic pad is sleeved on the front column section (2111). The abutting boss (212) is arranged at the front end of the front column section (2111). The locking tongue (22) is arranged at the rear end of the rear column section (2112).

9. The LED display screen according to claim 4, characterized in that: The locking column (21) further comprises a positioning protrusion (213) arranged on the front surface of the abutting boss (212); and / or, The front end of the locking column (21) has a front operating hole (214), and the rear end of the locking column (21) has a rear operating hole (215). The cross sections of the front operating hole (214) and the rear operating hole (215) are both non-circular cross sections.

10. The LED display screen according to claim 4, characterized in that: The maintenance mechanism further comprises a display unit connector (40) penetrating the mounting plate (10); and / or, The mounting plate (10) comprises a first plate body (11) and a second plate body (12) which are separately arranged, the first plate body (11) being provided with a first notch (111), the second plate body (12) being provided with a second notch (121), the first notch (111) and the second notch (121) being butted together to form a mounting hole for penetrating the locking column (21).

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