Display screen unit and display screen

Abstract

The utility model relates to display equipment technical field especially relates to a display screen unit and display screen, a kind of display screen unit includes display screen shell and positioning assembly, display screen shell has first positioning part and second positioning part;First positioning part is equipped with first pin hole, positioning hole and positioning sliding slot, first pin hole is along the outer surface of first positioning part and is penetrated in first direction, positioning sliding slot is along second direction and is communicated with first pin hole and is penetrated in first positioning part, positioning hole is along the inner hole wall of first pin hole and is penetrated in second direction;Second positioning part is equipped with second pin hole;Positioning assembly includes positioning pin and locking piece, positioning pin is inserted and is installed in first pin hole, positioning pin is equipped with the perforation and is penetrated in second direction, locking piece is worn in positioning sliding slot and perforation;When locking piece is in the unlocking state, locking piece can drive positioning pin and move between first position and second position;In first position, the front end of locking piece is housed in perforation, and positioning pin is retracted in first pin hole as a whole.

Description

Technical Field

[0001] This utility model relates to the field of display device technology, and in particular to a display screen unit and a display screen. Background Technology

[0002] LED displays are display devices that convert electronic signals into visual images, text, or videos. They feature high brightness, wide viewing angle, long lifespan, and customizability, and are widely used in outdoor advertising, stage performances, stadiums, conference centers, and other scenarios.

[0003] The entire LED display screen is usually assembled from multiple small display screen units. Adjacent display screen units are usually positioned by positioning pins, which makes the alignment more accurate and the connection more stable.

[0004] However, existing positioning pins are usually fixedly installed on the display unit. After the entire LED display is built, when it is necessary to replace the middle display unit, due to the limitation of the positioning pin, it is not possible to directly remove the display unit to be replaced from the middle of the entire display. Instead, it is necessary to start disassembling from the display unit on the edge, which makes the operation of replacing the middle display unit cumbersome. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: to address the problem that the replacement of the middle display unit of an LED display screen is cumbersome due to the existing positioning pins, and to provide a display unit and display screen.

[0006] To address the aforementioned problems, this utility model provides a display screen unit, including a display screen housing and a positioning component. The display screen housing has a first positioning portion and a second positioning portion disposed opposite to each other along a first direction. The first positioning portion has a first pin hole, a positioning hole, and a positioning groove. The first pin hole penetrates the outer surface of the first positioning portion along the first direction. The positioning hole and the positioning groove are located on opposite sides of the first pin hole along a second direction. The positioning groove passes through the first positioning portion along the second direction and communicates with the first pin hole. The positioning hole penetrates the inner wall of the first pin hole along the second direction. The second positioning portion has a second pin hole directly opposite the first pin hole. The second pin hole penetrates the outer surface of the second positioning portion along the first direction. The first direction is either the width or height direction of the display screen housing, and the second direction is the front-rear direction of the display screen housing. The positioning component includes a positioning pin and a locking member. The positioning pin is inserted into the first pin hole and has a through hole extending along the second direction. The locking member is sequentially inserted into the positioning groove and the through hole. The locking member has a locked state and an unlocked state. When the locking member is in the unlocked state, it can drive the positioning pin to move between a first position and a second position along the first direction. In the first position, the front end of the locking member is accommodated in the through hole, and the positioning pin is retracted into the first pin hole. In the second position, the head end of the positioning pin protrudes from the first pin hole, the through hole is directly opposite the positioning hole along the second direction, and the front end of the locking member can be inserted into the positioning hole. When the locking member is in the locked state, it is fixed to the first positioning part.

[0007] Optionally, the locking element is a bolt, which is threadedly connected to the locating pin and / or the first locating part; when the locating pin is in the second position, the bolt is tightened, the head of the bolt presses against the first locating part, the shank of the bolt is inserted into the locating hole, and the bolt is switched to the locked state.

[0008] Optionally, the perforation includes an internally threaded hole and a guide hole distributed along its centerline. The guide hole connects the internally threaded hole and the positioning groove. The cross-sectional shape of the guide hole is larger than that of the internally threaded hole. The guide hole is used to guide the shank of the bolt into the internally threaded hole.

[0009] Optionally, the positioning groove includes a slot and a recess, the slot being an elongated strip extending along the first direction, and the recess being located at the end of the slot away from the second positioning part; the slot penetrates the first positioning part along the second direction, and the recess penetrates the rear surface of the first positioning part along the second direction. The shank of the bolt passes through the slot. In the first position, the bolt is hung on one end of the slot near the second positioning part. In the second position, the head of the bolt in the locked state is sunk into the groove.

[0010] Optionally, the head of the bolt includes a clamping part and a turning part, the shank, the clamping part and the turning part are connected sequentially along the axial direction of the bolt, the clamping part is cylindrical, the diameter of the clamping part is larger than the diameter of the shank, and the shank or the clamping part is provided with external threads; In the second position, the bolt is tightened by the turning part, and the clamping part sinks into the groove.

[0011] Optionally, the outer periphery of the rotating part is provided with an anti-slip structure.

[0012] Optionally, the outer peripheral surface of the positioning pin is provided with a first anti-rotation surface extending along the first direction, the cross-sectional shape of the first pin hole matches the cross-sectional shape of the positioning pin, the inner wall surface of the first pin hole has a second anti-rotation surface extending along the first direction, the first anti-rotation surface and the second anti-rotation surface are opposite to each other, and the second anti-rotation surface restricts the positioning pin from rotating in the first pin hole.

[0013] Optionally, the head end of the positioning pin is provided with a chamfer, which is used to guide the positioning pin into the second pin hole of the adjacent display unit.

[0014] Optionally, it also includes a display panel, the display housing including a bottom shell and a frame, the bottom shell supporting and fixing the display panel, the bottom shell being mounted on the frame, and the frame having a first positioning part and a second positioning part.

[0015] On the other hand, this utility model embodiment provides a display screen, including a plurality of display screen units as described above, wherein in any two adjacent display screen units assembled along the first direction, the head end of the positioning pin of one display screen unit is inserted into the second pin hole of the other display screen unit.

[0016] The display unit of this application has a first positioning part equipped with a positioning component. A positioning pin is inserted into the first pin hole of the first positioning part along a first direction. The first positioning part has positioning grooves and positioning holes on opposite sides of the first pin hole along a second direction. A locking member passing through the positioning groove and the through hole can drive the positioning pin to move between a first position and a second position. The head end of the positioning pin in the second position extends out of the first pin hole, and the front end of the locking member can be inserted into the positioning hole corresponding to the through hole. After the locking member is switched to the locked state, the locking member is fixed to the first positioning part, so that the positioning pin remains in the extended state. Thus, adjacent display units can be assembled by aligning the positioning pin with the second pin hole of the second positioning part. When it is necessary to replace the middle display unit, the locking member is switched to the unlocked state. The locking member drives the positioning pin to move along the first direction to the first position, so that the positioning pin retracts into the first pin hole, releasing the positioning engagement between the display unit and the adjacent display unit. Thus, the middle display unit can be directly removed from the display screen. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a display screen unit provided in one embodiment of the present invention; Figure 2 for Figure 1 A diagram of the back of the building; Figure 3 for Figure 2 A partial structural diagram of the locating pin in the first position; Figure 4 for Figure 3 The main view; Figure 5 for Figure 3 A cross-sectional view of the locating pin in the locked state; Figure 6 for Figure 3 A cross-sectional view of the locating pin in the unlocked state; Figure 7 for Figure 2 A schematic diagram of the locating pin in the middle; Figure 8 for Figure 2 A schematic diagram of the locking mechanism in the middle; Figure 9 for Figure 2 A partial structural diagram of the locating pin in the second position; Figure 10 for Figure 9 A cross-sectional view of the locating pin in the locked state.

[0019] The reference numerals in the accompanying drawings are as follows: 100. Display screen housing; 101. Bottom shell; 102. Frame; 200. Display panel; 1. First positioning part; 11. First pin hole; 111. Second anti-rotation surface; 12. Positioning groove; 121. Slot; 122. Countersunk groove; 13. Positioning hole; 2. Positioning pin; 21. Through hole; 211. Internal threaded hole; 212. Guide hole; 22. First anti-rotation surface; 23. Chamfer; 3. Locking part; 31. Rod part; 32. Pressing part; 33. Tightening part; 44. Anti-slip structure; 5. Second positioning part. Detailed Implementation

[0020] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] One embodiment of this utility model provides a display screen unit, such as... Figure 1 and Figure 2As shown, the display unit includes a positioning component and a display housing 100. The display housing 100 has a first positioning part 1 and a second positioning part 5 disposed opposite to each other along a first direction. The first direction is either the width direction or the height direction of the display housing 100. The "width direction of the display housing 100" refers to the left-right direction of the display housing 100 when the display is in use. Figure 1 In this context, D1 represents the first direction.

[0022] like Figures 3 to 5 As shown, the first positioning part 1 is provided with a first pin hole 11, a positioning hole 13, and a positioning groove 12. The first pin hole 11 penetrates the outer surface of the first positioning part 1 along a first direction. The positioning hole 13 and the positioning groove 12 are located on opposite sides of the first pin hole 11 along a second direction. The positioning groove 12 penetrates the positioning part along the second direction and communicates with the first pin hole 11. The positioning hole 13 penetrates the inner wall of the first pin hole 11 along the second direction. The second positioning part 5 is provided with a second pin hole that is directly opposite the first pin hole 11. The second pin hole penetrates the outer surface of the second positioning part 5 along the first direction.

[0023] The positioning assembly includes a positioning pin 2 and a locking member 3. The positioning pin 2 is inserted into the first pin hole 11, and the positioning pin 2 has a through hole 21 extending along a second direction. The locking member 3 is sequentially inserted into the positioning slide groove 12 and the through hole 21. The second direction is the front-rear direction of the display screen housing 100, and the front side of the display screen housing 100 is the side closest to the display surface of the display screen unit. Figure 3 D2, as shown, represents the second direction.

[0024] like Figure 5 and Figure 6 As shown, the locking member 3 has a locked state and an unlocked state. When the locking member 3 is in the unlocked state, the locking member 3 can drive the positioning pin 2 to move between the first position and the second position along the first direction. In the first position, the front end of the locking member 3 is accommodated in the through hole 21, and the positioning pin 2 is retracted into the first pin hole 11.

[0025] like Figure 9 and Figure 10 As shown, in the second position, the head end of the positioning pin 2 extends from the first pin hole 11 to be inserted into the second pin hole of the adjacent display unit, the through hole 21 is aligned with the positioning hole 13 along the second direction, and the front end of the locking member 3 can be inserted into the positioning hole 13; when the locking member 3 is in the locked state, the locking member 3 is fixed to the first positioning part 1.

[0026] Specifically, the assembly steps of the display screen are described using two adjacent display screen units as an example. One of the two adjacent display screen units is defined as the first display screen unit, and the other as the second display screen unit. When the first display screen unit and the second display screen unit need to be spliced ​​along a first direction, as follows... Figure 6As shown, first, switch the locking member 3 on the display housing 100 of the first display unit to the unlocked state. The front end of the locking member 3 is received in the through hole 21 of the positioning pin 2. The operator moves the locking member 3 along the first direction to drive the positioning pin 2 to move to the second position along the first direction, as shown. Figure 9 and Figure 10 As shown, the head of the positioning pin 2 protrudes from the first pin hole 11 of the first pin, and the through hole 21 of the positioning pin 2 is aligned with the positioning hole 13 in the second direction. Then, the front end of the locking member 3 is inserted into the positioning hole 13, and the locking member 3 is switched to the locked state, so that the locking member 3 is fixed to the first positioning part 1, so that the positioning pin 2 is held in the second position. Finally, the second display unit is assembled and fixed with the first display unit with the second insertion hole on the display housing 100 aligned with the positioning pin 2 of the first display unit.

[0027] By following the steps described above, multiple display screen units are assembled together to form the desired display screen.

[0028] Understandably, the second pin hole of the second positioning part 5 of the first display unit is used to insert the positioning pin 2 on the adjacent display unit on the other side.

[0029] The first display unit and the second display unit are connected by a hinge or arc lock, which is common knowledge in the field and will not be described in detail here.

[0030] When it is necessary to replace the display unit in the middle of the display screen, the operator directly operates the locking member 3 on the rear side of the display screen housing 100, switches the locking member 3 to the unlocked state, moves the front end of the locking member 3 out of the positioning hole 13, and then, as... Figure 5 As shown, the locking member 3 drives the positioning pin 2 to move along the first direction to the first position, so that the positioning pin 2 is retracted into the first pin hole 11, releasing the positioning cooperation between the display unit and the adjacent display unit, and preventing the positioning pin 2 from interfering with the removal of the display unit from the middle of the display screen. Thus, the middle display unit can be removed directly from the display screen without having to be disassembled from the edge of the display screen.

[0031] Before installing the new display unit into the display, such as Figure 6 As shown, first retract the positioning pin 2 of the new display unit into the first pin hole 11, then install the new display unit in the desired replacement position of the display. Then, as... Figure 9 and Figure 10 As shown, by moving the locking member 3, the positioning pin 2 extends out of the first pin hole 11 and is inserted into the second socket of the adjacent display unit.

[0032] In the display unit of this application, a positioning component is installed in the first positioning part 1. A positioning pin 2 is inserted into the first pin hole 11 of the first positioning part 1 along a first direction. The first positioning part 1 has a positioning groove 12 and a positioning hole 13 on opposite sides of the first pin hole 11 along a second direction. A locking member 3 passing through the positioning groove 12 and the through hole 21 can drive the positioning pin 2 to move between a first position and a second position. When the positioning pin 2 is in the second position, the head end protrudes from the first pin hole 11, and the front end of the locking member 3 can be inserted into the positioning hole 13 that is directly opposite the through hole 21. After the locking member 3 switches to the locked state, the locking member 3 is fixed to the first positioning part 1 so that the positioning pin 2 remains in the extended state. Thus, adjacent display units can be assembled by aligning the positioning pin 2 with the second pin hole of the second positioning part 5. When it is necessary to replace the middle display unit, switch the locking member 3 to the unlocked state. The locking member 3 drives the positioning pin 2 to move to the first position along the first direction, so that the positioning pin 2 retracts into the first pin hole 11, releasing the positioning cooperation between the display unit and the adjacent display unit, so that the middle display unit can be directly removed from the display.

[0033] Moreover, the locking element 3 drives the positioning pin 2 to move between the first position and the second position, eliminating the need to operate the positioning pin 2 in the first pin hole 11, making operation convenient.

[0034] In one embodiment, the locking member 3 is a bolt, which is threadedly connected to the locating pin 2 and / or the first locating part 1, such as... Figure 9 and Figure 10 As shown, when the locating pin 2 is in the second position, tightening the bolt causes the head of the bolt to press against the first locating part 1, and the shank 31 of the bolt to be inserted into the locating hole 13, so that the bolt switches to the locked state, thereby allowing the locating pin 2 to remain in the extended state.

[0035] When it is necessary to unlock the locking part 3, loosen the bolt, and the shank 31 of the bolt moves out of the positioning hole 13, so that the head of the bolt has a gap with the rear surface of the first positioning part 1. The bolt can move in the first direction. The bolt's locked state and unlocked state can be switched by turning the bolt. The operation is simple.

[0036] In one embodiment, such as Figure 6 and Figure 7 As shown, the through hole 21 includes an internally threaded hole 211 and a guide hole 212 distributed along its centerline. The guide hole 212 connects the internally threaded hole 211 and the positioning groove 12. The cross-sectional shape of the guide hole 212 is larger than that of the internally threaded hole 211. The guide hole 212 is used to guide the shank 31 of the bolt to pass through the internally threaded hole 211 to facilitate the assembly of the bolt and the positioning pin 2.

[0037] Furthermore, since the bolt is threadedly connected to the locating pin 2, even after the bolt is switched to the unlocked state, it can still be threadedly connected to the locating pin 2, so that the bolt can be hung on the first locating part 1, thus preventing the bolt from falling off.

[0038] In other embodiments, a threaded sleeve can be fixed inside the through hole 21 to form an internal threaded hole 211 that mates with the bolt thread.

[0039] In one embodiment, such as Figures 3 to 5 As shown, the positioning groove 12 includes a slot 121 and a recess 122. The slot 121 is an elongated groove extending along a first direction, and the recess 122 is located at the end of the slot 121 away from the second positioning part 5. The slot 121 penetrates the first positioning part 1 along a second direction, and the recess 122 penetrates the rear surface of the first positioning part 1 along the second direction.

[0040] The bolt shank 31 passes through the slot 121, such as... Figure 5 As shown, in the first position, the bolt is attached to the end of the slot 121 near the second positioning part 5. Figure 10 As shown, in the second position, the head of the bolt in the locked state is submerged in the groove 122.

[0041] When the head of the bolt in the locked state is submerged in the groove 122, the head can fit tightly against the bottom surface of the groove 122, which can avoid local stress concentration caused by head tilting, and make the preload more evenly transmitted to the locating pin 2, reducing the possibility of locating pin 2 tilting. In one embodiment, such as Figure 8 and Figure 10 As shown, the head of the bolt includes a clamping part 32 and a turning part 33. The shank 31, the clamping part 32 and the turning part 33 are connected in sequence along the axial direction of the bolt. The clamping part 32 is cylindrical and its diameter is larger than that of the shank 31. The shank 31 or the clamping part 32 is provided with external threads.

[0042] In the second position, the bolt is tightened by the screwing part 33, the clamping part 32 sinks into the groove 122, and the screwing part 33 is located outside the positioning slide 12, so that the operator can tighten the bolt by hand by the screwing part 33.

[0043] Figure 10 The bolt shown has an external thread on its shank 31, and the bolt is threadedly connected to the locating pin 2. In other embodiments, an external thread can be provided on the clamping part 32, and correspondingly, the countersunk groove 122 is an internally threaded hole 211. In the locked state, the clamping part 32 is threadedly connected to the internally threaded hole 211.

[0044] In one embodiment, the end face of the head is provided with a torsion groove, allowing the operator to tighten the bolt by inserting a tool into the torsion groove. Specifically, the torsion groove can be a slotted groove or a Phillips head groove.

[0045] In one embodiment, such as Figure 7 As shown, the outer periphery of the rotating part 33 is provided with an anti-slip structure 44 to prevent slippage when tightening the bolt by hand.

[0046] Specifically, the anti-slip structure 44 is a knurled or vertical toothed pattern. Of course, the anti-slip structure 44 can also be a raised structure on the outer peripheral surface of the rotating part 33. The raised structures are distributed at intervals along the outer peripheral surface of the rotating part 33. When two raised structures are provided, the head is in a straight line shape; when three raised structures are provided, the head is in a Y shape; and when four raised structures are provided, the head is in a cross shape.

[0047] In one embodiment, such as Figure 2 and Figure 7 As shown, the outer peripheral surface of the positioning pin 2 is provided with a first anti-rotation surface 22 extending in a first direction. The cross-sectional shape of the first pin hole 11 matches the cross-sectional shape of the positioning pin 2. The inner wall surface of the first pin hole 11 has a second anti-rotation surface 111 extending in the first direction. The first anti-rotation surface 22 and the second anti-rotation surface 111 are opposite to each other, and the second anti-rotation surface 111 restricts the positioning pin 2 from rotating within the first pin hole 11. The term "matching" means that the cross-sectional dimension of the first pin hole 11 is slightly larger than the cross-sectional dimension of the positioning pin 2.

[0048] After the positioning pin 2 is inserted into the first insertion hole with the through hole 21 aligned with the positioning hole 13 in a circumferential posture, the second anti-rotation surface 111 can restrict the positioning pin 2 from rotating in the first pin hole 11, so as to avoid the situation where the through hole 21 of the positioning pin 2 and the positioning hole 13 are misaligned in the circumferential direction, resulting in the locking member 3 being unable to be inserted into the positioning hole 13.

[0049] In one embodiment, such as Figure 7 As shown, the head end of the positioning pin 2 is provided with a chamfer 23, which is used to guide the positioning pin 2 into the second pin hole. The chamfer 23 can be a beveled chamfer or a rounded corner.

[0050] In one embodiment, such as Figure 6 As shown, it also includes a display panel 200. The display housing 100 includes a bottom shell 101 and a frame 102. The bottom shell 101 supports and fixes the display panel 200. The bottom shell 101 is mounted on the frame 102. The frame 102 has a first positioning part 1 and a second positioning part 5.

[0051] Understandably, the display panel 200 is used to display visual images, text or video, and typically includes a PCB board and multiple LED beads mounted on the PCB board. The PCB board can control the on / off state, brightness and color changes of the LED beads.

[0052] It should be noted that when multiple display screen units are connected by hinges, hinge seats are fixed on both sides of the back of the bottom shell 101 along the first direction. The hinge passes through the hinge seat of each display screen unit in sequence along the first direction to connect the multiple display screen units together. At this time, the hinge seat on one side of the first direction may have a first positioning part 1, and the hinge seat on the other side of the first direction may have a second positioning part 5.

[0053] In other embodiments, the first pin hole 11 and the second pin hole may be provided on the bottom shell 101.

[0054] In one embodiment, such as Figure 1 As shown, the upper side of the display screen housing 100 has a plurality of first positioning parts 1, each of which is equipped with a positioning component. The lower side of the display screen housing 100 has a plurality of second positioning parts 5. The first pin holes 11 of the plurality of first positioning parts 1 are distributed at intervals along the width direction of the display screen housing 100. The second pin holes of the plurality of second positioning parts 5 are distributed at intervals along the width direction of the display screen housing 100. The plurality of first pin holes 11 and the plurality of second pin holes correspond one-to-one along the height direction of the display screen housing 100.

[0055] In other embodiments, one side of the display housing 100 in the left-right direction may have a first positioning part 1, and the other side of the display housing 100 in the left-right direction may have a second positioning part 5, so that adjacent display units assembled in the left-right direction can be positioned and matched by the positioning component.

[0056] In other embodiments, the positioning hole 13 is an internally threaded hole 211, and the bolt can be threaded into the positioning hole 13. Of course, the positioning hole 13 and the through hole 21 can both be internally threaded holes 211.

[0057] In other embodiments, the locking member 3 can be fixed to the first positioning part 1 by a hook structure. Specifically, a hook can be provided on the inner wall of the positioning hole 13, and a groove 121 can be provided on the outer wall of the locking member 3. In the second position, the locking member 3 is inserted into the positioning hole 13 along the second direction, and the hook is engaged with the groove 121. When it is necessary to switch the locking member 3 to the unlocked state, the locking member 3 is pulled outward along the second direction, so that the hook is disengaged, and the front end of the locking member 3 is moved out of the positioning hole 13.

[0058] In addition, one embodiment of the present invention provides a display screen, which includes multiple assembled display screen units. The structure of the display screen units is the same as that of the display screen units in any of the above embodiments, and will not be described again here.

[0059] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A display screen unit, characterized in that, The device includes a display screen housing and a positioning assembly. The display screen housing has a first positioning portion and a second positioning portion disposed opposite to each other along a first direction. The first positioning portion has a first pin hole, a positioning hole, and a positioning groove. The first pin hole penetrates the outer surface of the first positioning portion along the first direction. The positioning hole and the positioning groove are located on opposite sides of the first pin hole along a second direction. The positioning groove passes through the first positioning portion along the second direction and communicates with the first pin hole. The positioning hole penetrates the inner wall of the first pin hole along the second direction. The second positioning portion has a second pin hole directly opposite the first pin hole. The second pin hole penetrates the outer surface of the second positioning portion along the first direction. The first direction is either the width or height direction of the display screen housing, and the second direction is the front-rear direction of the display screen housing. The positioning component includes a positioning pin and a locking member. The positioning pin is inserted into the first pin hole and has a through hole extending along the second direction. The locking member is sequentially inserted into the positioning groove and the through hole. The locking member has a locked state and an unlocked state. When the locking member is in the unlocked state, it can drive the positioning pin to move between a first position and a second position along the first direction. In the first position, the front end of the locking member is accommodated in the through hole, and the positioning pin is retracted into the first pin hole. In the second position, the head end of the positioning pin protrudes from the first pin hole, the through hole is directly opposite the positioning hole along the second direction, and the front end of the locking member can be inserted into the positioning hole. When the locking member is in the locked state, it is fixed to the first positioning part.

2. The display unit according to claim 1, characterized in that, The locking component is a bolt, which is threadedly connected to the positioning pin and / or the first positioning part; when the positioning pin is in the second position, the bolt is tightened, the head of the bolt presses against the first positioning part, the shank of the bolt is inserted into the positioning hole, and the bolt is switched to the locked state.

3. The display unit according to claim 2, characterized in that, The perforation includes an internally threaded hole and a guide hole distributed along its centerline. The guide hole connects the internally threaded hole and the positioning groove. The cross-sectional shape of the guide hole is larger than that of the internally threaded hole. The guide hole is used to guide the shank of the bolt into the internally threaded hole.

4. The display unit according to claim 2, characterized in that, The positioning groove includes a slot and a recess. The slot is an elongated strip extending along the first direction, and the recess is located at the end of the slot away from the second positioning part. The slot passes through the first positioning part along the second direction, and the recess passes through the rear surface of the first positioning part along the second direction. The shank of the bolt passes through the slot. In the first position, the bolt is hung on one end of the slot near the second positioning part. In the second position, the head of the bolt in the locked state is sunk into the groove.

5. The display unit according to claim 4, characterized in that, The head of the bolt includes a clamping part and a turning part. The shank, clamping part and turning part are connected in sequence along the axial direction of the bolt. The clamping part is cylindrical and its diameter is larger than that of the shank. The shank or the clamping part is provided with external threads. In the second position, the bolt is tightened by the turning part, and the clamping part sinks into the groove.

6. The display unit according to claim 5, characterized in that, The outer periphery of the rotating part is provided with an anti-slip structure.

7. The display unit according to claim 1, characterized in that, The outer peripheral surface of the positioning pin is provided with a first anti-rotation surface extending along the first direction. The cross-sectional shape of the first pin hole matches the cross-sectional shape of the positioning pin. The inner wall surface of the first pin hole has a second anti-rotation surface extending along the first direction. The first anti-rotation surface and the second anti-rotation surface are opposite to each other. The second anti-rotation surface restricts the positioning pin from rotating within the first pin hole.

8. The display unit according to claim 1, characterized in that, The head end of the positioning pin is chamfered, and the chamfer is used to guide the positioning pin to be inserted into the second pin hole of the adjacent display unit.

9. The display unit according to claim 1, characterized in that, It also includes a display panel, the display housing includes a bottom shell and a frame, the bottom shell supports and fixes the display panel, the bottom shell is mounted on the frame, and the frame has a first positioning part and a second positioning part.

10. A display screen, characterized in that, The display unit comprises multiple display units assembled as described in any one of claims 1 to 9, wherein in any two adjacent display units assembled along the first direction, the head end of the positioning pin of one display unit is inserted into the second pin hole of the other display unit.

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