Display screen maintenance lock and display screen

Abstract

The utility model relates to the technical field of LED display screens, in particular to a display screen maintenance lock which comprises a lock rod and a lockset, the lockset comprises a shell, a magnetic attraction piece, a first elastic piece and a lock plate, a movable groove is formed in the shell, the first elastic piece is arranged in the movable groove, the magnetic attraction piece is movably arranged in the movable groove, and the lock plate is arranged in the movable groove. The magnetic attraction piece is connected with the first elastic piece, the lock rod is detachably arranged on the shell, a lock groove is formed in the lock rod, the lock plate is provided with a locking part, a linkage part and a rotating center part, the linkage part is in transmission connection with the magnetic attraction piece, and the rotating center part is rotationally connected with the shell; when the magnetic attraction piece moves, the linkage part is driven to move, and the locking piece rotates with the rotating center part as the rotating center, so that the locking part is clamped with or separated from the locking groove. The utility model further provides a display screen which comprises the display screen maintenance lock.

Description

Technical Field

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

[0002] At present, the connection between the LED display cabinet and the display module is usually fixed by screws, rotating locks or magnetic adsorption.

[0003] The screw fixing method is to fix the display module directly to the box with screws. The connection is safe and reliable, but it has the disadvantages of cumbersome disassembly and maintenance and can only be disassembled from the back of the display.

[0004] The rotary lock fixing method uses a rotatable locking mechanism in conjunction with the box structure to achieve the connection between the box and the display module. Usually, the rotary locking mechanism is operated on the back of the box to loosen or tighten it for rear maintenance. The display screen connected in this way is easy to disassemble and maintain, but this method has limitations. This method requires a maintenance hole to be set on the front of the display screen module to achieve front maintenance. When this method is applied to display products with smaller spacing, the size of the maintenance hole is limited or even impossible to open a maintenance hole.

[0005] The magnetic adsorption fixation method uses the magnetic effect of magnets to achieve the connection and fixation between the box and the display module. However, the magnetism of the magnet decays significantly over time, and the module magnet may fail as its magnetism decays, resulting in safety accidents such as the module falling off.

[0006] In summary, the connection and fixation between the cabinet and the display screen module of the existing LED display screen has the problems of low reliability and difficult maintenance. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a display screen maintenance lock to solve the problems of low connection reliability and difficult maintenance between the box body and the display module of the existing LED display screen.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is: a display screen maintenance lock, which includes a locking rod and a lock, the lock includes a shell, a magnetic member, a first elastic member and a locking plate, the shell is provided with a movable groove, the first elastic member is arranged in the movable groove, the magnetic member is movably arranged in the movable groove, the magnetic member is connected to the first elastic member, the locking rod is detachably arranged on the shell, the locking rod is provided with a locking groove, the locking plate is provided with a locking part, a linkage part and a rotation center part, the linkage part is transmission-connected with the magnetic member, and the rotation center part is rotatably connected with the shell; wherein, when the magnetic member moves, it drives the linkage part to move, and the locking plate rotates with the rotation center part as the rotation center, so that the locking part is engaged with or disengaged from the locking groove.

[0009] Furthermore, the lock includes locking plates arranged in pairs, one end of the locking plates is provided with the locking portion, the locking portions of the locking plates arranged in pairs are arranged relative to each other to enclose a lock opening, and the locking rod is detachably arranged in the lock opening; wherein, when the magnetic attraction member moves, it drives the linkage portion to move, and the locking plates rotate with the rotation center portion as the rotation center and cause the lock opening to close or open.

[0010] Furthermore, the linkage parts of the locking plates arranged in pairs are arranged to overlap.

[0011] Furthermore, the locking plate is an L-shaped locking plate, one end of the L-shaped locking plate is provided with the locking portion, the other end of the L-shaped locking plate is provided with the rotation center portion, and the linkage portion is provided at the corner of the L-shaped locking plate.

[0012] Furthermore, the rotation center portion is a rotation center limiting hole opened on the locking plate, and a rotation center limiting column is provided on the shell, and the rotation center limiting column can rotatably pass through the rotation center limiting hole, wherein there is a gap between the outer contour of the rotation center limiting column and the inner contour of the rotation center limiting hole.

[0013] Furthermore, the lock also includes a slider and a second elastic member, a slide groove is also provided on the shell, the second elastic member is arranged in the slide groove, the slider is slidably arranged in the slide groove, the slider is connected to the second elastic member, the magnetic member is linked to the second elastic member, and the linkage part is connected to the slider so that the slider drives the linkage part to move.

[0014] Furthermore, the magnetic attraction member is provided with a first wedge-shaped surface, and the sliding block is provided with a second wedge-shaped surface abutting against the first wedge-shaped surface.

[0015] Furthermore, the lock also includes a cover plate, which is covered on the shell, and a through hole and a guide hole are respectively opened on the cover plate. The locking rod can be detachably passed through the through hole. The linkage part is a linkage limit hole opened on the locking plate. A linkage limit column is provided on the slider, and the linkage limit column passes through the linkage limit hole and the guide hole in sequence, and the linkage limit column can slide along the length direction of the guide hole.

[0016] Furthermore, the locking rod is provided with a first chamfered portion, and the locking portion is provided with a second chamfered portion that cooperates with the first chamfered portion.

[0017] The utility model also provides a display screen, including the above-mentioned display screen maintenance lock, the display screen maintenance lock includes a locking rod and a lock, and also includes a box and a display module, the locking rod is arranged on the box, and the lock is arranged on the display module, so that the box and the display module are connected and fixed through the display screen maintenance lock.

[0018] The beneficial effect of the utility model is that the display screen maintenance lock described in the utility model can use the magnetic attraction force of the external magnetic tool and the elastic force of the first elastic member as the power to drive the magnetic member to move. It can not only drive the lock piece to rotate by the magnetic attraction of the magnetic tool to move the magnetic member, but also drive the locking part to disengage from the lock slot to achieve the unlocking function; it can also drive the magnetic member to reset by the elastic force of the first elastic member to ensure the reliability of the engagement between the locking part and the lock slot. The display screen maintenance lock provided by the utility model can achieve the function of controlling the unlocking of the display screen maintenance lock by magnetically absorbing the magnetic member through the external magnetic tool. The display screen maintenance lock is applied to the display module without opening a maintenance hole. The display screen maintenance lock provided by the utility model can be applied in a variety of display screen application scenarios, especially suitable for small-pitch display screens. The display screen maintenance lock can make the maintenance operation of the display screen more convenient and quick, and improve the safety and reliability of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the display screen of the utility model in one embodiment;

[0020] Figure 2 for Figure 1 A magnified view of part A;

[0021] Figure 3 Schematically shows Figure 1 The structure comparison diagram of the lock in the locked state and the open state shown in FIG.

[0022] Figure 4 for Figure 1 Schematic diagram of the working principle of the locking piece shown in;

[0023] Figure 5 for Figure 1 A cross-sectional view of the display screen;

[0024] Figure 6 for Figure 5 An enlarged view of part B in which the locking rod and the lock are disengaged;

[0025] Figure 7 for Figure 5 An enlarged view of part B in which the locking rod is in conflict with the locking plate and the locking plate is not opened;

[0026] Figure 8 for Figure 5 An enlarged view of part B in which the locking rod and the locking plate are in conflict with each other and the locking plate is opened;

[0027] Fig. 9 for Figure 5 An enlarged view of part B in which the locking rod and the locking plate are engaged;

[0028] Fig.10 for Figure 5 An enlarged view of part B in the unlocking state using the magnetic suction tool;

[0029] Fig.11 for Figure 1 The structural diagram of the housing shown in ;

[0030] Fig.12 for Figure 1 A cross-sectional view of the housing shown in ;

[0031] Fig.13 for Figure 1 The structural diagram of the slider shown in .

[0032] Description of labels:

[0033] 1. Locking rod; 11. Locking groove; 12. First chamfered portion;

[0034] 2. Locks;

[0035] 21, housing; 211, movable groove; 2111, magnetic member receiving groove; 2112, first elastic member receiving groove; 212, slide groove; 2121, slider receiving groove; 2122, second elastic member receiving groove; 213, rotation center limiting column; 214, first mounting groove; 215, second mounting groove; 216, limiting wall;

[0036] 22. Magnetic attraction member; 221. First wedge-shaped surface;

[0037] 23. a first elastic member;

[0038] 24, locking piece; 241, locking part; 2411, second chamfered part; 242, linkage part; 243, rotation center part; 244, locking mouth;

[0039] 25. Sliding block; 251. Second wedge-shaped surface; 252. Linkage limiting column; 253. Elastic member connecting portion; 254. Elastic member limiting column;

[0040] 26. a second elastic member;

[0041] 27, cover plate; 271, through hole; 272, guide hole; 273, positioning hole;

[0042] 3. Box body;

[0043] 4. Display module;

[0044] 5. Magnetic suction tool. DETAILED DESCRIPTION

[0045] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0046] Please refer to Figures 1 to 13 , a display screen maintenance lock, comprising a locking rod 1 and a lock 2, the lock 2 comprising a shell 21, a magnetic member 22, a first elastic member 23 and a locking plate 24, the shell 21 is provided with a movable groove 211, the first elastic member 23 is arranged in the movable groove 211, the magnetic member 22 is movably arranged in the movable groove 211, the magnetic member 22 is connected to the first elastic member 23, the locking rod 1 is detachably arranged on the shell 21, the locking rod 1 is provided with a lock groove 11, the locking plate 24 is provided with a locking portion 241, a linkage portion 242 and a rotation center portion 243, the linkage portion 242 is transmission-connected with the magnetic member 22, and the rotation center portion 243 is rotatably connected with the shell 21; wherein, when the magnetic member 22 moves, the linkage portion 242 is driven to move, and the locking plate 24 rotates with the rotation center portion 243 as the rotation center, so that the locking portion 241 is engaged with or disengaged from the lock groove 11.

[0047] The structural principle of the utility model is briefly described as follows: the magnetic attraction member 22 of the display screen maintenance lock provided by the utility model can move between the first position and the second position of the movable groove 211; in the initial state, the first elastic member 23 is in an extended state, so that the magnetic attraction member 22 is located in the first position, and the locking portion 241 is engaged with the slot; when unlocking is required, the magnetic attraction member 22 can be driven to move from the first position to the second position by the magnetic attraction force of the external magnetic attraction tool 5, and the first elastic member 23 is in a compressed state, and the magnetic attraction member 22 drives the linkage portion 242 to move, so that the locking plate 24 rotates with the rotating shaft portion as the rotation center, so that the locking portion 241 is disengaged from the lock slot 11, and the locking rod 1 can be removed from the lock 2 at this time; when the external magnetic attraction tool 5 is removed, the first elastic member 23 elastically recovers, so that the magnetic attraction member 22 is reset to the first position from the second position to ensure the reliability of the engagement of the locking plate 24 with the locking rod 1.

[0048] The display screen maintenance lock can be actually applied to a display screen, and the locking rod 1 and the lock 2 are respectively arranged on the display screen box 3 and the display module. In actual application, the display screen can be enabled to realize the front maintenance function through the magnetic suction tool 5, and there is no need to open a maintenance hole on the display module. After the external magnetic suction tool 5 is removed, the first elastic member 23 can drive the locking piece 24 to reset, thereby ensuring the reliability of the display screen maintenance lock fixing the box 3 and the display module.

[0049] As can be seen from the above description, the beneficial effect of the utility model is that the display screen maintenance lock described in the utility model can use the magnetic attraction force of the external magnetic attraction tool 5 and the elastic force of the first elastic member 23 as the power to drive the magnetic attraction member 22 to move. It can not only drive the lock plate 24 to rotate by magnetically attracting the magnetic attraction member 22 through the magnetic attraction tool 5, and drive the locking part 241 to disengage from the lock slot 11 to achieve the unlocking function; it can also drive the magnetic attraction member 22 to reset through the elastic force of the first elastic member 23 to ensure the reliability of the engagement between the locking part 241 and the lock slot 11. The display screen maintenance lock provided by the utility model can achieve the function of controlling the unlocking of the display screen maintenance lock by magnetically attracting the magnetic attraction member 22 through the external magnetic attraction tool 5. The display screen maintenance lock is applied to the display module 4 without opening a maintenance hole. The display screen maintenance lock provided by the utility model can be applied in a variety of display screen application scenarios, especially suitable for small-pitch display screens. The display screen maintenance lock can make the maintenance operation of the display screen more convenient and quick, and improve the safety and reliability of the display screen.

[0050] Furthermore, the lock 2 includes locking plates 24 arranged in pairs, one end of the locking plates 24 is provided with the locking portion 241, the locking portions 241 of the locking plates 24 arranged in pairs are arranged relative to each other to enclose a locking opening 244, and the locking rod 1 is detachably arranged in the locking opening 244; wherein, when the magnetic suction member 22 moves, it drives the linkage portion 242 to move, and the locking plates 24 rotate with the rotation center portion 243 as the rotation center and causes the locking opening 244 to close or open.

[0051] It can be seen from the above description that, when not subjected to any external force, the first elastic member 23 is in an extended state, the magnetic member 22 is in the first position, and the lock port 244 is in a closed state. The card slot of the lock rod 1 is clamped in the lock port 244. The lock port 244 has a reliable fixing effect on the lock rod 1, which can improve the reliability of the display maintenance lock and prevent safety accidents such as module falling off. When unlocking is required, the external magnetic suction tool 5 is used to drive the magnetic member 22 to move and compress the first elastic member 23, and the lock piece 24 rotates around the rotation center to open the lock port 244. At this time, the card slot is disengaged from the buckle, and the lock rod 1 can be taken out from the lock port 244.

[0052] Furthermore, the linkage portions 242 of the locking pieces 24 arranged in pairs are arranged to overlap.

[0053] From the above description, it can be seen that the overlapping arrangement of the linkage parts 242 of the paired locking pieces 24 can be beneficial to improving the structural integration of the display screen maintenance lock and reducing its overall volume; in addition, it can also ensure that the movement stroke of the linkage parts 242 of the paired locking pieces 24 is consistent, so as to ensure that the locking parts 241 of the paired locking pieces 24 are closed or opened at the same time, thereby improving the reliability and stability of the display screen maintenance lock.

[0054] Furthermore, the locking piece 24 is an L-shaped locking piece 24 , one end of the L-shaped locking piece 24 is provided with the locking portion 241 , the other end of the L-shaped locking piece 24 is provided with the rotation center portion 243 , and the corner of the L-shaped locking piece 24 is provided with the linkage portion 242 .

[0055] Furthermore, the rotation center portion 243 is a rotation center limiting hole opened on the locking plate 24, and a rotation center limiting column 213 is provided on the shell 21, and the rotation center limiting column 213 can rotatably pass through the rotation center limiting hole, wherein there is a gap between the outer contour of the rotation center limiting column 213 and the inner contour of the rotation center limiting hole.

[0056] In an optional implementation of the present invention, as Figure 4 As shown, the rotation center portion 243 is a rotation center limiting hole opened at the corner of the L-shaped locking piece 24, and a rotation center limiting column 213 is provided on the housing 21. The rotation center limiting column 213 can rotatably pass through the rotation center limiting hole. The linkage portion 242 of the L-shaped locking piece 24 is connected to the magnetic member 22 in a transmission manner, so that the magnetic member 22 drives the linkage portion 242 to move along a straight line during the movement, and the locking piece 24 rotates around the rotation center limiting column 213, that is, the locking piece 24 rotates with the axial direction of the rotation center limiting column 213 as the rotation axis. Specifically, the linkage portion 242 of the locking piece 24 can move linearly between the position of point a and the position of point b under the transmission action of the magnetic member 22, and drives the locking piece 24 to rotate, so that the lock port 244 rotates to a locked state or an open state, and when the linkage portion 242 is located at the position of point a, the lock port 244 is in a locked state, and when the linkage portion 242 is located at the position of point b, the lock port 244 is in an open state.

[0057] Specifically, when the linkage part 242 of the locking plate 24 moves from the position of point a to the position of point b, the rotation radius R of the locking plate 24 remains unchanged. When the slider 25 moves horizontally to the right by a distance value X, it is necessary to ensure that the position of the linkage part 242 at the position of point a and the position of point b is kept on the same straight line. Therefore, the theoretical rotation trajectory of the linkage part 242 of the locking plate 24 is inconsistent with the actual rotation trajectory, that is, the rotation center limit hole of the locking plate 24 will be offset by P. To ensure that the locking plate 24 can rotate according to the design requirements and the rotation process of the locking plate 24 is smooth, a certain gap should be left between the rotation center limit hole of the locking plate 24 and the rotation center limit column 213. Therefore, the diameter of the rotation center limit column 213 is D0, and the diameter of the rotation center limit hole of the locking plate 24 is D1. To meet the above requirements, its design size is: (D1-D0) / 2>P. At the same time, in the structural dimensions of the above design, when the linkage portion 242 of the locking piece 24 moves horizontally by a distance value X, the horizontal movement distance value X of the linkage portion 242 is much greater than the rotation center offset distance value P, and the offset distance value L of the locking portion 241 is much greater than the horizontal movement distance value X of the linkage portion 242. Therefore, when the linkage portion 242 of the locking piece 24 slightly changes the horizontal movement distance value X, the offset distance value L of the locking portion 241 changes greatly, which can meet the functions of the locking piece 24 structure to lock and release, and the change in the horizontal movement distance value X of the linkage portion 242 has little effect on the offset distance value P during rotation, which does not affect the rotation of the locking piece 24.

[0058] Of course, in some other optional embodiments of the present invention, the rotation center portion 243 of the L-shaped locking plate 24 can be arranged at its corner, and the linkage portion 242 can be arranged on the other end thereof away from the locking portion 241; or, a certain gap can be reserved between the connection between the linkage portion 242 of the L-shaped locking plate 24 and the component it is linked to, so that the connection between the linkage portion 242 and the component it is linked to can produce a smaller offset distance value, so as to ensure the smooth rotation of the locking plate 24.

[0059] Furthermore, the lock 2 also includes a slider 25 and a second elastic member 26. A slide groove 212 is also provided on the shell 21. The second elastic member 26 is arranged in the slide groove 212. The slider 25 is slidably arranged in the slide groove 212. The slider 25 is connected to the second elastic member 26. The magnetic member 22 is linked to the second elastic member 26. The linkage part 242 is connected to the slider 25 so that the slider 25 drives the linkage part 242 to move.

[0060] As can be seen from the above description, the locking piece 24 and the magnetic member 22 are connected to each other by means of the slider 25. Figure 3 and Figure 6It is not difficult to see that in some preferred embodiments of the present invention, the locking piece 24 drives its linkage portion 242 to perform linear reciprocating motion through the linear reciprocating motion of the slider 25, so that the locking piece 24 rotates around the rotation center portion 243 as the rotation center, thereby driving the locking portion 241 of the locking piece 24 to open and close.

[0061] The second elastic member 26 assists in the movement direction of the slider 25; wherein, the elastic force of the first elastic member 23 can be set to be greater than the elastic force of the second elastic member 26, so that the first elastic member 23 is in an extended state in the initial state, the second elastic member 26 is in a compressed state, and the lock 244 is in a closed state; when unlocking is required, the external magnetic tool 5 is used to drive the magnetic member 22 to move and compress the first elastic member 23, and the second elastic member 26 restores the elastic deformation to drive the slider 25 to drive the linkage part 242 to move, and the locking piece 24 rotates with the rotation center part 243 as the rotation center, so that the lock 244 changes from a closed state to an open state; when the external magnetic tool 5 is removed, since the elastic force of the first elastic member 23 is greater than the elastic force of the second elastic member 26, the first elastic member 23 restores the elastic deformation and drives the magnetic member 22 to reset, and the magnetic member 22 drives the slider 25 to reset, and the second elastic member 26 is in a compressed state.

[0062] Furthermore, the magnetic attraction member 22 is provided with a first wedge-shaped surface 221 , and the sliding block 25 is provided with a second wedge-shaped surface 251 abutting against the first wedge-shaped surface 221 .

[0063] It can be seen from the above description that the slider 25 contacts the magnetic top block through the wedge surface. When the magnetic component 22 moves in the vertical direction, the first wedge surface 221 of the magnetic component 22 cooperates with the second wedge surface 251 of the slider 25 to convert the movement of the magnetic component 22 in the vertical direction into the movement of the slider 25 in the horizontal direction; correspondingly, when the slider 25 moves in the horizontal direction under the action of an external force, the first wedge surface 221 of the magnetic component 22 cooperates with the second wedge surface 251 of the slider 25 to convert the movement of the slider 25 in the horizontal direction into the movement of the magnetic component 22 in the vertical direction.

[0064] Furthermore, the lock 2 also includes a cover plate 27, which is covered on the shell 21, and is respectively provided with a through hole 271 and a guide hole 272. The locking rod 1 can be detachably passed through the through hole 271. The linkage part 242 is a linkage limit hole formed on the locking plate 24. A linkage limit column 252 is provided on the slider 25. The linkage limit column 252 passes through the linkage limit hole and the guide hole 272 in sequence, and the linkage limit column 252 can slide along the length direction of the guide hole 272.

[0065] It can be seen from the above description that the guide hole 272 of the cover plate 27 can guide and limit the sliding direction of the slider 25.

[0066] In some preferred embodiments of the present invention, the length of the linkage limit column 252 can be increased so that the linkage limit column 252 can extend to the back of the display screen, so that the display screen maintenance lock can be manually unlocked by the linkage limit column 252 at the back of the display module 4.

[0067] Furthermore, the slide groove 212 is disposed adjacent to the movable groove 211 , and the slide groove 212 extends in a direction away from the movable groove 211 , and the slider 25 slides along the length direction of the slide groove 212 .

[0068] Furthermore, the locking rod 1 is provided with a first chamfered portion 12 , and the locking portion 241 is provided with a second chamfered portion 2411 that cooperates with the first chamfered portion 12 .

[0069] As can be seen from the above description, during the installation of the locking rod 1, the first chamfered portion 12 of the locking rod 1 conflicts with the second chamfered portion 2411 of the locking plate 24, so that the locking rod 1 pushes the locking plate 24 open, and the locking plate 24 rotates around the rotation center portion 243 as the rotation center, so that the locking plate 24 rotates to the open state of the lock port 244, and the linkage portion 242 produces linear movement, so that the linkage portion 242 drives the magnetic suction member 22 to move and compress the first elastic member 23; the locking rod 1 continues to penetrate deeper, and when the locking rod 1 reaches the position where the locking groove 11 and the lock port 244 are relative, the conflicting effect of the first chamfered portion 12 of the locking rod 1 on the second chamfered portion 2411 of the locking plate 24 disappears, and at this time the first elastic member 23 restores its deformation to reset the magnetic suction member 22, and the magnetic suction member 22 drives the locking plate 24 to rotate around the axis of the rotation center portion 243 as the rotation center, so that the locking plate 24 rotates to the locked state of the lock port 244.

[0070] The utility model also provides a display screen, including the above-mentioned display screen maintenance lock, the display screen maintenance lock includes a locking rod 1 and a lock 2, and also includes a box 3 and a display module 4, the locking rod 1 is arranged on the box 3, and the lock 2 is arranged on the display module 4, so that the display box 3 and the display module 4 are connected and fixed through the display screen maintenance lock.

[0071] It can be seen from the above description that the display screen provided by the utility model at least has all the beneficial effects of the above display screen maintenance lock.

[0072] Furthermore, an unlocking through hole is provided on the box body 3, and the linkage limiting column 252 can movably pass through the unlocking through hole.

[0073] From the above description, it can be seen that when the display screen needs front maintenance, the operator can use the external magnetic tool 5 to drive the magnetic component 22 to move, so that the locking part 241 of the locking plate 24 is disengaged from the locking slot 11 of the locking rod 1, thereby achieving the unlocking function for front maintenance; when the display screen needs rear maintenance, the operator can manually control the movement of the slider 25 through the linkage limit column 252, so that the locking part 241 of the locking plate 24 is disengaged from the locking slot 11 of the locking rod 1, thereby achieving the unlocking function for rear maintenance.

[0074] Embodiment 1

[0075] Please refer to Figures 1 to 13 , Embodiment 1 of the present utility model is: to provide a display screen, on which a display screen maintenance lock is provided.

[0076] like Figure 1 As shown, in the first embodiment, the display screen includes a housing 3 and a display module 4 , and the display screen maintenance lock includes a lock rod 1 arranged on the housing 3 and a lock 2 arranged on the display module 4 .

[0077] For easier understanding, please refer to Figure 2 As shown in Figure 1 In the enlarged view of part A, in the first embodiment, the lock 2 includes a housing 21, a cover plate 27, locking pieces 24 arranged in pairs, a slider 25, a magnetic member 22, a first elastic member 23 and a second elastic member 26.

[0078] The housing 21 is provided with an active groove 211 and a slide groove 212. The active groove 211 is a cylindrical groove. The first elastic member 23 is provided in the active groove 211. The magnetic member 22 is movably provided in the active groove 211. The magnetic member 22 is connected to the first elastic member 23. The magnetic member 22 can linearly reciprocate in the active groove 211 along the vertical direction. Specifically, the magnetic member 22 linearly reciprocates between the highest point first position and the lowest point second position distributed in the vertical direction in the active groove 211. The slide groove 212 is a strip-shaped slide groove 212. The second elastic member 26 is provided in the slide groove 212. The slider 25 is slidably provided in the slide groove 212. The slider 25 is connected to the second elastic member 26. The slide groove 212 can linearly reciprocate in the horizontal direction in the slide groove 212. Specifically, the slider 25 linearly reciprocates between the third position and the fourth position distributed in the horizontal direction in the slide groove 212. The magnetic member 22 is provided with a first wedge-shaped surface 221 , and the slider 25 is provided with a second wedge-shaped surface 251 abutting against the first wedge-shaped surface 221 , so that the magnetic member 22 and the slider 25 are linked together.

[0079] In the first embodiment, the elastic force of the first elastic member 23 is greater than the elastic force of the second elastic member 26. Therefore, in the absence of external force, the first elastic member 23 is in an extended state so that the magnetic member 22 is located in the first position, and the magnetic member 22 contacts the slider 25 so that the slider 25 is located in the third position. The slider 25 compresses the second elastic member 26 in the third position, and the second elastic member 26 is in a compressed state.

[0080] A locking portion 241 is provided at one end of the locking piece 24. The locking portions 241 of the locking pieces 24 arranged in pairs are arranged opposite to each other to enclose a lock opening 244. A linkage portion 242 and a rotation center portion 243 are also provided on the locking piece 24. The linkage portion 242 is connected to the slider 25, and the rotation center portion 243 is rotatably connected to the housing 21. In addition, the linkage portions 242 of the locking pieces 24 arranged in pairs are overlapped to ensure that the travel of the linkage portions 242 of the locking pieces 24 arranged in pairs is consistent, thereby improving the reliability and smoothness of the opening and closing of the lock opening 244.

[0081] Specifically, Figure 3 to Figure 4 As shown, the locking piece 24 is an L-shaped locking piece 24 , a locking portion 241 is provided at one end of the L-shaped locking piece 24 , a rotation center portion 243 is provided at the other end of the L-shaped locking piece 24 , and a linkage portion 242 is provided at the corner of the L-shaped locking piece 24 .

[0082] Among them, the magnetic attraction member 22 has the elastic force of the first elastic member 23 to assist the magnetic attraction member 22 to move, and the magnetic attraction member 22 can also move under the magnetic attraction action of the external magnetic attraction tool 5. The movement direction of the slider 25 is assisted by the elastic force of the second elastic member 26. When the magnetic attraction member 22 moves in the vertical direction, the magnetic attraction member 22 drives the slider 25 to move in the horizontal direction through the wedge-shaped contact surface between it and the top block, so that the slider 25 drives the linkage part of the locking piece 24 to move linearly. The locking piece 24 cannot produce linear displacement under the limiting action of its rotation center part 243, but rotates with its rotation center part 243 as the rotation center, so that the locking part 241 provided at one end thereof and the locking mouth 244 formed by the locking parts 241 of the locking pieces 24 arranged in pairs will be closed or opened.

[0083] like Figure 3 and Fig.11 As shown, in the first embodiment, the linkage portion 242 is a linkage limit hole on the locking piece 24, and the slider 25 is provided with a linkage limit column 252, and the linkage limit column 252 passes through the linkage limit hole. The rotation center portion 243 is a rotation center limit hole opened on the locking piece 24, and the housing 21 is provided with a rotation center limit column 213, and the rotation center limit column 213 can rotatably pass through the rotation center limit hole, and there is a gap between the outer contour of the rotation center limit column 213 and the inner contour of the rotation center limit hole.

[0084] The cover plate 27 is covered on the housing 21, and a through hole 271 and a guide hole 272 are respectively provided on the cover plate 27. Specifically, the through hole 271 is provided on the cover plate 27 corresponding to the position of the lock port 244, and the lock rod 1 can be detachably passed through the through hole 271 so that the lock rod 1 is exactly located in the lock port 244. When the box body 3 and the reality module are assembled, the lock rod 1 and the lock port 244 are aligned; the linkage limit column 252 passes through the guide hole 272, and the linkage limit column 252 can slide along the length direction of the guide hole 272. The guide hole 272 of the cover plate 27 can guide and limit the sliding direction of the slider 25, so as to ensure that the slider 25 drives the linkage part 242 of the lock plate 24 to move linearly back and forth. The cover plate 27 is also provided with a positioning hole 273 corresponding to the rotation center limit column 213, so as to facilitate the positioning of the cover plate 27 on the housing 21.

[0085] The bottom of the locking rod 1 is provided with a first chamfered portion 12 , the locking portion 241 is provided with a second chamfered portion 2411 matching the first chamfered portion 12 , and the locking rod 1 is also provided with a locking groove 11 , and the locking portion 241 of the locking sheet 24 is engaged with the locking opening 244 groove.

[0086] Figure 6 The cross-sectional view of the lock bar 1 and the lock 2 in the disengaged state before the lock 2 on the display module 4 and the lock bar 1 on the box 3 are aligned and installed is shown. It is not difficult to see that the first elastic member 23 is in an extended state, and the elastic force of the first elastic member 23 pushes the magnetic member 22 up to the highest point first position (the magnetic member 22 is subjected to the elastic force of the first elastic member 23 as shown in FIG. Figure 6 As shown by the upward "arrow" in the figure), since the first wedge surface 221 of the magnetic member 22 abuts against the second wedge surface 251 of the slider 25, the slider 25 is pushed to the third position by the magnetic member 22 (the abutting force of the magnetic member 22 on the slider 25 is as shown in FIG. Figure 6 As shown by the leftward “arrow” in the figure), at this time, the lock port 244 of the lock 2 is in a locked state.

[0087] Please combine Figure 7 and Figure 8 For reference, Figure 7 As shown in the figure, the lock 2 on the display module 4 and the lock rod 1 on the box body 3 begin to be installed in alignment. At this time, the lock rod 1 passes through the through hole 271 to be installed in alignment with the lock port 244. In the process of the lock rod 1 gradually entering the lock port 244, the first chamfered portion 12 of the lock rod 1 conflicts with the second chamfered portion 2411 of the lock plate 24, so that the lock port 244 is gradually pushed open by the first chamfered portion 12 of the lock rod 1. At this time, the lock plate 24 rotates with the rotation center portion 243 as the rotation center, so that the lock port 244 rotates from the locked state to the open state (as shown in the figure). Figure 3As shown in the comparison diagram of FIG. 1 , the locking piece 24 will produce linear movement when the limiting part rotates, driving the slider 25 to move linearly from the third position to the fourth position in the horizontal direction (the locking piece 24 is subjected to the resistance of the locking rod 1 and the force exerted on the slider 25 is as shown in FIG. 1 ). Figure 8 As shown by the rightward "arrow" in the figure, under the action of the wedge-shaped surface between the slider 25 and the magnetic member 22, the magnetic member 22 moves linearly from the first position to the second position in the vertical direction, and the first elastic member 23 is compressed (the abutment force of the slider 25 on the magnetic member 22 is as shown in FIG. Figure 8 ) as indicated by the downward “arrow” in the figure.

[0088] Please refer to Fig. 9 When the lock rod 1 continues to move to the position where the lock groove 11 and the locking portion 241 of the lock plate 24 are directly opposite, the force generated by the first chamfered portion 12 of the lock rod 1 and the second chamfered portion 2411 of the lock plate 24 disappears. At this time, the first elastic member 23 elastically recovers to drive the magnetic member 22 to move from the second position to the first position in the vertical direction (the abutment force of the magnetic member 22 on the slider 25 is as shown in FIG. Fig. 9 As shown by the upward "arrow" in the figure), under the action of the wedge surface between the magnetic member 22 and the slider 25, the slider 25 moves linearly from the fourth position to the third position in the horizontal direction and the second elastic member 26 is compressed (the slider 25 is subjected to the abutment force of the magnetic member 22 as shown in FIG. Fig. 9 ), the linkage part 242 of the locking piece 24 moves linearly under the drive of the slider 25, the locking piece 24 rotates around the rotation center part 243, and the lock opening 244 rotates from the open state to the locked state. At this time, the lock opening 244 formed by the locking pieces 24 arranged in pairs is clamped in the lock groove 11 of the lock rod 1, limiting the relative movement between the display module 4 and the box body 3, thereby achieving the purpose of locking the display module 4.

[0089] The display screen provided in the first embodiment can realize the front maintenance function of the display screen by using the magnetic suction tool 5, such as Fig.10 As shown, the magnetic tool 5 is brought close to the magnetic component 22, and the magnetic tool 5 can magnetically absorb the magnetic component 22, so that the magnetic component 22 moves from the first position to the second position and compresses the first elastic component 23. At this time, the resistance force of the magnetic component 22 on the slider 25 disappears, and the second elastic component 26 restores its elastic deformation to drive the slider 25 to move from the third position to the fourth position. The slider 25 drives the linkage part 242 of the locking plate 24 to move linearly, so that the locking plate 24 rotates with the rotation center part 243 as the rotation center, and the lock mouth 244 rotates from the locked state to the open state, so that the lock groove 11 of the locking rod 1 is disengaged from the locking part 241 of the locking plate 24, and the display module 4 can be removed from the box body 3.

[0090] Please refer to Figure 3 and Figure 4In the first embodiment, when the slider 25 is located at the third position, the linkage portion 242 of the locking piece 24 is located at Figure 4 When the slider 25 is at the third position, the linkage portion 242 of the slider 25 is at Figure 4 During the process of opening the lock port 244 of the lock 2, the linkage portion 242 of the lock plate 24 moves from the position of point a to the position of point b under the drive of the slider 25. Figure 4 When the rightward "arrow" in the figure moves horizontally to the position of point b, the linkage part 242 of the locking plate 24 moves horizontally by a distance value X. Among them, the rotation radius R of the locking plate 24 remains unchanged, and at the same time, the position of the linkage part 242 at the position of point a and the position of point b is to be kept on the same straight line, then the rotation center limit hole of the locking plate 24 will be offset by P. To ensure that the locking plate 24 can rotate according to the design requirements, and the rotation process of the locking plate 24 is smooth, a certain gap should be left between the inner contour of the rotation center limit hole of the locking plate 24 and the outer contour of the rotation center limit column 213. Therefore, the diameter of the rotation center limit column 213 is D0, and the diameter of the rotation center limit hole of the locking plate 24 is D1. To meet the above requirements, its design size is: (D1-D0) / 2>P. Meanwhile, in the locking piece 24 designed in the first embodiment, when the linkage portion 242 of the locking piece 24 moves horizontally by a distance value X, the horizontal movement distance value X of the linkage portion 242 is much greater than the rotation center offset distance value P, and the offset distance value L of the locking portion 241 is much greater than the horizontal movement distance value X of the linkage portion 242. Therefore, when the linkage portion 242 of the locking piece 24 slightly changes the horizontal movement distance value X, the offset distance value L of the locking portion 241 changes greatly, which can meet the functions of the locking piece 24 structure to lock and release, and the change in the horizontal movement distance value X of the linkage portion 242 has little effect on the offset distance value P during rotation, which does not affect the rotation of the locking piece 24.

[0091] In the first embodiment, the housing 21 is provided with a first mounting groove 214 and a second mounting groove 215 which are arranged in a stepped shape from top to bottom. The slide groove 212 is arranged adjacent to the movable groove 211 at the groove bottom of the second mounting groove 215, and the slide groove 212 is communicated with the movable groove 211. The slide groove 212 includes a slider receiving groove 2121 and a second elastic member receiving groove 2122 which are arranged in a stepped shape from top to bottom. One end of the slider 25 away from its second wedge-shaped surface 251 is bent downward to form an elastic member connecting portion 253. The elastic member connecting portion 253 is slidably arranged in the second elastic member receiving groove 2122. An elastic member limiting column 254 is also provided on the elastic member connecting portion 253 so that the second elastic member 26 One end of the second elastic member 26 is sleeved on the elastic member connecting column, and the other end of the second elastic member 26 is in conflict with the groove wall of the second elastic member accommodating groove 2122 on the side away from the movable groove 211, and the groove wall of the second elastic member accommodating groove 2122 close to the movable groove 211 forms a limiting wall 216. When the slider 25 moves to the fourth position, the elastic member connecting portion 253 is in conflict with the limiting wall 216 to play a limiting role; the movable groove 211 includes a magnetic suction member accommodating groove 2111 and a first elastic member accommodating groove 2112 which are arranged in a stepped shape from top to bottom, one end of the first elastic member 23 is arranged in the first elastic member accommodating groove 2112, and the other end of the first elastic member 23 is located in the magnetic suction member accommodating groove 2111.

[0092] In this embodiment one, the length of the linkage limit column 252 of the slider 25 can be extended so that the linkage limit column 252 extends from the back of the display screen, so that the front of the display screen can be unlocked using the magnetic suction tool 5, and the back of the display screen can be manually unlocked through the linkage limit column 252.

[0093] In summary, the display screen maintenance lock designed by the utility model has a slider 25 that drives the lock piece 24 to rotate and open and close to realize the locking, loosening and fixing functions. It is applied to the display screen, and the magnetic attraction of the magnetic suction part 22 on the front of the display screen is used as the power to drive the magnetic suction part 22 to move, and the wedge surface is used to convert the movement direction between the slider 25 and the top block. Therefore, the display screen maintenance lock can realize front maintenance on the front of the display screen, and it is not necessary to set a maintenance hole on the PCBA surface of the display screen. At the same time, in the extended design, a manual unlocking switch can be designed on the back of the display screen to realize the rear maintenance function of the display module 4. Therefore, the utility model can be applied to a variety of display screen application scenarios, especially suitable for small-pitch display screens. The display screen maintenance lock can make the maintenance operation of the display screen more convenient and quick, and improve the safety and reliability of the display screen.

[0094] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A display screen maintenance lock, characterized in that: The invention relates to a lock device, wherein the lock device comprises a shell, a magnetic member, a first elastic member and a locking plate. The shell is provided with a movable groove, the first elastic member is arranged in the movable groove, the magnetic member is movably arranged in the movable groove, the magnetic member is connected to the first elastic member, the locking rod is detachably arranged on the shell, the locking rod is provided with a locking groove, the locking plate is provided with a locking part, a linkage part and a rotation center part, the linkage part is transmission-connected with the magnetic member, and the rotation center part is rotatably connected with the shell; wherein, when the magnetic member moves, it drives the linkage part to move, and the locking plate rotates with the rotation center part as the rotation center, so that the locking part is engaged with or disengaged from the locking groove.

2. The display screen maintenance lock according to claim 1, characterized in that: The lock comprises locking plates arranged in pairs, one end of each locking plate is provided with the locking portion, the locking portions of the locking plates arranged in pairs are arranged opposite to each other to enclose a locking opening, and the locking rod is detachably arranged in the locking opening; wherein, when the magnetic attraction member moves, it drives the linkage portion to move, and the locking plate rotates with the rotation center portion as the rotation center and causes the locking opening to close or open.

3. The display screen maintenance lock according to claim 2, characterized in that: The linkage parts of the locking plates arranged in pairs are arranged to overlap.

4. The display screen maintenance lock according to claim 1 or 2, characterized in that: The locking plate is an L-shaped locking plate, one end of the L-shaped locking plate is provided with the locking portion, the other end of the L-shaped locking plate is provided with the rotation center portion, and the linkage portion is provided at the corner of the L-shaped locking plate.

5. The display screen maintenance lock according to claim 1, characterized in that: The rotation center portion is a rotation center limiting hole opened on the locking plate, and a rotation center limiting column is provided on the shell. The rotation center limiting column can rotatably pass through the rotation center limiting hole, wherein there is a gap between the outer contour of the rotation center limiting column and the inner contour of the rotation center limiting hole.

6. The display screen maintenance lock according to claim 1, characterized in that: The lock also includes a slider and a second elastic member. A slide groove is also provided on the shell. The second elastic member is arranged in the slide groove. The slider is slidably arranged in the slide groove. The slider is connected to the second elastic member. The magnetic member is linked to the second elastic member. The linkage part is connected to the slider so that the slider drives the linkage part to move.

7. The display screen maintenance lock according to claim 6, characterized in that: The magnetic attraction member is provided with a first wedge-shaped surface, and the sliding block is provided with a second wedge-shaped surface abutting against the first wedge-shaped surface.

8. The display screen maintenance lock according to claim 6, characterized in that: The lock also includes a cover plate, which is covered on the shell, and a through hole and a guide hole are respectively opened on the cover plate. The locking rod can be detachably passed through the through hole. The linkage part is a linkage limit hole opened on the locking plate. A linkage limit column is provided on the slider, and the linkage limit column passes through the linkage limit hole and the guide hole in sequence, and the linkage limit column can slide along the length direction of the guide hole.

9. The display screen maintenance lock according to claim 1, characterized in that: The locking rod is provided with a first chamfered portion, and the locking portion is provided with a second chamfered portion that matches the first chamfered portion.

10. A display screen, characterized in that: The invention comprises a display screen maintenance lock as described in any one of claims 1 to 9, wherein the display screen maintenance lock comprises a locking rod and a lock, and further comprises a box body and a display module, wherein the locking rod is arranged on the box body, and the lock device is arranged on the display module, so that the box body and the display module are connected and fixed by the display screen maintenance lock.

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