Light-emitting diode (LED) screen unit box lock

Abstract

The utility model discloses a light-emitting diode (LED) screen unit box lock which comprises a mortise lock and a gate lock, the gate lock comprises a gate lock seat, a swing lock block and a torsion spring, the gate lock seat is provided with a gate lock inlet leading to the inside of the gate lock seat, and the wall body of the gate lock seat is provided with a swing avoiding hole. The swing lock block is perpendicular to the lock rod, the clamping end of the swing lock block penetrates through the swing receding hole and then extends into the end, close to the gate lock inlet, of the interior of the gate lock seat, the shifting end of the swing lock block extends out of the gate lock seat, the middle of the swing lock block is rotationally connected with the gate lock seat through a first rotating shaft, and the first rotating shaft is sleeved with the torsion spring. The two ends of the torsion spring abut against the middle of the swing lock block and the inner wall of the brake lock seat respectively, and the clamping end of the swing lock block is provided with a lock rod clamping hole and an unlocking side hole located in the side edge of the lock rod clamping hole and communicated with the lock rod clamping hole. According to the utility model, whether the lock rod is clamped or not is realized by adopting a swinging mode of the swinging lock block, so that locking and unlocking are realized, the swinging type locking and unlocking design can prevent the problem of mistaken touch, the safety is improved, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display screen cabinet locks, and more specifically, to an LED screen unit cabinet lock. Background Art

[0002] With the continuous development and progress of science and technology, LED display screens are widely used in various large and small media, advertising, stage, exhibition and other public or commercial places. Such LED display screens are usually assembled from multiple LED unit boxes. Traditional LED display box usually uses screws, connecting pieces, hook locks, etc. to assemble the LED unit box. Not only does it require the use of more auxiliary tools during assembly, but it is also difficult to assemble, time-consuming and labor-intensive, and difficult to disassemble. Although there are some assembly box locks on the market, which insert the locking rod into the gate lock, and achieve the card connection and locking through the card block in the gate lock and the card slot of the locking rod, the card block of this type of assembly box lock is pressed to move linearly to achieve the switch lock. The linear movable switch lock has the problem of easy accidental touch, so that the box is not locked, which poses a safety hazard. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and provide a LED screen unit box lock.

[0004] To achieve the above-mentioned purpose, the utility model provides a LED screen unit box lock, including a latch lock and a gate lock, wherein the latch lock and the gate lock can cooperate to lock;

[0005] The mortise lock comprises a mortise lock seat, a lock rod, a lock sleeve and a handle, the mortise lock seat is provided with a mortise lock through hole, the lock rod passes through the mortise lock through hole, the clamping end surface of the lock rod is provided with a locking groove, the lock sleeve connecting end surface of the lock rod is provided with an external thread, the inner wall of the lock sleeve is provided with an internal thread, the lock sleeve is rotatably inserted into the mortise lock through hole and sleeved outside the lock rod through the internal thread and the external thread of the lock rod, the handle connecting end of the lock sleeve extends from the entrance of the mortise lock through hole and is fixedly connected to the handle, when the handle is rotated in the tightening direction, the handle can drive the lock sleeve to rotate, and when the handle is rotated to the tightening position, it can contact with the surface of the mortise lock seat and lock the surface of the mortise lock seat;

[0006] The gate lock includes a gate lock seat, a swing lock block and a torsion spring. The front side of the gate lock seat is provided with a gate lock entrance for the locking rod to pass through and be inserted into the gate lock seat. The wall of the gate lock seat is provided with a swing avoidance hole. The swing lock block is arranged perpendicular to the locking rod and its clamping end passes through the swing avoidance hole and extends into the gate lock seat near the gate lock entrance. The toggle end of the swing lock block extends to the outside of the gate lock seat. The middle part of the swing lock block is rotatably connected to the gate lock seat through a first rotating shaft parallel to the locking rod. The torsion spring is sleeved outside the first rotating shaft, one end of the torsion spring abuts against the middle part of the swing lock block, and the other end of the torsion spring abuts against the inner wall of the gate lock seat. The clamping end of the swing lock block is provided with a locking rod clamping hole and an unlocking side hole located on the side of the locking rod clamping hole and connected to the locking rod clamping hole, and the unlocking side hole is larger than the locking rod clamping hole.

[0007] Preferably, the gate lock also includes a first spring and a normally open block, the normally open block being located at an end of the gate lock seat away from the gate lock entrance, the normally open block being able to move in a direction parallel to the locking rod, the first spring being located between the end of the normally open block away from the gate lock entrance and the gate lock seat and being arranged parallel to the locking rod, when the first spring is in a normal state, the end of the normally open block close to the gate lock entrance can be inserted into the unlocking side hole of the swing lock block to clamp the swing lock block, so that the swing lock block cannot swing in the direction of closing the gate lock, so that the gate lock remains in a normally open state, and the torsion spring is in a forced state at this time.

[0008] Preferably, the mortise lock further comprises a lock sleeve rotation positioning device for preventing the lock sleeve from retreating and loosening when locked, and the lock sleeve rotation positioning device is arranged between the handle and the entrance of the mortise lock through hole of the mortise lock seat.

[0009] Preferably, the lock sleeve rotation positioning device includes a clamping block and a second spring, the latch seat is provided with a plurality of fixed teeth distributed in a semi-circular shape on the outer surface of the entrance of the latch through hole, the handle is provided with a block avoidance hole, the clamping end of the clamping block extends into the handle after passing through the block avoidance hole and is located on the side of the fixed teeth, the middle part of the clamping block is rotatably connected to the handle through a second rotating shaft parallel to the lock rod, the toggle end of the clamping block extends to the outside of the handle, the second spring is installed in the handle and abuts between the wall of the handle and the clamping end of the clamping block, and the second spring is arranged perpendicular to the clamping end of the clamping block;

[0010] When the lock sleeve is rotated in the tightening direction by the handle, the engaging end of the clamping block can move on the fixed clamping teeth and pass through them in sequence, and finally be engaged between the corresponding two fixed clamping teeth, so that the handle cannot be rotated in the loosening direction to fix the lock sleeve;

[0011] When the handle is rotated in the loosening direction, the clamping end of the clamping block is engaged with the fixed clamping tooth, so that the handle cannot be rotated in the loosening direction. At this time, the clamping block needs to be moved so that the clamping end of the clamping block leaves the fixed clamping tooth, and the handle can be rotated in the loosening direction.

[0012] Preferably, a relief slope is provided on the surface of the clamping end of the clamping block facing away from the fixed clamping tooth.

[0013] Preferably, the mortise lock further comprises a lock sleeve limiting device for limiting the loosening of the lock sleeve, and the lock sleeve limiting device is installed on the mortise lock seat.

[0014] The lock sleeve limiting device of claim 1, wherein the lock sleeve has an end edge protruding from the edge of the lock sleeve away from the handle, the lock sleeve having a clamping flange, the lock sleeve having a movably mounted on the latch seat and arranged perpendicular to the lock rod, the lock sleeve having a movably mounted on the latch seat and arranged perpendicular to the lock rod, the lock sleeve having a movably mounted on the latch seat and arranged perpendicular to the lock rod, the lock sleeve having a movably mounted on the latch seat and a lock rod ...

[0015] Preferably, the mortise lock seat comprises a mortise lock housing and a mortise lock end plate, the mortise lock end plate is mounted at one end of the mortise lock housing, and the mortise lock through hole is provided at the lower end of the mortise lock housing.

[0016] Preferably, the gate lock seat includes a gate lock shell and a gate lock end plate, the gate lock end plate is installed on one end of the gate lock shell, the gate lock entrance is opened on the gate lock end plate, the interior of the gate lock seat is formed between the gate lock shell and the gate lock end plate, and the swing avoidance hole is opened on the wall of the gate lock shell.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model has a simple and novel structure and a reasonable design. It adopts a swing lock block to swing the lock rod to realize whether the lock rod is engaged or not, thereby realizing the switch lock. The swing switch lock design can prevent the problem of accidental touch, improve safety, and has high safety.

[0019] 2. The utility model is provided with a lock sleeve rotation positioning device and a lock sleeve limiting device. After the handle is locked, the lock sleeve can be fixed and cannot be loosened, so that the connection between the two adjacent boxes is tightened, preventing the lock sleeve from separating from the lock rod, ensuring that the connection and installation of the boxes are stable, and improving safety.

[0020] 3. The utility model is provided with a first spring and a normally open abutment block. When the locking rod is not inserted into the gate lock, one end of the normally open abutment block can be inserted into the unlocking side hole of the swing lock block, so that the swing lock block cannot be swung in the direction of closing the gate lock. At this time, the gate lock always remains in the open state. This design does not require the user to move the swing lock block in advance to insert the locking rod into the gate lock, which simplifies the operation process and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure provided by the embodiment of the utility model (the gate lock and the latch are not locked);

[0023] Figure 2 This is a schematic diagram of the structure provided by the embodiment of the utility model Figure 1 (gate lock and mortise lock are locked);

[0024] Figure 3 This is a schematic diagram of the structure provided by the embodiment of the utility model Figure 2 (gate lock and mortise lock are locked);

[0025] Figure 4 It is a half-section diagram provided by an embodiment of the utility model (the gate lock and the latch lock are locked);

[0026] Figure 5 It is a schematic diagram of the cooperation between the latch lock and the swing lock block provided in the embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the structure of some parts of the mortise lock provided by the embodiment of the utility model. Figure 1 ;

[0028] Figure 7 This is a schematic diagram of the structure of some parts of the mortise lock provided by the embodiment of the utility model. Figure 2 ;

[0029] Figure 8 This is a schematic diagram of the structure of some parts of the mortise lock provided by the embodiment of the utility model. Figure 3;

[0030] Fig. 9 This is a schematic diagram of the structure of some parts of the mortise lock provided by the embodiment of the utility model. Figure 4 ;

[0031] Fig.10 This is a schematic diagram of the structure of some parts of the mortise lock provided by the embodiment of the utility model. Figure 5 ;

[0032] Fig.11 This is a schematic diagram of the structure of some parts of the mortise lock provided by the embodiment of the utility model. Figure 6 ;

[0033] Fig.12 It is a structural schematic diagram of a lock rod provided in an embodiment of the utility model;

[0034] Fig.13 It is a structural schematic diagram of a straight-moving card block provided in an embodiment of the utility model;

[0035] Fig.14 It is a disassembly schematic diagram of the gate lock provided by the embodiment of the utility model;

[0036] Fig.15 It is an exploded schematic diagram of a gate lock housing and a swing lock block provided by an embodiment of the utility model;

[0037] Fig.16 It is an exploded schematic diagram of the gate lock housing, the first spring and the normally open stop block provided by an embodiment of the utility model;

[0038] Fig.17 It is a structural schematic diagram of a swing lock block provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Please refer to Figures 1 to 17 The embodiment of the utility model provides a LED screen unit box lock, including a latch lock 1 and a gate lock 2. The latch lock 1 and the gate lock 2 can cooperate to lock. The structure of each component and its working principle will be described below.

[0041] The mortise lock 1 comprises a mortise lock seat 11, a locking rod 12, a lock sleeve 13, a handle 14, a lock sleeve rotation positioning device 15 for preventing the lock sleeve 13 from retreating and loosening when locked, and a lock sleeve limiting device 16 for limiting the lock sleeve 13 from loosening.

[0042] Preferably, the latch seat 11 may include a latch housing 113 and a latch end plate 114 . The latch end plate 114 is mounted at one end of the latch housing 113 . A latch through hole 111 is provided at the lower end of the latch housing 113 .

[0043] The locking rod 12 passes through the latch through hole 111, and a locking groove 121 is provided on the clamping end surface of the locking rod 12. An external thread 122 is provided on the lock sleeve connecting end surface of the locking rod 12. An internal thread 131 is provided on the inner wall of the lock sleeve 13. The lock sleeve 13 is rotatably inserted into the latch through hole 111 and is threadably matched with the external thread 122 of the locking rod 12 through the internal thread 131 and is sleeved on the outside of the locking rod 12. The handle connecting end of the lock sleeve 13 extends from the entrance of the latch through hole 111 and is fixedly connected to the handle 14. The handle is perpendicular to the locking rod 12. The lock sleeve rotation positioning device 15 is arranged between the handle 14 and the entrance of the latch through hole 111 of the latch housing 113, and the lock sleeve limiting device 16 is installed on the latch seat 11.

[0044] Preferably, in the present embodiment, the lock sleeve rotation positioning device 15 may include a clamping block 151 and a second spring 152, a plurality of fixed teeth 112 are semi-circularly distributed on the outer surface of the entrance of the latch through hole 111 on the latch housing 113, a block avoidance hole 141 is opened on the handle 14, the clamping block 151 is perpendicular to the lock rod, the clamping end of the clamping block 151 extends into the handle 14 after passing through the block avoidance hole 141 and is located on the side of the fixed teeth 112, the middle part of the clamping block 151 is rotatably connected to the handle 14 through a second rotating shaft 153 parallel to the lock rod 12, the toggle end of the clamping block 151 extends to the outside of the handle 14, the second spring 152 is installed in the handle 14 and abuts between the wall of the handle 14 and the clamping end of the clamping block 151, and the second spring 152 is arranged perpendicular to the clamping end of the clamping block 151.

[0045] In order to enable the clamping block to avoid the fixed teeth better when it is away from the fixed teeth, a avoiding inclined surface 1511 is provided on the surface of the clamping end of the clamping block 151 facing away from the fixed teeth 112 .

[0046] In specific implementation, the lock sleeve limiting device 16 includes a straight-moving card block 161 and a third spring 162. The edge of one end of the lock sleeve 13 away from the handle 14 is convexly provided with a clamping flange 132. The straight-moving card block 161 is movably installed on the latch seat 11 and is arranged perpendicular to the lock rod 12. The straight-moving card block 161 can move in a direction perpendicular to the lock rod 12. The clamping end of the straight-moving card block 161 is provided with a card block through hole 1611 for the lock rod 12 and the lock sleeve 13 to pass through, and a lock sleeve card slot 1612 located at one end of the card block through hole 1611 and connected to the card block through hole 1611. The width of the lock sleeve card slot 1612 at the maximum width The degree is smaller than the width of the block through hole 1611, the pressing end of the straight-moving block 161 extends out of the latch seat 11, the clamping flange 132 is located on the side of the straight-moving block 161 close to the gate lock 2, and the first spring stop blocks 1613 are provided on both sides of the straight-moving block 161. The third spring 162 is located inside the latch seat 11 and arranged on both sides of the straight-moving block 161. The third spring 162 is arranged parallel to the translation direction of the straight-moving block 161, one end of the third spring 162 abuts against the first spring stop block 1613, and the other end of the third spring 162 abuts against the second spring stop block 119 provided inside the latch seat 11.

[0047] Specifically, the card block through hole in this embodiment is set to be a rectangle, and the groove wall of the lock sleeve groove is set to be an arc surface, so that the width of the lock sleeve groove 1612 at the maximum width (i.e., the entrance) is smaller than the width of the card block through hole 1611, the width of the card block through hole is larger than the outer diameter of the clamping flange, and the width of the lock sleeve groove 1612 at the maximum width is smaller than the outer diameter of the clamping flange. Through the above design, when the third spring is in a normal state, the center of the card block through hole is staggered with the center of the lock sleeve, and a part of the wall of the lock sleeve is inserted into the lock sleeve groove. When the handle is loosened to the full extent, the engaging flange is engaged with the straight-moving block, and the user can no longer loosen the handle, thereby achieving the purpose of limiting the handle loosening position and reminding the user that the handle has been loosened to the full extent. When the locking rod, the lock sleeve and the handle need to be removed as a whole, the user can press the straight-moving block, and the straight-moving block moves and the position of the block through hole on it moves accordingly, so that the center of the block through hole completely corresponds to the center of the lock sleeve. At this time, the lock sleeve and the engaging flange on the lock sleeve can pass through the block through hole, and the user can directly take out the locking rod, the lock sleeve and the handle as a whole.

[0048] The gate lock 2 includes a gate lock seat 21 , a swing lock block 22 , a torsion spring 23 , a first spring 25 and a normally open stop block 26 .

[0049] Specifically, the gate lock seat 21 may include a gate lock shell 213 and a gate lock end plate 214. The gate lock end plate 214 is installed at one end of the gate lock shell 213. A gate lock entrance 211 is provided on the gate lock end plate 214 for the lock rod 12 to pass through and be inserted into the gate lock seat 21. The interior of the gate lock seat 21 is formed between the gate lock shell 213 and the gate lock end plate 214. The gate lock entrance 211 leads to the interior of the gate lock seat 21. A swing avoidance hole 212 is provided on the wall of the gate lock shell 213.

[0050] The swing lock block 22 is arranged perpendicular to the lock rod 12 and its clamping end passes through the swing avoidance hole 212 and extends into the end of the gate lock seat 21 near the gate lock entrance 211. The toggle end of the swing lock block 22 extends to the outside of the gate lock seat 21. The middle part of the swing lock block 22 is rotatably connected to the gate lock seat 21 through a first rotating shaft 24 parallel to the lock rod 12. The torsion spring 23 is sleeved outside the first rotating shaft 24. One end of the torsion spring 23 abuts against the middle part of the swing lock block 22, and the other end of the torsion spring 23 abuts against the inner wall of the gate lock seat 21. The clamping end of the swing lock block 22 is provided with a lock rod clamping hole 221 and an unlocking side hole 222 located on the side of the lock rod clamping hole 221 and connected to the lock rod clamping hole 221. The diameter of the unlocking side hole 222 is larger than the diameter of the lock rod clamping hole 221. Among them, the diameter of the locking rod clamping hole is equal to the diameter of the rod body part corresponding to the locking slot position on the locking rod, so that the clamping end of the locking rod can be clamped into the locking rod clamping hole. Correspondingly, the diameter of the unlocking side hole 222 is larger than the diameter of the clamping end of the locking rod, so that the locking rod can smoothly pass through the unlocking side hole. The normally open block 26 is located at the end of the gate lock seat 21 away from the gate lock entrance 211. The normally open block 26 can move in a direction parallel to the locking rod 12. The first spring 25 is located between the end of the normally open block 26 away from the gate lock entrance 211 and the gate lock seat 21 and is arranged parallel to the locking rod 12. The outer diameter of the end of the normally open block 26 close to the gate lock entrance 211 is equal to the diameter of the unlocking side hole of the swinging lock block 22, so that the end of the normally open block 26 close to the gate lock entrance 211 can be inserted into the unlocking side hole to clamp the swinging lock block.

[0051] The working principle of the utility model is as follows:

[0052] The gate lock is installed on the wall of one LED box, and the mortise lock is installed on the wall of another LED box. When the lock rod of the mortise lock is not inserted into the gate lock, and the first spring 25 is in a normal state, the end of the normally open stopper 26 close to the gate lock entrance 211 is inserted into the unlocking side hole 222 of the swing lock block 22 to clamp the swing lock block 22, so that the swing lock block 22 cannot swing in the direction of closing the gate lock, so that the gate lock 2 remains in a normally open state, and at this time the torsion spring 23 is in a forced state;

[0053] When the locking rod is inserted into the gate lock, the clamping end of the locking rod enters into the gate lock through the gate lock entrance, and the clamping end of the locking rod then presses against the normally open block through the unlocking side hole of the swing lock block. The locking rod continues to be inserted, so that one end of the normally open block exits the unlocking side hole. At this time, since the clamping end of the locking rod cannot clamp the swing lock block, the torsion spring drives the swing lock block to swing in the direction of locking the gate lock, so that the clamping end of the locking rod is inserted into the locking rod clamping hole of the swing lock block. Due to the design of the locking slot, the locking end of the locking rod is stuck with the swing locking block. At this time, the latch and the gate lock are locked. After that, the user can rotate the handle in the tightening direction. Due to the threaded cooperation between the lock sleeve 13 and the locking rod, the handle 14 can move towards the gate lock when it is rotated in the tightening direction. When the handle 14 is rotated to the tightening position, the handle can contact and lock the surface of the latch seat 11, thereby tightening the two boxes and making the connection more stable. In the process of rotating the handle 14 in the tightening direction, the locking block can rotate with the handle. During the rotation, the locking end of the locking block 151 can move on the fixed teeth 112 and pass through in turn, and finally be engaged between the corresponding two fixed teeth 112, thereby realizing the locking positioning between the handle and the latch seat, so that the handle 14 cannot be rotated in the loosening direction to lock the handle and the lock sleeve.

[0054] When unlocking, the user can move the swing lock block to swing, so that the locking rod clamping hole of the swing lock block is staggered with the locking rod, so that the position of the unlocking side hole of the swing lock block corresponds to the locking rod, and then the locking rod can be pulled out. When the locking rod is pulled out, due to the loss of the resistance force of the locking rod, the first spring can drive the normally open block to move in the direction close to the gate lock entrance, so that one end of the normally open block is reinserted into the unlocking side hole of the swing lock block to clamp the swing lock block, so that the gate lock remains in the normally open state. After the latch is separated from the gate lock, the user can rotate the handle in the loosening direction. At this time, since the clamping end of the clamping block 151 is clamped with the fixed clamping tooth 112, the handle 14 cannot be rotated in the loosening direction. At this time, the clamping block 151 needs to be moved so that the clamping end of the clamping block 151 leaves the fixed clamping tooth 112. At this time, the handle 14 can be rotated in the loosening direction to loosen the handle.

[0055] In summary, the utility model has the following advantages:

[0056] 1. The utility model has a simple and novel structure and a reasonable design. It adopts a swing lock block to swing the lock rod to realize whether the lock rod is engaged or not, thereby realizing the switch lock. The swing switch lock design can prevent the problem of accidental touch, improve safety, and has high safety.

[0057] 2. The utility model is provided with a lock sleeve rotation positioning device and a lock sleeve limiting device. After the handle is locked, the lock sleeve can be fixed and cannot be loosened, so that the connection between the two adjacent boxes is tightened, preventing the lock sleeve from separating from the lock rod, ensuring that the connection and installation of the boxes are stable, and improving safety.

[0058] 3. The utility model is provided with a first spring and a normally open abutment block. When the locking rod is not inserted into the gate lock, one end of the normally open abutment block can be inserted into the unlocking side hole of the swing lock block, so that the swing lock block cannot be swung in the direction of closing the gate lock. At this time, the gate lock always remains in the open state. This design does not require the user to move the swing lock block in advance to insert the locking rod into the gate lock, which simplifies the operation process and is more convenient to use.

[0059] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A LED screen unit box lock, characterized by: It comprises a latch lock (1) and a gate lock (2), wherein the latch lock (1) and the gate lock (2) can be locked in coordination; The mortise lock (1) comprises a mortise lock seat (11), a locking rod (12), a lock sleeve (13) and a handle (14); the mortise lock seat (11) is provided with a mortise lock through hole (111); the locking rod (12) passes through the mortise lock through hole (111); the locking end surface of the locking rod (12) is provided with a locking groove (121); the locking sleeve connecting end surface of the locking rod (12) is provided with an external thread (122); the inner wall of the lock sleeve (13) is provided with an internal thread (131); the lock sleeve (13) is rotatably provided on the mortise lock seat (11); The lock through hole (111) is threadably matched with the external thread (122) of the lock rod (12) through the internal thread (131) and is sleeved outside the lock rod (12); the handle connecting end of the lock sleeve (13) extends from the entrance of the latch lock through hole (111) and is fixedly connected to the handle (14); when the handle (14) is rotated in the tightening direction, the handle (14) can drive the lock sleeve (13) to rotate; when the handle (14) is rotated to the tightening position, it can contact the surface of the latch lock seat (11) and lock the surface of the latch lock seat (11); The gate lock (2) comprises a gate lock seat (21), a swing lock block (22) and a torsion spring (23); a gate lock entrance (211) is provided on the front of the gate lock seat (21) for the lock rod (12) to pass through and be inserted into the gate lock seat (21); a swing avoidance hole (212) is provided on the wall of the gate lock seat (21); the swing lock block (22) is arranged perpendicular to the lock rod (12) and its clamping end passes through the swing avoidance hole (212) and then extends into the gate lock seat (21) near the gate lock entrance (211); the toggle end of the swing lock block (22) extends to the outside of the gate lock seat (21); the swing lock block (22) is provided with a spring (23) and a spring (23 ... provided with a spring (23) and a spring (23) is provided on the wall of the gate lock seat (21); the swing lock block (22) is provided with a spring (23) and a spring (23) is provided on the wall of the gate lock seat (21); the swing lock block (22) is provided with a spring (23) and a spring (23) is provided on the wall of the gate lock seat (21); the swing lock block (22) is provided with a spring (23) and a spring (23) is provided on the wall of the gate lock seat (21); the swing lock block (22) is provided The middle part of the lock block (22) is rotatably connected to the gate lock seat (21) through a first rotating shaft (24) parallel to the lock rod (12); the torsion spring (23) is sleeved outside the first rotating shaft (24); one end of the torsion spring (23) abuts against the middle part of the swing lock block (22); the other end of the torsion spring (23) abuts against the inner wall of the gate lock seat (21); the clamping end of the swing lock block (22) is provided with a lock rod clamping hole (221) and an unlocking side hole (222) located on the side of the lock rod clamping hole (221) and connected to the lock rod clamping hole (221); the unlocking side hole (222) is larger than the lock rod clamping hole (221).

2. The LED screen unit box lock according to claim 1, characterized in that: The gate lock (2) also includes a first spring (25) and a normally open stopper (26), wherein the normally open stopper (26) is located at one end of the gate lock seat (21) away from the gate lock entrance (211), and the normally open stopper (26) can move in a direction parallel to the lock rod (12). The first spring (25) is located between the end of the normally open stopper (26) away from the gate lock entrance (211) and the gate lock seat (21) and is arranged parallel to the lock rod (12). When the first spring (25) is in a normal state, the end of the normally open stopper (26) close to the gate lock entrance (211) can be inserted into the unlocking side hole (222) of the swing lock block (22) to clamp the swing lock block (22), so that the swing lock block (22) cannot swing in the direction of closing the gate lock, so that the gate lock (2) remains in a normally open state, and at this time the torsion spring (23) is in a forced state.

3. The LED screen unit box lock according to claim 1, characterized in that: The mortise lock (1) further comprises a lock sleeve rotation positioning device (15) for preventing the lock sleeve (13) from retreating and loosening when locked, and the lock sleeve rotation positioning device (15) is arranged between the handle (14) and the entrance of the mortise lock through hole (111) of the mortise lock seat (11).

4. The LED screen unit box lock according to claim 3, characterized in that: The lock sleeve rotation positioning device (15) comprises a clamping block (151) and a second spring (152); the latch seat (11) is provided with a plurality of fixed latch teeth (112) distributed in a semi-circular shape on the outer surface of the entrance of the latch through hole (111); the handle (14) is provided with a block avoidance hole (141); the clamping end of the clamping block (151) passes through the block avoidance hole (141) and then extends into the interior of the handle (14) and is located at the fixed latch teeth (112). On the side, the middle part of the clamping block (151) is rotatably connected to the handle (14) through a second rotating shaft (153) parallel to the locking rod (12), the moving end of the clamping block (151) extends out of the handle (14), the second spring (152) is installed inside the handle (14) and abuts between the wall of the handle (14) and the clamping end of the clamping block (151), and the second spring (152) is arranged perpendicular to the clamping end of the clamping block (151); When the lock sleeve (13) is rotated in the tightening direction by the handle (14), the clamping end of the clamping block (151) can move on the fixed clamping teeth (112) and pass through them in sequence, and finally clamped between two corresponding fixed clamping teeth (112), so that the handle (14) cannot be rotated in the loosening direction, so as to fix the lock sleeve (13); When the handle (14) is rotated in the loosening direction, the clamping end of the clamping block (151) is clamped with the fixed clamping tooth (112), so that the handle (14) cannot be rotated in the loosening direction. At this time, the clamping block (151) needs to be moved so that the clamping end of the clamping block (151) leaves the fixed clamping tooth (112), and the handle (14) can be rotated in the loosening direction.

5. The LED screen unit box lock according to claim 4, characterized in that: An avoidance slope (1511) is provided on the surface of the clamping end of the clamping block (151) facing away from the fixed clamping tooth (112).

6. The LED screen unit box lock according to claim 1, characterized in that: The mortise lock (1) further comprises a lock sleeve limiting device (16) for limiting the loosening of the lock sleeve (13); the lock sleeve limiting device (16) is mounted on the mortise lock seat (11).

7. The LED screen unit box lock according to claim 6, characterized in that: The lock sleeve limiting device (16) comprises a linearly movable block (161) and a third spring (162); an end edge of the lock sleeve (13) away from the handle (14) is provided with a clamping flange (132); the linearly movable block (161) is movably mounted on the latch seat (11) and arranged perpendicularly to the lock rod (12); the linearly movable block (161) can move in a direction perpendicular to the lock rod (12); a clamping end of the linearly movable block (161) is provided with a block through hole (1611) for the lock rod (12) and the lock sleeve (13) to pass through, and a lock sleeve clamping groove (1612) located at one end of the block through hole (1611) and connected to the block through hole (1611); the maximum width of the lock sleeve clamping groove (1612) is less than The width of the card block through hole (1611) is greater than or equal to the width of the card block through hole (1611), the pressing end of the straight-moving card block (161) extends out of the latch seat (11), the engaging flange (132) is located on the side of the straight-moving card block (161) close to the gate lock (2), first spring stop blocks (1613) are provided on both sides of the straight-moving card block (161), the third spring (162) is located inside the latch seat (11) and arranged on both sides of the straight-moving card block (161), the third spring (162) is arranged parallel to the translation direction of the straight-moving card block (161), one end of the third spring (162) abuts against the first spring stop block (1613), and the other end of the third spring (162) abuts against the second spring stop block (119) provided inside the latch seat (11).

8. The LED screen unit box lock according to claim 1, characterized in that: The latch seat (11) comprises a latch housing (113) and a latch end plate (114), wherein the latch end plate (114) is mounted on one end of the latch housing (113), and the latch through hole (111) is provided at the lower end of the latch housing (113).

9. The LED screen unit box lock according to claim 1, characterized in that: The gate lock seat (21) comprises a gate lock housing (213) and a gate lock end plate (214); the gate lock end plate (214) is mounted on one end of the gate lock housing (213); the gate lock inlet (211) is provided on the gate lock end plate (214); the gate lock housing (213) and the gate lock end plate (214) form an interior of the gate lock seat (21); and the swing avoidance hole (212) is provided on the wall of the gate lock housing (213).

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