locking device

Abstract

This invention relates to a locking device, belonging to the field of LED display device fixing technology. The locking device includes a lock seat, a latch, and a drive mechanism. The lock seat has a mounting groove; the latch is movably mounted on the mounting groove of the lock seat, and can reciprocate along a first direction and a second direction of the lock seat to switch between a locked position and an unlocked position. The drive mechanism is mounted on the lock seat and is drivenly connected to the latch, used to drive the latch to switch between the locked and unlocked positions. When the drive mechanism drives the latch from the unlocked position to the locked position, the latch extends out of the lock seat along the first direction and simultaneously approaches the lock seat along the second direction to press against the component to be locked. When the drive mechanism drives the latch from the locked position to the unlocked position, the latch partially retracts into the lock seat along the first direction and simultaneously moves away from the lock seat along the second direction to release the pressure on the component to be locked, thus balancing the safety of LED cabinet transportation and the need for quick assembly and disassembly.

Description

Technical Field

[0001] This invention relates to the field of LED display device fixing technology, and in particular to a locking device. Background Technology

[0002] With the rapid development of the LED display industry, LED displays are widely used in stage performances, exhibitions, sporting events, and other fields. Among these, rental LED displays require frequent transportation and rapid installation, making transportation efficiency and safety crucial factors affecting their performance. Currently, LED cabinets can be transported using transport vehicles.

[0003] Existing transport vehicles typically use bottom locking plates on the LED boxes for positioning, and the side panels of the transport vehicle provide additional security, ensuring the safety of the LED boxes during transport. However, when used at event sites, the side panels of the transport vehicle are usually removed for quick loading and unloading of the boxes. In this case, each box is only positioned by the bottom locking plates, making it prone to shaking during transport and collisions between adjacent boxes, which can cause damage. Therefore, a quick-locking device is usually added to the transport vehicle to allow for rapid fixing and unlocking of the LED boxes.

[0004] Most existing quick-locking devices use a horizontal extension and retraction of the locking tongue to achieve locking. The height between the locking tongue and the bottom of the transport vehicle is a fixed value and must match the thickness of the bottom edge of the container. Due to the influence of container machining precision and installation errors, when the locking tongue height is too low, it is easy for the locking tongue to fail to extend smoothly, affecting locking, or even failing to lock at all; when the locking tongue height is too high, although locking can be completed, it cannot effectively compress the container, and the container will still wobble. Summary of the Invention

[0005] The purpose of this invention is to provide a locking device that allows the locking tongue to press down on the housing simultaneously during the locking process and to spring back up to reset simultaneously during the unlocking process.

[0006] To address the aforementioned technical problems, this application provides a locking device, comprising: a lock seat with a mounting groove; a latch movably disposed on the mounting groove of the lock seat, the latch being reciprocating along a first direction and a second direction of the lock seat to switch between a locking position and an unlocking position; and a drive mechanism disposed on the lock seat and tractively connected to the latch for driving the latch to switch between the locking position and the unlocking position; wherein, when the drive mechanism drives the latch to move from the unlocking position to the locking position, the latch extends out of the lock seat along the first direction and simultaneously approaches the lock seat along the second direction to press against the member to be locked; when the drive mechanism drives the latch to move from the locking position to the unlocking position, the latch partially retracts to the lock seat along the first direction and simultaneously moves away from the lock seat along the second direction to release the pressing against the member to be locked.

[0007] In some embodiments of this application, the driving mechanism includes a rotary driving member, a first transmission member, and a second transmission member; the rotary driving member is rotatably connected to the lock seat, and the first transmission member and the second transmission member are disposed on the rotary driving member and cooperate with the lock tongue; the first transmission member is used to drive the lock tongue to move along the first direction when the rotary driving member rotates; the second transmission member is used to drive the lock tongue to move along the second direction when the rotary driving member rotates.

[0008] In some embodiments of this application, the driving mechanism further includes an elastic element; the elastic element is disposed between the latch and the lock seat, and the elastic element is compressed when the second transmission member drives the latch to approach the lock seat in the second direction; when the second transmission member releases its contact with the latch, the elastic element drives the latch to move away from the lock seat in the second direction.

[0009] In some embodiments of this application, the rotary drive includes a knob and a screw; the screw is fixedly connected to the knob; the latch has an elongated hole extending in a first direction; one end of the screw away from the knob passes through the elongated hole in a second direction and is rotatably connected to the lock seat.

[0010] In some embodiments of this application, the first transmission member is connected to the side of the knob facing the lock seat; the axis of the first transmission member is parallel to and spaced apart from the axis of the screw; the lock tongue is provided with a limiting groove that cooperates with the first transmission member, and the first transmission member is inserted into the limiting groove; when the knob drives the first transmission member to rotate, the first transmission member abuts against the inner wall of the limiting groove, thereby driving the lock tongue to extend or retract to the lock seat in a first direction.

[0011] In some embodiments of this application, the second transmission member is provided with a screw hole, the screw passes through the screw hole, and the screw is threadedly connected to the second transmission member; when the knob drives the screw to rotate, the second transmission member moves along the axis of the screw so as to abut against the locking tongue and move closer to the lock seat along its second direction.

[0012] In some embodiments of this application, one end of the second transmission member is provided with a limiting part; the locking tongue is provided with a groove that cooperates with the limiting part, the groove extending along a first direction; the limiting part is accommodated in the groove and restricts the second transmission member from rotating with the screw.

[0013] In some embodiments of this application, the drive mechanism further includes a flange ring disposed between the locking tongue and the elastic element; the bottom wall of the mounting groove of the lock seat is provided with a flange groove, and the flange ring is disposed in the flange groove so that the flange ring moves along the second direction.

[0014] In some embodiments of this application, the lock seat includes a seat body, a roller bearing, and a bearing pressure plate; the seat body is provided with the mounting groove, and the opposite side walls of the mounting groove are respectively provided with roller grooves; the roller bearing is disposed in the roller groove and rolls with the lock tongue disposed in the mounting groove; the bearing pressure plate is fixedly connected to the seat body and covers the top opening of the roller groove to confine the roller bearing within the roller groove.

[0015] In some embodiments of this application, the first direction is the extension direction of the mounting groove on the lock seat, and the second direction is the height direction of the lock seat; the first direction is perpendicular to the second direction.

[0016] As can be seen from the above technical solution, the beneficial effects of the present invention are as follows:

[0017] This application provides a locking device, which includes a lock seat, a lock tongue, and a drive mechanism. The drive mechanism can drive the lock tongue to extend and retract in a first direction, and simultaneously drive the lock tongue to rise and fall in a second direction to achieve pressing and releasing of the LED box. The two movements are completed synchronously, so that the lock tongue can reliably hook onto the bottom edge of the box and continuously press the box during the locking process, effectively suppressing the shaking of the box during the movement of the transport vehicle and avoiding collisions between adjacent boxes. At the same time, during the unlocking process, the lock tongue can retract and rise synchronously, completely disengaging from the bottom edge of the box, without affecting the quick loading and unloading of the box, thus taking into account both transportation safety and the need for quick on-site assembly and disassembly. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the locking device in this embodiment.

[0019] Figure 2 for Figure 1 A top view of the locking device.

[0020] Figure 3 for Figure 2 A cross-sectional view of the locking device.

[0021] Figure 4 This is a side view of the locking device in the unlocked position.

[0022] Figure 5 This is a side view of the locking device in the locked position.

[0023] Figure 6 This is an exploded view of the locking device.

[0024] Figure 7 This is another exploded view of the locking device.

[0025] Figure 8 This is a three-dimensional structural diagram of the lock seat of the locking device.

[0026] Figure 9 This is a three-dimensional structural diagram of the flange ring of the locking device.

[0027] Figure 10 for Figure 8 An exploded view of the locking seat of the central locking device.

[0028] Figure 11 for Figure 10 A schematic diagram of the three-dimensional structure of the locking seat.

[0029] Figure 12 This is a three-dimensional structural diagram of the locking tongue.

[0030] Figure 13 This is a three-dimensional structural diagram of the rotary drive component and the first transmission component.

[0031] Figure 14 for Figure 13 An exploded view of the rotating drive component and the first transmission component.

[0032] Figure 15 This is a three-dimensional structural diagram of the second transmission component.

[0033] The annotations in the attached figures are explained as follows: 100. Locking device; 10. Lock seat; 11. Seat body; 111. Mounting groove; 112. Flange groove; 113. Spring groove; 114. Roller groove; 115. Connecting through hole; 116. Countersunk hole; 12. Roller bearing; 13. Bearing pressure plate; 14. Pressure plate screw; 20. Lock tongue; 21. Long hole; 22. Limiting groove; 23. Countersunk groove; 30. Drive mechanism; 31. Rotary drive component; 311. Knob; 312. Screw; 313. T-nut; 314. Connecting screw; 32. First transmission component; 33. Second transmission component; 331. Screw hole; 332. Limiting part; 34. Elastic component; 35. Flange ring. Detailed Implementation

[0034] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0035] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Most existing quick-locking devices use a horizontal extension and retraction of the locking tongue to achieve locking, with a fixed height between the locking tongue and the bottom of the transport vehicle. However, due to the limitations of the box's manufacturing precision, if the locking tongue is too low, it may not be able to extend smoothly, affecting locking or even preventing it from locking at all. If the locking tongue is too high, although locking can be achieved, it cannot effectively compress the box. Therefore, this embodiment provides a locking device that can simultaneously press the box downwards and simultaneously spring back upwards to reset during the retraction and unlocking process.

[0038] Please see Figures 1 to 15 The locking device 100 in this embodiment includes a lock seat 10, a lock tongue 20, and a drive mechanism 30.

[0039] The lock base 10 has a mounting groove 111; the bolt 20 is movably mounted on the mounting groove 111 of the lock base 10. The bolt 20 can reciprocate along a first direction and a second direction of the lock base 10, so that the bolt 20 can switch between a locked position and an unlocked position. The drive mechanism 30 is mounted on the lock base 10 and is connected to the bolt 20 for driving the bolt 20 to switch between the locked position and the unlocked position.

[0040] When the drive mechanism 30 drives the latch 20 to move from the unlocked position to the locked position, the latch 20 extends out of the lock seat 10 along the first direction and simultaneously approaches the lock seat 10 along the second direction to press the member to be locked. When the drive mechanism 30 drives the latch 20 to move from the locked position to the unlocked position, the latch 20 partially retracts into the lock seat 10 along the first direction and simultaneously moves away from the lock seat 10 along the second direction to release the pressing of the member to be locked.

[0041] Specifically, the locking device 100 can be installed on the LED display transport vehicle and is correspondingly set in the mounting position on the transport vehicle for placing the LED cabinet. After the LED cabinet is placed on the transport vehicle, the locking tongue 20 engages with the bottom of the cabinet to lock and release the cabinet.

[0042] The first direction is the extension direction of the mounting groove 111 on the lock base 10, meaning the bolt 20 extends and retracts along the extension direction of the mounting groove 111. The second direction is the height direction of the lock base 10, meaning the bolt 20 moves closer to or further away from the lock base 10. The first and second directions are perpendicular to each other. By decomposing the movement of the bolt 20 into two mutually perpendicular directions, the bolt 20 can simultaneously complete the locking position switching and pressing action.

[0043] During the locking process, the drive mechanism 30 drives the locking tongue 20 to move from the unlocked position to the locked position along the first direction, so that the locking tongue 20 extends to a position overlapping with the bottom edge of the box, and simultaneously moves towards the lock seat 10 along the second direction, so that the locking tongue 20 applies a pressing force to the bottom edge of the box, thereby reliably fixing the box to the transport vehicle. Since the locking tongue 20 can simultaneously press the box while locking, it can effectively eliminate the assembly gap between the box and the transport vehicle without relying on the side panel of the transport vehicle for auxiliary limiting, reduce the shaking of the box during transportation, and reduce the risk of collision between adjacent boxes.

[0044] During the unlocking process, the drive mechanism 30 drives the locking tongue 20 to move from the locked position to the unlocked position along the first direction. The locking tongue 20 partially retracts into the lock seat 10, disengaging the locking tongue 20 from the bottom edge of the box. Simultaneously, the locking tongue 20 moves away from the lock seat 10 along the second direction, creating a gap between the locking tongue 20 and the bottom edge of the box. This prevents interference between the box and the locking tongue 20 during loading and unloading, enabling rapid disassembly and reinstallation of the box and improving the turnover efficiency of the transport vehicle.

[0045] By synchronously and compounding the movement of the locking tongue 20 along the first and second directions, a locking method is achieved where the locking tongue 20 simultaneously presses when extended and simultaneously releases when retracted. This not only adapts to height differences caused by cabinet processing dimensions and installation errors, but also continuously applies pressure to the cabinet, improving the stability of the LED display during transportation and meeting the needs for both rapid locking and unlocking.

[0046] Please see Figure 8 and Figure 10 In some embodiments, the lock seat 10 includes a seat body 11, a roller bearing 12, and a bearing pressure plate 13.

[0047] The base 11 has a mounting groove 111, and the opposite side walls of the mounting groove 111 are respectively provided with roller grooves 114. The roller bearing 12 is disposed in the roller groove 114 and can roll with the locking tongue 20 disposed in the mounting groove 111. The bearing pressure plate 13 is fixedly connected to the base 11 and covers the top opening of the roller groove 114 to confine the roller bearing 12 within the roller groove 114.

[0048] Specifically, the base 11 can be integrally formed from metal and has a mounting groove 111 on it. The mounting groove 111 extends along the extension and retraction direction of the locking tongue 20 and is used to accommodate and guide the movement of the locking tongue 20. Roller grooves 114 are respectively provided on the opposite side walls of the mounting groove 111. Each roller groove 114 extends along a second direction and is used to install roller bearings 12.

[0049] Roller bearings 12 are respectively disposed in corresponding roller grooves 114, and a portion of the outer periphery of the roller bearing 12 extends out of the roller groove 114 so as to contact the locking tongue 20 in the mounting groove 111, so that the locking tongue 20 forms a rolling fit with the roller bearing 12 when extending and retracting in the first direction. Compared with the locking tongue 20 directly sliding in contact with the seat 11, the roller bearing 12 can convert the sliding friction generated during the movement of the locking tongue 20 into rolling friction, effectively reducing the movement resistance, reducing the wear between the locking tongue 20 and the seat 11, making the movement of the locking tongue 20 smoother, while reducing the driving force requirement of the drive mechanism 30 and improving the service life of the locking device 100.

[0050] The bearing pressure plate 13 is fixedly connected to the seat body 11 by multiple pressure plate screws 14, which restricts the roller bearing 12 in the corresponding roller groove 114. While ensuring that the roller bearing 12 can roll freely, it restricts its radial disengagement, thereby ensuring that the roller bearing 12 always maintains a stable rolling fit with the locking tongue 20 and improving the overall reliability of the locking device 100.

[0051] Please see Figure 6 and Figure 7 In some embodiments, the drive mechanism 30 includes a rotary drive member 31, a first transmission member 32 and a second transmission member 33 and an elastic member 34.

[0052] The rotary drive component 31 is rotatably connected to the lock seat 10. A first transmission component 32 and a second transmission component 33 are mounted on the rotary drive component 31 and cooperate with the latch 20. The first transmission component 32 drives the latch 20 to move along the first direction when the rotary drive component 31 rotates; the second transmission component 33 drives the latch 20 to move along the second direction when the rotary drive component 31 rotates. An elastic element 34 is disposed between the latch 20 and the lock seat 10. When the second transmission component 33 drives the latch 20 to approach the lock seat 10 along the second direction, it compresses the elastic element 34. When the second transmission component 33 releases its contact with the latch 20, the elastic element 34 drives the latch 20 away from the lock seat 10 along the second direction.

[0053] Specifically, the rotary drive 31 is rotatably connected to the lock seat 10. The first transmission member 32 and the second transmission member 33 are both mounted on the rotary drive 31 and respectively cooperate with the latch 20. The rotary drive 31 serves as a power input component. The first transmission member 32 drives the latch 20 to move along a first direction, thereby switching the latch 20 between a locked position and an unlocked position. The second transmission member 33 drives the latch 20 to move along a second direction, thereby pressing and releasing the latch 20 against the locking element. An elastic member 34 is positioned between the latch 20 and the lock seat 10, providing a restoring force for the latch 20 to move away from the lock seat 10 along the second direction, allowing the latch 20 to automatically return to its initial height.

[0054] During the locking process, the user rotates the rotary drive 31, which drives the first transmission component 32 and the second transmission component 33 to move synchronously. The first transmission component 32 drives the locking tongue 20 to move towards the locking position along the first direction, causing the locking tongue 20 to gradually extend out of the lock seat 10 and enter the locking area of ​​the part to be locked. At the same time, the second transmission component 33 drives the locking tongue 20 to approach the lock seat 10 along the second direction, causing the locking tongue 20 to gradually move downward while extending, and compressing the elastic element 34 disposed between the locking tongue 20 and the lock seat 10. When the locking tongue 20 moves to the locking position, the locking tongue 20 not only forms a locking fit with the part to be locked, but also applies a continuous clamping force to the part to be locked through displacement along the second direction, thereby effectively eliminating the gap between the part to be locked and the lock seat 10 caused by processing errors or assembly errors, improving locking stability, and suppressing the shaking of the part to be locked during transportation.

[0055] During the unlocking process, the user rotates the drive component 31 in the opposite direction. The first transmission component 32 drives the latch 20 to move towards the unlocking position along the first direction, causing the latch 20 to gradually disengage from the locking component. Simultaneously, the second transmission component 33 gradually releases the driving force on the latch 20 along the second direction. The previously compressed elastic component 34 releases its elastic potential energy and pushes the latch 20 away from the lock seat 10 along the second direction, causing the latch 20 to automatically spring back to its initial height. Because the latch 20 completes its springback synchronously during the retraction process, a sufficient clearance can be formed between the latch 20 and the locking component after the latch 20 exits the locking area of ​​the locking component. This prevents friction or jamming between the latch 20 and the locking component, facilitating the quick removal or installation of the locking component and effectively improving the unlocking efficiency of the locking device 100.

[0056] It should be noted that the elastic element 34 can be a compression spring, or it can be a disc spring, wave spring, rubber elastomer, or other elastic element that can provide elastic restoring force. The second transmission element 33 only drives the bolt 20 to approach the lock seat 10 along the second direction and compress the elastic element 34 during the locking process. During the unlocking process, there is no need to actively drive the bolt 20 to rebound. It is only necessary to release the limiting or abutting of the bolt 20, and the elastic potential energy released by the elastic element 34 can be used to drive the bolt 20 to automatically reset, thereby reducing the transmission load of the drive mechanism 30 and simplifying the transmission structure.

[0057] Please see Figures 12 to 15 In some embodiments, the rotary drive 31 includes a knob 311 and a screw 312, with the screw 312 fixedly connected to the knob 311. The latch 20 is provided with an elongated hole 21 extending in a first direction; the end of the screw 312 away from the knob 311 passes through the elongated hole 21 in a second direction and is rotatably connected to the lock seat 10.

[0058] Specifically, the knob 311, serving as the user's operating component, is located on the outside of the lock seat 10. The screw 312 is positioned along the second direction and coaxially arranged with the knob 311. A T-nut 313 is provided at the end of the screw 312 away from the knob 311. The T-nut 313 is located inside the lock seat 10 and can rotate relative to the lock seat 10. A connecting screw 314 passes through the knob 311, screw 312, and T-nut 313, connecting the knob 311, screw 312, and T-nut 313 to connect them into a single unit, enabling them to rotate synchronously.

[0059] like Figure 14 As shown, in some embodiments, one end of the screw 312 is provided with a top plug, and the knob 311 has a socket on the side facing the lock seat 10 that mates with the top plug. The top plug is inserted into the socket of the knob 311, so that the knob 311 and the screw 312 form a circumferential limiting fit, thereby ensuring that the knob 311 can drive the screw 312 to rotate synchronously when it rotates.

[0060] The end of the screw 312 away from the knob 311 has a bottom insertion hole, and the T-nut 313 is inserted into the bottom insertion hole, so that the screw 312 and the T-nut 313 form a circumferential limiting fit, thereby ensuring that the knob 311 can drive the screw 312 and the T-nut 313 to rotate synchronously when it rotates.

[0061] The connecting screw 314 passes sequentially through the knob 311 and the screw 312 in the second direction and is threaded into the threaded hole of the T-nut 313. By tightening the connecting screw 314, the knob 311, the screw 312, and the T-nut 313 are connected to form an integral structure, so that when the knob 311 rotates, it can drive the screw 312 and the T-nut 313 to rotate synchronously.

[0062] like Figure 11 As shown, in this embodiment, the base 11 of the lock seat 10 is provided with a connecting through hole 115 and a countersunk hole 116 coaxial with the connecting through hole 115. The countersunk hole 116 is located on the side of the connecting through hole 115 away from the knob 311, and the diameter of the countersunk hole 116 is larger than the diameter of the connecting through hole 115. A T-nut 313 is disposed in the connecting through hole 115 and the countersunk hole 116 and can rotate relative to the lock seat 10. The large-diameter end of the T-nut 313 engages with the countersunk hole 116 to prevent the rotation drive 31 from disengaging from the lock seat 10.

[0063] Using the above connection method, both ends of the screw 312 are connected to the knob 311 and the T-nut 313 respectively through limiting fits, which can complete power transmission and axial positioning without relying on welding, pin connection or key connection. This can ensure reliable synchronous rotation performance between the knob 311 and the screw 312.

[0064] Of course, in some other embodiments, the screw 312 and the knob 311 can also be fixed by means of threaded connection, key connection, pin connection, welding or interference fit to ensure that there is no relative rotation between the knob 311 and the screw 312. The screw 312 and the lock seat 10 can also be rotatably connected by ball bearings.

[0065] Please see Figures 12 to 14 In some embodiments, the first transmission member 32 is connected to the side of the knob 311 facing the lock seat 10. The axis of the first transmission member 32 is parallel to and spaced apart from the axis of the screw 312. The latch 20 is provided with a limiting groove 22 that cooperates with the first transmission member 32, and the first transmission member 32 is inserted into the limiting groove 22. When the knob 311 drives the first transmission member 32 to rotate, the first transmission member 32 abuts against the inner wall of the limiting groove 22, thereby driving the latch 20 to extend or retract into the lock seat 10 in a first direction.

[0066] Specifically, the first transmission component 32 can be a limit screw. The knob 311 has a threaded mounting hole on the side facing the lock seat 10. The limit screw is threaded into the threaded mounting hole and can be prevented from loosening by a lock washer or a locking structure to ensure that the limit screw will not loosen during long-term repeated rotation. The axis of the first transmission component 32 is parallel to and spaced apart from the axis of the screw 312, that is, the first transmission component 32 is arranged off the central axis of the screw 312, so that the first transmission component 32 can move in a circle around the axis of the screw 312.

[0067] Correspondingly, such as Figure 12 As shown, the latch 20 is provided with a limiting groove 22, which extends in a direction perpendicular to the first direction. The first transmission member 32 is inserted into the limiting groove 22 and can slide along the limiting groove 22. The width of the limiting groove 22 is slightly larger than the diameter of the first transmission member 32, so that the first transmission member 32 can move smoothly in the limiting groove 22 and reliably cooperate with the two side walls of the limiting groove 22, thereby ensuring the stability of the transmission.

[0068] During the locking process, the user can rotate the knob 311 clockwise. The knob 311 drives the first transmission component 32 to rotate synchronously around the axis of the screw 312. Since the first transmission component 32 is inserted into the limiting groove 22, and the locking tongue 20 is guided by the mounting groove 111 and cannot rotate synchronously with the knob 311, the first transmission component 32 gradually abuts against the groove wall on one side of the limiting groove 22 during the circumferential motion, and applies a thrust along the first direction to the groove wall, thereby pushing the locking tongue 20 to move towards the locking position along the first direction, so that the locking tongue 20 gradually extends out of the lock seat 10 and enters the locking area of ​​the part to be locked.

[0069] During the unlocking process, the user rotates the knob 311 in the opposite direction. The first transmission component 32 rotates in the opposite direction around the axis of the screw 312 with the knob 311 and gradually abuts against the groove wall on the other side of the limiting groove 22. This applies a pulling force along the first direction to the locking tongue 20, causing the locking tongue 20 to move towards the unlocking position along the first direction and gradually retract to the lock seat 10, thereby releasing the locking engagement between the locking tongue 20 and the locking component.

[0070] Since the first transmission component 32 is parallel to and eccentrically positioned with the screw 312, the rotational motion of the knob 311 can be directly converted into the linear motion of the locking tongue 20 along the first direction through the cooperation between the first transmission component 32 and the limiting groove 22. There is no need to set up additional connecting rods or shift forks or other transmission mechanisms, which effectively simplifies the overall structure and reduces manufacturing and assembly costs.

[0071] Please see Figure 7 and Figure 15 In some embodiments, the second transmission member 33 is provided with a screw hole 331, and the screw 312 passes through the screw hole 331 and is threadedly connected to the second transmission member 33. When the knob 311 drives the screw 312 to rotate, the second transmission member 33 moves along the axial direction of the screw 312 so as to abut against the locking tongue 20 and move closer to the lock seat 10 along its second direction.

[0072] Furthermore, the second transmission member 33 has a limiting part 332 at one end. The locking tongue 20 has a groove 23 that cooperates with the limiting part 332, and the groove 23 extends along the first direction. The limiting part 332 is accommodated in the groove 23 and restricts the second transmission member 33 from rotating with the screw 312.

[0073] Specifically, the second transmission component 33 is a locking sleeve structure, which is cylindrical in shape. It has a threaded hole 331 that runs through it along the second direction. The threaded hole 331 is provided with an internal thread that matches the external thread of the screw 312, so that the screw 312 and the second transmission component 33 are connected by threaded transmission.

[0074] like Figure 15 As shown, the second transmission member 33 has a limiting part 332 at one end, and the limiting part 332 has a non-circular structure. Figure 12 As shown, the latch 20 is provided with a recess 23 that cooperates with the limiting part 332. The recess 23 can be a U-shaped recess 23 extending along the first direction. The limiting part 332 is accommodated in the U-shaped recess 23 and can slide relative to it along the extending direction of the recess 23. The groove wall of the U-shaped recess 23 forms a circumferential abutment against the limiting part 332 to restrict the second transmission member 33 from rotating synchronously with the screw 312, so that the second transmission member 33 can only be displaced along the axial direction of the screw 312.

[0075] During the locking process, the user rotates knob 311, which drives screw 312 to rotate synchronously. Because the second transmission member 33 is limited by the countersunk groove 23 on the locking tongue 20 and cannot rotate, the threaded pair between screw 312 and the second transmission member 33 converts the rotational motion of screw 312 into linear motion of the second transmission member 33 along the axis of screw 312. As the second transmission member 33 gradually moves towards the locking tongue 20, it abuts against the locking tongue 20 and continuously applies a thrust in the second direction, causing the locking tongue 20 to gradually approach the lock seat 10 in the second direction. Simultaneously, because the first transmission member 32 drives the locking tongue 20 to extend in the first direction, the locking tongue 20 simultaneously completes a downward pressing action during its extension, achieving simultaneous locking and pressing. This presses the part to be locked, eliminating gaps between the part to be locked and the lock seat 10 caused by machining or assembly errors.

[0076] During the unlocking process, the user rotates knob 311 in the opposite direction, causing screw 312 to rotate in the opposite direction as well. Since the second transmission component 33 is still limited by the recess 23 and cannot rotate, screw 312 again drives the second transmission component 33 to move away from the latch 20 via the threaded joint. As the second transmission component 33 gradually disengages from the latch 20, the latch 20 loses the clamping force applied by the second transmission component 33. At this time, under the elastic recovery action of elastic element 34, the latch 20 automatically moves away from the lock seat 10 in the second direction, achieving a springback reset. Simultaneously, the first transmission component 32 drives the latch 20 to retract in the first direction, causing the latch 20 to gradually exit the locking area of ​​the object to be locked, completing the unlocking action.

[0077] Please see Figure 8 and Figure 9 In some embodiments, the drive mechanism 30 further includes a flange ring 35. The flange ring 35 is disposed between the locking tongue 20 and the elastic member 34. The bottom wall of the mounting groove 111 of the lock seat 10 is provided with a flange groove 112, and the flange ring 35 is disposed in the flange groove 112 so that the flange ring 35 can move in a second direction.

[0078] Specifically, the bottom wall of the mounting groove 111 of the seat 11 is provided with a coaxial flange groove 112 and a spring groove 113. The elastic element 34 is a compression spring, one end of which abuts against the bottom of the spring groove 113, and the other end abuts against the flange ring 35, so that the spring is always between the flange ring 35 and the lock seat 10. The flange ring 35 is housed in the flange groove 112, and the groove wall of the flange groove 112 limits the flange ring 35, so that the flange ring 35 can only reciprocate in the second direction, and cannot undergo radial offset or rotation, thereby ensuring the stability of the movement of the flange ring 35.

[0079] During the locking process, the second transmission member 33 moves along the second direction and abuts against the locking tongue 20. The locking tongue 20 further abuts against the flange ring 35 and gradually compresses the elastic member 34 disposed in the spring groove 113. As the elastic member 34 is compressed, elastic potential energy gradually accumulates inside it. During the unlocking process, the second transmission member 33 gradually releases its abutment against the locking tongue 20. The previously compressed elastic member 34 releases the accumulated elastic potential energy and pushes the flange ring 35 away from the lock seat 10 along the second direction. The flange ring 35 transmits the force released by the elastic member 34 to the locking tongue 20, driving the locking tongue 20 away from the lock seat 10 along the second direction, realizing the automatic rebound of the locking tongue 20.

[0080] The flange ring 35 is embedded in the flange groove 112 and moves along the second direction under the guidance of the flange groove 112. This allows the flange ring 35 to effectively isolate the locking tongue 20 from the elastic element 34, ensuring that the elastic element 34 is always compressed within the spring groove 113 and is not subjected to lateral forces due to the extension and retraction of the locking tongue 20 in the first direction, thus preventing the elastic element 34 from bending or tilting. At the same time, the guiding effect of the flange groove 112 on the flange ring 35 also ensures that the elastic element 34 is always compressed and rebounded axially, improving the uniformity of the force on the elastic element 34 and enhancing the movement stability of the locking device 100.

[0081] In one specific embodiment, the locking device 100 can be installed at the bottom of the carrying platform of the transport vehicle. Multiple locking devices 100 can be spaced apart along the length and width of the transport vehicle and respectively cooperate with the bottom edge of the corresponding LED box to independently lock each LED box on the transport vehicle.

[0082] like Figure 4 and Figure 5 As shown, if the thickness of the bottom edge of the LED cabinet is H, the range of motion of the locking tongue 20 in the second direction is CA, where A is the distance between the bottom surface of the locking tongue 20 and the bottom surface of the lock seat 10 when the locking tongue 20 is in the unlocked position, and C is the distance between the bottom surface of the locking tongue 20 and the bottom surface of the lock seat 10 when the locking tongue 20 is in the locked position, and A is greater than C. During installation, the installation height of the lock seat 10 relative to the bottom of the transport vehicle can be adjusted so that the distance between the locking tongue 20 and the bottom edge of the LED cabinet satisfies C < H < A. When the locking tongue 20 is in the unlocked position, since the distance between the bottom surface of the locking tongue 20 and the bottom surface of the lock seat 10 is A, which is greater than the thickness H of the bottom edge of the cabinet, the locking tongue 20 is located below the bottom edge of the cabinet and will not interfere with the bottom edge of the cabinet, making it convenient for the LED cabinet to be placed or removed directly. When the locking tongue 20 moves from the unlocked position to the locked position, the locking tongue 20 extends along the first direction and approaches the lock seat 10 along the second direction, so that the bottom surface of the locking tongue 20 gradually descends to a position C away from the bottom surface of the lock seat 10. Since C is less than the thickness H of the bottom edge of the box, the locking tongue 20 can press against the bottom edge of the box, thereby applying a continuous pressing force to the box while completing the locking.

[0083] If the distance between the head of the latch 20 and the bottom edge of the housing along the first direction is M, and the travel of the latch 20 along the first direction is B and D respectively, where B is the extension of the latch 20 relative to the lock seat 10 when it is in the unlocked position, and D is the extension of the latch 20 relative to the lock seat 10 when it is in the locked position, and D is greater than B. During installation, the relative position between the lock seat 10 and the LED housing along the first direction is adjusted to ensure that B < M < D. When the latch 20 is in the unlocked position, since the extension amount B of the latch 20 is less than the distance M, the head of the latch 20 is completely separated from the bottom edge of the housing, and the housing can be placed or removed directly in the vertical direction without needing to avoid the latch 20. When the latch 20 extends to the locked position, since the extension amount D of the latch 20 reaches the distance M, the head of the latch 20 crosses the bottom edge of the housing and overlaps with the bottom edge of the housing, thereby locking the housing. At the same time, the locking tongue 20 moves downward in the second direction during the extension process, so that the locking tongue 20 not only forms a limit with the bottom edge of the box, but also continuously applies a pressing force to the box, further eliminating the gap between the box and the transport vehicle caused by processing error or assembly error.

[0084] In summary, the locking tongue 20 of this embodiment locks and releases the LED cabinet through its telescopic movement in the first direction, and presses and releases the LED cabinet through its lifting movement in the second direction. These two movements are completed simultaneously, ensuring that the locking tongue 20 reliably hooks onto the bottom edge of the cabinet while continuously pressing it down during locking. This effectively suppresses the cabinet's vertical and horizontal movement during transport vehicle movement, preventing collisions between adjacent cabinets. Simultaneously, during unlocking, the locking tongue 20 retracts and rises synchronously, completely disengaging from the bottom edge of the cabinet, without affecting the rapid loading and unloading of the cabinet. This balances transport safety with the need for quick on-site assembly and disassembly.

[0085] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A locking device, characterized in that, include: Lock base, which has a mounting groove; The locking tongue is movably mounted on the mounting groove of the lock seat. The locking tongue can reciprocate along the first and second directions of the lock seat to switch between the locked position and the unlocked position. A drive mechanism, which is mounted on the lock seat and connected to the lock tongue, is used to drive the lock tongue to switch between the locked position and the unlocked position. When the driving mechanism drives the bolt to move from the unlocked position to the locked position, the bolt extends out of the lock seat along the first direction and simultaneously approaches the lock seat along the second direction to press the member to be locked; when the driving mechanism drives the bolt to move from the locked position to the unlocked position, the bolt partially retracts to the lock seat along the first direction and simultaneously moves away from the lock seat along the second direction to release the pressing of the member to be locked.

2. The locking device according to claim 1, characterized in that, The driving mechanism includes a rotary driving component, a first transmission component, and a second transmission component; The rotary drive is rotatably connected to the lock seat, and the first transmission component and the second transmission component are disposed on the rotary drive and cooperate with the lock tongue; The first transmission member is used to drive the locking tongue to move along the first direction when the rotary drive member rotates; the second transmission member is used to drive the locking tongue to move along the second direction when the rotary drive member rotates.

3. The locking device according to claim 2, characterized in that, The driving mechanism further includes an elastic element; the elastic element is disposed between the bolt and the lock seat, and the second transmission member compresses the elastic element when driving the bolt to approach the lock seat in the second direction; when the second transmission member releases its contact with the bolt, the elastic element drives the bolt to move away from the lock seat in the second direction.

4. The locking device according to claim 2, characterized in that, The rotary drive includes a knob and a screw; the screw is fixedly connected to the knob; the latch has an elongated hole that extends along a first direction; one end of the screw away from the knob passes through the elongated hole along a second direction and is rotatably connected to the lock seat.

5. The locking device according to claim 4, characterized in that, The first transmission component is connected to the side of the knob facing the lock seat; the axis of the first transmission component is parallel to and spaced apart from the axis of the screw. The latch is provided with a limiting groove that cooperates with the first transmission member, and the first transmission member is inserted into the limiting groove. When the knob drives the first transmission member to rotate, the first transmission member abuts against the inner wall of the limiting groove, thereby driving the latch to extend or retract to the lock seat in the first direction.

6. The locking device according to claim 4, characterized in that, The second transmission component is provided with a screw hole, and the screw passes through the screw hole and is threadedly connected to the second transmission component; when the knob drives the screw to rotate, the second transmission component moves along the axis of the screw so as to abut against the locking tongue and move closer to the lock seat along its second direction.

7. The locking device according to claim 6, characterized in that, The second transmission member has a limiting part at one end; the locking tongue has a groove that cooperates with the limiting part, and the groove extends along a first direction; the limiting part is accommodated in the groove and restricts the second transmission member from rotating with the screw.

8. The locking device according to claim 3, characterized in that, The drive mechanism further includes a flange ring disposed between the locking tongue and the elastic element; the bottom wall of the mounting groove of the lock seat is provided with a flange groove, and the flange ring is disposed in the flange groove so that the flange ring moves along the second direction.

9. The locking device according to claim 1, characterized in that, The lock seat includes a seat body, a roller bearing, and a bearing pressure plate; the seat body is provided with the mounting groove, and the opposite side walls of the mounting groove are respectively provided with roller grooves; the roller bearing is disposed in the roller groove and rolls with the lock tongue disposed in the mounting groove; the bearing pressure plate is fixedly connected to the seat body and covers the top opening of the roller groove to confine the roller bearing within the roller groove.

10. The locking device according to claim 1, characterized in that, The first direction is the extension direction of the mounting groove on the lock seat, and the second direction is the height direction of the lock seat; the first direction is perpendicular to the second direction.

Images