Locking device of display unit and display screen

Abstract

The utility model relates to a locking device of a display unit and a display screen, and belongs to the technical field of assembly of display screens. The locking device comprises a lock catch, a fixed seat, a lock rod, a handle and a locking unit; a through hole is formed in the fixed seat; the lock rod is arranged in the through hole of the fixing base in a penetrating mode and can move along the axis of the through hole. The first end of the lock rod can extend out of the fixed seat to be clamped with the lock catch; the handle is fixed to the second end of the lock rod and used for driving the lock rod to move. The locking unit is positioned between the fixed seat and the handle; the locking unit at least has a locking state and an unlocking state which can be switched. In the locking state, the locking unit can only rotate around the locking rod in one direction, so that the locking unit can only fasten two adjacent display units; in the unlocking state, the locking unit can rotate bidirectionally around the locking rod, so that the two adjacent display units can be disassembled, the problem that unlocking is easy to touch by mistake during quick locking operation can be solved, and the locking stability of the locking device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen assembly, and particularly relates to a locking device for a display unit and a display screen. Background Art

[0002] Currently, with the rapid development of the LED industry, the rental of LED display screens is extremely popular. The display screen is often transported to various production sites, and the safety during transportation and the efficiency of display screen erection have become top priorities.

[0003] Currently, the mainstream design of LED boxes is to set the handle on the display module and match it with a general quick lock to achieve single-person hoisting operation.

[0004] The interval space between the handle and the quick lock on the existing display unit is narrow. During installation, the quick lock needs to be disassembled and then installed, and the installation and replacement steps are cumbersome. Moreover, the existing quick lock is prone to accidental touch during operation, resulting in accidental unlocking, thereby increasing the risk of safety hazards during the transportation or erection of the display screen. Therefore, an improved locking mechanism is urgently needed to ensure that accidental unlocking can be effectively avoided during use. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the technical problem that the quick lock of the traditional locking device for a display unit is prone to accidental touch, resulting in accidental unlocking.

[0006] To solve the above technical problem, the present application provides a locking device for a display unit, including: a lock catch for fixing on a display unit; a fixed seat for fixing on another display unit; a through hole is provided in the fixed seat; a lock rod is arranged in the through hole of the fixed seat and can move along the axis of the through hole; the lock rod includes opposite first and second ends, and the first end of the lock rod can extend out of the fixed seat to engage with the lock catch; a handle is fixed on the second end of the lock rod for driving the lock rod to move; a locking unit is rotatably connected to the lock rod and is located between the fixed seat and the handle; the locking unit at least has switchable locking and unlocking states; wherein, in the locking state, the locking unit is limited to be able to rotate unidirectionally around the lock rod in a first direction, so that the locking unit approaches and abuts against the fixed seat to tightly abut the lock catch and the fixed seat; in the unlocking state, the locking unit can rotate bidirectionally around the lock rod in the first direction and in a second direction opposite to the first direction. When the locking unit rotates around the lock rod in the second direction, the locking unit moves away from the fixed seat and releases the tight abutment between the lock catch and the fixed seat.

[0007] In some embodiments of the present application, the locking unit includes: a locking handle rotatably connected to the locking rod, the locking handle being rotatable around the locking rod to move away from or close to the fixed seat; a one-way locking member rotatably connected to the locking handle, and a locking portion matching the one-way locking member is provided on the locking rod; when the locking unit is in the locked state, the one-way locking member abuts against the locking portion on the locking rod to limit the one-way rotation of the locking handle in the first direction close to the fixed seat; when the locking unit is in the unlocked state, the one-way locking member disengages from the locking portion on the locking rod, and the locking handle can rotate bidirectionally around the locking rod.

[0008] In some embodiments of the present application, the one-way locking member includes a body, a tooth portion, and an unlocking portion; the tooth portion protrudes from one end of the body facing the locking rod, and the unlocking portion is provided at one end of the body away from the locking rod and extends outside the locking handle; the locking portion is a ratchet tooth sleeved on the second end of the locking rod; when the locking unit is in the locked state, the tooth portion and the locking portion are engaged with each other, and the tooth portion can only rotate unidirectionally relative to the locking rod; when the unlocking portion is pressed to disengage the tooth portion from the locking portion, the locking unit is switched from the locked state to the unlocked state, and the locking handle can rotate bidirectionally.

[0009] In some embodiments of the present application, the locking unit includes a first elastic member; the first elastic member is disposed between the locking handle and the one-way locking member, and both ends of the first elastic member are respectively in contact with the locking handle and the one-way locking member to maintain the abutment between the one-way locking member and the locking portion on the locking rod.

[0010] In some embodiments of the present application, the locking handle includes a sleeve and a pushing portion; an internal thread is provided inside the sleeve, and an external thread is provided on the outer side of the locking rod near the second end, and the sleeve is threadedly connected to the locking rod; the pushing portion is fixed on the outer side wall of the sleeve and can drive the sleeve to rotate relative to the locking rod.

[0011] In some embodiments of the present application, the locking device includes a second elastic member; the second elastic member is sleeved on the locking rod, and both ends of the second elastic member are respectively in contact with the fixed seat and the locking unit.

[0012] In some embodiments of the present application, a guiding groove is provided on the locking rod, and the guiding groove extends along the axial direction of the locking rod; a guiding member is provided on the fixed seat, one end of the guiding member extends into the through hole of the fixed seat and is received in the guiding groove of the locking rod; the guiding member can slide relatively along the extending direction of the guiding groove.

[0013] In some embodiments of the present application, the lock buckle includes a shell, a locking plate and a third elastic member; plug-in holes are provided at both ends of the shell; the locking plate is movably arranged in the shell, and a limiting hole is provided on the locking plate; the third elastic member is arranged in the shell and abuts against the shell and the locking plate, so as to drive the locking plate to move and reset; a card slot is provided at the first end of the locking rod; when the first end of the locking rod is inserted into the plug-in interface and the limiting hole of the lock buckle; the third elastic member abuts against the locking plate to move, so that the locking plate is inserted into the card slot of the locking rod, so as to engage the first end of the locking rod with the lock buckle.

[0014] In some embodiments of the present application, the handle includes a gripping portion and a connecting portion; the connecting portion is vertically arranged at one end of the gripping portion, and a connecting hole is provided on the connecting portion; the second end of the locking rod is accommodated in the connecting hole and is fixed to the connecting portion by a fastener.

[0015] The present application also provides a display screen, comprising: a display unit, provided with a plurality of display units, wherein the plurality of display units are spliced ​​in sequence; a locking device of the display unit as described above; a lock of the locking device is arranged on a side wall of a display unit, and a fixing seat of the locking device is fixed on a side wall of another adjacent display unit; a locking rod in the fixing seat extends into the lock and is engaged and fixed with the lock; the lock is fastened to the fixing seat by rotating the locking unit, so that adjacent display units are spliced ​​and fixed.

[0016] It can be seen from the above technical solution that the beneficial effects of the utility model are:

[0017] The present application provides a locking device and a display screen for a display unit. A handle is provided on the locking rod of the locking device. The handle is convenient for the user to hold, which makes the disassembly and assembly of the locking device and the display unit more convenient. The entire locking device can be quickly installed on different display units to achieve a quick connection between multiple different display units. In addition, the locking unit provided on the locking rod has a mutually switchable locking state and unlocking state; in the locked state, the locking unit can only rotate unidirectionally around the locking rod, so that it can only fasten two adjacent display units; and only in the unlocked state can the locking unit rotate bidirectionally around the locking rod, thereby achieving the disassembly of two adjacent display units, which can solve the problem of easy accidental touch during the quick lock operation, resulting in accidental unlocking, and effectively improve the locking stability of the locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the locking device.

[0019] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the middle locking device.

[0020] Figure 3 is Figure 2 The three-dimensional structure schematic diagram of the middle locking rod.

[0021] Figure 4 is Figure 2 The three-dimensional structure schematic diagram of the middle locking handle.

[0022] Figure 5 is Figure 2 The three-dimensional structure schematic diagram of the middle one-way locking part.

[0023] Figure 6 is Figure 2 The three-dimensional structure schematic diagram of the middle fixed seat.

[0024] Figure 7 is Figure 2 The exploded structure schematic diagram of the middle lock catch.

[0025] Figure 8 is the cross-sectional schematic diagram of the locking unit in the locked state.

[0026] Figure 9 is the cross-sectional schematic diagram of the locking unit in the unlocked state.

[0027] Figure 10 is the structure schematic diagram when the two display units are locked before docking.

[0028] Figure 11 is Figure 10 The structure schematic diagram when the two display units are docked.

[0029] Figure 12 is Figure 11 The structure schematic diagram when the two display units are padlocked after docking.

[0030] Figure 13 is Figure 12 The structure schematic diagram when the two display units are docked and locked.

[0031] Figure 14 is the front view and side view structure schematic diagram of the locking device in the locked state.

[0032] Figure 15 is the front view and side view structure schematic diagram of the locking device in the padlocked state.

[0033] Figure 16 is the front view and side view structure schematic diagram of the locking device in the locked state.

[0034] The description of the reference numerals is as follows:

[0035] 100, locking device; 10, lock buckle; 11, housing; 111, plug hole; 112, base; 113, bottom pressure plate; 12, lock piece; 121, lock tongue; 1211, limit hole; 1212, support arm; 122, lock cap; 13, third elastic member; 14, second pressure plate screw; 20, fixing seat; 21, through hole; 22, threaded hole; 23, annular groove; 24, guide member; 25, second elastic member; 30, lock rod; 31, first end; 3 2. second end; 33. guide groove; 34. external thread; 35. locking portion; 36. slot; 40. handle; 41. gripping portion; 42. connecting portion; 43. fastener; 50. locking unit; 51. locking handle; 511. sleeve; 512. pushing portion; 52. one-way locking member; 521. body; 522. latching tooth portion; 523. unlocking portion; 53. first elastic member; 54. safety pressure plate; 55. first pressure plate screw; 200. display unit. DETAILED DESCRIPTION

[0036] Typical embodiments that embody 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 changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0037] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] See also Figures 1 to 16 This embodiment provides a locking device 100 for a display unit 200, which is used to lock adjacent display units 200 to avoid accidental unlocking during use.

[0040] See also Figures 1 to 3 The locking device 100 includes a lock buckle 10, a fixing seat 20, a locking rod 30, a handle 40 and a locking unit 50.

[0041] Among them, the buckle 10 is used to be fixed on a display unit 200. The fixing base 20 is used to be fixed on another display unit 200. When adjacent display units 200 are connected, the buckle 10 on one display unit 200 and the fixing base 20 on another display unit 200 are arranged correspondingly. A through hole 21 is provided in the fixing base 20, and the through hole 21 is used for the locking rod 30 to pass through.

[0042] The locking rod 30 is arranged in the through hole 21 of the fixing base 20 and can move along the axis of the through hole 21. The locking rod 30 includes opposite first end 31 and second end 32; the first end 31 of the locking rod 30 can extend out of the fixing base 20 to engage with the buckle 10, so that two adjacent display units 200 can be preliminarily fixed.

[0043] The handle 40 is fixed on the second end 32 of the locking rod 30. A user can hold the handle 40 to drive the locking rod 30 to move, so that the first end 31 of the locking rod 30 penetrates out of the fixing base 20 to engage with the buckle 10.

[0044] The locking unit 50 is rotatably connected to the locking rod 30 and is located between the fixing base 20 and the handle 40. And the locking unit 50 has at least a switchable locked state and unlocked state.

[0045] In the locked state, the locking unit 50 is limited to be able to rotate unidirectionally around the locking rod 30 in the first direction, so that the locking unit 50 approaches and abuts against the fixing base 20 to tightly press the buckle 10 against the fixing base 20. In the unlocked state, the locking unit 50 can rotate bidirectionally around the locking rod 30 in the first direction and in the second direction opposite to the first direction. When the locking unit 50 rotates around the locking rod 30 in the second direction, the locking unit 50 moves away from the fixing base 20 and releases the tight pressing between the buckle 10 and the fixing base 20.

[0046] During actual use, the handle 40 can be held to make the first end 31 of the locking rod 30 penetrate out of the fixing base 20, so that the first end 31 of the locking rod 30 engages and fixes with the buckle 10. At this time, the locking unit 50 is in the locked state, and it can only rotate unidirectionally around the locking rod 30 in the first direction to approach and abut against the fixing base 20 to lock the fixing base 20 and the buckle 10 tightly. The first direction can be the clockwise direction or the counterclockwise direction.

[0047] When it needs to be disassembled, the locking unit 50 can be first switched to the unlocked state. At this time, the locking unit can rotate bidirectionally. The user can rotate the locking unit 50 in the second direction opposite to the first direction to make the locking unit 50 move away from the fixing base 20, and then the tight pressing between the fixing base 20 and the buckle 10 can be released, and further the disassembly between the two display units 200 can be realized.

[0048] The locking unit 50 in this embodiment can rotate bidirectionally around the locking rod 30 only in the unlocked state, thereby realizing the disassembly of two adjacent display units 200. It can solve the problem of easy accidental touch during traditional quick lock operation, resulting in accidental unlocking, and effectively improves the locking stability of the locking device 100.

[0049] See also Figure 2 In some embodiments, the locking unit 50 may include a locking handle 51 and a one-way locking member 52. The one-way locking member 52 is connected to the locking handle 51 to control the rotation of the locking handle 51.

[0050] The locking handle 51 is rotatably connected to the locking rod 30, and the locking handle 51 can rotate around the locking rod 30 to move away from or fix the seat 20. The one-way locking member 52 is rotatably connected to the locking handle 51, and the locking rod 30 is provided with a locking portion 35 matching the one-way locking member 52.

[0051] When the locking unit 50 is in the locked state, the one-way locking member 52 abuts against the locking portion 35 on the locking rod 30 to limit the locking handle 51 to rotate in one direction in a first direction close to the fixing seat 20. When the locking unit 50 is in the unlocked state, the one-way locking member 52 is disengaged from the locking portion 35 on the locking rod 30, and the locking handle 51 can rotate bidirectionally around the locking rod 30. At this time, the locking handle 51 and the one-way locking member 52 can rotate in a second direction opposite to the first direction, so that the locking handle 51 is away from the fixing seat 20, thereby releasing the abutment between the lock buckle 10 and the fixing seat 20.

[0052] See also Figure 2 , Figure 8 and Figure 9 In some embodiments, the locking unit 50 further includes a safety pressure plate 54 and a first pressure plate screw 55 .

[0053] The safety pressure plate 54 and the one-way locking member 52 are provided with through holes, and the first pressure plate screw 55 passes through the through holes on the safety pressure plate 54 and the one-way locking member 52 in sequence and is connected to the locking handle 51. The axial diameter of the through hole on the one-way locking member 52 is larger than the axial diameter of the first pressure plate screw 55, so that the one-way locking member 52 can rotate around the axis of the first pressure plate screw 55 to achieve the rotational connection between the one-way locking member 52 and the locking handle 51. When the one-way locking member 52 rotates around the axis of the first pressure plate screw 55 and moves away from or close to the locking portion 35 on the locking rod 30, the locking unit 50 can be switched between the locked state and the unlocked state.

[0054] Of course, in some other embodiments, the one-way locking member 52 can also be rotatably connected to the locking handle 51 through structures such as bearings or rotating shafts. As long as the one-way locking member 52 and the locking handle 51 can be rotatably connected, no excessive restrictions are made here.

[0055] It should be understood that in some embodiments, the rotation unlocking direction of the one-way locking member 52 is the same as the rotation direction of the locking handle 51 away from the fixed seat 20, that is, the rotation unlocking direction of the one-way locking member 52 is also the second direction. This enables the user to unlock the locking unit 50 by pressing the one-way locking member 52, and at the same time, can drive the locking handle 51 to rotate in the second direction away from the fixed seat 20, so that the user can release the tightening between the lock catch 10 and the fixed seat 20 with one hand, thereby realizing the quick disassembly between the lock rod 30 and the lock catch 10.

[0056] Please refer to Figure 4 , in some embodiments, the locking handle 51 includes a sleeve 511 and a pushing portion 512. The sleeve 511 is in a circular ring shape, and an internal thread is provided inside the sleeve 511. An external thread 34 is provided on the outer side of the lock rod 30 near the second end 32, and the sleeve 511 is sleeved on the external thread 34 of the lock rod 30, so that the locking handle 51 can be rotationally connected relative to the lock rod 30. The pushing portion 512 is fixed on the outer side wall of the sleeve 511 and extends towards the outside of the sleeve 511, so as to facilitate the user to abut against and drive the sleeve 511 to rotate relative to the lock rod 30.

[0057] Please refer to Figure 2 , Figure 3 and Figure 5 , in some embodiments, the one-way locking member 52 includes a main body 521, a tooth engaging portion 522 and an unlocking portion 523. The tooth engaging portion 522 protrudes from one end of the main body 521 facing the lock rod 30, and the unlocking portion 523 is provided at one end of the main body 521 away from the lock rod 30 and extends out of the locking handle 51.

[0058] Among them, the locking portion 35 is a ratchet tooth sleeved on the second end 32 of the lock rod 30. The inclination direction of the teeth on the ratchet tooth is opposite to the inclination direction of the teeth on the tooth engaging portion 522. When the tooth engaging portion 522 on the one-way locking member 52 meshes with the ratchet tooth on the lock rod 30, a ratchet mechanism that can only rotate in one direction can be formed.

[0059] As Figure 8 and Figure 9 shown, when the locking unit 50 is in the locked state, the tooth engaging portion 522 and the locking portion 35 are engaged with each other, and the tooth engaging portion 522 can only rotate in one direction relative to the locking portion 35. The locking handle 51 connected to the one-way locking member 52 can also only rotate in one direction around the lock rod 30. When the unlocking portion 523 is pressed to rotate the one-way locking member 52 to disengage the tooth engaging portion 522 from the locking portion 35, the locking unit 50 switches from the locked state to the unlocked state, and the locking handle 51 can rotate bidirectionally.

[0060] Please refer to Figure 2, in some embodiments, the locking unit 50 includes a first elastic member 53. The first elastic member 53 is disposed between the locking handle 51 and the one-way locking member 52. Two ends of the first elastic member 53 are respectively abutted against the locking handle 51 and the one-way locking member 52, so as to maintain the abutment between the one-way locking member 52 and the locking portion 35 on the locking rod 30.

[0061] Specifically, the first elastic member 53 is a torsion spring. The main body of the torsion spring is sleeved on the first pressing plate screw 55. One end of the torsion spring is abutted against the locking handle 51, and the other end of the torsion spring is abutted against the one-way locking member 52. The torsion spring can provide a rotational reset force, so that when the one-way locking member 52 is not affected by other external forces, the engaging teeth portion 522 of the one-way locking member 52 and the locking portion 35 on the locking rod 30 are kept in a locked state of engagement.

[0062] As Figure 8 and Figure 9 shown, when the user presses the unlocking portion 523 on the one-way locking member 52 to rotate the one-way locking member 52, the first elastic member 53 stores elastic potential energy. After the user releases the unlocking portion 523 on the one-way locking member 52, the first elastic member 53 releases the elastic potential energy, and automatically drives the one-way locking member 52 to rotate and reset, so that the engaging teeth portion 522 and the locking portion 35 on the locking rod 30 are engaged with each other.

[0063] Please refer to Figure 2 , in some embodiments, the locking device 100 includes a second elastic member 25. The second elastic member 25 is sleeved on the locking rod 30, and two ends of the second elastic member 25 are respectively abutted against the fixed seat 20 and the locking unit 50.

[0064] Specifically, the second elastic member 25 is a compression spring, and two ends thereof are respectively abutted against opposite surfaces of the fixed seat 20 and the locking handle 51. When the locking rod 30 moves towards the first end 31 and is connected to the lock catch 10, the locking handle 51 will press against the second elastic member 25 to compress and store energy in the second elastic member 25.

[0065] When the first end 31 of the locking rod 30 is separated from the lock catch 10; the second elastic member 25 will elongate and recover its deformation. At this time, the second elastic member 25 presses against the locking handle 51, and further drives the locking rod 30 on the locking handle 51 to move along the through hole 21 of the fixed seat 20 towards the second end 32, so that the first end 31 of the locking rod 30 retracts into the fixed seat 20, realizing the automatic retraction of the locking rod 30, so as to effectively improve the disassembly and assembly speed between the two display units 200.

[0066] Please refer to Figure 2 and Figure 6, in some embodiments, an annular groove 23 for accommodating a second elastic member 25 is further formed on the opposite surface of the fixed seat 20 and the locking handle 51. When the opposite planes of the locking handle 51 and the fixed seat 20 are in mutual abutment, the second elastic member 25 can be compressed within the annular groove 23 of the fixed seat 20 and the locking handle 51.

[0067] Please refer to Figure 3 and Figure 6 , in some embodiments, a guiding groove 33 is provided on the locking rod 30. The guiding groove 33 extends along the axial direction of the locking rod 30. A guiding member 24 is provided on the fixed seat 20. One end of the guiding member 24 extends into the through hole 21 of the fixed seat 20 and is accommodated within the guiding groove 33 of the locking rod 30; the guiding member 24 can slide relatively along the extending direction of the guiding groove 33.

[0068] Specifically, a threaded hole 22 is formed on the fixed seat 20. The axis of the threaded hole 22 is perpendicular to the axis of the through hole 21 of the fixed seat 20. The guiding member 24 is a limit screw, and the limit screw is connected to the threaded hole 22 on the fixed seat 20 so as to extend into the through hole 21 of the fixed seat 20.

[0069] When the locking rod 30 is accommodated within the through hole 21 of the fixed seat 20, the inner end of the guiding member 24 is inserted into the guiding groove 33 of the locking rod 30 to limit the locking rod 30 to reciprocate only along the axial direction of the through hole 21 of the fixed seat 20. At this time, the length of the guiding groove 33 is the moving stroke of the locking rod 30, and it can be designed according to the actual application situation.

[0070] Please refer to Figure 7 , in some embodiments, the buckle 10 includes a housing 11, a locking piece 12, and a third elastic member 13. A plug hole 111 is formed on the housing 11. The locking piece 12 is movably arranged within the housing 11, and a limiting hole 1211 is formed on the locking piece 12. The third elastic member 13 is arranged within the housing 11 and abuts against the housing 11 and the locking piece 12 for driving the locking piece 12 to move back to its original position.

[0071] As Figure 3 shown, a clamping groove 36 is formed at the first end 31 of the locking rod 30. After the first end 31 of the locking rod 30 is inserted into the plug hole 111 and the limiting hole 1211 of the buckle 10, the third elastic member 13 presses the locking piece 12 to move, so that the locking piece 12 is embedded into the clamping groove 36 of the locking rod 30 to clamp the first end 31 of the locking rod 30 with the buckle 10.

[0072] Please refer to Figure 7, in some embodiments, the housing 11 includes a base 112 and a bottom pressing plate 113. Corresponding insertion holes 111 are provided on both the bottom pressing plate 113 and the base 112 for the locking rod 30 to be inserted. The bottom pressing plate 113 and the base 112 are connected and fixed by second pressing plate screws 14 to form a receiving chamber, and the locking piece 12 is movably arranged in the receiving chamber.

[0073] Please refer to Figure 7 , the locking piece 12 includes a locking tongue 121 and a locking cap 122. The locking tongue 121 is located between the bottom pressing plate 113 and the base 112. The locking tongue 121 is slidably arranged in the receiving chamber. The locking cap 122 is fixed on the locking tongue 121 and is located outside the bottom pressing plate 113 and the base 112. The user can move the locking tongue 121 by pressing the locking cap 122.

[0074] In some embodiments, a limiting hole 1211 is provided at the center of the locking tongue 121, and the limiting hole 1211 corresponds to the insertion hole 111 on the housing 11. Support arms 1212 are provided on both sides of the locking tongue 121. One end of the third elastic member 13 abuts against the support arm 1212, and the other end of the third elastic member 13 abuts against the base 112, so that when the locking piece 12 is not subjected to other external forces, the limiting hole 1211 on the locking tongue 121 is staggered from the insertion hole 111 on the housing 11.

[0075] Please refer to Figure 3 and Figure 7 , in some embodiments, the head of the first end 31 of the locking rod 30 is in the shape of a gradually shrinking frustum. The inner wall of the limiting hole 1211 on the locking piece 12 has an arc-shaped slope. When the user moves the locking rod 30 through the handle 40 to move the locking rod 30 towards the lock catch 10, the frustum-shaped head of the locking rod 30 can abut against the arc-shaped slope of the limiting hole 1211 of the locking tongue 121, causing the locking piece 12 to move away from the locking cap 122 and compressing the third elastic member 13 to store energy. When the head of the locking rod 30 passes through the locking tongue 121, the third elastic member 13 in the lock catch 10 resumes deformation and abuts against the locking tongue 121 to move towards the locking cap 122, causing the limiting hole 1211 to be staggered from the insertion hole 111. At this time, the locking tongue 121 is caught in the card slot 36 on the locking rod 30, realizing the fixation between the locking rod 30 and the lock catch 10.

[0076] When the locking rod 30 needs to be withdrawn from the lock catch 10, only need to press the locking cap 122 on the locking piece 12 to make the limiting hole 1211 on the locking tongue 121 completely aligned with the insertion hole 111 on the housing 11. At this time, under the action of the second elastic member 25, the locking rod 30 automatically withdraws from the limiting hole 1211 and the insertion hole 111 of the lock catch 10, thereby realizing the complete separation between the locking rod 30 and the lock catch 10.

[0077] In some embodiments, fixing holes are provided on the fixing base 20 and the lock buckle 10 shell 11, and the fixing holes can cooperate with screws to quickly install and fix the fixing base 20 and the lock buckle 10 to the display unit 200, so as to achieve a quick connection between the locking device 100 and the display unit 200.

[0078] See also Figure 2 In some embodiments, the handle 40 includes a grip portion 41 and a connection portion 42. The connection portion 42 is vertically disposed at one end of the grip portion 41. A connection hole is formed on the connection portion 42. The second end 32 of the locking rod 30 is received in the connection hole and fixed to the connection portion 42 by a fastener 43.

[0079] Specifically, the connecting portion 42 is annular, and a connecting hole is provided on the end surface facing the locking rod 30, so that the second end 32 of the locking rod 30 can be partially accommodated in the connecting hole. A countersunk hole is provided on the end surface of the connecting portion 42 away from the locking rod 30, and the fastener 43 is a fixing screw, which passes through the countersunk hole on the connecting portion 42 and is threadedly connected to the second end 32 of the locking rod 30, so as to fix the locking rod 30 on the handle 40 for the user to hold.

[0080] Installing the handle 40 on the locking rod 30 makes it more convenient to assemble and disassemble the locking device 100 and the display unit 200 , and the entire locking device 100 can be quickly installed on different display units 200 to achieve quick connection between multiple display units 200 .

[0081] See also Figures 10 to 16 This embodiment further provides a display screen, which includes a display unit 200 and the above-mentioned locking device 100.

[0082] There may be a plurality of display units 200, each of which is formed by splicing a plurality of display modules, and a plurality of display units 200 are sequentially spliced ​​to form a display screen. The lock 10 of the locking device 100 is arranged on the side wall of a display unit 200, and the fixing seat 20 of the locking device 100 is fixed on the side wall of another adjacent display unit 200, and the fixing seat 20 is arranged opposite to the lock 10. The locking rod 30 in the fixing seat 20 can extend into the lock 10 and be engaged and fixed with the lock 10. Then, the lock 10 is fastened to the fixing seat 20 by rotating the locking unit 50, so that the adjacent display units 200 are spliced ​​and fixed.

[0083] For example, two display units 200 can be spliced ​​by the following steps:

[0084] See also Figure 10 and Figure 14, on the display unit 200, the locking device is in the locked state before docking. At this time, the locking rod 30 on the fixed seat 20 is in the retracted state under the action of the second elastic member 25, and the head of the locking rod 30 does not protrude beyond the outer side surface of the fixed seat 20.

[0085] Please refer to Figure 11 , when it is necessary to fix two display units 200, the user can hold the handle 40 to make the display unit 200 stand upright. At this time, lift the display unit 200, and the display unit 200 can move downward under its own weight, so that the fixed seat 20 compresses the second elastic member 25, and the first end 31 of the locking rod 30 protrudes beyond the outer side surface of the fixed seat 20.

[0086] Please refer to Figure 12 and Figure 15 , the user can hold the handle 40 and drive the display unit 200 to move, so that the first end 31 of the locking rod 30 on the display unit 200 is inserted into the lock buckle 10 of another display unit 200. The locking piece 12 in the lock buckle 10 is automatically engaged with the card slot 36 on the locking rod 30 under the drive of the third elastic member 13, realizing the connection between the locking rod 30 and the lock buckle 10. At this time, as Figure 15 shown, there is a gap a between the side surface of the fixed seat 20 opposite to the lock buckle 10, and the locking device 100 on the two display units 200 is in the padlock state without being fully fastened.

[0087] Please refer to Figure 13 and Figure 16 , while holding the handle 40, the user can stretch out the thumb to dial the pushing portion 512 of the locking handle 51, so that the locking handle 51 rotates in the first direction, and then approaches and abuts against the fixed seat 20, so that the opposite surfaces of the fixed seat 20 and the lock buckle 10 are completely attached to fully fasten the two display units 200.

[0088] When it is necessary to disassemble the two display units 200. The user can hold the handle 40 and press the unlocking portion 523 of the one-way locking member 52 with the thumb, so that the tooth portion 522 of the one-way locking member 52 is separated from the locking portion 35 on the locking rod 30. Since the direction of pressing the one-way locking member 52 is the second direction, while pressing the unlocking portion 523 with the thumb, the user can continue to forcefully dial back the locking handle 51, so that the locking handle 51 rotates in the second direction opposite to the first direction, and the locking handle 51 is away from the fixed seat 20, releasing the abutment between the lock buckle 10 and the fixed seat 20.

[0089] At this time, the user can press the lock cap 122 of the locking piece 12 to align the limit hole 1211 and the insertion hole 111, and then the locking rod 30 can be withdrawn from the lock buckle 10. When the display unit 200 is placed stably, the locking rod 30 retracts into the fixed seat 20 under the action of the second elastic member 25 to realize the complete separation between the two display units 200.

[0090] In summary, the present embodiment provides a locking device 100 for a display unit 200 and a display screen. A handle 40 is provided on the locking rod 30 of the locking device 100. The handle 40 is convenient for a user to hold, which makes the disassembly and assembly of the locking device 100 and the display unit 200 more convenient. The entire locking device 100 can be quickly installed on different display units 200 to achieve rapid connection between multiple different display units 200.

[0091] Moreover, the locking unit 50 provided on the locking rod 30 has lock states and unlock states that can be switched with each other. In the locked state, the locking unit 50 can only rotate unidirectionally around the locking rod 30, so that it can only fasten two adjacent display units 200; and only in the unlocked state can the locking unit 50 rotate bidirectionally around the locking rod 30, thereby realizing the disassembly of two adjacent display units 200. This can solve the problem that accidental unlocking is easily caused by accidental touch during rapid locking operation, and effectively improve the locking stability of the locking device 100.

[0092] Although the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A locking device for a display unit, characterized in that, Comprising: A lock catch, for fixing on a display unit; A fixing base, for fixing on another said display unit; a through hole is provided in the fixing base; A lock rod, which is inserted into the through hole of the fixing base and can move along the axis of the through hole; the lock rod includes opposite first and second ends, and the first end of the lock rod can extend out of the fixing base to engage with the lock catch; A handle, which is fixed on the second end of the lock rod and is used to drive the lock rod to move; A locking unit, which is rotatably connected to the lock rod and is located between the fixing base and the handle; the locking unit has at least a switchable locked state and unlocked state; Wherein, in the locked state, the locking unit is limited to be able to rotate unidirectionally around the lock rod in a first direction, so that the locking unit approaches and abuts against the fixing base to tightly abut the lock catch and the fixing base; in the unlocked state, the locking unit can rotate bidirectionally around the lock rod in the first direction and in a second direction opposite to the first direction. When the locking unit rotates around the lock rod in the second direction, the locking unit moves away from the fixing base and releases the tight abutment between the lock catch and the fixing base.

2. The locking device of the display unit according to claim 1, characterized in that, The locking unit includes: A locking handle, which is rotatably connected to the lock rod, and the locking handle can rotate around the lock rod to move away from or close to the fixing base; A one-way locking member, which is rotatably connected to the locking handle, and a locking portion matching the one-way locking member is provided on the lock rod; When the locking unit is in the locked state, the one-way locking member abuts against the locking portion on the lock rod to limit the locking handle to rotate unidirectionally only in the first direction close to the fixing base; when the locking unit is in the unlocked state, the one-way locking member disengages from the locking portion on the lock rod, and the locking handle can rotate bidirectionally around the lock rod.

3. The locking device of the display unit according to claim 2, characterized in that, The one-way locking member includes a body, a tooth engaging portion and an unlocking portion; the tooth engaging portion protrudes from one end of the body facing the lock rod, and the unlocking portion is arranged at one end of the body away from the lock rod and extends out of the locking handle; The locking portion is a ratchet tooth sleeved on the second end of the lock rod; when the locking unit is in the locked state, the tooth engaging portion and the locking portion are engaged with each other, and the tooth engaging portion can only rotate unidirectionally relative to the lock rod; when the unlocking portion is pressed to disengage the tooth engaging portion from the locking portion, the locking unit is switched from the locked state to the unlocked state, and the locking handle can rotate bidirectionally.

4. The locking device of the display unit according to claim 2, characterized in that, The locking unit includes a first elastic member; the first elastic member is arranged between the locking handle and the one-way locking member, and both ends of the first elastic member respectively abut against the locking handle and the one-way locking member to keep the one-way locking member in abutment with the locking portion on the lock rod.

5. The locking device of the display unit according to claim 2, characterized in that, The locking handle includes a sleeve and a pushing portion; an internal thread is provided in the sleeve, an external thread is provided on the outer side of the lock rod close to the second end, and the sleeve is threadedly connected to the lock rod; the pushing portion is fixed on the outer side wall of the sleeve and can drive the sleeve to rotate relative to the lock rod.

6. The locking device of the display unit according to claim 1, characterized in that, The locking device includes a second elastic member; the second elastic member is sleeved on the lock rod, and two ends of the second elastic member are respectively abutted against the fixed seat and the locking unit.

7. The locking device of the display unit according to claim 1, characterized in that, A guiding groove is formed on the lock rod, and the guiding groove extends along the axial direction of the lock rod; A guiding member is provided on the fixed seat, one end of the guiding member extends into the through hole of the fixed seat and is received in the guiding groove of the lock rod; the guiding member can slide relatively along the extending direction of the guiding groove.

8. The locking device for a display unit according to claim 1, characterized in that, The lock catch includes a housing, a lock piece and a third elastic member; a plugging hole is formed in the housing; the lock piece is movably arranged in the housing, and a limiting hole is formed in the lock piece; the third elastic member is arranged in the housing and abuts against the housing and the lock piece for driving the lock piece to move and reset; A clamping groove is formed at the first end of the lock rod; when the first end of the lock rod is inserted into the plugging interface and the limiting hole of the lock catch; the third elastic member abuts against the lock piece to move, so that the lock piece is clamped into the clamping groove of the lock rod to clamp and fix the first end of the lock rod with the lock catch.

9. The locking device of the display unit according to claim 1, characterized in that The handle includes a holding portion and a connecting portion; the connecting portion is vertically arranged at one end of the holding portion, and a connecting hole is formed in the connecting portion; the second end of the lock rod is received in the connecting hole and is fixed to the connecting portion through a fastener.

10. A display screen, characterized in that, Comprising: A plurality of display units, and the plurality of display units are spliced in sequence; The locking device of the display unit according to any one of claims 1-9; the lock catch of the locking device is arranged on the side wall of a display unit, and the fixed seat of the locking device is fixed on the side wall of another adjacent display unit; the lock rod in the fixed seat can extend into the lock catch and is clamped and fixed with the lock catch; rotating the locking unit to fasten the lock catch and the fixed seat to fixedly splice the adjacent display units.

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